• 한국수정란이식학회지
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• 제2권1호
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• pp.27-32
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• 1987

This study was carried out in order to find out better ways for superovuiation and egg collection by checking some factors affecting on donor cows such as iactating and dried, age, season of treatment and sequence of treatment. The results were summarized as follows:1. Number of corpus luteum and collected eggs of eactating and dried doner were 9.8 vs 8.0 and 9.6 vs 7.9,respectively. However, the rate of transferable embryos of lactating doner were higher than that of dried, 82.5% vs 48.1%. 2. The average number of corpus luteum and collected eggs of lactating donors under 7 years of age (6.7 vs lactating 5.3) were slightly lower than those of over 8 years of age (11.1 vs 9.2). But the rate of transferable embryoswas better in under 7 years old donors than over 8 years (81.1% vs 49.3%). were 6.0, 4.8, 1.5, 1.8 and 75%, and those in the summer were 2.9, 3.8, 2.2 and 46.7%, respectively. 3. The average number of corpus luteum was the highest in winter (10.5) and the rate of egg collection was the best in autumn (94.7%). The rate of the transferable embryo was the highest in winter (64.3%). 4. The average number of corpus luteum was the lowest (5.5) in the animals treated six or more superovulating treatments. The rate of egg collection was the best in the third treatment group (90.2%), but it was getting worse after fifth treatment, The rate of transferable embryos was the highest in the second treatment group (94.1%), and it was decreased thereafter.

• 농업과학연구
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• 제17권2호
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• pp.87-94
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• 1990

본(本) 연구는 한국재래오골계(韓國在來烏骨鷄)의 효율적(效率的)인 선발(選技) 및 육종계획(育種計劃)을 수립(樹立)하는데 필요(必要)한 경제형질(經濟形質)과 난구성분(卵構成分) 및 난질간(卵質間)의 유전상관(遺傳相關) 및 표현형상관(表現型相關)을 추정(推定)하고자 1987년(年) 6월(月) 18일(日)부터 1989년(年) 4월(月) 6일(日)까지 사육(飼育)되어온 재래오골계(在來烏骨鷄)에 대(對)한 자료(資料)를 분석(分析)하여 얻어진 결과(結果)를 요약(要約)하면 다음과 같다. 1. 경제형질(經濟形質)과 난구성분간(卵構成分間)의 유전상관(遺傳相關)은 체중(體重)과 난백중(卵白重), 난황중(卵黃重) 및 난성중간(卵聲重間)에 각각(各各) 0.083~0.591, 0.110~0.541 및 0.336~0.782로 정(正)의 계수(係數)이었고 초산일령(初産日令)과 난백중(卵白重), 난황중(卵黃重) 및 난성중간(卵聲重間)에는 각각(各各) 0.467~0.692, 0.256~0.631 및 0.420~0.519 이었으며 산란수(産卵數)와 난백중(卵白重), 난황중(卵黃重) 및 난성중간(卵聲重間)에는 각각(各各) -0.578~0.240, -0.255~0.060 및 -0.477~-0.313으로 낮은 부(負)의 계수(係數)이었으며, 난중(卵重)과 난백중(卵白重), 난황중(卵黃重) 및 난성중간(卵聲重間)에는 각각(各各) 0.825~0.939, 0.382~0.564 및 0.374~0.937로 높은 정(正)의 추정치(推定値)이었다. 2. 경제형질(經濟形質)과 난질간(卵質間)의 유전상관(遺傳相關)은 체중(體重)과 난형지수(卵型指數), 난성(卵聲)두께, 난백고(卵白高) 및 Haugh units 간(間)에 각각(各各) 0.215~0.367, 0.248~0.650, 0.161~0.624 및 0.157~0.499이었고, 산란수(産卵數)와 난형지수(卵型指數), 난성(卵聲)두께, 난백고(卵白高) 및 Haugh units간(間)에 각각(各各) -0.384~-0.207, -0.557~-0.306, -0.555~-0.198 및 -0.582~-0.074로 부(負)의 계수(係數)이었으며, 난성(卵重)과 난형지수(卵型指數), 난성(卵聲)두께, 난백고(卵白高) 및 Haugh units 간(間)에 각각(各各) 0.27~0.697, 0.290~0.627, 0.238~0.538 및 -0.207~0.020이었다.

