• 제목/요약/키워드: Reproductive period

검색결과 745건 처리시간 0.026초

온도 상승에 따른 콩 종실의 무기영양과 단백질 및 지방 함량 평가 (The Effects of Increased Temperature on Seed Nutrition, Protein, and Oil Contents of Soybean [Glycine max (L.)])

  • 이윤호;조현숙;김준환;상완규;신평;백재경;서명철
    • 한국작물학회지
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    • 제63권4호
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    • pp.331-337
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    • 2018
  • 온도는 콩 종실의 무기영양과 단백질 및 지방함량에 영향을 주는 환경요인 중의 하나이다. 본 연구는 향후 이상고온 현상을 대비하여 자연 조건과 가장 유사하게 만들어진 온도구배 챔버에 종실비대기에서 성숙기까지 콩 종실의 무기영양과 단백질 및 지방함량 변화에 대한 연구를 수행하였다. 1. 대원콩과 풍산나물콩은 온도 상승에 따라 성숙기에 질소를 제외한 다른 무기영양은 유의한 차이를 보이지 않았다. 2. 성숙기의 단백질 함량에 있어서 대원콩은 상승된 온도에 다소 감소를 하였다. 그러나 지방 함량은 대원콩이 상승된 온도인 Ta+4에서 증가 하였으나, 풍산나물콩은 감소하였다. 3. 100립의 무게가 증가 할수록 풍산물콩은 단백질 함량이 증가 하였고, 대원콩은 지방 함량이 증가 하였다. 4. 온도 상승은 종실의 이화학적 성분들을 변화 시킬 수 있다. 이상기상으로 온도가 지속적으로 상승 되었을 때 작물의 생육과 수량에 미치는 영향도 중요하지만, 인간의 음식섭취에 있어 미네랄과 단백질 그리고 지방함량과 같은 영양소 변화에 대한 대처도 중요 할 것이다.

숙주식물을 활용한 멸종위기야생식물II급 한라송이풀 종자의 형태 및 발아특성 (Form and Embryonic Characteristics of Pedicularis hallaisanensis Seeds As Endangered Wild Species II-Class Using Host Plants)

  • 김임규;박은희;강근혜;황부영;정현진;김민영;박정근;박삼봉;김봉규;추갑철
    • 한국산림과학회지
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    • 제108권3호
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    • pp.290-295
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    • 2019
  • 본 연구는 멸종위기야생식물 II급인 한라송이풀(Pedicularis hallaisanensis)을 대상으로 종자를 통한 번식체계 확립 가능성을 조사하기 위해 수행하였다. 한라송이풀의 종자 형태는 난형이고, 종피는 진갈색을 띠고 있다. 종자의 단면을 잘라 확인한 배는 왜소형(Dwarf type)이었다. 종자의 길이는 평균(${\pm}$표준편차) $0.47{\pm}0.07mm$이고, 너비는 $0.16{\pm}0.006mm$, 두께는 $0.12{\pm}0.01mm$로 나타났다. 종자 1립의 무게는 $0.0003{\pm}0.0001mg$이며, 천립중은 $4.59{\pm}0.02mg$으로 나타났다. Tetrazolium (TZ) 검정에 의한 한라송이풀 종자의 활력도는 75.33%로 나타났다. 한라송이풀을 4주간 $4^{\circ}C$에 저장한 후의 발아율은 71%로 가장 높았고, 6주간 처리 64%, 8주간 처리 60%로 나타나 저장 기간이 증가할수록 발아율은 낮아지는 경향을 보였다. 한라송이풀 종자에 영향을 미치는 숙주식물의 영향은 쑥에서 파종 후 53.5일에, 구절초는 62.5일에 최초로 발아를 하였다. 두 숙주식물에서 164일 이후에는 발아한 종자를 확인하지 못하였다. 쑥을 사용한 경우, 한라송이풀의 발아율은 평균 45.5%, 구절초는 19.5%로 나타났다. 평균 발아일수는 쑥에서 70.2일, 구절초에서는 46.8일로 나타났다.

