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Response of gaseous carbon emissions to low-level salinity increase in tidal marsh ecosystem of the Min River estuary,southeastern China

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Journal of Environmental Sciences 2017年第2期29卷 210-222页

作者： Minjie Hu Hongchang Ren Peng Ren Jiabing Li benjamin J.wilson Chuan Tong School of Geographical Sciences Fujian Normal UniversityFuzhou 350007China Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education Fujian Normal UniversityFuzhou 350007China Research Centre of Wetlands in Subtropical Region Fujian Normal UniversityFuzhou 350007China School of Environmental Sciences Fujian Normal UniversityFuzhou 35000YChina Department of Biological Sciences Florida International UniversityMiamiFL 33199USA

Although estuarine tidal marshes are important contributors to the emission of greenhouse gases into the atmosphere, the relationship between carbon dioxide（CO2）, methane（CH4）emission, and environmental factors, with respect to estuarine marshes, has not been clarified thoroughly. This study investigated the crucial factors controlling the emission of CO2 and CH4from a freshwater marsh and a brackish marsh located in a subtropical estuary in southeastern China, as well as their magnitude. The duration of the study period was November 2013 to October 2014. Relevant to both the field and incubation experiments, the CO2 and CH4emissions from the two marshes showed pronounced seasonal variations. The CO2 and CH4emissions from both marshes demonstrated significant positive correlations with the air/soil temperature（p 〈 0.01）, but negative correlations with the soil electrical conductivity and the pore water/tide water Cl-and SO42- （p 〈 0.01）. The results indicate no significant difference in the CO2 emissions between the freshwater and brackish marshes in the subtropical estuary, whereas there was a difference in the CH4 emissions between the two sites（p 〈 0.01）. Although future sea-level rise and saltwater intrusion could reduce the CH4 emissions from the estuarine freshwater marshes, these factors had little effect on the CO2 emissions with respect to an increase in salinity of less than 5‰. The findings of this study could have important implications for estimating the global warming contributions of estuarine marshes along differing salinity gradients.

关键词： Greenhouse gases Salinity gradient Global warming Tidal marsh Min River estuary

Applying reticular synthesis to the design of Cu-based MOFs with mechanically interlocked linkers

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Nano Research 2021年第2期14卷 417-422页

作者： Alexander J.Stirk benjamin H.wilson Christopher A.O’Keefe Hazem Amame Kelong Zhu Robert W.Schurko Stephen J.Loeb Department of Chemistry and Biochemistry University of WindsorWindsorOntarioN9B 3B4Canada Department of Chemistry The University of JordanAmman11942Jordan School of Chemistry Sun Yat-Sen UniversityGuangzhou 510275China Department of Chemistry and Biochemistry Florida State UniversityTallahasseeFlorida 32306-4390USA

The concept of“robust dynamics”describes the incorporation of mechanically interlocked molecules(MIMs)into metal-organic framework(MOF)materials such that large amplitude motions(e.g.,rotation or translation of a macrocycle)can occur inside the free volume pore of the *** aid in the preparation of such materials,reticular synthesis was used herein to design rigid molecular building blocks with predetermined ordered structures starting from the well-known MOF *** linkers were synthesized that have a T-shape,based on a triphenylene tetra-carboxylate strut,and their incorporation into Cu(II)-based MOFs was *** single-crystal structures of three new MOFs,UWCM-12(fof),β-UWCM-13(loz),UWCM-14(lil),with naked T-shaped linkers were determined;β-UWCM-13 is the first reported example of the loz topology.A fourth MOF,UWDM-14(lil)is analogous to UWCM-14(lil)but contains a[2]rotaxane ***-temperature,^(2)H solid-state NMR was used to probe the dynamics of a 24-membered macrocycle threaded onto the MOF skeleton.

