检索结果-南通市图书馆

Diagnosing heart failure in centenarians

Journal of Geriatric Cardiology 2019年第1期16卷 1-11页

作者： Signe Hoi Rasmussen Karen Andersen-Ranberg Jordi Sanchez Dahl Mads Nybo Bernard Jeune Kaare Christensen Sabine gill Danish Aging Research Center Department of Public HealthUniversity of Southern DenmarkOdenseDenmark Department of Geriatrics Odense University HospitalOdenseDenmark Department of Cardiology Odense University HospitalOdenseDenmark Department of Clinical Biochemistry and Pharmacology Odense University'HospitalOdenseDenmark Max-Planck Odense Center on the Biodemography of Aging University of Southern DenmarkOdenseDenmark

Background As a consequence of the demographic development with increasing proportion of older people,the prevalence of heart failure(HF)is expected to rise with considerable economic and societal ***,knowledge on cardiac structure and function among population-based samples of the exceptional old is *** Population-based study of all persons(no exclusion criteria)living in the western part of Denmark and turning 100 years in the year ***-home face-to-face interviews were conducted,and echocardiography and blood sampling for plasma Brain Natriuretic Peptide(BNP)were offered to those who were able to give *** Out of 303 eligible,238(79%)participated,of which 125(53%)accepted *** ventricular(LV)dysfunction was present in 68(54%)of the participants of whom less than half had HF *** hypertension was present in 31(42%)with no correlation to LV *** well-known association between increased level of BNP and the prevalence of LV dysfunction could not be *** This in-home echocardiographic study shows that more than half of the participants had LV dysfunction,although mostly *** was no association between heart failure symptoms and LV ***,BNP seems to have lost its biomarker potential to rule out heart failure in *** to the latter,and the questionable symptom validity among centenarians,the current criteria to diagnose HF might be less valid in a centenarian population than in younger olds.

关键词： Brain Natriuretic Peptide Centenarian Heart failure In-home echocardiography Left ventricular dysfunction

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

On-demand production of hydrogen by reacting porous silicon nanowires with water

引用

Nano Research 2020年第5期13卷 1459-1464页

作者： Rui Ning Yue Jiang Yitian Zeng Huaxin Gong Jiheng Zhao Jeffrey Weisse Xinjian Shi Thomas M.gill Xiaolin Zheng Department of Materials Science and Engineering Stanford UniversityStanfordCA 94305USA Department of Mechanical Engineering Stanford UniversityStanfordCA 94305USA Department of Chemical Engineering Stanford UniversityStanfordCA 94305USA

On-demand hydrogen generation is desired for fuel cells,energy storage,and clean energy *** nanowires(SiNWs)and nanoparticles(SiNPs)have been reported to generate hydrogen by reacting with water,but these processes usually require external assistance,such as light,electricity or ***,we demonstrate that a porous SiNWs array,which is fabricated via the metal-assisted anodic etching(MAAE)method,reacts with water under ambient and dark conditions without any energy *** reaction between the SiNWs and water generates hydrogen at a rate that is about ten times faster than the reported rates of other Si *** possible sources of enhancement are discussed:SiNWs maintain their high specific surface area as they don’t agglomerate,and the intrinsic strain of the nanowires promotes the ***,the porous SiNWs array is portable,reusable,and environmentally friendly,yielding a promising route to produce hydrogen in a distributed manner.

关键词： silicon nanowire porous silicon hydrogen generation metal-assisted anodic etching metal-assisted chemical etching water splitting

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

Thiamine hydrochloride(VB1):An efficient catalyst for one-pot synthesis of α-aminophosphonates under ultrasonic irradiation

引用

Chinese Chemical Letters 2011年第5期22卷 563-566页

作者： Priyanka G.Mandhane Ratnadeep S.Joshi Deepak R.Nagargoje Charansingh H.gill Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabadMaharashtra 431004India

An efficient synthesis of novelα-aminophosphonates by the reaction of aldehydes and amines with triethyl phosphite in the presence of the easily available,inexpensive,and nontoxic catalyst thiamine hydrochloride（VB1）.This method affords theα-aminopho-sphonates under the influence of ultrasound irradiation in aqueous medium,in short reaction times（4-6 min）,high yields（85-95%）, with improved *** process is green,mild,inexpensive and excellent yields are the main compensation of this procedure.

关键词： Thiamine hydrochloride(VB1) α-Aminophosphonates Triethyl phosphate Water Ultrasonication Green synthesis

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

Ammonium metavanadate:A novel catalyst for synthesis of 2-substituted benzimidazole derivatives

引用

Chinese Chemical Letters 2009年第3期20卷 292-295页

作者： Ganesh R.Jadhav Mohammad U.Shaikh Rajesh P.Kale Charansingh H.gill Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabadMaharashtra 431 004India Division of Medicinal Chemistry Wockhardt Research CentreD-4Chikalthana M.I.D.C.AreaAurangabadMaharashtra 431 210India

Ammonium metavanadate （10 mol%） was found to be a useful catalyst for the synthesis of various 2-substituted aryl benzimidazoles. It was used as an oxidizing agent for the condensation of o-phenylenediamine with different substituted aryl aldehydes at room temperature in ethanol. The method was proved to be simple, convenient and the product was isolated with good yields （79-91%）.

