bluuebunny/crossref_metadata_2025 huggingface dataset:
No impacts of glyphosate or Crithidia bombi, or their combination, on the bumblebee microbiome
Authors: Straw Edward A. , Mesnage Robin , Brown Mark J. F. , Antoniou Michael N.
Published: June 2023

Pesticides are recognised as a key threat to pollinators, impacting their health in many ways. One route through which pesticides can affect pollinators like bumblebees is through the gut microbiome, with knock-on effects on their immune system and parasite resistance. We tested the impacts of a high acute oral dose of glyphosate on the gut microbiome of the buff tailed bumblebee (Bombus terrestris), and glyphosate’s interaction with the gut parasite (Crithidia bombi). We used a fully crossed design measuring bee mortality, parasite intensity and the bacterial composition in the gut microbiome estimated from the relative abundance of 16S rRNA amplicons. We found no impact of either glyphosate, C. bombi, or their combination on any metric, including bacterial composition. This result differs from studies on honeybees, which have consistently found an impact of glyphosate on gut bacterial composition. This is potentially explained by the use of an acute exposure, rather than a chronic exposure, and the difference in test species. Since A. mellifera is used as a model species to represent pollinators more broadly in risk assessment, our results highlight that caution is needed in extrapolating gut microbiome results from A. mellifera to other bee species.
A single-phase direct buck-boost AC–AC converter with minimum number of components
Authors: Adel Fawzy , Lashine Azza E. , El-Sabbe Awad E. , Osheba Dina S. M.
Published: June 2023

In this paper, a single-phase direct pulse width modulation (PWM) buck-boost AC–AC converter is proposed. The proposed converter utilizes a minimum number of semiconductor switches and passive components that decreases the converter power losses and offers high efficiency. It can be operated with simple PWM control and doesn’t require soft-commutation strategies. It does not suffer from input source shoot-through and commutation problems. Moreover, it supplies both continuous input and output currents. The common sharing ground of the input and output gives the proposed converter the feature that it can be utilized for voltage sag and swell compensation. A comparison of the proposed converter performance with similar existing converters is presented. Also, detailed circuit analysis, component design guidelines, and simulation results using the MATLAB/Simulink environment are demonstrated. A laboratory prototype has been built and tested to validate the converter performance and confirm the results obtained by computer simulation.
Biosynthesis of Co3O4 nanomedicine by using Mollugo oppositifolia L. aqueous leaf extract and its antimicrobial, mosquito larvicidal activities
Authors: Gowthami P. , Kosiha A. , Meenakshi S. , Boopathy G. , Ramu A. G. , Choi Dongjin
Published: June 2023

Nanotechnology is a relatively revolutionary area that generates day-to-day advancement. It makes a significant impact on our daily life. For example, in parasitology, catalysis and cosmetics, nanoparticles possess distinctive possessions that make it possible for them in a broad range of areas. We utilized Mollugo oppositifolia L. aqueous leaf extract assisted chemical reduction method to synthesize Co3O4 nanoparticles. Biosynthesized Co3O4 Nps were confirmed via UV–Vis spectroscopy, scanning electron microscope, X-ray diffraction, EDX, Fourier-transform infrared, and HR-TEM analysis. The crystallite size from XRD studies revealed around 22.7 nm. The biosynthesized Co3O4 nanoparticle was further assessed for mosquito larvicidal activity against south-urban mosquito larvae Culex quinquefasciatus, and antimicrobial activities. The synthesized Co3O4 particle (2) displayed significant larvicidal activity towards mosquito larvae Culex quinquefasciatus with the LD50 value of 34.96 µg/mL than aqueous plant extract (1) and control Permethrin with the LD50 value of 82.41 and 72.44 µg/mL. When compared to the standard antibacterial treatment, Ciprofloxacin, the Co3O4 nanoparticle (2) produced demonstrates significantly enhanced antibacterial action against the pathogens E. coli and B. cereus. The MIC for Co3O4 nanoparticles 2 against C. albicans was under 1 μg/mL, which was much lower than the MIC for the control drug, clotrimale, which was 2 µg per milliliter. Co3O4 nanoparticles 2, with a MIC of 2 μg/mL, has much higher antifungal activity than clotrimale, whose MIC is 4 μg/mL, against M. audouinii.
Combination of triheptanoin with the ketogenic diet in Glucose transporter type 1 deficiency (G1D)
Authors: Avila Adrian , Málaga Ignacio , Sirsi Deepa , Kayani Saima , Primeaux Sharon , Kathote Gauri A. , Jakkamsetti Vikram , Kallem Raja Reddy , Putnam William C. , Park Jason Y. , Shinnar Shlomo , Pascual Juan M.
Published: June 2023