关键词： reticular chemistry metal-organic frameworks mechanically interlocked molecules rotaxane

Cyclic voltammetry and potentiodynamic polarization studies of chalcopyrite concentrate in glycine medium

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Transactions of Nonferrous Metals Society of China 2021年第2期31卷 545-554页

作者： Maryam KHEZRI Bahram REZAI Ali Akbar ABDOLLAHZADEH benjamin Pwilson Mehdi MOLAEINASAB Mari LUNDSTRÖM Department of Mining and Metallurgical Engineering Amirkabir University of Technology(Tehran Polytechnic)TehranIran Department of Mining Engineering University of KashanKashanIran Department of Chemical and Metallurgical Engineering(CMET) School of Chemical EngineeringAalto UniversityP.O.Box 16200EspooFinland Sarcheshmeh Copper Complex National Iranian Copper Industries CompanyRafsanjanIran

Cyclic voltammetry and potentiodynamic polarization analyses were utilized to investigate the mechanism and kinetics of glycine leaching reactions for *** effects of pH(9−12),temperature(30−90℃)and glycine concentration(0−2 mol/L)on corrosion current density,corrosion potential and cyclic voltammograms were investigated using chalcopyrite concentrate−carbon paste *** showed that an increase in the glycine concentration from 0 to 2 mol/L led to an increased oxidation peak current *** the same conditions,corrosion current density was found to change from approximately 28 to 89μA/cm2,whereas corrosion potential was decreased from−80 to−130 *** temperatures enhanced the measured current densities up to 60℃;however,above this level,current density was observed to decrease.A similar current density behavior was determined with pH.A pH change from 9 to 10.5 resulted in an increase in current density and pH higher than 10.5 gave rise to a reduced current *** addition,the thermodynamic stability of copper and iron oxides was found to increase at higher temperatures.

关键词： glycine corrosion current density corrosion potential electrochemical behaior chalcopyrite concentrate

Advanced Flexible Carbon‑Based Current Collector for Zinc Storage

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Advanced Fiber Materials 2022年第6期4卷 1500-1510页

作者： Hao Jia Minghui Qiu Chunxia Tang Hongqi Liu Jinlin Xu benjamin Tawiah Shou‑xiang Jiang Xiangwu Zhang Key Laboratory of Eco‑Textiles Ministry of EducationJiangnan UniversityWuxiJiangsuPeople’s Republic of China Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHong KongPeople’s Republic of China Department of Industrial Art(Textiles) Kwame Nkrumah University of Science and TechnologyKumasiGhana Fiber and Polymer Science Program Department of Textile EngineeringChemistry and ScienceWilson College of TextilesNorth Carolina State UniversityRaleighNC 27695‑8301USA

Carbon cloth(CC)-based electrodes have attracted extensive attention for next-generation wearable energy-storage devices due to their excellent electrical conductivity and mechanical ***,the application of conventional CC-based electrodes for zinc(Zn)storage severely hinders Zn ion transport and induces deleterious Zn dendrite growth,resulting in poor electrochemical ***,a novel oxygen plasma-treated carbon cloth(OPCC)is rationally designed as a current collector for flexible hybrid Zn ion supercapacitors(ZISs).The modified interface of OPCC with abundant oxygenated groups enables enhanced electrolyte wettability and uniform superficial electric field distribution.A prolonged working lifespan for Zn electrodeposition is achieved by the OPCC due to the improved interfacial kinetics and homogenized ion *** as-prepared hybrid ZIS also delivers excellent cycling endurance(98.5%capacity retention for 1500 cycles)with outstanding operation stability under various extreme *** facile surface modification strategy provides a new way for developing future flexible electrodes for wearable electronic products.

