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Electrobiocorrosion by microbes without outer-surface cytochromes

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mLife 2024年第1期3卷 110-118页

作者： Dawn E.holmes Trevor L.Woodard Jessica A.smith Florin Musat derek R.Lovley Department of Microbiology University of Massachusetts AmherstAmherstMassachusettsUSA Department of Physical and Biological Science Western New England UniversitySpringfieldMassachusettsUSA Department of Biomolecular Sciences Central Connecticut State UniversityNew BritainConnecticutUSA Department of Biology Section for MicrobiologyAarhus UniversityAarhusDenmark Department of Molecular Biology and Biotechnology Facuity of Biology and GeologyBabes-Bolyai UniversityCluj-NapocaRomania

Anaerobic microbial corrosion of iron-containing metals causes extensive economic *** microbes are capable of direct metal-to-microbe electron transfer(electrobiocorrosion),but the prevalence of electrobiocorrosion among diverse methanogens and acetogens is poorly understood because of a lack of tools for their genetic *** studies have suggested that respiration with 316L stainless steel as the electron donor is indicative of electrobiocorrosion,because,unlike pure Fe^(0),316L stainless steel does not abiotically generate h_(2) as an intermediary electron ***,we report that all of the methanogens(Methanosarcina vacuolata,Methanothrix soehngenii,and Methanobacterium strain IM1)and acetogens(Sporomusa ovata and Clostridium ljungdahli)evaluated respired with pure Fe^(0)as the electron donor,but only ***,***,and *** were capable of stainless steel *** electrobiocorrosive methanogens re-quired acetate as an additional energy source in order to produce methane from stainless *** of *** and *** demonstrated how acetogens can provide acetate to methanogens during *** only was Meth-anobacterium strain IM1 not capable of electrobiocorrosion,but it also did not accept electrons from Geobacter metal-lireducens,an effective electron-donating partner for direct interspecies electron transfer to all methanogens that can directly accept electrons from Fe^(0).The finding that ***,***,and *** are capable of electrobiocorrosion,despite a lack of the outer-surface c-type cytochromes previously found to be important in other electrobiocorrosive microbes,demonstrates that there are multiple microbial strategies for making electrical contact with Fe^(0).

关键词： acetogen corrosion Fe^(0) methanogen stainless steel

MXene-derived quantum dots based photocatalysts:Synthesis,application,prospects,and challenges

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Chinese Chemical Letters 2024年第6期35卷 123-133页

作者： hao Deng Yuxin hui Chao Zhang Qi Zhou Qiang Li hao Du derek hao Guoxiang Yang Qi Wang School of Environmental Science and Engineering Zhejiang Gongshang UniversityHangzhou 310018China Instrumental Analysis Center of Zhejiang Gongshang University Hangzhou 310018China Centre for Technology in Water and Wastewater(CTWW) School of Civil and Environmental EngineeringUniversity of Technology Sydney(UTS)UltimoNSW 2007Australia

In recent years,the emerging two-dimensional material-MXenes has attracted widespread attention in the field of photocatalysis due to its high conductivity,suitable Fermi level,tunable elemental composition,and excellent photoelectric *** zero-dimensional quantum dots(MQDs)derived from 2D MXenes not only inherit the characteristics of MXenes but also exhibit better performance due to the quantum size *** on the above excellent physical and chemical properties,MQDs are often used as co-catalysts of photocatalysts,and show excellent co-catalytic *** the same time,compared with other cocatalysts(precious metals,metal oxides,metal sulfides),it has the advantages of low cost and high ***,understanding the status of MQDs in the field of photocatalysis is crucial for their further *** this review,we summarized the synthesis and modification methods of MQDs in recent years,as well as their photocatalytic applications in h_(2) production,CO_(2) reduction,N_(2) fixation,pollutant degradation,and other *** addition,the challenges and prospects faced by MQDs are also proposed,providing theoretical guidance for the further development of MQD-based photocatalysts.

