检索结果-南通市图书馆

Large dinosaur egg accumulations and their significance for understanding nesting behaviour

Geoscience Frontiers 2024年第5期15卷 467-488页

作者： L.Ezquerro R.Coimbra B.Bauluz C.Núñez-Lahuerta T.Román-Berdiel m.moreno-Azanza Departamento de Geodinámica Estratigrafía y PaleontologíaFacultad de Ciencias GeológicasUniversidad Complutense de MadridC/JoséAntonio Novais1228040MadridSpain Aragosaurus-IUCA:Recursos Geológicos y Paleoambientales.Departamento de Ciencias de la Tierra.Facultad de Ciencias Universidad de ZaragozaC/Pedro Cerbuna 1250009 ZaragozaSpain museu da Lourinha LourinhaPortugal GeoBioTec Department of Earth SciencesNOVA School of Science and TechnologyUniversidade Nova de LisboaCaparicaPortugal GeoBioTec Departamento de GeocienciasUniversidade de AveiroAveiroPortugal Insitut Catalàde Paleoecologia Humana i EvolucióSocial(IPHES-CERCA) Zona Educacional 4Campus Sescelades URV(Edifici W3)43007 TarragonaSpain Departament d´Història i Història de l´Art Universitat Rovira i VirgiliAv.Catalunya 3543002 TarragonaSpain Geotransfer IUCA Departamento de Ciencias de La TierraFacultad de CienciasUniversidad de ZaragozaZaragozaSpain

The accurate identification of dinosaur egg accumulations as nests or clutches is crucial for understanding the reproductive behaviour of these extinct ***,existing methods often rely on the presence of complete eggs and embryo remains,and sedimentological criteria that are only applicable to well-structured *** this study,we introduce an innovative approach to characterize egg accumulations in structureless sediments,where traditional nest structures may not be *** methodology employs a unique combination of sedimentological,taphonomic,geochemical,and geophysical proxies for the study of egg *** applied this approach to the egg accumulation from Paimogo(Jurassic,Portugal),traditionally interpreted as a *** findings reveal that the Paimogo egg assemblage is a secondary deposit,resulting from a flooding event in a fluvial plain that dismantled several allosauroid and crocodylomorph *** eggshell vapor conductance results,coupled with sedimentological evidence,suggest that allosauroid dinosaurs buried their eggs in the dry terrain of overbank areas close to a main channel during the breeding season,likely during the dry season to prevent the embryos from *** research underscores the necessity of multidisciplinary approaches in interpreting egg accumulations and offers a novel methodology for studying these accumulations in structureless *** findings provide new insights into the breeding behaviour and nesting preferences of these extinct organisms,contributing to our understanding of dinosaur ecology.

关键词： Breeding behaviour Theropod Taphonomy Stable isotopes magnetic susceptibility Jurassic

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

多壁纳米碳管对磷酸铁锂正极材料热稳定性及表面形貌的影响(英文)

引用

新型炭材料 2013年第1期28卷 1-7页

作者： m.ria Filkusová Andrea Fedorková Renáta Oriňáková Andrej Oriňák Zuzana Nováková Lenka Skantárová Department of Physical and Theoretical Chemistry Faculty of Science Comenius University Mlynská|Dolina SK-842 15 Bratislava 4 Slovak Republic Department of Physical Chemistry Faculty of Science P.J. afárik University Moyzesova 11 SK-04154 Koice Slovak Republic Department of Electrical and Electronic Technology Faculty of Electrical Engineering and Communication Brno University of Technology Czech Republic Department of Analytical Chemistry Faculty of Science Comenius University Mlynská|Dolina SK-842 15 Bratislava 4 Slovak Republic

合成了一种新型的LiFePO4/多壁纳米碳管(mWCNTs)复合正极材料。通过mWCNTs和PPy-PEG粘结剂有机地在LiFePO4颗粒间构成三维网络导电结构,并借助SEm、TGA和高分辨裂解气相色谱,研究了LiFePO4-mWCNT正极材料的表面形貌和热稳定性。结果表明... 详细信息