关键词： Ammonium metavanadate Oxidation Aryl aldehyde Benzimidazole

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

Short turn radius colonoscope in an anatomical model: Retroflexed withdrawal and detection of hidden polyps

引用

World Journal of Gastroenterology 2015年第2期21卷 593-599页

作者： Sarah K Mc gill Shivangi Kothari Shai Friedland Ann Chen Walter G Park Subhas Banerjee Division of Gastroenterology and Hepatology Stanford University School of MedicineStanfordCA 94305United States

AIM: To evaluate the new Retro View^(TM) colonoscope and compare its ability to detect simulated polyps "hidden" behind colonic folds with that of a conventional colonoscope, utilizing anatomic colon ***: Three anatomic colon models were prepared,with twelve simulated polyps "hidden" behind haustral folds and five placed in easily viewed locations in each model. Five blinded endoscopists examined two colon models in random order with the conventional or Retro View^(TM) colonoscope, utilizing standard withdrawal technique. The third colon model was then examined with the Retro View^(TM) colonoscope withdrawn initially in retroflexion and then in standard withdrawal. Polyp detection rates during standard and retroflexed withdrawal of the conventional and Retro View^(TM) colonoscopes were determined. Polyp detection rates for combined standard and retroflexed withdrawal(combination withdrawal) with the Retro View^(TM) colonoscope were also ***: For hidden polyps, retroflexed withdrawal using the Retro View^(TM) colonoscope detected more polyps than the conventional colonoscope in standard withdrawal(85% vs 12%, P = 0.0001). For hidden polyps, combination withdrawal with the Retro View^(TM) colonoscope detected more polyps than the conventional colonoscope in standard withdrawal(93% vs 12%, P ≤ 0.0001). The Retro View^(TM) colonoscope in "combination withdrawal" was superior to other methods in detecting all(hidden + easily visible) polyps, with successful detection of 80 of 85 polyps(94%) compared to 28(32%) polyps detected by the conventional colonoscope in standard withdrawal(P < 0.0001) and 67(79%) polyps detected by the Retro View^(TM) colonoscope in retroflexed withdrawal alone(P < 0.01). Continuous withdrawal of the colonoscope through the colon model while retroflexed was achieved by all endoscopists. In a post-test survey, four out of five colonoscopists reported that manipulation of the colonoscope was easy or very ***: In

关键词： Colonoscopy Adenoma detection Polyp detection Colo

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

Identification and Quantitation of Cashmere (Pashmina) Fiber and Wool Using Novel Microchip Based Real-Time PCR Technology

引用

Journal of Textile Science and Technology 2018年第4期4卷 141-150页

作者： Rajwant gill Sikander gill Maxim Slyadnev Alexander Stroganov Lumex Instruments Canada Mission Canada

The textile industrial chain all over the world is facing a challenge of differentiating cashmere fiber from mixture of wool and other fibers in case cashmere stocks are adulterated with wool or other fibers. For identification of cashmere in such mixtures, the development of microchip based real-time PCR technology offers a very sensitive, specific, and accurate solution. The technology has been validated with cashmere and wool samples procured from distant farms, and from cashmere goats and sheep of different age and sex. Model samples with incremental raw cashmere or wool content were tested. The experimentally determined content was found to be comparable to the weighed content of the respective fibers in the samples. This technology may prove a cost cutter since it needs only 1.2 μl of the PCR reagent mix. It is substantially faster than traditional real-time PCR systems for being carried as miniature reaction volume in metal microchip. These features allow faster thermal equilibrium and thermal uniformity over the entire array of microreactors. For routine tests or in commercial set up, the microchips are available as ready-to-run with lyophilized reagents in its microreactors to which only 1 μl of the 10-fold diluted isolated DNA sample is added. The lyophilized microchips offer user-friendly handling in testing laboratories and help minimize human error.

关键词： Microchip Real-Time PCR Identification Quantitation Cashmere Wool

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

Seasonal Rainfall Forecasts for the Yangtze River Basin in the Extreme Summer of 2020

引用

Advances in Atmospheric Sciences 2021年第12期38卷 2212-2220,I0013页

作者： Philip E.BETT gill M.MARTIN Nick DUNSTONE Adam A.SCAIFE Hazel E.THORNTON Chaofan LI Met Office Hadley Centre FitzRoy RoadExeter EX13PBUK College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeterEX44QFUK Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Seasonal forecasts for Yangtze River basin rainfall in June,May–June–July(MJJ),and June–July–August(JJA)2020 are presented,based on the Met Office GloSea5 *** three-month forecasts are based on dynamical predictions of an East Asian Summer Monsoon(EASM)index,which is transformed into regional-mean rainfall through linear *** June rainfall forecasts for the middle/lower Yangtze River basin are based on linear regression of *** forecasts verify well in terms of giving strong,consistent predictions of above-average rainfall at lead times of at least three ***,the Yangtze region was subject to exceptionally heavy rainfall throughout the summer period,leading to observed values that lie outside the 95%prediction intervals of the three-month *** forecasts presented here are consistent with other studies of the 2020 EASM rainfall,whereby the enhanced mei-yu front in early summer is skillfully forecast,but the impact of midlatitude drivers enhancing the rainfall in later summer is not *** case study demonstrates both the utility of probabilistic seasonal forecasts for the Yangtze region and the potential limitations in anticipating complex extreme events driven by a combination of coincident factors.

