keyword
https://read.qxmd.com/read/38530989/unraveling-the-activity-and-mechanism-of-tm-g-c-4-n-3-electrocatalysts-in-the-oxygen-reduction-reaction
#1
JOURNAL ARTICLE
Hao Deng, Dan Deng, Shang-Bin Jin, Zhihong Tian, Li-Ming Yang
In this work, a high-throughput screening strategy and density functional theory (DFT) are jointly employed to identify high-performance TM@g-C4 N3 (TM = 3d, 4d, 5d transition metals) single-atom catalysts (SACs) for the oxygen reduction reaction (ORR). Comprehensive studies demonstrated that Cu@, Zn@, and Ag@g-C4 N3 show high ORR catalytic activities under both acidic and alkaline conditions with favorable overpotentials (ηORR ) of 0.70, 0.89, and 0.89 V, respectively; among them, Cu@g-C4 N3 is the best candidate...
March 26, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38530919/oxidative-control-of-photoinduced-cascade-electrocyclizations-in-aromatic-azido-imines-to-access-complex-fused-imidazoles-or-pyrazoles
#2
JOURNAL ARTICLE
D Sai Reddy, Ivan M Novitskiy, Anastasia A Beloglazkina, Andrei G Kutateladze
Photoinduced cascade of two 6π-electron six- and five-center electrocyclizations in aromatic azido imines is oxidatively controlled to yield complex fused benzimidazoles or indazoles. Formation of benzimidazoles occurs via an unprecedented carbon-to-nitrogen o -iminoaryl 1,2-shift.
March 26, 2024: Organic Letters
https://read.qxmd.com/read/38530900/structural-and-mechanistic-basis-of-the-central-energy-converting-methyltransferase-complex-of-methanogenesis
#3
JOURNAL ARTICLE
Iram Aziz, Kanwal Kayastha, Susann Kaltwasser, Janet Vonck, Sonja Welsch, Bonnie J Murphy, Jörg Kahnt, Di Wu, Tristan Wagner, Seigo Shima, Ulrich Ermler
Methanogenic archaea inhabiting anaerobic environments play a crucial role in the global biogeochemical material cycle. The most universal electrogenic reaction of their methane-producing energy metabolism is catalyzed by N     5 -methyl-tetrahydromethanopterin: coenzyme M methyltransferase (MtrABCDEFGH), which couples the vectorial Na+ transport with a methyl transfer between the one-carbon carriers tetrahydromethanopterin and coenzyme M via a vitamin B12 derivative (cobamide) as prosthetic group...
April 2, 2024: Proceedings of the National Academy of Sciences of the United States of America
https://read.qxmd.com/read/38530899/phosphocholine-induced-energy-source-shift-alleviates-mitochondrial-dysfunction-in-lung-cells-caused-by-geospecific-pm-2-5-components
#4
JOURNAL ARTICLE
Yuanyuan Song, Yanhao Zhang, Lin Zhu, Yanyan Chen, Yi-Jie Chen, Zhitong Zhu, Jieqing Feng, Zenghua Qi, Jian Zhen Yu, Zhu Yang, Zongwei Cai
Fine particulate matter (PM2.5 ) is globally recognized for its adverse implications on human health. Yet, remain limited the individual contribution of particular PM2.5 components to its toxicity, especially considering regional disparities. Moreover, prevention solutions for PM2.5 -associated health effects are scarce. In the present study, we comprehensively characterized and compared the primary PM2.5 constituents and their altered metabolites from two locations: Taiyuan and Guangzhou. Analysis of year-long PM2...
April 2, 2024: Proceedings of the National Academy of Sciences of the United States of America
https://read.qxmd.com/read/38530845/differential-carbonic-anhydrase-activities-control-ebv-induced-b-cell-transformation-and-lytic-cycle-reactivation
#5
JOURNAL ARTICLE
Samaresh Malik, Joyanta Biswas, Purandar Sarkar, Subhadeep Nag, Chandrima Gain, Shatadru Ghosh Roy, Bireswar Bhattacharya, Dipanjan Ghosh, Abhik Saha
Epstein-Barr virus (EBV) contributes to ~1% of all human cancers including several B-cell neoplasms. A characteristic feature of EBV life cycle is its ability to transform metabolically quiescent B-lymphocytes into hyperproliferating B-cell blasts with the establishment of viral latency, while intermittent lytic cycle induction is necessary for the production of progeny virus. Our RNA-Seq analyses of both latently infected naïve B-lymphocytes and transformed B-lymphocytes upon lytic cycle replication indicate a contrasting expression pattern of a membrane-associated carbonic anhydrase isoform CA9, an essential component for maintaining cell acid-base homeostasis...
