851
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Recovery of murine leukemia virus from large volumes of freshly harvested culture fluids by using a single density gradient. Appl Microbiol 1975; 29:102-5. [PMID: 162965 PMCID: PMC186918 DOI: 10.1128/am.29.1.102-105.1975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Concentration and purification of murine leukemia virus for use as complement fixation antigens was accomplished by using a single density gradient in the model RK ultracentrifuge.
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852
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853
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854
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855
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Abstract
A DNA-containing bacteriophage for Thiobacillus novellus has been isolated from sewage and purified by ammonium sulfate precipitation, differential centrifugation, and cesium chloride equilibrium centrifugation. The buoyant density of this phage in CsCl is 1.51 g/cm(3). Electron microscopy studies have revealed a polyhedral head about 60 nm in diameter and a tail surrounded by a number of fine filaments. It has an adsorption rate constant of 1.1 x 10(-9) ml/min, a latent period of 45 min, and an average burst size of 150. The mole guanine and cytosine content in its DNA has been estimated to be 57 to 58%. Five structural proteins with molecular weights of 62,000, 42,500, 30,500, 17,750, and 13,500 have been detected by polyacrylamide gel electrophoresis techniques.
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856
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The effect of a chemically defined diet on the faecal flora and faecal steroid concentration. Gut 1973; 14:790-3. [PMID: 4202272 PMCID: PMC1412793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
Abstract
The consumption of a chemically defined diet altered both the faecal flora and faecal steroids. Enterobacteria increased while enterococci and other lactic acid bacteria decreased in number. No other obvious change occurred. However, the alteration in the degree of degradation of the faecal neutral steroids may reflect some alteration in the anaerobic flora. Total excretion of both acid and neutral steroids was also reduced. On cessation of the diet both faecal flora and faecal steroids reverted to levels before the diet.
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857
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Proceedings: The effect of chemically defined diets on the faecal flora and faecal steroids. Gut 1973; 14:831. [PMID: 4758707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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858
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DD-carboxypeptidase-transpeptidase and killing site of beta-lactam antibiotics in Streptomyces strains R39, R61, and K11. Antimicrob Agents Chemother 1973; 3:181-7. [PMID: 4790585 PMCID: PMC444384 DOI: 10.1128/aac.3.2.181] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Additional evidence is given that in Streptomyces strains R39, R61, and K11 the same enzyme performs dd-carboxypeptidase and transpeptidase activities and that this enzyme is the killing site of beta-lactam antibiotics. With strain R61, it was found that the exocellular enzyme has a sensitivity towards some antibiotics different from that of the membrane-bound enzyme. Under the growth conditions used in the present investigations, beta-lactamase activity was not involved in susceptibility to beta-lactam antibiotics.
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859
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Exocellular beta-lactamases of Streptomyces albus G and strains R39 and K11. Antimicrob Agents Chemother 1973; 3:289-98. [PMID: 4494518 PMCID: PMC444402 DOI: 10.1128/aac.3.2.289] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The beta-lactamases excreted by the highly benzylpenicillin-susceptible Streptomyces strain R39 and the highly benzylpenicillin-resistant Streptomyces albus G were isolated and purified. Neither beta-lactamase exhibited dd-carboxypeptidase activity. Both were anionic at pH 8.3, did not require metal ions, and were not sensitive to iodine, but were inhibited by Cu(2+) and readily inactivated by heat. p-Chloromercuribenzoate, iodoacetate, p-aminobenzoate, and substrates and inhibitors of dd-carboxypeptidase had no effect on beta-lactamase activity. The K(m) and V(max) values for beta-lactamase activity were studied with 6-aminopenicillanic acid and with various penicillins and cephalosporins. The beta-lactamase from the related strain K11 of Streptomyces, which is intermediate in its susceptibility to benzylpenicillin, was partially purified, and its activity was compared on the various substrates.
