bluuebunny/crossref_metadata_2025 huggingface dataset:
Interleukin 17 signaling supports clinical benefit of dual CTLA-4 and PD-1 checkpoint inhibition in melanoma
Authors: Váraljai Renáta , Zimmer Lisa , Al-Matary Yahya , Kaptein Paulien , Albrecht Lea J. , Shannan Batool , Brase Jan C. , Gusenleitner Daniel , Amaral Teresa , Wyss Nina , Utikal Jochen , Flatz Lukas , Rambow Florian , Reinhardt Hans Christian , Dick Jenny , Engel Daniel R. , Horn Susanne , Ugurel Selma , Sondermann Wiebke , Livingstone Elisabeth , Sucker Antje , Paschen Annette , Zhao Fang , Placke Jan M. , Klose Jasmin M. , Fendler Wolfgang P. , Thommen Daniela S. , Helfrich Iris , Schadendorf Dirk , Roesch Alexander
Published: July 2023

Recent studies suggest that BRAFV600-mutated melanomas in particular respond to dual anti-programmed cell death protein 1 (PD-1) and anti-cytotoxic T lymphocyte-associated protein 4 (CTLA-4) immune checkpoint inhibition (ICI). Here we identified an over-representation of interleukin (IL)-17–type 17 helper T (TH17) gene expression signatures (GES) in BRAFV600-mutated tumors. Moreover, high baseline IL-17 GES consistently predicted clinical responses in dual-ICI-treated patient cohorts but not in mono anti-CTLA-4 or anti-PD-1 ICI cohorts. High IL-17 GES corresponded to tumor infiltration with T cells and neutrophils. Accordingly, high neutrophil infiltration correlated with clinical response specifically to dual ICI, and tumor-associated neutrophils also showed strong IL-17–TH17 pathway activity and T cell activation capacity. Both the blockade of IL-17A and the depletion of neutrophils impaired dual-ICI response and decreased T cell activation. Finally, high IL-17A levels in the blood of patients with melanoma indicated a higher global TH17 cytokine profile preceding clinical response to dual ICI but not to anti-PD-1 monotherapy, suggesting a future role as a biomarker for patient stratification.
Association of birth and childhood weight with risk of chronic diseases and multimorbidity in adulthood
Authors: Zhang Yue , Zhou Yaguan , Cheng Yangyang , Carrillo-Larco Rodrigo M. , Fawad Muhammad , Chen Shu , Xu Xiaolin
Published: July 2023

Background

Little is known about the relationship between early life body size and occurrence of life-course multiple chronic diseases (multimorbidity). We aim to evaluate associations of birth weight, childhood body size, and their changes with the risks of chronic diseases and multimorbidity.

Methods

This prospective cohort study included 246,495 UK Biobank participants (aged 40–69 years) who reported birth weight and childhood body size at 10 years old. Birth weight was categorized into low, normal, and high; childhood body size was reported as being thinner, average, or plumper. Multimorbidity was defined as having two or more of 38 chronic conditions retrieved from inpatient hospital data until 31 December, 2020. The Cox regression and quasi-Poisson mixed effects models were used to estimate the associations.

Results

We show that 57,071 (23.2%) participants develop multimorbidity. Low birth weight (hazard ratio [HR] 1.29, 95% confidence interval [CI] 1.26–1.33), high birth weight (HR 1.02, 95% CI > 1.00–1.05), thinner (HR 1.21, 95% CI 1.18–1.23) and plumper body size (HR 1.06, 95% CI 1.04–1.09) are associated with higher risks of multimorbidity. A U-shaped relationship between birth weight and multimorbidity is observed. Changing to be thinner or plumper is associated with multimorbidity and many conditions, compared to changing to be average.

Conclusions

Low birth weight, being thinner and changing to have a thinner body size in childhood are associated with higher risks of developing multimorbidity and many chronic conditions in adulthood. Early monitoring and maintaining a normal body size in childhood could have life-course benefits for preventing multimorbidity above and beyond individual conditions.
Extending Se substitution to the limit: from 5S to 5Se in high-efficiency non-fullerene acceptors
Authors: Song Guangkun , Feng Wanying , Li Yu , Liang Huazhe , Li Zhixiang , Kan Bin , Wan Xiangjian , Yao Zhaoyang , Li Chenxi , Chen Yongsheng
Published: July 2023

Based on the newly synthesized seleno[3,2-b]selenophene unit, two near-infrared non-fullerene acceptors (NFAs) of 4Se and 5Se are constructed by replacing four or all sulfurs with selenium in high-efficiency Y-series NFAs.
Crystallographic and dielectric studies of tetrahedral {NH4@Fe4} crystallized with halomethane molecules
Authors: Matsumoto Daiki , Tanaka Chiaki , Fujibayashi Masaru , Nishihara Sadafumi , Takahashi Kiyonori , Nakamura Takayoshi , Akutagawa Tomoyuki , Masuya-Suzuki Atsuko , Tsunashima Ryo
Published: July 2023

A tetrahedral Fe4 cluster was distorted by crystallizing with halomethane molecules.
How complex–surface interactions modulate the spin transition of Fe(ii) SCO complexes supported on metallic surfaces?
Authors: Sánchez-de-Armas Rocío , Jaber El lala Iman , Calzado Carmen J.
Published: July 2023

