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Immunohistochemical Studies of S-100 Protein During Postnatal Ontogenesis of the Brain of Two Strains of Rats
We have studied the dynamics of the appearance of cells reacting positively with anti-S-100 protein antiserum, during postnatal neurocytogenesis in the brain of rats of two strains differing in their susceptibility to sound stimuli. The postnatal time of appearance of cells reacting positively with anti-S-100 protein antiserum was somewhat later in rats susceptible to sound-induced seizures than in sound-resistant rats. These differences concerned mainly the cerebral cortex of 12-day-old rats. By day 21 of postnatal life these differences had disappeared. In subcortical structures of the brain, S-100 protein was first found on the 4th to the 5th day of life and the rate of appearance of cells containing this protein was similar in the two strains
Experimental study of charge exchange injection of protons into accelerator and storage rings
Electroless deposition and Electroplating of Metals
The present paper summarizes the main results of the research on the electroless and electrochemical metal deposition from aqueous solutions, which has been carried out in the Research Institute of Physical-Chemical problems of the Belarussian State University and at the Department of Inorganic Chemistry of the BSU for the last three decades. The paper covers the following problems: the main peculiarities of electroless and electrochemical deposition of copper, nickel, Ni-B,Ni-P, gold films 0.1-30 mkm and more in thickness, their phase composition, morphology and properties; the characteristic features of of hydrometallurgic allowing
(e.g. electroless and electrochemical deposition of a number of binary alloy coatings such as Cu-Ni, Cu-Cd, Cu-Sn, Cu-Zn, Ni-Sn, Ni-W, Ni-Mo), methods of their chemical and phase composition and microstructure regulation, together with correlation between these parameters and alloy properties; the methods for composite metal and alloy film plating from solutions with production of materials including metal oxides and thus possessing unusual and useful properties; the peculiarities of metal film plating onto dielectrics with production of continuous films and metal conductive patterns without the use of photoresists
Nootropic and anticonvulsant properties of the dry extract from Serratula Centauroides roots
The studies were carried out on white Wistar rats. The dry extract from Serratula centauroides L. was introduced to the animals at the doses of 50,100, and 150 mg/kg for 7 days prior to the testing. The nootropic effect of S. centauroides was estimated by using the test "conditioned passive avoidance reflex". In the groups of animals treated with the S. centauroides extract the number of animals with retained reflex was more than in the control group and the latent period of input into the dark bay of the device was longer than in the animals of the control group. The anticonvulsive activity of the S. centauroides extract was tested on the model of thiosemicarbazide-induced convulsions (30 mg/kg). It has been shown that the S. centauroides extract at the doses of 50-150 mg/kg prolongs the latent period of convulsion onset by 33% and increases the lifespan of the animals by 31-47% on the background of thiosemicarbazide-induced convulsions
In-vivo Studies of Ultrasound-activated Drug-loaded Porous Silicon Nanoparticles for Cancer Therapy Application
It is investigated the therapeutic efficacy of combined action of ultrasound and porous silicon nanoparticles loaded with anticancer drug doxorubicin by using an experimental cancer model of lung Lewis carcinoma in vivo. Time dependences of growth of the primary tumor with introduced nanoparticles and without them, as well as the life span of mice after exposure to therapeutic ultrasound with intensity of 1W/cm2 and frequency of 1 MHz were studied. The obtained results show the effectiveness of inhibiting the growth of primary tumor site, as well as slowing the process of metastasis, in the case of combined action of ultrasound and drug-loaded porous silicon nanoparticles that indicates the prospect of latter as sonosensitizers and nanocontainers for the delivery and controlled release of drugs in sonodynamic therapy of malignant tumors.
