bluuebunny/crossref_metadata_2025 huggingface dataset:
Green hematite depression for reverse selective flotation separation from quartz by locust bean gum
Authors: Kordloo Mehrdad , Khodadadmahmoudi Gholamreza , Ebrahimi Ehsan , Rezaei Ali , Tohry Arash , Chehreh Chelgani Saeed
Published: June 2023

Reverse cationic flotation is currently the main processing technique for upgrading fine hematite from silicates. Flotation is known as an efficient method of mineral enrichment that deals with possibly hazardous chemicals. Thus, using eco-friendly flotation reagents for such a process is an emerging need for sustainable development and green transition. As an innovative approach, this investigation explored the potential of locust bean gum (LBG) as a biodegradable depressant for the selective separation of fine hematite from quartz through reverse cationic flotation. Various flotation conditions (micro and batch flotation) were conducted, and the mechanisms of LBG adsorption have been examined by different analyses (contact angle measurement, surface adsorption, zeta potential measurements, and FT-IR analysis). The micro flotation outcome indicated that the LBG could selectively depress hematite particles with negligible effect on quartz floatability. Flotation of mixed minerals (hematite and quartz mixture in various ratios) indicated that LGB could enhance separation efficiency (hematite recovery > 88%). Outcomes of the surface wettability indicated that even in the presence of the collector (dodecylamine), LBG decreased the hematite work of adhesion and had a slight effect on quartz. The LBG adsorbed selectively by hydrogen bonding on the surface of hematite based on various surface analyses.
Adaptive filter with Riemannian manifold constraint
Authors: Mejia Jose , Mederos Boris , Gordillo Nelly , Ortega Leticia
Published: June 2023

The adaptive filtering theory has been extensively developed, and most of the proposed algorithms work under the assumption of Euclidean space. However, in many applications, the data to be processed comes from a non-linear manifold. In this article, we propose an alternative adaptive filter that works on a manifold, thus generalizing the filtering task to non-Euclidean spaces. To this end, we generalized the least-mean-squared algorithm to work on a manifold using an exponential map. Our experiments showed that the proposed method outperforms other state-of-the-art algorithms in several filtering tasks.
Oligonucleotide mapping via mass spectrometry to enable comprehensive primary structure characterization of an mRNA vaccine against SARS-CoV-2
Authors: Gau Brian C. , Dawdy Andrew W. , Wang Hanliu Leah , Bare Bradley , Castaneda Carlos H. , Friese Olga V. , Thompson Matthew S. , Lerch Thomas F. , Cirelli David J. , Rouse Jason C.
Published: June 2023

Oligonucleotide mapping via liquid chromatography with UV detection coupled to tandem mass spectrometry (LC-UV-MS/MS) was recently developed to support development of Comirnaty, the world’s first commercial mRNA vaccine which immunizes against the SARS-CoV-2 virus. Analogous to peptide mapping of therapeutic protein modalities, oligonucleotide mapping described here provides direct primary structure characterization of mRNA, through enzymatic digestion, accurate mass determinations, and optimized collisionally-induced fragmentation. Sample preparation for oligonucleotide mapping is a rapid, one-pot, one-enzyme digestion. The digest is analyzed via LC-MS/MS with an extended gradient and resulting data analysis employs semi-automated software. In a single method, oligonucleotide mapping readouts include a highly reproducible and completely annotated UV chromatogram with 100% maximum sequence coverage, and a microheterogeneity assessment of 5′ terminus capping and 3′ terminus poly(A)-tail length. Oligonucleotide mapping was pivotal to ensure the quality, safety, and efficacy of mRNA vaccines by providing: confirmation of construct identity and primary structure and assessment of product comparability following manufacturing process changes. More broadly, this technique may be used to directly interrogate the primary structure of RNA molecules in general.
Corrosion mitigation characteristics of some novel organoselenium thiourea derivatives for acid pickling of C1018 steel via experimental and theoretical study
Authors: Abd El-Lateef Hany M. , Khalaf Mai M. , Gouda Mohamed , Yousef T. A. , Kenawy Sayed H. , Abou-Krisha Mortaga M. , Alaasar Mohamed , Shaaban Saad
Published: June 2023

Two organoselenium thiourea derivatives, 1-(4-(methylselanyl)phenyl)-3-phenylthiourea (DS036) and 1-(4-(benzylselanyl)phenyl)-3-phenylthiourea (DS038) were produced and categorized using FTIR and NMR (1H and 13C). The effectiveness of the above two compounds as C-steel corrosion inhibitors in molar HCl was evaluated using the potentiodynamic polarization (PD) and electrochemical impedance spectroscopy (EIS) techniques. PD findings indicate that DS036 and DS038 have mixed-type features. EIS results show that growing their dose not only changes the polarization resistance of C-steel from 18.53 to 363.64 and 463.15 Ω cm2 but also alters the double layer capacitance from 710.9 to 49.7 and 20.5 μF cm−2 in the occurrence of 1.0 mM of DS036 and DS038, respectively. At a 1.0 mM dose, the organoselenium thiourea derivatives displayed the highest inhibition efficiency of 96.65% and 98.54%. The inhibitory molecule adsorption proceeded along the Langmuir isotherm on the steel substrate. The adsorption-free energy of the adsorption process was also intended and indicated a combined chemical and physical adsorption on the C-steel interface. FE-SEM studies support the adsorption and protective abilities of the OSe-based molecule inhibitor systems. In Silico calculations (DFT and MC simulations) explored the attraction between the studied organoselenium thiourea derivatives and corrosive solution anions on a Fe (110) surface. The obtained results show that these compounds can make a suitable preventing surface and control the corrosion rate.
A single-cell trajectory atlas of striatal development
Authors: Anderson Ashley G. , Kulkarni Ashwinikumar , Konopka Genevieve
Published: June 2023