The deposition of the [Fe(phen)2(NCS)2] spin-crossover complex on Au(111), Cu(111) and Ag(111) has been investigated using periodic DFT+U calculations, with the aim of evaluating how different metallic surfaces affect the spin state switching.
Influence of metal binding on the conformational landscape of neurofilament peptides
Authors: Silva-Brea David , de Sancho David , Lopez Xabier
Published: July 2023

In order to understand the preferred modes of chelation in metal-binding peptides, quantum mechanical calculations can be used to compute energies, resulting in a hierarchy of binding affinities.
Enantioconvergent transformations of secondary alcohols through borrowing hydrogen catalysis
Authors: Gao Yaru , Hong Guorong , Yang Bin-Miao , Zhao Yu
Published: July 2023

Enantioconvergent transformations of racemic secondary alcohols to enantioenriched chiral amines, N-heterocycles, higher-order alcohols and ketones through borrowing hydrogen catalysis is covered in this review.
The driving effects of common atmospheric molecules for formation of clusters: the case of sulfuric acid, formic acid, hydrochloric acid, ammonia, and dimethylamine
Authors: Longsworth Olivia M. , Bready Conor J. , Shields George C.
Published: July 2023

One of the main sources of uncertainty for understanding global warming is understanding the formation of larger secondary aerosols.
Combined effects of P25 TiO2 nanoparticles and disposable face mask leachate on microalgae Scenedesmus obliquus: analysing the effects of heavy metals
Authors: Das Soupam , Mukherjee Amitava
Published: July 2023

Disposable surgical face masks extensively used during the COVID-19 outbreak would release microplastics into the aquatic environment and that in combination with TiO2 nanoparticles may harm the aquatic biota.
Sustainable tailor-made and bio-based high-performance lubricants that combine biorenewability, biodegradability and economic efficiency
Authors: Koch Luisa , Guntermann Alina , Hirschbichler Katharina , Plass Carmen , Betke Tobias , Ma Ling , Kilthau Thomas , Gröger Harald
Published: July 2023

A new generation of bio-based lubricants is presented, which fulfil the criteria of (1) a biorenewable raw material basis, (2) biodegradability, (3) suitability for fine-tuning of performance properties, and (4) an efficient catalytic preparation.
Surface nanotopography and cell shape modulate tumor cell susceptibility to NK cell cytotoxicity
Authors: Cho Yongbum , Kim JangHyuk , Park Jeehun , Doh Junsang
Published: July 2023

The roles of surface nanotopography and tumor cell morphologies in NK cell cytotoxicity were studied using micro/nanofabrication technology. These findings will be useful for the development of immune cell-based solid tumor treatments.
Recent advances in the syntheses of guaianolides
Authors: Fernandes Rodney A. , Moharana Sanjita , Khatun Gulenur Nesha
Published: July 2023

Diverse syntheses of guaianolides are reviewed encompassing various strategies that display the tactics involved in addressing the key 5,7,5-core structure and various oxygenations ornamented in these molecules.
Development of nanostructured formulation from naringenin and silk fibroin and application for inhibition of lipoxygenase (LOX)
Authors: Holanda Fabrício H. , Pereira Rayanne R. , Marinho Victor Hugo S. , Jimenez David E. Q. , Costa Ferreira Lindalva M. M. , Ribeiro-Costa Roseane M. , de Sousa Francisco Fábio O. , Ferreira Irlon M.
Published: July 2023

A simple low-energy method was used to obtain polymeric nanoparticles containing silk fibroin (SF), fatty butyl esters (oily phase) and the flavonoid naringenin, with high inhibition of the enzyme lipoxygenase in vitro.
Recent developments in natural biopolymer based drug delivery systems
Authors: Fazal Tanzeela , Murtaza Bibi Nazia , Shah Mazloom , Iqbal Shahid , Rehman Mujaddad-ur , Jaber Fadi , Dera Ayed A. , Awwad Nasser S. , Ibrahium Hala A.
Published: July 2023

Our findings revealed that the composition of the constituents, reaction conditions, and synthetic processes all influence the characteristics and therefore the applications of the resulting biopolymer composites.
Activating biomass carbon with metallurgical slag by pyrolysis in molten salt for high-performance supercapacitors
Authors: Lv Teng , Li Jun , Shi Yong , Yu Huan , Chen Jing
Published: July 2023

Co-pyrolysis of biomass and zinc smelting slag results in porous carbon with high specific area and various metallic/nonmetallic dopants, contributing to enhanced capacitance.
Retraction: Synthesis and characterization of AFe2O4 (A: Ni, Co, Mg)–silica nanocomposites and their application for the removal of dibenzothiophene (DBT) by an adsorption process: kinetics, isotherms and experimental design
Authors: Vafaee Fahimeh , Mandizadeh Samira , Amiri Omid , Jahangiri Mansour , Salavati-Niasari Masoud
Published: July 2023

Retraction of ‘Synthesis and characterization of AFe2O4 (A: Ni, Co, Mg)–silica nanocomposites and their application for the removal of dibenzothiophene (DBT) by an adsorption process: kinetics, isotherms and experimental design’ by F. Vafaee et al., RSC Adv., 2021, 11, 22661–22676, https://doi.org/10.1039/D1RA02780H.
Microwave-assisted impregnation of highly dispersed Mo over HZSM-5 using various Mo precursors for methane dehydroaromatization
Authors: Mishra Deepti , Balyan Sonit , Zhao Xiu Song , Konarova Muxina , Pant K. K.
Published: July 2023

