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박규남,황주일,박조현,오동렬,이원재,오승택,김세경,김인철 대한응급의학회 1995 대한응급의학회지 Vol.6 No.2
The interactions between nutrition and the endocrine system are more intimate and complex that previously thought. Nutrition modulates secretion and activity of many hormones, as part of the stress adaptation process. Fasting, in particular, produces a number of important changes in the endocrine system, with teleological purpose of helping the body tolerate the lack of food ingestion. These changes are therefore beneficial and protective, although at times they may not appear to be that way. The endocrine changes of fasting mediate the metabolic response. We must emphasize that these changes are completely reversible when appropriate nutrition is established. These changes are as followes: 1) decreased insulin and increased glucagon levels, 2) decreased thyroid effect, 3) decreased sympathetic activity, 4) hypothalamic hypogonadism, 5) decreased growth, 6) altered glucocorticoid secretion and metabolism, 7) impaired mineralocorticoid response, 8) decreased ADH secretion and effect. We experienced three cases of involuntary prolonged fasting after collapse of Sampoong department store. They were released from collapsed field after 11(case Ⅰ), 13(case Ⅱ), 17days(case Ⅲ) respectively. In each case, the endocrine changes of plasma levels were as followes: decrease of cortisol in case Ⅰ, increase of GH in case Ⅱ, decrease of free T3, T3, cortisol and increase of reverse T3, insulin in case Ⅲ. Each one did not show the same endocrine changes of plasma levels. But we think these changes of fasting are beneficial in metabolic response of human.
심교문,이정택,윤성호,황규홍 한국농림기상학회 2000 한국농림기상학회지 Vol.2 No.3
The northward shift of the cultivation region of winter barley has been considered because of consecutive warm winters from the middle of 1980's. There was 1.02℃ rise in mean air temperature during winter barley cropping season from 1975 to 1998. During this period, the maximum air temperature affected the mean air temperature rise rather than the minimum air temperature. The amount of mean precipitation was 513.3mm during winter barley cropping season from 1975 to 1998 and was least in 1992. Sunshine hours has increased little by little in the all regions except rural regions. The air temperature during winter barley cropping season from 1987 to 1999 in which the winter was warm was higher than the normal air temperature(1961∼1990). On the other hand, the air temperature during winter barley cropping season from 1974 through 1986 was similar to the normal air temperature. The amount of mean precipitation during winter barley cropping season from 1987 through 1999 was similar to the normal precipitation except April. During this period, the amount of mean precipitation of April was lower by 26mm than the normal year(1961∼1990). Sunshine hours during winter barley cropping season from 1987 to 1999 decreased generally in comparison with a normal year. Considering the air temperature rise during wintering from 1987 to 1998, it might be possible to extend the cropping area of winter barley northward.
Synthesis of sulfonated polyketone membranes by a direct sulfonation reaction and their properties
Seong Yeon Hwang,Jae Bum An,Byoung Chul Park,Taekeun Kim,Taek-Sung Hwang 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.81 No.-
In this study, sulfonated polyketone cation exchange (SPOK) membranes were prepared by a directsulfonation method and evaluated according to the concentration of sulfonating agent, reaction time andreaction temperature. The physicochemical properties of these membranes were measured to confirmtheir optimal synthetic conditions. The sulfur content in the SPOK membranes increased with increasing sulfonating agent concentration,reaction time and reaction temperature. The ion exchange capacity, water uptake and swelling ratio ofthese membranes increased with increasing sulfur content. The highest ion exchange capacity for themembranes was 1.01 meq/g. From the measured electrical properties, the electrical resistance showed a tendency to decrease withincreasing sulfonation conversion, and the lowest electrical resistance was 0.4 V cm2 when thesulfonation conversion was 59.6%. To evaluate the possible application of the SPOK membranes tomembrane capacitive deionization (MCDI) modules, their chemical resistance, durability and tensilestrength were measured. The performance-limiting conditions for the tensile strength were 0.3 wt%chlorosulfonic acid (CSA)/CF, 20 C and 60 min.
Expression Levels of Plasma Angiogenic Factors during Early Pregnancy in Hanwoo
Bae, Seong-Hun,Yang, Byoung-Chul,Joo, Seok-Cheon,Min, Kwan-Sik,Yoon, Jong-Taek,Jin, Dong-Il,Kim, Tae-Hun,Seong, Hwan-Hoo,Hwang, Seong-Soo The Korean Society of Animal Reproduction 2008 Reproductive & developmental biology Vol.32 No.4
This study was conducted to compare the expression pattern of the specific factors associated with pregnancy and angiogenesis during early pregnancy in Hanwoo. Synchronized female Hanwoo ($4{\sim}6$ year-old) were inseminated artificially. After 10 weeks after artificial insemination (AI), the pregnancy was tested by rectal palpation method. Three pregnant and non-pregnant Hanwoo were used in this experiment, respectively. The plasma progesterone level was measured by ELISA. Western blot analysis was performed to detect the expression of pregnancy associated glycoprotein (PAG) or angiogenic factors (VEGF, B-FGF, ANP-1, and TIE-2). The plasma P4 level was increase gradually in pregnant group and maintained high level. The concentration of PAG was significantly higher from $5^{th}$ weeks in pregnant group compared to that of non-pregnant group (p<0.05). The concentrations of the VEGF (p<0.05), B-FGF (p<0.05), and ANP-1 (p<0.05) were significantly increased from $6^{th}\;or\;7^{th}$ week after AI in pregnant group, respectively. And the intensity of TIE-2, ANP-1 receptor, was well matched with ANP-1 (p<0.05). Taken together, it can be postulated that the blood vessels connected with fetus and dam were formed dramatically around 40 days after AI, because the expression levels of the angiogenic factors were increased significantly from this time in pregnant Hanwoo.
