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Digitale Medien

Experimental research on specific volumes of rubidium and potassium vapors (1987)

Voljak, L. D. ; Nikitin, A. N. ; Stepanov, V. G.

Springer

International journal of thermophysics 8 (1987), S. 239-246

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ISSN: 1572-9567

Schlagwort(e): dosing device ; piezometer ; potassium ; PVT measurements ; rubidium ; specific volume ; superheated vapor

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Results are reported of an experimental study of superheated rubidium vapor in the temperature range 1450–2000 K and pressure range 1.7–5.2 MPa and potassium in the range 1500–2100 K and 1.4–4.0 MPa. The experiments have been performed with an apparatus adaoted to implement a modified constant-volume piezometer technique, where the sensing element of a pressure transducer represented by a diaphragm is placed in a low-temperature zone. A dosing device is described which permits the performance of accurate measurements of the mass of the metal in the piezometer chamber. The present results are in good agreement with those reported by other investigators in the overlaping temperature and pressure ranges.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00515206

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Digitale Medien

Fertilization and cleavage of the human ovumin vitro (1976)

Nikitin, A. I. ; Nikolaichuk, M. P. ; Kitaev, É. M.

Springer

Bulletin of experimental biology and medicine 81 (1976), S. 451-453

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ISSN: 1573-8221

Schlagwort(e): human ovum ; fertilization and development in vitro

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Medizin

Notizen: Abstract A method of cultivating and fertilizing human ova obtained from ovaries removed at operation is described. A special method of sampling active spermatozoa was used for fertilization. Zygote formation was observed 24–36 h after fertilization of the ripe ova, an embryo of the two-cell stage was formed after 36–40 h, and an embryo at the four-cell stage after 48 h. The number of blastomeres reached 8 after 60–64 h, and after approximately 100–120 h the embryos reached the morula stage. The results provide wide scope for the study of the physiology and pathology of early human embryonic development.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00804947

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