Two different Mo oxide precursors (α-MoO3 and h-MoO3) were synthesized to study their effect on the catalytic activity toward methane dehydroaromatization. To improve the dispersibility, microwave assisted impregnation of Mo precursors over the HZSM-5 support was employed.
The membrane regulator squalane increases membrane rigidity under high hydrostatic pressure in archaeal membrane mimics
Authors: LoRicco Josephine G. , Hoffmann Ingo , Caliò Antonino , Peters Judith
Published: July 2023

Apolar lipids within the membranes of archaea are thought to play a role in membrane regulation.
Thermochromic smart windows with broad-range customizable responsive temperature via the Hofmeister effect
Authors: Peng Hongchao , Yang Xuekun , Gu Yingchun , Yang Qin , Lan Tu , Chen Sheng , Yan Bin
Published: July 2023

This work proposes a novel responsive temperature customization stratagem for thermochromic smart windows by tuning the low critical solution temperature of thermally responsive materials via the Hofmeister effect.
Recent advances in glucose-oxidase-based nanocomposites for diabetes diagnosis and treatment
Authors: Yang Dejun , Cai Chunyan , Liu Kai , Peng Zhaolei , Yan Chunmei , Xi Jingjing , Xie Fan , Li Xiaofang
Published: July 2023

Development of GOx-based nanomaterials for diabetes diagnosis and treatment.
Correction: Current and promising applications of Hf(iv)-based MOFs in cancer therapy
Authors: Chen Xuelin , Li Minmin , Lin Mingzi , Lu Chengyu , Kumar Abhinav , Pan Ying , Liu Jianqiang , Peng Yanqiong
Published: July 2023

Correction for ‘Current and promising applications of Hf(iv)-based MOFs in cancer therapy’ by Xuelin Chen et al., J. Mater. Chem. B, 2023, 11, 5693–5714, https://doi.org/10.1039/D3TB00267E.
Large-scale measurement of soil organic carbon using compact near-infrared spectrophotometers: effect of soil sample preparation and the use of local modelling
Authors: Fonseca Aymbiré A. , Pasquini Celio , Soares Emanuelle. M. B.
Published: July 2023

Compact NIR instruments are a cost-effective alternative for large-scale SOC determination. The best performance was found using local modelling and soil sample preparation.
Examination of an Automated Procedure for Calculating Morphological Complexity
Authors: Wood Carla , Garcia-Salas Miguel , Schatschneider Christopher
Published: July 2023

Purpose:

The aim of this study was to advance the analysis of written language transcripts by validating an automated scoring procedure using an automated open-access tool for calculating morphological complexity (MC) from written transcripts.

Method:

The MC of words in 146 written responses of students in fifth grade was assessed using two procedures: (a) hand-coding of words containing derivational morphemes by trained scorers and (b) an automated analysis of MC using Morpholex, a newly developed web-based tool. Correlational analysis between the different MC calculations was examined to consider the relation between hand-coded derivational morpheme counts and the automated measures. Additionally, all MC measures were compared to a previously gathered rating of writing quality to consider predictive validity between the automated Morpholex score and teachers' ratings of writing quality.

Results:

Automated measures of MC had a strong relation (
r =
.63) with hand-coding of the number of words with derivational morphemes. Additionally, the number of derivational and inflectional and derivational morphemes accounted for a significant amount of the variation in teachers' overall ratings of writing quality.

Conclusion:

Automated scoring of MC has potential utility as a valid alternative to hand-coding language samples, which may be valuable for progress monitoring of growth in complexity across repeated samples and measuring components that influence perceived quality of academic writing.
Improving object detection by enhancing the effect of localisation quality evaluation on detection confidence
Authors: Wang Zuyi , Zhao Wei , Xu Li
Published: July 2023

The one‐stage object detector has been widely applied in many computer vision applications due to its high detection efficiency and simple framework. However, one‐stage detectors heavily rely on Non‐maximum Suppression to remove the duplicated predictions for the same objects, and the detectors produce detection confidence to measure the quality of those predictions. The localisation quality is an important factor to evaluate the predicted bounding boxes, but its role has not been fully utilised in previous works. To alleviate the problem, the Quality Prediction Block (QPB), a lightweight sub‐network, is designed by the authors, which strengthens the effect of localisation quality evaluation on detection confidence by leveraging the features of predicted bounding boxes. The QPB is simple in structure and applies to different forms of detection confidence. Extensive experiments are conducted on the public benchmarks, MS COCO, PASCAL VOC and Berkeley DeepDrive. The results demonstrate the effectiveness of our method in the detectors with various forms of detection confidence. The proposed approach also achieves better performance in the stronger one‐stage detectors.
Micro (nano) Plastics Released from Plastic Food Containers
Authors: Duan Ziyi , Zhao Yating , Liu Xia , Li Guoxin
Published: July 2023

The pollution of micro (nano) plastics is one of the most urgent global environmental problems. Micro (nano) plastics will release from plastic products (e.g., food related products) to the environment, causing potential threats to human health and ecosystem. Therefore, the release of micro (nano) plastics from plastic products (e.g., food containers) deserves more concerns. In the present work, plastic food container was chosen to investigate the release of micro (nano) plastics under two heating methods (100 ℃ hot water and microwave heating) and reuse within nine times were further investigated the release characteristics. The findings demonstrate that: (1) The maximum release amount was 10.3±0.2×1010 particles/L, which was occurred under microwave heating, and it was twice greater than that under hot water heating, indicating that microwave heating could enhance micro (nano) plastics releasing; (2) The amounts of released micro (nano) plastics would fluctuate, and the fluctuation was getting smaller as the use times increasing; (3) The number of use times had no influence on the released particle size, and the amount of nanoplastics (<400 nm) was dominant in the released micro (nano) plastics. Therefore, micro (nano) plastics production from food containers represents a key source of microplastic contamination in the ecosystem.
Molecular Dynamics Simulation of the Aggregation of Extracellular Polymeric Substance
Authors: Liu Yingjie , Liu Xia , Liu Lu
Published: July 2023

