检索结果-南通市图书馆

Comparison of Fatty Acid and Proximate Composition between Holothuria edulisand Holothuria scabraCollected from Coastal Water of Sabah, Malaysia

引用

Advances in Bioscience and Biotechnology 2017年第3期8卷 91-103页

作者： Sujjat Al Azad Sitti Raehanah Muhamad Shaleh shafiquzzaman siddiquee Borneo Marine Research Institute University Malaysia Sabah Kota Kinabalu Malaysia Biotechnology Research Institute University Malaysia Sabah Kota Kinabalu Malaysia

The nutritional values of different species of sea cucumber are greatly concerned because of their dietary and curative properties. In this study, two species of sea cucumber, Holothuria edulis, a low-valued noncommercial species, and Holothuria scabra, a high-valued commercial species were selected to compare its proximate composition and fatty acids. H. edulis a prevalent species in coastal water of Sabah is not commercially importance like H. scabra. Sea cucumbers were captured live from the Sabah marine habitat. All samples were immediately eviscerated, freeze-dried and stored at 4°C in until analyzed. Silylating agent N, O-Bis(trimethylsilyl) trifluoroacetamide (BSTFA) was used to derivitization of fatty acid prior to gas chromatography-mass spectrometry (GC-MS) analysis. Proximate compositions (%), such as moisture, crude protein, crude lipids and ash were carried using standard methods. Major fatty acids in H. edulis and H. scabra were saturated fatty acid (SFA) accounted for 83.95% and 98.60%, respectively and dominated with Palmitic acids. Polyunsaturated fatty acid (PUFA), arachidonic acid of 16.05% was found only in H. edulis, but absent H. scabra. Proximate compositions (dry weight) were varied greatly within these two species. Moisture, crude protein, crude lipids and ash of 85.5%, 70.5%, 1.37% and 1.27% respectively were obtained in H. edulis. On the other hand 84.5% of moisture, 51.2% of crude protein, 0.27% of crude lipids and 4.44% of ashes were determined in H. scabra. Significantly higher protein (p H. edulis compare to H. scabra could be the choice of option for the utilization of this non commercial species as nutraceutical industry and also alternatives to reduce the pressure on heavily exploited species of H. scabra.

关键词： Fatty Acids Proximate Composition H. scabra and H. edulis

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

Phylogenetic Relationships of Termitomyces aurantiacusInferred from Internal Transcribed Spacers DNA Sequences

引用

Advances in Bioscience and Biotechnology 2015年第5期6卷 358-367页

作者： shafiquzzaman siddiquee Kobun Rovina Laila Naher Kenneth F. Rodrigues Md Akhter Uzzaman Biotechnology Research Institute Universiti Malaysia Sabah Kota Kinabalu Malaysia Faculty of Agro-Based Industry Universiti Malaysia Kelantan Jeli Campus-17600 Kelantan Malaysia Planning and Development Division Bangladesh Atomic Energy Commission Dhaka Bangladesh

Fungus-growing termites cultivate species of the mutualistic basidiomycete genus Termitomyces on a substrate called the fungal comb. Identification of fungal species based on morphological features is complicated, tedious, and prone to errors. As an alternative, nuclear ribosomal DNA sequences consisting of the internal transcribed spacers (ITS1 and ITS2) and 5.8S rDNA were used to identify Malaysian isolates of Termitomyces sp. The morphological characteristics and molecular data indicate that Malaysian Termitomyces isolated is clearly monophyletic and belongs to the Tricholomataceae family. The Malaysian isolates analyzed in this study represent the termite fungus species called T. aurantiacus.