Fuel influx and metabolism replenish carbon lost during normal neural activity. Ketogenic diets studied in epilepsy, dementia and other disorders do not sustain such replenishment because their ketone body derivatives contain four carbon atoms and are thus devoid of this anaplerotic or net carbon donor capacity. Yet, in these diseases carbon depletion is often inferred from cerebral fluorodeoxyglucose-positron emission tomography. Further, ketogenic diets may prove incompletely therapeutic. These deficiencies provide the motivation for complementation with anaplerotic fuel. However, there are few anaplerotic precursors consumable in clinically sufficient quantities besides those that supply glucose. Five-carbon ketones, stemming from metabolism of the food supplement triheptanoin, are anaplerotic. Triheptanoin can favorably affect Glucose transporter type 1 deficiency (G1D), a carbon-deficiency encephalopathy. However, the triheptanoin constituent heptanoate can compete with ketogenic diet-derived octanoate for metabolism in animals. It can also fuel neoglucogenesis, thus preempting ketosis. These uncertainties can be further accentuated by individual variability in ketogenesis. Therefore, human investigation is essential. Consequently, we examined the compatibility of triheptanoin at maximum tolerable dose with the ketogenic diet in 10 G1D individuals using clinical and electroencephalographic analyses, glycemia, and four- and five-carbon ketosis. 4 of 8 of subjects with pre-triheptanoin beta-hydroxybutyrate levels greater than 2 mM demonstrated a significant reduction in ketosis after triheptanoin. Changes in this and the other measures allowed us to deem the two treatments compatible in the same number of individuals, or 50% of persons in significant beta-hydroxybutyrate ketosis. These results inform the development of individualized anaplerotic modifications to the ketogenic diet.

ClinicalTrials.gov registration NCT03301532, first registration: 04/10/2017.
Quantifiable peptide library bridges the gap for proteomics based biomarker discovery and validation on breast cancer
Authors: Kim Sung-Soo , Shin HyeonSeok , Ahn Kyung-Geun , Park Young-Min , Kwon Min-Chul , Lim Jae-Min , Oh Eun-Kyung , Kim Yumi , Han Seung-Man , Noh Dong-Young
Published: June 2023

Mass spectrometry (MS) based proteomics is widely used for biomarker discovery. However, often, most biomarker candidates from discovery are discarded during the validation processes. Such discrepancies between biomarker discovery and validation are caused by several factors, mainly due to the differences in analytical methodology and experimental conditions. Here, we generated a peptide library which allows discovery of biomarkers in the equal settings as the validation process, thereby making the transition from discovery to validation more robust and efficient. The peptide library initiated with a list of 3393 proteins detectable in the blood from public databases. For each protein, surrogate peptides favorable for detection in mass spectrometry was selected and synthesized. A total of 4683 synthesized peptides were spiked into neat serum and plasma samples to check their quantifiability in a 10 min liquid chromatography-MS/MS run time. This led to the PepQuant library, which is composed of 852 quantifiable peptides that cover 452 human blood proteins. Using the PepQuant library, we discovered 30 candidate biomarkers for breast cancer. Among the 30 candidates, nine biomarkers, FN1, VWF, PRG4, MMP9, CLU, PRDX6, PPBP, APOC1, and CHL1 were validated. By combining the quantification values of these markers, we generated a machine learning model predicting breast cancer, showing an average area under the curve of 0.9105 for the receiver operating characteristic curve.
Observed hydrological changes associated with active tectonic blocks before three consecutive earthquakes in Qinghai, China
Authors: Yu Huaizhong , Liu Lei , Ma Yuchuan , Yan Rui , Liu Jie , Ma Yawei , Li Zeping , Zhang Xiaotao , Zhao Jing , Yu Chen
Published: June 2023

In the past 2 years, three earthquakes of magnitude 6.0 and above occurred consecutively in Qinghai province, China, i.e., the 22 May 2021 Ms7.4 Maduo, 8 January 2022 Ms6.9 Menyuan, and 26 March 2022 Ms6.0 Delingha earthquakes. The hydrological observation instruments set up by the China Earthquake Administration allow us to study the dynamic processes in the well-aquifer systems during the establishment of criticality. Particularly, the observations played an important role in the prediction of the 8 January 2022 Ms6.9 Menyuan earthquake that was approved by the People’s Government of Qinghai province. This work presents the hydrological data recorded by 7 stations to show the short-term anomalies before these earthquakes. To explore the performance of the hydrological observations in detecting earthquakes that occurred on different active tectonic blocks, we calculate the relative amplitudes of the pre-seismic changes. Results indicate that markedly pre-seismic change is found if the observation station and the detection earthquake are on the same block, and moderate change is found if they are on the adjacent blocks, while the precursor is hard to be identified if they are on the separated blocks. The variations in the hydrological responses may be caused by the strength weakening (or dilatancy) of source media. And the increased volumes in the crust can be evidenced by the changes in the geodetic time series in the same neighborhoods and during the same period, augmenting stress loading between the blocks.
Interlayer angle control of the electronic mini-gaps, band splitting, and hybridization in graphene–WS2 moiré heterostructures
Authors: Hidalgo Francisco , Sánchez-Ochoa Francisco , Noguez Cecilia
Published: June 2023

Understanding the electronic properties modulation in graphene/tungsten disulfide (G-WS2) at different interlayer angles is essential for promising building blocks of two-dimensional (2D) heterostructures. G-WS2 heterostructures with four different interlayer angles are studied using periodic first-principles calculations and an unfolding method to decipher the supercell crowded-band structure. Electronic mini-gaps of different sizes, band splittings, and band hybridizations are identified because of the interactions between out-of-plane orbitals from both layers. These electronic changes are modulated depending on the interlayer angle in a given energy window and space region. At the same time, the replicas emerging because of the superperiodic potential associated with moiré patterns also modify such electronic alterations, inducing new electronic repulsions or avoided crossings. Therefore, the number of mini-gaps as well as their energy values and positions are intrinsically related to the interlayer angle. Finally, it is anticipated that these results might be essential for designing the electronic properties of 2D heterostructures.
Investigating the operation mechanism of light-emitting electrochemical cells through operando observations of spin states
Authors: Katsumata Junya , Osawa Fumiya , Sato Go , Sato Atsushi , Miwa Kazumoto , Ono Shimpei , Marumoto Kazuhiro
Published: June 2023

