• 한국환경생태학회지
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• 제37권3호
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• pp.192-197
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• 2023

본 연구는 서울대공원 인공사육장에서 남생이(Mauremys reevesii) 알의 부화온도 차이에 따른 부화기간과 성장에 영향을 주는지 알아보고자 연구했다. 전체 201개의 남생이 알을 26(n=89)℃, 28(n=75)℃ 그리고 32(n=37)℃에서 각각 부화시켰다. 남생이 알의 부화온도와 부화기간은 온도에 따라 유의미한 차이를 나타내었다. 본 연구에서 부화 온도가 높을수록 부화율이 증가하였다. 26℃, 28℃, 그리고 32℃에서 부화한 알의 부화 기간은 각각 66.1(±4.0, n=52)일, 65.3(±3.3, n=44)일 그리고 58.8(±7.7, n=31)일이었다. 부화율은 32℃(83.8%)가 26℃(58.4%)와 28℃(58.7%)보다 상대적으로 높았다. 32℃에서 부화한 14일 된 새끼의 몸무게가 26℃와 28℃에서 부화한 14일 된 새끼의 몸무게보다 높았다. 그렇지만 부화 후 180일과 270일에 새끼의 몸무게는 부화 온도에 따라 큰 차이가 없었다. 본 연구에서 한국산 남생이(M. reevesii) 알의 부화 온도가 부화 기간과 성장 초기 남생이의 체중에 유의한 영향을 미치는 것으로 나타났다.

• Journal of Electrochemical Science and Technology
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• 제3권1호
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• pp.24-28
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• 2012

The electrocatalytic activities and surface roughness of indium-tin-oxide (ITO) electrodes have been investigated after thermal treatment at 100, 150, or $200^{\circ}C$ for 30 min, 2 h, or 8 h. To check electrocatalytic activities, the electrochemical behavior of four electroactive species (p-hydroquinone, $Ru(NH_3){_6}^{3+}$, ferrocenemethanol, and $Fe(CN){_6}^{4-}$) has been measured. The electron transfer rate for p-hydroquinone oxidation and ferrocenemethanol oxidation increases with increasing the incubation temperature and the incubation period of time, but the rate for $Ru(NH_3){_6}^{3+}$ is similar irrespective of the incubation temperature and period because $Ru(NH_3){_6}^{3+}$ undergoes a fast outer-sphere reaction. Overall, the electrocatalytic activities of ITO electrodes increase with increasing the incubation temperature and period. The surface roughness of ITO electrodes increases with increasing the incubation temperature, and the thermal treatment generates many towering pillars as high as several tens of nanometer.

• 한국재료학회지
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• 제12권5호
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• pp.363-368
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• 2002

we proposed the use of $Si_2H_ 6/H_2$ chemistry for selective silicon epitaxy growth by low-pressure chemical vapor deposition(LPCVD) in the temperature range $600~710^{\circ}C$ under an ultraclean environment. As a result of ultraclean processing, an incubation period of Si deposition only on $SiO_2$ was found, and low temperature epitaxy selective deposition on Si was achieved without addition of HCI. Total gas flow rate and deposition pressure were 16.6sccm and 3.5mtorr, respectively. In this condition, we selectively obtained high-quality epitaxial Si layers of the 350~1050$\AA$ thickness. In older to extend the selectivity, we kept high pressure $H_2$ environment without $Si_2H_6$ gas for few minutes after first incubation period and then we conformed the existence of second incubation period.

• 한국버섯학회지
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• 제1권1호
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• pp.34-43
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• 2003

느타리버섯 병재배 품종 다양화와 신품종 느타리버섯의 병재배기술 확립을 위해 춘추2호, 수한1호, 흑평의 배양온도별 적정 배양일수에 대한 연구 결과는 다음과 같다. 1. 춘추2호의 배양일수는 $23^{\circ}C$ 배양시 17일, $17^{\circ}C$에서 21일이었고 흑평은 $23^{\circ}C$와 $26^{\circ}C$ 배양시 17일, $17^{\circ}C$에서 22일이었으며, 수한은 22~23일로 배양온도간 비슷하였다. 2. 초발이 소요일수는 춘추2호와 흑평은 배양온도별로 4~5일 소요되었고 수한1호는 $17^{\circ}C$, $20^{\circ}C$, $23^{\circ}C$에서는 3일, $26^{\circ}C$에서는 5~6일이 소요되었다. 3. 자실체특성은 춘추2호의 경우 배양일수가 길수록 유효경수가 20~25개 정도로 많았고 수한1호는 배양일수가 짧을수록 유효경수가 많았다. 4. 춘추2호와 흑평 수량은 배양온도별로 배양기간이 길수록 높은 경향이었으나 수한1호는 배양기간이 길수록 감소하였다. 춘추2호와 흑평은 배양온도 $20{\sim}23^{\circ}C$에서 22~27일간, 수한1호는 $17{\sim}23^{\circ}C$에서 22~23일간 배양후 발이시켰을 때 수량이 가장 높았다.