关键词： MXenes Quantum dots Photocatalysis Composites Environment purification

Associating liver partition and portal vein ligation for staged hepatectomy (ALPPS)-a fine balance

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hepatobiliary Surgery and Nutrition 2023年第2期12卷 269-271页

作者： Kai Tai derek Yeung Mikael h.Sodergren Department of Surgery and Cancer Imperial College LondonLondonUK

We read with interest the paper by Li et ***“Associating liver partition and portal vein ligation for staged hepatectomy versus sequential transarterial chemoembolization and portal vein embolization in staged hepate... 详细信息

关键词： hepatitis B virus(hBV) hepatocellular carcinoma(hCC) portal vein embolization(PVE) associating liver partition and portal vein ligation for staged hepatectomy(ALPPS)

Small moleculeπ-conjugated electron acceptor for highly enhanced photocatalytic nitrogen reduction of BiOBr

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Journal of Materials Science & Technology 2022年第14期109卷 276-281页

作者： derek hao Tianyi Ma Baohua Jia Yunxia Wei Xiaojuan Bai Wei Wei Bing-Jie Ni Centre for Technology in Water and Wastewater(CTWW) School of Civil and Environmental EngineeringUniversity of Technology Sydney(UTS)SydneyNSW 2007Australia Centre for Translational Atomaterials Faculty of ScienceEngineering and TechnologySwinburne University of TechnologyHawthornVIC 3122Australia College of Chemistry and Chemical Engineering Lanzhou City UniversityLanzhou 730070China Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control Beijing University of Civil Engineering and ArchitectureBeijing 102612China

Artificial ammonia synthesis using solar energy is of great significance as it can help narrow the gap to the zero-net emission ***,the current photocatalytic activity is generally too low for mass ***,we report a novel bismuth bromide oxide(BiOBr)-Tetracyanoquinodimethane(TCNQ)photocatalyst prepared via a facile self-assembly *** to the well-match band structure of TCNQ and Bi OBr,the separation and transfer of photogenerated electron-hole pairs were significantly *** importantly,the abundant delocalizedπelectrons of TCNQ,and the electron-withdrawing property of TNCQ made electrons efficiently accumulated on the catalysts,which can strengthen the adsorption and cleavage of nitrogen *** a result,the photocatalytic activity increased *** highest ammonia yield of the optimized sample reached 2.617 mg/(h gcat),which was 5.6-fold as that of pristine BiOBr and higher than the reported BiOBr-based *** isotope labeled^(15)N_(2)was used to confirm that the ammonia is formed form the fixation of N_(2).Meanwhile,the sample also had good *** 4-time usage,the photocatalysts still had about 81.8%as the fresh *** results of this work provide a new way for optimizing the electronic structure of photocatalysts to achieve highly efficient photochemical N_(2) reduction.

关键词： BiOBr TCNQ Nitrogen reduction Electron accepter Photocatalysis。

Dynamic analysis of heat extraction rate by supercritical carbon dioxide in fractured rock mass based on a thermal-hydraulic-mechanics coupled model

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International Journal of Mining Science and Technology 2022年第2期32卷 225-236页

作者： Chunguang Wang Xingkai Shi Wei Zhang derek Elsworth Guanglei Cui Shuqing Liu hongxu Wang Weiqiang Song Songtao hu Peng Zheng College of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao 266590China New-energy Development Center of Sinopec Shengli Oilfield Dongying 257001China Energy and Mineral Engineering and G3 Center Penn State UniversityUniversity ParkPA 16802USA Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines Northeastern UniversityShenyang 110004China Shandong Provincial Geo-Mineral Engineering Co. LtdJinan 250013China Qingdao Wofu New Energy Science and Technology Co. LtdQingdao 266010China