Light-emitting electrochemical cells (LECs) are next-generation devices that are flexible, emit light and have several advantages over organic light-emitting diodes, such as a simpler structure and lower cost. However, the operation mechanism of LECs remains unknown from a microscopic viewpoint. Here, we perform an operando microscopic investigation of LECs with Super Yellow, a typical light-emitting material, by observing the spin states of electrically doped charges using electron spin resonance. The operando electron spin resonance and light emission increase as the voltage applied to the LECs increases. Through density functional theory, we determine that the origin of the electron spin resonance increases to be from electrochemically doped holes and electrons in Super Yellow. We find that the doping progress correlates with the luminance increase, suggesting that electrochemically doped charges are distributed over the light-emitting layer as the operation mechanism. Moreover, we deduce the molecular orientation of electrochemically charge-doped Super Yellow.
Recent development of nanotechnology-empowered antigen assay methods for the control of infectious diseases
Authors: Peng Hongzhen , Fan Hongxuan , He Eric Zhengliang , Li Jiang
Published: June 2023

This feature article summarizes current immunological assay methods for the detection of infectious diseases, highlighting the trend of future development.
A fluorescence-based sweat test sensor in a proof-of-concept clinical study for COVID-19 screening diagnosis
Authors: Thaveesangsakulthai Isaya , Jongkhumkrong Jinnawat , Chatdarong Kaywalee , Torvorapanit Pattama , Sukbangnop Wannee , Sooksimuang Thanasat , Kulsing Chadin , Tomapatanaget Boosayarat
Published: June 2023

During the corona virus disease 2019 (COVID-19) pandemic period, rapid screening of covid-19 patients has been of great interest by developing a fluorescent sensor for complexation with nonanal, which is a marker for Covid-19 detection in sweat.
X-ray-responsive prodrugs and polymeric nanocarriers for multimodal cancer therapy
Authors: Cao Yufei , Si Jiale , Zheng Moujiang , Zhou Qinghao , Ge Zhishen
Published: June 2023

The recent advances in X-ray-activable prodrugs and polymeric nanocarriers are summarized to boost X-ray-based multimodal synergistic cancer therapy with reduced toxicity.
A rocking-chair aqueous aluminum-ion battery based on an organic/inorganic electrode
Authors: Yang Beibei , Wang Yongkang , Bian Haifeng , Zhang Yulin , Du Yanyan , Lu Hongbin , Bin Duan
Published: June 2023

A rocking-chair aqueous aluminum-ion battery based on a PBA inorganic cathode and PTO organic anode is reported for the first time.
Phosphine-based metal–organic layers to construct single-site heterogeneous catalysts for arene borylation
Authors: Chen Jiawei , Li Han , Wang Haoshang , Song Yuhang , Hong Qiming , Chang Kuan , Hu Huihui , Zhang Shuhong , Cao Lingyun , Wang Cheng
Published: June 2023

TPP-MOL with phosphine functionality was constructed for metalation with single-site Ir to catalyze C(sp2)–H borylation of arenes.
Boundary research between organic conductors and transistors: new trends for functional molecular crystals
Authors: Kadoya Tomofumi , Higashino Toshiki
Published: June 2023

This highlight article summarizes recent research trends of organic transistors and charge-transfer complexes/salts that are derived from organic semiconductors.
Influence of intramolecular dynamics on the relaxation spectra of simple liquids
Authors: Zeißler Rolf , Pabst Florian , Böhmer Till , Blochowicz Thomas
Published: June 2023

We observe bimodal structural relaxation peaks in relaxation spectra of ring-tail structured systems at temperatures above the melting point. Our results show that this bimodality occurs due to dynamic decoupling of the molecular subunits.
Molecular photodissociation dynamics revealed by Coulomb explosion imaging
Authors: Crane Stuart W. , Lee Jason W. L. , Ashfold Michael N. R. , Rolles Daniel
Published: June 2023

This Perspective illustrates the growing use of ultrafast laser induced Coulomb explosion imaging methods for tracking time-evolving molecular structures and advancing understanding of gas phase molecular fragmentation processes.
Correction: Automated assessment of redox potentials for dyes in dye-sensitized photoelectrochemical cells
Authors: Belić Jelena , Förster Arno , Menzel Jan Paul , Buda Francesco , Visscher Lucas
Published: June 2023

Correction for ‘Automated assessment of redox potentials for dyes in dye-sensitized photoelectrochemical cells’ by Jelena Belić et al., Phys. Chem. Chem. Phys., 2022, 24, 197–210, https://doi.org/10.1039/D1CP04218A.
Controlled preparation of CoNi2S4 nanorods derived from MOF-74 nanoarrays involving an exchange reaction for high energy density supercapacitors
Authors: Chen Qihang , Zhao Wenna , Huang Zihao , Li Guochang , Tao Kai , Han Lei
Published: June 2023

CoNi2S4 nanorods derived from MOF-74 nanoarrays is prepared and shows high specific capacitance and good cyclic stability, and the assembled ASC delivers a high energy density of 0.64 mW h cm−2 at a power density of 1.64 mW cm−2.
Synthesis, post-functionalization, and photoluminescence of contorted diazaphosphepine-based polycyclic aromatic heterocycles
Authors: Li Can , Yang Kai , Li Xinyu , Wen Shuya , Yu Na , Ren Yi
Published: June 2023