合成了一种新型的LiFePO4/多壁纳米碳管(mWCNTs)复合正极材料。通过mWCNTs和PPy-PEG粘结剂有机地在LiFePO4颗粒间构成三维网络导电结构,并借助SEm、TGA和高分辨裂解气相色谱,研究了LiFePO4-mWCNT正极材料的表面形貌和热稳定性。结果表明,500℃下该材料的热分解程度非常小,说明mWCNTs和PPy-PEG的复合是提高LiFePO4正极材料的热稳定性和改善表面形貌的有效途径。

关键词：多壁纳米碳管多吡咯磷酸铁锂锂离子电池

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

Alleviated mucosal and neuronal damage in a rat model of Crohn's disease

引用

World Journal of Gastroenterology 2014年第44期20卷 16690-16697页

作者： Petra Talapka Lajos István Nagy Alexandra Pál marietta Zita Poles Anikó Berkó m.ria Bagyánszki László Géza Puskás éva Fekete Nikolett Bódi Department of Physiology Anatomy and Neuroscience Faculty of Sciences and Informatics University of Szeged Avidin Ltd.

AIm:To establish a rat model suitable to investigate the repetitive relapsing inflammations(RRI)characteristic to Crohn’s ***:Colitis was induced by 2,4,6-trinitrobenzenesulfonic acid(TNBS).RRI were mimicked by repeating administrations of *** samples were taken from control,once,twice and three times treated rats from the inflamed and adjacent non-inflamed colonic segments at different timepoints during the acute intestinal *** means of the ulcerated area were measured to evaluate the macroscopic mu-cosal *** density of myenteric neurons was determined on whole mounts by Hu C/Hu D *** oxygenase-1(HO-1)expression was evaluated by molecular biological ***:TNBS-treated rats displayed severe colitis,but the mortality was negligible,and an increase of body weight was characteristic throughout the experimental *** widespread loss of myenteric neurons,and marked but transient HO-1 up-regulation were demonstrated after the first TNBS *** repeated doses the length of the recovery time and extent of the ulcerous colonic segments were markedly decreased,and the neuronal loss was on a smaller scale and was limited to the inflamed ***-1 m RNA level was notably greater than after a single dose and overexpression was sustained throughout the timepoints ***,the HO-1protein up-regulation after the second TNBS treatment proved to be *** the third treatment HO-1 protein expression could not be ***:Experimentally provoked RRI may exert a protective preconditioning effect against the mucosal and neuronal *** persistent up-regulation of HO-1 m RNA expression may correlate with this.

关键词： Crohn's disease Experimental rat model Heme oxygenase-1 myenteric neurons Repetitive re-lapsing inflammation

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

Genoprotection and metabolic benefits of marine macroalgae-Insights into the concept of functional foods through direct and indirect consumption

引用

Food Bioscience 2022年第3期47卷 524-533页

作者： Ana marques João Ferreira Ana Cerqueda-Pacheco Vitória Pereira Helena Abreu Rui Pereira m.ria João Pires Fernanda Seixas Paula Oliveira Isabel Gaivão mário Pacheco Laboratory of Physiotoxicology CESAM-Centre for Environmental and Marine StudiesDepartment of BiologyUniversity of AveiroCampus Universitário de Santiago3810-193AveiroPortugal CECAV-Animal and Veterinary Research Center AL4AnimalsUniversity of Trás-os-Montes and Alto DouroQuinta de Prados5000-801Vila RealPortugal Department of Genetics and Biotechnology University of Trás-os-Montes and Alto DouroQuinta de Prados5000-801Vila RealPortugal Department of Biology and Environment University of Trás-os-Montes and Alto DouroQuinta de Prados5000-801Vila RealPortugal CITAB-Centre for the Research and Technology of Agro-Environmental and Biological Sciences Inov4AgroUniversity of Trás-os-Montes and Alto DouroQuinta de Prados5000-801Vila RealPortugal Department of Veterinary Sciences University of Trás-os-Montes and Alto DouroQuinta de Prados5000-801Vila RealPortugal ALGAplus Lda.Travessa Alexandre da Conceição s/n3830-196ÍlhavoPortugal