heat production from geothermal reservoirs is a typical heat transfer process involving a cold working fluid contacting a hot rock *** to the thermal-physical characteristics of water,supercritical CO_(2)(scCO_(2))has a higher heat storage capacity over a wide temperature-pressure range and may be favored as a heat transfer *** characteristic of scCO_(2)-based heat extraction is that the hydraulic-thermal properties of the scCO_(2) vary dramatically and dynamically with the spatial pressure gradient during unsteady-state flow along *** highly nonlinear behavior presents a challenge in the accurate estimation of heat extraction efficiency in scCO_(2)-based *** this paper,a thermal-h ydraulic-mechanical(ThM)coupled model is developed by considering deformation of the fractured reservoir,non-Darcy flow and the varying thermal-physical properties of scCO_(2).The proposed model is validated by matching the modeling temperature distribution with published *** results show that during continuous injection of scCO_(2),the fracture first widens and then narrows,ultimately reopening over the long *** sequential fracture deformation behaviors are in response to the combined impacts of mechanical compression and thermally-induced *** controlling the injection parameters of the scCO_(2),it is found that the heat extraction rate is positively correlated to its pore pressure or mass flow *** heat extraction rate can be significantly enhanced,when the inlet temperature of scCO_(2) is below its critical *** a result,the heat increment recovered per unit mass of scCO_(2) decreases as the hot rock is gradually ***,the heat increment recovered per unit mass of scCO_(2) decreases by increasing the inlet temperature of scCO_(2) or its mass flow rate,but increases as the outlet pressure ***,multi-linear regression indicates that controlling the inlet temperature of the scCO_(2) can sig

关键词： Supercritical CO_(2) heat extraction hot rock Geothermal energy Fracture-matrix interaction

Novel function of biguanides in inhibition of phospholipase D1 expression via a translational mechanism in cancer cells

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Genes & Diseases 2023年第5期10卷 1787-1790页

作者： Yuanfa Yao hanbing Li Xinyi Wang Yuanhai Sun Xuqin Zhao Weiwei Zha Jiaqiang Zhou derek Toomre Junfen Fu Yingke Xu Department of Endocrinology Children's Hospital of Zhejiang University School of MedicineNational Clinical Research Center for Children's HealthHangzhouZhejiang 310051China Department of Biomedical Engineering Key Laboratory of Biomedical Engineering of Ministry of EducationState Key Laboratory of Modern Optical InstrumentationZhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness AppraisalZhejiang UniversityHangzhouZhejiang 310027China Institute of Pharmacology College of Pharmaceutical ScienceZhejiang University of TechnologyHangzhouZhejiang 310014China Department of Endocrinology The Affiliated Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouZhejiang 310016China Department of Cell Biology Yale University School of MedicineNew HavenCT 06520USA Binjiang Institute of Zhejiang University HangzhouZhejiang 310053China

Phospholipase D(PLD)and its product phosphatidic acid(PA)function as pleiotropic factors in the regulation of cancer progression,which includes the promotion of cell growth,survival,cell migration,and angiogenesis.1 Chemical inhibition of the enzymatic activity of PLD1 and PLD2,or genetic down-regulation of their expression both induce tumor suppression,1 while the compounds for PLD expression inhibition are barely ***,we astonishingly found that the anti-hyperglycemic agents biguanides decreased PLD1 protein expression in cancer cells and further investigated its underlying regulatory mechanism.

关键词： cancer function translational

Injectable mechanical pillows for attenuation of load-induced post-traumatic osteoarthritis

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Regenerative Biomaterials 2019年第4期6卷 211-219页

作者： derek T.holyoak Tibra A.Wheeler Marjolein C.h.van der Meulen Ankur Singh Meinig School of Biomedical Engineering Cornell UniversityIthacaNY 14853USA Sibley School of Mechanical and Aerospace Engineering Cornell UniversityIthacaNY 14853USA Research Division Hospital for Special SurgeryNew YorkNY 10021USA Englander Institute for Precision Medicine Weill Cornell Medical CollegeCornell UniversityNew YorkNY 10021USA

