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纤维混纺比对纱线强度的影响

国际纺织导报 2022年第6期50卷 7-10页

作者： k.patel M.patel A.Solanki 王燕斌(译) 孟粉叶(校) 格拉西姆工业有限公司博拉纤维纺织研究和应用开发中心印度不详

纺纱厂可根据客户的需求,通过调整纤维混纺比提供各种混纺纱。多种纤维混纺有利于提高特定产品的质量,或提高纱线和织物的功能性。纤维混纺比对纱线强度和织物耐久性也有较大影响。纱线强度与织物耐久性有相关性,即纱线强度越大,织物耐... 详细信息

纺纱厂可根据客户的需求,通过调整纤维混纺比提供各种混纺纱。多种纤维混纺有利于提高特定产品的质量,或提高纱线和织物的功能性。纤维混纺比对纱线强度和织物耐久性也有较大影响。纱线强度与织物耐久性有相关性,即纱线强度越大,织物耐久性越好。如A和B两种纤维以50∶50的质量比混纺后,纱线的强度无法通过纤维A和B的算术平均强度进行预测,说明影响纱线强度的因素较多,如纤维长度、强度、纤维摩擦性能和纤维的线密度和纤维伸长率等。在诸多研究的基础上,现已建立了纱线强度与纤维长度、线密度、强度和摩擦性能的相关性,但纤维伸长对纱线强度的影响研究较少。文章讨论了纤维伸长对纱线强度的影响。

关键词：纤维混纺比纤维强度纱线强度伸长率纤维素纤维棉聚酯

Nanocellulose,a versatile platform:From the delivery of active molecules to tissue engineering applications

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Bioactive Materials 2022年第3期7卷 566-589页

作者： Tejal V.Patil Dinesh k.patel Sayan Deb Dutta keya Ganguly Tuhin Subhra Santra ki-Taek Lim Department of Biosystems Engineering Institute of Forest ScienceKangwon National UniversityChuncheon24341Republic of Korea Interdisciplinary Program in Smart Agriculture Kangwon National UniversityChuncheon24341Republic of Korea Deptarment of Engineering Design Indian Institute of TechnologyMadras600036India

Nanocellulose,a biopolymer,has received wide attention from researchers owing to its superior physicochemical properties,such as high mechanical strength,low density,biodegradability,and biocompatibility.Nanocellulose can be extracted from wide range of sources,including plants,bacteria,and algae.Depending on the extraction process and dimensions(diameter and length),they are categorized into three main types:cellulose nanocrystals(CNCs),cellulose nanofibrils(CNFs),and bacterial nanocellulose(BNC).CNCs are a highly crystalline and needle-like structure,whereas CNFs have both amorphous and crystalline regions in their network.BNC is the purest form of nanocellulose.The nanocellulose properties can be tuned by chemical functionalization,which increases its applicability in biomedical applications.This review highlights the fabrication of different surface-modified nanocellulose to deliver active molecules,such as drugs,proteins,and plasmids.Nanocellulose-mediated delivery of active molecules is profoundly affected by its topographical structure and the interaction between the loaded molecules and nanocellulose.The applications of nanocellulose and its composites in tissue engineering have been discussed.Finally,the review is concluded with further opportunities and challenges in nanocellulose-mediated delivery of active molecules.

关键词： Nanocellulose Chemical functionalization Drug delivery Protein delivery Plasmid delivery Tissue engineering

Proteomic Analysis of Bovine Nucleolus

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Genomics, Proteomics & Bioinformatics 2010年第3期8卷 145-158页

作者： Amrutlal k.patel Doug Olson Suresh k.Tikoo Vaccine and Infectious Disease Organization University of Saskatchewan Department of Veterinary Microbiology Western College of Veterinary Medicine University of Saskatchewan National Research Council Plant Biotechnology Institute University of Saskatchewan School of Public Health University of Saskatchewan

