نتایج جستجو برای: hydrogel beads

تعداد نتایج: 25204  

Dr. Ahmed, M. Saeed

Due to the fact that many application processes take place at different temperature, better examining and understanding of swelling properties as a function of temperature is essential for such application. The temperature effect on the swelling properties of commercial polyacrylic acid (PAA) hydrogel beads was investigated as a function of time and temperature. Gel bead size, swelling equilibr...

2004
Nan Li

Chitosan, a natural polysaccharide, has increasingly been studied as an adsorbent for heavy metal removal in recent years. The amine groups in chitosan are generally known to be the main adsorption sites for heavy metal ions. However, due to the instability of chitosan in acidic solutions, chemical crosslinking has often been used to enhance the acidic resistance of the material. Since most of ...

Journal: :Carbohydrate Polymer Technologies and Applications 2021

Journal: :Chemistry 2021

Calcium alginate (CaALG) hydrogel beads and two sets of composite beads, formed from a combination calcium alginate/propylene glycol alginate/human serum albumin (CaALG/PGA/HSA) with the quaternary ammonium salt, (3-(trimethoxysilyl)propyl)-octadecyldimethylammonium chloride (QA), (CaALG/QA), were prepared. Bovine (BSA) was condensed glutaraldehyde (GLA) to form BSA/GLA hydrogel. The correspond...

Journal: :The Analyst 2011
Zongtai Qi Yinjiao Ma Lili Deng Haiping Wu Guohua Zhou Tomoharu Kajiyama Hideki Kambara

To digitally analyze expression levels of multiple genes in one reaction, we proposed a method termed as 'MDHB' (Multiplexed Digital-PCR coupled with Hydrogel Bead-array). The template for bead-based emulsion PCR (emPCR) was prepared by reverse transcription using sequence-tagged primers. The beads recovered from emPCR were immobilized with hydrogel to form a single-bead layer on a chip, and th...

Journal: :Biotechnology progress 2002
Mee Ryang Kim Ji Hoon Jeong Tae Gwan Park

Thermally sensitive poly(N-isopropylacrylamide, NIPAAm) hydrogel beads conjugated with a cell adhesive motif, GRGDY, were prepared and utilized as cell culture substrate for chondrocytes. They were produced to be uniform in size and distribution by using calcium alginate as a temporal mold. The RGD moieties were introduced, in a spatially selective manner, to the surface of the beads by conjuga...

Journal: :international journal of advanced biological and biomedical research 2013
ahmed mahdi saeed mohammad jassim hamzah

adsorption and water treatment of ca (ii) and mg (ii) hardness were investigated via adsorption of metal ions onto commercial polyacrylic acid hydrogel beads as a novel sorbent for metal ions (ca2+, mg2+) removal and water treatment. batch equilibrium technique was carried out under the influence of solution ph, contact time, sorbent dosage, initial metal concentration and competitive study. th...

2010
M. S. Khan B. K. Sridhar A. Srinatha

The purpose of this research was to develop and evaluate multiparticulates of alginate and chitosan hydrogel beads exploiting pH sensitive property for colon-targeted delivery of theophylline. Alginate and chitosan beads were prepared by ionotropic gelation method followed by enteric coating with Eudragit S100. All formulations were evaluated for particle size, encapsulation efficiency, swellab...

Journal: :Artificial Cells, Nanomedicine, and Biotechnology 2016

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