Diazaphosphepine-based polycyclic aromatic heterocycles were synthesized by mild and efficient phosphorus–nitrogen chemistry. Structural isomerization, central aryl rings, and P-environments had various impacts on their photophysical properties.
Vitrimerization of crosslinked elastomers: a mechanochemical approach for recycling thermoset polymers
Authors: Bandegi Alireza , Gray Thomas G. , Mitchell Sarah , Jamei Oskouei Amin , Sing Michelle K. , Kennedy Jayme , Miller McLoughlin Kimberly , Manas-Zloczower Ica
Published: June 2023

Recycling and reprocessing of crosslinked EVA through Vitrimerization.
Design, synthesis, and mechanistic study of 2-piperazineone-bearing peptidomimetics as novel HIV capsid modulators
Authors: Zhang Xujie , Sun Lin , Xu Shujing , Huang Tianguang , Zhao Fabao , Ding Dang , Liu Chuanfeng , Jiang Xiangyi , Tao Yucen , Kang Dongwei , De Clercq Erik , Pannecouque Christophe , Cocklin Simon , Dick Alexej , Liu Xinyong , Zhan Peng
Published: June 2023

We report the design, synthesis, and mechanistic study of a novel series of 2-piperazineone peptidomimetics as HIV capsid modulators by mimicking the structure of host factors binding to CA.
Defect engineering and atomic doping of porous Co-Ni2P nanosheet arrays for boosting electrocatalytic oxygen evolution
Authors: Wang Qiangqiang , Ma Hongmin , Ren Xiang , Sun Xu , Liu Xuejing , Wu Dan , Wei Qin
Published: June 2023

Electrochemical hydrogen production by splitting water is mainly limited to the oxygen evolution reaction (OER), which requires high energy consumption.
A palladium nanoparticle implanted polymer membrane for reusable dip-catalysis of diverse C–C and C–heteroatom (O/S/N) coupling reactions
Authors: Laxmi Raj , Behere Ravi Prakash , Manna Arunava , Kuila Biplab Kumar
Published: June 2023

A Pd nanoparticle deposited polymer membrane was employed as a heterogeneous catalyst for performing versatile C–C and C–heteroatom (O/S/N) cross coupling reactions.
An amorphous FeCoNiMnCr high-entropy alloy supported by 2H-MoS2 on carbon cloth as a highly efficient and robust electrocatalyst for water oxidation
Authors: Cao Weiwen , Yang Xuanyu , Dai Weiji , Wu Bing , Zhang Yudong , Zhao Cuijiao , Sui Yanwei , Huang Saifang
Published: June 2023

Novel electrocatalysts with amorphous FeCoNiMnCr HEA supported by 2H-MoS2 on carbon cloth (FeCoNiMnCr@MoS2-CC) have been designed for OER electrocatalysis. Due to the synergistic effects of FeCoNiMnCr and 2H-MoS2, the FeCoNiMnCr@MoS2-CC electrocatalysts show significantly enhanced electrocatalytic performance for the OER and good stability.
Rough Ni@MoN corals for the hydrogen evolution reaction in acidic and alkaline media
Authors: Zhang Yu , Zhang Baiqing , Liu Xiangcun , Yin Zhuoxun , Ma Xinzhi , Zhou Yang , Chen Wei , Li Jinlong , Xu Lingling
Published: June 2023

Ni@MoN catalysts were prepared by reducing NiMoO4 nanorods with urea at high temperatures. The resultant Ni@MoN-700 exhibits great HER activity, with a low overpotential of 30 mV and 76 mV at 10 mA cm−2 in alkaline and acidic media.
Mimicry of sorafenib: novel diarylureas as VEGFR2 inhibitors and apoptosis inducers in breast cancer
Authors: Ismail Magda M. F. , Husseiny Ebtehal M. , Ibrahim Mona H.
Published: June 2023

Thirteen diarylurea derivatives were designed and synthesized as sorafenib mimetics.
Water-based efficient alkyne transformation towards α-acetoxy/imido-ketones via oxidative coupling reactions using an alkylamine catalyst
Authors: Ghosh Debasish , Ganguly Aniruddha , Khamarui Saikat
Published: June 2023

The development of a fast and oxidative coupling cum difunctionalisation reaction enables the benign synthesis of valuable α-substituted ketones from alkynes, as well as the direct synthesis of the psychoactive drug cathinone.
Highly soluble bisurea derivatives for anion recognition
Authors: Mimuro Tsubasa , Yoshida Akihiro , Kamo Kazuyuki , Hirasawa Manabu , Kondo Shin-ichi
Published: June 2023

Bisurea derivatives linked with a flexible spacer showed high solubility and moderate recognition ability for anions and the prepared receptors can solubilise salts such as lithium chloride in organic solvents.
Novel salenCo(iii) photoinitiators and their application for cycloaddition of carbon dioxide
Authors: Chen Daoqing , Du LongChao , Yang Jie
Published: June 2023

Carbon dioxide (CO2) is a renewable carbon resource that can be effectively used in the production of polycarbonate (PPC) and cyclic carbonate (CPC) through open-loop copolymerization with epoxides and CO2.
Dynamic covalent self-assembly and self-sorting processes in the formation of imine-based macrocycles and macrobicyclic cages
Authors: Yang Zhaozheng , Esteve Ferran , Antheaume Cyril , Lehn Jean-Marie
Published: June 2023