• Journal of the Korean Data and Information Science Society
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• 제21권6호
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• pp.1237-1242
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• 2010

1993년에 한국에서 재출현한 삼일열 말라리아는 현재 매년 2000여명의 환자를 발생시키고 있는 전염병이다. 질병관리본부의 2006-2008년 환자 자료를 이용하여 장 단기 잠복기의 평균과 분산을 구하고, 각각을 감마분포 모델과 정규분포 모델과 비교 하였다. 말라리아 비위험지역 거주자 중 국내 말라리아 위험지역으로 30일 이내의 여행을 통해 감염된 환자를 대상으로 하였으며, 해외여행을 다녀왔거나 예방약을 복용한 사람은 제외하였다. 여행 기간의 중간 날짜를 모기에 물린 날로 가정하고, 발병일과의 차이를 계산하여 이를 잠복기로 추정하였다. 그 결과 단기잠복기와 장기잠복기의 두 가지 패턴이 나타났으며, 각각의 평균은 25.42일, 328.6일이었다. 장기잠복기를 대수정규분포 모델로 표현한 결과 추정된 평균은 5.78509, 표준편차는 0.140988 이었다.

• 한국양식학회지
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• 제20권3호
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• pp.194-198
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• 2007

Reproductive traits of Palaemon gravieri such as embryo size, number of embryo (fecundity), incubation period, larval development mode, larval development period, larval survival and larval growth were described and compared to analyze the correlation among those traits. Embryo volume is a primary factor determining other ensuing reproductive features. Egg volume was $0.042mm^3$ in the first developmental stage. Embryo volume in P. gravieri was comparatively small which is indicative of great number of embryo (y = 3.0161x + 0.0185 $R^2$ = 0.74 positive isometric relationship) and relatively long incubation period. Larvae survived from zoea 1 to post-larvae and it took 45 days at $22^{\circ}C$. Survival rate of the larvae was rather great in the early stage and thereafter steadily decreased. Daily growth rate of larvae in P. gravieri at $22^{\circ}C$ was 0.0195 mm on average. They grew steadily as time went by. Incubation period was between 10-14 days at $22^{\circ}C$. Larval development mode was almost complete planktotrophic. PNR (point of no return) appeared to be the third day on average. Survival rate of larvae without feeding declined rapidly between 3 and 4 days. Larval development period and stage frequency were 23-30 days and 11 stages which imply prolonged larval period and high mortality. The pattern of brood production followed fast successive parturial pattern. Most ovigerous female had mature ovary when they performed parturial molt soon after hatching (larval release).

• Asian-Australasian Journal of Animal Sciences
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• 제1권4호
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• pp.219-222
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• 1988

Degradation of deoxyribonucleic acid(DNA) and ribonucleic acid(RNA) by cell-free extract of mixed rumen protozoa of buffalo rumen was investigated. DNA was observed to be degraded rapidly during an initial incubation period of 2 hr with simultaneous appearance of degradation products. RNA on the other hand recorded a rapid degradation during an initial incubation period of 1 hr. RNA degradation products appeared upto an incubation period of 2 hr. DNA was observed to degrade into oligo- and mononucleotides. pyrimidine nucleosides, purine nucleoside adenosine and bases xanthine, hypoxanthine and thymine. Degradation products of RNA comprised of pyrimidine nucleosides, purine nucleoside, adenosine and bases xanthine, hypoxanthine and uracil besides oligo- and mononucleotides.

• 한국응용곤충학회지
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• 제22권4호
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• pp.287-292
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• 1983

수잉기에 지엽엽초내의 유수를 도열병균포자현탁액으로 주사접종후 목도열병병징발현시의 잠복기간을 구명하였다. 접종일로부터 병징발현시까지 $10.9\~15.1$일이 소요되었는데 병원균의 발아, 부착기형성, 침입, 감염이 일어나기까지의 소요일수 약 2일간을 감안할 때 목도열병의 잠복기간은 9일에서 13일 사이로 측정되었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1992년도 추계학술대회 논문집
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• pp.28-30
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• 1992

Long incubation period of W nucleation on the TiN glue layer is a serious problem in blanket W process. In this study we investigated the dependence of W nucleation and growth rate on the preparation method of the TiN film, deposition temperature, chemistry, $SiH_4/WF_6$ ratio and sputter etching, ion implantation, and $SiH_4$ flushing pre-treatments. Incubation periods of W nucleation and deposition rates of W growth on three different TiNs are in the order of TiN>RTP-TiN> annealed TiN and TiN${\leq}$RTP-TiN${\leq}$ annealed TiN, respectively. $\beta$-W is not found on TiN substrate even for high $SiH_4/WF_6$ ratio. Sputter etching pre-treatment increases incubation period of W nucleation, while it decreases deposition rate. $SiH_4$ flushing pre-treatment decreases incubation period, but it slightly decreases deposition rate.

• Environmental Analysis Health and Toxicology
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• 제26권
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• pp.1.1-1.6
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• 2011

Plasmodium vivax malaria has occurred annually in the Republic of Korea (ROK) since its re-emergence in 1993. P. vivax malaria in ROK has been strongly influenced by infected mosquitoes originating from the Democratic People's Republic of Korea. Korean P. vivax malaria has shown typical characteristics of unstable malaria transmitted only during the summer season, and displays short and long incubation periods. The changing pattern of the transmission period can be predicted by analyzing the seasonal characteristics of early primary attack cases with a short incubation period. Such cases began to gradually occur earlier in the 1990s after the re-emergence. Most of the malaria cases after mid-August are presumed to be early primary attack, short incubation period cases. Only primary transmission was possible until the early 2000s, whereas up to fourth or fifth transmission occurred in the mid-2000s. The results indicate that the length of transmission period has been gradually extending, which may be ascribed to a climate change-mediated temperature rise. Malaria and climate data should be integrated to analyze and predict the influence of climate change on malaria occurrence in ROK.