检索结果-南通市图书馆

Enhanced efficiency and stability in Sn-based perovskite solar cells with secondary crystallization growth

Journal of Energy Chemistry 2021年第3期30卷 414-421页

作者： Zhixin Jin Bin-Bin Yu Min Liao Di Liu Jingwei Xiu Zheng Zhang efrat Lifshitz Jiang Tang Haisheng Song Zhubing He Department of Materials Science and Engineering Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation(FSSEG)Southern University of Science and TechnologyNo.1088Xueyuan Rd.Shenzhen 518055GuangdongChina Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyLuoyu Road 1037Wuhan 430074HubeiChina Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055GuangdongChina Schulich Faculty of Chemistry Russell Berrie Nanotechnology Institute Solid State InstituteTechnion Haifa32000Israel

The conversion efficiencies reported for Tin(Sn)halide-based perovskite solar cells(PSCs)fall a large gap behind those of lead halide-based PSCs,mainly because of poor film quality of the *** we report an efficient strategy based on a simple secondary crystallization growth(SCG)technique to improve film quality for tin halide-based PSCs by applying a series of functional amine chlorides on the perovskite *** were discovered to enhance the film crystallinity and suppress the oxidation of Sn^(2+)remarkably,hence reduce trap state density and non-irradiative recombination in the absorber ***,the SCG film holds the band levels matching better with carrier transport layers and herein favoring charge extraction at the device ***,a champion device efficiency of 8.07% was achieved alo ng with significant enhancements in VOC and JSC,in contrast to 5.35% of the control device ***,the SCG film-based devices also exhibit superior stability comparing with the control *** work explicitly paves a novel and general strategy for developing high performance lead-free PSCs.

关键词： Tin based perovskite solar cells Secondary crystallization growth Amine chloride Non-irradiative recombination Energy band levels matching

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

The effect of pollen source on seed traits and dispersability in the heterocarpic annual Crepis sancta

引用

Journal of Plant Ecology 2021年第3期14卷 425-437页

作者： efrat Dener Hagai Shemesh Itamar Giladi Albert Katz International School for Desert Studies Jacob Blaustein Institutes for Desert ResearchBen Gurion University of the NegevSede Boqer Campus8499000 Midreshet Ben-GurionIsrael Mitrani Department of Desert Ecology Swiss Institute for Dryland Environmental and Energy ResearchJacob Blaustein Institutes for Desert ResearchBen-Gurion University of the Negev8499000 Midreshet Ben-GurionIsrael Department of Environmental Sciences Tel-Hai CollegeQiryat Shemona 12208Israel

Aims The evolution and expression of dispersal-related traits are intertwined with those of other life-history functions and are manifested within various physiological *** a relationship is predicted between inbreeding levels and dispersability,which may be anatomically and ontogenetically linked so that the selection pressures on one may affect the *** both the effect of inbreeding on reproductive success and on dispersal strategies received much attention,only a few studies considered both ***,such studies often rely on two dichotomic representations of breeding and dispersal:using selfing versus outcrossing as a representation of breeding level,and dispersal ratio as the sole representation of dispersal *** Here,we used pollination experiments in the heterocarpic Crepis sancta(Asteraceae)to expand in two different manners on the common practice of using dichotomic representations of breeding and ***,we used pollination treatments that represent a continuum from selfing through pollination by kin to pollination by a distant ***,we measured a whole set of continuous morphological and dispersal-related traits,in addition to measurements of reproductive success and dispersal *** Findings The proportion of developed capitula and the number of both dispersed and non-dispersed achenes were significantly lower in the self-pollination treatment in comparison to the outcrossed *** effect of pollen sources on dispersal ratio was not statistically significant,though self-pollinated plants rarely produced non-dispersing ***'s biomass increased with distance between parent plants,but pappus width did not,leading to a nonsignificant effect of pollination on falling ***,pollen source affected mainly traits that were associated with reproductive output,but it had no clear effect on predominately dispersal-related *** differences in the response of

