检索结果-南通市图书馆

Carbon stock estimation in halophytic wooded savannas of uruguay:An ecosystem approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Forest Ecosystems 2024年第4期11卷 580-589页

作者： Andres Baietto Andres Hirigoyen carolina Toranza Franco schinato Maximiliano Gonzalez Rafael Navarro Cerrillo Forest Department Faculty of AgronomyUniversity of the RepublicMontevideoPO 12900Uruguay National Research Program of Forest Production National Agriculture Research InstituteTacuaremboPO 97000Uruguay soil and Water Department Faculty of AgronomyUniversity of the RepublicMontevideoPO 12900Uruguay Department of Forestry Engineering University of CordobaCordobaPO 14014Spain

savannas constitute a mixture of trees and shrub patches with a more continuous herbaceous *** contribution of this biome to the soil organic carbon(sOC)and above-ground biomass(AGB)carbon(C)stock globally is ***,they are frequently subjected to land use changes,promoting increases in CO_(2) *** uruguay,subtropical wooded savannas cover around 100,000 ha,of which approximately 28%is circumscribed to sodic soils(i.e.,subtropical halophytic wooded savannas).Nevertheless,there is little background about the contribution of each ecosystem component to the C stock as well as site-specific allometric *** study was conducted in 5 ha of subtropical halophytic wooded savannas of the national protected area Esteros y Algarrobales del Rio *** work aimed to estimate the contribution of the main ecosystem components(e.g.,soil,trees,shru.s.and herbaceous plants)to the C ***-specific allometric equations for the most frequent tree species and shrub genus were fitted based on basal diameter(BD)and total height(H).The fitted equations accounted for between 77%and 98%of the aerial biomass variance of Netuma affinis and Vachellia *** shrubs(Baccharis sp.),the adjusted equation accounted for 86%of total aerial biomass.C stock for the entire system was 116.71±11.07 Mg·ha^(-1),of which 90.7%was allocated in the soil,8.3.in the trees,0.8%in the herbaceous plants,and 0.2%in the *** results highlight the importance of subtropical halophytic wooded savannas as C sinks and their relevance in the mitigation of global warming under a climate change scenario.

关键词： Carbon stock Climate change Biomass modeling sodic soils

Human leukocyte antigen compatibility and incidence of donorspecific antibodies in pediatric liver transplant recipients

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第33期30卷 3837-3845页

作者： Melina u Melere Flavia H Feier Jorge Neumann Antônio N Kalil Juliana de M Montagner Luiza s Nader carolina s da silva Marco Aurélio F Junior Gabriela P Coral Guilherme P Bobsin Cristina T Ferreira Department of Hepatology and Liver Transplantation Santa Casa de Porto AlegrePorto Alegre 90050170Rio Grande do SulBrazil Department of Hepato-biliary-pancreatic surgery and Liver Transplantation Irmandade Santa Casa de Misericórdia de Porto AlegrePorto Alegre 90020-090Rio Grande do SulBrazil Postgraduation Program in Medicine:Hepatology Federal University of Health Sciences of Porto AlegrePorto Alegre 90050-170Rio Grande do SulBrazil Laboratory of Transplantation Immunology Irmandade Santa Casa de Misericórdia de Porto AlegrePorto Alegre 90020-090Rio Grande do SulBrazil

BACKGROuND Antibody-mediated rejection following liver transplantation(LT)has been increasingly recognized,particularly with respect to the emergence of de novo donor-specific antibodies(DsAs)and their impact on graft *** su.s.antial evidence for adult populations exists,research focusing on pediatric LT outcomes remains *** To investigate the prevalence of human leukocyte antigen(HLA)mismatches and DsA and evaluate their association with rejection episodes after pediatric *** A cohort of pediatric LT recipients underwent HLA testing at santa Casa de Porto Alegre,Brazil,between December 2013.and December *** patients who survived for>3. days after LT with at least one DsA analysis were *** classes I and II and cross-matches were *** presence of de novo DsA(dnDsA)was evaluated at least 3.months after LT using the Luminex®single antigen bead method,with a positive reaction threshold set at 1000 *** episodes were confirmed by liver *** Overall,67 transplanted children were analyzed;61 received grafts from living donors,85%of whom were related to ***-transplant DsA(class I or II)was detected in 28.3.of patients,and dnDsA was detected in 48.4%.The median time to DsA detection after LT was 19.7[interquartile range(IQR):4.3.3..6]*** rejection occurred in 13.patients at follow-up,with C4d positivity observed in 5/13.Liver *** median time to rejection was 7.8(IQR:5.7-12.8)*** presence of dnDsA was significantly associated with rejection(3.%vs 3.,Psurvival rates at 12 and 24 months were 76%vs 100%and 58%vs 95%for patients with dnDsA anti-DQ vs those without,*** Our findings highlight the importance of incorporating DsA assessment into pre-and post-transplantation protocols for pediatric LT *** implications may include immunosuppression minimization strategies based on this analysis in pediatric LT recip