Nucleolus is the most prominent subnuclear structure, which performs a wide variety of functions in the eukaryotic cellular processes. In order to understand the structural and functional role of the nucleoli in bovine cells, we analyzed the proteomic composition of the bovine nucleoli. The nucleoli were isolated from Madin Darby bovine kidney cells and subjected to proteomic analysis by LC-MS/MS after fractionation by SDS-PAGE and strong cation exchange chromatography. Analysis of the data using the Mascot database search and the GPM database search identified 311 proteins in the bovine nucleoli, which contained 22 proteins previously not identified in the proteomic analysis of human nucleoli. Analysis of the identified proteins using the GoMiner software suggested that the bovine nucleoli contained proteins involved in ribosomal biogenesis, cell cycle control, transcriptional, translational and post-translational regulation, transport, and structural organization.

关键词： bovine nucleolus proteomics 1D SDS-PAGE SCX LC-MS/MS

Development and validation of a RP-HPLC method for the simultaneous determination of Embelin,Rottlerin and Ellagic acid in Vidangadi churna

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Journal of Pharmaceutical Analysis 2012年第5期2卷 366-371页

作者： Rakesh k.patel Vishal R.patel Madhavi G.patel S.k.patel College of Pharmaceutical Education and Research KhervaMehsanaIndia Department of Pharmacognosy Baroda College of PharmacyParul Group of InstitutesLimdaVadodaraGujarat 391760India Parul Institute of Pharmacy Parul Group of InstitutesLimdaVadodaraIndia

Vidangadi churna is a popular Ayurvedic formulation described in the chapter krimicikitsa of the Ayurvedic literature Cakradatta for the treatment of krimiroga. The preparation is a composite mixture of the fine powder of fruits of Vidang （Embelia ribs）, glandular trichomes of the fruits of kamala （Mallotus philippensis）, mature fruits of Harde （Terminalia chehula）, Saindhava and Yavakshara. The use of reversed phase C18 column eluted with gradient mobile phase of acetonitrile and water enabled the efficient separation of the chemical markers in 22 rain. Validation of the method was performed in order to demonstrate its selectivity, accuracy, precision, repeatability and recovery. All calibration curves showed good linear correlation coefficients （r2〉0.995） within the tested ranges. Three markers in Vidangadi churna were quantitied with respect to Embelin （0.647%, w/w）, Rottlerin （4.419%, w/w）, and Ellagic acid （0.459%, w/w）. lntraand inter-day RSDs of retention times and peak areas were less than 3.12%. The recoveries were between 99.66% and 102.33%. In conclusion, a method has been developed for the simultaneous quantification of three markers in Vidangadi churna. The RP-HPLC method was simple, precise and accurate and can be used for the quality control of the raw materials as well as formulations.

关键词： Vidangadi churnaEmbelin Rottlerin Ellagic acid RP-HPLC

Liquid chromatography electrospray ionization tandem mass spectrometry(LC/ESI-MS/MS) method for quantitative estimation of moxifloxacin in human plasma

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Journal of Chinese Pharmaceutical Sciences 2014年第3期23卷 159-164页

作者： Vipul.M.Vaghela Prajesh Prajapati Hetal k.patel A.R.College of Pharmacy and G.H.patel Institute of Pharmacy Institute of Research and Development Gujarat Forensic Sciences University Shree Swaminarayan Sanskar Pharmacy College

A rapid and sensitive liquid chromatography tandem mass spectrometry(LC-MS/MS) method has been developed and validated for the determination of moxifloxacin(MOXI) in human plasma. After a simple protein precipitation using acetonitrile, the post treatment samples were analysed on a C18 column interfaced with a Triple Quadropole Tandem Mass Spectrometer. Positive electrospray ionization was employed as the ionization source. The mobile phase consisted of 0.1% formic acid–acetonitrile(60:40, v/v). Ciprofloxacin(CIPRO) was used as an internal standard. The analyte and internal standard(CIPRO) were monitored in the multiple reaction monitoring mode(MRM). The mass transition ion-pair has been followed as m/z 402→358.2 for MOXI and 332→288.1 for CIPRO. The method was linear in the concentration range of 25–5000 ng/mL. The lower limit of quantification was 25 ng/mL. The intra- and inter-day precision(relative standard deviation) and accuracy(relative error) values were within 12.4%. Each plasma sample was analyzed within 3 min.