Extracellular polymeric substance (EPS) play an important role in the transport and transformation of pollutants. At present, some scholars have conducted basic experimental characterization of EPS, but the molecular lev-el interactions among the various components of EPS still need to be fully characterized. Here, we use molecular dynamics (MD) simulation to explore the structural properties of EPS systems in atomic detail. The process and mechanism of the aggregation of different EPS components (polysaccharide, lipid, nucleic acid and protein) were revealed by the simulation results. EPS aggregation consist of a hydrophobic core and an amphiphilic exterior. Lipid tail, as a hydrophobic core, promoted the aggregation of EPS. But strong hy-drophilic nucleic acid and protein components inhibited the aggregation of EPS in water and were located outside the aggregation body. The details of the structure of EPS aggregation are revealed here, which provides a micro molecular mechanism for understanding the interaction between EPS.
Emission Characteristics of NOx During the Combustion of Waste Energetic Materials
Authors: Wang ShouYu , Jin GuoRui , He WeiDong
Published: July 2023

A large amount of NOx will be produced during the combustion process of waste energetic materials (EMs), which is extremely harmful to human health and ecological environment, and has become an urgent problem for all countries to solve. In this paper, the NOx emission characteristics of four typical types of waste EMs (double-base propellant, TNT, triple-base propellant and RDX) under different temperature and atmosphere conditions were studied by tube furnace experiment. The results showed that under the condition of nitrogen environment, with the increase of temperature, the combustion reaction of waste EMs was accelerated, NOx emission and nitrogen conversion rate decreased. Under the same experimental conditions, the nitrogen content of waste EMs was not proportional to nitrogen conversion. With the increase of oxygen content, NOx emissions and nitrogen conversion rate increased, which was not conducive to the control of NOx emissions. Therefore, the waste EMs burned in 1000 ℃ and nitrogen environment, the emission of NOx was the lowest. The results of this study provide reliable data support for the realization of green and clean burning of waste EMs.
Influence of Monitor Current on Electrical Performance of Photovoltaic Module (PERC/HJT/Topcon) in Thermal Cycle Test
Authors: Zhou Weixin
Published: July 2023

IEC 61215-2: 2016 is an international standard about testing photovoltaic (PV) module reliability, in which the thermal cycle (TC) test item mainly has focused on thermal stress interaction of PV modules between different materials. At TC testing different stages, except for high working current (Imp), low current (Max. 1 %*Imp) has been turned on continuously as monitor current in order to evaluate the field operation situation of photovoltaic modules. In this paper, the test programme are designed meticulously and I-V data&EL pictures test results are discussed according to the influence level of monitor current on PERC, HJT and TOPCon modules. Three types of PV modules have performed the respective I-V characteristics and thus the values of Isc, Voc and Pmp have appeared different trends.
Study on Preparation and Properties of TiO2/Biochar by Phosphoric Acid Modifition
Authors: Wang Hongru , Liu Huiping
Published: July 2023

In this study, phosphoric acid was proposed as an activator to mix and activate the biomass and tetrabutyl titanate, and the parameters were adjusted to obtain the optimum conditions for the preparation of photocatalysts. The specific surface area of the composite photocatalysts prepared under the high ratio (phosphoric acid: peanut shell = 2:1) of phosphoric acid modification was obtained to be 317 m2ꞏg-1, with an average pore size of 32 nm and a large number of hydrophilic groups on the surface of the material to improve hydrophilicity. The results showed that the adsorption and degradation of methylene blue by the one-step modified composite photocatalyst was 102.5 mg/g, and the adsorption-degradation efficiency reached 99.4%, which had excellent water treatment effect and improved the application possibility of the composite photocatalyst in water treatment.
Literature Review on Effect of Sludge Age on Microbial Community Structure in HMBR
Authors: Li Min , Cao Weiyuan , Zhang Zhiheng , Peng Guosen , Hu Zhixiang , Zhou Guozhi , Dong Kun
Published: July 2023

The composite membrane biological treatment process has the characteristics of high quality effluent and low membrane pollution, which is widely used in domestic and international water treatment industry. Based on the review of the basic research on membrane fouling mechanism and the comparison of the research results of MBR at home and abroad, from the perspective of microbial ecology, based on the new generation of environmental microbial analysis technology of high-throughput sequencing, this paper expounds the microbial ecological mechanism that sludge age changes the content of microbial metabolites and membrane fouling process by affecting the microbial community structure and physiological characteristics.
Effect of Composite Microbial Biopolymer Treatment on Hydraulic Conductivity of Completely Decomposed Granite Soil
Authors: Li Zhaofeng , Wu Fan , Chen Zhidong , Zhang Lingshuai , Chu Shoucheng
Published: July 2023

