检索结果-南通市图书馆

Pedosphere 2016年第2期26卷 192-205页

作者： francisco j. CALDERON David NIELSEN Veronica ACOSTA-MARTINEZ Merle F. VIGIL Drew LYON USDA-ARS Central Great Plains Research Station Akron CO 80720 USA USDA-ARS Cropping Systems Research Laboratory Wind Erosion and Water Conservation Unit Lubbock TX 79415 USA Department of Crop and Soil Sciences Washington State University Pullman WA 99164-6420 USA

盖子庄稼能由增加碳(C) 供应在土壤微生物学上有有益的效果，但是这些有益的效果能被降水条件调制。这研究的目的是比较休闲冬季小麦(Triticum aestivum L.) 旋转到在在半干旱的美国高平原的 rainfed 和灌溉条件下面的几盖子庄稼冬季小... 详细信息

盖子庄稼能由增加碳(C) 供应在土壤微生物学上有有益的效果，但是这些有益的效果能被降水条件调制。这研究的目的是比较休闲冬季小麦(Triticum aestivum L.) 旋转到在在半干旱的美国高平原的 rainfed 和灌溉条件下面的几盖子庄稼冬季小麦旋转。实验在科罗拉多在二个地点，在内布拉斯加的 Sidney，和 Akron 被执行，美国与三次在在盖子庄稼结束的 2012-2013 的土壤采样，种的小麦，和小麦成熟。实验包括了四单个种类的盖子庄稼， 10 种类混合物，和一个休闲处理。测量的变量是土壤 C 和氮(N) ，由甲基酉旨(名声) 介绍的丰满的酸的土壤社区结构，和土壤 -glucosidase,-glucosaminidase, 和 phosphodiesterase 活动。休闲处理，缺乏生活植物，在盖子庄稼结束减少了大多数名声的集中。全部的名声集中与盖子庄稼生物资源被相关(R = 0.62 在 Sidney 并且 0.44 在 Akron ) 。等到种的小麦，有灌溉的有益的效果，它在 mycorrhizal 和原生动物门标记引起了增加。在小麦成熟，土壤名声上的盖子庄稼和灌溉效果减退了，但是灌溉在 Akron 在 -glucosidase 和 phosphodiesterase 活动上有积极效果，它二个地点中是更干燥的。盖子庄稼和灌溉是慢的影响土壤 C 集中。我们的结果证明盖子庄稼在在半干旱的基于小麦的旋转和灌溉的微生物引起的社区能提高的土壤上有短命效果土壤酶活动。在半干旱的环境，更长的时间跨度可能被需要在土壤上看见盖子庄稼的有益的效果微生物引起的社区结构，土壤酶活动，和土壤 C 隐遁。

关键词：土壤微生物群落覆盖作物灌溉条件酯酶活性美国平原 β-葡萄糖苷酶微生物群落结构

Secondary male hypogonadism： a prevalent but overlooked comorbidity of obesity

在线全文

学校读者我要写书评

暂无评论

Asian journal of Andrology 2018年第6期20卷 531-538页

作者： Maria Molina-Vega Araceli Munoz-Garach Miguel Damas-Fuentes jose Carlos Fernfindez-garcia francisco j inahones Department of Endocrinology and Nutrition Virgen de la Victoria Universitary Hospital Malaga 29010 Spain Institute of Biomedical Research in Malaga (IBIMA) Virgen de la Victoria Universitary Hospital Malaga 29010 Spain CIBER Pathophysiology of Obesity and Nutrition (CB06/003) Institute of Health Carlos Ⅲ (ISCⅢ) Madrid 28029 Spain.

