检索结果-南通市图书馆

In vitro total phenolics,flavonoids contents and antioxidant activity of essential oil,various organic extracts from the leaves of tropical medicinal plant Tetrastigma from Sabah

引用

Asian Pacific Journal of Tropical medicine 2011年第9期4卷 717-721页

作者： m Amzad Hossain muhammad Dawood Shah charles Gnanaraj muhammad Iqbal Biotechnology Research Institute Universili Malaysia Sabah.Licked Bag No.207388999 Kota KinabaluSabahMalaysia

Objective:To detect the in vitro total phenolics,flavonoids contents and antioxidant activity of essential oil,various organic extracts from the leaves of tropical medicinal plant Tetrastigma from ***:The dry powder leaves of Tetrastigma were extracted with different organic solvent such as *** acetate,chloroform,butanol and aqueous *** total phenolic and total flavonoids contents of the essential oil and various organic extracts such as hexane,ethyl acetate,chloroform,butanol and aqueous ethanol were determined by Folin-ciocalteu method and the assayed antioxidant activity was determined in vitro models such as antioxidant capacity by radical scavenging activity usingα,α-diphenyl-β-picrylhydrazyl (DPPH) ***:The total phenolic contents of the essential oil and different extracts as gallic acid equivalents were found to be highest in methanol extract(386.22 mg/g) followed by ethyl acetate(190.89 mg/g).chloroform(175.89 mg/g).hexane(173.44 mg/g).and Imtanol extract (131.72 mg/g) and the phenolic contents not detected in essential *** antioxidant capacity of the essential oil and different extracts as ascorbic acid standard was in the order of methanol extract>ethyl acetate extract>chloroform>butanol>hexane extract also the antioxidant activity was not detected in essential ***:The findings show that the extent of antioxidant activity of the essential oil and all extracts are in accordance with the amount of phenolics present in that *** of Tetrastigma being rich in phenolics may provide a good source of antioxidant.

关键词： Total phenolics Flavonoids Antioxidant aotivity Essential oil Extracts Tetrastigma

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

Ampullary adenocarcinoma:the current state of adjuvant therapies

引用

Hepatobiliary Surgery and Nutrition 2020年第5期9卷 647-649页

作者： charles c.Vining Darryl Schuitevoerder Kiran K.Turaga Section of General Surgery/Surgical Oncology The University of Chicago MedicineChicagoUSA

Periampullary cancers,including adenocarcinoma from the duodenum,pancreas,bile duct and ampulla,represent a spectrum of malignancies with varying biological behavior and *** particular ampullary adenocarcinoma(AAc)is a rare,poorly understood disease with an incidence ofcases,compromises only 0.2%of gastrointestinal cancers and is frequently grouped together with other periampullary cancers(1).

关键词： adenocarcinoma adjuvant pancreas

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

Successful use of closed-loop allostatic neurotechnology for post-traumatic stress symptoms in military personnel： self-reported and autonomic improvements

引用

military medical Research 2018年第1期5卷 1-12页

作者： catherine L.Tegeler lee Gerdes Hossam A.Shaltout Jared F.cook Sean L.Simpson Sung W.lee charles H.Tegeler Department of Neurology Wake Forest School of Medicine Medical Center Boulevard Winston-Salem NC 27157 USA Brain State Technologies LLC 15150 North Hayden Road Scottsdale AZ 85260USA Hypertension and Vascular Research center Wake Forest School of Medicine Medical Center Boulevard Winston-Salem NC 27157USA Department of Biostatistical Sciences Wake Forest School of Medicine Medical Center Boulevard Winston-Salem NC 27157 USA