In southeast China, slope with completely decomposed granite (CDG) soil is susceptible to landslide under heavy rainfall, due to the fissure-rich and slaking characteristics of this kind of soil. In this context, this study attempted to hydraulically improve the CDG soil in a low-carbon manner by using the composite of xanthan gum and guar gum (i.e., two different microbial biopolymers), as an alternative to cement. Hydraulic conductivity of the treated soil was measured using a tailer-made apparatus. Test result shows that the biopolymer content of 2% could lower the conductivity by over 1000 times, and the ratio of 1:1 between Xanthan and guar gums yielded the best performance in general. Application of composite biopolymer to the slope with weathered granitic soil was investigated using the finite element method simulation. Numerical result indicates that the treatment can eliminate the slope failure effectively under rainfall with a hundred-year return period.
Redox Stable Electrode Material of Symmetrical Solid Oxide Fuel Cells
Authors: Zhao PeiJun
Published: July 2023

Solid oxide fuel cells (SOFCs) technologies are considered the most efficient and environmentally-friendly option for both stationary and distributed power generation due to their advantages of low pollution, low noise and strong building blocks. Despite the potential, widespread adoption of SOFC technology has not yet been achieved. The main reason is that the high cost of manufacturing and maintenance and the insufficient operating life make SOFC technology less competitive economically. More and more people begin to pay attention to symmetrical solid oxide fuel cells (SSOFCs) because SSOFCs have many potential advantages, such as improving the thermal mechanical compatibility between electrolyte and electrode, reducing manufacturing costs, and improving the ability to resist coking and sulfur poisoning. This article reviews the development of SSOFCs redox stable electrodes in recent years, summarizes the current research hotspots, and looks forward to the future development of redox stable electrode materials.
Study on the Influence of Plane Strain on Optical Properties of InP Materials through First-Principles Calculations
Authors: Shen Qiao , Zhi Chengyang , Zhang Yanyan
Published: July 2023

This research scrutinizes the impact of plane strain on the optical characteristics of Indium Phosphide (InP) employing first-principles methodology, grounded on the Density Functional Theory (DFT). The findings suggest that the peaks of the spectral response curves of the dielectric function, refractive index, extinction coefficient, optical absorption coefficient, and reflection coefficient of InP, when subjected to plane tension strain, shift towards lower energy of electromagnetic wave frequency in the horizontal coordinate. Concurrently, static quantities such as the dielectric coefficient, refractive coefficient, and reflection coefficient of InP demonstrate an upward trend with an increase in the plane tension strain. Intriguingly, the influence of compressive strain on the photoelectric response of InP manifests contrary behavior to that of the tensile strain.
Study on the Delineation of Small Layers and Depositional Micro-Phases in the Qing San Section of the Gaotaizi Formation in Qian'an Oilfield Block 130
Authors: Yang Pengcheng , Zhang Qingguo , Li Zhixiang , Yang Shuyu
Published: July 2023

The fine isochronous comparison and fine portrayal of sedimentary micro-phases for the stratigraphy of Qian130 block in Qian'an oilfield is a critical problem that needs to be solved in the field nowadays. The target section of the study is the XII Sand Formation in Section III of the Upper Cretaceous Qingshankou Formation, and the oil-bearing formation is the Gaotaizi Oil Formation. Based on field outcrops, cores, logs and other data, a comparative stratigraphic framework of small stratigraphic levels was established and single well phases, continuous well profiles and planar sedimentary phases were studied for the deltaic foreland depositional system of the three sections of the Qingshankou Formation in the Qian'an Oilfield, guided by stratigraphic stratigraphy theory[1-2]. The analysis concludes that the regional structure is located in the northern part of the Changling Depression in the central depressional area of the southern part of the Songliao Basin, where faults are developed. The three sedimentary microphases of the Qingshankou Formation include six microphases: submerged divergent channel, estuarine dam, submerged divergent channel flank, submerged divergent interbay, distant sand dam, and matted sand. Combining the sedimentary micro-phase map of the small layer time unit with the oil formation sandstone thickness map, sand-to-ground ratio map and effective thickness map of the oil formation, the oil and water distribution in the study area is correctly understood to guide the next development of the Qian'an oil field[3-4].
Evaluation of Logging Characteristics of the Yablunivske Oil and Gas Condensate Filed
Authors: Zhang Qingguo , Zhang Ying
Published: July 2023

A study of the reservoir characteristics of the Tournaisian formation in the Yablunivske oil and gas condensate filed shows that the pore structure of the reservoir in this area is complex and the pore permeability varies widely. Based on the reservoir logging response characteristics, core analysis data and logging curves GR, DT and normal resistivity curves, the reservoir mud content, porosity, permeability, bound water saturation and gas saturation parameters were calculated by statistical regression methods. The calculation accuracy of the established log interpretation models is high, which can meet the development needs of the oilfield and also lay the foundation for the subsequent study of the reservoir.
Research on structural evolution characteristics of overburden rock for shallow buried thick coal seam mining
Authors: Zhang Hua Ji
Published: July 2023

In order to grasp the structural evolution characteristics of overburden rock in shallow buried thick coal seam mining, the mechanism of overburden rock destabilization in the mining of 42106 comprehensive release workings in the 4-2 coal seam of Bultai coal mine was analyzed by using theoretical analysis, similar simulation and numerical simulation. The results show that: with the increase of the workface recovery length, the overburden of the comprehensive release workface experiences a continuous dynamic sinking process; the initial pressure step is about 95m, and the initial breakage position of the key layer is located at the back of the workface, and the periodic pressure step is about 25m, and the breakage position is located in front of the coal wall; when the workface recovery distance is from 65m to 95m, the overburden support stress of the comprehensive release workface appears to rise abruptly at the initial pressure. trend.
Analysis on the Characteristics of Annual Changes and the Detention Effect of Nitrogen and Phosphorus Nutrients in Plain Reservoirs
Authors: Li Budong , Chen Kaiqi , Liu Xiaobo , Liu Chang , Wang Shiyan
Published: July 2023