The self-assembly of imine-based dynamic covalent architectures involves component selection and self-correction processes to generate homo-self-sorted outputs, even in dynamic constitutional networks of high complexity.
TiH2-supported Ru catalyst with unusual electron transfer behaviour for highly efficient carbon dioxide methanation at low temperature
Authors: He Zhujie , Huang Huanfeng , Chen Zhuodi , Liang Yuqian , Huang Zhixiang , Ning Shunlian , Tan Lilin , Barboiu Mihail , Wang Dawei , Su Cheng-Yong
Published: June 2023

TiH2-supported Ru catalysts are developed for CO2 methanation, in which the usual support-to-metal electron transfer behaviour and hydrogen spillover effect are regulated to balance CO intermediate activation, H2 activation and catalyst hydration.
Understanding the limits to short-range order suppression in many-component disordered rock salt lithium-ion cathode materials
Authors: Squires Alexander G. , Scanlon David O.
Published: June 2023

Exploring suppression of short-range order in many-component Li-ion disordered rock salt cathodes, we discover capacity enhancement is tightly linked to excess Li and fluorine content, directing improved compositional design.
A porphyrin-MOF-based integrated nanozyme system for catalytic cascades and light-enhanced synergistic amplification of cellular oxidative stress
Authors: Wei Yun-Jie , Li Jun , Hu Zu-E , Xing Xiu , Zhou Zi-Wen , Yu Yuan , Yu Xiao-Qi , Zhang Ji , Liu Yan-Hong , Wang Na
Published: June 2023

An integrated iron-porphyrin-MOF-based nanozyme composite named HGPF was constructed for the intracellular glucose-initiated catalytic oxidation cascades and light-enhanced generation of ROS, synergistically amplifying cellular oxidative stress.
Root system growth and development responses to elevated CO2: underlying signalling mechanisms and role in improving plant CO2 capture and soil C storage
Authors: Bach Liên , Gojon Alain
Published: June 2023

Carbon storage in soils is one of the most promising strategies for mitigating greenhouse gas emissions and the associated climate change. In this context, how plant root systems respond to the elevation of the atmospheric CO2 concentration is of crucial importance because these organs are the main source of C input into the soils. It is expected that root growth will be stimulated by elevated CO2 as a consequence of enhanced photosynthesis, and that this will favour belowground C sequestration. In addition, larger root systems with optimized architecture are also expected to improve water and nutrient acquisition by plants, and to indirectly stimulate photosynthetic CO2 capture. This review critically examines the evidence supporting these expectations from a molecular physiology perspective. We illustrate the strong but highly variable effects of elevated CO2 on root system size and architecture, and provide an update on the signalling mechanisms that may trigger these effects. This highlights the lack of knowledge on the physiological and genetic bases of the root growth and development response to elevated CO2, but shows that candidate genes and genetic resources are largely available to fill this gap.
A validated modeling strategy for piezoelectric MEMS loudspeakers including viscous effects
Authors: Hassanpour Guilvaiee Hamideh , Heyes Paul , Novotny Christian , Kaltenbacher Manfred , Toth Florian
Published: June 2023

Piezoelectric micro-electro-mechanical system (MEMS) loudspeakers are drawing more interest due to their applications in new-developing audio technologies. MEMS devices’ small dimensions necessitate including thermal and viscous effects in the surrounding air when simulating their behaviors. Thus, the linearized mass, momentum and energy conservation equations are used to describe these effects. These formulations are implemented in our open-source finite element program openCFS. In this article, we model a 3D piezoelectric MEMS loudspeaker in two configurations: open and closed back-volume, which behave differently due to the effects of air viscosity and pressure forces between the cantilever and the closed back-volume. Furthermore, using a customized vacuum chamber, the atmospheric pressure is varied and its effects are studied in these two configurations, numerically and experimentally. Experimental results prove that our model predicts the behavior of the piezoelectric MEMS loudspeaker in various configurations very well. Additional simulations illustrate the effect of the slit thickness and thermal losses.
Low carbon research of science and technology park in southern cities
Authors: Lü Wen , Fan Yubo , Yan Shi , Si Wenrong , Zhao Wenbin , Chai Yuan , Zhu Rui
Published: June 2023

Climate change is a major global issue of general concern to the international community. As a developing country focusing on environmental protection, China has adopted a series of relevant policies and measures to address global warming, namely, achieving carbon peak by 2030 and carbon neutrality by 2060. It can be said that carbon peaking is China's national policy to actively respond to climate change, and is also an independent commitment based on scientific demonstration; Carbon neutrality is an action goal based on China's national conditions and is also a long-term development strategy with a long-term vision. In order to realize the important long-term strategy of “carbon neutrality” at an early date, low-carbon buildings will gradually come into people's lives. This paper first analyzes the crisis and challenges we are facing under the background of the current era, and expounds how to solve the energy crisis. In this paper, we propose that green and low-carbon buildings will make a significant contribution to solving the problem of carbon pollution. Then, we studied the low carbon scheme of science and technology parks in southern cities through literature review, and case study. Next, taking the project of Block H01-01, Unit PDC1-0401, Lingang New Area of Shanghai Free Trade Zone as an example, we 、analyzed the technical characteristics of the project's climate responsive design and the integrated design of renewable energy buildings, and elaborated its project functions. While satisfying people's demands for scientific research and comfortable living, it also responded to the call of the national “double carbon” goal and completed the task of “strengthening building energy conservation and continuously improving building energy efficiency” in the key work of energy conservation, emission reduction and carbon reduction in Shanghai. Finally, it is concluded that green and low-carbon buildings can make outstanding contributions to the realization of “double carbon” goals in the future, and at the same time provide a more powerful guarantee for human living environment and quality of life.
Basic Study on Electrochemical Remediation of Heavy Metal Contaminated Water and Soil
Authors: Wang Wei , Dai Bo , Ding Shaobo
Published: June 2023