( Seong Hee Kim ),( Chan Hee Jin ),( In Taek Hwang ),( Jun Sook Park ),( Jung Hwan Shin ),( Dae Woon Kim ),( Yong Soo Seo ),( Jee Nah Sohn ),( Yun Seok Yang ) 대한산부인과학회 2018 Obstetrics & Gynecology Science Vol.61 No.2
Objective The present study aimed to determine the differences in outcomes between natural orifice transluminal endoscopic surgery-assisted vaginal hysterectomy (NAVH) and conventional laparoscopy-assisted vaginal hysterectomy (LAVH). Methods We retrospectively reviewed the charts of patients who between July 2012 and September 2015, were diagnosed as having benign uterine disease such as uterine myoma, endometriosis, or adenomyosis and managed via NAVH or LAVH in a single-center (Eulji University Hospital). Data such as age, body weight, height, parity, operation time, intra/ post-operative complications, and uterus weight were obtained from the clinical charts. NAVH and LAVH recipients were matched 1:3 in terms of baseline characteristics, and the 2 groups were compared regarding surgical outcomes. Results Of the 160 patients with benign uterine disease included in the present study. Forty received NAVH and remaining 120 received LAVH. There were significant differences between the groups regarding operation time and hemoglobin change. Notably, although the operation time was shorter for LAVH, hemoglobin change was lower for NAVH. Additionally, although maximum hospitalization duration was shorter for LAVH, the average length of hospitalization was similar between NAVH and LAVH. There were no significant differences between the groups in terms of other variables. Conclusion NAVH may become a new alternative surgical method of choice for hysterectomy, as it represents a clinically feasible and safe approach; moreover is superior to LAVH in terms of bleeding loss.
Hwang, Eu Chang,Yu, Seong Hyeon,Jo, Yang Hyun,Jung, Seung Il,Kang, Taek Won,Kwon, Dong Deuk,Choi, Chan,Heo, Suk Hee,Hwang, Jun Eul,Jung, Sung-Hoon,Jung, Tae-Young Medknow PublicationsMedia Pvt Ltd 2016 ASIAN JOURNAL OF ANDROLOGY Vol.18 No.1
<P>Several studies have revealed that the preoperative serum testosterone and percent tumor volume (PTV) predict extra-prostatic extension (EPE) and biochemical recurrence (BCR) after radical prostatectomy. This study investigated the prognostic significance of serum testosterone and PTV in relation to EPE and BCR after laparoscopic radical prostatectomy (LRP). We reviewed 520 patients who underwent LRP between 2004 and 2012. PTV was determined as the sum of all visually estimated tumor foci in every section. BCR was defined as two consecutive increases in the postoperative prostate-specific antigen (PSA) >0.2 ng ml<SUP>−1</SUP>. The threshold for serum total testosterone was 3.0 ng ml<SUP>−1</SUP>. Multivariate logistic regression was used to define the effect of variables on the risk of EPE and BCR. A low serum testosterone (<3.0 ng ml<SUP>−1</SUP>) was associated with a high serum PSA, Gleason score, positive core percentage of the prostate biopsy, PTV, and all pathological variables. On multivariate analysis, similar to previous studies, the serum PSA, biopsy positive core percentage, Gleason score, and pathological variables predicted EPE and BCR. In addition, low serum testosterone (<3.0 ng ml<SUP>−1</SUP>, adjusted OR, 8.52; 95% CI, 5.04–14.4, <I>P</I> = 0.001) predicted EPE and PTV (adjusted OR, 1.02; 95% CI, 1.01–1.05, <I>P</I> = 0.046) predicted BCR. In addition to previous predictors of EPE and BCR, low serum testosterone and PTV are valuable predictors of EPE and BCR after LRP.</P>
Hwang, Jin-Taek,Kim, Young Min,Surh, Young-Joon,Baik, Haing Woon,Lee, Seong-Kyu,Ha, Joohun,Park, Ock Jin American Association for Cancer Research 2006 Cancer Research Vol.66 No.20
<P>Epidemiologic and experimental evidences indicate that selenium, an essential trace element, can reduce the risk of a variety of cancers. Protection against certain types of cancers, particularly colorectal cancers, is closely associated with pathways involving cyclooxygenase-2 (COX-2). We found that AMP-activated protein kinase (AMPK), which functions as a cellular energy sensor, mediates critical anticancer effects of selenium via a COX-2/prostaglandin E(2) signaling pathway. Selenium activated AMPK in tumor xenografts as well as in colon cancer cell lines, and this activation seemed to be essential to the decrease in COX-2 expressions. Transduction with dominant-negative AMPK into colon cancer cells or application of cox-2(-/-)-negative cells supported the evidence that AMPK is an upstream signal of COX-2 and inhibits cell proliferation. In HT-29 colon cancer cells, carcinogenic agent 12-O-tetradecanoylphorbol-13-acetate (TPA) activated extracellular signal-regulated kinase (ERK) that led to COX-2 expression and selenium blocked the TPA-induced ERK and COX-2 activation via AMPK. We also showed the role of a reactive oxygen species as an AMPK activation signal in selenium-treated cells. We propose that AMPK is a novel and critical regulatory component in selenium-induced cancer cell death, further implying AMPK as a prime target of tumorigenesis.</P>