检索结果-南通市图书馆

Study of parameters affecting infection risk from contaminated injectable products using multiple spot contamination model: a case study of insulin vials

引用

Journal of Chinese Pharmaceutical Sciences 2016年第11期25卷 832-837页

作者： mostafa Essam Eissa Hikma Pharma for Pharmaceutical Industry 2nd Industrial Zone

Infections of patients from consumption of contaminated pharmaceutical products constituted major health risk problems. Medicinal products are liable to microbial intrusion during in-use application. The current study focused on repeated contamination with constant level of microbiological burden by two bacteria viz. Staphylococcus aureus and Pseudomonas aeruginosa were used as dose-response models for infection through two different routes of administration. Nine different forms of insulin vials were subjected to this type of simulation study at constant assumed level of contaminations, preservative efficacy test(PET) and dose potency. Multi-spot contamination imitation study showed that initial fast rise in contamination, followed shortly by longer but steeper slope which finally turned into higher rate of contamination during the few last doses of the unit dosage forms, where the volume of the product became increasingly and progressively very small. When the probability of infection curves was constructed, both S. aureus and P. aeruginosa showed same pattern, with notably higher risk from septicemia route of the latter rather than subcutaneous route of the former. The present simulation study showed that continuous use of the same contaminated syringe progressively increased the risk of infection, especially at final few doses(between 3th and 10 th last doses depending on the dosage form sizes in the vials and the administration volumes) of the product. Small volume parenterals(SVP) are especially products at higher risk than the larger volume ones.

关键词： Insulin vials Staphylococcus aureus Pseudomonas aeruginosa Multi-spot contamination PET Simulation study

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

Analytical and Observational Investigation of Colors Effects on Drag Reduction in Penguins

引用

Journal of Bionic Engineering 2022年第4期19卷 1036-1053页

作者： Grace Tenorio Anna Zagrai William Allen mostafa Hassanalian Department of Mechanical Engineering New Mexico TechSocorroNM87801USA Cottonwood Valley Charter School SocorroNM87801USA Depertment of Biosciences Swansea UniversitySwanseaSA28PPUK

All 18 extant species of penguin are strongly countershaded,having dark dorsal and light ventral *** this paper,the thermal effects of this body color in penguins are investigated through analytical and observational ***,a thermal analysis that takes into account the environmental characteristics of penguins’habitats,fluxes,and morphology is used to analytically calculate penguin dorsal surface ***,a turbulent analytical solution for a heated boundary layer over a flat plate is applied to show that the dark color on the top of the penguins’bodies is very effective at skin drag *** verify this result,a 2D model penguin is computationally analyzed at different temperatures,confirming in principle underwater skin drag reduction through color-based surface warming with efficiency savings of up to 30%.Finally,to study how color-based increases in body surface temperatures are maintained through foraging dives,thermal cameras are used to measure the surface temperature of captive penguins before and after *** study shows conceptually that dark dorsal coloration in penguins could have a significant influence on in-water drag.

关键词： Animal coloration Drag Energy balance Irradiation Penguin Thermal imaging Skin friction

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

Correlating thermal conductivity of pure hydrocarbons and aromatics via perceptron artificial neural network (PANN) method

引用

Chinese Journal of Chemical Engineering 2017年第5期25卷 547-554页

作者： mostafa Lashkarbolooki Ali Zeinolabedini Hezave Mahdi Bayat School of Chemical Engineering Babol University of Technology Islamic Azad University Dashtestan Branch Department of Chemical Engineering Faculty of EngineeringUniversity of Bojnord

