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Volume 7 (1972)
- Issue 4 Pages 181-
- Issue 3 Pages 99-
- Issue 2 Pages 43-
- Issue 1 Pages 1-
Volume 7, Issue 1
Displaying 1-6 of 6 articles from this issue
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Sumio NAGASAWA, Isamu NAKAYAMA1972 Volume 7 Issue 1 Pages 1-8
Published: March 25, 1972
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSThe probit estimation method pf parameters of tolerance distribution proposed by WADLEY (1949) and generalized later by FINNEY (1949) would be widely applicable for analysing the experimental data of quantal characteristic response test in which the count of the initial number of test organisms is missing. Their description of statistical analysis, however, referred to the case where the number in the standard size of sample used in the tests was a sample from a Poisson-distributed population of mean N. It is not unusual that susceptibilities to a chemical of two samples from Possion-distributed populations of means N1 and N2 have to be compared each other. For calculating the relative susceptibilities of testing organisms coming from different sources as mentioned above, some formulae discribed by WADLEY and FINNEY were modified in this paper. As a numerical example, the procedure was illustrated by the experimental data comparing the rates of emergence of offsprings of Drosophila melanogaster MEIGEN given hampa with saccharose and these given hempa with dried milk. The result of statistical analysis showed that Drosophila flies give nthe former poison bait was 1.545 times as susceptible as that given the latter poison bait and the fiducial limits of this estimate were 1.109 and 2.152.View full abstractDownload PDF (605K) -
Hiroshi WATANABE, Yoshinori TANADA1972 Volume 7 Issue 1 Pages 9-16
Published: March 25, 1972
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSEven though the infection by the typical strain of a nuclear-polyhedrosis virus is much more acute than that of the hypertrophic strain, the cytopathology, especially of the trachea, is similar. There is a difference, however, in the stratification of the hypodermis when infected by the typical strain. The sequence of autoradiographic changes, as demonstrated with 3H-thymidine, 3H-uridine, and 3H-tyrosine, for DNA, RNA and protein syntheses is the same for the infections caused by the two virus strains, and it resembles that of other nuclear polyhedroses.View full abstractDownload PDF (2954K) -
Tyuzi KUSANO, Yasuo KASAHARA, Yojiro KAWAMURA1972 Volume 7 Issue 1 Pages 17-26
Published: March 25, 1972
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSIn the present study, electrical responses of the chorda tympani nerve and behavior responses to thiourea derivatives in rats were determined. Also the relationships between these results and toxicity or water solubility of these compounds have been discussed.These were no close relationships amoung the thresholds for discrimination, taste effectiveness for the chorda tympani nerve, oral toxicity and water solubility of thiourea derivatives.The unpalatable taste effect of thiourea derivatives to rats was markadly lower than that of QU.Marked individual differences in the thresholds for discrimination were observed in PTU, TSZ and THU, but less in PU, UR and QU.THU, TSZ and PTU, having the functional group -C__1=S, had either lower thresholds for discrimination or more unpalatable taste effect than UR and PU which lacked the above mentioned functional group. However, such tendency of thiourea derivatives was not found in the results of nerve response. The present results indicate that general oral sensory information other than taste information will be more relevant in the determination of thresholds for discrimination of rats to thiourea derivatives. In PTU, TSZ and ANTU, a relationship between taste effectiveness and practical efficiency for rat-control has been discussed.View full abstractDownload PDF (693K) -
Michihiko MATSUDA, Jun-ichi FUKAMI1972 Volume 7 Issue 1 Pages 27-36
Published: March 25, 1972
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSRate of oxidation by American cockroach muscle mitochondria increased and respiratory control was high level when the mitochondria were isolated with a medium containing Trisbuffer, bovine albumin and cysteine. Rates of pyruvate, α-glycerophosphate and succinate oxidation were stimulated and a value of respiratory control was higher than 1 only in the case of pyruvate.Various inhibitors and uncouplers inhibited mitochondrial respriation of roach muscle prepared with medium containing sucrose (250 μM), EDTA (1 mM), Tris-buffer (10 mM), bovine albumin (0.1%) and cysteine (0.05%). Nitrophenols, chlorophenols and a cyanophenol showed uncoupling functions. The difference on the degree of inhibition to rat liver mitochondria between p-nitrophenol and 3-methyl-4-nitrophenol, metablites of methyl parathion and Sumithion respectively, was small. Lindane did not uncouple the mitochondrial respriation.View full abstractDownload PDF (805K) -
Naokuni TAKEDA1972 Volume 7 Issue 1 Pages 37-39
Published: March 25, 1972
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSDownload PDF (611K) -
Jun MITSUHASHI1972 Volume 7 Issue 1 Pages 39-41
Published: March 25, 1972
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSDownload PDF (697K)
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