关键词： Human leukocyte antigens Donor-specific antibodies Liver transplantation Pediatric Rejection

Endophytic Occupation in Nodules of Rhynchosia Plants from semiarid Regions of Argentina

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2024年第6期93卷 1081-1099页

作者： Cinthia T.Lucero María de los Á.Ruíz Fabiola Pagliero carolina Castaño Mariela L.Ambrosino Graciela s.Lorda Facultad de Ciencias Exactas y Naturales Universidad Nacional de La PampaRuta Nacional 35km 330Santa RosaLa PampaCP6300Argentina INTA EEA Anguil“Ing.Agr.Guillermo Covas”Ruta Nacional 5 km 580AnguilLa PampaCC116326Argentina

Beneﬁcial microbes can improve soil health by promoting soil structure,nutrient cycling,and disease *** addition,a wide array of rhizospheric microbes are responsible for producing metabolically active compounds including various types of plant growth ***,microbial biodiversity studies could contribute to the improvement of agricultural practices in deprived areas,such as the Pampean semiarid *** vast majority of studies conducted on endophytic microorganisms have focused on intensive crop legume *** contrast,little attention has been paid to microorganisms of native legumes,whose ecology is not directly affected by human *** this study,endophytic microorganisms isolated from root nodules of a selected native legume of the genus Rhynchosia were *** isolates were studied with a focus on their plant growth-pro-moting rhizobacteria(PGPR)*** the edaphic characteristics of the Pampean semiarid region,the isolates obtained were evaluated for their ability to grow under three salt stress conditions(50,100,and 200 mM NaCl)and four different pH values(6,7,8,and 9).Based on their PGPR activities,the selected strains were phylogenetically grouped using *** results showed great variability among the isolates in terms of the characteristics *** legumes manifested a wide endophytic variability and remarkable perfor-mance in PGPR *** conclude that they could be used as potential bioinoculants for legume cultivation,an excellent alternative to the use of chemical fertilizers that currently pollute the environment.

关键词： Native strains endophytes PGPR native legumes stress

Review of the Cretaceous avian diversity of Antarctica:a changing scenario for the evolution of early Neornithine birds

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Polar science 2024年第1期35卷 1-13页

作者： carolina ACOsTA HOsPITALECHE Facundo IRAZOQuI Paula BONA Ariana PAuLINA-CARABAJAL División Paleontología de Vertebrados Museo de La PlataFacultad de Ciencias Naturales y MuseoUniversidad Nacional de La PlataPaseo del Bosque s/nLa Plata B1900FWAArgentina Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET) Buenos Aires C1425FQBArgentina División Paleontología Vertebrados Museo de La Plata-Anexo ⅡFacultad de Ciencias Naturales y MuseoUniversidad Nacional de La PlataCalles 122 y 60La Plata B1900FWAArgentina Instituto de Investigaciones en Biodiversidad y Medioambiente(INIBIOMA) Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional del ComahueSan Carlos de Bariloche R8400GAMArgentina

The worldwide record of Cretaceous Neornithes and Neornithine-like birds is both controversial and poorly ***,in recent years,the Antarctic continent has yielded a su.s.antial number of Maastrichtian avian specimens,contributing significantly to our understanding of the early evolution of this ***,the keen interest and collaborative efforts of various paleornithologists have resulted in a wealth of knowledge,which we have thoroughly reviewed,updated,and discussed in the context of recent discoveries.