Male hypogonadism associated with obesity is a very prevalent condition and is increasing in parallel with the epidemic prevalence of obesity. Low testosterone levels promote higher fat mass with reduced lean mass. Male hypogonadism is related to an increase in associated cardiometabolic complications, such as hypertension, type 2 diabetes mellitus, the metabolic syndrome, and cardiovascular disease. Its influence as a comorbidity of obesity is becoming more evident and should be evaluated and treated in at-risk patients. Mechanisms involved in this relationship include body composition changes, the presence of adipokines, insulin resistance, and other factors, some of which are still unknown. Weight loss and treatment to replace testosterone levels improve the metabolic profile and quality of life in patients with obesity and hypogonadism; these beneficial effects depend on treatment modality and duration of therapy. The use of testosterone replacement therapy may be indicated, as it has not been shown to increase cardiovascular risk, and retrospective studies suggest a reduction in events in men with metabolic syndrome and type 2 diabetes.

关键词： adipose tissue male hypogonadism obesity testosterone

Pancreatic intraepithelial neoplasia arising from an ectopic pancreas in the small bowel

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

Hepatobiliary & Pancreatic Diseases International 2014年第6期13卷 658-661页

作者： francisco Igor Macedo Deepa Taggarshe Tafadzwa Makarawo Barry Herschman Michael j jacobs Department of General Surgery Providence Hospital and Medical Centers Southfield MI 48075 USA Department of General Surgery Providence Hospital and Medical Centers Southfield MI 48075 USA Department of Pathology Providence Hospital and Medical Centers Southfield MI 48075 USA

BACKGROUND： Ectopic pancreatic tissue is relatively uncommon, and is characterized as pancreatic tissue with no contact with the normal pancreas, and with its own ductal system and blood supply. It is usually asymptomatic, and can be incidentally diagnosed by conventional imaging studies. METHOD： A 69-year-old woman with a prior history of bilateral breast carcinoma presented with ectopic pancreatic intraepithelial neoplasia （PanIN） that was identified incidentally in the small bowel during an oncological resection of a synchronous primary pancreatic adenocarcinoma, and renal cell carcinoma. RESULTS： The patient underwent subtotal pancreatectomy with splenectomy, regional lymphadenectomy, radical left nephrectomy, and small bowel resection with primary anastomosis of ectopic PanlN-2. She had an uneventful hospitalization and was discharged home on postoperative day 7. CONCLUSIONS： The occurrence of ectopic PanIN is extremely unusual with only few cases previously reported in the literature. The need for negative margins after surgical resection of ectopic PanIN lesions remains controversial.

关键词： ectopic pancreas pancreatic intraepithelial neoplasia PanIN pancreatic adenocarcinoma

Re-folded structure of syn-orogenic granitoids(Padrón dome, NW Iberia):Assessing rheological evolution of cooling continental crust in a collisional setting

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2019年第2期10卷 651-669页

作者： Rubén Díez Fernández francisco j.Rubio Pascual Luis Miguel Martín Parra Departamento de Geodinámica Estratigrafía y PaleontologíaFacultad de Ciencias GeológicasUniversidad Complutense de Madrid Instituto Geológico y Minero de Espana

This contribution discusses about the rheological, kinematic and dynamic frameworks necessary to produce recumbent and upright folds from syn-orogenic granitic massifs that were formed during an early stage of magma genesis related to the onset of a migmatitic dome. Syn-kinematic granitoids occurring within the high-grade infrastructure of the Padron migmatitic dome(NW Iberia) are deformed into largescale recumbent folds(D_2) that are later affected by upright folds(D_3). Petrostructural analysis of a selected area of this dome reveals that after a period of crustal thickening(D_1), NNW-directed extensional flow gave way to recumbent folds and penetrative axial plane foliation(S_2). Superimposed subhorizontal compression resulted in upright folds(D_3). A closer view into the dynamics of the dome allows exploring the factors that may condition the nucleation of folds with contrasting geometries during progressive deformation of molten continental crust. The formation of folds affecting syn-kinematic granitoids suggests a cooling metamorphic path in migmatitic domes. Active and passive folding mechanisms require a crystallizing(cooling) magma to nucleate folds. A more competent metamorphic host inhibits fold nucleation from much less competent magmas. As it crystallizes, magma becomes more rigid(competent),and approaches viscosity values of its host. Passive folding is favored when no significant competence contrast exists between magma and host, so this folding mechanism is more likely shortly after magma genesis and emplacement. In such conditions, and under dominant subhorizontal flow accompanied by flattening(D_2),passive folding would produce isoclinal recumbent geometries. Further magma cooling introduces a shift into the rheological behavior of partially molten crust. Thereon, crystallizing magma bodies would represent significant competence contrasts relative to their host. At this point, buckling is a more likely folding mechanism, and more regular, buckle fo

