摘要:

Alkaline phosphatase activity increased 10,000‐fold over basal levels in reindeer antler during the period of massive growth. The activity was highest in the zone of differentiating chondrogenic cells in the growing tip. The activity in the shaft was lower. PPiase activity was also highest in the antler tip, but compared to alkaline phosphatase, was more tightly membrane‐bound. Ca2+, Mg2+‐ATPase activity was not so markedly elevated in the tip as were the other activities. During the growth cycle, the highest activities of acid phosphatase and amino peptidases occurred later than the peak of alkaline phosphatase activity, and were found mainly in the dermis of the shaft.

ISSN:0022-1945    

DOI:10.1080/09291018609359893

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

By means of a microcomputer‐assisted, electronic recording system five physiological, circadian rhythms of the rabbit were monitored: locomotor activity, hard faeces excretion, food intake, urine excretion and water intake.

ISSN:0022-1945    

DOI:10.1080/09291018609359894

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

The paper deals with the description of time‐series by trigonometric functions and the possibility of obtaining reliable forecasts. The methods of analysis are discussed and analyses ofsomebiospheric series are carried out. The series which have been treated are monthly mean air temperature and annual yield in some fisheries. The conclusion is that there is great hope of acquiring trustworthy forecasts.

ISSN:0022-1945    

DOI:10.1080/09291018609359895

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

The range of entrainment of the locomotor activity rhythm of the cockroachLeucophaea maderaeis increased at both the upper and the lower limit by Li administration. This is not due to an increase of the Zeitgeber effect of light on the internal oscillators of the cockroach, as we tested by decreasing the intensity of the light of a 14:10 LD cycle. The threshold at which free run or relative coordination occurred was found to be 4.10‐11W/cm2(528 nm) and varied interindividually for 4 orders of magnitude. This threshold does not correlate with period length in DD. Adding Li leads only in 1 out of 15 cases to resynchronization, and this was due to a strong period lengthening in this particular animal rather than to an increased sensitivity of the oscillator to the Zeitgeber. Comparing populations, the mean threshold of synchronization under Li was the same as under water. If in the same individual the threshold was determined first under water, then under Li, synchronization was ameliorated. Age or after effects could be responsible for these results. Li seems to interact with coupling of oscillators.

ISSN:0022-1945    

DOI:10.1080/09291018609359896

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Juvenile sea bass were kept at three different salinities during two months. Ca2+, Mg2+, Na+and K+were determined in blood samples obtained at the beginning and at the end of the experimental period.

ISSN:0022-1945    

DOI:10.1080/09291018609359897

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

ISSN:0022-1945    

DOI:10.1080/09291018609359892

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor