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흰쥐 삼차신경 척수감각핵의 미측소핵 세포의 전압의존성 소디움통로와 포타슘통로에 대한 전기생리학적 연구
천상우,최정희,김권수,유용묵,김종구,이동근 대한악안면성형재건외과학회 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.1
The caudal subnucleus of the spinal trigeminal nucleus (medullary dorsal horn ; MDH) receives direct inputs from unmyelinated and thinly myelinated, small diameter primary afferent fibers. Thus, the MDH is implicated in the processing of nociceptive information in the orofacial region. In this study, the types and characteristics of voltage-dependent ion currents were investigated in acutely isolated MDH neurons of postnatal rats by means of the whole cell patch clamp techniques. Coronal slice (400㎛) of the trigeminal caudal subnucleus region was sequentially treated with pronase 0.2㎎/㎖. then single neurons were mechanically dissociated. Voltage-dependent sodium currents showed that the half-maximum activation potential was -41.8±1.8mV and half-maximum inactivation potential was -62.4±3.0mV. And the currents were blocked totally by application of 100nM tetrodotoxin. In a Ca^2+ free solution, low-threshold transient (I_A) and high-threshold sustained (I_K) currents were recorded. The half-maximum activation and inactivation potential of I_K were 2.5±1.9mV and -37.1±2.3mV, respectively. I_A was activated and inactivated more rapidly than I_K. The half-maximum activation and inactivation potential were -21.6±6.3mV and -84.5±5.0mV, respectively. When a 4-aminopyridine of 5mM was applied, I_A was almost totally blocked. These results reveal that MDH neurons express a variety of voltage-dependent ionic currents with distinct physiological and pharmacological properties, and they play an essential role in the transmission and modulation of sensation, especially pain, from trigeminal region.
On the exact sequences of tensor products
Kwon, Tae-In,Kwon, Eun-Ouk 昌原大學校 基礎科學硏究所 1996 基礎科學硏究所論文集 Vol.8 No.-
단위원을 가지는 환 R 상의 모든 자유우가군 F 와 좌 R - 가군들의 모든 완전열 ?? 에 대하여 항등자기준동형사상을 가지는 tensor 곱의 열?? 또한 완전열임을 밝히려고 한다.
여수석유화학산단 산업폐수 재이용을 위한 블로우 다운 (Blow Down)수 발생현황 조사
권태옥 ( Tae Ouk Kwon ),문일식 ( Il Shik Moon ) 한국물환경학회 2005 한국물환경학회지 Vol.21 No.3
Purpose of this research is to quantitatively and qualitatively investigate the blow down wastewater produced from Yeosu Industrial Complex. Approximately, 38,325,000 tons/year of wastewater is produced, processed and finally discharged. Six representative companies, namely, A, B, C, D, E, F were chosen for this study. Each company produce over 5,000 tons/day of wastewater. In total, 6,844 tons/day of blow down water is produced from these six companies, put together. However, companies A and C produce about 24% and 37% of blow down water, respectively. It was found that the blow down water had favorable qualities, except for its high conductivity, ranging from 230 to 1,700 μs/㎝. It was evident that, this water can be suitable for reuse, for industrial purposes, if a suitable treatment, for example, RO membrane process is adopted to remove high conductivity.
Soon Il Kwon,Jun Seok Son,Young Ouk Kim,Chang Ho Chae,Ja Hyun Kim,Chan Woo Kim,Hyoung Ouk Park,Jun Ho Lee,Jun Ick Jung 대한직업환경의학회 2015 대한직업환경의학회지 Vol.27 No.-
Background: Vitamin D has been known to maintain the body’s balance of calcium and phosphorus as well as skeletal health. There has been increasing emphasis on the importance of vitamin D as recent studies have been reporting the specific functions of vitamin D in the cerebral nervous system and the association between the level of serum vitamin D and depressive symptoms. However, there is currently a paucity of research investigating the association between serum vitamin D and depressive symptoms in Korean subjects. Consequently, this study has aimed to determine the level of serum vitamin D and explore the association between serum vitamin D and depressive symptoms in Korean female workers. Method: A medical examination, questionnaire, anthropometric measurements, and a blood test were conducted between February 3 and March 7, 2014 in 1054 subjects among female workers in the manufacturing industry who underwent physical examinations in a university hospital. From this data, we identified the level of serum vitamin D and investigated the association between serum vitamin D deficiency and depressive symptoms. Results: The average serum vitamin D level of the 1054 subjects was 9.07 ± 3.25 ng/mL, and the number of subjects in the serum vitamin D deficiency group with less than 10 ng/mL was 721 (68.4 %). The odds ratio of the depressive symptom group with a CES-D score of 16 or above being in the deficiency group with a serum vitamin D level less than 10 ng/mL was found to be 1.55 (95 % CI = 1.15–2.07). Conclusion: 68.4 % of female workers in the manufacturing industry were in the deficiency group with serum vitamin D levels less than 10 ng/mL. Additionally, we identified an association between serum vitamin D deficiency and depressive symptoms. In the future, if serum vitamin D deficiency is checked regularly in workers, we expect to achieve better outcomes in managing their depressive symptoms.