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860
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The classification of some non-sporing strict anaerobes. J Med Microbiol 1972; 5:Pxiv. [PMID: 4645982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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861
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862
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863
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Abstract
In the presence of N(alpha),N(epsilon)-diacetyl-L-Lys-D-Ala-D-Ala as donor, and either D-[(14)C]alanine, [(14)C]-glycine, or meso-[(3)H]diaminopimelic acid as acceptor, the DD carboxypeptidases from Streptomyces R61 and R39 catalyze a transpeptidation reaction with the release of terminal D-alanine from the donor and the formation of either N(alpha),N(epsilon)-diacetyl-L-Lys-D-Ala-D-[(14)C]Ala, N(alpha),N(epsilon)-diacetyl-L-Lys-D-Ala-[(14)C] Gly, or N(alpha),N(epsilon)-diacetyl-L-Lys-D-Ala-D-meso- [(3)H]diaminopimelic acid. The reaction appears to be a true transpeptidation, and is not simply a "reversal of hydrolysis". Transpeptidation is inhibited by pencillin at concentrations that inhibit hydrolysis (carboxypeptidase action) of the donor peptide. There are differences in the specificity profiles of the Streptomyces enzymes for acceptor molecules:only the R61 enzyme used [(14)C]Gly-Gly as acceptor; transfer of N(alpha),N(epsilon)-diacetyl-L-Lys-D-Ala to this acceptor resulted in the formation of N(alpha),N(epsilon)-diacetyl-Lys-D-Ala-[(14)C] Gly-Gly, with the synthesis of a (D-Ala-Gly) peptide bond in an endoposition.
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864
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Expiration dates of pharmacological and biological preparations. Pediatrics 1971; 48:668-9. [PMID: 5114755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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865
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Indicators of Drug Effectiveness. Science 1971; 173:870. [PMID: 17751303 DOI: 10.1126/science.173.4000.870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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866
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Decrease in the electrophoretic mobility of rabbit spermatozoa following intra-uterine incubation. JOURNAL OF REPRODUCTION AND FERTILITY 1971; 24:299-301. [PMID: 5102539 DOI: 10.1530/jrf.0.0240299] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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867
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A study of the dimensional changes occurring in the maxilla following closed face partial immediate denture treatment. Aust Dent J 1970; 15:463-8. [PMID: 4928455 DOI: 10.1111/j.1834-7819.1970.tb00948.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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868
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A study of the dimensional changes occurring in the maxilla following closed face immediate denture treatment. Aust Dent J 1969; 14:370-6. [PMID: 5264550 DOI: 10.1111/j.1834-7819.1969.tb02290.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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869
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Acute barbiturate intoxication. Concepts of management. JAMA 1969; 209:893-900. [PMID: 5306331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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870
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871
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872
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873
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Hyperkinetic syndrome in children. NURSING MIRROR AND MIDWIVES JOURNAL 1969; 128:21-4. [PMID: 5192994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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874
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875
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You hold the key. BEDSIDE NURSE 1968; 1:30. [PMID: 5183897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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876
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Nanosecond Pulse Radiolysis Studies of the Reaction of Ions in Cyclohexane Solutions. J Chem Phys 1968. [DOI: 10.1063/1.1668883] [Citation(s) in RCA: 89] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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877
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878
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A three-year study of the dimensional changes occurring in the maxilla following immediate denture treatment. Aust Dent J 1967; 12:152-9. [PMID: 5229240 DOI: 10.1111/j.1834-7819.1967.tb02191.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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879
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Expandable tower centralizes clinical facilities of medical center. HOSPITALS 1966; 40:46-9. [PMID: 5916821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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880
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881
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Review Body's Report: "Bitterly Disappointing". West J Med 1966. [DOI: 10.1136/bmj.1.5499.1363-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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882
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883
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884
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A study of the dimensional changes occurring in the maxilla after tooth extraction. Part IV. Interseptal alveolectomy and closed face immediate denture treatment. Aust Dent J 1964. [DOI: 10.1111/j.1834-7819.1964.tb02075.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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885
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A study of the dimensional changes occurring in the maxilla after tooth extraction. Part III. Open face immediate denture treatment. Aust Dent J 1964. [DOI: 10.1111/j.1834-7819.1964.tb02674.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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886
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A study of the dimensional changes occurring in the maxilla after tooth extraction. Part II: Closed face immediate denture treatment. Aust Dent J 1964. [DOI: 10.1111/j.1834-7819.1964.tb02041.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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887
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888
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A study of the dimensional changes occurring in the maxilla after tooth extraction. - Part I. Normal healing. Aust Dent J 1963. [DOI: 10.1111/j.1834-7819.1963.tb02649.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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889
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890
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891
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892
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893
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Solution of the equations for the green’s functions of a two dimensional relativistic field theory. ACTA ACUST UNITED AC 1961. [DOI: 10.1007/bf02731566] [Citation(s) in RCA: 258] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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894
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Intravenous procaine for obstetrical anesthesia.*. CURRENT RESEARCHES IN ANESTHESIA & ANALGESIA 1946; 25:133-46. [PMID: 20994189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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