사춘기 전 수컷 흰쥐의 저정낭과 전립선의 성숙에 미치는 Di(2-ethylhexyl) phthalate(DEHP)의 영향 (Effect of Prepubertal Exposure to Di(2-ethylhexyl)phthalate on the Maturation of Rat Seminal Vesicles and Prostate Glands)

  • 허현진;이원용;윤용달;최돈찬;이성호
    • 한국발생생물학회지:발생과생식
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    • 제12권3호
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    • pp.251-259
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    • 2008
  • 플라스틱 가소제인 di(2-ethylhexyl)phthalate (DEHP)는 매우 잘 알려진 내분비계 장애물질(endocrine disrupting chemicals; EDCs) 중 하나로, 수컷 설취류와 인간의 생식과 발생 과정에 있어 강력한 항안드로겐성 작용을 하는 것으로 알려져 있다. 본 연구는 사춘기 이전에 수컷 흰쥐를 DEHP에 노출시킴으로써 부속 성기관의 성숙 과정 동안 나타나는 변화를 조사한 것이다. 결과로, DEHP 투여에 의한 체중, 혈중 T 수준, 저정낭과 전립선을 제외한 조직의 무게는 대조군과 비교하여 유의적인 변화가 없었다. 저정낭의 경우, 고농도(200 mg/kg)의 DEHP를 처리한 투여군의 무게가 대조군에 비해 유의하게 감소하였으며(p<0.05), 전립선의 경우, 저농도(20 mg/kg)와 고농도의 DEHP를 처리한 모든 투여군에서 대조군에 비해 유의한 무게의 감소를 나타내었다(p<0.05). 조직학적 연구 결과, DEHP 투여군의 저정낭은 대조군에 비해 점막층의 면적이 감소하였다. 또한, 전립선의 경우 대조군에서는 분비상피세포들이 입방형인데 비해 DEHP 투여군에서는 위중층상피세포 형태가 관찰되었다. 정량적 RT-PCR 연구에서, 저정낭에서의 ER-$\alpha$ 발현은 고농도 DEHP 투여에 의해 유의한 발현증가가 나타났으며(p<0.05), ER-$\beta$의 경우 저농도 DEHP 투여에 의해 유의한 발현 감소가 나타났다(p<0.05). 전립선에서의 ER-$\beta$ 수준은 저농도 DEHP 투여에 의해 유의하게 감소하나(p<0.05), 고농도 DEHP 투여에 의해서는 유의한 발현증가가 나타났다(p<0.01). 그러나 AR 발현의 경우, 저정낭과 전립선 모두에서 DEHP에 의해 유의한 차이가 나타나지않았다. 결론적으로, 본 연구는 (i) DEHP의 유해한 작용이 사춘기 이전 시기의 성적인 성숙을 교란할 수 있으며, (ii) 저정낭과 전립선이 사춘기 이전 시기 DEHP 노출에 대한 민감한 표적이 될 수 있고, (iii) DEHP의 유해한 작용이 ER과 연관된 기작을 통해 매개될 수 있음을 시사한다.

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평년기상을 활용한 우리나라의 콩 재배지역 구분 (Classification of Cultivation Region for Soybean (Glycine max [L.]) in South Korea Based on 30 Years of Weather Indices)

  • 윤동경;박재성;서진희;원옥재;최만수;이현수;이채원
    • 한국작물학회지
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    • 제69권1호
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    • pp.49-60
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    • 2024
  • 우리나라 주요 밭작물의 하나인 콩 재배에서 기상에 맞는 재배 양식 개발이 필요함에 따라 콩 작황시험 생육 및 수량 조사 데이터를 이용해 콩에 영향을 끼치는 기상요소를 추출하고 재배지역을 구분하였다. 1. 밀양과 수원지역의 콩 10년 동안의 작황시험 결과와 기상자료 간의 상관분석을 통해 콩에 영향을 미치는 기상요소를 분석한 결과, 생육 특성과 영양생장기 기상과의 상관관계는 일교차, 강수량과 최저온도에서 높게 나타났으며, 수량특성과 생식생장기 기상과는 일교차, 강수량, 최고온도에서 유의한 상관관계를 보였다. 2. 추출한 기상요소와 위도, 해발고도를 포함해 콩의 재배지역 구분을 위해 k-means clustering을 실시한 결과, 지역은 세 가지로 나누어졌으며, zone 1은 중부내륙지역과 경기도 남부지역, zone 2는 서해안 남부지역, 동해안 남부지역과 남해지역, zone 3은 경기도 동부 일부지역과 강원도 및 해발고도가 높은 지역이 포함되었다. 3. 세 가지 지역 중 위도의 범위가 넓은 zone 1을 세 가지 지역으로 세분한 결과, Zone 1-1은 다른 두 지역에 비해 위도가 낮았으며, 강수량이 적은 특징을 가진다. Zone 1-2는 다른 두 지역에 비해 짧은 일조시간과 높은 기온이 특징적이었다. Zone 1-3은 위도 상으로는 두 지역의 중앙에 위치해 있으며, 일조 시간이 길면서 일교차가 큰 특징이었다. 4. 본 연구에서 콩 재배를 위한 한국의 재배지역은 크게 3가지로 구분되었으며, 작게는 5가지 지역으로 구분되었다. 기상 요소 및 생육 정보를 기반으로 한 재배지역을 구분함으로써 국내 콩 생산에 기여할 수 있는 새로운 정보를 제공하였다.