Osteoarthritis(OA)of the knee joint is a degenerative disease initiated by mechanical stress that affects millions of *** disease manifests as joint damage and synovial ***-traumatic osteoarthritis(PTOA)is a specific form of OA caused by mechanical trauma to the *** progression of PTOA is prevented by immediate post-injury therapeutic ***-articular injection of anti-inflammatory therapeutics(***)is a common treatment option for OA before end-stage surgical ***,the efficacy of intra-articular injection is limited due to poor drug retention time in the joint space and the variable efficacy of ***,we endeavored to characterize a four-arm maleimide-functionalized polyethylene glycol(PEG-4MAL)hydrogel system as a‘mechanical pillow’to cushion the load-bearing joint,withstand repetitive loading and improve the efficacy of intra-articular injections of nanoparticles containing dexamethasone,an anti-inflammatory ***-4MAL hydrogels maintained their mechanical properties after physiologically relevant cyclic compression and released therapeutic payload in an on-demand manner under in vitro inflammatory ***,the on-demand hydrogels did not release nanoparticles under repetitive mechanical loading as experienced by daily *** dexamethasone had minimal protective effects on OA-like pathology in our studies,the PEG-4MAL hydrogel functioned as a mechanical pillow to protect the knee joint from cartilage degradation and inhibit osteophyte formation in an in vivo load-induced OA mouse model.

关键词： hydrogel osteophyte biomaterials drug delivery cartilage inflammation

The oceanic cycles of the transition metals and their isotopes

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Acta Geochimica 2017年第3期36卷 359-362页

作者： derek Vance Corey Archer Susan h.Little Michael Kobberich Gregory F.de Souza Department of Earth Sciences Institute of Geochemistry and Petrology ETH Zürich Clansiusstrasse 25 8092 Zürich Switzerland Department of Earth Science and Engineering Imperial College London South Kensington Campus Exhibition Road London SW7 2AZ UK

The stable isotope systems of the transition metals potentially provide constraints on the current and past operation of the biological pump,and on the state of ocean redox in Earth *** we focus on two exemplar metals,nickel(Ni)and zinc(Zn).The oceanic dissolved pool of both elements is isotopically heavier than the known inputs,implying an output with light isotope *** modern oceanic cycle of both these elements is dominated by biological uptake into photosynthesised organic matter and output to *** is increasingly clear,however,that such uptake is associated with only very minor isotope *** suggest that the isotopic balance is instead closed by the sequestration of light isotopes to sulphide in anoxic and organic-rich sediments,so that it is ocean chemistry that controls these isotope systems,and suggesting a different but equally interesting array of questions in Earth history that can be addressed with these systems.

关键词：稳定同位素海洋循环过渡金属氧化还原状态地球历史生物吸收同位素分馏同位素平衡

Desulfovibrio vulgaris as a model microbe for the study of corrosion under sulfate-reducing conditions

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mLife 2022年第1期1卷 13-20页

作者： Toshiyuki Ueki derek R.Lovley Key Laboratory for Anisotropy and Texture of Materials Ministry of EducationElectrobiomaterials InstituteNortheastern UniversityShenyangChina Department of Microbiology University of Massachusetts AmherstMAUSA.

Corrosion of iron-containing metals under sulfate-reducing conditions is an economically important *** strains now known as Desulfovibrio vulgaris served as the model microbes in many of the foundational studies that developed existing models for the corrosion of iron-containing metals under sulfate-reducing *** mechanisms for corrosion by *** include:(1)h2 consumption to accelerate the oxidation of Fe0 coupled to the reduction of protons to h2;(2)production of sulfide that combines with ferrous iron to form iron sulfide coatings that promote h2 production;(3)moribund cells release hydrogenases that catalyze Fe0 oxidation with the production of h2;(4)direct electron transfer from Fe0 to cells;and(5)flavins serving as an electron shuttle for electron transfer between Fe0 and *** demonstrated possibility of conducting transcriptomic and proteomic analysis of cells growing on metal surfaces suggests that similar studies on *** corrosion biofilms can aid in identifying proteins that play an important role in *** for making targeted gene deletions in *** are available for functional genetic *** approaches,coupled with instrumentation for the detection of low concentrations of h2,and proven techniques for evaluating putative electron shuttle function,are expected to make it possible to determine which of the proposed mechanisms for *** corrosion are most important.

关键词： corrosion Desulfovibrio electron shuttle extracellular electron transfer Fe0 oxidation hydrogenase hydrogen uptake sulfate reduction sulfide