The striatum integrates dense neuromodulatory inputs from many brain regions to coordinate complex behaviors. This integration relies on the coordinated responses from distinct striatal cell types. While previous studies have characterized the cellular and molecular composition of the striatum using single-cell RNA-sequencing at distinct developmental timepoints, the molecular changes spanning embryonic through postnatal development at the single-cell level have not been examined. Here, we combine published mouse striatal single-cell datasets from both embryonic and postnatal timepoints to analyze the developmental trajectory patterns and transcription factor regulatory networks within striatal cell types. Using this integrated dataset, we found that dopamine receptor-1 expressing spiny projection neurons have an extended period of transcriptional dynamics and greater transcriptional complexity over postnatal development compared to dopamine receptor-2 expressing neurons. Moreover, we found the transcription factor, FOXP1, exerts indirect changes to oligodendrocytes. These data can be accessed and further analyzed through an interactive website (https://mouse-striatal-dev.cells.ucsc.edu).
Effect of the molar ratio of (Ni2+ and Fe3+) on the magnetic, optical and antibacterial properties of ternary metal oxide CdO–NiO–Fe2O3 nanocomposites
Authors: Al-Mushki Asma A. A. , Ahmed Abdullah A. A. , Abdulwahab A. M. , Qaid Salem A. S. , Alzayed Nasser S. , Shahabuddin Mohammed , Abduljalil Jameel M. A. , Saad Fuad A. A.
Published: June 2023

In this work, the effect of the molar ratio of (Ni2+and Fe3+) on the properties of CdO–NiO–Fe2O3nanocomposites was investigated. The synthesis of CdO–NiO–Fe2O3nanocomposites was carried out by self-combustion. XRD, UV–Vis, PL and VSM were used to describe the physical properties of the materials. The results showed significant progress in structural and optical properties supporting antibacterial activity. For all samples, the particle size decreased from 28.96 to 24.95 nm with increasing Ni2+content and decreasing Fe3+content, as shown by the XRD pattern, which also shows the crystal structure of cubic CdO, cubic NiO, and cubic γ-Fe2O3spinel. The Ni2+and Fe3+contents in the CdO–NiO–Fe2O3nanocomposites have also been shown to enhance the ferromagnetic properties. Due to the significant coupling between Fe2O3and NiO, the coercivity Hcvalues of the samples increase from 66.4 to 266 Oe. The potential of the nanocomposites for antibacterial activity was investigated against Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa,Escherichia coli, andMoraxella catarrhalis) bacteria. Comparison ofP. aeruginosawithE. coli,S. aureusandM. catarrhalisshowed that it has a stronger antibacterial activity with a ZOI of 25 mm.
Stress-responsive Gdf15 counteracts renointestinal toxicity via autophagic and microbiota reprogramming
Authors: Ray Navin , Park Seung Jun , Jung Hoyung , Kim Juil , Korcsmaros Tamas , Moon Yuseok
Published: June 2023

The integrated stress response (ISR) plays a pivotal role in the cellular stress response, primarily through global translational arrest and the upregulation of cellular adaptation-linked molecules. Growth differentiation factor 15 (Gdf15) is a potent stress-responsive biomarker of clinical inflammatory and metabolic distress in various types of diseases. Herein, we assess whether ISR-driven cellular stress contributes to pathophysiological outcomes by modulating Gdf15. Clinical transcriptome analysis demonstrates that PKR is positively associated with Gdf15 expression in patients with renal injury. Gdf15 expression is dependent on protein kinase R (PKR)-linked ISR during acute renointestinal distress in mice and genetic ablation of Gdf15 aggravates chemical-induced lesions in renal tissues and the gut barrier. An in-depth evaluation of the gut microbiota indicates that Gdf15 is associated with the abundance of mucin metabolism-linked bacteria and their enzymes. Moreover, stress-responsive Gdf15 facilitates mucin production and cellular survival via the reorganization of the autophagy regulatory network. Collectively, ISR-activated Gdf15 counteracts pathological processes via the protective reprogramming of the autophagic network and microbial community, thereby providing robust predictive biomarkers and interventions against renointestinal distress.
Valleys are a potential refuge for the Amazon lowland forest in the face of increased risk of drought
Authors: Pohl Marius J. , Lehnert Lukas W. , Thies Boris , Seeger Konstantin , Berdugo Mónica B. , Gradstein S. Robbert , Bader Maaike Y. , Bendix Jörg
Published: June 2023

The Amazon rainforest is home to an incredible variety of plant and animal species and plays a crucial role in regulating the Earth’s climate. Climate change and human activities are putting this important ecosystem at risk. In particular, increasing droughts are making it harder for certain organisms to survive. Here we analyse a satellite-based data set of fog/low-stratus (FLS) frequency and a spatio-temporal drought index. We show that vulnerable organisms may find refuge in river valleys where FLS provides a source of moisture. We find that these favourable microclimates exist throughout the Amazon basin, with the highest occurrence and stability in steep river valleys. We suggest that protecting these hygric climate change refugia could help preserve the biodiversity and functioning of the Amazon ecosystem in the face of future droughts. This would also help stabilise atmospheric moisture recycling, making the region more resilient to climate change.
A rotating ring disc electrode study of photo(electro)catalyst for nitrogen fixation
Authors: Liu Yu-Hsuan , Huang Po-Wei , Hatzell Marta C.
Published: June 2023

