检索结果-南通市图书馆

Effects of type of packaging material on physicochemical and sensory properties of olive oil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2011年第4期4卷 66-72页

作者： taha m.rababah Hao Feng Wade Yang Khalil Eriefej mohamad Al-Omoush Faculty of Agriculture Jordan University of Science and TechnologyP.O.Box 3030Irbid 22110Jordan Food and Bio-process Engineering Department of Food Science and Human NutritionUniversity of Illinois at Urbana-Champaign382F Agricultural Engineering Sciences BuildingUrbanaIL 61801USA Food Processing Engineering Department of Food Science and Human NutritionUniversity of FloridaP.O.Box 110370GainesvilleFL 32611-0370USA

This study was performed to evaluate changes in physicochemical and sensory attributes of olive oil stored in different packaging materials for up to 60 *** olive oil samples from a local company(Ajlon-Jordan)were stored in containers made from glass,tinplate,and plastic for two months at 25℃with quality attributes analyzed at selected time *** results showed that as time increased from 0 to 60 days the acidity and peroxide values(PV)of the oil increased while antioxidant activities,total phenolics,and sensory attributes *** samples in the glass container exhibited the lowest acidity(1.25%to 1.53%)and PV(6.13 to 7.17 milliequivalents meq/kg)values followed by those stored in the plastic and tinplate *** lowest antioxidant activities and total phenolics values were recorded in oil from the tinplate container while no significant difference(p≤0.05)was found for samples in the glass and plastic *** oil in the tinplate container had the highest values of sedimentation(0.17%).The glass container provided the best protection to oil samples as indicated by the best sensory properties,followed by plastic and tinplate containers.

关键词： packaging olive oil antioxidants sensory evaluation

Effects of drying process on total phenolics,antioxidant activity and flavonoid contents of common mediterranean herbs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2015年第2期8卷 145-150页

作者： taha m.rababah muhammad Al-u'datt mohammad Alhamad majdi Al-mahasneh Khalil Ereifej Juan Andrade Bayan Altarifi Ali Almajwal Wade Yang Faculty of Agriculture Jordan University of Science and TechnologyIrbid 22110Jordan Faculty of Engineering Jordan University of Science and TechnologyIrbid 22110Jordan Department of Food Science and Human Nutrition University of Illinois at Urbana-ChampaignUrbana Illinois 61801USA Department of Community Health Sciences College of Applied Medical SciencesKing Saud UniversityRiyadh 11451Saudi Arabia Department of Food Science and Human Nutrition University of FloridaGainesville Florida 32611USA

Four different fresh and dried herb species(sage,thyme,mint and lemonbalm)were evaluated to study the effect of drying process on the total phenolics,antioxidant activity,flavonoid contents and color *** mint had the highest contents of total phenolics(335.4 mg GAE/100 g),whereas lower levels were respectively found in sage(316.4 mg GAE/100 g)followed by lemonbalm(303.2 mg GAE/100 g)and thyme(299.2 mg GAE/100 g).Dry processing significantly decreased the phytochemical contents of all investigated *** to air drying,total phenolics,antioxidant activity and flavonoids content in herbs decreased apparently by oven *** mint had the highest antioxidant activity(87.46%)and flavonoids content(298.51 mg CE/100 g),while the fresh sage,thyme and lemonbalm were found to have antioxidant activity values of 86.81%,86.56% and 85.26%,*** showed that air drying herbs contained more total phenolics,antioxidant activity,and flavonoids than oven drying herbs.

关键词： Herbs drying process antioxidant activity flavonoids

Effect of tehina processing and storage in the physical-chemical quality

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2016年第5期9卷 218-226页

作者： taha m.rababah muhammad Al-U’datt majdi Al-mahasneh mohammad Obaidat Ali Almajwal Aladdin Odeh Susan Brewer Wade Yang Faculty of Agriculture Jordan University of Science and TechnologyIrbid 22110Jordan Faculty of Engineering Jordan University of Science and TechnologyIrbid 22110Jordan Faculty of Veterinary medicine Jordan University of Science and TechnologyIrbid 22110Jordan Department of Community Health Sciences College of Applied Medical SciencesKing Saud UniversityRiyadh 11451Saudi Arabia Department of Food Science and Human Nutrition University of Illinois at Urbana-ChampaignUrbanaIL 6180USA Department of Food Science and Human Nutrition University of FloridaGainesvilleFL 32611-0370USA