关键词： dispersal heterocarpy falling velocity pollination inbreeding depression

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

胫骨发育障碍40年

引用

饲料与畜牧（新饲料） 2008年第7期 24-26页

作者： R. M. Leach Jr. E. monsonego-ornan 苗燕(译) 武书庚(审校) 不详北京市畜牧兽医总站中国农业科学院饲料研究所

胫骨发育障碍是许多禽类生产过程中发生率较高的一种疾病。其典型特征表现为无血管组织损伤,软骨组织生长周期加倍。基因表达模式和基因产物的定位与内质网(ER)应激在软骨组织中的生长模式相似。这种模式激活了细胞的生存机制,被称为"... 详细信息

胫骨发育障碍是许多禽类生产过程中发生率较高的一种疾病。其典型特征表现为无血管组织损伤,软骨组织生长周期加倍。基因表达模式和基因产物的定位与内质网(ER)应激在软骨组织中的生长模式相似。这种模式激活了细胞的生存机制,被称为"自噬机制"。该机制的初始阶段出现软骨组织生长部位无血管组织的转移。特异的基因和基因产物与自噬机制及ER应激有关,由此可以确定软骨畸形形成的机制。刺激ER应激反应的生化通路也值得讨论。

关键词：发育障碍胫骨生存机制软骨组织基因产物基因表达模式应激反应组织损伤

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

Acute hepatitis B or exacerbation of chronic hepatitis B-that is the question

引用

World Journal of Gastroenterology 2008年第46期14卷 7133-7137页

作者： efrat Orenbuch-Harroch Liran Levy Eldad Ben-Chetrit Department of Medicine A Hadassah-Hebrew UniversityMedical Center

Hepatitis B virus (HBV) infection constitutes a serious global health problem. In countries with intermediate or high endemicity for HBV, exacerbations of chronic hepatitis B may be the first presentation of HBV infection. Some of these patients may be diagnosed mistakenly as having acute hepatitis B. Accurate diagnosis in these cases is very important for deciding whether to start treatment or not, because acute hepatitis B does not require therapy, while exacerbation of chronic hepatitis may benefit from it. Clinical and routine laboratory findings cannot help distinguishing between these two conditions. Therefore, several assays have been proposed for this purpose during the last few years. The presence of high levels of anti-HBe antibodies, HBsAg and HBV DNA are typical of chronic disease, whereas high titers of IgM anti-HBc, together with their high avidity index, characterize acute HBV infection. Starting from the description of a patient with acute hepatitis B-who recently came to our observation-we critically review the currently available assays that may help distinguishing between the different conditions and lead to the optimal management of each patient.

关键词： Hepatitis B Anti-hepatitis B virus antibodies Hepatitis B virus Toxic hepatitis autoimmune hepatitis

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

Targeting the overexpressed mitochondrial protein VDAC1 in a mouse model of Alzheimer’s disease protects against mitochondrial dysfunction and mitigates brain pathology

引用

Translational Neurodegeneration 2022年第1期11卷 1-30页

作者： Ankit Verma Anna Shteinfer-Kuzmine Nikita Kamenetsky Srinivas Pittala Avijit Paul Edna Nahon Crystal Alberto Ouro Vered Chalifa-Caspi Swaroop Kumar Pandey Alon monsonego Noga Vardi Shira Knafo Varda Shoshan-Barmatz Department of Life Sciences Ben-Gurion University of the Negev84105 Beer-ShevaIsrael National Institute for Biotechnology in the Negev Ben-Gurion University of the Negev84105 Beer-ShevaIsrael Achva Academic College 79804 ShikmimIsrael Department of Physiology Faculty of Health SciencesBen-Gurion University of the Negev84105 Beer-ShevaIsrael Ilse Katz Institute for Nanoscale Science and Technology Ben-Gurion University of the Negev84105 Beer-ShevaIsrael The Shraga Segal Department of Microbiology Immunologyand GeneticsFaculty of Health SciencesBen-Gurion University of the Negev84105 Beer-ShevaIsrael NeuroAging Group(NEURAL) Clinical Neurosciences Research Laboratory(LINC)Health Research Institute of Santiago de Compostela(IDIS)15706 Santiago de CompostelaSpain.

