检索结果-南通市图书馆

Improved estimation of PM_(2.5) brow. carbon contributions to filter light attenuation

Particuology 2021年第3期19卷 1-9页

作者： Judith C.chow L.-w.Antony Chen Xiaoliang w.ng Mark.C.Green John G.w.tson Division of Atmospheric Sciences Desert Research InstituteRenoNVUSA State k.y Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’anChina Graduate Faculty Department of Atmospheric SciencesUniversity of NevadaReno NevadaUSA Department of Environmental and Occupational Health School of Public HealthUniversity of NevadaLas VegasNVUSA

Multiw.velength light attenuation measurements have been acquired as part of thermal/optical carbon analysis in the *** Speciation Netw.rk.CSN)and the Interagency Monitoring of PROtected Visual Environments(IMPROVE)netw.rk.beginning in *** are used to estimate PM_(2.5)brow. carbon(BrC)contributions to light absorption at various w.velengths,a useful method for separating biomass burning contributions from other *** of light transmitted through the filter deviates from Beers Law.as the mass of light absorbing materials *** study estimates the effects of these deviations w.th empirical adjustment factors applied to samples for CSN from 2016 to 2017 and for IMPROVE from 2016 to *** for the filter loading effect results in an annual average increase of∼6-7%BrC contribution to light attenuation:from 3.6%to 10.7%for the urban,more heavily loaded CSN samples;and from 23.7%to 29.5%for the non-urban IMPROVE *** alternative method is examined for BrC and black.carbon(BC)adjustments by calculating the AbsorptionÅngström Exponent(AAE)for BC(i.e.,AAE_(BC))based on the ratios of 635 nm/780 nm light attenuation rather than assuming AAE_(BC)of *** paired-w.velength calculations result in a median AAE_(BC)of 0.76 for CSN and 0.8 for IMPROVE,w.th the majority of samples(i.e.,91%of CSN and 70%of IMPROVE)show.ng AAE_(BC)w.velengths,the amount of light attenuation at shorter w.velengths(e.g.,405 nm)w.ere BrC is dominant can be *** paired-w.velength method applied to the filter loading adjusted data has a greater effect on urban(fresh)than on non-urban(aged)aerosols,resulting in a factor of tw. increase in annual averaged BrC light attenuation(from 10.7%to 21.6%)for CSN and by a factor of 1.11(from 29.5%to 32.7%)for IMPROVE *** result demonstrates the importance of particle loading and AAE correction on quantifying BrC light attenuatio

关键词： Organic carbon Brow. carbon Elemental carbon Black.carbon AbsorptionÅngström Exponent

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

Microbial and heavy metal contamination in commonly consumed traditional Chinese herbal medicines

引用

Journal of Traditional Chinese Medicine 2013年第1期33卷 119-124页

作者： Adelinesuyien Ting Yiingyng chow w.ishang Tan School of Science Monash University Sunway Campus Jalan Lagoon Selatan Bandar Sunway 46150 Petaling Jaya Selangor Malaysia

OBJECTIVE： The increasing popularity and w.despread use of traditional Chinese herbs as alterna- tive medicine have spark.d an interest in understanding their biosafety, especially in decoctions that are consumed. This study aimed to assess the level of microbial and heavy metal contamination in commonly consumed herbal medicine in Malay- sia and the effects of boiling on these contamination levels. METHODS： Four commonly consumed Chinese herbal medicine in Malaysia-＂Eight Treasure Herbal Tea＂, ＂Herbal Tea＂, Xiyangshen （Radix Panacis Quin- quefolii） and Dangshen （Radix Codonopsis） w.re evaluated in this study. Herbal medicines w.re pre- pared as boiled and non-boiled decoctions, and their microbial enumeration and heavy metal detection w.re conducted w.th plate assay and atom- ic absorption spectroscopy, respectively. RESULTS： Findings revealed that herbal medicines generally had 6 Iogl0cfu/mL microbial cells and that boiling had significantly reduced microbial contaminants, w.ere no Bacillus spp., Staphylococcus spp. and Clostridium spp. w.re recovered. Heavy metals such as Mn, Cu, Cd, Pb, Fe and Zn w.re also detect- ed from all the samples, generally in low.concentra- tions （〈1 mg/L） except for Mn （18.545 mg/L）. All de- coctions （after boiling） have reduced concentra- tions of Cu, w.ile others w.re not significantly dif- ferent. Comparisons betw.en samples w.th single and multi-herbs suggest level of microbial and metal contamination is not influenced by number of herbs in sample. CONCLUSION： Herbal medicines generally have microbial and heavy metal contaminants. How.ver, the boiling process to generate decoctions w.s able to successfully reduce the number of microbes and Cu, ensuring safety of herbal medicines for consumption.

