• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.222-222
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• 2022

Improving the taste of rice in the breeding process is one of the important goals. However, it takes a lot of time and effort to select lines with good grain quality. MAS related to rice quality can help quickly and accurately select the elite lines in breeding programs. QTL qTV9, derived from Wandoaengmi 6, has been reported as a marker associated with improved glossiness of rice (Park et al., 2019). To confirm the function of QTL qTV9, 186 RILs derived from Hwayeong/Wandoaengmi6 were cultivated on ordinary planting cultivation for five years. The average DTH of Hwayeong and Wandoaengmi 6 was not significant at 99 and 97 days, respectively, but the averages of TV (toyo value) were 72.6 and 86.0, respectively. The DTH and TV of RIL vary from year to year. In 2017-2018, the average DTH was 98 days, which was significantly higher than the other three years. In 2018 and 2021, the average TV was 79.5 and 86.5, respectively, which were significantly higher than in other years. As a result of correlation analysis, DTH in the different years showed highly significant positive correlations (r = 0.71-0.92) from 0.71 to 0.92, whereas TV showed positive but weaker correlations (r = 0.42-0.71). The correlation between DTH and TV in each year was significant but weak (r = 0.25-0.64) and there was no correlation in 2017. The TV (77.6-88.7) of RILs with QTL qTV9 was significantly higher than that of RILs without qTV9 (72.6-84.9) for all five years. As a result of analyzing TV by DTH group, the TV of the lines with qTV9 in DTH groups (93-97) and (98-103) showed a significantly higher trend for all 5 years. And TV was not significant in DTH groups A, B, E, and F. This may have been influenced by factors such as insufficient populations between groups or differences in harvest timing. This study is expected to be used as data for improving the glossiness of cooked rice in breeding programs, and further study of the QTL qTV9 marker is required.

• 대한수학회보
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• 제46권6호
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• pp.1151-1152
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• 2009

In this short notice, we prove a new result about the dth power residue symbol of function fields, by modifying the method of W. Kohnen in the paper published in Bull. Korean Math. Soc. 45 (2008), no. 2, 273-275.

• Journal of Microbiology and Biotechnology
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• 제29권12호
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• pp.1882-1893
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• 2019

β-Glucosidases and β-xylosidases are two categories of enzymes that could cleave out non-reducing, terminal β-D-glucosyl and β-D-xylosyl residues with release of D-glucose and D-xylose, respectively. In this paper, two functional β-glucosidase Dth3 and β-xylosidase Xln-DT from Dictyoglomus thermophilum were heterologously expressed in E.coli BL21 (DE3). Dth3 and Xln-DT were relatively stable at 75℃ and were tolerant or even stimulated by glucose and xylose. Dth3 was highly tolerant to glucose with a K_i value of approximately 3 M. Meanwhile, it was not affected by xylose in high concentration. The activity of Xln-DT was stimulated 2.13-fold by 1 M glucose and 1.29-fold by 0.3 M xylose, respectively. Furthermore, the βglucosidase Dth3 and β-xylosidase Xln-DT showed excellent selectivity to cleave the outer C-6 and C-3 sugar moieties of ASI, which established an effective and green method to produce the more pharmacologically active CAG, an exclusive telomerase activator. We measured temperature, pH and dosage of enzyme using a single-factor experiment in ASI biotransformation. After optimization, the optimal reaction conditions were as follows: 75℃, pH 5.5, 1 U of Dth3 and 0.2 U of Xln-DT, respectively. Under the optimized conditions, 1 g/l ASI was transformed into 0.63 g/l CAG with a corresponding molar conversion of 94.5% within 3 h. This is the first report to use the purified thermostable and sugar-tolerant enzymes from Dictyoglomus thermophilum to hydrolyze ASI synergistically, which provides a specific, environment-friendly and cost-effective way to produce CAG.

• 대한미생물학회지
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• 제16권1호
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• pp.49-55
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• 1981