关键词： Recumbent folds Migmatitic domes Partial melting Crustal-derived granitoids Orogenic collapse Variscan orogen

Redox Regulation of Glycogen Biosynthesis in the Cyanobacterium Synechocystis sp. PCC 6803： Analysis of the AGP and Glycogen Synthases

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2014年第1期7卷 87-100页

作者： Sandra Diaz-Troya Luis Lopez-Maury Ana Maria Sanchez-Riego Miguel Roldan francisco j. Florencio Instituto de Bioquimica Vegetal y Fotosintesis Universidad de Sevilla-CSIC Americo Vespucio 49 E-41092 Sevilla Spain

Glycogen constitutes the major carbon storage source in cyanobacteria, as starch in algae and higher plants. Glycogen and starch synthesis is linked to active photosynthesis and both of them are degraded to glucose in the dark to maintain cell metabolism. Control of glycogen biosynthesis in cyanobacteria could be mediated by the regulation of the enzymes involved in this process, ADP-glucose pyrophosphorylase （AGP） and glycogen synthase, which were identified as putative thioredoxin targets. We have analyzed whether both enzymes were subjected to redox modification using purified recombinant enzymes or cell extracts in the model cyanobacterium Synechocystis sp. PCC 6803. Our results indicate that both AGP and glycogen synthases are sensitive to copper oxidation. However, only AGP exhibits a decrease in its enzymatic activity, which is recovered after reduction by DTT or reduced thioredoxin （TrxA）, suggesting a redox control of AGP. In order to elucidate the role in redox control of the cysteine residues present on the AGP sequence （C45, C185, C320, and C337）, they were replaced with serine. All AGP mutant proteins remained active when expressed in Synechocystis, although they showed different electrophoretic mobility profiles after copper oxidation, reflecting a complex pattern of cysteines interaction.

关键词： cyanobacteria glycogen Synechocystis thioredoxin redox regulation.

Cellular modelling using P systems and process algebra

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

Progress in Natural Science:Materials International 2007年第4期17卷 375-383页

作者： francisco j. Romero-Campero Marian Gheorghe Gabriel Ciobanu john M. Auld Mario j. Pérez-jiménez Research Group on Natural Computing Department of Computer Science and Artificial IntelligenceUniversity of SevilleAvda.Reina Mercedes41012 SevillaSpain Department of Computer Science The University of Sheffield Regent CourtPortobello StreetSheffield S1 4DPUK Romanian Academy Institute of Computer ScienceBlvd. Carol I nr. 11700505IasiRomania

In this paper various molecular chemical interactions are modelled under different computational paradigms. P systems andπ-calculus are used to describe intra-cellular reactions like protein-protein interactions and ... 详细信息

关键词： cellular modelling P systems process algebra.

Neumann Boundary Conditions Inhibiting SSB in Coleman-Weinberg Mechanism

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2010年第12期54卷 1071-1074页

作者： F.N.Fagundes R.O.francisco B.B.Dilem j.A.Nogueira Universidade Federal do Espírito Santo

如果有限区域的长度是足够小的，在这个工作，我们证明同类的 Neumann 边界条件为自发的对称在分级的 electrodynamics 碎禁止 ColemanWeinberg 机制(= e2 M ? 1， M 在哪儿是分级的地的团，由 ColemanWeinberg 机制产生了) 。

关键词：平衡机制诺伊曼边界条件温伯格 Neumann边界条件单边带自发对称破缺电动力学有限区域

Amyotrophic lateral sclerosis: a complex syndrome that needs an integrated research approach