Heavy metal pollution of soil is one of the major environmental problems at this stage, and soil pollution itself has the characteristics of accumulation and irreversibility, which is difficult to completely recover from the root. Therefore, the research work on soil remediation technology and practice has become the main work content. The research progress in recent years includes physical remediation, chemical remediation, bioremediation, agricultural remediation and other models. It is also imperative to study its technical characteristics and application scope.
The impact of digital technology on water environmental participation: Analysis based on canton panel data
Authors: Wu Yongzhao , Wei Shicheng , Lin Yamin
Published: June 2023

With the help of the rapid development of information technologies, local governments in China have explored many new systems of promoting public participation in water governance aim to improve water quality and protection. One of the well-known systems that have been developed is called The Smart Water Management (SWM). Before finding out whether this system can boost the public participation and how effective the system is, it needs to figure out what the key variables play important roles in boosting the public participation. Focusing on the above questions, this paper employs the Ologit Model to carry out empirical research, which the author distributed 1400 questionnaires in Guangzhou, China, on the “Internet + River Chief System”. The research finds that the key variables are technology application cost, which can enhance 1.4 times chance to promote public participation, information participation channels, which can increase 34% of chances to boost public participation, and the technical means of access to information, which can increase 2.14 times of the probability to promote public participation. The research also finds that the political efficacy plays an intermediary role between SWM System application and public participation.
Occurrence and environmental risk assessment of 24 pharmaceuticals and personal care products in wastewater treatment plants in Jiangsu, China
Authors: Liu Yang , Ma Genchao , Song Ninghui
Published: June 2023

This study determined the occurrence, removal and environmental risk assessment of 24 multi-class pharmaceuticals and personal care products (PPCPs) in wastewater treatment plants (WWTPs) of Jiangsu Province, China. Solid phase extraction was used for pre-concentration of the samples with ultra-performance liquid chromatography coupled with tandem mass spectrometry analysis following. Results indicated that the maximum concentrations of the PPCPs varied between 2.15 ng/L and 6234 ng/L in influents and effluents. Quinolone antibiotics, macrolide antibiotics, cephalosporin antibiotics, lotions and other drugs were detected more commonly. Above the calculation of the risk quotient, clarithromycin and sulfamethoxazole showed high potential environmental risk for acute toxicity.
Research on Influencing Factors of Freezing and Thawing Process in the regions over 5000 m a.s.l
Authors: Man Zihao , Che Shengquan , Jiang Ruiyuan , Xie Changkun
Published: June 2023

The freezing and thawing process is a unique feature of the alpine permafrost ecosystem, which controls the growth of microorganisms and alpine meadows, and plays a vital role in animal husbandry development, ecosystem functions and services. Meanwhile, the freezing and thawing process is also affected by external environmental factors, and its spatial differences are very significant, especially in the regions over 5000 m a.s.l. In this study, the freezing and thawing process periods of the Cuoma Township (CM), Xiangmao Township (XM) and Xiaotanggula Mountain (XTGL) sites in the Nagqu River Basin are divided, the effects of altitude, vegetation coverage, air temperature, and organic matter content on the freezing and thawing process are analyzed, the main influencing factors are discussed. The results show that in the regions over 5000 m a.s.l, the thaw initiation period (TIP) starts in early April, the entirely thawed period (ETP) starts in end of May, the freeze initiation period (FIP) starts in end of October, and the entirely frozen period (EFP) starts in early November. Compared with the regions below 5000 m a.s.l, FIP and EFP in the regions over 5000 m a.s.l start earlier, the TIP starts later and the freezing rate is faster. Organic matter content is the main influencing factor during FIP and EFP, and air temperature is the main influencing factor during TIP and ETP. This study is helpful to clarify the changes of freezing and thawing process in the regions over 5000 m a.s.l, and also provides theoretical support for ecological protection and restoration.
Assessment of light pollution risk level
Authors: Du Xinyu , Xu Longqi , Zeng Hongyi
Published: June 2023

Artificial light has both positive and negative effects, affecting different sites in different ways. The level of light pollution is influenced by the level of local development, population, biodiversity, geography and climate. Therefore, it is important to assess the risk level of light pollution and to study the impact of different interventions to reduce light pollution in different locations. In this paper, four different types of representative locations in China were selected for calculation using the LPRL assessment model. Protected land locations have the lowest L1 values. Urban communities have the highest LPRL of L7. Rural and urban communities have LPRLs of L2 and L5, respectively. the results show that for rural communities, SI works best. It increased LPRL from L2 to L1. however, SII and SIII had no effect on LPRL. For urban communities, SIII had a significant effect in that it increased LPRL from L7 to L5. Therefore, it was necessary to focus on this aspect to develop the most effective intervention strategy for an urban community in Hangzhou, and a 1-page flyer was created to promote the strategy at this site.
DFT calculations of Cu doped TiO2 ferromagnetic study
Authors: Wu Biao , Wu Jiang
Published: June 2023

