• Title/Summary/Keyword: 성장 발육

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Growth and EVelopment of Pygidiopsis summa in Rats and Mice with a Supplementary Note on Its Morphological Characters (Pygidiopsis summa의 흰쥐와 마우스내에서의 성장발육 및 충체 형태학적 특징에 대한 검토)

  • 금종일;서병설
    • Parasites, Hosts and Diseases
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    • v.24 no.1
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    • pp.55-62
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    • 1986
  • The growth and development of Pygidiopsis summa were studied in experimental rats and mice, and a special reference was given to its morphological characters differed from the type species, P. genata. The metacercariae were obtained from young mullets (Mugil sp.), and total 21 rats and mice infected each with 1,000 metacercariae. Worms of various ages of infection, from 3 to 28 days, were subjected to a microscopic observation. The worms grew rapidly and remarkably in size up to 10 days of infection, to become 0.53~0.82mm long and 0.31~0.39mm wide, but nearly stopped the growth thereafter. Their genital organs developed more rapidly and fully matured within 3~5 days. At 3 days several eggs were found in uterus. The presence of two groups of small spines, 5~6 on the right and 7~9 on the left side of the genital apparatus, was a new finding in this study and considered a distinct character of P. summa. The morphology of ventral sucker and intestinal ceca was also different from P. genata. This study confirms the validity of the species, P. summa.

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Infectivity of Parngonimus westermani developing in a final host to another final host (종숙주에서 발육중인 폐흡충의 종숙주에 대함 감염력)

  • Yoon Kong;Hyun Jong Yang;Seung-Yull Cho
    • Parasites, Hosts and Diseases
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    • v.32 no.4
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    • pp.277-280
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    • 1994
  • In the definitive hosts, metacercariae of Parofonimn westermani excyst in host duodenum, penetrate intestinal wall, migrate peritoneal and thoracic cavities, and develop to sexual maturity in 8 weeks. This study was undertaken to examine the age of the maturing p. westernnni when their infectivity to the other definitive hosts was retained. On 3, 7, 10, 14,21 and 28 days after feeding the metacercariae to cats through a gastric tube, the developing worms were harvested. The juveniles of different age were fed again to other experimental cats. One to 12 weeks after the oral-transfer infections, the experimental cats were examined for establishment of infections. In the cats to which 3- day and 7-day old juveniles (grown up to 1.4 mm long) were fed, 31.4% and 22.6% of the transferred worms were found infected. The worms of 10-28 days old were not infective. Early maturing stages grown up to 7 days maintained their infectivity to the other definitive hosts.

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당뇨병관리, 소아에서 노인까지- 소아당뇨인을 위한 식사요법

  • Gang, Yeon-Ha
    • The Monthly Diabetes
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    • s.192
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    • pp.12-16
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    • 2005
  • 소아 당뇨병은 성인 당뇨병의 축소판이 아니며 성장과 발육을 고려하여야 하고 성장에 따른 지속적인 추구관리가 이루어져야 한다는 점이 중요하다. 또한 아동들의 식욕을 조절하며 간식과 외식, 추가 운동, 여행, 생일 파티 참석 등 발생될 수 있는 특별한 경우에는 상황에 맞춰 혈당조절을 해야 한다.

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Metacercariae of Echinostoma cinetorchis encysted in the fresh water snail, Hippeutis (Helicorbis) cantori, and their development in rats and mice (담수만 패류 Hippeutis cantori에 피낭한 이전고환극구흡충의 피낭유충 및 흰쥐와 마우스에서의 성장발육)

  • 이순형;이준기
    • Parasites, Hosts and Diseases
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    • v.26 no.3
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    • pp.189-198
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    • 1988
  • The fresh water snail, Hippeutis (Helicorbis) cantori, caught from the rice paddies in Namyangju-gun, Gyeonggi.do, was found to be a new second inter- mediate host of 5. cinetorchis in Korea. The metacercariae were found from 89 (76.7%) out of 116 snails examined and the average metacercarial burden was 4.7 per infected snail. Some developmental characteristics of 5. cinetorchis were observed after experimental infection of the metacercariae to rats and mice.

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Effects of Growth Factors and Hexoses on In Vitro Development in Porcine Embryos (돼지수정란의 체외발육에 있어서 Growth Factors와 Hexoses의 영향)

  • 윤선영;이상영;정희태;양부근;김정익;박춘근
    • Korean Journal of Animal Reproduction
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    • v.27 no.3
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    • pp.249-258
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    • 2003
  • The aim of this study was to investigate the effects of different hexoses in medium with IGF-I and/or EGF on in vitro development of porcine embryos. In first experiment, when the embryos were cultured in medium with concentrations of 5 ng/ml IGF-I and 10 ng/ml EGF, the morula and blastocyst rates were higher than in another culture conditions (P<0.05). In second experiment, the effect of IGF-I in medium with different hexoses during the embryo culture was examined. The higher cleavage rates were obtained in medium with glucose and IGF-I (P<0.05). However, the higher proportion of embryos developed to morula and blastocyst stages in medium with IGF-I were obtained than in medium without IGF-I in medium with glucose, mannose and galactose. In third experiment, the effect of EGF on in vitro development of porcine embryos in medium with different hexoses were examined. In the culture medium was supplemented with glucose, the higher proportions (P<0.05) of embryos developed to molura and blastocyst stages were obtained in medium with that than without EGF. However, the proportions of embryos developed to blastocyst stage were not significantly different between with and without of EGF in medium with different hexoses. In firth experiment, the effects of presence of IGF-I and EGF in medium with different hexoses on in vitro development of porcine embryos were examined. When culture medium was supplemented with IGF-I and EGF, the higher proportions of oocytes cleaved and developed to 8-cell stage were obtained in medium with glucose than mannose, galactose and fructose (P<0.05). These results show that glucose and growth factors, supported the development in vitro of porcine embryos, especially with greater embryo cleavage and development in medium with glucose added to media with IGF-I and/or EGF.