The effect of tehina processing and storage during six months at 25℃and 35℃on total phenolics,antioxidant activity,anthocyanins,and fatty acid analysis was *** processing,storage period and temperature significantly(p≤0.05)decreased total phenolics,antioxidant activity and anthocyanins *** results showed that raw sesame seeds had the highest total phenolics(99.98 mg GAE/100 g)and lower levels were found in dehulled unroasted sesame seeds,tehina at zero time and roasted sesame seeds(62.53,60.61 and 47.03 mg GAE/100 g,respectively).In addition,tehina during storage showed a significant decrease in total phenolics(60.61 to 42.45 mg GAE/100 g).Raw sesame seeds had the highest antioxidant activity(0.51 mg/mL),while the tehina,dehulled unroasted and roasted sesame had antioxidant activity values of 1.21,1.35 and 1.79 mg/mL,***,antioxidant activity of tehina at zero time was highest(1.21 mg/mL)and lowest was in tehina stored for six months(1.70 mg/mL).Sesame seeds and tehina had low levels of anthocyanins(1.26 and 0.50 mg cya-3-glu/100 g).Fatty acid analysis showed that sesame seeds(raw,dehulled unroasted and roasted)and tehina samples contain high percent of unsaturated fatty acid oleic(C18:1)and linoleic(C18:2).

关键词： sesame seeds phenols antioxidant activities anthocyanins

Expedited extraction of xylan from corncob by power ultrasound

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2009年第4期2卷 76-83页

作者： Wade Yang Vishnu K.Ajapur Kathiravan Krishnamurthy Hao Feng Ruijin Yang taha m.rababah Department of Food Science and Human Nutrition University of FloridaGainesvilleFL 32611USA Department of Food and Animal Sciences Alabama A&M UniversityNormalAL 35762USA Illinois Institute of Technology Summit-ArgoIL 60501USA Department of Food Science and Human Nutrition University of Illinois at Urbana-ChampaignUrbanaIL 61801USA School of Food Science and Technology Southern Yangtze UniversityWuxi 214036China Department of Food Science and Human Nutrition Jordan University of Science and TechnologyIrbid22110Jordan

Some lignocellulosic biomass like corncob contains a large amount of xylan,a valuable material for applications in food,chemical and pharmaceutical *** extraction of xylan is a time consuming process,requiring 12 to 24 hours to *** this study,the efficacy of power ultrasound for reducing the extraction time and increasing the xylan yield was *** acoustic energy densities(0.18 W/mL and 0.45 W/mL)of the power ultrasound were applied to corncob for 10,20,30,and 60 *** treated samples were steamed at 110,118 and 121℃for 30 *** 0.45 W/mL acoustic energy density and 121℃steaming temperature,ultrasonic treatment was able to extract 39%of xylan in 43 *** contrast,the conventional treatment was able to extract only 34%of xylan in 24 *** ultrasound assisted extraction reduced the processing time by 97%in addition to yield increase by 14.7%.Power ultrasound can be a potential technology for enhanced xylan extraction from corncob to result in significant processing time savings.

关键词： Power ultrasound sonication lignocellulusic biomass xylan extraction corncob steaming

An Improved Security Scheme for IEC 61850mmS messages in Intelligent Substation Communication Networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of modern Power Systems and Clean Energy 2020年第3期8卷 591-595页

作者： taha Selim Ustun S.m.Suhail Hussain Fukushima Renewable Energy Institute AIST(FREA)FukushimaJapan Research Institute of the Energy Frontier TsukubaJapan

Advanced connectivity in substations brings along cybersecurity considerations. Especially, the use of standardized data objects and message structures stipulated by IEC 61850 makes them much more vulnerable to unauthorized access and manipulation. In order to tackle these vulnerabilities, different methods are investigated by researchers all over the world. An important aspect of such efforts is the real-time performance consideration since power systems are bound by the rules of physics and all control/communication tasks need to be completed in a certain time frame. Security schemes for substation communication have been proposed in the recent literature. However, they must be improved to ensure a full security solution. Recently published IEC 62351 standard aims to fill this gap. Node authentication is vital for substation communication networks based on IEC 61850 to mitigate a variety of attacks such as man-in-the-middle(mITm) attack. This short communication presents a node authentication mechanism based on transport layer security(TLS) with certificates to address this knowledge gap. It also investigates the real-time performance by implementing the proposed scheme with Python.

关键词： IEC 62351 standard certificate authority cer-tificate-based authentication cybersecurity smart grid

mitigation of the blast load effects on a building structure using newly composite structural configurations

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2021年第1期17卷 75-84页

作者： Ahmed K.taha m.S.Zahran Zhengguo Gao School of Transportation Science and Engineering Beihang University(Beijing University of Aeronautics and Astronautics)Beijing100191PR China Department of Civil Engineering Military Technical CollegeEgypt

In this study,a nonlinear three-dimensional hydrocode numerical simulation was carried out using AUTODYN-3D to investigate the effect of blasting of a high explosive material(TNT)against several configurations of the composite *** numerical models were carried out to study the effect of varying the thickness of the walls and the effect of adding an air layer or aluminum foam layer inside two layers of concrete in mitigating the effect of blast waves on the structure *** results showed that increasing the thickness of walls has a good effect on mitigating the effect of blast *** a layer of air was added,the effect of blast waves was exaggerated,while when a layer of aluminum foam was added the blast wave effects were mitigated with a reasonable percentage.