关键词： Zinc ion supercapacitor Carbon cloth Oxygen plasma treatment Interface kinetics

Endoscopic ultrasound guided liver biopsy: Recent evidence

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World Journal of Gastrointestinal Endoscopy 2020年第3期12卷 83-97页

作者： Kemmian D Johnson Passisd Laoveeravat Eric U Yee Abhilash Perisetti Ragesh Babu Thandassery benjamin Tharian Department of Internal Medicine Louisiana State University Health Sciences CenterNew OrleansLA 70112United States Department of Internal Medicine Texas Tech University Health Sciences CenterLubbockTX 79430United States Department of Pathology College of MedicineUniversity of Arkansas for Medical SciencesLittle RockAR 72205United States Department of Internal Medicine Division of GastroenterologyUniversity of Arkansas for Medical SciencesLittle RockAR 72205United States Department of Internal Medicine Division of GastroenterologyCentral Arkansas Veterans Health Care SystemLittle RockAR 72205United States

Liver biopsy(LB)is an essential tool in diagnosing,evaluating and managing various diseases of the *** such,histopathological results are critical as they establish or aid in diagnosis,provide information on prognosis,and guide the appropriate selection of medical therapy for *** for LB include evaluation of persistent elevation of liver chemistries of unclear etiology,diagnosis of chronic liver diseases such as wilson's disease,autoimmune hepatitis,small duct primary sclerosing cholangitis,work up of fever of unknown origin,amyloidosis and ***,methods of acquiring liver tissue have included percutaneous LB(PCLB),transjugular LB(TJLB)or biopsy taken surgically via laparotomy or ***,traditional methods of LB may be inferior to newer ***,PCLB and TJLB carry higher risks of adverse events and *** recently,endoscopic ultrasound guided LB(EUS-LB)has evolved as an alternative method of tissue sampling that has proven to be safe and effective,with limited adverse *** to PC and TJ routes,EUS-LB may also have a greater diagnostic yield of tissue,be superior for a targeted approach of focal lesions,provide higher quality images and allow for greater patient *** advantages have contributed to the increased use of EUS-LB as a technique for obtaining liver ***,we provide a review of the recent evidence of EUS-LB for liver disease.

关键词： Liver biopsy Percutaneous liver biopsy Transjugular liver biopsy Endoscopic ultrasound guided liver biopsy Fine-needle aspiration Core biopsy Fineneedle biopsy

Hyperhomocysteinemia: Risk Factors and Faster Onset of Degenerative Complications of Type 2 Diabetes in Brazzaville

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Journal of Diabetes Mellitus 2023年第3期13卷 257-267页

作者： Ikia Monde Valsy Russelh Evariste Bouenizabila Farel Elilie Mawa Ongoth Raissa Laure Mayanda Ohouna Aymande Okoumou-Moko Paulin Kibeke Ghislain Loubano-Voumbi Luc Magloire Boumba Anicet wilson Fabrice Ondongo Mayindou Kimbangu Archimède Gotran Tienelle Freiss Mabiala Wann Koumou Onanga Thierry Raoul Ngombea benjamin Longo Mbenza Edouard Ngou Milama Christian Andres Etienne Mokondjimobe Henri Germain Monabeka Biochemistry Laboratory Department University Hospital Center Brazzaville Republic of the Congo Faculty of Health Sciences Marien Ngouabi University Brazzaville Republic of the Congo Department of Metabolic and Endocrine Diseases University Hospital Brazzaville Republic of the Congo Pointe-Noire Research Area National Institute for Research in Health Sciences Pointe-Noire Republic of the Congo Department of Statistics Health Information and Epidemiological Surveillance Departmental Directorate of Health Care and Services Brazzaville Republic of the Congo Department of Public Health LOMO Research University Kinshasa Democratic Republic of the Congo Faculty of Medicine University of Health Sciences Libreville Gabon Department of Biochemistry and Molecular Biology Tours Regional University Hospital Tours France

