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32 Newest Publications about the topic uv/vis spectroscopy
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Marine Drugs, Vol. 10, Pages 1459-1475: The Use of UV-Visible Reflectance Spectroscopy as an Objective Tool to Evaluate Pearl Quality
10-07-2012 | Agatonovic-Kustrin, Snezana ; Morton, David W., Marine Drugs, 2012
Assessing the quality of pearls involves the use of various tools and methods, which are mainly visual and often quite subjective. Pearls are normally classified by origin and are then graded by luster, nacre thickness, surface quality, size, color and shape. The aim of this study was to ...
Enhanced archaeal laccase production in recombinant Escherichia coli by modification of N-terminal propeptide and twin arginine translocation motifs
02-07-2012 | Sivakumar Uthandi, Laurence Prunetti, Ian Mitchelle S. De Vera, Gail E. Fanucci, Alexander Angerhofer, Julie A. Maup ..., Journal of Industrial Microbiology and Biotechnology, 2012
Laccases are multicopper oxidases that couple the oxidation of phenolic polymers to the reduction of molecular oxygen. While an archaeal laccase has only recently been described (LccA from the culture broth of Haloferax volcanii), this enzyme appears promising for biotechnology applications ...
Styrene-Spaced Copolymers Including Anthraquinone and β-O-4 Lignin Model Units: Synthesis, Characterization and Reactivity Under Alkaline Pulping Conditions
24-04-2012 | Jackson D. Megiatto, Jr; Emmanuel Cazeils; Frédérique Ham-Pichavant; Stéphane Grelier; Christian Gardrat; Alain Cast ..., Biomacromolecules, 2012
A series of random copoly(styrene)s has been synthesized via radical polymerization of functionalized anthraquinone (AQ) and β-O-4 lignin model monomers. The copolymers were designed to have a different number of styrene spacer groups between the AQ and β-O-4 lignin side chains aiming at ...
Bufferless lysis of erythrocytes for isolation of hemoglobin using modified cellulose acetate membranes
02-04-2012 | Siva Rama Krishna Vanjari, I. Deepthi, K. Sandeep, Bharadwaj Amrutur, Navakanta Bhat, Sampath Srinivasan, Biotechnology and Bioprocess Engineering, 2012
This paper presents a modified cellulose acetate membrane prepared using a dry casting technique that can be used to perform lysis of erythrocytes and isolation of hemoglobin. Isolation of hemoglobin is thus achieved without the use of lysis buffers. Cellulose acetate (CA) membranes are ...
Interaction Between 2′,4-Dihydroxychalcone and the N, F, E Conformers of Bovine Serum Albumin: Influence of Temperature and Ionic Strength
26-03-2012 | Rolando A. Curvale, Nora B. Debattista, Nora B. Pappano, The Protein Journal, 2012
UV–Vis spectroscopy was used to study the interaction between the 2′,4- dihydroxychalcone, flavonoid which is known to have anti-tumor activity in vitro, and others biological properties, and the N, F and E conformers of bovine serum albumin at different ionic strengths and temperatures. The ...
Preparation, characterization, and in vitro enzymatic degradation of chitosan‐gelatine hydrogel scaffolds as potential biomaterials
23-03-2012 | Gorgieva, Selestina; Kokol, Vanja, Journal of Biomedical Materials Research Part A, 2012
Abstract The crosslinking of chitosan (CHT) and gelatin (GEL) accomplished with N‐(3‐dimethylaminopropyl)‐N′‐ethylcarbodiimide hydrochloride (EDC) and N‐hydroxysuccinimide (NHS) was investigated and optimized in relation to hydrogels stability by varying the CHT/GEL mass ratio and the ...
Preparation, characterization, and in vitro enzymatic degradation of chitosan‐gelatine hydrogel scaffolds as potential biomaterials
23-03-2012 | Gorgieva, Selestina; Kokol, Vanja, Journal of Biomedical Materials Research Part A, 2012
Abstract The crosslinking of chitosan (CHT) and gelatin (GEL) accomplished with N‐(3‐dimethylaminopropyl)‐N′‐ethylcarbodiimide hydrochloride (EDC) and N‐hydroxysuccinimide (NHS) was investigated and optimized in relation to hydrogels stability by varying the CHT/GEL mass ratio and the ...
Encapsulation of drug microparticles with self‐assembled Fe3O4/alginate hybrid multilayers for targeted controlled release
25-01-2012 | Mu, Bin; Zhong, Wu; Dong, Yun; Du, Pengcheng; Liu, Peng, Journal of Biomedical Materials Research Part B: Applied Biomaterials, 2012
Abstract The magnetic‐targeted drug‐delivery system was developed with the Fe3O4 nanoparticles as the self‐assembling material to form the hybrid multilayer shells. Layer‐by‐Layer stepwise self‐assembly of the natural polyelectrolytes sodium alginate and the Fe3O4 nanoparticles was used to ...
Utilization of vinasse for the production of polyhydroxybutyrate by Haloarcula marismortui
19-01-2012 | Arnab Pramanik, Anindita Mitra, Meyyappan Arumugam, Anirban Bhattacharyya, Sohini Sadhukhan, Atrayee Ray, Saubhik Ha ..., Folia Microbiologica, 2012
Vinasse, a recalcitrant waste of the ethanol industry was employed for the production of polyhydroxyalkanoate (PHA) by the extremely halophilic archaeon, Haloarcula marismortui in shake flasks. The PHA was recovered by osmotic lysis of the cells and subsequent purification by sodium ...
Synthesis of biologically stable gold nanoparticles using imidazolium-based amino acid ionic liquids
30-12-2011 | Afsaneh Safavi, Sedigheh Zeinali, Mahdieh Yazdani, Amino Acids, 2011
A novel double-step reduction procedure for the synthesis of gold nanoparticles (AuNPs) using amino acid ionic liquids has been employed. 1-Dodecyl-3-methyl imidazolium tryptophan ([C12mim]Trp) and 1-ethyl-3-methyl imidazolium tryptophan ([C2mim]Trp) were used for this synthesis. The ...
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