There is still some controversy about the room-temperature ferromagnetism generated by transition metal-doped TiO2 and its magnetic generation. In this paper, the samples with different doping ratio were prepared to verify the magnetism of doped TiO2, and then the geometry of copper-doped Ti16O32 supercell system was optimized by using the overall energy density function theory (DFT) and generalized gradient approximation (GGA). The results show that the doped energy band diagram shows electron self-selective cleavage near the Fermi energy level and the addition of Cu atoms does produce ferromagnetism. The magnitude of the induced magnetic moment is related to the distance of Cu atoms and oxygen vacancies. The system with a doped Cu-Cu distance of 3.82 A is more stable, and the ferromagnetism of the doped phase is more stable and lower 29 meV than the antiferromagnetic state in the absence of oxygen vacancies (Cu2Ti14O32), while a magnetic burst occurs in Cu2Ti14O30 after the formation of oxygen vacancies. Magnetic Cu-TiO2 may become a promising adsorbent to be applied in the field of pollutant control.
Research progress and application exploration of techniques to remove emerging contaminants from water environment
Authors: Lin Xiaohu , Fang Haifeng , Li Shiyi , Fu Shengjie , Zhang Baohua , Zhou Wenming , Xu Jingcheng , Huang Juwen
Published: June 2023

Emerging contaminants in water have attracted more and more attention from scholars and the public. Various technologies have been gradually studied and applied to remove emerging contaminants in water, including adsorption technology based on carbon materials, membrane separation technology, advanced oxidation technology and constructed wetland. In this paper, the research progress of these technologies is reviewed, especially for photocatalysis, a promising technology, which is analyzed in detail. Immobilization is an important means for photocatalytic technology to be applied in engineering. In this paper, four existing immobilization methods of photocatalytic materials are analyzed, and the existing research is prospected. More in-depth research is urgently needed, and exploratory research aimed at application is encouraged. This study can provide some ideas and reference for the treatment of emerging contaminants in water.
The Impact of Environmental Protection Investment on Provincial Carbon Emissions in China: Empirical Analysis Based on Two-way Fixed Effects Model
Authors: Guo Ruijin , Chen Yunru
Published: June 2023

In confront of global climate change, promoting carbon emission reduction and sustainable development has come to be acknowledged internationally. On the basis of panel data from 30 Chinese provinces from 2009 to 2020, this paper undertakes an empirical investigation into the connection between carbon emission intensity and investment in environmental protection. The findings demonstrate that investment in environmental protection has a nonlinear inverted U-shaped relationship with carbon emission intensity, that is, with the increase of environmental protection investment, its effect on carbon emission has changed from promoting to inhibiting. And the influence degree varied in different regions, with the influence in western and central regions being significantly stronger than that in eastern regions. The government should take full account of local conditions and formulate policies of environmental protection investment in accordance with local conditions.
An analysis of environmental awareness among Chinese higher education groups due to differences in different majors
Authors: Xue Peng , Wei Zhang , Yi Huang
Published: June 2023

In this study, the university students of Chongqing Three Gorges University as the main research object, through the questionnaire survey method to obtain empirical data, analyze the factors affecting the environmental protection consumption behavior of university students. College students are a relatively independent consumer group, we from the environmental protection consumption behavior, personal environmental protection attitude, environmental awareness of the concept of three aspects of their analysis, the study of all kinds of college students personal environmental awareness. Students of various major categories in Chongqing Three Gorges University were selected as research objects for data collection. SPSS software was used for reliability and validity of the data obtained, correlation analysis was used to analyze the relationship between variables, and students of different majors were filled in environmental conceptual papers, and the information after filling was datalized and analyzed by multidimensional scaling method. Therefore, it is concluded that we should strengthen the education of college students in environmental aspects, advocate the community, the school level to carry out environmental education activities, encourage college students to actively participate in, so as to improve their environmental awareness level in consumption, use green consumption to restrain their consumption behavior, so as to reduce the environmental problems caused by college students' consumption. At the same time, colleges and universities strive to build environmental education, so that environmental protection will deepen the environmental awareness of college students, and promote the development of environmental protection of the whole society, and finally achieve the goal of building environmental protection consumption of all employees.
Assessment of carbon emission potential of polyvinyl chloride plastics
Authors: Liang Quanwei , Yu Liming
Published: June 2023

Plastic pollution has become a global concern, and research has shown that carbon emissions during the lifecycle of plastics are rapidly consuming global carbon credits. This study focuses on the effective assessment of carbon emissions from polyvinyl chloride (PVC) plastics using a life cycle assessment (LCA) method during the production and recycling stages. The greenhouse gas emission potential is evaluated using 1kg PVC plastic as a functional unit. Research has shown that the total carbon emissions during the production stage of PVC plastic are 7.83kg CO2-eq. The carbon emissions during the production stage of hydrochloric acid, acetylene, electricity, and water vapor are 2.340 kg CO2-eq, 4.900 kg CO2-eq, 0.117 kg CO2-eq, and 0.468 kg CO2-eq, respectively. During the recycling phase, the carbon emissions from the power consumption zone are 0.184 kg CO2-eq, followed by 0.156 kg CO2-eq from natural gas. Research has shown that fossil materials contribute the largest carbon emissions during the production stage of PVC plastics. Therefore, how to effectively reduce the use of fossil fuels or seek alternative raw materials can effectively reduce carbon emissions.
Selection of Health Evaluation Indexes and Standards Analysis for Water-purifying Constructed Wetland
Authors: Yin Fei , Chen Xiaowei , Liu Hao , Jin Xin , Song Li
Published: June 2023

