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Optimized Method to Analyze Rose Plant Volatile Organic Compounds by HS-SPME-GC-FID/MSD

Journal of Biosciences and Medicines 2017年第3期5卷 13-31页

作者： Mohammed Ibrahim Manjree Agarwal giles Hardy Yonglin Ren School of Veterinary and Life Science Murdoch University Murdoch Australia College of Agriculture University of Babylon Babylon Iraq

A method involving Headspace solid-phase microextraction (HS-SPME) fiber combined with gas chromatography (GC) coupled with flame ionization detection (FID) and gas chromatography with mass spectrometry (GC-MS) was developed and optimized to investigate volatile organic compounds (VOCs) from different tissues (flowers, leaves, stems, rhizosphere and whole plants) of Floribunda and Hybrid Tea roses (intact and cut). Three-phase fiber 50/30 μm divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS) was used. Two types of chambers (Tedlar bag and glass jar) were evaluated for collection of VOCs and glass jar was selected. Absorbed compounds on the fiber were completely desorbed in the GC injector port at three desorption times (5, 10 and 15 min), and 5 min at 250?C was used. The maximum extraction efficiency for flowers tissues (equilibrium absorption) was achieved 2 h after fiber exposure in the headspace for intact and cut Floribunda and Hybrid Tea flowers. Under the optimized HS-SPME and GC-FID/MS conditions, 1h extraction time was chosen for intact and cut Floribunda and Hybrid Tea leaves and stems. The results demonstrated that 5 cm depth was selected for root and soil part (rhizosphere) for both rose cultivars, and 6 h and 12 h extraction time of VOCs from rhizosphere was achieved for Floribunda and Hybrid Tea, respectively. One hour was chosen for VOCs released from whole rose plants for both cultivars. In this study, the VOC profiles of two rose cultivars were characterized by the optimized HS-SPME-GC method. The different tissues of rose plants gave wide range of the VOCs;also the chromatograms of different cultivars were quite different and the specific VOC pattern of rose types depends on the species. Results from this study demonstrate the feasibility of this method for identifying VOCs from two rose cultivars and the potential use of this method for physiological studies on rose plants or on other floriculture plants.

关键词： Optimization Rose tissues VOCs SPME-GC-FID/MS Floribunda Hybrid Tea

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Electrically-pumped compact topological bulk lasers driven by band-inverted bound states in the continuum

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Light(Science & Applications) 2023年第7期12卷 1337-1345页

作者： Song Han Jieyuan Cui Yunda Chua Yongquan Zeng Liangxing Hu Mingjin Dai Fakun Wang Fangyuan Sun Song Zhu Lianhe Li Alexander giles Davies Edmund Harold Linfield Chuan Seng Tan Yuri kivshar Qi Jie Wang Centre for Optoelectronics and Biophotonics School of Electrical and Electronic Engineering&The Photonics InstituteNanyang Technological UniversitySingaporeSingapore Electronic Information School Wuhan UniversityWuhanChina school of Electronic and Electrical Engineering University of LeedsLeedsUK Nonlinear Physics Center Research School of PhysicsAustralian National UniversityCanberraACT 2601Australia Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingaporeSingapore

One of the most exciting breakthroughs in physics is the concept of topology that was recently introduced to photonics,achieving robust functionalities,as manifested in the recently demonstrated topological ***,so far almost all attention was focused on lasing from topological edge *** bands that reflect the topological bulk-edge correspondence have been largely ***,we demonstrate an electrically pumped topological bulk quantum cascade laser(QCL)operating in the terahertz(THz)frequency *** addition to the band-inversion induced in-plane reflection due to topological nontrivial cavity surrounded by a trivial domain,we further illustrate the band edges of such topological bulk lasers are recognized as the bound states in the continuum(BiCs)due to their nonradiative characteristics and robust topological polarization charges in the momentum ***,the lasing modes show both in-plane and out-of-plane tight confinements in a compact laser cavity(lateral size~3λ_(laser)).Experimentally,we realize a miniaturized THz QCL that shows single-mode lasing with a side-mode suppression ratio(SMSR)around 20 *** also observe a cylindrical vector beam for the far-field emission,which is evidence for topological bulk BIC *** demonstration on miniaturization of single-mode beam-engineered THz lasers is promising for many applications including imaging,sensing,and communications.