March 26, 2024: PLoS Pathogens
https://read.qxmd.com/read/38530767/one-carbon-to-rule-them-all-formaldehyde-is-a-one-carbon-signal-connecting-one-carbon-metabolism-and-epigenetic-methylation
#6
Logan Tenney, Vanha N Pham, Christopher J Chang
Formaldehyde is commonly thought of as an environmental toxin or laboratory fixation reagent, but there is a growing appreciation for its broader physiological contributions as a naturally generated one-carbon metabolite across all kingdoms of life. In this In Focus article, we summarize emerging advances in the field that show how formaldehyde plays diverse roles as a one-carbon signal in DNA damage, one-carbon metabolism, and epigenetic regulation.
March 26, 2024: ACS Chemical Biology
https://read.qxmd.com/read/38530754/lithium-grafted-si-doped-%C3%AE-graphyne-as-a-reversible-hydrogen-storage-host-material
#7
JOURNAL ARTICLE
Nidhi Duhan, T J Dhilip Kumar
In recent years, hydrogen (H2 ) has become the most sought-after sustainable energy carrier by virtue of its high energy content and carbon-free emission. The practical implementation of hydrogen as an alternative fuel calls for an efficient and secure storage medium. Within this framework, we have investigated Li-grafted Si-doped γ-graphyne for H2 storage applications by implementing the cutting-edge density functional theory (DFT). A dynamically and thermally stable Si-doped γ-graphyne (SiG) monolayer is functionalized with Li metal atoms that augmented the hydrogen binding strength of the nanolayer by almost three times, owing to the polarization effect of the Li atoms...
March 26, 2024: Physical Chemistry Chemical Physics: PCCP
https://read.qxmd.com/read/38530525/a-bibliometric-analysis-of-the-role-of-nanotechnology-in-dark-fermentative-biohydrogen-production
#8
REVIEW
Fakiha Tul Jannat, Kiran Aftab, Umme Kalsoom, Muhammad Ali Baig
Recently, nanoparticles have drawn a lot of interest as catalysts to enhance the effectiveness and output of biohydrogen generation processes. This review article provides a comprehensive bibliometric analysis of the significance of nanotechnology in dark fermentative biohydrogen production. The study examines the scientific literature from the database of The Web of Science© while the bibliometric investigation utilized VOSviewer© and Bibliometrix software tools to conduct the analysis. The findings revealed that a total of 232 articles focused on studying dark fermentation for hydrogen production throughout the entire duration...
March 26, 2024: Environmental Science and Pollution Research International
https://read.qxmd.com/read/38530523/paving-the-path-towards-carbon-neutrality-revealing-the-contribution-of-the-belt-and-road-initiative-in-mitigating-carbon-intensity
#9
JOURNAL ARTICLE
Keren Chen, Ruzhang Liu, Zhiang Chen
This study explores the crucial contribution of the "Belt and Road" Initiative (BRI) in diminishing carbon intensity and facilitating progress towards carbon neutrality, addressing the pressing global issue of climate change. Given its status as the world's foremost carbon emitter, China encounters significant pressure to alleviate its emissions. Launched in 2013, the BRI emphasizes economic development along its route while highlighting environmental protection in the regions involved. Despite extensive analyses of the BRI's economic impact, its environmental consequences have received insufficient attention, hindering a comprehensive evaluation of the initiative and obstructing the constructing of an environmentally optimal road...
March 26, 2024: Environmental Science and Pollution Research International
https://read.qxmd.com/read/38530489/phenol-biodegradation-using-bio-filter-tower-packed-column-with-immobilized-bacterial-consortium-a-batch-test-study
#10
JOURNAL ARTICLE
Preeti Sachan, Athar Hussain, Sangeeta Madan, Utkarsh Singh, Manjeeta Priyadarshi
The effluents from pulp and paper manufacturing industries contain high concentrations of phenol, which when discharged directly into surface water streams, increases the biological oxygen demand (BOD) and chemical oxygen demand (COD). In this study, two dominant bacteria SP-4 and SP-8 were isolated from the effluent emanating with a pulp and paper industry. The selected phenol-degrading isolates were identified as Staphylococcus sp. and Staphylococcus sciuri respectively by using nucleotide sequence alignment and phylogenetic analysis of 16 S rRNA regions of the genome...
