EFFECTS OF MICROWAVE RADIATION ON ACTIVITY LEVEL OF RATS

SUZY EAKIN

doi:10.2466/pr0.11.5.192-192

Activity level and performance of weaner pigs exposed to 915 MHz microwave radiation

Canadian Journal of Animal Science ◽

10.4141/cjas96-028 ◽

1996 ◽

Vol 76 (2) ◽

pp. 183-188

Author(s):

K. D. Foote ◽

L. A. Bate ◽

A. W. Donald

Keyword(s):

Microwave Radiation ◽

Power Level ◽

Average Daily Gain ◽

Activity Level ◽

Adaptation Period ◽

Ir Radiation ◽

Microwave Exposure ◽

Resting Behaviour ◽

Resting Time ◽

Weaner Pigs

Microwave radiation (MWR) (915 MHz) is considered a possible source of supplementary heat for early-weaned pigs. To determine the behavioural effect of this form of heat on weaner pigs, four trials were carried out in which 64 pigs were exposed to microwave (MW) treatment at 11.4 (MW1) or 6.1 (MW2) mW cm−1 or infrared (IR) radiation at 500 W (IRR), each following a 4-d adaptation period. Pigs exposed to both MW treatments displayed greater (P < 0.05) daily percent resting time compared with IR exposed pigs [86.0 ± 1.6 vs. 82.3 ± 2.5 vs. 79.4 ± 3.7% (mean ± SD) for MW1, MW2 and IRR, respectively]. The increase in resting time was greatest after the first day of treatment and gradually returned to pretreatment levels over the course of the 3-wk experiment. The treatment effect over time was also significant (P < 0.05) between IR and both MW treatments and indicated similar patterns of resting time for the MW treatments. The pattern of resting behaviour for the IR group remained relatively unchanged throughout the experiment. Microwave exposure did not have an effect (P > 0.05) on average daily gain [0.32 ± 0.12 vs. 0.28 ± 0.07 vs. 0.30 ± 0.13 kg day−1 (mean ± SD) for IRR, MW1 and MW2, respectively]. The results indicate that 915 MHz MWR causes a power-level-dependent decrease in activity in weaner pigs. However, MW exposure does not significantly affect performance in weaner pigs. Key words: Weaner pigs, microwaves, behaviour, performance, supplementary heat

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Effects of Microwave Radiation on Activity Level of Rats

Psychological Reports ◽

10.2466/pr0.1962.11.1.192 ◽

1962 ◽

Vol 11 (1) ◽

pp. 192-192 ◽

Cited By ~ 4

Author(s):

Suzy Eakin ◽

William D. Thompson

Keyword(s):

Microwave Radiation ◽

Activity Level

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Specificity determinants of phosphoprotein phosphatases controlling kinetochore functions

Essays in Biochemistry ◽

10.1042/ebc20190065 ◽

2020 ◽

Vol 64 (2) ◽

pp. 325-336 ◽

Cited By ~ 1

Author(s):

Dimitriya H. Garvanska ◽

Jakob Nilsson

Keyword(s):

Spindle Assembly Checkpoint ◽

Activity Level ◽

Phosphorylation Sites ◽

Binding Affinities ◽

Mitotic Kinases ◽

Anaphase Onset ◽

Phosphoprotein Phosphatases ◽

Linear Motifs ◽

Temporal And Spatial ◽

Kinetochore Function

Abstract Kinetochores are instrumental for accurate chromosome segregation by binding to microtubules in order to move chromosomes and by delaying anaphase onset through the spindle assembly checkpoint (SAC). Dynamic phosphorylation of kinetochore components is key to control these activities and is tightly regulated by temporal and spatial recruitment of kinases and phosphoprotein phosphatases (PPPs). Here we focus on PP1, PP2A-B56 and PP2A-B55, three PPPs that are important regulators of mitosis. Despite the fact that these PPPs share a very similar active site, they target unique ser/thr phosphorylation sites to control kinetochore function. Specificity is in part achieved by PPPs binding to short linear motifs (SLiMs) that guide their substrate specificity. SLiMs bind to conserved pockets on PPPs and are degenerate in nature, giving rise to a range of binding affinities. These SLiMs control the assembly of numerous substrate specifying complexes and their position and binding strength allow PPPs to target specific phosphorylation sites. In addition, the activity of PPPs is regulated by mitotic kinases and inhibitors, either directly at the activity level or through affecting PPP–SLiM interactions. Here, we discuss recent progress in understanding the regulation of PPP specificity and activity and how this controls kinetochore biology.

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Pedometer Use Increases Physical Activity Level

Clinical Endocrinology News ◽

10.1016/s1558-0164(07)70641-7 ◽

2007 ◽

Vol 2 (12) ◽

pp. 18

Author(s):

MARY ANN MOON

Keyword(s):

Physical Activity ◽

Physical Activity Level ◽

Activity Level

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Self-Referent Thoughts in Exercise: The Self-Perception in Exercise Questionnaire

European Journal of Psychological Assessment ◽

10.1027/1015-5759.13.3.195 ◽

1997 ◽

Vol 13 (3) ◽

pp. 195-205 ◽

Cited By ~ 2

Author(s):

Marit Sorensen

Keyword(s):

Physical Activity ◽

Pilot Study ◽

Physical Activity Level ◽

Convergent Validity ◽

English Language ◽

Lifestyle Changes ◽

Activity Level ◽

Language Version ◽

Social Comfort ◽

And Gender

Adherence to lifestyle changes - beginning to exercise, for example - is assumed to be mediated by self-referent thoughts. This paper describes a pilot study and three studies conducted to develop and validate a questionnaire for adults to determine their self-perceptions related to health-oriented exercise. The pilot study identified items pertinent to the domains considered important in this context, and began the process of selecting items. Study 2 examined the factor structure, reduced the number of items, determined the internal consistency of the factors, and explored the discriminative validity of the questionnaire as to physical activity level and gender. Four factors with a total of 24 items were accepted, measuring mastery of exercise, body perception, social comfort/discomfort in the exercise setting, and perception of fitness. All subscales had acceptable internal consistencies. Preliminary validity was demonstrated by confirming hypothesized differences in scores as to gender, age, and physical activity level. The third study examined and demonstrated convergent validity with similar existing subscales. The fourth study examined an English-language version of the questionnaire, confirming the existence of the factors and providing preliminary psychometric evidence of the viability of the questionnaire.

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