Background: Type 2 diabetes (T2D) remains a major global public health problem. This complex metabolic disorder can lead to various complications, including cardiovascular diseases (leading cause of death) in T2D. Among the biochemical markers associated with increased risk for cardiovascular disease, homocysteine is currently one of the predictive markers under evaluation. We investigate the link between hyperhomocysteinemia and diabetes complications in DT2 population in Brazzaville. Methodology: We conducted a cross-sectional analytical study, from October to December 2022. One hundred and fifty participants were included, 100 patients T2D (34 with complications, 33 with comorbidities, 33 without), and 50 patients controls. Sociodemographic and clinical characteristics were collected. Homocysteine (Hcy) serum levels were measured using Sandwich ELISA method. Results: Study population was composed of 50% males and 50% females with sex ratio of 1;mean age was 52.2 ± 10.8 years (30 - 83). The prevalence of hyperhomocysteinemia (HHcy) was 36% (20% moderate Hcy, 15% intermediate and 1% severe). Mean Hcy concentration was 31.9 μmol/l (18 - 103). Age, gender and physical inactivity were strongly correlated to Hcy (OR of 3.5;9.4 and 3 respectively). Multivariate analysis showed that HHcy was a risk accelerator for degenerative complications (stroke: OR = 6.2;ischemic heart disease: 4.9;neuropathy: 9.2;retinopathy: 4.5 and peripheral arterial disease: 4.9). Conclusion: These findings suggest that hyperhomocysteinemia can be considered as a predictive marker to be taken into account in targeting cardiovascular risk in Congolese subjects with T2D.

关键词： Hyperhomocysteinemia Patients with T2D Risk Factor Acceleration Factor Degenerative Complications Congo

Potential factors influencing lymphatic filariasis transmission in"hotspot"and"control"areas in Ghana:the importance of vectors

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Infectious Diseases of Poverty 2019年第1期8卷 45-55页

作者： Sellase Pi-Bansa Joseph Harold Nyarko Osei Kwadwo Kyeremeh Frempong Elizabeth Elhassan Osei Kweku Akuoko David Agyemang Collins Ahorlu Maxwell Alexander Appawu benjamin Guibehi Koudou Michael David wilson Dziedzom Komi de Souza Samuel Kweku Dadzie Jurg Utzinger Daniel Adjei Boakye Swiss Tropical and Public Health Institute BaselSwitzerland University of Basel BaselSwitzerland Noguchi Memorial Institute for Medical Research College of Health SciencesUniversity of GhanaLegonGhana Department of Animal Biology and Conservation Science University of GhanaLegonGhana SightSavers International Ghana OfficeAccraGhana African Regional Postgraduate Programme in Insect Science University of GhanaLegonGhana Vector Biology Department Liverpool School of Tropical MedicineLiverpoolUK Centre Suisse de Recherches Scientifiques en Cote d'Ivoire AbidjanCote d'Ivoire

Background:Mass drug administration(MDA)programmes for the control of lymphatic filariasis in Ghana,have been ongoing in some endemic districts for 16 *** current study aimed to assess factors that govern the success of MDA programmes for breaking transmission of lymphatic filariasis in ***:The study was undertaken in two"hotspot"districts(Ahanta West and Kassena Nankana West)and two control districts(Mpohor and Bongo)in *** were collected and identified using morphological and molecular tools.A proportion of the cibarial armatures of each species was *** were performed onAnopheles gambiae for filarial worm detection.A questionnaire was administered to obtain information on MDA compliance and vector control *** were compared between districts to determine factors that might explain persistent transmission of lymphatic ***:High numbers of mosquitoes were sampled in Ahanta West district compared to Mpohor district(F=16.09,P=0.002).There was no significant difference between the numbers of mosquitoes collected in Kassena Nankana West and Bongo districts(F=2.16,P=0.185).Mansonia species were predominant in Ahanta West *** mosquitoes were prevalent in all *** with infected and infective filarial worms was found only in Ahanta West *** differences were found in cibarial teeth numbers and shape for mosquito species in the surveyed *** MDA coverage was high in all *** average use of bednet and indoor residual spraying was 82.4 and 66.2%,*** was high compliance in the five preceding MDA rounds in Ahanta West and Kassena Nankana West districts,both considered hotspots of lymphatic filariasis ***:The study on persistent transmission of lymphatic filariasis in the two areas in Ghana present information that shows the importance of local understanding of factors affecting control and elimination of lymphatic

关键词： Ghana Hotspots Lymphatic filariasis Mass drug administration Microfilariae Systematic non-compliance Vector control