关键词： Fungal Comb Internal Transcribed Spacers Morphological Feature Phylogenetic Relationship

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

Tolerance and biosorption capacity of Zn2+, Pb2+, Ni3+and Cu2+by filamentous fungi (Trichoderma harzianum, T. aureovirideand T. virens)

引用

Advances in Bioscience and Biotechnology 2013年第4期4卷 570-583页

作者： shafiquzzaman siddiquee Salleh N. Aishah Sujjat A. Azad Saili N. Shafawati Laila Naher Biology Department Faculty of Science Universiti Putra Malaysia Jln UPM Serdang Malaysia Biotechnology Research Institute Universiti Malaysia Sabah Jln UMS Kota Kinabalu Malaysia Borneo Marine Research Institute Universiti Malaysia Sabah Jln UMS Kota Kinabalu Malaysia

Heavy metal pollution has become a serious environmental issue in the last few decades. There is a need to develop potential technology that can remove toxic heavy metals ions found in polluted environments. This study was undertaken to determine the resistance levels of different concentrations of heavy metals using filamentous fungi of Trichoderma aureoviride, T. harzianum, and T. virens. Based on the results, the T. virens strain T128 gave the highest tolerance ability for Ni3+ and Pb2+ in a 1200 mg/L concentration. The accumulation and uptake capacity was determined by the maximum removal of Pb2+, Cu2+, and Ni3+ by a T. harzianum in liquid medium when compared to other fungi. The metal removal occurred at a concentration of 500 mg/L and was 13.48 g/g for Pb2+, 3.1254 g/g for Cu2+ and 0.8351 g/g for Ni3+. For Zn2+, the highest tolerance and uptake capacity of metal was recorded at 3.1789 g/g by T. virens.

关键词： Bioaccumulation Biosorption Heavy Metals Trichoderma Species Bioremediation Wastewater Treatment

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

A work-hardening and softening constitutive model for sand:modified plastic strain energy approach

引用

Acta Mechanica Sinica 2005年第1期21卷 76-86页

作者： FanglePeng M.S.A.siddiquee ShaomingLiao DepartmentofGeotechnicalEngineering TongiiUniversityShanghai200092China DepartmentofCivilEngineering TheUniversityofTokyoTokyo1138656Japan DepartmentofGeotechnicalEngineering TongiiUniversityShanghai200092China//DepartmentofCivilEngineeringTheUniversityofTokyoTokyo1138656Japan

The paper describes an energy-based constitutive model for sand, which is modified based on the modified plastic strain energy approach, represented by a unique relationship between the modified plastic strain energy and a stress parameter, independent of stress history. The modified plastic strain energy approach was developed based on results from a series of drained plastic strain compression tests along various stress paths on saturated dense Toyoura sand with accurate stress and strain measurements. The proposed model is coupled with an isotropically work-hardening and softening, non-associtated, elasto-plastic material description. The constitutive model concerns the inherent and stress system-induced cross-anisotropic elastic deformation properties of sand. It is capable of simulating the deformation characteristics of stress history and stress path, the effects of pressure level, anisotropic strength and void ratio, and the strain localization.

关键词： Sand Energy-based Hardening and softening Elasto-plastic model Stress-strain relation

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

Effect of wire tension on different output responses during wire electric discharge machining on AISI 304 stainless steel

引用

Defence Technology（防务技术） 2019年第4期15卷 541-544页

作者： Tina Chaudhary Arshad Noor siddiquee Arindam Kumar Chanda Department of Mechanical and Automation Engineering Indira Gandhi Delhi Technical University for Women Kashmere Gate New Delhi India Department of Mechanical Engineering Jamia Millia Islamia (a Central University) New Delhi India Department of Mechanical and Automation Engineering G.B. Pant Engineering College New Delhi India

WEDM is used in machining conductive materials where it is required to obtained complicated and intricate shapes with high *** applications are in the field of automobile,medical industries,aerospace *** is an economical machining option with short product development *** roughness,kerf width,Material removal rate,Recast layer hardness and surface microhardness in WEDM are most important *** this paper,effect of varied Wire tension on SR,KW,MRR,RCL hardness and surface microhardness on AISI 304 have been *** on time,pulse off time,current and dielectric fluid are taken as fixed *** show that Wire tension influences the SR,MRR and Surface microhardness and has no effect on kerf width in case of Stainless steel304.