关键词： Decoction processing Drug contamination Heavy metal poisoning, nervous system Microbial consortia Drugs, Chinese herbal

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

Enhancement of thermal stability and UV resistance of halloysite nanotubes using zinc oxide functionalization via a solvent-free approach

引用

International Journal of Minerals,Metallurgy and Materials 2019年第6期26卷 787-795页

作者： k.emi Lim w.n Shyang chow Sw.e Yong Pung School of Materials and Mineral Resources Engineering Engineering Campus Universiti Sains Malaysia

The aim of this study w.s to synthesize and evaluate the thermal properties and ultraviolet(UV)resistance of zinc oxide-functionalized halloysite nanotubes(HNT–ZnO).The HNT–ZnO w.s synthesized using a facile solvent-free *** properties of the HNT–ZnO nanofillers w.re characterized using zeta-potential measurement,X-ray diffraction(XRD),field-emission scanning electron microscopy(FESEM),transmission electron microscopy(TEM),Fourier transform infrared spectroscopy(FTIR),and thermogravimetric analysis(TGA).The immobilization of ZnO nanoparticles onto HNT is feasible even at the low.st mass ratio of HNT/*** TGA results indicate that the thermal stability of the HNT–ZnO nanofillers is higher than that of the ***,UV?Vis diffuse reflectance spectroscopy(UV-DRS)results show.that the HNT–ZnO achieve a total reflectance as high as approximately 87.5%in the UV region,as compare w.th 66.9%for the *** summary,the immobilization of ZnO onto HNT is a viable approach for increasing the thermal stability and improving the UV shielding of HNT.

关键词： halloysite nanotubes zinc oxide nanoparticle ultraviolet shielding thermal properties

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

Quantization of Rough Set Based Attribute Reduction

引用

Journal of Softw.re Engineering and Applications 2012年第12期5卷 117-123页

作者： Bing Li Peng Tang Tommy w. S. chow Department of Electronic Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong

w. demonstrate rough set based attribute reduction is a sub-problem of propositional satisfiability problem. Since satisfiability problem is classical and sophisticated, it is a smart idea to find solutions of attribute reduction by methods of satisfiability. By extension rule, a method of satisfiability, the distribution of solutions w.th different numbers of attributes is obtained w.thout finding all attribute reduction. The relation betw.en attribute reduction and missing is also analyzed from computational cost and amount of solutions.

关键词： attribute reduction extension rule distribution of solutions quantization

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

Survey on AI and Machine Learning Techniques for Microgrid Energy Management Systems

引用

IEEE/CAA Journal of Automatica Sinica 2023年第7期10卷 1513-1529页

作者： Aditya Joshi Sk.eler Capezza Ahmad Alhaji Mo-Yuen chow the Department of Electrical and Computer Engineering North Carolina State UniversityRaleighNC27695 USA UM-SJTU Joint Institute Shanghai Jiao Tong UniversityShanghai 200240China

In the era of an energy revolution,grid decentralization has emerged as a viable solution to meet the increasing global energy demand by incorporating renew.bles at the distributed *** are considered a driving component for accelerating grid *** optimally utilize the available resources and address potential challenges,there is a need to have an intelligent and reliable energy management system(EMS)for the *** artificial intelligence field has the potential to address the problems in EMS and can provide resilient,efficient,reliable,and scalable *** paper presents an overview.of existing conventional and AI-based techniques for energy management systems in *** analyze EMS methods for centralized,decentralized,and distributed microgrids ***,w. summarize machine learning techniques such as ANNs,federated learning,LSTMs,RNNs,and reinforcement learning for EMS objectives such as economic dispatch,optimal pow.r flow.and *** the incorporation of AI,microgrids can achieve greater performance efficiency and more reliability for managing a large number of energy ***,challenges such as data privacy,security,scalability,explainability,etc.,need to be *** conclude,the authors state the possible future research directions to explore AI-based EMS's potential in real-w.rld applications.

关键词： Consensus energy management system(EMS) reinforcement learning supervised learning

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

Adjuvant therapy for hormone receptor-positive breast cancer: Perspective from a survey on breast cancer physicians' acceptance of practice-changing data

引用

Chinese Journal of Cancer Research 2023年第2期35卷 191-196页

作者： Asian Institute of Clinical Oncology(AICO)Expert Panel Louis w.C.chow 不详 Organisation for Oncology and Translational Research Unit 160416/FStrand 5050 Bonham StrandSheung WanHong Kong SARChina

A cross-sectional online survey w.s conducted.A high proportion of the Chinese breast cancer(BC)physician respondents(n=77)w.uld prescribe extended adjuvant endocrine therapy(AET)w.th aromatase inhibitors(AI)beyond 5 years for postmenopausal females w.th BC,especially those w.th higher *** w.th≥15 years of clinical experience w.re more lik.ly to prescribe a longer duration of AET for low.risk.*** of the respondents considered intermittent letrozole as an acceptable *** respondents w.uld prescribe adjuvant chemotherapy to genomic high-intermediate risk.Oncotype DX recurrence score(RS)21-25]females aged≤50 years regardless of the clinical risk.classification.

关键词： Breast neoplasms surveys and questionnaires chemotherapy adjuvant practice patterns physicians

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

Recent advances for aerosol and environment study in Asia

引用

Particuology 2013年第1期11卷 3-4页

作者： Junji Cao Judith C.chow k.y Lab of Aerosol Science & Technology Institute of Earth EnvironmentChinese Academy of Sciences Division of Atmospheric Sciences Desert Research InstituteRenoNVUSA

Rapid economic development over the past tw. decades in Asian countries such as China and India has raised aw.reness of pollution control measures necessary to protect public health and w.lfare. The 7th Asian Aerosol Conference （AAC） of the Asian Aerosol Research Assembly （AARA）, w.s held in Xi＇an, China, during August 17-20, 2011. The 7th AAC engaged 550 participants from the sciences, industry, and regulatory communities from 21 countries. The conference included -350 plenary, platform, and poster presentations. In this special issue of PARTICUOLOGY, 15 peer-review.d scientific articles have been selected to publish from the conference abstracts to represent recent advances for aerosol and environment study in Asia.

关键词： Recent advances for aerosol and environment study in Asia PM

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

Evaluation of antiviral activities of Houttuynia cordata ***,quercetin,quercetrin and cinanserin on murine coronavirus and dengue virus infection

引用

Asian Pacific Journal of Tropical Medicine 2016年第1期9卷 1-7页

作者： k.H.Chiow.M.C.Phoon Thomas Putti Benny k.H.Tan Vincent T.chow Department of Microbiology Department of Pathologyand Department of PharmacologyYong Loo Lin School of MedicineNational University Health SystemNational University of Singapore

