检索结果-南通市图书馆

Colony contact contributes to the diversity of gut bacteria in bumblebees （Bombus terrestris）

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Insect Science 2017年第2期24卷 270-277页

作者： Annelies Billiet ivan Meeus Filip van Nieuwerburgh Dieter Deforce Felix Wackers Guy Smagghe Laboratory of Agrozoology Department of Crop Protection Faculty of Bioscience Engineering Ghent University B-9000 Ghent Laboratory of Pharmaceutical Biotechnology Faculty of Pharmaceutical Sciences Ghent University B-9000 Ghent BiobestNv B-2260 Westerlo Belgium

Social bees, like honeybees and bumblebees, have a close contact with nest mates of different developmental stages and generations. This could enhance bacterial transfer between nest mates and offers opportunities for direct transfer of symbionts from one generation to the next, resulting in a stable host specific gut microbiota. Gut sym- bionts of honeybees and bumblebees have been suggested to contribute in digestion and protection against parasites and pathogens. Here we studied the impact of contact with the bumblebee colony on the colonization potential of the bacterial families （i.e., Neisseri- aceae, Orbaceae, Lactobacillaceae and Bifidobacteriaceae） occurring in the gut of adult bumblebees （Bombus terrestris）. Bacterial profiles of the gut microbiota of B. terrestris were determined based on the hypervariable v4 region of the 16S rRNA using paired-end Illumina sequencing. In our experiments, we created different groups in which we grad- ually reduced the contact with nest mates and hive material. We made 3 observations：（i） reducing the contact between the colony and the bumblebee during adult life resulted in a significant drop in the relative abundance ofLactobacillus bombicola and Lactobacillus bombi; （ii） Bifidobacteriaceae required contact with nest mates to colonize the gut of B. terrestris and a significant lower bacterial diversity was observed in bumblebees that were completely excluded from colony contact during the adult life; （iii） Snodgrassella and Gilliamella were able to colonize the gut of the adult bumblebee without any direct contact with nest mates in the adult life stage. These results indicate the impact of the colony life on the diversity of the characteristic bumblebee gut bacteria.

关键词： bacterial transfer bumblebee gut Illumina sequencing microbiota social

Post-liver transplant biliary complications:Current knowledge and therapeutic advances

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Hepatology 2021年第1期13卷 66-79页

作者： Irina Boeva Petko ivanov Karagyozov ivan Tishkov Department of Interventional Gastroenterology Acibadem City Clinic Tokuda HospitalSofia 1407Bulgaria Department of Interventional Gastroenterology Clinic of GastroenterologyAcibadem City Clinic Tokuda HospitalSofia 1407Bulgaria

Liver transplantation is the current standard of care for end-stage liver disease and an accepted therapeutic option for acute liver failure and primary liver *** the remarkable advances in the surgical techniques and immunosuppressive therapy,the postoperative morbidity and mortality still remain high and the leading causes are biliary complications,which affect up to one quarter of *** most common biliary complications are anastomotic and non-anastomotic biliary strictures,leaks,bile duct stones,sludge and *** the absence of a recommended treatment algorithm many options are available,such as surgery,percutaneous techniques and interventional *** the last few years,endoscopic techniques have widely replaced the more aggressive percutaneous and surgical *** retrograde cholangiography is the preferred technique when duct-to-duct anastomosis has been ***,new devices and techniques have been developed and this has led to a remarkable increase in the success rate of minimally invasive *** the mechanisms of biliary complications helps in their early recognition which is the prerequisite for successful *** endoscopic therapy is essential for the reduction of morbidity and mortality in these *** article focuses on the common post-transplant biliary complications and the available interventional treatment modalities.