The consumption of marine macroalgae has been linked with health benefits,albeit some actions,including genoprotection,remain ***,we evaluated the genoprotective potential of a mixture of Ulva rigida,Fucus vesiculosus and Gracilaria gracilis,through direct consumption or via indirect intake using fish(Sparus aurata)as a vector of algal ***(mus musculus)were subjected to a 1-month dietary supplementation with 5%of macroalgae mix or 10%of fillet of fish previously fed with an algae-supplemented aquafeed(for comparison purposes,10%supplementation with fillet of fish standardly fed was also considered).Thereafter,mice were challenged by the genotoxicant methyl methanesulfonate(mmS),and the genetic damage was evaluated through the micronuclei ***,a wider evaluation was carried out encompassing the assessment of energy metabolism,haematological and histological parameters,as well as growth *** unequivocally protected against mmS-induced *** activity profile of hepatic lactate and isocitrate dehydrogenases promoted by the supplemented diets reflected an improved energy *** properties were not transferred via fish fed with the algae-supplemented aquafeed,though the transference of phytocomponents with beneficial properties(*** balance improvement)should not be ***,these findings highlighted the genoprotection afforded by marine macroalgae,likely promoted by desmutagenic factors,reinforcing their definition as functional *** possibility of using fish as an indirect source of algae-borne phytocomponents proved to be plausible and worthy of further investigations.

关键词： Antigenotoxicity Desmutagens Fish consumption Functional food marine macroalgae consumption metabolic benefits

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

Bone disorders in experimentally induced liver disease in growing rats

引用

World Journal of Gastroenterology 2005年第45期11卷 7169-7173页

作者： Viktória Ferencz Csaba Horváth Béla Kári János Gaál Szilvia mészáros Zsuzsanna Wolf Dalma Heged(?)s Andrea Horváth Anikó Folhoffer Ferenc Szalay 1st Department of Internal medicine Department of Diagnostic Radiology and Oncotherapy Department of Polymer Engineering and Textile Technology

AIm： To investigate the change of bone parameters in a new model of experimentally induced liver cirrhosis and hepatocellular carcinoma （HCC） in growing rats. mETHODS： Fischer-344 rats （n = 55） were used. Carbon tetrachloride （CCh）, phenobarbital （PB）, and a single diethylnitrosamine （DEN） injection were used. Animals were killed at wk 8 and 16. Bone mineral content, femoral length, cortical index （quotient of cortical thickness and whole diameter） and ultimate bending load （Fmax） of the femora were determined. The results in animals treated with DEN＋PB＋CCh （DPC, n = 21） were com- pared to those in untreated animals （UNT, n = 14） and in control group treated only with DEN＋PB （DP, n = 20）. RESULTS： Fatty liver and cirrhosis developed in each DPC-treated rat at wk 8 and HCC was presented at wk 16. No skeletal changes were found in this group at wk 8, but each parameter was lower （P〈0.05 for each） at wk 16 in comparison to the control group. Neither fatty liver nor cirrhosis was observed in DP-treated animals at any time point. Femoral length and Fmax values were higher （P〈0.05 for both） in DP-treated animals at wk 8 compared to the UNT controls. However, no difference was found at wk 16. CONCLUSION： Experimental liver cirrhosis and HCC are accompanied with inhibited skeletal growth, reduced bone mass, and decreased mechanical resistance in growing rats. Our results are in concordance withthe data of other studies using different animal models. A novel finding is the transiently accelerated skeletal growth and bone strength after a 8-wk long phenobarbital treatment following diethylnitrosamine injection.

关键词： Bone disorder Bone mineral content mechanical resistance Experimental liver cirrhosis Growingrat

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

Involvement of serum retinoids and Leiden mutation in patients with esophageal, gastric, liver, pancreatic, and colorectal cancers in Hungary

引用

World Journal of Gastroenterology 2005年第48期11卷 7646-7650页

作者： Gyula mózsik Gy(o|¨)rgy Rumi András D(o|¨)m(o|¨)t(o|¨)r m.ria Figler Beáta Gasztonyi El(?)d Papp Alajos Pár Gabriella Pár József Belágyi Zoltán matus Béla melegh Department of medicine Department of Human Clinical Nutrition and Dietetics Department of Bioanalysis Department of Biochemistry and medical Chemistry Department of medical Genetics and Child Development