• Asian-Australasian Journal of Animal Sciences
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• 제23권2호
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• pp.240-245
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• 2010

The effects of controlled energy restriction and duration of pre-incubation egg holding on fertility, hatchability and hatch losses were evaluated in aged broiler breeders (64 wk). The energy (ME) required for maintenance, activity, growth and anticipated egg production was calculated and offered to a control group (283-471 kcal/kg) from 21-64 weeks of age. In three other groups, ME was quantitatively reduced either by 20% (SER; severe energy restriction) or 10% (MER; moderate energy restriction) and increased by10% (EEF; excess energy feeding) over the control group (CER; controlled energy restriction). Each diet was offered to 130 pullets in individual cages, and the quantity of ME increased with age. At the end of 64 weeks, fertile eggs were collected from each dietary group for 11 consecutive days and grouped under 4 holding periods based on the length of storage (2, 5, 8 or 11 d). The influence of energy regimes, egg holding intervals and their interaction was evaluated on fertility, hatch losses and hatchability. Broiler breeders maintained on SER regime (231-419 kcal/d) produced maximum number of eggs (993) followed by MER (819), CER (624) and EEF (438) during the 11-day period. The percent fertility and hatchability was significantly (p$\leq$0.05) higher in SER and MER groups compared to CER and EEF. However, energy regimes did not influence the loss in egg weight during pre-incubation storage, shell weight, shell thickness or hatch losses as dead germs and dead in shell. The improvement in hatchability in SER and MER groups appeared to be closely related to higher fertility and lower embryonic mortality. Holding of eggs for 11 days showed a linear loss in egg weight with the length of storage, but did not influence the fertility and hatch losses. The percent hatchability on eggs set was maximum when storage period was restricted to 5 days. The interaction between energy regimes and egg holding periods exhibited better hatchability results with SER regime when eggs were held for 5 days. Response to MER was not different from SER. It was obvious that energy restriction during production period had a positive influence on egg number, fertility and hatchability in aged breeders. At 64 weeks of age, holding of fertile eggs for 5 days prior to incubation was adequate for optimum hatchability in breeders.

• Preventive Nutrition and Food Science
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• 제3권3호
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• pp.292-294
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• 1998

Surimi sol and gel were prepared by mixing egg albumin, starch, oil and carrageenan, which are used as representative ingredients in the surimi composite, at different ratio. Structural properties in surimi composite were investigated by examining the phase changes and dispersion pattern (average particle size, size range and the averge number of particle) of the particulate ingredients in sol and gel with an image analyzer. A staining technique of the specimen containing egg albumin in surimi gel was developed by adjusting pH of a toluidine staining solution. Image analysis revealed that size and density of ingredient particles were function of the level and dispersion of ingredients except of starch-incorporated surimi gel which showed maximum particle size at 6%.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 1998년도 추계학술대회 및 발표대회 강연 및 발표논문 초록집
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• pp.10-10
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• 1998

The growth process of solid grains in a liquid matrix is usually explained in tem1S of Ostwald ripening. The variation of growth (dissolution) rate as a function of grain size during Ostwald ripening predicted that the dissolution rate becomes very large as grain size decreases but the growth rate of a large grain is rather limited. Therefore. a rather uniform size distribution of grain size is maintained once after the quasi-equilibrium state is reached. Quite frequently, however, the exaggerated grain growth (EGG) is observed to occur: only a limited number of grains grow exceptionally. From the observation that the EGG occurs only for the faceted grains with apparently straight solid-liquid interfaces, the EGG is suggested to be the consequence of growth process controlled by 2-dimensional nucleation. In this study, the result by computer calculation on the grain growth process controlled by various mechanisms will be given.

• 한국가금학회지
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• 제13권2호
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• pp.179-186
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• 1986

본 연구는 1985년 5월부터 1986년 9월까지 천연기념물 265호인 한국재래조골계 총 749수와 45,340개의 종란에 대하여 수정율, 부화율, 생존율, 체중 그리고 산란성등을 조사하였는 바 얻어진 결과를 요약하면 다음과 같다. 1. 수정율은 82.2$\pm$1.37%(X＋S.E.)이고, 부화율은 79.0$\pm$1.91%였다. 2. 육추율은 90.5$\pm$1.69%, 육성율은 77.9$\pm$2.28%이고 성계생존율은 80.6$\pm$3.06%로 나타났다. 3. 체중은 부화시 31.5$\pm$0.43, 18 주령시 1209.3$\pm$17.29, 24 주령시 1646.1 $\pm$25.80, 44주령시 1975.3$\pm$49.56 그리고 72 주령시는 2096.7$\pm$40.83g이었다. 4. 초산일령은 은 165.5$\pm$1.69일이었고, 란중은 초산시, 44주령시, 72주령시에 각각35.7$\pm$0.49, 48.8$\pm$0.47, 50.2$\pm$0.44g이었다. 산란수는 44주령까지는 69.5$\pm$3.10개이고, 72 주령까지는 129.3$\pm$5.56개였다. 5. 체중과 초산일령사이에는 낮은 상관과 부의 관계가 있었다. 24주, 44주, 72주령의 체중과 란중간에는 정의 상관관계였으나, 이들 체중은 44주와 72주까지의 산란수에 대하여 유의한 부의 상관관계가 있었다. 초산일령은 초산시 란중에 대하여 정의 상관이었으나, 44주와 72주까지의 산란수에 대하여는 부의 상관관계가 있었다.