Background:military-related post-traumatic stress(PTS)is associated with numerous symptom clusters and diminished autonomic cardiovascular ***,relational,resonance-based,electroencephalic mirroringis a noninvasive,closed-loop,allostatic,acoustic stimulation neurotechnology that produces realtime translation of dominant brain frequencies into audible tones of variable pitch and timing to support the autocalibration of neural *** report clinical,autonomic,and functional effects after the use offor symptoms of military-related ***:Eighteen service members or recent veterans(15 active-duty,3 veterans,most from special operations,1 female),with a mean age of 40.9(SD=6.9)years and symptoms of PTS lasting from 1 to 25 years,undertook19.5(SD=1.1)sessions over 12 *** for symptoms of PTS(Posttraumatic Stress Disorder checklist–military version,PcL-m),insomnia(Insomnia Severity Index,ISI),depression(center for Epidemiologic Studies Depression Scale,cES-D),and anxiety(Generalized Anxiety Disorder 7-item scale,GAD-7)were collected before(Visit1,V1),immediately after(Visit2,V2),and at 1 month(Visit3,V3),3(Visit4,V4),and 6(Visit5,V5)months after intervention *** measures only taken at V1 and V2 included blood pressure and heart rate recordings to analyze heart rate variability(HRV)and baroreflex sensitivity(BRS),functional performance(reaction and grip strength)testing,blood and saliva for biomarkers of stress and inflammation,and blood for epigenetic *** t-tests,Wilcoxon signed-rank tests,and a repeated-measures ANOVA were ***:clinically relevant,significant reductions in all symptom scores were observed at V2,with durability through *** were significant improvements in multiple measures of HRV and BRS[Standard deviation of the normal beat to normal beat interval(SDNN),root mean square of the successive differences(rmSSD),high frequency(HF),low frequency(LF),and total power,HF alpha,

关键词： Neurotechnology Allostasis Autonomic Heart rate variability Baroreflex sensitivity closed-loop Acoustic stimulation military Post-traumatic stress disorder HIRREm

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

Review on signal-by-wire and power-by-wire actuation for more electric aircraft

引用

chinese Journal of Aeronautics 2017年第3期30卷 857-870页

作者： Jean-charles mAR Jian FU Institut National des Sciences Appliquees Institut Clement Ader (CNRS UMR 5312) Toulouse 31077 France School of mechanical Engineering and Automation Beihang University Beijing 100083 China

The huge and rapid progress in electric drives offers new opportunities to improve the performances of aircraft at all levels：fuel burn,environmental footprint,safety,integration and production,serviceability,and *** for safety-critical applications like flight-controls,landing gears,and even engines is one of the major consumers of non-propulsive *** actuation with centralized hydraulic power generation and distribution and control of power by throttling has been well established for decades,but offers a limited potential of *** this context,electric drives become more and more attractive to remove the natural drawbacks of conventional actuation and to offer new opportunities for improving *** paper takes the stock,at both the signal and power levels,of the evolution of actuation for safety-critical applications in *** focuses on the recent advances and the remaining challenges to be taken toward full electrical actuation for commercial and military aircraft,helicopters,and *** logically starts by emphasizing the specificity of safety-critical actuation for *** following section addresses in details the evolution of aerospace actuation from mechanically-signaled and hydraulically-supplied to all electric,with special emphasis on research and development programs and on solutions entered into ***,the last section reviews the challenges to be taken to generalize the use of all-electric actuators for future aircraft programs.

关键词： Actuator Aerospace Electrohydrostatic Electromechanical Hydraulic more electric aircraft Power-by-wire Signal-by-wire

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

contribution of different granulometric populations to powder reactivity

引用

Particuology 2009年第1期7卷 39-44页

作者： Jean-charles Benezet Ali Benhassaine Ecole des mines d’Alès 6 Avenue de Clavieres 30319 ALES CedexFrance Ecole des mines d’Alès 6 Avenue de Clavieres 30319 ALES CedexFrance

In this article, different population contributions of quartz powders to chemical reactivity in pozzolanic reaction were studied. Deconvolution software was used to show the different particle populations of each product. Reaction of quartz powder with lime in the pozzolanic reaction at 20 ℃ shows that reactivity of each powder population depends on its particle size. Adsorbed fine particles on coarse particle surfaces have a significant role in the first term of the reaction. In a second term, the micropowders react. The mesopowders react only in the last reaction terms. Until now, the reactivity of adsorbed powder has been attributed to amorphization of the particle surface.