Keywords: silicon nanoparticles, nanocontainers, medical ultrasound, sonodynamic therapy, sonosensitizer
ANTIOXIDANT ACTIVITY OF THE DRY EXTRACT RHAPONTICUM UNIFLORUM (L.) DC
A study of the antioxidant activity of the in vitro dry extracts DER-1 and DER-2 derived from Rhaponticum uniflorum (L.) DC. It was established that the extracts have pronounced antiradical activity against DPPH-radical binding (IC50 (DER-2) = 2.0 mkg/ml). When studying the effect of the dry extracts a number of reactive oxygen species (O•-2, NO) revealed that they exhibit their ability to inactivate. With respect to Of-anion radical extracts show moderate and against NO - expressed antiradical activity (IC50 (DER-2) = 311.0 mkg/ml). We also revealed the presence of moderate Fe2+-chelating activity of the extracts studied. This effect is caused by apparently content of phenolic compounds, phenol carbonic acids, triterpene saponins and tannins
Development of ELISA test for the quality control of Pseudomonas aeruginosa recombinant vaccine based on the hybrid recombinant protein
A hybrid recombinant protein containing the amino acid sequences of the three most significant Pseudomonas aeruginosa antigens (membrane proteins OprF, OprI and toxoid aTox) was incorporated into a vaccine against Pseudomonas infection. Quality control of a hybrid recombinant protein and appropriate vaccine includes determination of authentity and completeness of adsorption upon aluminum hydroxide adjuvant. The aim of our study was to develop techniques of quality control for a vaccine based on the hybrid OprF-aToxOprI recombinant protein specific to P. aeruginosa. Hybridomas secreting specific monoclonal antibodies for OprF-aTox-OprI were derived from the fusion of myeloma cells and murine spleen cells immunized with recombinant proteins P. aeruginosa. To produce sufficient quantities of antibodies, the hybrid cells were in vivo cultured in BALB/c mice. Supernates and ascite liquids were chromatographically purified with immune sorbent. Conjugation of antibodies with horseradish peroxidase was carried out according to P.K.Nakane. The hybrid OprF-aTox-OprI recombinant protein was detected by the solid-phase ELISA, using a panel of monoclonal antibodies and conjugates of monoclonal antibodies with horseradish peroxidase. Monoclonal antibodies were specific for different OprF-aTox-OprI epitopes. Titration assays containing OprF-aTox-OprI protein at 78 ng/ml to 5000 ng/ml were used as quantitative standards for calibration curves.To identify the recombinant protein OprF-aTox-OprI, 55 variants of of MAb pairs were tested. Limits of quantitative detection served for selection of most sensitive and specific ELISA variants. The quantitative detection limit was calculated for all 11 ELISA variants. Two ELISA variants with the highest sensitivity were selected for quality control of the hybrid recombinant protein. The limits of quantitative detection were, respectively, 2.9 and 13.6 ng/ml (0.0058 and 0.027% of the estimated antigen content in the vaccine) for the first and second ELISA variants. The first variant included a pair of monoclonal antibodies specific for the OprF and OprI epitopes, the second variant represented aTox and OprI epitopes. Two variants of ELISA were developed to detect the hybrid recombinant OprF-aTox-OprI protein. The first variant allows to determine the protein amount and to evaluate completeness of its adsorption on aluminum hydroxide. To confirm authenticity of the protein, both methods must be used, since they can detect all three antigens (OprF, aTox and OprI) which are present in the fusion protein
Extremal projectors for contragredient Lie (super)symmetries (short review)
A brief review of the extremal projectors for contragredient Lie
(super)symmetries (finite-dimensional simple Lie algebras, basic classical Lie
superalgebras, infinite-dimensional affine Kac-Moody algebras and
superalgebras, as well as their quantum -analogs) is given. Some
bibliographic comments on the applications of extremal projectors are
presented.Comment: 21 pages, LaTeX; typos corrected, references adde
Cинтез 2-(1,2,4- триазол-3-ил)бензимидазольной библиотеки
A solution-phase synthesis for the preparation of substituted 2-(1,2,4-triazol-3- yl)benzimidazoles from triazole aldehydes and ortho-phenylenediamines has been developed for the purpose of producing diverse lead generation libraries.С использованием методов комби- наторной химии осуществлён син- тез 2-(1,2,4-триазол-3- ил)бензимидазольной библиотеки из триазолилальдегидов и фенилендиами- нов и проведено биохимическое тести- рование библиотеки на ингибирование киназной активности
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