Here, we examine the use of rotating ring disk electrode voltammetry to detect ammonia produced by a nitrogen fixing photo(electro)catalyst. We show that the technique is capable of corroborating bulk measurements but cannot eliminate contamination.
Cloneable inorganic nanoparticles
Authors: Hendricks Alexander R. , Guilliams Bradley F. , Cohen Rachel S. , Tien Tony , McEwen Gavin A. , Borgognoni Kanda M. , Ackerson Christopher J.
Published: June 2023

When a defined protein/peptide (or combinations thereof) control and define the synthesis of an inorganic nanoparticle, the result is a cloneable NanoParticle (cNP).
Thallium(i)phosphorodithioates containing intra- and intermolecular π-hole triel bonds
Authors: Firdoos Tahira , Kumar Pretam , Sharma Nipunn , Gomila Rosa M. , Frontera Antonio , Sood Puneet , Pandey Sushil K.
Published: June 2023

Two new thallium compounds containing intra- and intermolecular triel bonds were isolated and characterized. The triel bonds were studied by HSA and DFT calculations using QTAIM and NCIPlot index methods.
Metallic CoNi nanoparticles anchored on heteroatom-doped carbon/MnO nanowires for improved catalytic performance
Authors: Xie Songbo , He Xiaoying , Xu Jingli , Yin Xue-Bo , Zhang Min
Published: June 2023

CoNi decorated on N, P, and S-doped carbon/MnO nanowires exhibits superior catalytic activities in the reduction of 4-NP as well as robust stability in catalyst recycling. This work highlights the effect of radically constructing a bimetallic catalyst.
Characterisation of magnetic relaxation on extremely long timescales
Authors: Blackmore William J. A. , Gransbury Gemma K. , Evans Peter , Kragskow Jon G. C. , Mills David P. , Chilton Nicholas F.
Published: June 2023

Magnetisation decay measurements are commonly being used to characterise very slow relaxation in single-molecule magnets. We explore measurement protocol and data analysis to define the best practise.
Unravelling synergistic effects in bi-metallic catalysts: deceleration of palladium–gold nanoparticle coarsening in the hydrogenation of cinnamaldehyde
Authors: Pinto Jose , Weilhard Andreas , Norman Luke T. , Lodge Rhys W. , Rogers David M. , Gual Aitor , Cano Israel , Khlobystov Andrei N. , Licence Peter , Alves Fernandes Jesum
Published: June 2023

In this work, we demonstrate that the synergistic effect of PdAu nanoparticles (NPs) in hydrogenation reactions is not only related to high activity but also to their stability when compared to Pd mono-metallic NPs.
Vacancy controlled nanoscale cation ordering leads to high thermoelectric performance
Authors: Pathak Riddhimoy , Xie Lin , Das Subarna , Ghosh Tanmoy , Bhui Animesh , Dolui Kapildeb , Sanyal Dirtha , He Jiaqing , Biswas Kanishka
Published: June 2023

Silver vacancy-induced nanoscale cation ordering in AgSbTe2 elevates its thermoelectric performance.
Recent advances in intramolecular kinetic resolution reactions
Authors: Peng Tianyu , Li Shixin , Yang Dongxu , Wang Linqing
Published: June 2023

This review summarizes the advances in the field of intramolecular kinetic resolution (KR) mediated by non-enzymatic catalysts. The relative classification of intramolecular KR is accomplished and several categories of reactions are discussed.
Synthesis of Sb–pyromellitic acid metal–organic framework material and its sodium storage properties
Authors: He Zhiyan , Zhang Wei , Li Mingqi
Published: June 2023

Synthesize a new Sb–PMA-300 MOF material as anodes for sodium ion batteries with high stable capacity and excellent cycle stability.
The development of chiral metal–organic frameworks for enantioseparation of racemates
Authors: Yasmeen Farzana , Yunus Uzma , Bhatti Moazzam H. , Sher Muhammad , Nadeem Muhammad
Published: June 2023

The article describes the post synthetic modifications of MIL-101(Cr) and their application as solid stationary phase materials for enantioresolution of racemates.
Construction of MWNT supported ultra-small Ag@MnO2 nanoparticles for the ORR and Al–air batteries
Authors: Zhang Yansong , Yin Liankun , Luo Zhihong , Zhuge Xiangqun , Wei Peng , Song Zhou , Luo Kun
Published: June 2023

The development of non-platinum catalysts for high efficiency oxygen reduction reaction (ORR) is one of the research hotspots of fuel cells and metal air cells.
Solvent mixtures for improved electron transfer kinetics of titanium-doped polyoxovanadate-alkoxide clusters
Authors: Dagar Mamta , Corr Molly , Cook Timothy R. , McKone James R. , Matson Ellen M.
Published: June 2023

Accelerated rates of heterogeneous electron transfer (k0) observed for polyoxovanadates in mixed solvent.
Highly efficient and thermally stable broadband near-infrared emitting garnet Ca3Sc2Ge3O12:Cr3+,Ce3+ phosphors for multiple pc-LED applications
Authors: Wang Yining , Shang Mengmeng , Sun Yixin , Deng Minliang , Xing Xiaole , Dang Peipei , Lin Jun
Published: June 2023

The introduction of Ce3+ improves the NIR luminescence properties of CSGG:Cr3+ by energy transfer and lattice distortion.
DGPR‐MPC: Learning‐based model predictive controller for autonomous vehicle path following
Authors: Yu Xuekai , Wang Hai , Teng Chenglong , Sun Xiaoqing , Chen Long , Cai Yingfeng
Published: June 2023