Background Alzheimer’s disease(AD)exhibits mitochondrial dysfunctions associated with dysregulated metabolism,brain inflammation,synaptic loss,and neuronal cell *** a key protein serving as the mitochondrial gatekeeper,the voltage-dependent anion channel-1(VDAC1)that controls metabolism and Ca2+homeostasis is positioned at a convergence point for various cell survival and death ***,we targeted VDAC1 with VBIT-4,a newly developed inhibitor of VDAC1 that prevents its pro-apoptotic activity,and mitochondria *** To address the multiple pathways involved in AD,neuronal cultures and a 5×FAD mouse model of AD were treated with *** addressed multiple topics related to the disease and its molecular mechanisms using immunoblotting,immunofluorescence,q-RT-PCR,3-D structural analysis and several behavioral *** In neuronal cultures,amyloid-beta(Aβ)-induced VDAC1 and p53 overexpression and apoptotic cell death were prevented by *** an AD-like 5×FAD mouse model,we showed that VDAC1 was overexpressed in neurons surrounding Aβplaques,but not in astrocytes and microglia,and this was associated with neuronal cell ***-4 prevented the associated pathophysiological changes including neuronal cell death,neuroinflammation,and neuro-metabolic ***-4 also switched astrocytes and microglia from being pro-inflammatory/neurotoxic to neuroprotective ***,VBIT-4 prevented cognitive decline in the 5×FAD mice as evaluated using several behavioral assessments of cognitive ***,VBIT-4 protected against AD pathology,with no significant change in phosphorylated Tau and only a slight decrease in Aβ-plaque *** The study suggests that mitochondrial dysfunction with its gatekeeper VDAC1 is a promising target for AD therapeutic intervention,and VBIT-4 is a promising drug candidate for AD treatment.

关键词： Alzheimer’s disease Metabolism Mitochondria Neuroinflammation VDAC1

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

Markers for neural degeneration and regeneration:novel highly sensitive methods for the measurement of thrombin and activated protein C in human cerebrospinal fluid

引用

Neural Regeneration Research 2021年第10期16卷 2086-2092页

作者： Alexandra Gerasimov Valery Golderman Shany Guly Gofrit Shay Anat Aharoni Daniela Noa Zohar Ze’ev Itsekson-Hayosh Tsviya Fay-Karmon Sharon Hassin-Baer Joab Chapman Nicola Maggio efrat Shavit-Stein Department of Neurology The Chaim Sheba Medical CenterRamat GanIsrael Department of Neurology and Neurosurgery Sackler Faculty of MedicineTel Aviv UniversityTel AvivIsrael The Movement Disorders Institute Chaim Sheba Medical CenterRamat GanIsrael Sagol School of Neuroscience Tel Aviv UniversityTel AvivIsrael Department of Physiology and Pharmacology Sackler Faculty of MedicineTel Aviv UniversityTel AvivIsrael Robert and Martha Harden Chair in Mental and Neurological Diseases Sackler Faculty of MedicineTel Aviv UniversityTel AvivIsrael Talpiot Medical Leadership Program The Chaim Sheba Medical CenterRamat GanIsrael