关键词： Quartz population Reaction rate curve deconvolution Powder granulometry Specific surface area

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 magic of markets

引用

中国会计评论 2003年第0期 219-240页

作者： charles m. c. lee~* Johnson Graduate School of management, comell University, Ithaca, NY 14850, USA.

The way markets aggregate information and facilitate decentralized planning is almost magical. But paradoxically, the magic continues only because the process is flawed. Therefore, the market is better characterized as being adaptive rather than efficient; and our research should seek to understand, rather than assume, the adaptive process.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

ABc's of relationship Selling through service charles m. Futrell 8th ed.

ABC's of relationship Selling through service Charles M. Fut...

引用

丛书名： The mcGraw-Hill/Irwin series in marketing

2005年

作者： charles m. Futrell

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

The roles of black phosphorus in performance enhancement of halide perovskite solar cells

引用

Journal of Energy chemistry 2022年第4期31卷 672-683页

作者： Damir Aidarkhanov charles Surya Annie Ng Department of Electrical and computer Engineering School of Engineering and Digital SciencesNazarbayev UniversityKabanbay Batyr Ave.53Nur-Sultan 010000Kazakhstan Innovation and Technology commission Central Government Offices2 Tin Mei AvenueHong Kong 999077China

Hybrid organic-inorganic perovskite solar cells(PScs) are considered to be the most promising thirdgeneration photovoltaic(PV) technology with the most rapid rate of increase in the power conversion efficiency(PcE). To date, their PcE values are comparable to the established photovoltaic technologies such as crystalline silicon. Intensive research activities associated with PScs have been being performed,since 2009, aiming to further boost the device performance in terms of efficiency and stability via different strategies in order to accelerate the progress of commercialization. The emerging 2 D black phosphorus(BP) is a novel class of semiconducting material owing to its unique characteristics, allowing them to become attractive materials for applications in a variety of optical and electronic devices, which have been comprehensively reviewed in the literature. However, comprehensive reviews focusing on the application of BP in PScs are scarce in the community. This review discusses the research works with the incorporation of BP as a functional material in PScs. The methodology as well as the effects of employing BP in different regions of PScs are summarized. Further challenges and potential research directions are also highlighted.

关键词： Perovskite solar cells Black phosphorus Power conversion efficiency Stability Low dimensional materials

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

Gene silencing of HIF-2α disrupts glioblastoma stem cell phenotype

引用

cancer Drug Resistance 2020年第2期3卷 199-208页

作者： Leora m.Nusblat Shaili Tanna charles m.Roth Department of Biomedical Engineering RutgersThe State University of New JerseyPiscatawayNJ 08854USA Department of chemical and Biochemical Engineering RutgersThe State University of New JerseyPiscatawayNJ 08854USA

malignancy and recurrence in glioblastoma *** regions within the tumor microenvironment help maintain and promote the proliferation of ***,we explored the effects of silencing hypoxia inducible factor-2α(HIF-2α)because of its specificity for cScs within the hypoxic ***:cancer stem cell neurospheres were formed by enriching from both the glioblastoma cell line U87 and from brain tumor stem cells isolated directly from human brain *** of human HIF-2αwas performed using both commercial and in-house transfection of a validated short interfering RNA,with all results compared to an established non-silencing control short interfering *** of HIF-2αwas established by Western blotting,and phenotypic effects were assayed by cell migration assays,cell viability measurements,and immunofluorescence staining of differentiation ***:Transfection with either our previously reported pH-sensitive,cationic amphiphilic macromolecule-based delivery system or Lipofectamine was similarly effective in silencing HIF-2α.The chemotherapeutic resistance and neurosphere formation were reduced when HIF-2αwas *** capacities in the presence of macrophage conditioned media were ***-2αsilencing was complementary to temozolomide treatment in producing phenotypic rather than cytotoxic ***:HIF-2αsilencing under hypoxia inhibited cSc phenotypes while promoting differentiated cell phenotypes and is complementary to existing DNA alkylating treatments in inhibiting glioma cSc activity.

关键词： Glioblastoma multiforme cancer stem cell short interfering RNA tumor hypoxia

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

ABc's of relationship selling through service charles m. Frtrell 8e.

引用

2005年

作者： charles m. Frtrell

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

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：