• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.181-184
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• 2004

There are reports showing that electromagnetic fields (EMFs) emitted at non-thermal levels may be associated with biological alterations in target cells. In this study it is objected to assess the potential influences of EMFs produced by cellular phones on fetal heart rate. Non Stress Test (NST) is a widely used method of fetal monitoring and assessing fetal health and well-being. Sixty volunteers with uncomplicated term pregnancies were studied by a Spacelabs AM-67 Doppler ultrasound monitor. Fetal Heart Rate recordings were obtained while there were no Cellular Phone around for 10 minutes. Afterwards, all patients were exposed to EMFs for 10 minutes. NST was performed while they were holding the CP on stand-by mode and then on dialing mode, each for 5 minutes. The recordings were analyzed with respect to baseline heart rate, accelerations and decelerations. The Wilcoxon matched-pairs signed-ranks test was used to compare these variables. The results indicate that EMFs emitted by CP do not cause any demonstrable effects on baseline FHR, acceleration or deceleration.

• 대한예방한의학회지
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• 제11권2호
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• pp.133-139
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• 2007

In the study of Stress-Control by Qigong Program, the results were as follows : In modern society, many stress factors affect the human organism, altering and chipping away at our nervous, endocrine, locomotor, reproductive, digestive, respiratory, circulatory and immune systems. The beneficial effects of Qigong can help us to restore our equilibrium and enhance our quality of life. This study was performed to investigate the effect of Qigong on stress and psychological symptoms. Twenty-two subjects were trained Qigong Program a week for 8 weeks. The stress index of subjects and psychosomatic symptoms was compared before and after Qigong Program and was significantly decreased after Qigong training. It means that the stress index and psychosomatic symptoms were improved by Qigong training.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2001년도 춘계심포지움 및 학술발표회
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• pp.125-125
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• 2001

It has been hypothesized that environmental estrogens may play roles in the increasing incidence of breast and testicular cancers and another problems of the reproductive systems. Alkylphenols which are widely used as plastic additives and surfactants have been shown to induce estrogenic responses. The E-screen assay was developed to assess the estrogenedity of environmental chemicals using the profiferation effect of estrogens on their target cells as an end point. (omitted)

• BMB Reports
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• 제51권5호
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• pp.225-229
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• 2018

In humans, hormonal regulation is crucial for the preparation of uterine environment leading to either successful implantation or menstrual cycle. Estrogen is a pivotal female steroid hormone that regulates the uterine dynamics along with progesterone in the estrous and menstrual cycles in humans. Estrogen signals act via nuclear estrogen receptor or membrane-bound receptor. The membrane-bound estrogen receptor plays a crucial role in the rapid response of estrogen in the uterine epithelium. Recently, RASD1 has received attention as a novel signal transducer of estrogen in various systems including female reproductive organs. In this review, we discuss the regulation of estrogen and RASD1 signaling in the uterus and also provide insights into RAS as a novel signaling molecule in repeated implantation failure.

• Animal cells and systems
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• 제2권4호
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• pp.435-438
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• 1998

In the present study, we have examined the crossability of four species in the A. jaluense complex to provide additional information on their delimitation and levels of differentiation. Crosses between diploid A. chiisanense and the tetraploid species including A. jaluense s. str., A. triphyllum, and A. pseudoproliferum yielded no fruit- or seed-set, indicating that the former species is reproductively completely isolated from the latter three species. In interspecific crosses between the tetraploid species, combinations involving A. jaluense s. str. resulted in much reduced fruit- and seed-set, indicating that A. jaluense s. str. is more or less reproductively isolated from the other tetraploid species. However, crossing data revealed the absence of reproductive isolation between A. triphyllum and A. pseudoproliferum These results strongly support the relationships that have been previously suggested for the A. jaluense complex on the basis of morphology, chromosome number, and flavonoid chemistry.

• Animal cells and systems
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• 제2권4호
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• pp.451-454
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• 1998

Gulgastrura reticulosa, first described by Yosii (1966) as a monotypic new genus from a Korean limestone cave, was reviewed for its systematic position by c1adistic analysis of morphological characteristics, investigation of its intermaulting period and reproductive cycle as well as allozyme and 18S rDNA analysis. The great extent of divergence was strongly suggested by its combined lack of sensory organs (third antennal organ, postantennal organ, eyes, pseudocelli) with simultaneous development of an 'apical organ'at the tip of the antennae. The obvious divergence from any existing Collembola families was additionally supported by the extremely prolonged intermoulting period as well as by the low strap value it showed with Onychiuridae as obtained by 18S DNA sequence analysis. All these were considered Justifying the creation of a new family, Gulgastruridae, but still revealing more allied to Onychiuvidae rather than to Hypogastruridae.

• 대한임상전기생리학회지
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• 제2권3호
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• pp.1-12
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• 2004

Estrogens are critical to the functioning and maintenance of a diverse array of tissues and physiological systems in mammals. The actions of estrogen on such classical targets as the reproductive tract, gonads, mamary tissue, and hypothalamic/pituitary axis have been well characterized. A role in nonreproductive tissues, such as maintenance of bone mineral density and cardiovascular health in woman, as has been described. There were ne significant differences in the average of body weights, testis weights, among the experimental groups. The lumen of rate testis began to dilate from the day 8 and continued to the 59 post-treatment. The average diameter of dilate of rate testis in ICI 182,780 treated group increased 2.3-fold compared to the control group. Epithelical cell height in the rate testis of the treated mice decreased all the time periods, compared to the control.

• Asian-Australasian Journal of Animal Sciences
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• 제11권6호
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• pp.769-773
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• 1998

Genetic advances, changes in housing systems and new management strategies have made it necessary to thoroughly review conventional nutritional programs. The approach has changed from one of feeding to permit gradual depletion of fat and protein tissues to one of feeding to maintain long-term nutritional balance. Increasingly the sow is viewed as a dynamic system that can be described by a mathematical model. There is opportunity to improve the initial models through research to provide a better understanding of metabolism and key physiological events in the sow's reproductive life. Direct experimentation remains a very important tool for defining nutritional requirements. Recent data supports increases in amino acid recommendations during lactation. Voluntary feed intake remains an intractable problem during lactation.

• Animal cells and systems
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• 제12권2호
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• pp.93-96
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• 2008

In recent years, we frequently observed missmatched pairs between male Asian toads, Bufo gargarizans, and bullfrogs, Rana catesbeiana, at the toad breeding ponds, where scramble competition for mating occurred among the male toads. Thus, we performed two-choice experiments to investigate recognition ability of mates and species in male toads. The test males did not discriminate sexes, but the clasped stimulus males immediately produced release calls and stopped it while the clasped stimulus female did not. In addition, the test male toads did not discriminate reproductive state of females and even species. However, male toads chose larger individuals. The present results indicate that the main reason of missmatched amplexus by the male toads is due to 1) the lack of recognition cues of conspecifics, 2) the lack of communication tools like release calls, and 3) the larger size of bullfrogs than male toads themselves.

• Animal cells and systems
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• 제1권4호
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• pp.565-569
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• 1997

Vocal repertoires of the B1ack-tailed gull (Larus crassirostris) were studied at established reproductive colonies. The Black-tailed gull has eleven different vocal signals which can be grouped into three different call classes according to behavioral functions: contact call, alarm call (attention call), and aggressive call. The contact call or mew call is the most frequently used and functions as means of recognition among individuals, particularly between parents and youngs. Our results show that each call plays .an important role in particular social relationships in a high- density breeding colony.