Accurate estimation of liquid thermal conductivity is highly necessary to appropriately design equipments in different industries. Respect to this necessity, in the current investigation a feed-forward artificial neural network(ANN) model is examined to correlate the liquid thermal conductivity of normal and aromatic hydrocarbons at the temperatures range of 257–338 K and atmospheric pressure. For this purpose, 956 experimental thermal conductivities for normal and aromatic hydrocarbons are collected from different previously published *** the modeling stage, to discriminate different substances, critical temperature(Tc), critical pressure(Pc)and acentric factor(ω) are utilized as the network inputs besides the temperature. During the examination, effects of different transfer functions and number of neurons in hidden layer are investigated to find the optimum network architecture. Besides, statistical error analysis considering the results obtained from available correlations and group contribution methods and proposed neural network is performed to reliably check the feasibility and accuracy of the proposed method. Respect to the obtained results, it can be concluded that the proposed neural network consisted of three layers namely, input, hidden and output layers with 22 neurons in hidden layer was the optimum ANN model. Generally, the proposed model enables to correlate the thermal conductivity of normal and aromatic hydrocarbons with absolute average relative deviation percent(AARD), mean square error(MSE), and correlation coefficient(R^2) of lower than 0.2%, 1.05 × 10^(-7) and 0.9994, respectively.

关键词： Thermal conductivity Artificial neural network Critical properties Hydrocarbons Aromatics

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

Direct Power Control Based on Dead-beat Function and Extended Kalman Filter for PV Systems

引用

Journal of Modern Power Systems and Clean Energy 2023年第3期11卷 863-872页

作者： mostafa Ahmed Ibrahim Harbi Ralph Kennel Mohamed Abdelrahem Chair of High-Power Converter Systems(HLU) Technical University of Munich(TUM)80333 MunichGermany Department of Electrical Engineering Faculty of EngineeringAssiut UniversityAssiut 71515Egypt Department of Electrical Engineering Faculty of EngineeringMenoufia UniversityShebin El-Koum 32511Egypt IEEE

In this paper,a new proposal for the implementation of the well-known direct power control(DPC)technique in grid-connected photovoltaic(PV)systems is ***,the DPC is executed using a look-up table procedure based on the error between the actual and reference values of the active and reactive ***,the structure of the DPC is simple and results in a fast transient behavior of the inner current loop(injected currents).Therefore,in the current study,the DPC is reformulated using a dead-beat *** this formulation,the reference voltage vector(RVV)is obtained in theα-βreference ***,the switching states for the inverter can be obtained based on the sign of the components of the *** suggested DPC is compared with the conventional one and other switching tables,which are intended for performance ***,an extended Kalman filter(EKF)is utilized to eliminate all grid-voltage ***,the switching frequency of the proposed technique is minimized without any need for weighting factors or cost function *** overall control technique is validated using a hardware-in-the-loop(HIL)experimental set-up and compared with other schemes under different operating conditions.

关键词： Photovoltaic(PV)system direct power control(DPC) sensorless control switching frequency minimization weighting factor

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

Effects of periodical application of bioactive peptides derived from cottonseed on performance,immunity,total antioxidant activity of serum and intestinal development of broilers

引用

Animal Nutrition 2021年第1期7卷 134-141页

作者： Nasir Landy Farshid Kheiri mostafa Faghani Department of Animal Science Shahrekord BranchIslamic Azad UniversityShahrekord***Iran

This experiment aimed to examine the effect of periodical application of bioactive peptides derived from cottonseed(BPC)in comparison with using sub-therapeutic doses of lincomycin and the excessive in-clusion of vitamin E on performance,immunity,total antioxidant capacity of serum and intestinal morphology of broiler chickens.A total of 240 one-d-old male broiler chicks with similar initial weight(Ross strain)were randomly assigned to 6 groups(8 chicks/pen):non-treated group(basal diet),basal diet supplemented with 2 mg/kg lincomycin,basal diet supplemented with 50 IU vitamin E,basal diet supplemented with 6 g BPC/kg in starter period,basal diet supplemented with 6 g BPC/kg in starter and grower periods and basal diet supplemented with 6 g BPC/kg throughout the whole *** highest final body weight was obtained in the group supplemented with BPC in starter and grower *** the finisher phase,broilers fed the diet containing BPC in the starter period and in the whole trial had significantly(P0.05).Broilers supplemented with BPC in starter and grower,and in the whole trial had significantly(P<0.05)higher antibody titers against sheep red blood cells(SRBC).The highest total antioxidant capacity was obtained in broilers supplemented with the excessive level of vitamin E,furthermore it tended to improve in broilers fed the diet containing BPC in the whole *** summary,the results of the study indicated that addition of BPC in broiler diets in the