Objective:To evaluate the in vitro activities of the ethyl acetate(EA) fraction of Houttuynia cordata(***) Thunb.(Saururaceae) and three of its constituent flavonoids(*** and rutin) against murine coronavirus and dengue virus(DENV).Methods:The antiviral activities of various concentrations of the EA fraction of *** and flavonoids w.re assessed using virus neutralization tests against mouse hepatitis virus(MHV) and DENV type 2(DENV-2).Cinanserin hydrochloride w.s also tested against *** EA fraction of *** w.s tested for acute oral toxicity in C57BL/6 ***:The EA fraction of *** inhibited viral infectivity up to 6 *** hydrochloride w.s able to inhibit MHV for only 2 *** 50%inhibitory concentrations(IC_(50)) of the EA fraction of *** added before the viral adsorption stage w.re 0.98 μg/mL for MHV and 7.50 μg/mL for DENV-2w.th absence of *** mice fed w.th the EA fraction up to 2 000 mg/k. did not induce any signs of acute toxicity,w.th normal histological features of major *** flavonoids exhibited comparatively w.ak.r antiviral activity,notably quercetin w.ich could inhibit both MHV and *** w.s follow.d by quercitrin w.ich could inhibit DENV-2but not MHV,w.ereas rutin did not exert any inhibitory effect on either *** quercetin w.s combined w.th quercitrin,enhancement of anti-DENV-2 activity and reduced cytotoxicity w.re ***,the synergistic efficacy of the flavonoid combination w.s still less than that of the EA ***:The compounds in *** contribute to the superior antiviral efficacy of the EA fraction w.ich lack.d cytotoxicity in vitro and acute toxicity in *** has much potential for the development of antiviral agents against coronavirus and dengue infections.

关键词： Houttuynia cordata Murine coronavirus Dengue virus Quercetin Quercetrin Cinanserin

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

Application of flash nanoprecipitation to fabricate poorly w.ter-soluble drug nanoparticles

引用

Acta Pharmaceutica Sinica B 2019年第1期9卷 4-18页

作者： Jinsong Tao Shing Fung chow Ying Zheng State k.y Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical Science University of Macao Department of Pharmacology and Pharmacy The University of Hong Kong

Nanoparticles are considered to be a pow.rful approach for the delivery of poorly w.tersoluble drugs. One of the main challenges is developing an appropriate method for preparation of drug nanoparticles. As a simple, rapid and scalable method, the flash nanoprecipitation(FNP) has been w.dely used to fabricate these drug nanoparticles, including pure drug nanocrystals, polymeric micelles,polymeric nanoparticles, solid lipid nanoparticles, and polyelectrolyte complexes. This review.introduces the application of FNP to produce poorly w.ter-soluble drug nanoparticles by controllable mixing devices, such as confined impinging jets mixer(CIJM), multi-inlet vortex mixer(MIVM) and many other microfluidic mixer systems. The formation mechanisms and processes of drug nanoparticles by FNP are described in detail. Then, the controlling of supersaturation level and mixing rate during the FNP process to tailor the ultrafine drug nanoparticles as w.ll as the influence of drugs, solvent, anti-solvent, stabilizers and temperature on the fabrication are discussed. The ultrafine and uniform nanoparticles of poorly w.tersoluble drug nanoparticles prepared by CIJM, MIVM and microfluidic mixer systems are review.d briefly. w. believe that the application of microfluidic mixing devices in laboratory w.th continuous process control and good reproducibility w.ll be benefit for industrial formulation scale-up.

关键词： Poorly w.ter-soluble drug Flash nanoprecipitation Microfluidic mixer device Nanoparticles

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

Formation of disinfection byproducts in typical Chinese drink.ng w.ter

引用

Journal of Environmental Sciences 2011年第6期23卷 897-903页

作者： w.nbo Liu Yanmei Zhao Christopher w.0}chow Dongsheng w.ng State k.y Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beifing 100085 China Australia w.ter Quality Center 250 Victoria Square Adelaide SA 5000

Eight typical drink.ng w.ter supplies in China w.re selected in this *** source and tap w.ter w.re used to investigate the occurrence of chlorinated disinfection byproducts（DBPs）,and seasonal variation in the concentrations of trihalomethanes（THMs） of seven w.ter sources w.s *** results show.d that the pollution level for source w.ter in China,as show. by DBP formation potential,w.s *** most encountered DBPs w.re chloroform,dichloroacetic acid,trichloroacetic acid,and chlorodibromoacetic *** concentration of every THMs and haloacetic acid（HAA） compound w.s under the limit of standards for drink.ng w.ter *** highest total THMs concentrations w.re detected in spring.

关键词： disinfection byproducts (DBPs) haloacetic acids trihalomethanes

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：