AIm: To analyze the serum levels of retinoids and Leiden mutation in patients with esophageal, gastric, liver,pancreatic, and colorectal ***: The changes in serum levels of retinoids (vitamin A, α- and β-carotene, α- and β-cryptoxanthin,zeaxanthin, lutein) and Leiden mutation were measured by high liquid performance chromatography (HPLC)and polymerase chain reaction (PCR) in 107 patients (70 males/37 females) with esophageal (0/8), gastric (16/5), liver (8/7), pancreatic (6/4), and colorectal (30/21including 9 patients suffering from in situ colon cancer)cancer. Fifty-seven healthy subjects (in matched groups)for controls of serum retinoids and 600 healthy blood donors for Leiden mutation were ***: The serum levels of vitamin A and zeaxanthin were decreased significantly in all groups of patients with gastrointestinal (GI) tumors except for vitamin A in patients with pancreatic cancer. No changes were obtained in the serum levels of α- and β-carotene,α- and β-cryptoxanthin, zeaxanthin, lutein in patients with GI cancer. The prevalence of Leiden mutation significantly increased in all groups of patients with GI ***: Retinoids (as environmental factors)are decreased significantly with increased prevalence of Leiden mutation (as a genetic factor) in patients before the clinical manifestation of histologically different (planocellular and hepatocellular carcinoma, and adenocarcinoma) GI cancer.

关键词： Human gastrointestinal cancer Leiden mutation Retinoids Vitamin A Zeaxanthin

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

The Effect of Inorganic Nanoadditives on the Thermal, mechanical and UV Radiation Barrier Properties of Polypropylene Fibres

引用

Open Journal of Organic Polymer materials 2012年第2期2卷 29-37页

作者： Anna Ujhelyiová m.ria Slobodová Jozef Ryba Eberhard Borsig Petronela Vencelová Department of Fibres and Textile Chemistry Institute of Polymer Materials Faculty of Chemical and Food Technology Slovak University of Technology in Bratislava Slovakia

The objective of this study of modified polypropylene (PP) fibres using nanoadditives (nano-CaCO3 and Cloisite 30B) was to determine the influence of these additives on thermal and mechanical properties, but especially on the barrier properties of the nanocomposite fibres against UV radiation. The DSC data obtained from measurements of PP/CaCO3 or PP/C30B nanocomposite fibres were used for determination of the constants n and K of the Avrami equation and in the estimation of other thermal properties of the fibres, such as their crystallization half-time t1/2, rate of crystallization t1/2, the necessary time for maximum crystallization tmax and free energy per unit area of surface in the lamella perpen-dicular to the axis of a high-molecular chain se. The nano-CaCO3 or Closite 30B fillers (pre-treated separately in three different solvents: glycerine, acetone and water) did not influence the melting temperatures but caused an increase in PP crystallization temperatures in comparison with the pure PP fibres. The pre-treatments of nanoadditives resulted in increase of n, K, t1/2 values and decrease of t1/2, tmax as well as the values of free surface energies per unit area of the modified PP fibres. There was also observed a decrease in the mechanical properties, however, there was an increase of barrier properties against UV radiation of nanocomposite PP fibres in comparison with neat PP fibres, which was one of the main objectives of the study.

关键词： Polypropylene (PP) Fibres Nano-CaCO3 Cloisite 30B Kinetics of PP Crystallization Thermal mechanical and UV Radiation Barrier Properties

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

Novel agents and new therapeutic approaches for treatment of multiple myeloma

引用

World Journal of methodology 2014年第2期4卷 73-90页

作者： Roberto ria Antonia Reale Angelo Vacca Section of Internal medicine Department of Biomedical Sciences and Human On-cologyUniversity of Bari Medical SchoolI-70124 BariItaly

This review summarizes the therapeutic strategies and the drugs actually in development for the management of myeloma patients. multiple myeloma is caused by the expansion of monoclonal plasma cells and secretion of m-protein(immunoglobulins, Bence Jones protein and free light chains). multiple myeloma still remains an incurable disease with a high incidence rate in the elderly, despite the introduction of several new therapeutic agents(bortezomib, lenalidomide and thalidomide) which have changed its natural history. The high heterogeneity of this disease leads to large differences in clinical responses to treatments. Thus, the choice of the best treatment is a difficult issue. However, the introduction of new drugs has made it possible to achieve high response rates and good quality respons-es with long-term disease control. Interactions between tumor cells and their bone marrow microenvironment play a pivotal role in the development, maintenance, and progression of myeloma, inducing also drug resistance. These knowledges have improved treatment options, leading to the approval of new drugs which not only target the malignant cell itself, but also its microenvironment. These agents are in preclinical/early clinical evaluation and they appear to further improve disease control, but their use is still not approved outside of clinical trials.

