geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Analysis of the effects of some factors influencing the rabbit's food intake pattern i. modification of the circadian pattern by the retinal maintained discharge ii. entrainment of the rhythm by 24 h ld alternations iii. masking by low frequency noise


, : Analysis of the effects of some factors influencing the rabbit's food intake pattern i. modification of the circadian pattern by the retinal maintained discharge ii. entrainment of the rhythm by 24 h ld alternations iii. masking by low frequency noise. Journal of Interdisciplinary Cycle Research 19(4): 257-274

Continuous records of the number of food approaches during ad libitum-feeding were obtained from 9 rabbits that were exposed, for periods of 3-7 months, to continuous illumination (200-250 Lux), total darkness, and light-dark regimes of LD 1:23 and LD 12:12. Thereupon, both optic nerves were sectioned and recording was continued for 18 months, with and without the application of periodical low-frequency noise or regular maintenance schedules. It appears that the circadian pattern of food intake is governed by two loosely coupled circadian oscillators with widely different properties. They are differentially synchronized by the lights on- and lights off transients of LD regimes, that seem to be the only 'entraining' factors. Other environmental factors, if influencing food intake at all, have a 'masking' effect only, such as a suppression of food uptake during noise. Food intake per 24 h was nearly the same in all circumstances. One of the 2 oscillators, the 'Illumination Intensive' one, has highly peculiar properties in that both its effect on the food intake pattern and its free-running period are practically constant, and in that the latter usually deviates less than 1 min from 24 h.

US$29.90


Other references

Martin, D.F.; McGregor, J.C.; Lambert, M.E.; Tweedle, D.E., 1989: Pernasal catheter perfusion without dissolution agents following endoscopic sphincterotomy for common duct stones. British Journal of Surgery 76(4): 410-411

Xiong, J.; He, M.; Hansen, K.; Jackson, C.L.; Breese, V.; Quddus, M.Ruhul.; Sung, C.James.; Lomme, M.M.; Lawrence, W.Dwayne., 2016: The clinical significance of K-ras mutation in endometrial "surface epithelial changes" and their associated endometrial adenocarcinoma. The entity of 'surface epithelial changes' (SECs) was first described in 1995 [1]. Morphologically, SECs usually arise from malignant glands at the superficial aspect of well differentiated (WD) endometrioid carcinomas (ECs) and impart t...

Park, Y-Soo.; Hur, E-Mi.; Choi, B-Hwa.; Kwak, E.; Jun, D-Jae.; Park, S-Jin.; Kim, K-Tai., 2006: Involvement of protein kinase C-epsilon in activity-dependent potentiation of large dense-core vesicle exocytosis in chromaffin cells. Neurotransmitter release is modulated in an activity-dependent manner. We showed previously that repetitive stimulation of nicotinic acetylcholine receptor (nAChR) induced activity-dependent potentiation (ADP) of large dense-core vesicle (LDCV) e...

Huber C., 1987: Recombinant ifn alpha 2 rifn alpha 2 for treatment of chronic myelogenous leukemia in benign and accelerated phase. Blut: 387

Rohen, H., 1951: Structure of the iris. Anatomischer Anzeiger 97(Suppl.): 178-181

Desikan, P.; Chauhan, D.S.; Sharma, P.; Panwalkar, N.; Gautam, S.; Katoch, V.M., 2013: A pilot study to determine genetic polymorphism in Mycobacterium tuberculosis isolates in Central India. This study was carried out to identify predominant spoligotypes responsible for transmission and prevalence of tuberculosis in central India since there is no data available about the genetic biodiversity of Mycobacterium tuberculosis isolates fro...

Frazier, T.G.; Noone, R.B., 1985: An objective analysis of immediate simultaneous reconstruction in the treatment of primary carcinoma of the breast. In January 1977, the authors developed a protocol to test the advisability and feasibility of immediate simultaneous reconstruction in the treatment of primary carcinoma of the breast. Initial concerns included the morbidity of the procedure, the...

Detilleux, J.D.; Freeman, A.E.; Kehrli, M.E.J., 1991: Immune response of Holstein cattle around parturition. Genetic improvement of general disease resistance in cattle may be based on selection of suitable immunological criteria. Neutrophil (cytochrome C reduction, native chemiluminescence, direct and random migration, ingestion, antibody-dependent and...

Goodlad, J., 1984: All nurses should have eye check-up before working with lasers. Nursing Standard 362): 6-6

Defago de Pecchioni, MT., 1988: Crianza de Diabrotica speciosa (Coleoptera, Chrysomelidae) bajo condiciones de laboratorio. Revista Peruana de Entomologia, 31: 86-90