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장기간의 수영운동이 비만중년여성의 체조성 및 렙틴 호르몬에 미치는 영향
홍성찬 ( Sung Chan Hong ),이정윤 ( Jung Yun Lee ),염종우 ( Jong Woo Yeom ) 한국운동영양학회 2002 Physical Activity and Nutrition (Phys Act Nutr) Vol.6 No.2
The aims of this study is to evaluate the effects of regular swimming exercise on body composition and leptin in obese middle-aged women. In this study, swimming (HRmax 50-75%, 60 min/day, 5 day/week) was performed and 18 subjects were participated for study during 12 weeks, They were divided into two groups, one group as experimental group (n = 9) and the other as control group (n=9). Analytical items were body weight, % body fat, fat mass, BMI and leptin. All data were expressed as mean±standard deviation by using SPSS package program (win 9.0), independent and paired t-test was used to analyze the difference of the pre and post treatment between groups. For all statistics performed statistical significance was set at p<.05. After swimming training, body weight, % body fat, fat mass and BMI were significantly decreased, 2.99 ㎏, 3.86%, 3.39 ㎏, 1.19 ㎏/㎡ (P<.05), respectively. We found that the concentration of leptin was significantly reduced after treatment (4.70 ng/㎖, P<.01). It is concluded that swimming training for 12 weeks affects the body composition and leptin in obese middle-aged women. We recommend that regular swimming training is good for health, in particular prevention and treatment against obesity.
유기용매를 이용한 PVA/밀 글리아딘 블렌드 섬유의 제조 및 특성분석
곽효원,김무곤,오한진,이정윤,윤해성,이종환,이기훈,신봉섭,Kwak, Hyo-Won,Kim, Moo-Kon,Oh, Han-Jin,Lee, Jeong-Yun,Yun, Hae-Sung,Lee, Jong-Hwan,Lee, Ki-Hoon,Shin, Bong-Seob 한국섬유공학회 2011 한국섬유공학회지 Vol.48 No.4
In this study PVA/wheat gliadin blend fiber was prepared by wet spinning using DMSO as a solvent and acetone/methanol as a coagulant. The PVA content should be greater than 40% to demonstrate successful drawing. The maximum draw ratios of the blend fiber were 6, 7.5 and 8, when the PVA content was 40, 60 and 80%, respectively. The surface of the blend fiber became rougher and macrovoids were found when the content of gliadin was increased, this was due to the skin-core effect. The ultimate stress, breaking strain and modulus of the blend fiber were increased with an increase of the PVA content. The crystallinity of the blend fiber decreased when the gliadin content increased, the secondary structure of the gliadin however did not change in the presence of PVA. In order to increase the water stability of the blend fiber, further cross-linking was performed which also improved the mechanical properties of the blend fiber.
명현호 ( Myeong¸ Hyeon-ho ),장면 ( Jang¸ Myeon ),이점숙 ( Lee¸ Jeom-sook ),이정윤 ( Lee¸ Jong-yun ),최대훈 ( Choi¸ Dae-hun ) 한국도서(섬)학회 2021 韓國島嶼硏究 Vol.33 No.2
