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856 results on '"Rabinovitch M"'

151. Handedness: Proficiency versus Stated Preference

Author

Barnsley, Roger H. and Rabinovitch, M. Sam

Abstract

An investigation of performance factors of developed hand preference was undertaken. Measurements taken from both the preferred and nonpreferred hands of 50 males and 50 females yielded scores on 61 dependent variables from 32 tests. Factor analyses of the scores produced 9 interpretable factors of hand performance. Each factor was common to male and female and to preferred—nonpreferred performance. However, preferred hand performance was superior on almost all tasks. Results indicate that questionnaires of stated hand preference cannot adequately represent the range of handedness or degree of differential manual proficiency. It was suggested that preferred hand performance is characterized by “Automatization” of the skills involved in hand performance.

Published
1970
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152. Note on the Histochemical Localization of Glycogen and Pentosepolynucleotides in the Visual Cells of the Chick (Gallus gallus)

Author

Rabinovitch, M., Mota, Ivan, and Yoneda, S.

Abstract

Glycogen was studied in retinas of the chick (Gallus gallus), fixed in Gendre’s fluid and stained by the periodic acid/Schiff method. In agreement with some of the earlier data on the subject, obtained with less suitable methods, glycogen was found in the paraboloid of accessory cones and in the characteristically shaped paraboloid of the rods. Basiphilia, observable by means of the gallocyanin-chromalum stain and removable by ribonuclease or perchloric acid, was found in the inner segment of both chief and accessory cones, with the exception of the ellipsoid region.

Published
1954
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153. PHAGOCYTOSIS OF IMMUNE COMPLEXES BY MACROPHAGES

Author

Mantovani, B., Rabinovitch, M., and Nussenzweig, V.

Abstract

Sheep red cells (E) sensitized with IgG antibody (EA) or with antibody and complement (EAC) interact in vitro with mouse peritoneal macrophage monolayers. The role of IgG and of C3 in the attachment and ingestion of the erythrocytes was examined by means of quantitative technique utilizing 51Cr-labeled E. Controlled osmotic lysis permitted the separate measurement of the radioactivity associated with bound or with ingested E. IgG-125I was used to estimate the number of IgG molecules bound per E as a function of the IgG concentration. Control experiments showed that iodination did not influence the extent of binding of IgG to E and that the binding of IgG prepared from immune serum could be essentially ascribed to its anti-E antibody content. Only between 103 and 104 rabbit anti-E IgG molecules per erythrocyte were needed for detectable attachment and ingestion of EA (a maximum number of 6 x 105 IgG antibody molecules could be accomodated on one erythrocyte). Evidence was obtained that C3 is primarily involved in particle attachment, whereas only IgG is able to markedly promote the ingestion of particles attached to macrophages: (a) Addition of complement to the EA substantially increased the binding to the macrophages, whereas ingestion was increased to a smaller extent. Both binding and ingestion of EAC were markedly inhibited by papain fragments of IgG obtained from a rabbit antiserum to mouse C3. (b) Low doses (2 µg/ml) of papain fragments of IgG from a rabbit antiserum to mouse IgG markedly reduced the ingestion of EAC, whereas attachment of EAC to macrophages was inhibited to a much smaller degree. The possible relevance of these findings for the in vivo fate of particulate immune complexes as they interact with macrophages is discussed. It is suggested that in the primary immune response, when the complexes are predominantly in the form of EA (IgM) or EA (IgM) C3, they would tend to remain on the surface of the macrophages and thus be in a position to stimulate immunocompetent cells. In the secondary response, when EA (IgG) or EA (IgG) C3 predominate, the complexes would tend to be more rapidly interiorized and degraded by the mononuclear phagocytes,

Published
1972
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154. Conjugative Drug Metabolism in Liver Transplant Patients

Author

Venkataramanan, R., Kalp, K., Rabinovitch, M., Cuellar, R., Ptachcinski, R.J., Teperman, L., Makowka, L., Burckart, G.J., Van Thiel, D.H., and Starzl, T.E.

Subjects
Metabolic Clearance Rate, Reference Values, Humans, Article, Biotransformation, Acetaminophen, Half-Life, Liver Transplantation
Published
1989

155. Conjugative drug metabolism in liver transplant patients.

Author

Venkataramanan, R, Kalp, K, Rabinovitch, M, Cuellar, R, Ptachcinski, RJ, Teperman, L, Makowka, L, Burckart, GJ, Van Thiel, DH, Starzl, TE, Venkataramanan, R, Kalp, K, Rabinovitch, M, Cuellar, R, Ptachcinski, RJ, Teperman, L, Makowka, L, Burckart, GJ, Van Thiel, DH, and Starzl, TE

Published
1989

156. II. In vitro studies of antibacterial activity

Author

Marks, M. I., Rabinovitch, M., MacKenzie, R., and Brazeau, M.

Subjects
Cephalexin, Medical Practice: Treatment of Streptococcal Pharyngitis, Penicillin Resistance, Streptococcus, Pharyngitis, Microbial Sensitivity Tests, Penicillins, In Vitro Techniques, bacterial infections and mycoses, Anti-Bacterial Agents, Erythromycin, Lincomycin, stomatognathic system, Streptococcal Infections, otorhinolaryngologic diseases, polycyclic compounds, Humans, Pharynx
Abstract

One hundred and forty isolates of beta-hemolytic streptococcus cultured from patients with clinical pharyngitis were studied by disc diffusion for antibiotic sensitivity to lincomycin, erythromycin, cephalexin and penicillin and by agar dilution to cephalexin and penicillin. All isolates were sensitive to/= 0.1 mug./ml. penicillin and/= 1.56 mug./ml. cephalexin. The disc-diffusion test was reliable in predicting the sensitivities in vitro. One strain of group A betahemolytic streptococcus was resistant to erythromycin by disc diffusion. When compared to Lancefield grouping 18% of strains were incorrectly identified as group A by the bacitracin-disc test. Cephalexin was uniformly effective in vitro in inhibiting beta-hemolytic streptococci and the 30 mug. cephalexin disc was reliable in predicting these sensitivities.

Published
1973

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