가족계획과 모자보건 통합을 위한 조산원의 투입효과 분석 -서산지역의 개입연구 평가보고- (An Intervention Study on Integration of Family Planning and Maternal/Infant Care Services in Rural Korea)

  • 방숙;한성현;이정자;안문영;이인숙;김은실;김종호
    • Journal of Preventive Medicine and Public Health
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    • 제20권1호
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    • pp.165-203
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    • 1987
  • This project was a service-cum-research effort with a quasi-experimental study design to examine the health benefits of an integrated Family Planning (FP)/Maternal & Child health (MCH) Service approach that provides crucial factors missing in the present on-going programs. The specific objectives were: 1) To test the effectiveness of trained nurse/midwives (MW) assigned as change agents in the Health Sub-Center (HSC) to bring about the changes in the eight FP/MCH indicators, namely; (i)FP/MCH contacts between field workers and their clients (ii) the use of effective FP methods, (iii) the inter-birth interval and/or open interval, (iv) prenatal care by medically qualified personnel, (v) medically supervised deliveries, (vi) the rate of induced abortion, (vii) maternal and infant morbidity, and (viii) preinatal & infant mortality. 2) To measure the integrative linkage (contacts) between MW & HSC workers and between HSC and clients. 3) To examine the organizational or administrative factors influencing integrative linkage between health workers. Study design; The above objectives called for quasi-experimental design setting up a study and control area with and without a midwife. An active intervention program (FP/MCH minimum 'package' program) was conducted for a 2 year period from June 1982-July 1984 in Seosan County and 'before and after' surveys were conducted to measure the change. Service input; This study was undertaken by the Soonchunhyang University in collaboration with WHO. After a baseline survery in 1981, trained nurses/midwives were introduced into two health sub-centers in a rural setting (Seosan county) for a 2 year period from 1982 to 1984. A major service input was the establishment of midwifery services in the existing health delivery system with emphasis on nurse/midwife's role as the link between health workers (nurse aids) and village health workers, and the referral of risk patients to the private physician (OBGY specialist). An evaluation survey was made in August 1984 to assess the effectiveness of this alternative integrated approach in the study areas in comparison with the control area which had normal government services. Method of evaluation; a. In this study, the primary objective was first to examine to what extent the FP/MCH package program brought about changes in the pre-determined eight indicators (outcome and impact measures) and the following relationship was first analyzed; b. Nevertheless, this project did not automatically accept the assumption that if two or more activities were integrated, the results would automatically be better than a non-integrated or categorical program. There is a need to assess the 'integration process' itself within the package program. The process of integration was measured in terms of interactive linkages, or the quantity & quality of contacts between workers & clients and among workers. Intergrative linkages were hypothesized to be influenced by organizational factors at the HSC clinic level including HSC goals, sltrurture, authority, leadership style, resources, and personal characteristics of HSC staff. The extent or degree of integration, as measured by the intensity of integrative linkages, was in turn presumed to influence programme performance. Thus as indicated diagrammatically below, organizational factors constituted the independent variables, integration as the intervening variable and programme performance with respect to family planning and health services as the dependent variable: Concerning organizational factors, however, due to the limited number of HSCs (2 in the study area and 3 in the control area), they were studied by participatory observation of an anthropologist who was independent of the project. In this observation, we examined whether the assumed integration process actually occurred or not. If not, what were the constraints in producing an effective integration process. Summary of Findings; A) Program effects and impact 1. Effects on FP use: During this 2 year action period, FP acceptance increased from 58% in 1981 to 78% in 1984 in both the study and control areas. This increase in both areas was mainly due to the new family planning campaign driven by the Government for the same study period. Therefore, there was no increment of FP acceptance rate due to additional input of MW to the on-going FP program. But in the study area, quality aspects of FP were somewhat improved, having a better continuation rate of IUDs & pills and more use of effective Contraceptive methods in comparison with the control area. 2. Effects of use of MCH services: Between the study and control areas, however, there was a significant difference in maternal and child health care. For example, the coverage of prenatal care was increased from 53% for 1981 birth cohort to 75% for 1984 birth cohort in the study area. In the control area, the same increased from 41% (1981) to 65% (1984). It is noteworthy that almost two thirds of the recent birth cohort received prenatal care even in the control area, indicating that there is a growing demand of MCH care as the size of family norm becomes smaller 3. There has been a substantive increase in delivery care by medical professions in the study area, with an annual increase rate of 10% due to midwives input in the study areas. The project had about two times greater effect on postnatal care (68% vs. 33%) at delivery care(45.2% vs. 26.1%). 