关键词： seasonal forecasting flood forecasting Yangtze basin rainfall East Asian Summer Monsoon

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

一种基于交叉熵的黑白棋盘角点检测算法

引用

西北工业大学学报 2015年第2期33卷 216-221页

作者：赵斌 J.Guo E.K.a.gill 周军西北工业大学精确制导与控制研究所陕西西安710072 Faculty of Aerospace Engineering Delft University of TechnologyKluyverweg 12629 HS DelftThe Netherlands

分析了现有黑白棋盘角点检测算法存在的不足,将交叉熵思想引入角点检测中。该算法首先将角点周围像素划分为4个象限,通过相邻象限间的像素灰度差实现角点初选;其次,给出对角象限灰度交叉熵定义,根据局部交叉熵最小原理实现角点筛选;第3... 详细信息

分析了现有黑白棋盘角点检测算法存在的不足,将交叉熵思想引入角点检测中。该算法首先将角点周围像素划分为4个象限,通过相邻象限间的像素灰度差实现角点初选;其次,给出对角象限灰度交叉熵定义,根据局部交叉熵最小原理实现角点筛选;第3,针对备选角点局部重叠的问题,采用梯度幅值非极大值抑制方法实现像素级角点定位;最后采用Frostner算子实现角点的亚像素坐标解算。实验结果显示该算法检测结果优于经典Harris算子以及SV算子,获取的角点亚像素坐标精度与Matlab相机标定工具箱相当,同时易于实现在线标定。

关键词：相机标定棋盘角点检测交叉熵非极大值抑制梯度幅值

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

β-Cyclodextrin as a supramolecular catalyst for the synthesis of 2Hindazolo[2,1-b]phthalazine-trione derivatives in water and their antimicrobial activities

引用

Chinese Chemical Letters 2017年第7期28卷 1577-1582页

作者： Asha V.Chate Priyanka K.Bhadke Manisha A.Khande Jaiprakash N.Sangshetti Charansingh H.gill Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad 431004M.S.India Y.B.Chavan College of Pharmacy Rafiq Zakaria CampusAurangabad 431001India

An efficient and green method has been developed for the synthesis of 2H-indazolo[2,1-b]phthalazinetriones derivatives by employing 15 mol%β-cyclodextrinvia a one-pot multicomponent reaction of aldehyde,dimedone,hydrazine hydrate with succinic anhydride/phthalic anhydride in water at 80 ℃ for first *** catalyst could be recovered and reused for four consecutive cycles without appreciable loss in catalytic activity and evaluated for in vitro antimicrobial activity against different Gram-positive and Gram-negative bacterial *** outcome of the screening study showed that compound 6d,6f and7 n exhibited excellent activity against ***,compound 6f and 6h exhibited excellent activity against ***,and compound 6c,and 6e displayed again excellent activity against Staphylococcus aureus whereas compound 7o shows excellent activity against *** and *** when compared with Ampicillin（standard control）.The results indicated that maximum compounds are moderately effective against bacterial growth and their effectiveness is highest against standard drugs.

关键词： Multicomponent reactions(MCRs) Pyridazino[1 2-a]indazole-triones 2H-Indazolo[2 1-b]phthalazine-trione β-Cyclodextrin Aqueous medium Green method Antimicrobial activity

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

Signed Tilings by Ribbon L n-Ominoes, n Even, via Gröbner Bases

引用

Open Journal of Discrete Mathematics 2016年第3期6卷 185-206页

作者： Kenneth gill Viorel Nitica Department of Mathematics West Chester University West Chester USA

Let Tn be the set of ribbon L-shaped n-ominoes for some n≥4 even, and let T+n be Tn with an extra 2 x 2 square. We investigate signed tilings of rectangles by Tn and T+n . We show that a rectangle has a signed tiling by Tn if and only if both sides of the rectangle are even and one of them is divisible by n, or if one of the sides is odd and the other side is divisible by . We also show that a rectangle has a signed tiling by T+n, n≥6 even, if and only if both sides of the rectangle are even, or if one of the sides is odd and the other side is divisible by . Our proofs are based on the exhibition of explicit GrÖbner bases for the ideals generated by polynomials associated to the tiling sets. In particular, we show that some of the regular tiling results in Nitica, V. (2015) Every tiling of the first quadrant by ribbon L n-ominoes follows the rectangular pattern. Open Journal of Discrete Mathematics, 5, 11-25, cannot be obtained from coloring invariants.

关键词： Polyomino Replicating Tile L-Shaped Polyomino Skewed L-Shaped Polyomino Signed Tilings Gröbner Basis Tiling Rectangles Coloring Invariants

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：