关键词： pumped polarization lasing

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绘制网格数据的等值图

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微型计算机 1995年第3期15卷 80-81,F004页

作者： giles,B 李宗杰

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Migrant Labor Markets and the Welfare of Rural Households in the Developing World:Evidence from China

Migrant Labor Markets and the Welfare of Rural Households in...

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北京论坛（2006）文明的和谐与共同繁荣—对人类文明方式的思考

作者： Alan de Brauw John giles IFPRI Department of Economics Williams College Department of Economics Michigan State University

Overview When the cost of finding employment in urban destinations declines,members of rural households experience a dramatic increase in their potential *** the extent that migrants remit substantial portions of income to family-members remaining in villages, reductions in the cost of migration may play an important role in rural ***

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新型农村社会养老保险政策效果评估——收入、贫困、消费、主观福利和劳动供给

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经济学(季刊) 2015年第1期14卷 203-230页

作者：张川川 John giles 赵耀辉中央财经大学经济学院北京大学国家发展研究院世界银行发展研究部

本文使用中国健康与养老追踪调查(CHARLS)数据,采用断点回归和双重差分识别策略,估计了"新农保"对农村老年人收入、贫困、消费、主观福利和劳动供给的影响。研究结果显示,"新农保"养老金收入显著提高了农村老年人的收入水平、减少了贫... 详细信息

本文使用中国健康与养老追踪调查(CHARLS)数据,采用断点回归和双重差分识别策略,估计了"新农保"对农村老年人收入、贫困、消费、主观福利和劳动供给的影响。研究结果显示,"新农保"养老金收入显著提高了农村老年人的收入水平、减少了贫困的发生、提高了其主观福利,并在一定程度上促进了家庭消费和减少了老年人劳动供给。进一步的研究显示,健康状况较差的老年人受到的政策影响更大更显著,表明"新农保"的政策影响存在异质性。

关键词：新型农村社会养老保险断点回归双重差分

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办公建筑光环境及能耗评价方法研究

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建筑学报 2013年第2期 86-89页

作者：孙婵娟连之伟 Harry giles 上海交通大学船舶海洋与建筑工程学院建筑学系上海200240 美国密西根大学建筑与城市规划学院

基于计算机模拟技术,提出一套适用于办公建筑光环境及能耗评价的方法:首先采用光环境测评软件Daysim,从全年动态的角度对典型办公建筑的天然光光环境进行计算分析,依据办公建筑照明设计标准中对光环境指标的要求,考察不同外窗系统下天... 详细信息

基于计算机模拟技术,提出一套适用于办公建筑光环境及能耗评价的方法:首先采用光环境测评软件Daysim,从全年动态的角度对典型办公建筑的天然光光环境进行计算分析,依据办公建筑照明设计标准中对光环境指标的要求,考察不同外窗系统下天然光的利用率;并在此基础上,得到室内人工照明的需求度,选用动态环境能耗模拟软件TRNSYS,进一步得到建筑逐时的人工照明及采暖空调能耗;通过综合权衡光环境及能耗方面的性能,评选最优化方案,有效地指导建筑室内照明设计。

关键词：办公建筑光环境评价能耗模拟照明设计

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新型农村社会养老保险政策效果评估——收入、贫困、消费、主观福利和劳动供给

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经济学（季刊） 2014年第4期13卷 203-230页

作者：张川川 John giles 赵耀辉中央财经大学经济学院世界银行发展研究部北京大学国家发展研究院

关键词：新型农村社会养老保险断点回归双重差分

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Chemical Kinetics and Mechanism

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丛书名： The Molecular World

2002年

作者： The Open University giles Clark M Mortimer P G Taylor Lesley E Smart Lesley E Smart giles Clark

