• Title, Summary, Keyword: Hormones

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Analysis of the Consumers' Awareness and Information Need for Food Safety -Focused on irradiated foods and environmental hormones- (소비자의 식품 안전성에 대한 인지도 및 정보요구도에 관한 분석 -방사선조사 식품과 환경호르몬을 중심으로-)

  • Kim, Hyo-Chung;Kim, Mee-Ra
    • Journal of the Korean Society of Food Culture
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    • v.17 no.2
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    • pp.153-164
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    • 2002
  • This study examined the consumers' awareness and information need toward the irradiated foods and environmental hormones. The data were collected from 350 adults living in Daegu and Busan by the self-administered questionnaire. Frequencies and chi-square tests were conducted by SPSS. The results of the survey were as follows: (1) consumers' awareness regarding the irradiated foods and environmental hormones were low, while consumers' concerns for them were high, (2) the orders of the information needs for the irradiated foods are safety of irradiated foods, dose permitted for food irradiation, benefits of irradiated foods, kinds of permitted irradiated foods, and legislations of food irradiation, and (3) the orders of the information needs for the environmental hormones are harmfulness of environmental hormones, standards for contamination by environmental hormones, materials releasing environmental hormones, methods to prevent environmental hormones, and kinds of environmental hormones.

Determination of hormonal active compounds in meat (육류 식품중 호르몬 성분의 분석)

  • Seo, Jungju
    • Analytical Science and Technology
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    • v.21 no.6
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    • pp.526-534
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    • 2008
  • To determine the trace level of synthetic and natural hormones in food, the improvement of official analytical method and new development of simultaneous determination of hormones were established. On the basis of developed analytical method, the background level of natural hormones and distribution of residual hormones were monitored in meat. Target hormones were six natural hormones such as estrogens ($17{\beta}$-estradiol, $17{\alpha}$-estradiol, estrone), androgens ($17{\beta}$-testosterone, $17{\alpha}$-testosterone), and gestagens (progesterone) and three synthetic hormones such as DES, zeranol, and taleranol. These hormones were analyzed by gas chromatographymass spectrometry. Newly developed multi-residue analysis method was applied for meat sample which were collected from market in the capital region and monitored the presence of residues of synthetic and natural steroid hormones. No residue of synthetic hormones were detected and endogenous level of progesterone was detected in cattle, pig and liver samples tested.

Factors associated with Behaviors that Reduce Exposure to Environmental Hormones among Nursing Students (환경호르몬 저감행동 영향요인)

  • Lee, Jungsuk;Bea, Hanju;Kim, HyeJin
    • Korean Journal of Occupational Health Nursing
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    • v.28 no.4
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    • pp.285-292
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    • 2019
  • Purpose: This study aimed to examine the factors associated with behavior that reduces exposure to environmental hormones among nursing students. Methods: Data were collected from 160 nursing students in D and B cities, using self-report questionnaires. Data were analyzed using SPSS 22.0, and the analyses included descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient test, and stepwise multiple regression. Results: Behavior that reduces exposure to environmental hormones differed significantly in terms of the participants' knowledge about environmental hormones. Behavior that reduces exposure to environmental hormones was negatively correlated with knowledge of environmental hormones, attitude towards pro-environmental behavior, and environmental self-efficacy; these factors were significant predictors of behavior that reduces exposure to environmental hormones, and accounted for 27.0% of the variance. Conclusion: Environmental self-efficacy was identified as the most significant factor affecting behavior that reduces exposure to environmental hormones in nursing students. Therefore, it is necessary to develop programs to improve pro-environmental behavior and environmental self-efficacy in nursing students.

Reactive Oxygen Species Co-Operated with Sex Hormones Inhibit Proliferation of Hepal-6 Cells

  • Wang Ai-Guo;Kim Nam-Soon;Lee Dong-Seok
    • Biomedical Science Letters
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    • v.11 no.3
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    • pp.253-258
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    • 2005
  • Reactive oxygen species (ROS) and sex hormones affect the proliferation of cells and are believed to play important roles in tumorigenesis. However, little is known regarding how these two factors interact to affect cell proliferation. In this study, hepal-6 cells were treated with ROS and sex hormones (testosterone and steroidal) either separately or in combination. The sex hormones had no significant influence the cell proliferation up to a concentration of $1{\mu}M$. However, cell proliferation was inhibited when the cells were treated simultaneously with $H_2O_2$, which alone was found to promote cell proliferation at the concentrations of $15{\mu}M$. In conclusion, this study indicates that instead of promoting the cell proliferation, ROS interact with sex hormones to inhibit the Hepa 1-6 cell proliferation.

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The Reproductive Patterns of Endangered Captive Orangutans by Analysing the Sex Hormones in Feces (분변내 성호르몬의 분석을 통한 멸종위기 사육 오랑우탄에서의 번식형태)

  • Jung, So-Young;Kim, Bo-Sook;Yoon, Yong-Dal
    • Journal of Veterinary Clinics
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    • v.30 no.1
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    • pp.22-26
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    • 2013
  • To monitor the reproductive patterns of endangered orangutan, Time-resolved fluorescence immuno assay (TR-FIA) were used to analyze metabolites of sex hormones in feces. Orangutan had long-term interbirth intervals (amenorrhea) during lactation period in which the secretion of sex hormones was repressed. The concentration of progesterone in the serum of pregnant orangutan was 30fold higher than that in non-pregnant orangutan. However, the concentration of hCG during pregnant period was different from the result of other primates. The present study suggested that age is not the important factor in determining the reproduction capability, because it is rather greatly influenced by the combination of various factors. Tracing metabolites of sex hormones in orangutan feces seems to be provide the effective solution for the infertility in orangutan. This study result shows the basic data in operating conservation project for endangered orangutan.

