dichloromethane/albumin

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Behavior of drug excited states within macromolecules: binding of colchicine and derivatives to albumin.

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The aqueous solutions of colchicine (COL) and analogues such as colchiceine (CEI), and N-deacetylcolchiceine (DCEI) have been studied by laser flash photolysis (LFP) with and without the presence of human serum albumin (HSA) to determine the possible interactions between the drugs and the albumin.

Stabilization of dichloromethane-induced protein denaturation during microencapsulation.

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This paper describes the denaturation of protein drugs by dichloromethane (DCM) during the primary emulsification step of the microencapsulation process using biodegradable polymer matrix for controlled-release application. It was found that interaction of proteins such as tetanus toxoid (TT),

Development and validation of a thermal desorber gas chromatography method for determination of residual solvents in drug loaded albumin.

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The conventional approach for residual solvent (RS) analysis is headspace-gas chromatography (HS-GC). This starts from a homogenous sample solution and is based on the equilibrium of the analyte between the sample and the gas phase. Unfortunately, aqueous solutions of albumin form irreversible

Serum-stable quantum dot-protein hybrid nanocapsules for optical bio-imaging.

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We introduce shell cross-linked protein/quantum dot (QD) hybrid nanocapsules as a serum-stable systemic delivery nanocarrier for tumor-targeted in vivo bio-imaging applications. Highly luminescent, heavy-metal-free Cu0.3InS2/ZnS (CIS/ZnS) core-shell QDs are synthesized and mixed with amine-reactive

Multifaceted approach for the fabrication of metallomicelles and metallic nanoparticles using solvophobic bisdodecylaminepalladium (II) chloride as precursor.

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A one-pot synthesis of solvophobic bisdodecylaminepalladium(II) chloride (complex 1) was performed. Complex 1 was characterized using X-ray crystallography and other techniques, namely, mass spectrometry, Fourier transform infrared, NMR, elemental analysis, etc. A multifaceted approach was taken to

The measurement of 18-hyroxy-11-deoxycorticosterone in human plasma by radioimmunoassay.

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A radioimmunoassay method for the measurement of plasma levels of 18-hydroxy-11 -deoxycorticosterone (18 -OH-DOC) has been developed. The antiserum against 18-OH-DOC was produced in rabbits immunized against 18-OH-DOC-3-oxime-bovine serum albumin. Plasma (1-2 ml) was extracted with dichloromethane

Protein release from poly(epsilon-caprolactone) microspheres prepared by melt encapsulation and solvent evaporation techniques: a comparative study.

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Poly(epsilon-caprolactone) (PCL) microspheres containing c. 3% bovine serum albumin (BSA) were prepared by melt encapsulation and solvent evaporation techniques. PCL, because of its low Tm, enabled the melt encapsulation of BSA at 75 degrees C thereby avoiding potentially toxic organic solvents such

Parameters influencing the antigen release from spray-dried poly(DL-lactide) microparticles.

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Microparticles were produced by spray-drying from a high molecular weight polylactide (PLA R207) for the development of long-lasting controlled release systems of vaccines, which may be designed to obviate the need for booster doses. The current investigation considered the effect of both

Preparation of polysaccharide glassy microparticles with stabilization of proteins.

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This study investigates a method of preparing hazard-resistant protein-loaded polysaccharide glassy microparticles using freezing-induced phase separation method without exposure to water/oil, water/air interface and cross-linking reagents. Model protein (such as bovine serum albumin, myoglobin and

Stabilization and immune response of HBsAg encapsulated within poly(lactic-co-glycolic acid) microspheres using HSA as a stabilizer.

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The aim of this study was to prepare poly(lactic-co-glycolic acid) (PLGA) microspheres containing hepatitis B virus surface antigen (HBsAg) using human serum albumin (HSA) as a stabilizer. Lyophilization and emulsification of HBsAg solution with dichloromethane caused a considerable loss of HBsAg

Radioimmunological determination of urinary tetrahydroaldosterone.

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A method is presented for radioimmunological determination of 3alpha, 5beta-tetrahydroaldosterone. It is based upon the reactivity of this steroid with an antiserum induced by the 3-carboxymethyloxime of 18, 21-aldosterone diacetate conjugated with bovine serum albumin. One hundred microliters of

The radioimmunological estimation of 13, 14-dihydro-15-ketoprostaglandin E2 in plasma and cervical mucus.

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Highly specific antibodies to 13,14-dihydro-15-ketoprostaglandin E2 (PGEM) were raised in rabbits. The animals were immunized with PGEM-bovine serum albumin (BSA)-conjugates. The metabolites were extracted with dichloromethane followed by column chromatography. The final antisera dilution was

Formulation and characterization of immunoreactive tetanus toxoid biodegradable polymer particles.

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Poly lactide-co-glycolide and polylactide polymer particles entrapping immunoreactive tetanus toxoid (TT) were prepared with a view to developing a single shot controlled release vaccine formulation. Denaturation of TT by dichloromethane (DCM) during primary emulsification stage of particle

[Pharmacokinetics of digitoxin in chronic renal failure (author's transl)].

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Digitoxin concentration, measured by radio-immunoassay, was significantly lower in 51 patients in chronic renal failure (23.2 +/- 7.8 mug/l) than in 29 patients in heart failure (26.5 +/- 7.3 mug/l), although both groups were on the same maintenance dose of 0.1 mg daily. Despite a normal serum

Radioimmunoassay for 13, 14-dihydro-15-ketoprostaglandin F2 alpha and its application in normo- and anovulatory women.

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Highly specific antibodies to 13, 14-dihydro-15-ketoprostaglandin F2 alpha (PGFM) were raised in rabbits. The animals were immunized with PGFM-bovine serum albumin (BSA)-conjugates. Prior to the incubation procedure PGFM was extracted by a rapid method with dichloromethane followed by column

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