최근(最近) 히스타민이 면역반응(免疫反應)을 조절(調節)함이 구명(究明)되고 있으나 생체내(生體內) 실험(實驗) 특(特)히 마우스에서의 연구보고(硏究報告)를 희소(稀少)하다. 본(本) 실험(實驗)에서는 histamine-2-receptor antagonist($H_2$ 차단제(遮斷劑))인 cimetidine과 히스타민이 마우스의 면양적혈구(緬羊赤血球)(SRBC)에 대(對)한 면역반응(免疫反應)에 미치는 영향(影響)을 실험(實驗)하였다. 마우스를 매일(每日) 14일간(日間) 여러가지 농도(濃度)의 cimetidine 으로 전처리(前處理)하고 여러가지 농도(濃度)의 SRBC($10^6,\;10^7$ 및 $10^8$ 세포(細胞))로 면역(免疫)하고 4일(日) 후(後)에 마우스 족척(足蹠)에 SRBC로 야기주사(惹起注射)하여 Arthus반응(反應)과 지연성과민반응(遲延性過敏反應)(DTH)를 족척종창반응(足蹠腫脹反應)으로 측정(測定)하였으며, 체액성면역반응(體液性免疫反應)은 적혈구응집소가(赤血球凝集素價)를 측정(測定)하였다. 수(數) 종(種) 농도(濃度)($10^{-1}M,\;10^{-3}M$, 및 $10^{-5}M$)의 히스타민을 야기주사(惹起注射)와 동시(同時)에 주사(注射)하여 24시간(時間)-DTH를 측정(測定)하여 히스타민 효과(效果)를 평가(評價)하였다. Cimetidine은 DTH를 항진(亢進)시켰으며 그 항진(亢進)은 250 ${\mu}g$의 cimetidine을 투여(投與)하였을 때 현저(顯著)하였다. 그러나 Arthus 반응(反應)과 혈청항체가(血淸抗體價)는 cimetidine 전처리(前處理) 군(群)과 대조군간(對照群間)에 유의(有意)한 차이(差異)가 없었다. 히스타민은 SRBC에 대(對)한 DTH를 투여량-의존성(投與量-依存性) 유형(類型)으로 억제(抑側)하였으며 그 억제(抑制)는 저농도(低濃度)의 항원량(抗原量)($10^6$ 및 $10^7$ SRBC)일때 더 현저(顯著)하였다. 그러나 외인성(外因性) 히스타민은 $10^8$ SRBC로 면역(免疫)하였을 때늘 DTH를 감소(滅少)시키지 않았다. 이상(以上)의 본(本) 실험결과(實驗結果)는 cimetidine이 세포성(細胞性) 면역반응(免疫反應)을 항진(亢進)시키나 체액성(體液性) 면역반응(免疫反應)은 증가(增加)시키지 않으며 내인성(內因性) 및 외인성(外因性) 히스타민 즉시형과민반응(卽時型過敏反應)뿐만 아니라 세포성(細胞性) 면역반응(免疫反應) 조절(調節)에 관여(關與)함을 강력(强力)히 시사(示唆)하는 증거(證據)라고 사료(思料)되었다.

• 대한한의학회지
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• 제22권1호
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• pp.46-52
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• 2001

Objectives: This experimental study was carried out to evaluate the effects of PSM(polysaccharide of mushroom) on the immune activity. Methods: The following were performed; Immunotoxicity testing for immunopathology, IgO production & LPS mitogen response for humoral immunity, DTH, ConA mitogen response for cell-mediated immunity, and macrophage adherence & phagocytosis for nonspecific immunity in vitro or in vivo. Results: PSM showed a protective effect on cyclophosphamide-induced leukopenia, increased IgG production and lymphoproliferative responses to LPS; inhanced DTH and lymphoproliferative response Con A; and activated macrophage adherence and phagocytosis to SRBC. Conclusions: It is suggested that PSM can be used for cancer patients with immunosuppression and adapted to many other diseases.

• Environmental Analysis Health and Toxicology
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• 제6권1_2호
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• pp.25-38
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• 1991

The immunopotenciating effects of petroleum ether extract, ethanol extract and butanol fraction of panax ginseng on the immunotoxicity of Cimetidine were investigated in ICR mice. Immune responses were evaluated by antibody production, Arthus reaction, delayed type hypersensitivity (DTH), and rosette forming cell (RFC) in mice, sensitized and challenged with sheep red blood cells. To investigate the change of the non-specific immune responses, phagocyte activity and number of leukocytes in peripheral blood were measured also. The results of this study are summarized as followings; 1. Cimetidine treated group as compared with normal group generally decreased HA, 2-MER, RFC, number of circulating leukocytes and phagocyte activity whereas in-creased Arthus reaction and DTH. 2. The panax ginseng petroleum ether extract combined administration group as compared with the control group remarkably increased HA, 2-MER, number of circulating leukocytes and phagocyte activity. 3. The panax ginseng ethanol extract combined administration group as compared with the control group remarkably increased Arthus reaction, DTH, HA, RFC, number of circulating leukocytes and phagocyte activity. 4. The panax ginseng butanol fraction combined administration group as compared with the control group remarkably increased Arthus reaction, HA, 2-MER, RFC, number of circulating leukocytes and phagocyte activity.

• Environmental Analysis Health and Toxicology
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• 제6권1_2호
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• pp.59-70
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• 1991

This study was performed to investigate the effect of olive oil diet on the immune response in ICR male mice. Experimental diets of 4 groups were fed ad libitum to the ICR male mice for 27 days. The results of this study were summarized as followings: 1. 10% Olive oil diet group as compared with the control diet group significantly decreased liver weight rate but significantly increased hemagglutination titer (HA), Arthus reaction, delayed type reaction (DTH), rosette forming cell (RFC), and phagocyte activity. 2. 20% Olive oil hypersensitivity diet group as compared with the control diet group significantly increased body weight gain, liver weight rate, and HA but significantly decreased Arthus reaction, DTH, RFC, phagocyte activity, and peripheral circulating white blood cell (WBC). 3. 30% Olive oil diet group as compared with the control diet group significantly increased liver weight rate but significantly decreased body weight gain, Arthus reaction, plaque forming cell (PFC), DTH, RFC, phagocyte activity, and WBC. The results showed that the increase of olive oil doses significantly decreased humoral and cellular immune responses, phagocyte activity, and WBC.