본 연구는 통영시 138개 무인도서의 관속식물 분포특성과 식생 조사를 위해 2019년 5월부터 10월까지 현지조사를 실시하였다. 조사지역에 분포하는 관속식물은 85과 301종 3아종 24변종 2품종 등 총 330분류군으로 조사되었다. 출현종에 대한 빈도분석을 한 결과 돌가시나무가 120로 가장 높은 빈도로 분석되었으며 억새(112회), 명아주(107회), 돈나무(102회), 곰솔(100회) 순으로 확인되었다. 환경 평가, 식물의 특성 및 서식처 보전 우선순위를 정하는데 활용되는 식물구계학적 특정 식물은 총 70 분류군으로 전체 출현종 중 21.21%를 나타났다. 또한 자생식물의 서식지를 침입해 생태계 영향을 미치는 귀화식물은 21종이 확인되었으며, 그중 망초(87회), 미국자리공(54회)로 나타났다. 해안선을 중심으로 생육하며, 염분스트레스나 혹독한 환경에서 살아가기 위해 형태 및 생리적으로 잘 적응한 염생식물은 32종이 생육하는 것으로 확인되었다. 출현 빈도를 분석 한 결과 해국, 갯장구채, 갯까치수염, 갯강아지풀 순으로 나타났다. 연안에 생육하는 염생식물은 광합성을 통해 흡수 효과적이다. 식물 생활형의 분류 방식으로 활용되고 있는 라운키에르 생활형으로 분류 한 결과 반지지중식물(H)이 87분류군(26.36%)으로 가장 많았으며, 그 다음으로 대형 육상식물(M)이 78분류군(23.64%), 일년생식물(Th)이 53분류군(16.06%)으로 나타났다. 식생은 대부분이 산지침염수림인 곰솔군락이 우점 분포하고 있으며 그 외에 소나무군락, 후박나무군락, 동백나무군락, 소사나무군락, 굴피나무군락, 느릅나무군락, 구실잣밤나무군락, 섬향나무군락, 밀사초군락, 참억새군락, 칡군락, 이대군락, 왕대군락 등이 분포하고 있었다. 조사지역은 지리학상 남해안아구에 속하고, 식생은 난온대삼림대에 해당되어 후박나무, 동백나무, 구실잣밤나무군락과 같은 상록활엽수림 천이가 활발하게 진행할 것으로 예상된다. 도서생물지리학 이론 관점에서 식물종 분포의 특성을 분석한 결과 도서면적에 대한 환경변수에 대해 출현종수(r<sup>2</sup>=0.6544)와 귀화식물(r<sup>2</sup>=0.524)에 대해서는 유의한 상관성을 나타났으나 귀화율 및 염생식물 출현양상은 상관성이 나타나지 않았다, 또한 육지와의 거리에 대해 출현 종수, 귀화식물, 귀화율, 염생식물은 상관성이 나타나지 않았다. 통영시 무인도서는 남해안 도서 중에서도 비교적 생태계 보전과 자연경관이 뛰어난 지역으로 식물상 및 식생 분포 특성에 대한 평가를 통해 효율적 관리방안을 수립하여야 한다. This survey was carried out to investigate the flora and vegetation of Tongyeong uninhabited island from May 2019 to October 2019. Vascular plants were identified as 330 taxa in total, including 85 families, 301 species, 3 subspecies, and 24 varieties, with 2 forms of Rosa wichuraiana s. showing the highest frequency at 120, followed by Miscanthus sinensis var. purpurascens(112 times), Chenopodium album var. centrorubrum (107 times), Pittosporum tobira(102 times), and Pinus thunbergii(100 times). There are a total of 70 taxa(21.21%) of floristic regional indicator plants specially designated by the Ministry of the Environment. 21 taxa of naturalized plants were also found, among them, in the order of Erigeron canadensis(87 times), and Phytolacca americana(54 times). Halophytes were identified as 31 species and the most frequent species were Aster spathulifolius, Silene aprica var. oldhamiana, Lysimachia mauritiana and Setaria viridis var. pachystachys. Furthermore Hemicryptophytes(H) had 87 taxa(26.36%), Microphanerophyte(M) was at 78 taxa(23.64%), and Therophytes(Th) stood at 53 taxa (16.06%), which showed a high proportional ratio in life forms. According to the physio-gnomic classification, this area can be divided into the following 5 categories. The deciduous broad-leaved forest, evergreen coniferous forest, evergreen broad-leaved forest, herb vegetation and plantation forest. such as Pinus densiflora, Pinus thunbergii, Machilus thunbergii, Camellia japonica, Carpinus turczaninowii, Platycarya strobilacea, Ulmus davidiana var. japonica, Castanopsis sieboldii, Juniperus chinensis, Carex boottiana, Miscanthus sinensis, Pueraria lobata, Pseudosasa japonica, and the Phyllostachys bambusoides community. Number of species and naturalized plants at the islands shows positive correlation with the size of the island (r<sup>2</sup>=0.6544, r<sup>2</sup>=0.524), but the correlations with distance from the mainland is not significant. The survey area is one of the southern coastal islands with a relatively excellent ecosystem of conservation and natural landscape. Therefore, for each island, management plans should be established for the sustainable development of uninhabited islands.