VHF DIRECTION FINDER FOR LOCATING LIGHTNINGS AT CLOSE RANGES

1983-03-25A new VHF (74MHz) direction finding ('DF') system using Rocke-type Adcock antenna has been developed to locate nearby lightnings with a bearing error less than 2°. It is found from the DF results that the locations of lightnings are distributed within the region of a causative thundercloud, at ranges less than 120km.Related article: IWAI, Akira; NISHINO, Masanori; YAMASHITA, Hirokazu; Reply, Proceedings of the Research Institute of Atmospherics, Nagoya University. v.31, 1984, p.35-37, http://hdl.handle.net/2237/22133departmental bulletin pape

Close correlation of 1-beta-D-arabinofuranosylcytosine 5'-triphosphate, an intracellular active metabolite, to the therapeutic efficacy of N(4)-behenoyl-1-beta-D-arabinofuranosylcytosine therapy for acute myelogenous leukemia.

N(4)-Behenoyl-1-beta-D-arabinofuranosylcytosine (BHAC), a prodrug of 1-beta-D-arabinofuranosylcytosine, is used effectively for the treatment of leukemia in Japan. BHAC therapy may be more effective if it is delivered in conjunction with monitoring of 1-beta-D-arabinofuranosylcytosine 5'-triphosphate (ara-CTP), the intracellular active metabolite of ara-C derived from BHAC. However, previous monitoring methods for ara-CTP were insufficiently sensitive. Here, using our new sensitive method, we evaluated the ara-CTP pharmacokinetics in relation to the therapeutic response in 11 acute myelogenous leukemia patients who received a 2-h infusion of BHAC (70 mg / m(2)) in combination remission induction therapy. ara-CTP could be monitored at levels under 1 mM. BHAC maintained effective levels of plasma ara-C and intracellular ara-CTP for a longer time, even compared with historical values of high-dose ara-C. The area under the concentration-time curve of ara-CTP was significantly greater in the patients with complete remission than in the patients without response. This greater amount of ara-CTP was attributed to the higher ara-CTP concentrations achieved in the responding patients. There was no apparent difference of plasma ara-C pharmacokinetics between the two groups. Thus, for the first time, the ara-CTP pharmacokinetics was evaluated in relation to the therapeutic effect of BHAC, and the importance of ara-CTP was proven. Administration of optimal BHAC therapy may require monitoring of the ara-CTP pharmacokinetics in each individual patient.othe

The Effect of Surface Treatment of Ti-6Al-4V Alloy Specimens

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