March 26, 2024: Biodegradation
https://read.qxmd.com/read/38530488/isolation-identification-and-transcriptome-analysis-of-triadimefon-degrading-strain-enterobacter-hormaechei-ty18
#11
JOURNAL ARTICLE
Yan Wang, Qi Guan, Wenhui Jiao, Jiangbo Li, Rui Zhao, Xiqian Zhang, Weixin Fan, Chunwei Wang
Triadimefon, a type of triazole systemic fungicide, has been extensively used to control various fungal diseases. However, triadimefon could lead to severe environmental pollution, and even threatens human health. To eliminate triadimefon residues, a triadimefon-degrading bacterial strain TY18 was isolated from a long-term polluted site and was identified as Enterobacter hormaechei. Strain TY18 could grow well in a carbon salt medium with triadimefon as the sole nitrogen source, and could efficiently degrade triadimefon...
March 26, 2024: Biodegradation
https://read.qxmd.com/read/38530479/biodeterioration-of-polyethylene-by-bacillus-cereus-and-rhodococcus-equi-isolated-from-soil
#12
JOURNAL ARTICLE
Xinbei Liu, Xusheng Dong, Dandan Wang, Zhihong Xie
Polyethylene (PE), a non-biodegradable plastic, is widely used in agriculture as a mulch material, which causes serious plastic pollution when it is discarded. Recent studies have described the biodeterioration of PE by bacteria, but it is difficult for a single bacterial species to effectively degrade PE plastic. We isolated two strains with PE-degrading ability, Bacillus cereus (E1) and Rhodococcus equi (E3), from the soil attached to plastic waste on the south side of Mount Tai, China, using a medium with PE plastic as the only carbon source...
March 26, 2024: International Microbiology: the Official Journal of the Spanish Society for Microbiology
https://read.qxmd.com/read/38530475/geochemical-mineralogical-records-and-statistical-approaches-in-establishing-sedimentary-in-the-environment-of-a-mediterranean-coastal-system-case-of-sebkha-el-guettiate-southeastern-tunisia
#13
JOURNAL ARTICLE
Najia Bouabid, Feyda Srarfi, Hayet Mnasri, Mohamed Ali Tagorti
The current study was conducted within the context of the Holocene era in Sebkha El-Guettiate, located in southeastern Tunisia. The aim was to determine the factors influencing the geochemical and mineralogical composition of sediments and to elucidate the sedimentary characteristics of the Holocene within the Sebkha core. We examined a sediment core extending 100 cm from this Sebkha, subjecting it to comprehensive analysis to uncover its sedimentological, mineralogical, and geochemical properties. Several techniques were employed to strengthen and validate the connections between geochemical and mineralogical analyses, including X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), and infrared (IR) spectroscopy, among others...
March 26, 2024: Environmental Monitoring and Assessment
https://read.qxmd.com/read/38530416/cuco-2-o-4-nanoneedle-arrays-growth-on-carbon-cloth-as-a-non-enzymatic-electrochemical-sensor-with-low-detection-limit-ketoprofen-recognition
#14
JOURNAL ARTICLE
Yan Liu, Yuying Xin, Xin Wang, Xianfa Zhang, Yingming Xu, Xiaoli Cheng, Shan Gao, Lihua Huo
An electrochemical sensor for detecting ketoprofen was constructed by in-situ grown copper cobaltate (CuCo2 O4 ) nanoneedle arrays on a carbon cloth (CC) substrate. The resulting porous nanoneedle arrays not only expose numerous electrochemically active sites but also significantly enhance the electrochemical apparent active area and current transmission efficiency. By leveraging its electrochemical properties, the sensor achieves an impressive detection limit for ketoprofen of 0.7 pM, with a linear range spanning from 2 pM ~ 2 µM...
March 26, 2024: Mikrochimica Acta
https://read.qxmd.com/read/38530325/highly-efficient-electrosynthesis-of-glycine-over-an-atomically-dispersed-iron-catalyst
#15
JOURNAL ARTICLE
Yingying Cheng, Shiqiang Liu, Jiapeng Jiao, Meng Zhou, Yiyong Wang, Xueqing Xing, Zhongjun Chen, Xiaofu Sun, Qinggong Zhu, Qingli Qian, Congyang Wang, Huizhen Liu, Zhimin Liu, Xinchen Kang, Buxing Han
Glycine is a nonessential amino acid that plays a vital role in various biological activities. However, the conventional synthesis of glycine requires sophisticated procedures or toxic feedstocks. Herein, we report an electrochemical pathway for glycine synthesis via the reductive coupling of oxalic acid and nitrate or nitrogen oxides over atomically dispersed Fe-N-C catalysts. A glycine selectivity of 70.7% is achieved over Fe-N-C-700 at -1.0 V versus RHE. Synergy between the FeN3 C structure and pyrrolic nitrogen in Fe-N-C-700 facilitates the reduction of oxalic acid to glyoxylic acid, which is crucial for producing glyoxylic acid oxime and glycine, and the FeN3 C structure could reduce the energy barrier of *HOOCCH2 NH2 intermediate formation thus accelerating the glyoxylic acid oxime conversion to glycine...