In order to study the annual variation characteristics and the retention effect of nitrogen and phosphorus nutrients in plain reservoirs, taking Daheiting Reservoir in North China Plain as an example, the annual variation characteristics of total phosphorus (TP), total nitrogen (TN), ammonia nitrogen (NH3-N) and nitrate nitrogen (NO3-N) in Saheqiao and dam front water of Daheiting Reservoir from January 2018 to December 2018 were analyzed. On this basis, the retention rate of nitrogen and phosphorus and the actual retention rate of Daheiting Reservoir are calculated and analyzed. The results show that the annual average actual retention rate of Daheiting Reservoir in 2018 is only 65.70%, and other indicators are negative. The overall performance of water quality indicators in the year is that the retention effect in wet seasons is greater than that in dry seasons, and the retention effect is affected by the absorption and transformation of algae in the reservoir, the precipitation of particulate nutrients, the release of sediment and the operation and regulation of the reservoir, in which the operation and regulation of the reservoir plays a decisive function. The results show that Daheiting Reservoir has obvious interception effect on TP and still plays the role of “sink”, while it basically maintains the balance of nitrogen.
Analysis of Energy Efficient Features in Traditional Hill Architecture of Himachal Pradesh, India for its Indoor Performance in Sub-Tropical Climate
Authors: Singh Mayank
Published: July 2023

Vernacular architecture of any region highlights the architecture and construction methods developed by the locals, in need to provide indoor thermal comfort amidst outdoor climatic conditions which is done using the locally available materials and construction techniques in response to the climatic conditions and geographic location. At present in India, standardized building materials and construction methods are adopted for modern buildings due to the easy availability of materials and also serving well economically. This paper presents the results of a field study and simulations to investigate the thermal and energy performance of selected case study, two traditional houses using adobe blocks, rammed earth and stone construction are compared to a modern house using a masonry envelope, the construction material is altered by adding insulation to the building envelope to study the differences in the performance of original construction. The case study is located in Dharamshala town in the upper reaches of Kangra valley, Himachal Pradesh, India having a sub-tropical humid climatic condition. Hourly indoor temperatures of the houses were monitored and a field survey was done to collect the data, and simulations were carried using dynamic thermal simulation software DesignBuilder, the monitored data was then used to match the parameters in simulation models. The results show that indoor temperatures of traditional mud house provide better thermal comfort when compared to modern house, however, slightly high energy demand in traditional house is observed due to increase in discomfort hours.
Progress in First-Principles Studies of MoS2
Authors: Zhao Zexin
Published: July 2023

First-principles is a quantum mechanical calculation method that does not require any empirical parameters or experimental data input to predict material properties and calculate the electronic structure of materials. MoS2 has extensive applications in nanoelectronics, optoelectronics, and other fields. To expand the application range of MoS2 in nanodevices, its photoelectric properties need to be adjusted through methods such as changing the number of layers, doping, adsorption, applying external electric fields, or strain. This work reviews the research progress of first-principles calculations in MoS2 in recent years, mainly summarizing the progress of first-principles calculations in two aspects: applying strain and doping MoS2.
Polymerization of Aryl Polyisocyanides Catalyzed by N-Heterocyclic Carbene-Ligated Scandium Trialkyl Complex
Authors: Liu Jia , Liu Yi , Zhang Shaowen
Published: July 2023

Polyisocyanide has attracted continuous attention because of its stable helical rod structure and its wide application, it has a unique π-conjugated system in which the carbon-nitrogen double bond in each unit is twisted along the polymeric backbone to form a helical configuration. In this paper, a series of aryl isocyanides polymers are prepared using N-heterocyclic carbene-ligated scandium trialkyl complex 1 (IPr)Sc(CH2SiMe3)3 as the catalyst and 2 equiv. [Ph3C][B(C6F5)4] as the co-catalyst. The catalyst can convert 96% of 100 equiv. monomer in 5 minutes and the activity of the polymerization can reach 329 kg of polymer molSc-1 h-1. Two optically active polymers are obtained by using chiral monomers, they show strong CD signal at 364 nm and the two signals are opposite.
Amino functionalized SBA-15 Loaded Rh Catalyst for Asymmetric Hydroformylation of Styrene
Authors: Tao Yong , Ma Mengchuan , Lv Zhiguo , Guo Zhenmei
Published: July 2023

A recoverable Rh/N-SBA-15 heterogeneous catalyst for asymmetric hydroformylation of styrene was prepared by post grafting method. XRD, TG, 29Si MAS NMR and ICP characterization, revealed that the introduction of amino silane and RhCl3 had no adverse influence on the ordered mesoporous structure of the support. The Rh/N-SBA-15 catalyst was proved to be highly efficacious and stable for asymmetric hydroformylation of styrene. The experimental results demonstrated that amino silane improved the loading capacity of SBA-15 to RhCl3, and thereby improved its catalytic performance. The high efficiency and recyclability of Rh/N-SBA-15 catalyst demonstrated its great potential for application in asymmetric hydroformylation reactions.
Experimental Study on Efficient Recovery of High-Grade Sulfide Ore
Authors: Li Guangsheng , Zhu Xingfu , Qin Xiang-wei , Cai Mingming , Xu Chao
Published: July 2023