关键词： Post-transplant biliary complications Endoscopic retrograde cholangiopancreatography Cholangioscopy Percutaneous biliary interventions Liver transplantation Living-donor liver transplantation

Malignant insulinoma:Can we predict the long-term outcomes?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第16期10卷 5124-5132页

作者： Maja Cigrovski Berkovic Monika Ulamec Sonja Marinovic ivan Balen Anna Mrzljak Department of Endocrinology DiabetesMetabolism and Clinical PharmacologyClinical Hospital DubravaZagreb 10000Croatia Department of Kinesiological Anthropology and Methodology Faculty of KinesiologyUniversity of ZagrebZagreb 10000Croatia Department of Pathology and Cytology“Ljudevit Jurak” University Hospital Center“Sestre milosrdnice”Zagreb 10000Croatia Scientific Group for Research on Epigenetic Biomarkers and Department of Pathology School of MedicineUniversity of ZagrebZagreb 10000Croatia Laboratory for Personalized Medicine Division of Molecular MedicineRudjer Boskovic InstituteZagreb 10000Croatia Department of Gastroenterology and Endocrinology General Hospital“Dr.Josip Bencevic”Slavonski Brod 35000Croatia Department of Gastroenterology and Hepatology UHC ZagrebZagreb 10000Croatia School of Medicine University of ZagrebZagreb 10000Croatia

Insulinomas are the most frequent type of functional pancreatic neuroendocrine tumors with a variety of neuroglycopenic and autonomic symptoms and welldefined diagnostic criteria;however,prediction of their clinical behavior and early differentiation between benign and malignant lesions remain a *** comparative studies between benign and malignant cases are limited,suggesting that short clinical history,early hypoglycemia during fasting,high proinsulin,insulin,and C-peptide concentrations raise suspicion of ***,malignant tumors are larger with higher mitotic count and Ki-67 proliferative activity,but there are no accurate histological criteria to distinguish benign from malignant *** signaling pathways have been suggested to affect the pathophysiology and behavior of insulinomas;however,our knowledge is limited,urging a further understanding of molecular ***,there is a need for the identification of reliable markers of metastatic disease that could also serve as therapeutic targets in patients with malignant *** opinion review reflects on current gaps in diagnostic and clinical aspects related to the malignant behavior of insulinoma.

关键词： Pancreatic neuroendocrine tumor Malignant insulinoma Resection Liver Transplantation

First-principle calculations of magnetic properties of Ho_(6)(Fe,Mn)Bi_(2)compounds

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第11期43卷 6034-6047页

作者： Angel J.Garcia-Adeva Estibaliz Apinaniz Aritz Herrero ivan R.Aseguinolaza Alberto Oleaga Departamento de Fisica Aplicada Escuela de Ingenieria de V itoria-GasteizUniversidad del Pais V asco UPV/EHU01006 V itoria-GasteizSpain Departamento de Fisica Aplicada Escuela de Ingenieria de BilbaoUniversidad del Pais V asco UPV/EHU48013 BilbaoSpain

The magnetic properties of Ho_(6)MnBi_(2)and Ho_(6)FeBi_(2)crystals are investigated by means of density functional *** materials are currently an active subject of research in the context of magnetic refrigeration applications since they exhibit a remarkable magnetocaloric *** this work,the equation of state,density of states and magnetic moments are calculated and compared with previous experimental results for these ***,the Curie temperatures for the paramagnetic to ferromagnetic phase transition observed in these systems are calculated from first *** the calculated quantities are in reasonable agreement with experimental data,which suggests that density functional theory could provide a reliable framework to theoretically investigate the magnetic properties of intermetallic ternary compounds.

关键词： Intermetallic compounds Rare earths Magnetic properties Magnetocaloric effect Density functional theory Heisenberg model

Receptor for advanced glycation end-products axis and coronavirus disease 2019 in inflammatory bowel diseases:A dangerous liaison?

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2021年第19期27卷 2270-2280页

作者： Armando Rojas ivan Schneider Cristian Lindner Ileana Gonzalez Miguel Angel Morales Medicine Faculty Catholic University of MauleTalca 3634000Chile Department of Molecular and Clinical Pharmacology Program Institute of Biomedical SciencesUniversity of ChileSantiago 8320000Chile

