نتایج جستجو برای: gel diffusion

تعداد نتایج: 265686  

Journal: :Biotechnology progress 2010
Jun Hu Kazuhiko Miyanaga Yasunori Tanji

A simple two-chamber diffusion method was developed to study the diffusion properties of bacteriophages (phages). The apparent diffusion coefficients (D(app)) of Myoviridae phage T4 and filamentous phage fNEL were investigated, and the diffusion of the phages was found to be much slower than the diffusion of three antibiotics, ciprofloxacin, penicillin G, and tetracycline. D(app) of T4 and fNEL...

Journal: :Clinical chemistry 1974
L P Cawley W L Goodwin M Moeder P Dibbern

Human serum immunoglobulins are most frequently measured by single gel diffusion. Radioimmunoassay by use of antibodies bonded to particles is faster and more sensitive, precise, accurate, and specific. We adopted a solid-phase radioimmunoassay (SPRIA) technique, developed in our laboratory, to measure serum. lgG, and compared the results with those of a gel-diffusion method commonly used to me...

2014
J. C. Emberlin R. A. Lewis

Background: A special hydroxypropylmethylcellulose powder (Nasaleze®) has been used for the alleviation of nasal symptoms of allergic rhinitis since 1994. The efficacy of the product has been recently proven but the mechanism of action was still largely unknown. The aim of the study was to investigate the hypothesis that the gel formed after moisture absorption in the nose might act as mechanic...

Journal: :Biotechnology and bioengineering 1996
M S Shoichet R H Li M L White S R Winn

The present studies were undertaken to evaluate the in vitro gel stability of the hydrogels alginate and agarose. Gel strength (of alginate and agarose) and protein diffusion (of alginate only) were shown to correlate with gel stability and to be useful techniques to monitor gel stability over time. The gel strengths of alginate and agarose were followed for a 90-day period using gel strength a...

Journal: :Applied microbiology 1974
D M Myers V M Varela-Díaz E A Coltorti

The microslide gel-diffusion and macro-tube agglutination techniques to detect Brucella canis antibodies in dogs were compared. Sera from dogs experimentally infected with B. canis and a random sample of dog sera with unknown histories of exposure to this organism were examined. The results of the gel-diffusion method employing specific rough Brucella saline-extract antigens of B. canis and Bru...

Journal: :iranian journal of pharmaceutical sciences 0
mitra jelvehgari department of pharmaceutics, faculty of pharmacy,tabriz university of medical sciences, tabriz, iran mohammad reza rashidi department of medicinal chemistry, faculty of pharmacy, tabriz university of medical sciences, tabriz, iran hedayte samadi department of pharmaceutics, department of medicinal chemistry, faculty of pharmacy, tabriz university of medical sciences, tabriz, iran

gel dosage forms are successfully used as drug delivery systems considering their ability to control drug release and to protect medicaments from a hostile environment. the aim of this work was to investigate the properties of carbopol 934p polymeric system in water-misible cosolvents such as glycerin and alcohol. benzocaine is a local anesthetic and the mucosal gel formulation is applied in th...

2008
Hacène Boukari Ferenc Horkay

We have developed an optical chamber for studying the effect of swelling or shrinking of a gel on the translational diffusion of fluorescent nanoprobes embedded in the gel. On one side of the chamber, the gel is in contact with a hydrating or dehydrating polymeric solution through a porous membrane, allowing control of the rate of hydration or dehydration of the gel. On the other side, a laser ...

2003
Weimin Zhang Irina Gaberman Malgorzata Ciszkowska

Effect of the volume phase transition on the diffusion and concentration of molecular probes was studied in temperature-responsive polymeric hydrogels. Results were compared for two gels, poly(N-isopropylacrylamide), NIPA, and poly(N-isopropylacrylamide-co-acrylic acid), NIPA-AA. These gels undergo discontinuous, reversible volume phase transition as a response to temperature changes; this tran...

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