According to the construction requirements and structural characteristics of the water-purifying constructed wetland in Qiangwei Lake, this research clarifies the connotation of the constructed wetland's health, and analyzes the relevant factors affecting the operation effect of the wetland. Meanwhile, based on the principle of wetland health evaluation, this research applies the analytic hierarchy process to divide the health evaluation system of the water-purifying constructed wetland in Qiangwei Lake into the goal layer, the criterion layer, and the index layer. Furthermore, by selecting a host of evaluation indexes, encompassing water quality indexes, wetland structure, biodiversity, etc., this research discusses and establishes the corresponding index evaluation standard, ultimately constructing the comprehensive scoring system of the wetland.
Impact of COVID-19 on the Spatio-temporal Distribution of CO2 Emission
Authors: Han Yanxin
Published: June 2023

CO2 is the determining factor of global warming, affecting the intensity and rate of global warming. Although the outbreak of COVID-19 deeply affected the emission of global carbon, the impact on the temporal variation and spatial distribution of CO2 emission rate (ECO2 ) is not yet conclusive. This study systematically analyzed the spatial-temporal distribution of EC02 from 2019 to 2021 based on one latest near real-time CO2 dataset named GRACED. Studies show that COVID-19 has no significant impact on the spatial distribution of CO2 in the world, but significantly reduce the values. From the perspective of the seasonal cycle, the outbreak of COVID-19 caused a shift in the minimum ECO2 in 2020 from the Northern Hemisphere summer (JJA) to the Northern Hemisphere winter (MAM), reflecting the impact of the COVID-19 outbreak on global ECO2. As for the temporal variation, the impact of the COVID-19 outbreak on the monthly cycle mainly occurred in 2020, especially from March to June of that year. By 2021, the global mean values of E-C02 had largely recovered to 2019 levels as the impact of COVID-19 faded.
Root cause analysis of the Circular hole corrosion failure of N80 tubing
Authors: Zhang Shuxin , Yan Xi , Ma Chunli , Feng Jie , Wang Shuai
Published: June 2023

During well repair operations in an oil field, a Φ73.02 mm×5.51 mm N80 grade flat oil pipe with a circular hole was found. The depth of the well is between 550 meters to 2100 meters, with a usage cycle of 120 days. In order to figure out the root cause of the circular hole failure, a series of experiments were carried out. The chemical composition, yield strength, tensile strength, and elongation of the oil pipe meet the requirements of API SPEC 5CT-2018 standard. The microstructure of the oil pipe matrix consists of ferrite and pearlite, and there are no obvious cracks. The grain size of the material is all above 8.5 levels, and there are no coarse grains or non-metallic inclusions exceeding the standard. The perforation of the oil pipe is caused by internal corrosion, mainly due to CO2 corrosion and dissolved oxygen corrosion. The coexistence of Ca2+ and Mg2+ ions, iron bacteria, and corrosive bacteria in the wellbore fluid can lead to scale deposition inside the pipe, causing under-deposit corrosion, and the accelerating effect of Cl ions on corrosion ultimately leads to perforation of the pipe.
A green and economical weeds control agent suitable for drone
Authors: Liu Yao-Xi , Han Ying , Chen Zhuo , Liu Hui-Min , Feng Lu-Ying , Liu Yi-Teng , Wang Lin , Wuyun Ta-Na , Zhu Gao-Pu , Zhao Han
Published: June 2023

Weeds are one of the main factors affecting orchard yield, fruit quality and economic benefits. However, present methods have been lower effect and high labor intensity. To inhance the effect of weeds control on orchard, a new green and economic agent suitable for drone with choline chloride and eucalyptus oil as the main components was developed. Adopting optimized “3414” test design, the paper studied the prevention and control effect of this new weed control agent on 8 kinds of main weeds in the orchards of the Yellow-Huai Rivers. The results showed that T5 and T12 were significantly (P≤0.05) control the growth speed of 8 kinds of weeds, T4 was only inhibit the growth of Erigeron canadensis, Digitaria sanguinalis and Artemisia annua, T11 was only inhibit the growth of Tribulus terrestris, Humulus scandens and Cyperus rotundus, and T3 and T13 were promote the growth of weeds, which had the worst control effect among all treatments. Combined with the economic benefit analysis, the cost per 667m2 of weed control of T12 was 124 RMB, which was the most economical compared with manual weeding and mechanical weeding. Therefore, applying 30g choline chloride, 120 mL eucalyptus oil and 75g sucrose ester to each 667m2 is recommended to be popularized as a new green and economical weed control agent in the orchard production of the Yellow-Huai Rivers.
Research on Driving Factors of Low-Carbon Development in Fujian Province
Authors: Wei Qianqian , Jiang Qingquan , Lin Jinhuang
Published: June 2023

Based on the data related to carbon emissions in Fujian Province from 2000 to 2021, factor analysis and regression analysis were used to explore the key factors affecting low carbon development in Fujian Province. The results show that carbon emissions in Fujian Province are closely related to a variety of factors, including the consumption level of residents, international trade, urbanization, population size, fixed asset investment, energy intensity and economic development level, which have a relatively large impact on carbon emissions in Fujian Province, while the energy structure and industrial structure have a relatively small impact. Through the empirical analysis, we propose corresponding solutions to the current problems in order to promote the low-carbon development of Fujian Province.