关键词： Maastrichtian Antarctic Peninsula Vega Island seymour(Marambio)Island Neornithes birds

Transcriptomic responses to drought stress in the Patagonian southern beech Nothofagus alpina

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2024年第2期13卷 192-203页

作者： Rita Maria Lopez Laphitz María Verónica Arana santiago Agustín Varela Leandro Aníbal Becker carolina soliani María Marta Azpilicueta Paula Marchelli Nicolás Bellora Instituto de Diversidad y Evolución Austral (CENPAT CONICET ) Instituto de Investigaciones Forestales y Agropecuarias Bariloche (IFAB INTA CONICET ) Instituto de Tecnologías Nucleares para la salud (CONICET )

Background Deciphering the genetic architecture of drought tolerance could allow the candidate genes identification responding to water stress. In the Andean Patagonian forest, the genus Nothofagus represents an ecologically relevant species to be included in different genomic studies. These studies are scarce in south American ecosystems however represent an important source of genomic data in order to interpret future climate-change environment scenarios of these emblematic forests. Here, we achieved the assemblage of the transcriptome of N. alpina while searching for key genes of activated or suppressed metabolic pathways in response to drought *** De novo transcriptome assembly resulted in 104,03. transcripts. Following confirmation of drought conditions, based on reduction of leaf water potential and stomatal conductance, a differential gene expression analysis resulted in 2720 significantly expressed genes(1601 up-regulated and 1119 down-regulated). Enrichment analysis(over-representation analysis and gene set enrichment analysis) resulted in more than one hundred stress-responsive term ontologies(i.e. biological processes) and pathways. Terms such as response to abscisic acid and pathways such as plant hormone signal transduction or starch and sucrose metabolism were over-represented. Protein–protein interaction assessment resulted in networks with significantly expressed top common hub gene clusters(e.g. planttype cell wall biogenesis among down-regulated or ABA-signalling among up-regulated). These networks evidenced important regulators at gene expression such as transcriptional *** Responses of N. alpina seedlings to drought stress were evidenced by the activation of several genes linked to GO biological processes and KEGG pathways, which were mainly based on over-expression of specific protein kinases, phosphatases, synthases and transcription factors. This suggests an up-regulation of signalling pathways, triggered through pla

关键词： Climate change Differential gene expression Hub genes Patagonia Temperate forest

Ornithine aspartate effects on bacterial composition and metabolic pathways in a rat model of steatotic liver disease

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Hepatology 2024年第5期16卷 832-842页

作者： Elisa carolina Lange Pabulo Henrique Rampelotto Larisse Longo Laura Bainy Rodrigues de Freitas carolina uribe-Cruz Mario Reis Alvares-da-silva Experimental Laboratory of Hepatology and Gastroenterology Hospital de Clínicas de Porto AlegrePorto Alegre 90035-007Brazil Graduate Program in Gastroenterology and Hepatology Universidade Federal do Rio Grande do SulPorto Alegre 90035-007Brazil Bioinformatics and Biostatistics Core Facility Universidade Federal do Rio Grande do SulPorto Alegre 91501-970Brazil Graduate Program in Biological sciences:Pharmacology and Therapeutics Universidade Federal do Rio Grande do SulPorto Alegre 90035-007Brazil Facultad de Ciencias de la salud Universidad Católica de las MisionesPosadasMisiones 3300Argentina Division of Gastroenterology Hospital de Clínicas de Porto AlegrePorto Alegre 90035-007RSBrazil Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq)researcher Brasília 71605-001Brazil

BACKGROuND Metabolic-dysfunction associated steatotic liver disease(MAsLD)is a hepatic manifestation of metabolic *** suggest ornithine aspartate(LOLA)as drug *** To analyze the influence of LOLA intake on gut microbiota using a nutritional model of *** Adult male sprague Dawley rats were randomized into three groups:Control(10 rats fed with a standard diet),MAsLD(10 rats fed with a high-fat and choline-deficient diet),and LOLA(10 rats receiving 200 mg/kg/d LOLA,after the 16th week receiving high-fat and choline-deficient diet).After 28 wk of the experiment,animals were euthanized,and feces present in the intestine were *** fecal DNA extraction,the V4 region of the 16s rRNA gene was amplified followed by sequencing in an Ion s5™*** Alpha and beta diversity metrics were comparable between MAsLD and LOLA.3.OTus were differentially abundant between MAsLD and LOLA,which belong to the species Helicobacter rodentium,Parabacteroides goldsteinii,and Parabacteroides *** functional prediction provided two different metabolic profiles between MAsLD and *** 9 pathways differentially abundant in MAsLD are related to a change in energy source,adenosine/purine nucleotides degradation as well as guanosine and adenosine deoxyribonucleotides *** 14 pathways differentially abundant in LOLA are associated with four major metabolic functions primarily influenced by L-aspartate,including tricarboxylic acid cycle pathways,purine/guanosine nucleotides biosynthesis,pyrimidine ribonucleotides biosynthesis and salvage as well as lipid IVA *** Although LOLA had no influence on alpha and beta diversity in this nutritional model of MAsLD,it was associated with changes in specific gut microbes and their related metabolic pathways.

