• 대한불안의학회지
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• 제8권2호
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• pp.93-98
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• 2012

Objective : Cortisol, a product of hypothalamus-pituitary-adrenal axis (HPA axis), is one of our defensive mechanisms in response to stress. The level of cortisol in the saliva is a major biomarker of the stress response by HPA axis and shows diurnal variation. We measured salivary cortisol level and its diurnal variation to compare the pattern of changes by degree of burn and Clinician-Administered PTSD Scale (CAPS) score. Methods : We measured the salivary cortisol levels of 37 subjects hospitalized in the burn center at our facility from March to June 2012. Salivary cortisol levels were measured at 6 : 00 AM and at 7 : 00 PM. All subjects were tested for CAPS to evaluate the severity of posttraumatic stress disorder and the Hamilton Depression Rating Scale to evaluate and to control the coexisting depression. Results : Factorial ANOVA test revealed that there was a statistically significant difference in terms of the effect of the interaction between the degree of burn and the patient's CAPS score. Unlike the mild burn group, in the severe burn group, the patients who had a low CAPS score didn't show a normal diurnal variation and the patients who had a high CAPS score showed the normal diurnal variation. After a few months follow up, we found a greater degree of psychiatric complications in severe burn patients that had a lower cortisol stress response. Conclusion : We suppose that the disappearance of the stress response changes in salivary cortisol seen in the severe burn group may be caused by an impaired stress response. Through followed observation of the subjects, this disruption of cortisol response may cause psychiatric problems afterwards.

• 한국농림기상학회지
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• 제26권3호
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• pp.199-207
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• 2024

농업생태계, 특히 논에서의 메탄 배출량 추정을 위해 가스크로마토그래피를 이용한 폐쇄형 챔버법은 주로 사용되고 있는 방법이다. 본 연구에서는 폐쇄형 챔버법을 효과적으로 사용하기 위한 합리적인 메탄 포집시간을 찾는데 기여하고자 하루 동안 2시간 간격으로 관측을 수행하고 그 모든 자료를 공개하였다. 6월부터 9월까지의 벼 재배 기간 동안 총 4회에 걸쳐 메탄 배출의 일 변화를 관측한 결과, 오전(8:00~12:00)과 늦은 오후(16:00~20:00)의 메탄 배출량이 하루 동안 관측한 값의 평균으로 나타났다. 향후 불연속적인 관측의 한계를 가지는 가스크로마토그래피를 이용한 폐쇄형 챔버법의 단점을 보완하고자 연속 관측이 가능한 에디공분산 미기상법과 같이 비교하여 신뢰도 높은 관측값을 얻는 연구가 필요할 것으로 사료된다.

• 한국데이터정보과학회:학술대회논문집
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• 한국데이터정보과학회 2003년도 추계학술대회
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• pp.75-92
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• 2003

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2008년도 춘계학술대회 논문집
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• pp.386-388
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• 2008

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2007년도 추계학술대회 논문집
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• pp.362-363
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• 2007

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 1999년도 춘계학술대회 논문집
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• pp.216-217
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• 1999

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2006년도 학술발표회 발표논문집
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• pp.419-420
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• 2006

• 천문학회보
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• 제34권1호
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• pp.87-87
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• 2009

• 한국동물학회:학술대회논문집
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• 한국동물학회 1999년도 한국생물과학협회 학술발표대회
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• pp.178.2-178
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• 1999

No Abstract, See Full Text

• Environmental Sciences Bulletin of The Korean Environmental Sciences Society
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• 제2권2호
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• pp.109-114
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• 1998

The induction of crassulacean acid metabolism(CAM) characterized by day/night acid fluctuation was investigated in leaves from 10 days exposure to elevated $CO_2$ concentration(1,000 ${\mu}L\;L^{-1}CO_2).$ For Pereskia aculeata, have $C_3-like$ gas exchange pattern in well watered condition and shift into CAM-like in water stress, showed a more typical CAM-like diurnal acid fluctuation. Whereas the massive diurnal fluctuation of acidity in typical CAM of Kalanchoe rosea was declined. The effect of short-term exposure to various concentrations of $CO_2$ on titratable acidity in P. aculeata and K. rosea was also investigated. To investigate the response of various $CO_2$ concentrations, four different $CO_2$ levels(350, 700, 1,000 and 1,500 ${\mu}L\;L^{-1})$ were imposed for 24hr and measured the titratable acidity at 06:00, when the acidity was maximum, and 14:00, when the acidity was minimum. The accumulation of acid in P. aculeata was enhanced markedly by higher concentration of $CO_2,$ while the level of acidity in f rosea did not highly respond to $CO_2.$ A notable difference between P. aculeata and K. rosea was the response of de-acidification to a higher concentration of $CO_2$ Increasing with $CO_2,$ the degree of do-acidification of P. auleata was increased while that of K. rosea was depressed.