检索结果-南通市图书馆

The mechanisms of color production in black skin versus red skin on the heads of New World vultures

Avian Research 2023年第1期14卷 86-92页

作者： nicholas m.justyn matthew J.Powers Geoffrey E.Hill Kayla Alexander Adrián Naveda-Rodríguez Scott A.Rush Department of Biological Sciences Auburn UniversityAuburnALUSA College of Veterinary medicine Mississippi State UniversityMississippiStateMSUSA Department of Wildlife Fisheriesand AquacultureMississippi State UniversityMississippi StateMSUSA

A determination of how the color of animal integument is produced is a starting point for investigations into the function and evolution of *** mechanisms that give rise to the color of bare skin of New World vultures are largely ***,we investigate the source of color production in the bare skin of Turkey Vultures(Cathartes aura)and Black Vultures(Coragyps atratus).Using UV-vis reflectance spectroscopy,we found evidence that hemoglobin is the primary pigment responsible for the red coloration of the bare skin on the heads of Turkey Vultures,and that eumelanin is responsible for the black coloration of the bare skin on the heads of Black *** microscopy of incisional skin samples further supported these mechanisms of color production by revealing the presence of numerous blood vessels near the surface of the Turkey Vulture skin,and a high concentration of melanosomes in the skin of Black *** high performance liquid chromatography(HPLC),we detected carotenoids within the skin of both species with significantly higher total concentrations of carotenoids in the skin of Turkey Vultures compared to the skin of Black *** carotenoids detected were dietary carotenoids that typically produce yellow coloration when accumulated in integument and were present in low *** hypothesize that the dietary carotenoids present do not contribute to the color of the skin,but rather help to compensate for the lack of melanosomes found in Turkey Vulture *** presence of additional carotenoids may act as an antioxidant to minimize UV damage when the bare Turkey Vulture head skin is exposed to direct sunlight for prolonged periods of time when soaring and scavenging for food.

关键词： Carotenoids Cathartes aura Coragyps atratus Hemoglobin High performance liquid chromatography melanosomes Skin biopsies

来源：

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

Cell-type resolved transcriptomic approaches for dissecting selective vulnerability in neurodgeneration

引用

Neural Regeneration Research 2024年第7期19卷 1411-1413页

作者： Caleb A.Wood nicholas m.Tran Department of Neuroscience Baylor College of MedicineHoustonTXUSA Department of molecular and Human Genetics Baylor College of MedicineHoustonTXUSA

A common feature among neurodegenerative conditions is that ce rtain neuronal populations are selectively vulnerable to loss(Fu et al.,2018).By corollary,other neurons are selectively resilient,suggesting they may possess unique features that support their survival.U nderstanding the basis of neuronal resilience or vulnerability would provide a logical strategy to identify factors that could be targeted therapeutically.

关键词： selective targeted

来源：

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

Alcohol associated liver disease and bariatric surgery:Current perspectives and future directions

引用

World Journal of Gastrointestinal Surgery 2024年第3期16卷 650-657页

作者： Katherine m Cooper Alessandro Colletta nicholas Hebda Deepika Devuni Department of medicine UMass Chan Medical SchoolWorcesterMA 01655United States Division of Gastroenterology UMass Chan Medical SchoolWorcesterMA 01655United States

Bariatric surgery is a routinely performed procedure and is associated with a reduction in all-cause mortality in patients with ***,bariatric sur-gery has also been linked to increased alcohol use with up to 30%of these patients developing alcohol use disorder(AUD).The mechanism of AUD after bariatric surgery is multifactorial and includes anatomic,metabolic,and neurohumoral changes associated with post-surgical *** patients are at increased risk of alcohol associated liver disease and,in some cases,require liver *** this article,we provide a scoping review of epidemiology,patho-physiology,and clinical outcomes of alcohol-related health conditions after bariatric surgery.

关键词： Obesity medicine Alcohol use disorder Roux-en-Y gastric bypass Vertical sleeve gastrectomy Liver transplant Simultaneous liver transplant and bariatric surgery

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Recent advances in intermediate-temperature CO_(2) capture: materials,technologies and applications

引用

Journal of Energy Chemistry 2024年第3期90卷 435-452,I0010页

作者： Chengbo Zhao Leiming Wang Liang Huang nicholas m.musyoka Tianshan Xue Jabor Rabeah Qiang Wang Engineering Research Center for Water Pollution Source Control&Eco-remediation College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China State Key Laboratory of Efficient Production of Forest Resources Beijing Forestry UniversityBeijing 100083China China machinery Huanyu Certification and Inspection Co. Ltd.Beijing 102609China Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute University of Nottingham Ningbo ChinaNingbo 315100ZhejiangChina Institute of Atmospheric Environment Chinese Research Academy of Environmental SciencesBeijing 100012China Leibniz-Institut für Katalyse e.V. Albert-Einstein-Str.29aRostock D-18059Germany