关键词： Antibiotic Bioactive peptide Broiler Immunity Lincomycin Vitamin E

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

Energy Management of Echelon Flying Northern Bald Ibises with Different Wingspans and Variable Wingtip Spacing

引用

Journal of Bionic Engineering 2022年第1期19卷 44-61页

作者： mostafa Hassanalian Amir Mirzaeinia Niyem Bawana Frank Heppner Department of Mechanical Engineering New Mexico TechSocorroNM87801USA Department of Computer Science and Engineering New Mexico TechSocorroNM87801USA Department of Biological Sciences University of Rhode IslandKingstonRI02881USA

In this paper,the flocking flight of Northern Bald Ibises(Geronticus eremita)and their induced drag during the flock are *** Bald Ibises are long-range migratory *** birds fly in an echelon and V-shaped formation,possibly to reduce their drag;therefore,as a result,they may save energy to fly *** aerodynamic drag forces of each individual bird and the flock are modeled *** analysis shows how,during flocking flight,the drag force reduces as the size of the flock ***,wingtip spacing effects on the total drag of the flock are *** fraction of drag reduction of individual ibises is also *** initial arrangement scenarios are considered for flocks of ibises of different sizes in this *** shuffling algorithms are applied for position switching and energy balancing of the ibises during their *** is suggested that ibises can save energy by means of different arrangements of flock members during long *** results indicate that how different sizes of the birds can manipulate their positions to fly further and save energy during migration.

关键词： Drag Echelon Energy Flock Ibises Wingtips spacing

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

Relative performance of novel blast wave mitigation system to conventional system based on mitigation percent criteria

引用

Defence Technology（防务技术） 2021年第3期17卷 912-922页

作者： Moustafa Esa mostafa S.Amin Ahmed Hassan Eng.Mechanics Dept. Military Technical CollegeKobry ElkobbahCairoEgypt Civil Eng.Dept. Military Technical CollegeKobry ElkobbahCairoEgypt

Recent researches focused on developing robust blast load mitigation systems due to the threats of terrorist *** of the main embraced strategies is the structural systems that use mitigation *** are developed from a combination of structural elements and described herein as conventional *** the promising techniques is that redirect the waves propagation through hollow *** blast wave propagation through tubes provides an efficient system since it combines many blast wave phenomena,such as reflection,diffraction,and *** this research,a novel blast load mitigation system,employed as a protection fence,is developed using a technique similar to the technique of the bent tube in manipulating the *** relative performance of the novel system to the conventional system is evaluated based on mitigation percent *** of both systems are calculated through numerical *** proposed novel system proved to satisfy high performance in mitigating the generated blast waves from charges weight up to 500 kg TNT at relatively small standoff distances(5 m and 8 m).It mitigates at least 94%of the blast waves,which means that only 6%of that blast impulse is considered as the applied load on the targeted structure.

关键词： Blast mitigation Blast barriers Protection system Mitigation percent Protection evaluation

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

A new analytical solution for calculation the displacement and shear stress of fully grouted rock bolts and numerical verifications

引用

International Journal of Mining Science and Technology 2016年第6期26卷 1073-1079页

作者： Ghadimi mostafa Shariar Koroush Jalalifar Hossein Department of Mining Engineering Science and Research Branch Islamic Azad University Tehran *** Iran Faculty of Mining Metallurgy and Petroleum Engineering Amir Kabir University of Technology Tehran 158754413 Iran Department of Petroleum and Mining Engineering Shahid Bahonar University of Kerman Kerman *** Iran

