• 한국균학회지
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• 제36권2호
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• pp.189-195
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• 2008

Aspergillus nidulans는 빛이 없는 조건에서는 유성분화가 주로 일어나고 빛이 있는 조건에서는 유성분화가 억제되고 대신 무성분화가 유도된다. 빛에 의해서 유성분화가 억제되는 것은 빛에 반응하여 유성 또는 무성분화를 조절하는 유전자가 있다는 것을 시사한다. 따라서 빛에 의해서 조절되는 유전자를 연구하기 위하여 광 조건하에서 유성분화를 하는 silA98 돌연변이를 분리하였으며, 이를 보완하는 유전자를 분리 및 분석하고자 A. nidulans의 AMA-NotI genomic library로부터 silA98 돌연변이를 상보하는 유전자 silA를 분리하였다. silA 유전자의 예상 ORF는 2,388 bp의 염기로 구성되어지고 795개의 아미노산을 암호화하고 있었다. 이 유전자는 Saccharomyces cerevisiae의 ARO80 유전자와 상동성을 보이며 SilA 단백질의 N 말단에는 약 51.9%의 상동성을 가지는 ${Zn_2}{Cys_6}$ motif를 지니고 있었다. silA 유전자 결손돌연변이주는 광 존재 하에서뿐만 아니라 고농도의 sorbitol에서도 유성분화가 유도되었다. 이는 silA 유전자가 빛과 고삼투 조건에서 유성분화를 억제하는 조절과정에 관여하고 있음을 의미한다. silA 유전자를 niiA promoter로 과다 발현시켰을 때의 형질은 야생형과 큰 차이를 보이지 않았다.

• 농업생명과학연구
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• 제50권4호
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• pp.113-125
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• 2016

본 시험은 성 성숙기의 한우 암송아지 18두(14개월령, 평균체중 251kg)를 이용하여 저 수준의 농후사료 급여에 따른 성장과 번식능력에 미치는 영향을 규명하기 위하여 실시하였다. 공시축은 시판 한우 번식우용 배합사료를 체중의 0.8%(T1) 및 1.2%(T2)씩 총 30개월(사양시험 20개월, 번식능력시험 10개월) 동안 섭취하였으며, 처리구당 9두를 2우리에 완전임의 배치를 하였다. 본 시험의 사양시험 결과를 한국가축사양표준의 영양소 요구량과 비교해 볼 때, T1구에서 성장이 제대로 되지 못한 이유는 에너지 보다는 단백질 섭취부족 때문인 것으로 나타났다. 공시축의 체형변화에서 저 영양수준으로 인하여 영향을 가장 많이 받는 부위는 흉폭과 체장이었으며 특히, 흉폭은 시험시작시보다도 종료시 측정치가 오히려 3.7% 작았다. 난소의 크기는 T1구가 T2구의 약 63%수준밖에 되지 않았으며, 수태율(33.3% : 77.8%)과 송아지의 생시체중(22.5kg : 29.5kg)도 T1구에서 심각하게 저하되었다. 따라서 한우번식우 사양에 있어서 성성숙기 이후에도 에너지보다는 단백질 공급수준에 의해 사양성적 및 번식능력에 많은 영향을 끼치는 것으로 나타났다.

• 대한의생명과학회지
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• 제19권1호
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• pp.17-24
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• 2013

Animals show a sexual dimorphism in metabolic responses. We investigated to verify whether the peroxisome proliferator-activated receptor ${\alpha}$ ($PPAR{\alpha}$) agonist fenofibrate regulates obesity and skeletal muscle lipid metabolism with sexual dimorphism and to determine the changes in skeletal muscle expression of $PPAR{\alpha}$ target genes. After both sexes of C57BL/6J mice received a high fat diet with or without fenofibrate for 7 weeks, we examined the effects of fenofibrate on not only body weight, adipose tissue mass, and skeletal muscle lipid accumulation, but also the mRNA expression of $PPAR{\alpha}$-related genes in skeletal muscle. Male mice given a fenofibrate-supplemented high fat diet showed decreased body weight gain and adipose tissue mass compared with mice fed a high fat diet alone, whereas fenofibrate did not reduce them in high fat diet-fed female mice. Lipid accumulation in skeletal muscle was inhibited by fenofibrate in male mice, but not in female mice. Gene expression analysis revealed that fenofibrate increased the mRNA levels of $PPAR{\alpha}$ target enzymes only in male mice. Therefore, our results suggest that sex-dependence differences in obesity and intramuscular lipid levels under fenofibrate treatment could be due in part to the differences in skeletal muscle $PPAR{\alpha}$ activation between male and female mice.