• 대한후두음성언어의학회지
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• 제18권1호
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• pp.26-32
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• 2007

Objective and Background: Laryngeal stroboscope is an useful equipment in evaluation of vocal cord vibration and in early detection of mucosal lesion including invasive cancer of the vocal cord. Recently Lee et al. (2006) developed portable stroboscope using voice as synchronization signal. It has been frequently impaired ability to synchronize the flashes even in normal female. Authors tried to investigate various methods including vibration pick-up, microphone, laryngeal microphone, and contact microphone for development of simple and accurate method like electroglottograph signal. The purpose of this study was to estimate wheher the vibration pick-up is available and is consistent with the signal of EGG. Subjects and Methods: Authors compared the signals between EGG and noncontact method such as voice, contact methods including vibration pick-up, laryngeal microphone, and contact microphone in normal twenty adults (male 10 and female 10). The number of peak in one cycle was compared with the number of the peak in EGG, and the percent of phase difference in the peak was compared with EGG Also, authors tried to investigate which site of vibration pick-up was most effective for synchronization of stobo flashes. Three site including anterior neck below the cricoid cartilage, thyroid ala, and suprahyoid region were analysed. Results: Among various methods for synchronization of strobo flashes, vibration pick-up was most effective method in peak detection. And anterior neck below cricoid cartilage was the most available site of the vibration pick-up. Conclusion: Authors suggest that vibration pick-up is most available and effective method for synchronization of strobo flashes.

• 생물환경조절학회지
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• 제11권3호
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• pp.133-138
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• 2002

본 실험은 가지과 작물의 염 스트레스에 대한 생장 특성 및 생리적 반응을 구명하기 위하여 수행되었다. 생육단계에 따라 NaCl을 농도별로 처리한 결과는 다음과 같았다. 초장, 생체중 등 생육은 유묘기 및 영양 생장기 모두 NaCl 농도가 높을수록 모든 작물에서 억제되었다 특히 토마토 및 가지에서는 NaCl 40mM 이상에서, 그리고 고추에서는 20mM 이상에서 작물의 생육이 크게 억제되었다. 수량은 토마토 및 가지에 서는 NaCl 20 mM 이상에서, 그리고 고추에서는 10 mM 이상에서 감소하였다. 이러한 수량감소는 낮은 농도에서는 착과수의 감소에, 그리고 농도가 높을수록 착과수의 감소와 더불어 평균과중의 감소의 영향이 컸다. 광합성 속도는 NaCl 농도가 높을수록 감소하는 경향이었으며. 고추가 가장 낮았고, 토마토, 가지 순으로 낮았다. 잎의 수분포텐셜과 기공 전도도도 광합성과 같은 경향을 나타냈다. 경엽의 무기 양분 함량에서는 질소, 인산, 칼슘, 마그네슘 및 칼륨 함량은 NaCl 농도가 증가할수록 감소하였으나 Na 및 Cl 함량은 증가하였다.

• 생태와환경
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• 제34권4호통권96호
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• pp.337-341
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• 2001

왜몰개, Aphyocypris chinensis의 산란에 미치는 수온의 영향을 알아보기 위하여, 19, 22, 25, $28{\circ}^C$ 수온에서 2개월 동안 사육을 하면서 산란횟수, 생산된 총 수정란 수, 산란간격 및 부화율 등을 조사하였다. $19{\circ}^C$와 $25{\circ}^C$사이에서는 수온이 증가하면 할수록 산란횟수, 생산된 총 수정란 수 및 수정란의 부화율이 증가하여 $25{\circ}^C$에 노출된 암컷과 수컷에서 가장 많은 산란횟수, 난 생산 및 부화성공률과 가장 짧은 산란간격을 나타냈다. 그러나 $28{\circ}^C$에서는 $25{\circ}^C$보다 수온이 증가했음에도 오히려 4개의 실험수온 중에서 가장 적은 산란횟수, 난 생산 및 부화율과 가장 긴 산란간격을 나타냈다.

• 한국수산과학회지
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• 제22권5호
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• pp.351-362
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• 1989

Ecology of Crangon affinis was studied in the Nakdong River Estuary fron June 1988 to May 1989. The growth rate of female was similar to that of male. Size differences, however, were apparent between female and male. Sex ratio varies with season. The major spawning season was from June 1988 to May 1989 except for November 1988. The number of eggs of the largest ovigerous female (35.55mm TL) was over 4,000, while that of the smallest ovigerous female (15.05mm TL) more than 120. The mean number of eggs was 1778. The size of winter eggs is larger than that of the summer eggs. The mean percentage of egg loss from brooding to hatching was $29.06\%$. The rate of egg loss decreases with increasing age. Major component of food organisms includes mysids and polycheates.