关键词： Wire EDM Wire tension Material removal rate Surface roughness Kerf width Micro-hardness

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

Effect of varying spatial orientations on build time requirements for FDM process: A case study

引用

Defence Technology（防务技术） 2017年第2期13卷 92-100页

作者： Sandeep Rathee Manu Srivastava Sachin Maheshwari Arshad Noor siddiquee Division of Manufacturing Processes and Automation Engineering Netaji Subhas Institute of Technology Department of Mechanical Engineering Jamia Millia Islamia A Central University

In this research, effect of varying spatial orientations on the build time requirements for fused deposition modelling process is studied. Constructive solid geometry cylindrical primitive is taken as work piece and modeling is accomplished for it. Response surface methodology is used to design the experiments and obtain statistical models for build time requirements corresponding to different orientations of the given primitive in modeller build volume. Contour width, air gap, slice height, raster width, raster angle and angle of orientation are treated as process parameters. Percentage contribution of individual process parameter is found to change for build time corresponding to different spatial orientations. Also, the average of build time requirement changes with spatial orientation. This paper attempts to clearly discuss and describe the observations with an aim to develop a clear understanding of effect of spatial variations on the build time for Fused Deposition Modelling process. This work is an integral part of process layout optimization and these results can effectively aid designers specially while tackling nesting issues.

关键词： Fused deposition modeling Spatial orientation Process parameters Response Surface Methodology Build time

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

Effect of tool plunge depth on reinforcement particles distribution in surface composite fabrication via friction stir processing

引用

Defence Technology（防务技术） 2017年第2期13卷 86-91页

作者： Sandeep Rathee Sachin Maheshwari Arshad Noor siddiquee Manu Srivastava Division of Manufacturing Processes and Automation Engineering(MPAE) Netaji Subhas Institute of Technology Department of Mechanical Engineering Jamia Millia Islamia A Central University

Aluminium matrix surface composites are gaining alluring role especially in aerospace, defence, and marine industries. Friction stir processing(FSP) is a promising novel solid state technique for surface composites fabrication. In this study, AA6061/SiC surface composites were fabricated and the effect of tool plunge depth on pattern of reinforcement particles dispersion in metal matrix was investigated. Six varying tool plunge depths were chosen at constant levels of shoulder diameter and tool tilt angle to observe the exclusive effect of plunge variation. Process parameters chosen for the experimentation are speed of rotation, travel speed and tool tilt angle which were taken as 1400 rpm, 40 mm/min, and 2.5 °respectively. Macro and the microstructural study were performed using stereo zoom and optical microscope respectively. Results reflected that lower plunge depth levels lead to insufficient heat generation and cavity formation towards the stir zone center. On the other hand, higher levels of plunge depth result in ejection of reinforcement particles and even sticking of material to tool shoulder. Thus, an optimal plunge depth is needed in developing defect free surface composites.

关键词： Metal matrix composites Friction stir processing Tool plunge depth Microstructural characterization

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

Exploring the influencing factors for non-utilisation of healthcare facilities during childbirth:a special mixed-method study of Bangladesh and 13 other low-and middle-income countries based on Demographic and Health Survey data

引用

Family Medicine and Community Health 2019年第4期7卷 1-9页

作者： Tanjim siddiquee Henry Ratul Halder Md Akhtarul Islam Statistics Discipline Khulna UniversityKhulnaBangladesh

Objective To identify the associated factors affecting the decision regarding institutional delivery for pregnant women in 14 low-and middle-income countries(LMICs).Design A special mixed-method design was used to combine cross-sectional studies for harmonising data from Bangladesh and 13 other countries to obtain extended viewpoints on non-utilisation of institutional healthcare facilities during *** Demographic and Health Survey(DHS)data for 14 LMICs were used for the *** There are several kinds of datasets in the *** them‘Individual Women’s Records’was used as this study is based on all ever-married *** In the binary logistic and meta-analysis models for Bangladesh,ORs for birth order were 0.57 and 0.51 and for respondents’age were 1.50 and 1.07,*** all 14 LMICs,the most significant factors for not using institutional facilities during childbirth were respondents’age(OR 0.903,95%CI 0.790 to 1.032)and birth order(OR 0.371,95%CI 0.327 to 0.421).Conclusion Birth order and respondents’age were the two most significant factors for non-utilisation of healthcare facilities during childbirth in 14 LMICs.

