Several model compounds containing thiol and/or amino groups (mercaptoethanol, glutathione, cysteine, ethanolamine, glycine) were studied with respect to their reactivity towards fluorescein isothiocyanate (followed spectrophotometrically at 504 and 412 nm), stability of product and long-wave absorption maximum of the fluorescein residue attached. Thiol groups reacted by far more readily than a...

The effect of three organic aromatic salts - Phenyltrimethylammonium (PhTMAB), benzyltrimethylammonium (BzTMAB) and benzyltrimethylammonium (BzTEAB) bromides - on the micellization of sodium dodecylsulfate has been investigated by conductometric method. The critical micelle concentration (CMC) values were found to decrease with increase in the concentration of the aromatic ammonium salts. Therm...

Electrophoretic methods can be used to identify meat of various animal species. The protein electrophoresis, especially the IEF of the sarcoplasmic proteins, is a wellestablished technique for species identification of raw fish and is used in the control of seafood authenticity. However, in the case of the analysis of heat-processed fish, the method is applicable only to those species which pos...

Liquid crystal (LC) phases typically show anisotropic alignment-dependent properties, such as viscosity and dielectric permittivity, so it stands to reason that LCs also have interfacial tensions. Measuring the tension γ of an LC with conventional methods, pendant drops, can be challenging, however, especially when we need know for different aligning conditions, is case seek Δγ, anisotropy. Her...

The basal apparatus, consisting of an array of interconnected basal bodies bearing bifurcating striated rootlets encompassing a nucleus, has been isolated from hypertonically deciliated columnar gill epithelial cells of the bay scallop Aequipecten irradians through gentle lysis with Triton X-100. The rootlets, 8-10 mum in length, were not easily preserved with conventional electron microscope f...

The aim of this study was to transform human hair keratin waste into a scaffold for soft tissue engineering heal wounds. extracted using the Shindai method. Keratin and polyvinyl alcohol (PVA) cross-linked with alginate dialdehyde converted by freeze-drying method gentamycin sulphate (GS) as model drug. subjected Fourier infrared spectra (FTIR), swelling index, porosity, water absorption, scann...

Drosophila alcohol dehydrogenase and its subunits were examined for their physical characteristics. The intact enzyme was shown to have a molecular weight of approximately 60,000. The smallest apparent subunit was obtained by dissociating the enzyme with sodium dodecylsulfate and the molecular weight obtained was 7,500. Evidence for three partially dissociated forms was obtained; the subunits o...

a novel magnetic mixed hemimicell solid phase extraction (mmhspe) technique for speciation analysis of soluble, ferrous and ferric iron in legumes sample by flame atomic absorption spectrometry analysis (faas) was developed. mmhspe system consisting of alumina-coated magnetite nanoparticles (fe3o4/al2o3nps) modified by sodium dodecylsulfate-1-(2-pyridylazo)-2-naphthol (sds-pan) have been succes...

Objective: To evaluate the medium-term results (4 years) of decelularized allografts during Ross Operation. Method: From January 2003 to February 2007, 68 patients underwent Ross Operation with decelularized allografts. Forty eight were male and the mean age was 30.3±11.2 years. Decelularization was done with deoxicolic acid (DOA) in 35 cases and with sodium dodecylsulfate (SDS) in 33. For comp...