Inflammation and coagulation are tightly interconnected in the pathophysiology of neuronal ***,a pro-coagulant serine protease is associated with neurodegeneration and its indirect inhibitor,activated protein C(aPC),is considered *** levels of thrombin and aPC activity are readily measured in the blood,similar assays in the cerebrospinal fluid(CSF)have not been *** aim of this study was to establish a specific and sensitive enzymatic assay to measure both thrombin and aPC activity in the *** was collected from 14 patients with suspected normal pressure hydrocephalus served as a control group,while seven patients with central nervous system infections served as an acute neuro-inflammatory study group and one sample of CSF following traumatic lumbar puncture served as a positive *** and aPC activities were measured by fluorescence released by specific proteolytic cleavage in the presence of endopeptidase and amino-peptidase inhibitors to ensure *** of the method was verified by thrombin and serine-protease inhibitors N-alpha-((2-naphthylsulfinyl)glycyl)-DL-p-amidinophenylalanylpiperidine and phenylmethanesulfonyl *** of thrombin activity by CSF samples and levels of specific thrombin inhibitors were also *** and aPC activities were reliably measured and were significantly higher in the CSF of patients with central nervous system infections compared to normal pressure hydrocephalus controls,suggesting the involvement of these factors in *** thrombin activity levels in the presence of known thrombin concentration were high in patients with central nervous system infections,and low in normal pressure hydrocephalus *** of endogenous thrombin inhibitors protease nexin 1,amyloid precursor protein and anti-thrombin III in CSF by western blot indicated a significant elevation of amyloid precursor protein in infectious *** concl

关键词： activated protein C cerebrospinal fluid infection inflammation normal pressure hydrocephalus thrombin

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

光学检测系统的优化和评估的新方法(英文)

引用

电子工业专用设备 2004年第1期33卷 69-70,73,74,75,76,77页

作者： Udi efrat Camtek Ltd. Migdal Ha Emek Israel

PCB厂商使用自动光学检测仪的目的是为了检测到重要的缺陷,而对于一些特殊设计和装饰性设计则不需要检测。如果要达到这一效果,就必须适当调整系统的检测参数。提供一种衡量AOI侦测性能的新颖方法。此种方法可以尽可能的减少漏测或误报... 详细信息

PCB厂商使用自动光学检测仪的目的是为了检测到重要的缺陷,而对于一些特殊设计和装饰性设计则不需要检测。如果要达到这一效果,就必须适当调整系统的检测参数。提供一种衡量AOI侦测性能的新颖方法。此种方法可以尽可能的减少漏测或误报产生的几率,通过考量漏测与误报的各自的成本,客户可据此结果来决定特定的机器的配备。关于自动检测设备选型机制示意图和方法,相关的实用工具及生产领域的简易实施方法也作了说明。

关键词：光学检测优化与评估检测设备

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

Textural Based SVM for MS Lesion Segmentation in FLAIR MRIs

引用

Open Journal of Medical Imaging 2011年第2期1卷 26-42页

作者： Bassem A. Abdullah Akmal A. Younis Pradip M. Pattany efrat Saraf-Lavi 不详

In this paper, a new technique is proposed for automatic segmentation of multiple sclerosis (MS) lesions from brain magnetic resonance imaging (MRI). The technique uses textural features to describe the blocks of each MRI slice along with position and neighborhood features. A trained support vector machine (SVM) is used to discriminate between the blocks in regions of MS lesions and the blocks in non-MS lesion regions based on mainly the textural features with aid of the other features. The MRI slice blocks’ classification is used to provide an initial segmentation. A comprehensive post processing module is then utilized to refine and improve the quality of the initial segmentation. The main contribution of the proposed technique described in this paper is the use of textural features to detect MS lesions in a fully automated process without the need to manually define regions of interest (ROIs). In addition, the post processing module is generic enough to be applied to the results of any other MS segmentation technique to improve the segmentation quality. This technique is evaluated using ten real MRI data-sets with 10% used in the training of the textural-based SVM. The average results for the performance evaluation of the presented technique were 0.79 for dice similarity, 0.68 for sensitivity and 0.9 for the percentage of the detected lesion load. These results indicate that the proposed method would be useful in clinical practice for the detection of MS lesions from MRI.