• 대한불안의학회지
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• 제12권1호
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• pp.21-27
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• 2016

Objective : The aim of this study was to investigate the relationship between subjective sleep problems and various types of traumatic events of patients with depressive disorder. Methods : A total of 411 patients diagnosed with depressive disorders were recruited in this study. The participants filled out Life Time Events Checklist (LEC), Pittsburgh Sleep Quality Index (PSQI), Beck Depression Inventory (BDI), and State-Trait Anxiety Inventory (STAI). We used the independent t-test and analysis of covariance to compare each component of PSQI between depressive patients with and without traumatic experiences. Results : The groups of patients who experienced a serious accident at work, home or during recreational activity, sexual assault, other unwanted or uncomfortable sexual experience, life-threatening illness or injury, and sudden, unexpected death of a near and dear one showed lower scores in a few components of PSQI. Sleep disturbance was a common problem in all five groups. Lower subjective sleep quality and longer sleep latency was observed in three groups. There were no differences in the other components of PSQI among groups. Conclusion : This study showed that various types of traumatic events may have different effects on subjective sleep quality as a consequence of the traumatic event which they had experienced.

• 대한간호학회지
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• 제33권4호
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• pp.457-463
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• 2003

Purpose. This cross-sectional survey was conducted to describe the sexuality of Korean women after menopause using a national sample, and to examine relationships between the sexuality and demographic, body mass index, and life style factors including smoking, alcohol use, and physical activity. Method. From Dec. 20, 1998 to April 30, 1999, 2196 naturally postmenopausal women aged between 41 and 65 years were recruited by a disproportional stratified random sampling method from 7 metropolitans and 6 provinces in Korea. The questionnaire was used to obtain information on the demographic characteristics, life style factors, body mass index, and sexual activities. Result. The findings show that the frequency of intercourse after menopause decreased among most of postmenopausal Korean women (64.5%). The frequency of women reported their sexual activity as satisfactory was higher among women doing physical activity, not smoking, with higher educational status, with middle socioeconomic status, without sleep disturbance, with lower body mass index, and with good subjective health status. Conclusion. Further studies need to be designed as the longitudinal studies with larger random samples and better measures of sexuality.

• 한국환경생물학회:학술대회논문집
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• 한국환경생물학회 2003년도 학술대회
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• pp.116-120
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• 2003

The genus Paracalanus Boeck, 1864 dominate zooplankton communities in waters off Korean peninsula. Zooplankton samples collected from four waters (Uljin, Hadong, Youngkwang, Cheju) were sorted for specimens belonging to the genus Paracalanus. Paracalanus sp. regarded to p. paMus or p. indicus were examined. Body of male has cephalosome dorsal hump (CDH). Urosomites have four segments in female and five segments in male. In male, antennule is symmetry and fused without geniculation. The male antennule carries more aesthetascs than those in female antennule. Female P1-P4 is similar to those of male in seta and spine formular. Spinules on surface of legs are different each other. The female P5 is symmetrical, and composed of 2 segment. In male, it is aymmetrical and left leg composed of 5 segments, right leg 2-segmented. Male found patch of fine spinule on terminal inner surface of outer process on fifth segment. Sexual dimorphism appear saliently in mouth appendages. Mandible lacks of gnathobase; maxillule is apparently reduced; maxilla degrades it i]l female and remains vestiges between maxillule and maxilliped; maxilliped terminal part indistinctly articulated and carrying behind three strong plumose setae. With the absence of gnathobase in male, we conclude that male Paracalanus sp. does not feed.

