نتایج جستجو برای: particle filtration efficiency

تعداد نتایج: 587853  

Journal: :Advanced pharmaceutical bulletin 2014
Moorthi Chidambaram Kathiresan Krishnasamy

PURPOSE Nanoprecipitation is the convenient and commonly used method for the preparation of polymeric nanoparticles around 170 nm but yield particles with broad distribution, which require filtration step to produce particles with narrow distribution. Hence, the primary aim of the present study was to implement few modifications to the conventional nanoprecipitation method to reduce the mean pa...

In this article, multiple-product PVRP with pickup and delivery that is used widely in goods distribution or other service companies, especially by railways, was introduced. A mathematical formulation was provided for this problem. Each product had a set of vehicles which could carry the product and pickup and delivery could simultaneously occur. To solve the problem, two meta-heuristic methods...

Journal: :Analytical chemistry 2006
Masumi Yamada Minoru Seki

This paper describes an improved microfluidic device that enables hydrodynamic particle concentration and size-dependent separation to be carried out in a continuous manner. In our previous study, a method for hydrodynamic filtration and sorting of particles was proposed using a microchannel having multiple branch points and side channels, and it was applied for continuous concentration and sep...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده مدیریت 1392

data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...

Journal: :European journal of pharmaceutics and biopharmaceutics : official journal of Arbeitsgemeinschaft fur Pharmazeutische Verfahrenstechnik e.V 2016
Takuma Yamashita Yuki Takahashi Makiya Nishikawa Yoshinobu Takakura

Exosomes, which are expected to be delivery systems for biomolecules such as nucleic acids, are collected by several methods. However, the effect of exosome isolation methods on the characteristics of exosomes as drug carriers, such as recovery efficiency after sterile filtration and pharmacokinetics, has not been investigated despite the importance of these characteristics for the development ...

Journal: :American Journal of Infection Control 2021

•The public is sometimes exposed to damaging small particle aerosols including SARS-Cov-2. •During shortages, facepieces available the do not protect against aerosols. •We report designing homemade masks from home air purifier “true HEPA” filters. •These function similar an N95. Shortages of efficient filtering facepiece respirators leave vulnerable transmission infectious diseases in This stud...

Journal: :CoRR 2014
Giorgos Kouropoulos

At this article will be created a software written in visual basic for efficiency and penetration calculation in a fibrous filter medium for given values of particles diameter that are retained in the filter. Initially, will become report of mathematical models of air filtration in fibrous filters media and then will develop the code and the graphical interface of application, that are the base...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی مشهد - دانشکده دندانپزشکی 1391

دست یابی به سیل ایده آل در ترمیم های کامپوزیتی یکی از مهمترین اهداف دندانپزشکی ترمیمی در سالهای اخیر بوده است. بررسی نفوذ رنگ رایج ترین شیوه مطالعه ریز نشت است. این روش از ارزیابی سه بعدی حساسیت کمتری دارد. به دلیل فقدان مطالعات ارزیابی ریزنشت کامپوزیت ها به روشfluid filtration در دندان های شیری، در این تحقیق بر آن شدیم تا میزان ریزنشت باندینگهایself etch و total etchرا در دندان های شیری به روش...

Journal: :iranian journal of pharmaceutical research 0
sadjad riyahi-alam school of medicine, tehran university of medical sciences (tums soheila haghgoo 2pharmaceutical department, food & drug laboratory research center, food & drug organization (fdo), ministry of health ensihe gorji 2pharmaceutical department, food & drug laboratory research center, food & drug organization (fdo), ministry of health nader riyahi-alam 3medical physics & biomedical engineering department, school of medicine, tehran university of medical sciences (tums)

we developed biofunctionalized nanoparticles with magnetic properties by immobalizing diethyle-neglycol (deg) on gd2o3, and pegilation of small particulate gadolinium oxide (spgo) with two me-thoxy-polyethyleneglycol-silane (mpeg-silane 550 and 2000 da) using a new supervised polyol route, described recently. in conjunction to the previous study to achieve a high quality synthesis and increase ...

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