关键词： Moxifloxacin Ciprofloxacin Human plasma Liquid chromatography tandem mass spectrometry Electrospray ionization

Numerical Simulation of Heat Transfer in Rectangular Microchannel

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Advances in Applied Mathematics and Mechanics 2009年第2期1卷 231-241页

作者： Jun Yao Yufeng Yao Peter J.Mason Mayur k.patel Faculty of Engineering Kingston University104 Friars AvenueRoehampton ValeLondon SW153DWUnited Kingdom School of Computing and Mathematical Sciences University of Greenwich30 Park RowGreenwichLondon SE109LSUnited Kingdom

Numerical simulation of heat transfer in a high aspect ratio rectangular microchannel with heat sinks has been conducted,similar to an experimental study.Three channel heights measuring 0.3 mm,0.6 mm and 1 mm are considered and the Reynolds number varies from 300 to 2360,based on the hydraulic diameter.Simulation starts with the validation study on the Nusselt number and the Poiseuille number variations along the channel streamwise direction.It is found that the predicted Nusselt number has shown very good agreement with the theoretical estimation,but some discrepancies are noted in the Poiseuille number comparison.This observation however is in consistent with conclusions made by other researchers for the same flow problem.Simulation continues on the evaluation of heat transfer characteristics,namely the friction factor and the thermal resistance.It is found that noticeable scaling effect happens at small channel height of 0.3 mm and the predicted friction factor agrees fairly well with an experimental based correlation.Present simulation further reveals that the thermal resistance is low at small channel height,indicating that the heat transfer performance can be enhanced with the decrease of the channel height.

关键词： Computational fluid dynamics rectangular microchannel scaling effect thermal resistance

Residue determination ofβ-cyfluthrin and imidacloprid as mix formulation in/on chickpea(Cicer arietinum)pods and soil and its risk assessment

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Food Quality and Safety 2018年第2期2卷 75-81页

作者： Suchi Chawla Paresh G.Shah Anil R.patel Hemlatta k.patel kiran M.Vaghela Priti P.Solanki Pesticide Residue Laboratory AINP on Pesticide ResiduesICARUnit-9Anand Agricultural UniversityAnandGujaratIndia

OBJECTIVES:A field experiment was conducted at Agricultural Research Station for irrigated crops at Thasara,Anand Agricultural University,Anand,to study the dissipation and risk assessment ofβ-cyfluthrin and imidacloprid as combination product in/on chickpea.MATERIALS AND METHODS:Solomon 300 OD comprising 9 per centβ-cyfluthrin and 21 per cent imidacloprid was foliar sprayed at the doses of 18+42g a.***.ha−1(standard dose)and 36+84g a.***.ha−1(double dose).Totally three sprays were made at an interval of 1 week starting from fruiting stage.RESULTS AND DISCUSSIONS:The residues ofβ-cyfluthrin estimated using gas chromatograph with electron capture detector(GC-ECD)showed an initial deposit of 0.16 and 0.27μg g−1 in standard and double doses,respectively.The residues for corresponding doses persisted till 7th and 10th day after application and reached below determination level of 0.01μg g−1 on the 10th and 15th day,respectively.Imidacloprid was estimated using high performance liquid chromatography(HPLC)and showed initial deposits of 1.22 and 2.7μg g−1 in standard and double doses,respectively.Its levels reached below the determination level(0.01μg g−1)on the 15th day in green pods.Statistical analysis of dissipation kinetics showed thatβ-cyfluthrin followed zero-order kinetics in standard dose with half-life of 7.27 days.In double dose,the dissipation kinetics followed first-order kinetics with half-life of 9 days.Imidacloprid followed first-order kinetics in both the doses with half-life of 6.7 and 7.7 days.CONCLUSIONS:A pre-harvest interval(PHI)of 15 days is suggested.Theoretical risk assessment calculated as hazard quotient was less than 1,rendering the use of combination product as safe-provided proper PHI is followed.