关键词： Concrete structures Blast waves Numerical simulation TNT

Reliability analysis of earth slopes using hybrid chaotic particle swarm optimization

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2011年第5期18卷 1626-1637页

作者： m.Khajehzadeh m.R.taha A.El-Shafie Civil and Structural Engineering Department University Kebangsaan MalaysiaBangi43600SelangorMalaysia

A numerical procedure for reliability analysis of earth slope based on advanced first-order second-moment method is presented,while soil properties and pore water pressure may be considered as random *** factor of safety and performance function is formulated utilizing a new approach of the morgenstern and Price *** evaluate the minimum reliability index defined by Hasofer and Lind and corresponding critical probabilistic slip surface,a hybrid algorithm combining chaotic particle swarm optimization and harmony search algorithm called CPSOHS is *** comparison of the results of the presented method,standard particle swarm optimization,and selected other methods employed in previous studies demonstrates the superior successful functioning of the new method by evaluating lower values of reliability index and factor of ***,the presented procedure is applied for sensitivity analysis and the obtained results show the influence of soil strength parameters and probability distribution types of random variables on the reliability index of slopes.

关键词： reliability analysis stability assessment earth slopes particle swarm optimization harmony search

Review on nanocomposites fabricated by mechanical alloying

在线全文

学校读者我要写书评

暂无评论

International Journal of minerals,metallurgy and materials 2019年第9期26卷 1047-1058页

作者： mohammed A. taha Rasha A. Youness m.F. Zawrah Solid State Physics Department National Research CentreEl Buhouth St.Dokki 12622CairoEgypt Spectroscopy Department National Research CentreEl Buhouth St.Dokki 12622CairoEgypt Refractories Ceramics and Building Material DepartmentNational Research CentreEl Buhouth St.Dokki 12622CairoEgypt

Composites are composed of multiphase materials, where each phase has specific properties that differ from those of the other phases which can effect on the whole properties of composite. Nanocomposites are class of materials that contain at least one phase in the nanometric size range and can be produced by any suitable technique for preparing nanomaterials. Composites are an interesting class of materials that have recently been used in numerous applications, including structural, biomedical, electronics, and environmental applications. In composites, reinforcements might be fibers, particulates, or whiskers. mechanical alloying(mA) is a promising technique for producing nanocomposite materials that are difficult or impossible to prepare via conventional techniques. In this review, we provide an overview of nanocomposites prepared by the mA process. The mechanism of milling and other milling parameters are overviewed, and insights into sintering categories and parameters are also presented.

关键词： nanocomposites mechanical alloying fabrication sintering

Influence of axial load on the lateral pile groups response in cohesionless and cohesive soil

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2015年第2期9卷 176-193页

作者： Jasim m. ABBASA Zamri CHIK mohd Raihan taha Department of Civil Engineering Diyala University Diyala Baqhuba 32001 Iraq Department of Civil and Structural Engineering Universiti Kebangsaan Malaysia Bangi Selangor 43600 UKM Malaysia

The lateral response of single and group of piles under simultaneous vertical and lateral loads has been analyzed using a 3D finite element approach. The response in this assessment considered lateral pile displacement and lateral soil resistance and corresponding p-y curve. As a result, modified p-y curves for lateral single pile response were improved with respect to the influence of increasing axial load intensities. The improved plots can be used for lateral loaded pile design and to produce the group action design p-multiplier curves and equations. The effect of load combination on the lateral pile group response was performed on three pile group configurations (i.e., 2×1, 2×2 and 3×2) with four pile spacings (i.e., s = 2D, 4D, 6D and 8D). As a result, design curves were developed and applied on the actual case studies and similar expected cases for assessment of pile group behavior using improved p-multiplier. A design equation was derived from predicted design curves to be used in the evaluation of the lateral pile group action taking into account the effect of axial load intensities. It was found that the group interaction effect led to reduced lateral resistance for the pile in the group relative to that for the single pile in case of pure lateral load. While, in case of simultaneous combined loads, large axial load intensities (i.e., more than 6H, where H is lateral load values) will have an increase in p-multiplier by approximately 100% and will consequently contribute to greater group piles capacities.

关键词： piles pile group spacing configuration combined load