关键词： income mixed birth

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

Multiple Response Optimization of Dimensional Accuracy of Nimonic Alloy Miniature Gear Machined on Wire Edm Using Entropy Topsis Andpareto Anova

引用

Computer Modeling in Engineering & Sciences 2021年第1期126卷 241-259页

作者： Tina Chaudhary Arshad Noor siddiquee Arindam Kumar Chanda Shafi Ahmad Irfan Anjum Badruddin Zahid A.Khan Department of Mechanical and Automation Engineering Indira Gandhi Delhi Technical University for WomenKashmere Gate110006India Department of Mechanical Engineering Jamia Millia Islamia(A Central University)New Delhi110025India Department of Mechanical and Automation Engineering G.B.Pant Engineering CollegeNew Delhi110020India Mechanical Engineering Department College of EngineeringKing Khalid UniversityAbha-61421AsirSaudi Arabia

The purpose of this research is to obtain the optimum cutting parameters to achieve the dimensional accuracy of Nimonic alloy miniature gear manufactured using Wire *** cutting parameters investigated in this study are current,pulse on time(PON),pulse off time(POFF),wire tension(WT)and dielectric *** glycol,nanopowder of alumina and oxygen are mixed to demineralized water to prepare novel dielectric *** in inner diameter,deviation in outer diameter,deviation in land and deviation in tooth width are considered to check the dimensional *** L_(16) is employed for experimental design and multiple response optimization is performed using Entropy TOPSIS and Pareto *** indicate that pulse on time is the most notable parameter for good dimensional accuracy followed by dielectric fluid,current,pulse off time and wire *** glycol mixed demineralized water is preferred for low dimensional *** optimum WEDM parameters are pulse on time at 20μs,Ethylene glycol mixed demineralized water dielectric fluid,current at 3 A,pulse off time at 4μs,and wire tension at 18 N.

关键词： Miniature gear multiple optimization dimensional accuracy entropy TOPSIS Pareto ANOVA

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

Friction stir welding of aluminum to copper—An overview

引用

Transactions of Nonferrous Metals Society of China 2017年第10期27卷 2113-2136页

作者： Nidhi SHARMA Zahid A.KHAN Arshad Noor siddiquee Department of Mechanical Engineering Jamia Millia Islamia New Delhi India

Components made by joining different materials are required in various engineering *** of suchcomponents is a challenging task due to the vast difference in mechanical,thermal and electrical properties of the materials *** stir welding(FSW)is capable of joining dissimilar materials such as aluminum(Al)and copper(Cu)and thereforeresearchers have used this novel process for dissimilar ***,several works pertaining to dissimilar joining,specifically Al?Cu,are available in the literature but they are scattered in different sources,which makes the task of gatheringinformation about dissimilar FSW of Al?Cu *** work has been written with an aim to provide all pertinentinformation related to dissimilar FSW of Al?Cu at one place to ease the problems of *** comprehensively covers andsummarizes the topics such as the effect of tool design and geometry,FSW process parameters,FSW strategies on mechanicalproperties,microstructure and formation of defects during dissimilar FSW of Al?*** addition,it also presents and discussesseveral variants of dissimilar FSW of Al?***,this work not only puts forth major findings of the previous researchers but alsosuggests future recommendations for dissimilar FSW of Al?Cu.

关键词： aluminium copper friction stir welding intermetallic compounds mechanical properties weld nugget zone

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：