In this paper, the authors investigate the issue of constructing and incorporating an accurate vehicle dynamic model for model predictive control (MPC) with an application to autonomous vehicle path following. To achieve the desired performance, MPC employs a precise dynamic model. However, the uncertainty of complex systems and their operating environments presents a challenge to the development of an adequately accurate vehicle dynamic model. This paper proposes a Deep Gaussian Process Regression (DGPR) method to improve model precision. Meanwhile, the learning model is incorporated into a novel MPC framework to enhance closed‐loop performance. High‐fidelity simulations using CarSim‐MATLAB demonstrate the validity of the proposed approach in terms of enhancing the path following performance and lateral stability under the condition of large curvature at medium to high speeds on roads with different friction coefficients when compared to the nominal MPC approach.
A nine‐level T‐type inverter (9L‐TTI) with voltage boost capability
Authors: Firdous Zarren , Mekhilef Saad , Mishra Nidhi , Mustafa Asif , Seyedmahmoudian Mehdi , Stojcevski Alex
Published: June 2023

This paper introduces a 9L T‐type boost inverter (9L‐TTI) based multilevel topology, which generates a nine‐level output voltage in the boost mode. This topology uses 12 switching elements alongside less voltage stress and one switched capacitor unit. This is the significant advantage of the mentioned topology. Following the discussion of the advantages of the provided design, a comparative study is conducted. This results in a reduction in device counts, cost‐effectiveness, and voltage stress on the devices. For switching scheme, fundamental switching frequency‐based modulation is incorporated by having nearest level control (NLC) technique. For proper validation of this work, it is also demonstrated through test results. Here the results are demonstrated at different load conditions, which include resistive and inductive loads. Further, it is demonstrated at different modulation indices and total harmonic distortion (THD) of converter voltage and current for RL‐load, is validated from the power quality improvement point.
Shock excitation of H2 in the James Webb Space Telescope era
Authors: Kristensen L. E. , Godard B. , Guillard P. , Gusdorf A. , Pineau des Forêts G.
Published: June 2023

Context. Molecular hydrogen, H2, is the most abundant molecule in the Universe. Thanks to its widely spaced energy levels, it predominantly lights up in warm gas, T ≳ 102 K, such as shocked regions externally irradiated or not by interstellar UV photons, and it is one of the prime targets of James Webb Space Telescope (JWST) observations. These may include shocks from protostellar outflows, supernova remnants impinging on molecular clouds, all the way up to starburst galaxies and active galactic nuclei.

Aims. Sophisticated shock models are able to simulate H2 emission from such shocked regions. We aim to explore H2 excitation using shock models, and to test over which parameter space distinct signatures are produced in H2 emission.

Methods. We here present simulated H2 emission using the Paris-Durham shock code over an extensive grid of ~14 000 plane-parallel stationary shock models, a large subset of which are exposed to a semi-isotropic external UV radiation field. The grid samples six input parameters: the preshock density, shock velocity, transverse magnetic field strength, UV radiation field strength, the cosmic-ray-ionization rate, and the abundance of polycyclic aromatic hydrocarbons, PAHs. Physical quantities resulting from our self-consistent calculations, such as temperature, density, and width, have been extracted along with H2 integrated line intensities. These simulations and results are publicly available on the Interstellar Medium Services platform.

Results. The strength of the transverse magnetic field, as quantified by the magnetic scaling factor, b, plays a key role in the excitation of H2. At low values of b (≲0.3, J-type shocks), H2 excitation is dominated by vibrationally excited lines; whereas, at higher values (b ≳ 1, C-type shocks), rotational lines dominate the spectrum for shocks with an external radiation field comparable to (or lower than) the solar neighborhood. Shocks with b ≥ 1 can potentially be spatially resolved with JWST for nearby objects. H2 is typically the dominant coolant at lower densities (≲104 cm−3); at higher densities, other molecules such as CO, OH, and H2O take over at velocities ≲20 km s−1 and atoms, for example, H, O, and S, dominate at higher velocities. Together, the velocity and density set the input kinetic energy flux. When this increases, the excitation and integrated intensity of H2 increases similarly. An external UV field mainly serves to increase the excitation, particularly for shocks where the input radiation energy is comparable to the input kinetic energy flux. These results provide an overview of the energetic reprocessing of input kinetic energy flux and the resulting H2 line emission.
Analysis of Flood Carrying Capacity Change of Small and Medium-sized Rivers in the Upper Reaches of the Zhanghe River in Southern Shanxi
Authors: Li Ziming
Published: June 2023

Using hydrological data and historical flood survey data of the design rivers, the cross-sections of different reaches are measured, and the hydraulic factors of each cross-section are calculated. HEC-RAS (5.0.7) software is used to analyze and calculate the flood water surface lines of different reaches. Taking the cross-sections measured furthest upstream as the starting points and flood peak discharges of 2% flood frequency and the corresponding water levels as the initial and boundary conditions, the design water surface lines of the design reaches are calculated, And recheck calculation of embankment top elevations is performed. And the results show that: (1) the main channels of the rivers shrink continuously due to the short flood discharge time and the influence of farming and other human activities; (2) the average longitudinal slopes of the Cuiguo Village and Du Village reaches of the Jimingshui River are 9.8 ‰ and 7.2 ‰ respectively, and the average longitudinal slope of the Xixiawang Village reach of the Qinjiagou River is 8.6 ‰; (3) the roughness values of different reaches are analyzed, and the calculated design flood water levels of the Cuiguo Village and Du Village reaches of the Jimingshui River and the Xixiawang Village reach of the Qinjiagou River when a great flood with P=2% occurs are 966.6 m, 938.05 m and 931.16 m, respectively, which are all lower than the embankment top elevations of the left and right banks by more than 2 meters, indicating that the flood in these reaches will not overflow and can pass safely.
Assessing the Future Trajectory of the China’s Electric Vehicle Industry: A Mini-Review of the Greenhouse Gas Emissions in Beijing and Shenzhen
Authors: Hope James , Yang Haoyi , Gu Mingyan , Fang Cong , Li Yuanzhe
Published: June 2023