Compelling evidence supports the crucial role of the receptor for advanced glycation end-products(RAGE)axis activation in many clinical *** the beginning of the coronavirus disease 2019 pandemic,there is an increasing concern about the risk and handling of severe acute respiratory syndrome coronavirus 2(SARS-Cov-2)infection in inflammatory gastrointestinal disorders,such as inflammatory bowel diseases(IBD).However,clinical data raised during pandemic suggests that IBD patients do not have an increased risk of contracting SARS-Cov-2 infection or develop a more severe course of *** the present review,we intend to highlight how two potentially important contributors to the inflammatory response to SARS-Cov-2 infection in IBD patients,the RAGE axis activation as well as the cross-talk with the renin-angiotensin system,are dampened by the high expression of soluble forms of both RAGE and the angiotensin-converting enzyme(ACE)*** soluble form of RAGE functions as a decoy for its ligands,and soluble ACE2 seems to be an additionally attenuating contributor to RAGE axis activation,particularly by avoiding the transactivation of the RAGE axis that can be produced by the virus-mediated imbalance of the ACE/angiotensin II/angiotensin II receptor type 1 pathway.

关键词： COvID-19 Inflammatory bowel diseases Advanced glycation Angiotensinconverting enzyme 2 Alarmins Receptor for advanced glycation end-products Receptor for advanced glycation end-products axis Inflammation

Surgical complications in COvID-19 patients in the setting of moderate to severe disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2021年第8期13卷 788-795页

作者： Milena Gulinac ivan P Novakov Svetozar Antovic Tsvetelina velikova Department of General and Clinical Pathology Medical UniversityUniversity Hospital"St George"Plovdiv 6000Bulgari Department of Thoraco-abdominal Surgery Medical UniversityPlovdiv 6000Bulgaria University Clinic for Digestive Surgery Medical FacultySkopje 1000Macedonia Department of Clinical Immunology University Hospital LozenetzSofia 1407Bulgaria Medical Faculty Sofia University St.Kliment OhridskiSofia 1407Bulgaria

The coronavirus disease 2019(COvID-19)pandemic has had a considerable impact on the work of physicians and *** connection between the patient and the surgeon cannot be replaced by *** example,the surgical staff faces more serious difficulties compared to non-surgical specialists during the COvID-19 *** primary concerns include the safest solutions for protecting healthcare staff and patients and the ability to provide adequate surgical ***,the adverse effects of any surgery delays and the financial consequences complicate the ***,patients’admission during the COvID-19 pandemic should be taken into consideration,as well as preoperative *** COvID-19 situation brings particular risk to patients during surgery,where preoperative morbidity and mortality rise in either asymptomatic or symptomatic COvID-19 *** review discusses the recent factors associated with surgical complications,mortality rates,outcomes,and experience in COvID-19 surgical patients.

关键词： COvID-19 SARS-Cov-2 Surgery Surgery complications Mortality rate Acute respiratory distress syndrome Thrombosis

Remote sensing of soil degradation:Pro gress andperspective

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Soil and Water Conservation Research 2023年第3期11卷 429-454页

作者： Jingzhe Wang Jianing Zhen Weifang Hu Songchao Chen ivan Lizaga Mojtaba Zeraatpisheh Xiaodong Yang School of Artificial Intelligence Shenzhen PolytechnicShenzhen518055China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun130102China Institute of Agricultural Resources and Environment Guangdong Academy of Agricultural SciencesGuangzhou510640China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou311200China Isotope Bioscience Laboratory-ISOFYS Department of Green Chemistry and TechnologyGhent UniversityCoupure Links 6539000GhentBelgium Rubenstein School of Environment and Natural Resources University of Vermont81 Carrigan DriveBurlingtonVT05405USA Gund Institute for Environment University of Vermont210 Colchester AveBurlingtonVT05401USA Department of Geography and Spatial Information Technology Ningbo UniversityNingbo315211China

