scholarly journals Immobilization of enzymes on alginic acid-polyacrylamide copolymers

1981 ◽  
Vol 23 (8) ◽  
pp. 1889-1892 ◽  
Author(s):  
M. D. K. Kumaraswamy ◽  
K. Panduranga Rao ◽  
K. Thomas Joseph ◽  
M. Santappa
Keyword(s):  
Alginic Acid ◽  
Immobilization Of Enzymes

Vernetzung wäßriger Alginsäure mittels der Vierkomponenten-Kondensation unter Einschluß-Immobilisierung von Enzymen / Crosslinking of Aqueous Alginic Acid by Four Component Condensation with Inclusion Immobilization of Enzymes

1991 ◽  
Vol 46 (9) ◽  
pp. 1261-1266 ◽  
Author(s):  
Stephan König ◽  
Ivar Ugi
Keyword(s):  
Lactate Dehydrogenase ◽  
Alginic Acid ◽  
Ugi Reaction ◽  
Immobilization Of Enzymes

The four component condensation (4 CC, Ugi reaction) of aqueous alginic acid with formaldehyde, difunctional amine and isocyanide components produces a gel. Enzymes, e.g. “acidic phosphatase” (AP) and L-(+)-lactate dehydrogenase (LDH), can be immobilized by inclusion in the above crosslinked alginic acid. The enzymes retain some of their activity (LDH: 8-10%; AP: 82-87%).

Use of Exo-polygalacturonase to Improve Extraction Yields of Alginic Acid from Sea Mustard (Undaria pinnatifida)

2002 ◽  
Vol 7 (3) ◽  
pp. 317-319
Author(s):  
Seung-Cheol Lee ◽  
Jeong-Hoon Oh ◽  
Yong-Il Hwang ◽  
Jeong-Mok Kim
Keyword(s):  
Alginic Acid ◽  
Undaria Pinnatifida ◽  
Sea Mustard

Protective Activity of Fucoidan and Alginic Acid against Free Radical-Induced Oxidative Stress under in Vitro and Cellular System

2007 ◽  
Vol 12 (4) ◽  
pp. 191-196 ◽  
Author(s):  
Mi-Jung So ◽  
Boh-Kyung Kim ◽  
Mi-Jin Choi ◽  
Kun-Young Park ◽  
Sook-Hee Rhee ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Free Radical ◽  
Alginic Acid ◽  
Cellular System ◽  
Protective Activity

A study on the fouling phenomena of a microfiltration membrane

2004 ◽  
Vol 4 (5-6) ◽  
pp. 223-231
Author(s):  
H.-H. Yeh ◽  
W.-H. Wang
Keyword(s):  
Salicylic Acid ◽  
Humic Acid ◽  
Calcium Ion ◽  
Colloidal Particles ◽  
Alginic Acid ◽  
Particle System ◽  
Feed Water ◽  
Permeate Flux ◽  
Widespread Application ◽  
Latex Beads

The utilization of membrane processes for drinking water treatment has become more popular. However, fouling by source water probably is the major factor prohibits its widespread application. In this research, the fouling phenomena of a microfiltration (MF) membrane were studied. The interactions among colloidal particles, calcium ion, and dissolved organics, such as salicylic acid, humic acid, and alginic acid, on MF fouling were focused. A lab-scale single hollow fiber MF membrane, made of polyvinylidenefluoride (PVDF), module was used. The results show that, for single organic compound, the extent of fouling caused by humic acid was higher that of alginic acid. For the latter, the permeate flux decrease at lower pH was more significant than those at higher pH. For low MW salicylic acid, both rejection and flux decrease were minor. It seems that solubility have strong correlation with fouling rate. The higher the solubility is, the lower the fouling rate. For sole colloidal particle system, latex beads with diameter close to the pore size of MF membrane showed severe fouling. Adding Ca can aggregate the latex beads, and alleviate fouling. However, calcium ion also found to increase fouling of alginic acid on membrane under neutral or alkali pH condition, probably via charge neutralization and/or bridging. In conclusion, MF fouling seems to be strongly related to the type of organics, size of colloidal particles, and the existence of divalent ions, in the feed water.

scholarly journals A bone replacement-type calcium phosphate cement that becomes more porous in vivo by incorporating a degradable polymer

2021 ◽  
Vol 32 (7) ◽  
Author(s):  
Akiyoshi Shimatani ◽  
Hiromitsu Toyoda ◽  
Kumi Orita ◽  
Yuta Ibara ◽  
Yoshiyuki Yokogawa ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Calcium Phosphate Cement ◽  
Alginic Acid ◽  
Setting Time ◽  
Zealand White Rabbit ◽  
Control Group ◽  
Degradable Polymer ◽  
Low Viscosity ◽  
Bone Replacement

AbstractThis study investigated whether mixing low viscosity alginic acid with calcium phosphate cement (CPC) causes interconnected porosity in the CPC and enhances bone replacement by improving the biological interactions. Furthermore, we hypothesized that low viscosity alginic acid would shorten the setting time of CPC and improve its strength. CPC samples were prepared with 0, 5, 10, and 20% low viscosity alginic acid. After immersion in acetate buffer, possible porosification in CPC was monitored in vitro using scanning electron microscopy (SEM), and the setting times and compressive strengths were measured. In vivo study was conducted by placing CPC in a hole created on the femur of New Zealand white rabbit. Microcomputed tomography and histological examination were performed 6 weeks after implantation. SEM images confirmed that alginic acid enhanced the porosity of CPC compared to the control, and the setting time and compressive strength also improved. When incorporating a maximum amount of alginic acid, the new bone mass was significantly higher than the control group (P = 0.0153). These biological responses are promising for the translation of these biomaterials and their commercialization for clinic applications.

Magnetic and dielectric characterization of alginic acid–Fe3O4 nanocomposite

Polyhedron ◽  
2011 ◽  
Vol 30 (2) ◽  
pp. 322-328 ◽  
Author(s):  
Z. Durmus ◽  
H. Sözeri ◽  
B. Unal ◽  
A. Baykal ◽  
R. Topkaya ◽  
...  
Keyword(s):  
Alginic Acid ◽  
Dielectric Characterization

Protein Immobilization in Metal–Organic Frameworks by Covalent Binding

2014 ◽  
Vol 67 (11) ◽  
pp. 1629 ◽  
Author(s):  
Xuan Wang ◽  
Trevor A. Makal ◽  
Hong-Cai Zhou
Keyword(s):  
Enzymatic Activity ◽  
Enzyme Immobilization ◽  
Working Conditions ◽  
Active Site ◽  
Covalent Binding ◽  
Metal Organic Frameworks ◽  
Protein Immobilization ◽  
Immobilization Of Enzymes ◽  
Metal Organic ◽  
Biological Catalysis

Metal–organic frameworks (MOFs), possessing a well defined system of pores, demonstrate extensive potential serving as a platform in biological catalysis. Successful immobilization of enzymes in a MOF system retains the enzymatic activity, renders the active site more accessible to the substrate, and promises recyclability for reuse, and solvent adaptability in a broad range of working conditions. This highlight describes enzyme immobilization on MOFs via covalent binding and its significance.

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