Electric vehicles (EVs) have emerged as a promising solution to mitigate environmental degradation caused by transportation. The increased concerns over climate change and air pollution have accelerated the adoption of EVs globally. The use of renewable energy sources such as solar and wind power to charge EVs significantly reduces the emission of harmful gases, contributing to cleaner air and a healthier environment. The transition to EVs has the potential to create a significant positive impact on the environment, reducing the carbon footprint of the transportation sector. This study will explore the potential benefits of EVs for reducing greenhouse gas emissions, air pollution, and noise pollution. Furthermore, this research will consider the impact of EVs on the energy grid and investigate the feasibility of integrating renewable energy sources to power EVs. The study will also examine the economic and social implications of EV adoption and the potential for job creation in the EV industry. The findings of this research will contribute to a better understanding of the role that EVs play in mitigating the environmental impact of transportation. This research is especially relevant as the world moves towards a more sustainable and decarbonized future. Policymakers, industry leaders, and consumers can use the insights gained from this study to make informed decisions about the future of transportation and its impact on the environment. In conclusion, this study aims to provide a comprehensive assessment of the environmental impact of EVs and their potential to create a sustainable future for transportation.
Study on the Influence and Countermeasures of the Canal Projects on Aquatic Ecological Environment of Rivers along the Line
Authors: Ning Zhang , Zhiyuan Bao , Liguo Zhang , Yujian Gao , Yang Xiao , Jinxiang Cheng , Zhaoxing Han
Published: June 2023

Canal plays a prominent role in improving regional transportation conditions, regional economic development and cultural dissemination. However, the complexity of the canal project will inevitably cause disturbance to water bodies and develop a series of impacts. This paper summarizes the engineering contents involved in the canal projects, combines the experience of the waterway and water conservancy hub on the water ecological environment, analyzes the main environmental impacts on the aquatic ecology along the canal during the construction and operation periods. Then effective countermeasures were proposed at different levels, such as canal design, engineering construction and ecological restoration. This work can serve as a reference for the protection of the aquatic ecological environment in canal development.
Analysis and Application of Eco-environmental Value of Saihanba Forest Farm Based on Fuzzy Analytic Hierarchy Process and K-Means Clustering
Authors: Wen Xuejuan , Bi Lingxiao , Sun Yang , Tian Yilin , Qiu Ruofeng , Qi Yunfei , Xie Wu , Liu Tao
Published: June 2023

In this paper, we aim to establish an evaluation model for the impact of Saihanba on the ecological environment to quantitatively evaluate its impact due to its significant role on maintaining ecological balance and stability. We apply the fuzzy analytic hierarchy process method on building an evaluation model of Saihanba with a multilevel evaluation factor system. In addition, we promote the model with the help of the K-means clustering analysis method after optimizing to determine which geographical locations in China and Pakistan need to establish ecological reservation.
Leaching characteristics and potential risk assessment of heavy metals Pb-Cd from mining soils in an acid rain environment
Authors: Yang Xue , Wang Huifang , Li Yuancheng , Lv Dongpeng
Published: June 2023

To investigate the pollution characteristics of Pb and Cd in mining soil, dynamic leaching tests was conducted to explore the leaching characteristics. Pollution was evaluated using the Risk Index (RI) and Assessment Code (RAC). The results showed that under simulated acid rain, the soil had a certain buffer capacity, the pH value of leaching solution varied between 5.0 and 8.5. Heavy metals release also varied, with the highest amount of Pb dissolved being 2.27 mgꞏL-1, while that of Cd was relatively low, the highest is 0.93 mgꞏL−1. Moreover, heavy metals with larger particle sizes showed a greater propensity for dissolution when subjected to acid rain. BCR extraction revealed that the initial heavy metal status was mostly residual. After leaching, heavy metal morphology changed drastically, with the residual state of reducing significantly. RAC and RI indicated a moderate risk of Pb and Cd pollution under different treatment conditions.
A Preliminary Study of Dewatering of Filter Mud from Sugar Mills
Authors: Liang Yong , Li Jie , Li Qingtao
Published: June 2023

In order to facilitate the comprehensive reuse of the filter mud from sugar mills, the experiment of dewatering by expression of the filter mud was performed to investigate its dewatering properties. The results showed that the expression pressure has a significant effect on the dewatering properties. The moisture content of the filter mud decreased significantly as pressure increased in the lower range, and gradually became equilibrium in higher range. During the expression, the moisture contents of the mud decreased dramatically at the beginning, and then approached equilibrium. A simplified model is established for pre-dicting the variation of moisture content of the filter mud with time. The developed model has a good agreement with the experiment data.
Design of Substation Carbon Emission Prediction Model Based on Cloud Model
Authors: Wang Zilei , Wang Shuhao , Li Yu
Published: June 2023