Carbon capture,utilization and storage(CCUS) is widely recognized as a vital strategy for mitigating the impact of human induced climate *** various CO_(2) adsorbents,intermediate-temperature solid adsorbents have garnered significant attention due to their potential applications in hydrogen utilization,specifically in the water gas shift,steam reforming and gasification *** processes are crucial for achieving carbon *** laboratory-level studies have showcased the high adsorption capacity of these materials via various synthesis and modification methods,their practical application in complex industrial environments remains challenging,impeding the commercialization *** review aims to critically summarize the recent research progress made in intermediatetemperature(200-400℃) solid CO_(2) adsorbents,particularly focusing on indicators such as cyclability,gas selectivity,and formability,which play vital roles in industrial application ***,we provide an overview of laboratory-level advanced technologies specifically tailored for industrial ***,we highlight several industrial-ready advanced technologies that can pave the way for overcoming the challenges associated with large-scale *** insights provided by this review aim to assist researchers in identifying the most relevant research directions for industrial *** promoting advances in the application of solid adsorbents,we strive to facilitate the ultimate goal of achieving carbon neutrality.

关键词： Intermediate-temperature CO_(2) capture mgO LDHs Industrialization

来源：

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

morphological traits explain the individual position within resource-consumer networks of a Neotropical marsupial

引用

Current Zoology 2024年第4期70卷 453-464页

作者： nicholas F.de Camargo Hernani F.m.de Oliveira Juliana F.Ribeiro Amabilio J.A.de Camargo Emerson m.Vieira Laboratorio de Ecologia de Vertebrados Departamento de EcologiaInstituto de Ciencias BiologicasUniversidade de BrasiliaCP 04457BrasiliaDF70910-900Brazil Departamento de Zoologia Setor de Ciencias BiologicasUniversidade Federal do ParanaAvenida Coronel Francisco Heraclito dos Santos100CuritibaPR81531980Brazil Embrapa Cerrados Rodovia BR020km 18CP 08223PlanaltinaDE73310-970Brazil

Knowledge regarding the influence of individual traits on interaction patterns in nature can help understand the topological role of individuals within a network of intrapopulation *** tested hypotheses on the relationships between individuals'positions within networks(specialization and centrality)of 4 populations of the mouse opossum Gracilinanus agilis and their traits(i.e.,body length,body condition,tail length relative to body length,sex,reproductive condition,and botfly parasitism)and also seasonal effects in the Brazilian *** with lower body length,better body condition,and relatively shorter tail were more specialized(i.e.,less connected within the network).Individuals were also more specialized and less connected during the warm-wet *** relationship between individuals'position in the network and body traits,however,was independent of *** propose that specialization may arise not only as a result of preferred feed-ing strategies by more capable individuals(i.e.,those with better body condition and potentially prone to defend and access high-quality food resources)but alsobecause of morphological ***/younger individuals(consequently with less experience in foraging)and short-tailed individuals(less skilled to explore the vertical strata of the vegetation)would feed only on a subset of the available food resources and consequently become more ***,individuals are more specialized during the warm-wet season because of high competition(population-dense period)and higher ecological opportunities(resource-rich period).Therefore,our study reveals the relevance of individual traits inshaping interactionpatternsandspecialization inpopulations.

关键词： bodytraits centrality Cerrado Gracilinanus agilis seasonality specialization.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Review on laser directed energy deposited aluminum alloys

引用

International Journal of Extreme manufacturing 2024年第2期6卷 84-131页

作者： Tian-Shu Liu Peng Chen Feng Qiu Hong-Yu Yang nicholas Tan Yew Jin Youxiang Chew Di Wang Ruidi Li Qi-Chuan Jiang Chaolin Tan Singapore Institute of manufacturing Technology(SImTech) Agency for ScienceTechnology and Research(A∗STAR)5 Cleantech LoopSingapore 636732Singapore State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130025People’s Republic of China Key Laboratory of Automobile materials Ministry of Education and Department of Materials Science and EngineeringJilin UniversityChangchun 130025People’s Republic of China School of mechanical&Automotive Engineering South China University of TechnologyGuangzhou 510640People’s Republic of China State Key Laboratory of Powder metallurgy Central South UniversityChangsha 410083People’s Republic of China