March 26, 2024: Journal of the American Chemical Society
https://read.qxmd.com/read/38530289/carbohydrate-distribution-via-sweet17-is-critical-for-arabidopsis-inflorescence-branching-under-drought
#16
JOURNAL ARTICLE
Marzieh Valifard, Azkia Khan, Johannes Berg, Rozenn Le Hir, Benjamin Pommerrenig, H Ekkehard Neuhaus, Isabel Keller
Sugars Will Eventually be Exported Transporters (SWEETs) are the most recently discovered family of plant sugar transporters. By acting as uniporters, SWEETs facilitate the diffusion of sugars across cell membranes and play an important role in various physiological processes such as abiotic stress adaptation. AtSWEET17, a vacuolar fructose facilitator, was shown to be involved in the modulation of the root system during drought. In addition, previous studies have shown that overexpression of an apple homolog leads to increased drought tolerance in tomato plants...
March 26, 2024: Journal of Experimental Botany
https://read.qxmd.com/read/38530223/history-and-investigation-of-the-chemical-odors-and-explosion-in-the-university-avenue-sanitary-sewer
#17
JOURNAL ARTICLE
Adam Krajicek, Neil G Carlson, Caylin Crawford
During the summer of 2022, a fire and explosion occurred in a sanitary sewer tunnel adjacent to the University of Minnesota Twin Cities campus, propelling utility maintenance covers several meters into the air and jeopardizing the safety of the public and emergency responders. The investigation into the explosion highlighted the complex variables involved in the response to sanitary sewer events. This case study outlines current approaches and proposes recommendations for agencies to be better prepared to prevent, detect, and respond to sewer-related incidents in the future...
March 26, 2024: Journal of Occupational and Environmental Hygiene
https://read.qxmd.com/read/38530178/case-323-minute-pulmonary-meningothelial-like-nodules
#18
JOURNAL ARTICLE
Furkan Ufuk, Emel Kilicarslan, Ferda Bir, Goksel Altinisik
A 70-year-old woman with a 6-year history of asthma, a 12-year history of diabetes mellitus, and who did not smoke presented to the pulmonology clinic with dyspnea and cough. Chest CT performed 5 years earlier for similar symptoms revealed multiple pulmonary nodules. However, she was lost to follow-up before the work-up was concluded. Otherwise, her medical history was unremarkable. Family history included maternal endometrial cancer. Physical examination revealed partial oxygen saturation of 98%, respiratory rate of 18 breaths per minute, and heart rate of 77 beats per minute...
March 2024: Radiology
https://read.qxmd.com/read/38530116/gray-matter-atrophy-and-white-matter-lesions-burden-in-delayed-cognitive-decline-following-carbon-monoxide-poisoning
#19
JOURNAL ARTICLE
Yanli Zhang, Tianhong Wang, Shuaiwen Wang, Xin Zhuang, Jianlin Li, Shunlin Guo, Junqiang Lei
Gray matter (GM) atrophy and white matter (WM) lesions may contribute to cognitive decline in patients with delayed neurological sequelae (DNS) after carbon monoxide (CO) poisoning. However, there is currently a lack of evidence supporting this relationship. This study aimed to investigate the volume of GM, cortical thickness, and burden of WM lesions in 33 DNS patients with dementia, 24 DNS patients with mild cognitive impairment, and 51 healthy controls. Various methods, including voxel-based, deformation-based, surface-based, and atlas-based analyses, were used to examine GM structures...
April 2024: Human Brain Mapping
https://read.qxmd.com/read/38530085/tailored-yolk-shell-design-to-silicon-microparticles-via-scalable-and-template-free-synthesis-for-superior-lithium-storage
#20
JOURNAL ARTICLE
Hao Wu, Hong Wen, Chen Wang, Fenghui Li, Yifan Chen, Liwei Su, Lianbang Wang
Micrometer-sized Si particles are beneficial to practical lithium-ion batteries in regard to low cost and high volumetric energy density in comparison with nanostructured Si anodes. However, both the issues of electrical contact loss and overgrowth of solid electrolyte interface for microscale Si induced by colossal volume change still remain to be addressed. Herein, a scalable and template-free method is introduced to fabricate yolk-shell structured Si anode from commercially available Si microparticles. The void is created via a one-step alkali etching process with the remaining silicon core as the yolk, and a double-walled shell is formed from simultaneous in situ growth of the conformal native oxide layer and subsequent carbon coating...
March 26, 2024: Small
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