关键词： Animal model Gut microbiota Metabolic-associated steatotic liver disease Metabolic prediction Ornithine aspartate

Relation of phospholipase A2-Ⅴ and indoxam to hippocampal neuronal death

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2006年第8期1卷 714-716页

作者： Fang Liu1,2, shi Wang1, Yan Lin1, Runhui Li1, Li Ma1, Yanjun Li1, Qing Jin1, Xiao Gong1, Yuhua Chen3.1Department of Neurology, Fengtian Hospital of shenyang Medical College, shenyang 110024, Liaoning Province, China 2south carolina university, sc,{3. 3.epartment of Development, China Medical university, shenyang 110024, Liaoning Province, China

BACKGROuND: Ⅴ secretory phospholipase A2 (sPLA2-Ⅴ) is abundant in many mammal tissues. However, it remains unknown whether sPLA2-Ⅴ causes biological or pathological response in central nervous system. OBJECTIVE: To observe the effect of phospholipase A2-Ⅴ (PLA2-Ⅴ) and its inhibitor (indoxam) on hippocampal neuron survival. DEsIGN: A repetitive measurement. sETTING: The Animal Center of south carolina university. MATERIALs: sprague-Dawley pregnancy day-7, 14, 21 female rats were selected; Reagents: sPLA2- Ⅴ and indoxam were obtained from the Dennis Research Laboratories METHODs: The experiment was finished at the animal center in south carolina university from January to December, 2004. 0, 12.5, 25, 50 and 100 μg/L sPLA2-Ⅴ were added to neuron with none-MgCl2 Eagle’s medium at 3. ℃, then changed to normal neuron culture medium after 3.hours. 1, 2.5, 5 and 10 μmol/L indoxam was added at 6 hou.s.after 100 μg/L sPLA2-Ⅴwas put to Day-21 sD rat hippocampal embryonic neurons with none-MgCl2 Eagle’s medium at 3. ℃. After 3.hours in the inhibition experiment, it was changed to normal neuron culture medium. The embryonic hippocampal neurons were primarily cultured, and the neuron survival ratio was detected with morphological method. MAIN OuTCOME MEAsuREs: survival ratio of hippocampal neurons. REsuLTs: ① Effects of sPLA2-Ⅴon neuron survival: When sPLA2-Ⅴ was 0, 12.5, 25, 50 and 100 μg/L, the neuron survival ratios in embryonic neurons of day-7 sD rats were (95.3.1.1)%, (81.4±3.1)%, (74.2±2.2)%, (62.4±1.7)% and (48.9±1.6)%, those in embryonic neurons of day-14 rats were (93.2±1.4)%, (74.3.1.9)%, (68.1±1.7)%, (56.1±1.4)% and (42.5±1.1)%, and those in embryonic neurons of day-21 rats were (91.2±1.2)%, (69.4±2.1)%, (60.3.2.2)%, (49.1±1.2)% and (3..5±1.9)%. There were significant differences among different concentrations (P s of indoxam on neuron survival: In case of sPLA2-Ⅴ 100 μg/L, the neuron survival ratios were (58.65±1.4)%, (69.3.±1.1)%, (82.11±1.2)% and (

关键词： and indoxam to hippocampal neuronal death Relation of phospholipase A2

Carbon dioxide enrichment affected flower numbers transiently and increased successful post-pollination development stably but without altering final acorn production in mature pedunculate oak (Quercus robur L.)