关键词： MRI Texture Analysis Segmentation Multiple Sclerosis SVM ROI Post-Processing Fuzzy Rules

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

Unexpectedly low δ^(13)C in leaves,branches,stems and roots of three acacia species growing in hyper-arid environments

引用

Journal of Plant Ecology 2021年第1期14卷 117-131页

作者： Daphna Uni Elli Groner Elaine Soloway Amgad Hjazin Spencer Johnswick Gidon Winters efrat Sheffer Ido Rog Yael Wagner Tamir Klein Department of Plant and Environmental Sciences Weizmann Institute of ScienceRehovotIsrael The Dead Sea-Arava Science Center Tamar Regional CouncilNeve Zohar 86910Israel Institute of Plant Sciences and Genetic in Agriculture The Robert H.Smith Faculty of AgricultureFood and EnvironmentThe Hebrew University of JerusalemRehovotIsrael Arava Institute for Environmental Studies Kibbutz KeturaIsrael

Aims In plant eco-physiology,less negative(enriched)carbon 13(^(13)C)in the leaves indicates conditions of reducing leaf gas exchange through stomata,*** *** addition,^(13)C is expected to be less negative in non-photosynthetic tissues as compared with ***,these relationships inδ^(13)C from leaves(photosynthetic organs)to branches,stems and roots(non-photosynthetic organs)are rarely tested across multiple closely related tree species,multiple compartments,or in trees growing under extreme heat and *** We measured leaf-to-root^(13)C in three closely related desert acacia species(Acacia tortilis,*** and ***).We measuredδ^(13)C in leaf tissues from mature trees in southern *** parallel,a 7-year irrigation experiment with 0.5,1.0 or 4.0 L day1 was conducted in an experimental *** the end of the experiment,growth parameters andδ^(13)C were measured in leaves,branches,stems and *** Findings Theδ^(13)C in leaf tissues sampled from mature trees was ca.-27‰,far more depleted than expected from a desert tree growing in one of the Earth's driest and hottest *** acacia species and compartments,δ^(13)C was not enriched at all irrigation levels(-28‰to ca.-27‰),confirming our measurements in the mature *** compartments,leafδ^(13)C was unexpectedly similar to branch and rootδ^(13)C,and surprisingly,even less negative than stemδ^(13)*** highly depleted leafδ^(13)C suggests that these trees have high stomatai gas exchange,despite growing in extremely dry *** lack ofδ^(13)C enrichment in nonphotosynthetic tissues might be related to the seasonal coupling of growth of leaves and heterotrophic tissues.

关键词： stable isotope δ^(13)C enrichment desert tree drought resistance Acacia raddiana Acacia tortilis

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

细线条自动光学检查所面临的挑战及解决方法(英文)

引用

电子工业专用设备 2004年第2期33卷 59-65页

作者： Udi efrat Nir Dery CamtekLtd. MigdalHa'EmekISRAELCamtekLtd.MigdalHa'EmekISRAEL

制作高密度互连衬底依靠细线条印刷电路板技术,这种技术带来了非常严格的类似线间距变窄到50～15μm时的成品率问题。几何图形、形状、材料和表面抛光有关的细线条面板对光学检查提出了新的挑战,需要新的方法来保证可靠的检查。这种挑... 详细信息

制作高密度互连衬底依靠细线条印刷电路板技术,这种技术带来了非常严格的类似线间距变窄到50～15μm时的成品率问题。几何图形、形状、材料和表面抛光有关的细线条面板对光学检查提出了新的挑战,需要新的方法来保证可靠的检查。这种挑战是由生产因素产生的,例如导体线条的高宽比、在半添加加工中电镀线条的拱形顶部、有光泽或半透明的薄片和嵌入式无源元件等。其他的挑战来自物理和光学极限,即对于非常小的细线条缺陷需要达到很高的放大倍率才能查出。

关键词：自动光学检查印刷电路板细线条检查成品率缺陷检查

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：