关键词： chickpea β-cyfluthrin imidacloprid dissipation dissipation kinetics residue risk assessment pods.

Pareto optimization of WEDM process parameters for machining a NiTi shape memory alloy using a combined approach of RSM and heat transfer search algorithm

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Advances in Manufacturing 2021年第1期9卷 64-80页

作者： Rakesh Chaudhari Jay J.Vora S.S.Mani Prabu I.A.Palani Vivek k.patel D.M.Parikh Department of Mechanical Engineering School of TechnologyPandit Deendayal Petroleum UniversityRaisanGandhinagar 382007India Metallurgy Engineering and Materials Science Indian Institute of Technology IndoreIndore 453552India Discipline of Mechanical Engineering Indian Institute of Technology IndoreIndore 453552India Department of Industrial Engineering School of TechnologyPandit Deendayal Petroleum UniversityRaisanGandhinagar 382007India

Machining of shape memory alloys(SMAs)without losing the shape memory effect could immensely extend their applications.Herein,the wire electric discharge machining process was used to machine NiTi—a shape memory alloy.The experimental methodology was designed using a Box-Behnken design approach of the response surface methodology.The effects of input variables including pulse on time,pulse off time,and current were investigated on the material removal rate,surface roughness,and microhardness.ANOVA tests were performed to check the robustness of the generated empirical models.Optimization of the process parameters was performed using a newly formulated,highly efficient heat transfer search algorithm.Validation tests were conducted and extended for analyzing the retention of the shape memory effect of the machined surface by differential scanning calorimetry.In addition,2D and 3D Pareto curves were generated that indicated the trade-offs between the selected output variables during the simultaneous output variables using the multi-objective heat transfer search algorithm.The optimization route yielded encouraging results.Single objective optimization yielded a maximum material removal rate of 1.49 mm^(3)/s,maximum microhardness 462.52 HVN,and minimum surface roughness 0.11μm.The Pareto curves showed conflicting effects during the wire electric discharge machining of the shape memory alloy and presented a set of optimal non-dominant solutions.The shape memory alloy machined using the optimized process parameters even indicated a shape memory effect similar to that of the starting base material.

关键词： Shape memory alloy(SMA) Nitinol Wire electrical discharge machining(WEDM) Heat transfer search algorithm Differential scanning calorimetry(DSC)test Shape memory effect

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纤维素纤维运动服面料

国际纺织导报 2021年第9期49卷 44-46页

作者： A.Chakrabarty S.Bhaumik k.patel R.Nagpure A.Bansode 靳美琦(译) 孟粉叶(校) Grasim工业有限公司纺织研发中心(TRADC)(印度) 不详

旨在研究运动服面料中纤维素纤维含量的可行性和兼容性,特别是Aditya Birla集团开发的Birla莫代尔纤维,其针织结构面料的性能可与市售针织运动服面料相媲美。在运动服装中加入纤维素纤维有助于减少环境中的碳排放量,提高可持续性。基于... 详细信息

旨在研究运动服面料中纤维素纤维含量的可行性和兼容性,特别是Aditya Birla集团开发的Birla莫代尔纤维,其针织结构面料的性能可与市售针织运动服面料相媲美。在运动服装中加入纤维素纤维有助于减少环境中的碳排放量,提高可持续性。基于此,开发了不同的纱线和针织面料以增加运动服的商业附加值。以疏水纤维和亲水纤维比例约为60/40的褶裥织物和单面纬平针织和为研究对象,对作为运动服服用面料的首要要求即吸湿排汗及穿着舒适性能进行了考察。

关键词：运动服面料纤维素纤维吸湿性能舒适性