In order to achieve the goal of energy conservation and emission reduction, all walks of life are taking active actions. Power system, as the main dispatching application of energy, is in full swing in the monitoring and management of carbon emissions and other related studies. The purpose of this paper is to study the design of substation carbon emission prediction model based on the cloud model. First, the basic concepts and numerical characteristics of the cloud model are introduced. Secondly, it introduces the principle of carbon emission prediction method based on cloud model and the common carbon emission prediction method. Combining the real-time substation carbon emission data simulation with the cloud model prediction, the prediction results were compared with the BP neural network, and two average error values were used to measure the prediction results. It was found that the cloud model had a higher accuracy in predicting carbon emission, which verified its feasibility and superiority.
Study of Runoff and Pollution Control in Sponge Cities based on Storm Water Management Model
Authors: Zhang Dakuan , Li Yangpei
Published: June 2023

To better solve the problems of water environment degradation and water shortage caused by urbanization, sponge cities have become a hot research topic. How to evaluate the effect of sponge facilities on runoff and pollution control and conduct benefit analysis is an urgent problem. In this paper, we simulate the runoff control, SS and COD control effects of low impact development (LID) facilities for 0.5a, 1a, 2a, 5a, 10a and 20a rainfall return periods before and after the construction of a sponge city in the southern part of Licang District, Qingdao, China. The results show that the model Nash efficiency coefficient is more than 0.8, which is in line with the reality, and the LID facility can play the role of runoff and pollutants control. 68.2% of the runoff volume is reduced and 70.4% of SS is removed at the return period of P=0.5a, which is the best effect. As the return period increases, the control rates of runoff and pollutants gradually become lower. It can provide a basis for future sponge city effect evaluation.
Research of advanced treatment technologies for chlorophenol wastewater
Authors: Wang Jianguang , Li Shiyi , Fang Haifeng , Fu Shengjie , Lin Xiaohu
Published: June 2023

Chlorophenol wastewater belongs to highly toxic industrial wastewater, which can cause serious harm to the environment and human health if not treated effectively. The current treatment methods for chlorophenol wastewater are divided into physical, chemical, and biological methods. The physical adsorption experiment found that the monodisperse magnetic nano-column was prepared by the solvothermal method, which could remove 91.5% of pentachlorophenol within 30 mins. More than 90% of chlorophenol can be extracted using an ionic liquid as an extractant. When the chlorophenol reaches 15 g/L, the extraction rate only slightly decreases. CaO and SiO2 can achieve 99.0% 2,4,6-trichlorophenol in 6 hours as ball milling materials by physical and chemical methods. The electrochemical reduction test found that using Pd/Py SDBS/Ti as the cathode, 2-chlorophenol, 4-chlorophenol, and 3-chlorophenol could be reduced and dechlorinated, in which 100 mg/L of 2-chlorophenol could be completely degraded within 60 minutes. The biochemical index BOD5/COD of wastewater is less than 0.3 if the biological treatment technology based on co-metabolism is adopted to realize the chlorophenol treatment. In treating chlorophenol wastewater, the application scenario should be fully considered to achieve the best treatment effect of chlorophenol wastewater.
Loss Characteristics of Non-point Pollutant from a Mixed Agriculture Watershed
Authors: Liu Junda , Hu Haiying , Zeng Jiaxing
Published: June 2023

In order to explore the temporal and spatial variability of non-point source pollution in an agriculture watershed, the water quality and quantity characteristics of five flood events at Shuangqiao station in Siheshui watershed (south China) were monitored. Five pollutants, including BOD5, TSS, TP, TN, and NH3-N, were measured and analyzed. The characteristics of pollutant concentrations and load-transport rates were investigated. It is shown that the pollutant concentrations in the flood events are remarkably larger than those in the non-flood events. The temporal sequences of peak values between pollutant parameters and runoff flows are explored. It indicates that the time interval would be short if the high-intensity rainfall occurred in the initial period of a flood event. Most of the peak values of pollutant concentrations preceded the flow peaks. The correlation coefficients between TSS and other pollutant concentrations are analyzed. It is shown that there is a significant correlation between the concentrations of TSS and TP in the flood events.
Removal of low concentration ammonia nitrogen enhanced by hydraulic cavitation combined with ozonation
Authors: Zheng Yan , Wang Jian-gang , Liu Xiaoyan , Long Zhiqiang , Sun Mochuan
Published: June 2023

The combination of hydraulic cavitation and ozone oxidation improves the removal efficiency of low concentration ammonia nitrogen. Focusing on the treatment of low concentration ammonia nitrogen wastewater (about 25mg/L), the study discusses the treatment effect of cavitation combined with different gases (O2, O3) on low concentration ammonia nitrogen. The treatment effect of ozone 3L/min combined with cavitation on ammonia nitrogen is 33.07%. The treatment effect of oxygen (3mg/L) combined with cavitation on ammonia nitrogen was 16.91%. At the same time, the treatment efficiency of ammonia nitrogen at different PH values was compared. When the initial concentration was adjusted from 7 to 10, the treatment efficiency increased from 33.07% to 84.55%. When PH=10, the ammonia nitrogen concentration in water finally dropped to 3.5mg/L, reaching the Chinese first-level emission standard (15mg/L). In addition, the mechanism of treating ammonia nitrogen in water by hydraulic cavitation combined with ozonation was discussed. The results show that ozone combined cavitation is very effective for the treatment of low concentration ammonia nitrogen wastewater.
Design and Construction of Urban Stormwater Return Flow Design Platform Based on Big Data Platform
Authors: Wang Zicheng
Published: June 2023