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2019年第2期14卷 193-196页

作者： javier Riancho francisco j.Gil-Bea Ana Santurtun Adolfo López de Munaín Service of Neurology Hospital Sierrallana-Idival CIBERNED (Center for Networked Biomedical Research on Neurodegenerative Diseases Ministry of Economy and Competitiveness Institute Carlos Ⅲ) Neurosciences Area Institute Biodonostia Department of Physiology and Pharmacology University of Cantabria-Idival Department of Neurology University Hospital Donostia Department of Neurosciences University of the Basque Country Universidad País Vasco-Euskal Herria Unibertsitatea

Amyotrophic lateral sclerosis, the most common neurodegenerative disease affecting motor neurons, lacks an effective treatment. A small fraction of amyotrophic lateral sclerosis cases have a familial origin, related to mutations in causative genes, while the vast majority of amyotrophic lateral sclerosis cases are considered to be sporadic, resulting from the interaction between genes and environmental factors in predisposed individuals. During the past few years, dozens of drugs have been postulated as promising strategies for the disease after showing some beneficial effects in preclinical cellular and murine models. However, the translation into clinical practice has been largely unsuccessful and the compounds failed when were tested in clinical trials. This might be explained, at least partially, by the enormous complexity of the disease both from clinico-epidemiological and a pathogenic points of view. In this review, we will briefly comment on the complexity of the disease focusing on some recent findings, and we will suggest how amyotrophic lateral sclerosis research might be reoriented to foster the advance in the diagnostic and therapeutic questions.

关键词： amyotrophic lateral sclerosis ALS environment epidemiology genes phenotype therapy

Blue-Red Tuning Emission of ZnO: Europium Quantum Dots with Different Excitation Wavelengths

在线全文

学校读者我要写书评

暂无评论

Open journal of Applied Sciences 2018年第10期8卷 441-445页

作者： Primitivo Ortiz Maldonado Ana K. Chavez-Alvarado francisco j. Rodríguez Gutierrez joan Reyes Miranda Dulce Y. Medina Velazquez Miguel A. Barron Elizabeth Garfias garcía Universidad Autónoma Intercultural de Sinaloa El Fuerte México División de Ciencias Básicas e Ingeniería Universidad Autónoma Metropolitana Reynosa Tamaulipas México

Optoelectronic applications require the development of new fluorescent and efficient luminescent materials, free of toxicity, low in cost, and easy to produce. In this way the synthesis of zinc-oxide (ZnO) quantum dots (QDs) has recently received special attention due to their good optical, electrical and chemical properties with low production costs and blue light emission. In this work ZnO QDs were successfully doped with europium in order to obtain a tunable emission luminescence from blue emission of ZnO to red emission of europium as a function of wavelength excitation. Results show an efficient blue to red tuning when the excitation wavelength was changed from 317 nm to 395 nm, respectively. This opens the possibility of having new optical devices to produce different color emission using the same material.

关键词： Chromaticity Diagram Emission Spectra Europium Luminescence Red-Blue Tuning ZnO Quantum Dots White Light

Identifying specific RGC types may shed light on their idiosyncratic responses to neuroprotection

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

Neural Regeneration Research 2015年第8期10卷 1228-1230页

作者： Manuel Vidal-Sanz francisco M.Nadal-Nicolás francisco j.Valiente-Soriano Marta Agudo-Barriuso Maria P.Villegas-Pérez Departamento de Oftalmología Facultad de Medicina Universidad de Murcia and Instituto Murciano de Investigación Biosanitaria Virgen de la Arrixaca (IMIB-Arrixaca) Campus de Ciencias de la Salud Carretera Buenavista s/n 30120 El Palmar Murcia Spain

Retinal ganglion cells（RGCs）are located in the innermost layer of the retina and are the only retinal output neurons,conveying light information to the main retinorecipient target regions of the brain responsible for the image-and non-image-forming visual *** are well over twenty RGC types,each with its own dendritic morphology and physiological characteristics,

关键词： RGCs retina physiological conveying ganglion glaucoma suppression neurotrophin pigmented reflex