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2024年第4期35卷 1-12页

作者： Ryan McClory Richard H.Ellis Martin Lukac Jo Clark carolina Mayoral Kris M.Hart Andrew R.G.Plackett A.Rob MacKenzie school of Agriculture Policy and DevelopmentUniversity of ReadingAgricultureEarley GateWhiteknights RoadPO Box 237Reading RG66EUUK Faculty of Forestry and Wood sciences Czech University of Life Sciences PraguePrague 165000Czechia Future Trees Trust Harwell Innovation CentreBuilding 173Curie AvenueHarwellOxford OX110QGUK Birmingham Institute of Forest Research University of BirminghamEdgbastonBirmingham B152TTUK school of Biosciences University of BirminghamEdgbastonBirmingham B152TTUK school of Geography Earth and Environmental SciencesUniversity of BirminghamEdgbastonBirmingham B152TTUK

Acorn production in oak(Quercus spp.)shows considerable inter-annual variation,known as masting,which provides a natural defence against seed predators but a highly-variable supply of acorns for uses such as in commercial tree planting each *** emissions of greenhouse gases have been very widely reported to influence plant growth and seed or fruit size and quantity via the‘fertilisation effect’that leads to enhanced *** examine if acorn production in mature woodland communities will be affected by further increase in CO_(2),the contents of litter traps from a Free Air Carbon Enrichment(FACE)experiment in deciduous woodland in central England were analysed for numbers of flowers and acorns of pedunculate oak(Quercus robur L.)at different stages of development and their predation levels under ambient and elevated CO_(2) ***-annual variation in acorn numbers was considerable and cyclical between 2015 and 2021,with the greatest numbers of mature acorns in 2015,2017 and 2020 but almost none in *** numbers of flowers,enlarged cups,immature acorns,empty acorn cu.s.and galls in the litter traps also varied amongst years;comparatively high numbers of enlarged cups were recorded in 2018,suggesting *** at this site is a fruit maturation masting species(i.e.,the extent of abortion of pollinated flowers during acorn development affects mature acorn numbers greatly).Raising the atmospheric CO_(2) concentration by 150μL L^(−1),from early 2017,increased the numbers of immature acorns,and all acorn evidence(empty cups+immature acorns+mature acorns)detected in the litter traps compared to ambient controls by 2021,but did not consistently affect the numbers of flowers,enlarged cups,empty cups,or mature *** number of flowers in the elevated CO_(2) plots’litter traps was greater in 2018 than 2017,one year after CO_(2) enrichment began,whereas numbers declined in ambient *** with CO_(2) also increased the number o

关键词： Quercus robur L. Acorns Masting Pedunculate oak Carbon dioxide

Gastric fundoplication with endoscopic technique:A novel approach for gastroesophageal reflux disease treatment

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Endoscopy 2024年第10期16卷 557-565页

作者： Eyad Gadour Anna carolina Hoff Department of Gastroenterology and Hepatology King Abdulaziz Hospital-National GuardAhsa 31982Saudi Arabia Internal Medicine Zamzam University CollegeSchool of MedicineKhartoum 11113Sudan Bariatric Endoscopy Angioskope ClinicSão Josédos Campos 12243-680São PauloBrazil

BACKGROuND Gastric fundoplication with endoscopic technique(GFET)is an innovative approach to managing gastroesophageal reflux disease(GERD).This minimally invasive procedure utilizes the GEN-2 Apollo endosuture device and Olympus H2T180 gastroscope to perform partial fundoplication by strategically placing Prolene 2-0 sutures at the 11,7,5,1,and 3.o’clock positions around the gastroesophageal *** To evaluate whether GFET enhances the lower esophageal sphincter function by creating comprehensive plication to improve the barrier against *** This single-center prospective study included patients undergoing *** beginning GFET,pH metrics and subsequent manometric measurements were *** analysis of variance was performed to determine statistically significant differences between quality of life(QOL)and DeMeester scores at the time of the procedure and 6 and 12 months ***’sχ2 test was performed to identify statistically significant differences between categorical variables at the time of the procedure and 6 and 12 months *** Eighteen participants were enrolled(11 males and 7 females;mean age,3. years).More than 70%had an initial Hill grade of *** adverse event was recorded after the *** patient underwent valve reinforcement at 12 *** mean QOL score was markedly higher at the time of the procedure(3..9±4.0)compared to those at 6 and 12 months postoperatively(Pscores at 12 months were slightly higher than those at 6 *** highest mean QOL score was observed at the time of the procedure,followed by those at 6 and 12 months postoperatively(Psimilar trend was noted for the mean DeMeester scores(PusION GFET is a minimally invasive alternative to traditional surgical interventions and endoscopic techniques for managing *** research is warranted to validate its long-term efficacy and effectiveness over existing treatments.

关键词： Gastric fundoplication with endoscopic technique Gastroesophageal reflux disease Therapeutic endoscopy