The stormwater system is an important infrastructure for the city, playing an important safety role in reducing and removing water from roads and avoiding urban flooding. With the acceleration of urbanization and the accentuation of urban heat island effect, urban surface runoff shows the trend of high flow rate and fast flow rate, which leads to the increase of drainage load of urban stormwater system and the increase of risk of urban flooding. Therefore, it is necessary to adopt a scientific method to conduct a comprehensive analysis of the overall drainage capacity and safe conveyance capacity of the urban stormwater system, so as to do the preliminary paving work for the transformation of the existing stormwater system and improve the urban drainage capacity. In this paper, based on the analysis of the current status of urban stormwater system, the concept of urban stormwater system vulnerability is proposed and the indicators of stormwater system vulnerability are determined.
Frozen salting hydrogels consisting of polydopamine and hydroxyapatite used for oil-water separation
Authors: Xie Wanshan , Wu Weipeng , Xia Mengsheng , Shi Qian , Chen Yan
Published: June 2023

In recent years, with the continuous advancement of industrialization and economic globalization, oil spill pollution incidents have become more and more frequent, among which marine oil pollution is the most prominent. If a large amount of oily sewage is not treated in time, it will pose a great threat to the safety of marine ecology. In this work, natural and biological materials were used to prepare PDA-HAP hydrogel, and the membrane was treated by freezing and salting out to effectively improve the strength of the membrane. The prepared membrane has good flux, can be used repeatedly, and is environmentally friendly. Therefore, this PDA-HAP hydrogel will play a significant role in the field of oily sewage treatment.
Effect of pH on the Removal of Landfill Leachate Pollutant by DTRO
Authors: Long Tao
Published: June 2023

The operating pressure of the first-stage DTRO and the removal efficiency of COD, BOD, TP observed within 180 min at pH 6.5, pH 7, and pH 7.5, respectively, then the mechanism analysed and optimization methods recommended. The results show that the operating pressure reached its fastest increasing rate at pH 7.5, which grew from 32.13 to 32.66 Bar rapidly. The removal efficiency of all major pollutants increased steadily with uptime before stability. The maximum removal rates of COD, BOD, TP were 97.9%, 97.36%, and 97.7% at pH 7.5, respectively. The system performance can be improved by adjusting the pH value of the leachate to 6 ~ 7 during operation.
Research on infill adjustment method for XX narrow and thin sand body oilfield
Authors: Gao Hongliang
Published: June 2023

The sedimentation of XX oilfield is mainly composed of underwater distributary channel sedimentation, and the sand body has the characteristics of “narrow, thin, and scattered”. Although basic well network development, primary and local secondary infill, edge expansion adjustment, and corresponding injection production relationship adjustments have been carried out, there are still problems in current development, such as poor well network adaptability, low utilization degree of thin and poor layers, fast production decline rate, long shut-in wells, and many inefficient wells. In order to explore the potential of infill adjustment in narrow and thin sand body oilfields and further improve oilfield recovery efficiency, well pattern infill adjustment work has been carried out, achieving good results. A supporting infill adjustment technology has been formed, which includes “well seismic joint fine reservoir prediction, multi-disciplinary research on remaining oil quantification, multi-parameter evaluation of infill well location optimization, and multi information fusion perforation layer optimization”, effectively improving the development effect.
Multi-objective optimization design of a heavy-duty folding mechanism and Self-discharging equipment development
Authors: Huang Juan , Li Chongxiang , Long Huang , Yin Lairong , Wen Bo , Wang Jinhang
Published: June 2023

In this paper, we investigated the technical problem of the recovery of overlength and heavy load conveying booms of self-unloading ships. A method of folding the conveying boom with a hydraulic-four-bar mechanism is presented, and by using a mathematical model for the optimization of folding velocity stationary with ADAMS software, the optimization data and results were obtained. The multi-objective optimization index is introduced, and the multi-objective optimization problem is discussed. The results of the multi-objective optimization showed that parameters such as angular velocity and the change of angular acceleration of the conveyor boom were optimized. The paper has manufactured the connecting rod mechanism, and developed the self-discharging folding conveyance equipment. Through practical application, we determined that the developed folding conveying equipment had the advantages of smooth movement and high folding efficiency.
Beam profilers
Authors: Hatanaka Logan , Gragnic Louis
Published: June 2023

Since the first devices appeared in the 1960s, lasers have become deeply entrenched in many industries. Modern applications leverage a wide variety of lasers for increasingly complex processes. But how do we ensure that important beam characteristics are aligned with expectations?
Messung der Herzfrequenz von Passagieren und Flugpersonal mittels kamerabasierter Photoplethysmographie
Authors: Passand Johannes , Rediske Stephan , Lichtenstein Leonid , Rothacker Leonard , Lieske Christoph
Published: June 2023

Die kontinuierliche Messung der Herzfrequenz von Passagieren oder des Flugpersonals während eines Fluges kann aus verschiedenen Gründen von Vorteil sein. Eine kontaktbasierte Messung während des Fluges ist wegen der damit verbundenen Einschränkungen allerdings nicht praktikabel. Es ist jedoch auch möglich, die Herzfrequenz kontaktlos auf der Basis von Kamerabildern bzw. Videodaten zu ermitteln. In dieser Arbeit wird die Anwendbarkeit einer solchen kontaktlosen, bildbasierten Messung der Herzfrequenz in einer Flugzeugkabine untersucht. Unter Verwendung einer herkömmlichen USB-Kamera wurde die Herzfrequenz durch die Analyse von Farbintensitätsänderungen in bestimmten Bereichen des Gesichts ermittelt. Das entwickelte System wurde im Hinblick auf seine Robustheit gegenüber Kopfbewegungen und den typischen Vibrationen in einem Flugzeug bewertet. Die Ergebnisse zeigten, dass mit einer einfachen Kamera unter bestimmten Einschränkungen eine zuverlässige Schätzung der Herzfrequenz möglich ist. Es wurde auch gezeigt, dass die Vibrationen eines Flugzeugs keinen Einfluss auf die Genauigkeit der geschätzten Herzfrequenz haben.
Impact of Introducing a PACU24 Concept on the Perioperative Outcome of Patients with Advanced Ovarian Cancer Treated with Cytoreductive Surgery
Authors: Reuter Susanne , Schmalfeldt Barbara , Haas Sebastian A. , Zapf Antonia , Cevirme Sinan , Prieske Katharina , Wölber Linn , Müller Volkmar , Zöllner Christian , Jaeger Anna
Published: June 2023