关键词： Immunomodulators multiple myeloma New drugs Proteasome inhibitors Target therapy

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

引用

World Journal of Diabetes 2021年第5期12卷 658-672页

作者： Nikolett Bódi Diána mezei Payal Chakraborty Zita Szalai Bence Pál Barta János Balázs Zsolt Rázga Edit Hermesz m.ria Bagyánszki Department of Physiology Anatomy and NeuroscienceFaculty of Science and InformaticsUniversity of SzegedSzeged 6726Hungary Department of Biochemistry and molecular Biology Faculty of Science and InformaticsUniversity of SzegedSzeged 6726Hungary Department of Pathology Faculty of MedicineUniversity of SzegedSzeged 6720Hungary

BACKGROUND The importance of the neuronal microenvironment has been recently highlighted in gut region-specific diabetic enteric neuropathy. Regionally distinct thickening of endothelial basement membrane(Bm) of intestinal capillaries supplying the myenteric ganglia coincide with neuronal damage in different intestinal segments. Accelerated synthesis of matrix molecules and reduced degradation of matrix components may also contribute to the imbalance of extracellular matrix dynamics resulting in Bm thickening. Among the matrix degrading proteinases, matrix metalloproteinase 9(mmP9) and its tissue inhibitor(TImP1) are essential in regulating extracellular matrix *** To evaluate the intestinal segment-specific effects of diabetes and insulin replacement on ganglionic Bm thickness, mmP9 and TImP1 *** Ten weeks after the onset of hyperglycaemia gut segments were taken from the duodenum and ileum of streptozotocin-induced diabetic, insulin-treated diabetic and sex-and age-matched control rats. The thickness of Bm surrounding myenteric ganglia was measured by electron microscopic morphometry. Wholemount preparations of myenteric plexus were prepared from the different gut regions for mmP9/TImP1 double-labelling fluorescent immunohistochemistry. Post-embedding immunogold electron microscopy was applied on ultrathin sections to evaluate the mmP9 and TImP1 expression in myenteric ganglia and their microenvironment from different gut segments and conditions. The mmP9 and TImP1 messenger ribonucleic acid(m RNA) level was measured by quantitative polymerase chain *** Ten weeks after the onset of hyperglycaemia, the ganglionic Bm was significantly thickened in the diabetic ileum, while it remained intact in the duodenum. The immediate insulin treatment prevented the diabetes-related thickening of the Bm surrounding the ileal myenteric ganglia. Quantification of particle density showed an increasing tendency for mmP9 and a decreasing tenden

关键词： Type 1 diabetes Diabetic enteric neuropathy Neuronal microenvironment Basement membrane matrix metalloproteinase 9 Tissue inhibitor of metalloproteinase 1

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

Catalytic Hydrogenation of Aromatic Compounds in the Liquid Phase

引用

Journal of Chemistry and Chemical Engineering 2012年第12期6卷 1074-1082页

作者： milan Králik m.ria Turáková Ivan macák Stefan Wenchich Research Institute of Chemical Technology (VUCHTj.s.c.). Bratislava 83603 Slovakia Institute of Organic Chemistry Catalysis and Petrochemistry SIovak University of Technology Bratislava 81237 Slovakia

Peculiarities of a liquid phase hydrogenation, namely lower diffusivity of components influencing the reaction rate and deactivation of catalysts by leaching, are discussed. A focus is on hydrogenation of aromatic compounds, whereas the following processes are evaluated：（l） partial hydrogenation of benzene to cyclohexene; （2） hydrogenation of aniline; （3） hydrogenation of diphenylamine; （4） preparation of aniline from nitrobenzene; （5） hydrogenation of chloronitrobenzenes; （6） hydrogenation of 4-nitrosodiphenylamine and 4-nitrodiphenylamine mixture. Processes （1） and （6） are typically carried out in the water-oil system. Generally, this type of system allows reaching a higher selectivity to desired products. In the case of hydrogenation of 4-nitrosodiphenylamine and 4-nitrodiphenylamine mixture, the water phase extracts a water soluble catalyst; which is recycled and used for condensation of aniline and nitrobenzene. Problems of reaction kinetics, as well as catalysts deactivation are here discussed.

关键词： Hydrogenation nitroaromatics aniline dicyclohexylamine 4-aminodiphenylamine slurry reactors.

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

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：