Constraints on the decay period of a free neutron from the characteristics of tritium beta decay

The reduced decay period of the triton, (ft _1/2)_T=(1129.6±3)s, and the free-neutron decay period, (t _1/2)_n=(616.7±;2.7±1.3) s, are determined from the experimental and theoretical values of the chemical shifts of atomic and molecular tritium.     

Über ein Gesetz,das verschiedene Eigenschaften ferromagnetischer Kristalle miteinander verknüpft

Zeitschrift für Physik A Hadrons and nuclei - Es werden die Formeln zur Berechnung 1. der Magnetostriktion, 2. der inneren Energiedichte, 3. der Fläche σ-σ0 zwischen den...     

Mössbauer study of radiation ordering in Ni3Mn alloy

An ordering process in disordered Ni₃Mn alloy. irradiated with fast neutrons at different doses and isothermally annealed. has been investigated using Mössbauer spectroscopy.     

Fiber lasers with a tunable green output

The tuning capabilities at the frequency doubling of the Yb-doped fiber laser using type-II second harmonic generation (SHG) in a KTP crystal in a walk-off compensated geometry are studied. Three configurations for different wavelengths are compared and the best one that provides a continuous tuning in the range 540–560 nm due to crystal tilting is chosen. The intracavity frequency-doubling scheme is applied to increase the efficiency.     

Enzymatic synthesis of multiple tritium-labeled nucleosides and nucleotides from nitrogen bases and ribose

A wide range of highly active nucleotides containing tritium labels in the heterocycle nucleus and ribose residue has been synthesized with the aid of an enzyme preparation fromE. coli, starting from tritium labeled nitrogen bases and ribose. In individual cases, the complex enzyme preparation was modified by the addition of nucleotide kinases or phosphatases.V. G. Khlopin Radium Institute and Biological Scientific Research Institute, A. A. Zhdanov Leningrad State University. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 258–264, March–April, 1988.     

Synthesis of uridine diphosphate [1-3H]glucose and uridine diphosphate [6-3H]glucose

Information is given on the synthesis of tritium-labeled UDPG by the successive transformation of D-[1-³H]glucose or D-[6-³H]glucose by the action of the enzymes hexokinase (EC 2.7.1.1), phosphoglucomutase (EC 2.7.5.1), and UDPG-pyrophosphorylase (EC 2.7.7.9) under conditions ensuring the retention of the tritium label. Methods of obtaining tritium-labelled substrates and intermediate products of their enzymatic transformations in the synthesis of [³H]UDPG are discussed.V. G. Khlopin Radium Institute, Leningrad. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 125–128, January–February, 1987.