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PMC OpenAccess
Subject Source PMC OpenAccess URL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5322771/view Article Title A Study of the Gas-Stabilized Arc as an Emission Source for the Measurement of Oscillator Strengths. Determination of Some Relative gf-Values for Fe I*Authors Marvin Margoshes; Bourdon F. ScribnerAbstract A study has been made of the application of the gas-stabilized arc source to the determination of oscillator strengths in atomic spectra. In this source, a solution of salts of one or more elements may be injected and the elements excited directly in an arc plasma with steady emission of spectral intensities. The source can be taken to be characterized by local thermal equilibrium, but with a large radial temperature gradient. An experiment indicates that when two elements are introduced into the arc in a solution, the relative concentrations of the elements in the discharge are the same as in the solution within the probable experimental error. This experiment indicates one way that the arc may be used for the determination of absolute oscillator strengths. New measurements are reported of the gf-values of 105 lines of Fe I between 2900 and 4150 Å, and the new values are compared with the results of earlier measurements.Is Part Of Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry 1963-12-01 , Vol.67A (6) , 561-568 Identifier ISSN: 2376-5704, 0022-4332 DOI 10.6028/jres.067A.053Publisher [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and TechnologyCategory License The Journal of Research of the National Bureau of Standards Section A is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright. -
PMC OpenAccess
Subject Source PMC OpenAccess URL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5322780/view Article Title Color Phenomena in Polymer Fracture*Authors Sanford B. Newman; Irvin WolockAbstract Thin layers derived from the matrix are produced in the fracture plane of some polymers prior to ultimate failure. A certain amount of the evidence would indicate that these layers consist of an oriented array of molecules. Fracture isolates these molecular segments in a thin film with physical properties differing from that of the matrix in which they originated. These films produce interference phenomena which in some cases are useful in elucidating structure and origin.Is Part Of Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry 1963-12-01 , Vol.67A (6) , 625-645 Identifier ISSN: 2376-5704, 0022-4332 DOI 10.6028/jres.067A.062Publisher [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and TechnologyCategory License The Journal of Research of the National Bureau of Standards Section A is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright. -
PMC OpenAccess
Subject 의과학, 인문사회과학 Source PMC OpenAccess URL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2071213/view Article Title The Experimental Production of Vascular Tumours in the RatAuthors J. S. HowellIs Part Of British Journal of Cancer 1963-12-01 , Vol.17 (4) , 663-671 Identifier ISSN: 1532-1827, 0007-0920 Category -
PMC OpenAccess
Subject 의과학, 인문사회과학 Source PMC OpenAccess URL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2071223/view Article Title The Distribution of Copper in the Tissues of the Rat: The Effects of Age and of Feeding pDimethylaminoazobenzene with and without copper AcetateAuthors G. Fare; D. L. WoodhouseIs Part Of British Journal of Cancer 1963-12-01 , Vol.17 (4) , 775-786 Identifier ISSN: 1532-1827, 0007-0920 Category -
PMC OpenAccess
Subject Source PMC OpenAccess URL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5322769/view Article Title Analysis of the Spectrum of Neutral Atomic Bromine (Br I)Authors Jack L. TechAbstract The spectrum of the neutral bromine atom, Br I, has been newly investigated by using electrodeless discharge tubes as light sources. The observations have led to a list of wavelengths and estimated intensities for 1253 spectral lines in the range 1067 to 24100 Å. The number of known energy levels has been increased to 123 even and 128 odd levels, as compared with the 27 even and 33 odd levels previously known. All predicted energy levels of the 4s24p4ns, up, nd, nf electron configurations from 0 to ~93250 K have been discovered. The observations in the vacuum ultraviolet establish that the positions of all the levels lying above those of the ground configuration as given in the compilation Atomic Energy Levels, Vol. II (1952) should be increased by 6.7 K. All but 26 faint lines of Br I have been classified. A total of 67 levels has been ascribed to the 4s2 4p* nf configurations. It is demonstrated that the nf configurations exhibit almost pure pair coupling. The very regular (3P2)nf[5]°11/2 series yields for the principal ionization energy of Br I the value 95284.8 K.Is Part Of Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry 1963-12-01 , Vol.67A (6) , 505-554 Identifier ISSN: 2376-5704, 0022-4332 DOI 10.6028/jres.067A.051Publisher [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and TechnologyCategory License The Journal of Research of the National Bureau of Standards Section A is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright. -
PMC OpenAccess
Subject 의과학, 인문사회과학 Source PMC OpenAccess URL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2071227/view Article Title The Use of Rat Bladder Pouches to Elucidate the Mode of Action of a Chemical which Induces Hyperplasia in the Bladder EpitheliumAuthors S. SantanaIs Part Of British Journal of Cancer 1963-12-01 , Vol.17 (4) , 715-718.1 Identifier ISSN: 1532-1827, 0007-0920 Category -
PMC OpenAccess
Subject Source PMC OpenAccess URL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5322773/view Article Title Buffer Solutions of Potassium Dihydrogen Phosphate and Sodium Succinate at 25 °CAuthors Maya Paabo; Roger G. Bates; Robert A. RobinsonAbstract A buffer mixture consisting of equal molalities (m) of potassium dihydrogen phosphate and sodium succinate is proposed as a useful reference point in the study of acid-base equilibria, bridging the present gap between pH 5.5 and pH 6.8. The p(aHγCl) at 25 °C has been determined by electromotive-force measurements for five buffer solutions in which m varied from 0.005 to 0.025. The conventional paH of each solution has been derived and found to be in good agreement with that calculated from existing data for the two equilibria concerned. The paH varies from 6.251 at m=0.005 to 6.109 at m= 0.025. The buffer mixture has been used successfully for the determination of the dissociation constants of 2-nitro-4-chlorophenol and 2,6-dichlorophenol.Is Part Of Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry 1963-12-01 , Vol.67A (6) , 573-576 Identifier ISSN: 2376-5704, 0022-4332 DOI 10.6028/jres.067A.055Publisher [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and TechnologyCategory License The Journal of Research of the National Bureau of Standards Section A is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright. -
PMC OpenAccess
Subject 의과학, 인문사회과학 Source PMC OpenAccess URL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2071229/view Article Title Hormone-Dependent Tumours of the KidneyAuthors H. J. G. Bloom; C. E. Dukes; B. C. V. MitchleyIs Part Of British Journal of Cancer 1963-12-01 , Vol.17 (4) , 611-645 Identifier ISSN: 1532-1827, 0007-0920 Category -
PMC OpenAccess
Subject 의과학, 인문사회과학 Source PMC OpenAccess URL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2071226/view Article Title Influence of Age on Susceptibility to Liver Carcinogenesis and Skin Initiating Action by Urethane in Swiss MiceAuthors L. Chieco-Bianchi; G. De Benedictis; G. Tridente; L. Fiore-DonatiIs Part Of British Journal of Cancer 1963-12-01 , Vol.17 (4) , 672-680 Identifier ISSN: 1532-1827, 0007-0920 Category -
PMC OpenAccess
Subject 의과학, 인문사회과학 Source PMC OpenAccess URL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2071214/view Article Title The Assay of the Effect of Chemical Agents on Tumour Invasion Using Chick EmbryosAuthors D. A. Stevens; G. C. Easty; E. J. AmbroseIs Part Of British Journal of Cancer 1963-12-01 , Vol.17 (4) , 719-726 Identifier ISSN: 1532-1827, 0007-0920 Category