• 한국동물학회:학술대회논문집
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• 한국동물학회 2000년도 한국생물과학협회 학술발표대회
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• pp.203.2-204
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• 2000

No Abstract, See Full Text

• 한국생명과학회:학술대회논문집
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• 한국생명과학회 2007년도 제48회 학술심포지움 및 추계국제학술대회
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• pp.52.1-52.1
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• 2007

See Full Text

• 한국학교ㆍ지역보건교육학회지
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• 제6권
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• pp.17-34
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• 2005

The purpose of this study was to examine the sex-consciousness and sexual values of school children by geographic region. It's specifically attempted to make a comparative analysis of sex-consciousness and sexual values between urban and rural elementary schoolers to help provide efficient sex education for them to build the right sexual values. The subjects in this study were 400 elementary schoolers in their sixth year of elementary schools located in Danyang-gun and Chungju city, north Chungcheong province. After a survey was conducted, answer sheets from 387 students that were analyzable were analyzed. For data handling, SPSS program was employed, and t-test was utilized to see if there's any differences between the urban and rural elementary school youngsters in sex consciousness and sexual values. And $x^2$ test was used to make a comparative analysis of their view of sex education. The findings of the study were as follows : First, regarding sex-consciousness, they had general knowledge on sex. Especially, they were highly aware of sexual violence and the generation of baby, but many of them didn't know about where and how egg cells were produced. This indicated that systematic education should be offered in various ways. Concerning geographic gap, there was a significant difference in sexual knowledge between the urban and rural students. As to sexual attitude, they took a relatively positive attitude toward display of affection or sex-related talk on TV or in movies, as they viewed it as natural. This finding implied that the elementary schoolers were recipient toward sex and took an active attitude toward sexual expressions. Concerning geographic gap, there was no difference between the rural and urban students. As for sexual practices, the largest group of the students had a liking for the opposite sex, which showed that their needs for sex were unveiled in the course of having some trouble due to the other sex rather than through firsthand experiences or activities. As to geographic gap, there was a significant difference between the urban and rural students in that regard. Besides, the urban students put their sex-consciousness in practice more often than the rural students did. After they are educated to build the right sexual values, systematic sex-education programs should also be offered for them to be exposed to sustained sex education and to team how to apply their sex-consciousness to real life. Second, as for sexual values, the school children had relatively positive and equalitarian sexual values. Regarding geographic gap, there were significant gaps between the two groups' view of the opposite sex, sexual roles and chastity. Concerning view of the opposite sex, they attached more importance to the inner aspects of the opposite sex than his or her look, and they wanted to date in a natural manner. Regarding sexual roles, they were relatively well cognizant of gender equity and the importance of male and female roles. As to view of chastity, they looked upon sex as natural, not as what's ugly or ashamed of. Third, concerning their outlook on sex education, approximately more than half the students felt the needs for sex education, and there was a significant difference between the urban and rural students. They wanted to receive education about the prevention of sexual violence and physical changes during puberty the most, and there was a significant gap between the urban and rural students in this aspect. As to the time for sex education, they thought that students should start to be exposed to sex education in their fifth or sixth year. This finding signified that fifth or sixth graders who were in the beginning of puberty started to have a lot of interest in their own physical changes. Therefore, sex education would produce better effects when it's provided to fifth or sixth graders. Nearly half them preferred single-gender class when they received sex education, and there's no gap between the urban and rural students in that regard.

• 한국발생생물학회지:발생과생식
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• 제17권1호
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• pp.37-43
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• 2013

Cynomorium songaricum (CS) has been used in traditional Korean medicine in treating male impotence and sexual dysfunction. We investigated the effects of aqueous CS extract on the reproductive activity of golden hamsters whose spermatogenetic capacity is active in summer and inactive in winter. The animals were divided into 5 groups: long photoperiod (LP) control, short photoperiod (SP) control, and SP animals treated with low, middle, or high concentrations of CS. The animals were orally ingested with low (0.5 g/kg), middle (1.0 g/kg), or high (2.5 g/kg) concentrations of the aqueous extracts for 8 weeks on the daily basis. The control animals received the vehicle. As results, the LP control animals showed active testicular function but SP control animals displayed remarkably reduced testicular weights. The outcomes of the reproductive activity from low and middle concentrations of CS treatments were identical and marked as low dose. The consequences were a partial blocking of regressing activity by SP. On the other hand, the animals treated with high dose of CS extract showed remarkable significance in comparison to the SP control, indicative of a complete blocking effect of the CS on the regressing testes by SP. There were a dose-dependent effects of the CS on the sexual function. These results suggest that the CS extract promotes the male fertility by strengthening the spermatogenesis in the golden hamsters.