A gold mine is a typical broken zone altered rock type gold deposit, with some high grade primary sulfide ore at 20~30m from the surface, and the ore grade is about 5g/t. To understand the nature of the ore, Performed the process mineralogy testing and analysis, The occurrence state of the gold mineral is very good, Most gold is bare gold, It is conducive to the enrichment and recovery; To determine the best selection process and parameters, Conducted experimental studies including Nelson reselection and flotation, Finally determined to adopt the Nielsen reselection-heavy tail flotation process, Au grade 42.15g/t, Au recovery rate of 48.92%; Reconcentration tailings after one rough selection, two sweeps, two selection, Au grade 38.26g/t, The grade of Au of tailings is 0.16g/t; The combined Au recovery rate of reselection + flotation was 97.39%, The concentrate quality and recovery indexes are all good, The benefits are considerable.
Study on the Influence of Silicon and Aluminum on the Microstructure and Properties of Low Cobalt M42 High-Speed Steel
Authors: Wang Shunduo , Chen Yunbo , Pan Peng , Lin Zhenghua , Zuo Lingli
Published: July 2023

M42 HSS (W2Mo9Cr4VCo8 ) is widely used as a high cobalt super-hard high-speed steel (HSS) for various cutting tool materials, but high cobalt HSS does not bring good economic benefits. In this paper, the effects of Si and Al on the organization and mechanical properties of low cobalt M42 HSS were investigated. The microstructure of HSS was analyzed by OM, SEM, EDS, XRD, etc. Rockwell hardness test, impact toughness test and flexural strength test were conducted. The results of the study showed that only increasing the Si content in M42 HSS containing 4.0% Co did not significantly improve the material organization and properties, and caused a sharp deterioration in impact toughness. After adding 1.0% Si and 1.0% Al to M42 HSS containing 4.0% Co, Si and Al can partially replace Co, resulting in a more uniform and diffuse carbide distribution. The hardness of the material is increased to 68.3 HRC and the impact toughness is increased to 13.8 Jꞏcm-2, which has better overall mechanical properties and can meet the processing and cutting requirements under actual working conditions.
Study on Water-Driving Law and Remaining Oil Distribution Pattern in Ultra-low Permeability Reservoir
Authors: Liu Ping , Zhang Jiaosheng , Wang Jing , Zhong Huayu , Wang Ruiheng , Li Wenfang
Published: July 2023

The water-cut rises quickly and the remaining oil distribution is complex when the ultra-low permeability reservoir enters the high water cut stage. The comprehensive use of reservoir engineering, dynamic monitoring, numerical simulation, core experiments and other methods, this paper systematically summarizes three types of water-driving law and distribution characteristics of remaining oil, which are pore-fracture flow, pore-fracture flow and fracture flow. It is considered that the horizontal water drive is mainly controlled by material source, well pattern and fracture, while the vertical water drive is mainly controlled by reservoir heterogeneity, water line distance, injection-production well distance, etc. , the patterns of residual oil formed by different types of percolation are different, in this paper, 7 macroscopic patterns of remaining oil distribution, such as well pattern control, heterogeneity control, single sand body connected control, longitudinal interference, injection-production non-correspondence and non-main reservoir unutilized, are summarized, in the light of different remaining oil patterns, the paper puts forward the adjustment direction of tapping potential, such as optimizing injection-production structure, optimizing injection-production mode.
Study on the Influence of Underground Filling Body on Flotation Index of Beneficiation in Gold Mine
Authors: Zhang Xiaoguang , Li Guangsheng , Zhu Xingfu , Qin Guanglin
Published: July 2023

The processing capacity of a gold concentrator in Shandong mine is 10000 t/d, and the production process of one-stage grinding + one roughing, two sweeping and one finishing is adopted. The grinding fineness is 50%-55% of -200 mesh content, the flotation concentration is 40%-45%, and the dosage of butyl xanthate used as collector is 120 (g/t). The amount of QX-3 used as foaming agent is 40 (g/t), and the field flotation recovery rate is 93.74%. Because the mixing of tailings backfill into raw ore will cause the deterioration of flotation index, this study aims to find out the influence of tailings backfill in gold ore on flotation index, and put forward reasonable suggestions, so as to provide technical guidance for the mixing of tailings backfill in the subsequent production of gold mine.
Response of Growth and Physiological Characteristics and Root Soil Reinforcement of Artemisia Ordosica to Erosion Damage in Shendong Mining Area
Authors: Li Bin , Zhang Xin , Kang Yanfen , Liu Kai
Published: July 2023

To clarify the response mechanism of plant to root erosion damage in Shendong mining areas, Artemisia ordosica was taken as the research object, the response of growth and physiological indexes to root fracture and the effects of cyclic load of erosion force on the tensile properties of root were analyzed. The results showed that the net photosynthetic rate and transpiration rate of A. ordosica leaves decreased with increasing root breakage, the net photosynthetic rate decreased by 17.62%, 26.06% and 42.11%, the transpiration rate decreased by 11.97%, 25.98% and 51.15% after mild, moderate and severe damage, respectively, compared with the control. Compared with the control, the water use efficiency of light, moderate and severe damage increased by 5.39%, 10.74% and 38.43%, respectively; root disruption significantly inhibited the growth of A. ordosica, the growth rate of height, crown width, branch length and diameter decreased by 38.91%, 42.61%, 68.10% and 65.84%, respectively after severe damage compared with the control.
Modeling and control strategy for hydrogen production systems coupled with PV and battery storage
Authors: Hu Wenbo , Zhu Liangliang , Dou Zhenlan , Zhang Chunyan , Wang Kui
Published: July 2023