Lightweight aluminum(Al)alloys have been widely used in frontier fields like aerospace and automotive industries,which attracts great interest in additive manufacturing(Am)to process high-value Al *** a mainstream Am technique,laser-directed energy deposition(LDED)shows good scalability to meet the requirements for large-format component manufacturing and ***,LDED Al alloys are highly challenging due to their inherent poor printability(*** laser absorption,high oxidation sensitivity and cracking tendency).To further promote the development of LDED high-performance Al alloys,this review offers a deep understanding of the challenges and strategies to improve printability in LDED Al *** porosity,cracking,distortion,inclusions,element evaporation and resultant inferior mechanical properties(worse than laser powder bed fusion)are the key challenges in LDED Al *** parameter optimizations,in-situ alloy design,reinforcing particle addition and field assistance are the efficient approaches to improving the printability and performance of LDED Al *** underlying correlations between processes,alloy innovation,characteristic microstructures,and achievable performances in LDED Al alloys are *** benchmark mechanical properties and primary strengthening mechanism of LDED Al alloys are *** review aims to provide a critical and in-depth evaluation of current progress in LDED Al *** opportunities and perspectives in LDED high-performance Al alloys are also outlined.

关键词： additive manufacturing laser directed energy deposition(LDED) aluminum alloys printability aluminum matrix composite auxiliary fields mechanical properties

来源：

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

Groupoid Approach to Ergodic Dynamical System of Commutative von Neumann Algebra

引用

Advances in Pure mathematics 2024年第3期14卷 167-184页

作者： nicholas O. Okeke murphy E. Egwe Physical and mathematical Sciences Dominican University Ibadan Nigeria Department of mathematics University of Ibadan Ibadan Nigeria

Given a compact and regular Hausdorff measure space (X, μ), with μ a Radon measure, it is known that the generalised space m(X) of all the positive Radon measures on X is isomorphic to the space of essentially bounded functions L∞(X, μ) on X. We confirm that the commutative von Neumann algebras m⊂B(H), with H=L2(X, μ), are unitary equivariant to the maximal ideals of the commutative algebra C(X). Subsequenly, we use the measure groupoid to formulate the algebraic and topological structures of the commutative algebra C(X) following its action on m(X) and define its representation and ergodic dynamical system on the commutative von Neumann algebras of m of B(H) .

关键词： measure Groupoid Groupoid Equivalence Ergodic Action Convolution Algebra von Neumann Algebra Generalized Space

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pleiotropic attenuating effect of Ginkgo biloba against isoprenalineinduced myocardial infarction via improving Bcl-2/mTOR/ERK1/2/Na^(+) , K^(+) -ATPase activities

引用

Chinese Herbal medicines 2024年第2期16卷 282-292页

作者： Jerome Ndudi Asiwe Abodunrin Adebayo Ojetola Nwoke Enekabokom Ekene Esthinsheen Osirim Anthony Chibuzor Nnamudi Benjamin Oritsemuelebi Jackson Erozueme Onuelu nicholas Asiwe Harrison Ogheneochuko Eruotor Saviour Inegbenehi Department of Physiology Delta State UniversityAbraka 1Nigeria Department of Physiology University of IbadanIbadan 3017Nigeria Department of Physiology Adeleke UniversityEde 250Nigeria Department of Pharmacology Rivers State UniversityNkpolu-Oroworukwo 5080Nigeria Department of Physiology Redeemer’s UniversityEde 230Nigeria Department of Biochemistry PAMO University of Medical SciencesPort Harcourt 500211Nigeria Department of Pharmacology Delta State UniversityAbraka 1Nigeria Department of Anatomy University of Port HarcourtChoba 5323Nigeria Department of medical Laboratory Sciences University of Port HarcourtChoba 5323Nigeria