4. The study area had better reproductive efficiency (wanted pregancies with FP practice & healthy live births survived by one year old) than the control area, especially among women under 30 (14.1% vs. 9.6%). The proportion of women who preferred the 1st trimester for their first prenatal care rose significantly in the study area as compared to the control area (24% vs 13%). B) Effects on Interactive Linkage 1. This project made a contribution in making several useful steps in the direction of service integration, namely; i) The health workers have become familiar with procedures on how to work together with each other (especially with a midwife) in carrying out their work in FP/MCH and, ii) The health workers have gotten a feeling of the usefulness of family health records (statistical integration) in identifying targets in their own work and their usefulness in caring for family health. 2. On the other hand, because of a lack of required organizational factors, complete linkage was not obtained as the project intended. i) In regards to the government health worker's activities in terms of home visiting there was not much difference between the study & control areas though the MW did more home visiting than Government health workers. ii) In assessing the service performance of MW & health workers, the midwives balanced their workload between 40% FP, 40% MCH & 20% other activities (mainly immunization). However, $85{\sim}90%$ of the services provided by the health workers were other than FP/MCH, mainly for immunizations such as the encephalitis campaign. In the control area, a similar pattern was observed. Over 75% of their service was other than FP/MCH. Therefore, the pattern shows the health workers are a long way from becoming multipurpose workers even though the government is pushing in this direction. 3. Villagers were much more likely to visit the health sub-center clinic in the study area than in the control area (58% vs.31%) and for more combined care (45% vs.23%). C) Organization factors (admistrative integrative issues) 1. When MW (new workers with higher qualification) were introduced to HSC, it was noted that there were conflicts between the existing HSC workers (Nurse aids with less qualification than MW) and the MW for the beginning period of the project. The cause of the conflict was studied by an anthropologist and it was pointed out that these functional integration problems stemmed from the structural inadequacies of the health subcenter organization as indicated below; i) There is still no general consensus about the objectives and goals of the project between the project staff and the existing health workers. ii) There is no formal linkage between the responsibility of each member's job in the health sub-center. iii) There is still little chance for midwives to play a catalytic role or to establish communicative networks between workers in order to link various knowledge and skills to provide better FP/MCH services in the health sub-center. 2. Based on the above findings the project recommended to the County Chief (who has power to control the administrative staff and the technical staff in his county) the following ; i) In order to solve the conflicts between the individual roles and functions in performing health care activities, there must be goals agreed upon by both. ii) The health sub·center must function as an autonomous organization to undertake the integration health project. In order to do that, it is necessary to support administrative considerations, and to establish a communication system for supervision and to control of the health sub-centers. iii) The administrative organization, tentatively, must be organized to bind the health worker's midwive's and director's jobs by an organic relationship in order to achieve the integrative system under the leadership of health sub-center director. After submitting this observation report, there has been better understanding from frequent meetings & communication between HW/MW in FP/MCH work as the program developed. Lessons learned from the Seosan Project (on issues of FP/MCH integration in Korea); 1) A majority or about 80% of the couples are now practicing FP. As indicated by the study, there is a growing demand from clients for the health system to provide more MCH services than FP in order to maintain the achieved small size of family through FP practice. It is fortunate to see that the government is now formulating a MCH policy for the year 2,000 and revising MCH laws and regulations to emphasize more MCH care for achieving a small size family through family planning practice. 2) Goal consensus in FP/MCH shouBd be made among the health workers It administrators, especially to emphasize the need of care of 'wanted' child. But there is a long way to go to realize the 'real' integration of FP into MCH in Korea, unless there is a structural integration FP/MCH because a categorical FP is still first priority to reduce the rate of population growth for economic reasons but not yet for health/welfare reasons in practice. 3) There should be more financial allocation: (i) a midwife should be made available to help to promote the MCH program and coordinate services, (in) there should be a health sub·center director who can provide leadership training for managing the integrated program. There is a need for 'organizational support', if the decision of integration is made to obtain benefit from both FP & MCH. In other words, costs should be paid equally to both FP/MCH. The integration slogan itself, without the commitment of paying such costs, is powerless to advocate it. 4) Need of management training for middle level health personnel is more acute as the Government has already constructed 90 MCH centers attached to the County Health Center but without adequate manpower, facilities, and guidelines for integrating the work of both FP and MCH. 5) The local government still considers these MCH centers only as delivery centers to take care only of those visiting maternity cases. The MCH center should be a center for the managment of all pregnancies occurring in the community and the promotion of FP with a systematic and effective linkage of resources available in the county such as i.e. Village Health Worker, Community Health Practitioner, Health Sub-center Physicians & Health workers, Doctors and Midwives in MCH center, OBGY Specialists in clinics & hospitals as practiced by the Seosan project at primary health care level.

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