Sensitive Determination of Natural and Synthetic Steroidal Hormones of a Free and Conjugated Form in Surface Water by Gas Chromatography-Mass Spectrometry

  • Shin, Ho-Sang;Oh, Jin-Aa;Shin, Sun-Kyoung
    • Bulletin of the Korean Chemical Society
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    • v.32 no.3
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    • pp.809-814
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    • 2011
  • A method based on the TMS derivatives and acidic hydrolysis was developed for the simultaneous determination of free and conjugated steroidal hormones in surface water. A silylation of five natural and two synthetic steroidal hormones was achieved with N-methyl-N-(trimethylsilyl) trifluoroacetamide/$NH_4I$ (1000:3) under catalysis of dithioerythritol for 60 min at $80^{\circ}C$. TMS derivatives of the steroid hormones containing multifunctional groups offer a single derivative product under this condition. The accuracy of the analytes was in the range of 87 to 110% at a concentration of 20 and 50 ng/L with relative standard deviations of less than 10%. The method detection limit was in the range of 0.01 to 0.02 ng/L for surface water. Natural steroidal hormones were detected in a concentration range of 0 to 1.03 ng/L in free form and 0 to 14.6 ng/L in conjugated form, respectively. We found that most of the natural hormonal steroids exist in conjugate forms (43 to 100%) in river water.

Shaping of Hormone drug Knowledge and drug market: Athletes use and consumption of synthetic hormones (호르몬 약물 지식과 시장의 형성: 운동선수들의 합성 호르몬 사용과 소비)

  • Han, Gwnag Hee;Kim, Byung Soo
    • Journal of Science and Technology Studies
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    • v.14 no.1
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    • pp.87-116
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    • 2014
  • This article focuses on synthetic hormone consumption that illegal act of heterogeneous forms of pharmaceuticalization. Athletes are not unfamiliar with the use of synthetic hormones that contain anabolic steroids. Synthetic hormones are used to increase muscle mass and strength. This drug use practice cannot simply be viewed as illegal. Athletes accumulate knowledge on these hormones that conflicts with the knowledge proffered by physicians and they consume drugs responsibly. Physicians' knowledge of these hormones is limited to their use in the treatment of abnormalities. Athletes, however, are expanding the role of these hormones to include their potential for enhancement. Thereby, a new value is assigned to synthetic hormones, and an informal market is formed. Previous studies in the fields of biopolitics and biomedicalization have mainly focused on the formal connection between biomedical science and the institutional network. This article, therefore, analyzes the informal and the various aspects of biomedicalization.

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Effect of Hormones on Pig Oocytes Maturation and Fertilization In Vitro (호르몬 첨가가 돼지 난포란의 체외성숙과 체외수정에 미치는 영향)

  • 권건오;정영채;김창근;윤종택;최선호;류범용
    • Korean Journal of Animal Reproduction
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    • v.14 no.3
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    • pp.223-230
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    • 1990
  • This experiment was carried out to investigate in vitro maturation rate of pig follicular oocytes cultured from 30 to 48hr in TCM 199 supplemented with gonadotropins(FSH, LH) and estradiol-17$\beta$ and in vitro fertilization with ejaculated sperm preincubated in BO medium containing 2mM caffein and development of IVF oocytes. The results obtained in this experiments were as follows ; 1. In addition of hormones, in vitro maturation rate of follicular oocyte increased gradually from 36hr and 74.47% at 48hr in addition of hormones, but there was no differences among in vitro maturation rates after 36hr of culture. 2. Penetration rate of pig oocytes matured in FSH+LH+E2 and FSH+E2 was 71.8%, 71.0% and significantly increased by the addition of hormones. 3. Percentage of developed oocytes was 44.4% for oocytes matured in FSH+LH+E2-added medium and 48.7% for oocytes matured in FSH+E2-added medium, respectively. 4. Two to 16 cells stage embryos were obtained only when pig oocytes matuerd in vitro in hormones-added medium and 72hr after IVF. 5. From present results, it is concluded that gonadotropins and estradiol17$\beta$ can enhance in vitro fertilization and subsequent development as well as in vitro maturation pig follicular oocytes.

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Duty-Dependent Changes in Stress Hormones of Firefighters (일부 소방공무원의 업무에 따른 스트레스 호르몬의 변화)

  • Kim, Kyoo-Sang;Yoo, Seung-Won;Won, Yong-Lim;Lee, Mi-Young
    • Journal of Environmental Health Sciences
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    • v.38 no.3
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    • pp.195-203
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    • 2012
  • Objectives: This paper aims to investigate the influence on stress hormones of job stress resulting from firefighting duties, as well as the degree of such influence. Methods: KOSS-26 and stress hormones such as norepinephrine (NE), epinephrine (EPI), adrenocorticotrophic hormone (ACTH), and cortisol were analyzed for 191 male firefighters from the western area of Incheon, the Incheon Industrial Complex, and Bucheon, Korea. Job stress and stress hormones were compared between a office working group and field-working group. Results: There was no significant difference in EPI and ACTH between the two groups. Change of stress hormones prior to engaging in typical duties, following typical duties, and immediately after field activities was examined. All the EPI, ACTH, and cortisol showed statistically significant changes with time, but not NE in the blood. In the field-working group, the cortisol levels in the blood of the firefighting and rescue groups showed notable differences depending on the time at which the measurements were taken. Conclusion: The differences in stress hormone levels depending on the type of duties of the firefighters were identified. Thus, interventions proper to job requirements is required in order to ease stress.