ISBN: (数字)9781847557803

ISBN: (纸本)0854046704;9780854046706;9781847557803

Chemical Kinetics and Mechanism considers the role of rate of reaction. It begins by introducing chemical kinetics and the analysis of reaction mechanism, from basic well-established concepts to leading edge research. Organic reaction mechanisms are then discussed, encompassing curly arrows, nucleophilic substitution and E1 and E2 elimination reactions. The book concludes with a Case Study on Zeolites, which examines their structure and internal dimensions in relation to their behaviour as molecular sieves and catalysts. The accompanying CD-ROM contains the "Kinetics Toolkit", a graph-plotting application designed for manipulation and analysis of kinetic data, which is built into many of the examples, questions and exercises in the text. There are also interactive activities illustrating reaction mechanisms. The Molecular World series provides an integrated introduction to all branches of chemistry for both students wishing to specialise and those wishing to gain a broad understanding of chemistry and its relevance to the everyday world and to other areas of science. The books, with their Case Studies and accompanying multi-media interactive CD-ROMs, will also provide valuable resource material for teachers and lecturers. (The CD-ROMs are designed for use on a PC running Windows 95, 98, ME or 2000.)

关键词： Chemical kinetics.

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Thread-based multiplexed sensor patch for real-time sweat monitoring

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npj Flexible Electronics 2020年第1期4卷 159-168页

作者： Trupti Terse-Thakoor Meera Punjiya Zimple Matharu Boyang Lyu Meraj Ahmad Grace E.giles Rachel Owyeung Francesco Alaimo Maryam Shojaei Baghini Tad TBrunyé Sameer Sonkusale Department of Electrical and Computer Engineering Tufts UniversityMedfordMA02155USA Department of Electrical Engineering Indian Institute of Technology(IIT)BombayMumbai400076India Center for Applied Brain and Cognitive Sciences MedfordMA02155USA U.S.Army Combat Capabilities Development Command Soldier CenterNatickMA01760USA Department of Chemical and Biological Engineering Tufts UniversityMedfordMA02155USA Tufts University Department of PsychologyMedfordMA02155USA

Sensor platforms that exploit the fibrous textile threads as substrates offer great promise since they can be directly sewn,woven or stitched on to any *** can also be placed directly in intimate contact with the *** this work,we present a thread-based sensing platform in the form of a multiplexed sensing patch for continuous simultaneous on-skin monitoring of *** patch performs real-time,on-body measurements of important biomarkers present in sweat such as electrolytes(sodium and ammonium ions),metabolites(lactate)and acidity(pH).Flexible threads coated with conductive inks were used as sensing *** potentiometric detection of electrolytes and pH was made possible through ion-selective membrane deposition and pH-sensitive polyaniline coating on threads,*** amperometric enzymatic sensing scheme with lactate oxidase was used for the detection of *** array of the thread sensors is integrated onto a patch with connectivity to a miniaturized circuit module containing a potentiostat,microprocessor and wireless circuitry for wireless smartphone *** in vitro validation and an in vivo human pilot study involving a maximal exertion test show the promise of this platform for real-time physiological monitoring of human performance/fitness under stress,as well as diagnostic monitoring through sweat analysis.

关键词： patch Sensor monitoring

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Measuring free tissue sulfide

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Advances in Biological Chemistry 2012年第4期2卷 360-365页

作者： Abel Damien Ang Andreas Konigstorfer Greg Ian giles Madhav Bhatia Deptartment of Pathology University of Otago Christchurch New Zealand Deptartment of Pharmacology & Toxicology University of Otago Dunedin New Zealand

Hydrogen sulfide is synthesized endogenously in mammals and has been shown to have both physiological and pathological functions. So far there has been little agreement as to the actual levels of endogenous sulfide under physiological or pathological conditions;this is partly due to the complexity involved in measuring free sulfides due to H2S volatility, oxidation, reactivity and the presence of bound labile sulfur in tissues. In this report we describe a method of measuring free tissue sulfides using a zinc sulfide precipitation and wash method. It is an indirect method that measures the sulfide difference between samples prepared at pH 9 and pH 6, assuming that at pH 9 free sulfides would be retained in solution, while at pH 6 free sulfides would volatilize during sample preparation. Using this approach we were able to measure appreciable amounts of free sulfides in mouse: lung, pancreas, liver and kidney at 0.036 + 0.006, 0.082 + 0.009, 0.215 + 0.016 and 0.323 + 0.031 nmole per mg of tissue respectively (n = 6).

关键词： Free Sulfide Measuring Tissue Sulfide H2S

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