Objective:myocardial infarction(mI)is linked to an imbalance in the supply and demand of blood oxygen in the heart ***-blockers and calcium antagonists are just two of the common medications used to treat ***,these have reportedly been shown to be either ineffective or to have undesirable side *** of Ginkgo biloba leaves(GBE),a Chinese herbal product offers special compatibility benefits in therapeutic settings relating to inflammatory diseases and oxidative *** order to better understand how GBE affects mI in rats insulted by isoprenaline(ISO),the current study was ***:The heart weight index,serum lipid profile,cardiac marker enzymes,endogenous antioxidants[catalase(CAT),superoxide dismutase(SOD),glutathione(GSH),nitrites and malondialdehyde(mDA)],inflammatory mediators[tumour necrosis factor alpha(TNF-a)and interleukin-6(IL-6)],immunohistochemical expressions of B-cell lymphoma factor-2(Bcl-2),extracellular signal-regulated kinase(ERK1/2),and mammalian target of rapamycin(mTOR)and histopathological analysis were used to assess the cardioprotective properties of ***:The findings showed that GBE effectively attenuated myocardial infarction by boosting the body’s natural antioxidant defense system and reducing the release of inflammatory cytokines as well as heart injury marker *** expression of Bcl-2,ERK1/2 and mTOR was increased while the histomorphological alterations were ***:The cardioprotective effects of GBE may be due to a mechanism involving increased Bcl-2/mTOR/ERK1/2/Na^(+),K^(+)-ATPase activity.

关键词： antioxidants extracellular signal-regulated kinase Ginkgo biloba extract isoprenaline mammalian target of rapamycin myocardial infarction Na^(+),K^(+)-ATPase

来源：

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

Teleseismic waves reveal anisotropic poroelastic response of wastewater disposal reservoir

引用

Earth and Planetary Physics 2021年第6期5卷 547-558页

作者： Andrew J Barbour nicholas m Beeler u.s.geological survey earthquake science centerusa

Connecting earthquake nucleation in basement rock to fluid injection in basal,sedimentary reservoirs,depends heavily on choices related to the poroelastic properties of the fluid-rock system,thermo-chemical effects *** constraints on these parameters outside of laboratory settings are rare,and it is commonly assumed that the rock layers are *** the Arbuckle wastewater disposal reservoir in Osage County,Oklahoma,high-frequency formation pressure changes and collocated broadband ground velocities measured during the passing of large teleseismic waves show a poroelastic response of the reservoir that is both azimuthally variable and anisotropic;this includes evidence of static shifts in pressure that presumably relate to changes in local *** azimuthal dependence in both the static response and shear coupling appears related to tectonic stress and strain indicators such as the orientations of the maximum horizontal stress and faults and *** dynamic strains from a nearby borehole strainmeter,we show that the ratio of shear to volumetric strain coupling is~0.41 which implies a mean Skempton's coefficient of A=0.24 over the plausible range of the undrained Poisson's *** these observations are made at relatively low confining pressure and differential stress,we suggest that the hydraulically conductive fracture network is a primary control on the coupling between pore pressure diffusion and elastic stresses in response to natural or anthropogenic sources.

关键词： poroelasticity dynamic strain anisotropy wastewater disposal Oklahoma induced seismicity

来源：

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

Predicting phosphorus sorption isotherm parameters in soil using data of routine laboratory tests

引用

Pedosphere 2021年第5期31卷 694-704页

作者： Kathleen S.DUNNE nicholas m.HOLDEN Karen DALY Teagasc Johnstown CastleEnvironmental Research CentreCo.Wexford Y35TC97(Ireland) UCD School of Biosystems and Food Engineering University College DublinBelfieldDublin 4 D04VIW8(Ireland)

Knowledge of phosphorus(P)sorption dynamics across different soil types could direct agronomic and environmental management of *** objective of this study was to predict P isotherm parameters for a national soil population using data of routine laboratory *** and Freundlich sorption parameters were calculated from two different ranges(0-25 and 0-50 mg P L^(-1))using an archive of representative agricultural soil types from *** linear regression(mLR)identified labile forms of aluminium(Al)and iron(Fe),organic matter(Om),cation exchange capacity(CEC),and clay as significant *** and Freundlich sorption capacities,Freundlich affinity constant,and Langmuir buffer capacity were predicted reliably,with R^(2) of independent validation>*** isotherm parameters were predicted from P sorbed at a single concentration of 50 mg P L^(-1)(S_(50)).An mLR prediction of P sorption maximum in the 0-50 mg P L-1 range was achieved,to an accurate standard,using S_(50),Om,and mehlich-3 Fe(R^(2) of independent calibration and validation being 0.91 and 0.95,respectively).Using Giles’four shapes of isotherms(C,L,H,and S),L non-strict-and C-shaped isotherm curves accounted for 64% and 27% of the soils,*** clustering identified a separation of isotherm curves influenced by two ranges of mehlich-3 *** with a low range of mehlich-3 Al(2.5-698 mg kg^(-1))had no incidence of rapid sorption(C shape).Single point indices,Al,or available soil data make the regression approach a feasible way of predicting Langmuir parameters that could be included with standard agronomic soil P testing.

关键词： available phosphorus binding fertilizer soil test sorption maximum

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：