In presence of difficult conditions in coal mining roadways, an adequate stabilization of the excavation boundary is required to ensure a safe progress of the construction. The stabilization of the roadways can be improved by fully grouted rock bolt, offering properties optimal to the purpose and versatility in use. Investigations of load transfer between the bolt and grout indicate that the bolt profile shape and spacing play an important role in improving the shear strength between the bolt and the surrounding strata. This study proposes a new analytical solution for calculation displacement and shear stress in a fully encapsulated rock bolt in jointed rocks. The main characteristics of the analytical solution consider the bolt profile and jump plane under pull test conditions. The performance of the proposed analytical solution, for three types of different bolt profile configurations, is validated by ANSYS software. The results show there is a good agreement between analytical and numerical methods. Studies indicate that the rate of displacement and shear stress from the bolt to the rock exponentially decayed. This exponential reduction in displacement and shear stress are dependent on the bolt characteristics such as: rib height, rib spacing, rib width and grout thickness, material and joint properties.

关键词： Fully grouted bolt Jointed rock Displacement Shear stress

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

A new approach to zinc–nickel separation using solution alkalinization method:application to a zinc plant residue

引用

Rare Metals 2020年第11期39卷 1341-1347页

作者： mostafa Aghazadeh Ghomi Javad Moghaddam Naghi Parvini Ahmadi Materials and Metallurgical Engineering Department Advanced Materials Research CenterSahand University of TechnologyTabriz51335-1996Iran Materials and Metallurgical Engineering Department University of ZanjanZanjan45371-38791Iran

The present investigation involves the separation of zinc and nickel from a sulfate solution using the acidic leaching of zinc plant residue after cadmium removal step as precursor(42.88 wt%Zn,8.50 wt%Cd and 2.33 wt%Ni).Separation of nickel from the solution was done by pouring it into a strong alkaline sodium hydroxide solution due to precipitation of nickel hydroxide and conversion of zinc to the soluble Zn(OH)_(4)^(2-)*** degrees of separation were reached by pouring more diluted solutions into the stronger alkaline *** clear pursue of the process,design of experimental methodology was applied for *** different washing steps on nickel-rich precipitates shows that the washing process decreases zinc content and thereby increases overall selectivity *** show that,at the optimized condition,Ni/Zn weight ratio in the solid product becomes about 104 times higher than the initial ratio in the initial feed solution and a nickel concentrate with 29.98 wt%Ni and 5.99 wt%Zn is *** the same time,the chemical analysis of filtrate shows only 4.4 mg·L^(-1)Ni in the alkaline zinc solution,which means that over 99%nickel is *** study on changes of zinc concentration with time shows that the process could be completed only after few minutes.

关键词： Zinc Nickel Precipitation Separation Alkalinization

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

Novel aspects for thermal stability studies and shelf life assessment of modified double-base propellants

引用

Defence Technology（防务技术） 2019年第3期15卷 300-305页

作者： Sherif Elbasuney Ashraf.M. A. Elghafour mostafa Radwan Ahmed Fahd Hosam mostafa Ramy Sadek Amr Motaz School of Chemical Engineering Military Technical College Kobry El-Kobba Cairo Egypt British University in Egypt Elshrouk city Cairo Egypt

Modified DB propellants, based on energetic nitramine(RDX) were manufactured by solventless extrusion process. Thermal stability and shelf life assessment of modified DB propellant were investigated. Shelf life assessment was evaluated using Van’t Hoff’s formula and artificial aging at 70℃ up to120 days. Quantification of total heat released and heat flow with aging time was conducted using differential scanning calorimetry(DSC) and thermal activity monitoring(TAMIII) respectively. Modified DB formulation based on 20 wt % RDX demonstrated enhanced thermal stability in terms of controlled heat flow, and slow decomposition reactions at elevated temperature. This formulation demonstrated extended service life up to 56 years compared with reference formulation. These novel finding was ascribed to the high thermal stability of RDX and its compatibility with DB constituents. This manuscript shaded the light on novel and effective approach for thermal stability via monitoring thermal activity with aging.

关键词： Double-base propellant Thermal stability Artificial aging Shelf-life assessment

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：