Patients with ovarian cancer who undergo multivisceral surgery usually require intensive care monitoring postoperatively. In view of the ever-fewer numbers of high-care/intensive care
beds and the introduction of fast-track treatment concepts, it is increasingly being suggested that these patients should be cared for postoperatively in 24-h Post Anesthesia Care Units
(PACU24). No analyses have been carried out to date to investigate whether such a postoperative care concept might be associated with a potential increase in postoperative complications in
this patient cohort.

A PACU24 unit was set up in our institution in 2015 and it has become the primary postoperative care pathway for patients with ovarian cancer who have undergone cytoreductive (debulking)
surgery. A structured, retrospective analysis of data from patients treated before (control group) and after (PACU group) the introduction of this care concept was carried out, with
a particular focus on postoperative complications and secondary admission to an intensive care unit where necessary.

The data of 42 patients were analyzed for the PACU group and 45 patients for the control group. According to the analysis, the preoperative and surgical data of both groups were
comparable (age, ASA, BMI, FIGO stage, duration of surgery, blood loss). The Physiological and Operative Severity Score for the enUmeration of Mortality and morbidity (POSSUM score) as a
measure for the risk of postoperative complications was higher in the PACU group (11.1% vs. 9.7%, p = 0.001). Patients in the PACU group underwent bowel resection with anastomosis
significantly more often (76.3% vs. 33.3%, p < 0.001), although the extent of surgery was otherwise comparable. The total number, type and severity of postoperative complications and
the duration of the overall stay in hospital did not differ between the two groups. None of the patients required secondary transfer from the PACU or normal ward to an intensive care unit
(ICU).

Our data support the assumption that the care concept of transferring patients to a PACU24 represents a safe and cost-saving care pathway for the postoperative care of patients even after
complex gynecological-oncological procedures.
Transanale Tumorresektion: Indikation, Operationstechniken und Komplikationsmanagement
Authors: Sailer Marco
Published: June 2023

Bei den transanalen Resektionsverfahren handelt es sich um spezielle Operationsmethoden der minimalinvasiven Therapie von Rektumtumoren. Neben gutartigen Tumoren eignet sich diese
Operationsmethode für die Resektion von sog. Low-Risk-T1-Rektumkarzinomen, wenn diese aufgrund ihrer Größe und Lokalisation sicher im Gesunden (R0) entfernt werden können. Bei stringenter
Patientenselektion werden sehr gute onkologische Ergebnisse erzielt. Derzeit wird in diversen internationalen Studien evaluiert, ob lokale Resektionsverfahren onkologisch ausreichend sind,
wenn eine komplette oder fast komplette Remission nach neoadjuvanter Radio-/Chemotherapie vorliegt. Zahlreiche Untersuchungen belegen, dass insbesondere die funktionellen Resultate und die
postoperative Lebensqualität nach lokalen Resektionen hervorragend sind, zumal als Alternativoperationen die tiefe Rektumresektion bzw. die abdominoperineale Exstirpation zu diskutieren
sind, die bekanntermaßen sehr häufig mit funktionellen Defiziten einhergehen.

Schwere Komplikationen sind sehr selten. Typische Minorkomplikationen sind ein postoperativer Harnverhalt oder transiente Temperaturerhöhungen. Eine Nahtdehiszenz verläuft i. d. R.
klinisch inapparent. Als relevante Komplikationen sind vor allem Nachblutungen und die Eröffnung des Peritoneums zu nennen. Letztere müssen intraoperativ erkannt und entsprechend versorgt
werden, was meist transanal oder minimalinvasiv gelingt. Sehr selten kommt es zu Infektionen, Abszessen, rektovaginalen Fisteln oder Verletzungen von Prostata und Harnröhre.
Hals, Nase und Ohren in der Schwerelosigkeit: die kosmischen Herausforderungen der HNO-Heilkunde
Authors: Zimmermann Philipp Heinrich , Jansen Stefanie , Klußmann Jens Peter
Published: June 2023

Die bemannte Raumfahrt stellt besondere Anforderungen an den menschlichen Körper, auch an die Organe im HNO-Bereich. Diese Organe spielen eine entscheidende Rolle bei der Aufrechterhaltung der Gesundheit und Sicherheit der Astronauten im Weltraum. In diesem Beitrag werden häufige HNO-Probleme in der Raumfahrt besprochen, darunter Ödeme der oberen Atemwege, Mittelohr- und Mastoidergüsse, Hörverlust und Schwindel mit Übelkeit. Wir erörtern die zugrunde liegenden Mechanismen, die zu diesen Beschwerden beitragen, ihre klinischen Erscheinungsformen und mögliche Behandlungsstrategien. Darüber hinaus untersuchen wir die möglichen Auswirkungen dieser Erkrankungen auf die Gesundheit der Astronauten und die Ergebnisse der Mission. Schließlich betonen wir die Bedeutung von Präventivmaßnahmen und zukünftiger Forschung in diesem Bereich, um die Gesundheit und Sicherheit der Astronauten auf zukünftigen Missionen zu optimieren.