Soils constitute one of the most critical natural resources and maintaining their health is vital for agricultural development and ecological sustainability,providing many essential ecosystem *** by climatic variations and anthropogenic activities,soil degradation has become a global issue that seriously threatens the ecological environment and food *** sensing(RS)technologies have been widely used to investigate soil degradation as it is highly efficient,time-saving,and *** review encompasses recent advances and the state-of-the-art of ground,proximal,and novel Rs techniques in soil degradation-related *** reviewed the RS-related indicators that could be used for monitoring soil degradation-related *** direct indicators(mineral composition,organic matter,surface roughness,and moisture content of soil)and indirect proxies(vegetation condition and land use/land cover change)for evaluating soil degradation were comprehensively *** results suggest that these above indicators are effective for monitoring soil degradation,however,no indicators system has been established for soil degradation monitoring to *** also discussed the RS's mechanisms,data,and methods for identifying specific soil degradation-related phenomena(e.g.,soil erosion,salinization,desertification,and contamination).We investigated the potential relations between soil degradation and Sustainable Development Goals(SDGs)and also discussed the challenges and prospective use of RS for assessing soil *** further advance and optimize technology,analysis and retrieval methods,we identify critical future research needs and directions:(1)multi-scale analysis of soil degradation;(2)availability of RS data;(3)soil degradation process modelling and prediction;(4)shared soil degradation dataset;(5)decision support systems;and(6)rehabilitation of degraded soil resource and the contribution of RS *** it is difficult to moni

关键词： Soil degradation Remote sensing Soil properties Earth observation Sustainable development goals

Resistance of LEDs Based on AIGalnP Heterostructures to Irradiation by Fast Neutrons

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Chemistry and Chemical Engineering 2013年第5期7卷 409-413页

作者： Gradoboev Alexander v Orlova Ksenia N. Asanov ivan A Yurga Technology Institute (Branch) Tomsk Polytechnic University Leningradskaya 652050 Yurga

The change of light output power of LEDs based on A1GalnP heterostructures with multiple quantum wells （590 nm and 630 nm） under irradiation by fast neutrons depends on the operating current density. It can be distinguished the regions of high, average and low electron injection. Operating current, this corresponds to the position of the boundary between the selected levels of the electron injection, increases with increasing neutron fluence. The final stage of the reducing process of the light output power under irradiation is the regime of low electron injection. The relative change in light output power depends on the operating current （operating current density） and can be described by a fairly simple equation. Established relations predict radiation resistance of LEDs, and it makes the most rational justification of operating modes of light-emitting diodes in terms of radiation resistance.

关键词： LEDs heterostructures AIGalnP quantum wells fast neutrons.

Mo/Fe bimetallic pyrophosphates derived from Prussian blue analogues for rapid electrocatalytic oxygen evolution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2023年第5期8卷 1450-1458页

作者： Jingyi Wang Jiajia Huang Siyu Zhao ivan PParkin Zhihong Tian Feili Lai Tianxi Liu Guanjie He School of Chemical Engineering Zhengzhou UniversityZhengzhou450001China Department of Chemistry University College LondonLondonWC1H 0AJUK School of Chemistry University of LincolnJoseph Banks LaboratoriesGreen LaneLincolnLN67DLUK Henan University Jinming AvenueKaifeng475001China Department of Chemistry KU LeuvenCelestijnenlaan 200FLeuven3001Belgium Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringInternational Joint Research Laboratory for Nano Energy CompositesJiangnan UniversityWuxi214122China

Efficient and stable oxygen evolution electrocatalysts are indispensable for industrial applications of water splitting and hydrogen ***,a simple and practical method was applied to fabricate(Mo,Fe)P2O7@NF electrocatalyst by directly growing Mo/Fe bimetallic pyrophosphate derived from Prussian blue analogues on three-dimensional porous current *** alkaline media,the developed material possesses good hydrophilic features and exhibits best-in-class oxygen evolution reaction(OER)***,the(Mo,Fe)P_(2)O_(7)@NF only requires overpotentials of 250 and 290 mv to deliver 100 and 600 mA cm^(-2)in 1 mol L^(-1)KOH,***,the(Mo,Fe)P_(2)O_(7)@NF shows outstanding performances in alkaline salty water and 1 mol L^(-1)high purity KOH.A worthwhile pathway is provided to combine bimetallic pyrophosphate with commercial Ni foam to form robust electrocatalysts for stable electrocatalytic OER,which has a positive impact on both hydrogen energy application and environmental restoration.

关键词： Oxygen evolution reaction Bimetallic pyrophosphate Heterostructure Self-supported electrocatalyst