Environmental conditions can significantly affect the performance of photovoltaic (PV) hydrogen production systems, resulting in fluctuations in PV output and suboptimal hydrogen production. In order to solve these problems, a voltage stabilization control based approach has been implemented for a photovoltaic integrated hydrogen production system, which is based on an existing hydrogen production model coupled to PV storage. The aim of this approach is to enhance system stability, improve the quality of photovoltaic power generation, and optimize hydrogen production. The strategy includes maximum power point tracking (MPPT) control for the PV system, as well as coordinated control of the electrochemical energy storage system to ensure stable bus voltage and efficient use of solar resources. The effectiveness of this control strategy was demonstrated by simulation.
Characteristics and Changing Trend of Water Pollution in North Plain of Shang Yu
Authors: Wang Lixin , Guo Wanying , Wang Ziming , Yao Pengcheng , Hu Guojian , You Aiju
Published: July 2023

The plain river network area is strongly influenced by human activities, with flat terrain, weak hydrodynamics and poor water quality. Previous studies have mostly focused on water quality categories, lacking an overall study of the pollution characteristics of water bodies and their changing trends. In order to comprehensively grasp the water pollution situation of the river network in the northern Yu Plain, this study scientifically analysed the water quality characteristics of the river network in the northern Yu Plain and its correlation with rainfall through regression analysis and MK mutation test based on the long series of water quality and rainfall data of the Dongjin River and Unity River in the northern Yu Plain from 2017-2021. The results show that the correlation between water quality and rainfall in the river network of the northern Yu Plain is not significant, reflecting that the pollution in the watershed is still controlled by point sources, but there is a trend for the Unity River to change to non-point source control; the CODMn, NH3-N and TP of the Dongjin River and Unity River all show a high positive correlation, and the correlation of the Dongjin River is higher than that of the Unity River; the MK mutation test shows that there is no significant mutation point in the Dongjin River in the last five years, and the Unity River has no significant mutation point in the last five years. The MK mutation test shows that there is no significant mutation point in Dongjin River in the past 5 years, and there is a sudden change in water quality in Unity River from 2017 to 2018, and the water quality indexes show a decreasing trend in general, but remain stable in recent years. The study aims to academically reveal the dominant factors, pollutant characteristics and water quality trends of pollutants in rivers in the northern Yu Plain, and to propose scientific references for the pollution prevention and control of other plain river networks.
Study on Pollution Characteristics and Ecological Risks of Microplastics in Ningyuan River
Authors: Qiao Zhizhuang , Gao Shengyuan , Ma Yingkai
Published: July 2023

A survey was conducted on the surface water samples of Ningyuan River in Hainan Province. The samples were collected through on-site filtration and concentration methods, and pretreated through oxidation digestion and density separation. The microplastics were statistically analyzed by confocal micro-Raman spectrometer, elucidating the abundance, type, particle size, and shape characteristics of the microplastics in the water samples. Seasonal differences were analyzed, and the main conclusions were as follows: microplastics were detected at all sampling points, with the abundance range of 66.67 items/m3 to 1106.67 items/m3; polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), and polystyrene (PS) are the main types of microplastics; 100-1000 μm is the main particle size distribution range; the proportion order of microplastics with different shapes is fiber> fragment> film> particle. In terms of spatial distribution, there are significant differences due to the influence of functional zones along the river banks, while in terms of seasonal distribution, there is no significant difference between dry and rainy seasons; The overall level of microplastic pollution belongs to a medium to low risk.
Research on the Treatment of Regional Air Pollution
Authors: Huang Jinhong , Feng Qiming
Published: July 2023

According to the change of air quality in the Beijing-Tianjin-Hebei region, this paper analyzes the pollution characteristics of the air environment in this region, constructs the air quality evaluation model, and finds that the main pollution sources affecting the air quality in Beijing-Tianjin-Hebei region are coal combustion and automobile exhaust. By using the flow-diffusion equation, the air pollution concentration gradients of the Second Ring Road, the Fourth Ring Road, and the Sixth Ring Road in Beijing are given. Finally, this paper also puts forward specific countermeasures for the prevention and control of air pollution.
Study on Microstructure and Silting Characteristics of Soft Soil: A Case Study of Nansha District, Guangzhou
Authors: Liang Zhu , Zhang Qinghua , Yang Fei , He Bing
Published: July 2023

With the development of society and economy, land subsidence in soft soil areas has become a prominent geological disaster in our country’s coastal area. Land subsidence has the characteristics of irreversibility, wide influence range, long aging, etc., and these characteristics are closely related to the characteristics of soft soil, such as physical and mechanical parameters, microstructure characteristics, etc. The Nansha District of Guangzhou was taken as the study area in this paper. Through the collection of preliminary data, two-dimensional scanning electron microscopy, and three-dimensional Computed Tomography (CT), the micro-structure characteristics of soft soil are expounded and its plugging characteristics are further analyzed. The results show that the study area’s soft soil has a honeycomb, granular, and flocculent structure. From the perspective of pore scale distribution, the number of macropores and ultramicro pores is small, and the continuity is poor. In most small and medium pores, namely the aggregate and granular pores. The siltation of soft soil is closely related to the microstructure of soil and can be treated according to the effect of siltation characteristics on the consolidation settlement of soft soil. The research results of this paper can provide targeted prevention and control suggestions for the soft land subsidence disaster in the Nansha area, and also provide a reference for other similar research.