• Environmental Analysis Health and Toxicology
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• 제5권3_4호
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• pp.37-45
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• 1990

Experiments were performed on mice to investigate the influences of cimetidine, ranitidine and famotidine on the immune response. Immune response were evaluated by antibody, Arthus reaction (Arthus), delayed type hypersensitivity (DTH), rosette forming cell (RFC), phagocyte activity and whit( blood cell (WBC) in mice, sensitized and challenged with sheep red blood cells (SRBC). The weight of liver, spleen and thymus were measured. Following results obtained in this experiment. 1) The administration of cimetidine as compared to normal group significantly decreased Arthus, Hemagglutinin titer (HA), RFC, DTH, WBC and phagocyte activity, but increased the activity of serum albumin. 2) The administration of ranitidine as compared to normal group decreased RFC and HA. 3) The administration of Famotidine as compared to normal group decreased DTH and RFC, and significantly decreased HA, Arthus and serum protein. 4) The administration of ranitidine and famotidine decreased more humoral immune response than cellular immune response, but the administration of cimetidine significantly decreased humoral and cellular immune response, WBC and phagocyte activity.

• IMMUNE NETWORK
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• 제6권4호
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• pp.185-191
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• 2006

Background: Based on outstanding progresses in animal experiments, vaccines for some human tumors have been developed. However, clinical effects of these vaccines have been far below than expected. This discrepancy might come from differences between animal models and human patients with respect to immunocompetency. The immune status of mice after tumor inoculation has not been well studied, which make us cautious in interpreting and applying the results from mice to human. We evaluated cell-mediated immune responses in mice after tumor cell inoculation. Methods: Mice were inoculated with TA3Ha, CT26, or 4T1. Delayed-type hypersensitivity (DTH) responses were induced 2-4 weeks after inoculation using 2,4-dinitro-1-fluorobenzene as an antigen. The relationships between the severity of DTH responses and the duration of tumor inoculation or the size of tumor mass were analyzed. Results: In T A3Ha groups, DTH response was elevated 2 weeks after inoculation, but depressed after 4 weeks, compared to the control group. When analyzed based on the sizes of tumor masses elicited, DTH responses were inversely related to the mass size, especially in those greater than 10 mm in diameter. In CT26 groups, while the duration after inoculation did not affect the severity of DTH responses, those with large mass showed depressed responses regardless the duration of inoculation. 4T1 cells grew so slowly that the size of tumor mass was small even 4 weeks after inoculation, and this group showed much higher DTH responses compared to that of tumor-free group. Conclusion: At least in an experimental setting where tumor model was induced by inoculating tumor cell lines into immunologically competent mice, the host immune response was elevated in early stage, and then depressed in late stage when the mass grew over a critical size.

• 디지털융복합연구
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• 제15권10호
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• pp.551-557
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• 2017

헤어(Hair)의 연출은 현대인의 개성 창출을 위한 요소로 작용하고 있으나 염색(Dye), 펌(Prem) 등과 같은 반복적인 화학 시술은 모발 손상을 초래하게 된다. 손상을 줄이기 위한 화학 시술 방법으로 헤어 트리트먼트(hair treatment)에 대한 중요성이 크게 부각되고 있다. 따라서 본 연구에서는 염색 시, 헤어 트리트먼트의 사용이 실제 모발의 형태학적 손상도와 모발 내의 유독성 미네랄과 필수 미네랄의 수치에 어떠한 영향을 미치는지를 확인하기 위해, 20대 전 후반 5명의 모발(normal hair, NH)을 채취하여 염색 전 모발(NH), 염색 모발(dye hair, DH), 염색제와 헤어 트리트먼트 혼합 모발(dye with treatment hair, DTH)의 형태학적 손상도를 관찰하였으며, 모발 속 중금속 및 미네랄(mineral) 함량분석을 통하여 염모제와 헤어 트리트먼트에 의한 모발 내 중금속 변화를 조사하였다. 모발의 형태학적 영향은 DTH 모발에서 DH나 NH에 비하여 큐티클 형태의 배열이 대체적으로 균일하게 보여 지며, 들뜸이 차분해지고 선이 매끄럽게 관찰 되어 손상도가 적게 관찰되었다. 미네랄 함량의 농도 부분에서는 대체적으로 균형범위에 있었으나 유독성 미네랄 부분에서는 바륨(Ba), 영양미네랄 부분에서는 Na, Ca, Mg의 농도가 NH모발, DH모발, DTH모발에서 균형범위보다 높게 나타났다.