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        • 발기부전 환자의 감별 진단에 대한 Rigiscan^ⓡ 검사의 의의

          강상재,최성협 인제대학교 1990 仁濟醫學 Vol.11 No.2

          성기능장애를 진단하는데 있어서 종래의 진단법들과는 달리 야간 음경발기와 강직도를 동시에 측정할 수 있는 RigiscanR을 이용하여 임상적 응용의 효율성을 살펴 보았다. We studied 30 male patients complaining of impotence. Underlying causes were psycogenic (12 paients) and injuries (18 patients). Rigiscan is preferred than other diagnostic tools of impotence to differentiate psycogenic from organic impotence due to continuous and simultaneous recording of nocturnal penile rigidity and tumescence. The results obtained were as follows : 1.In 21 patients shown normal rigiscan, the number of erection was 1.86±0.91 times per night, duration was 12.39±6.41 minutes at tip and 17.03±8.95 minutes at base, tumescence change was 2.86±0.73cm at tip and 2.90±0.68cm at base, rigidity was 66.90±17.08% at tip and 87.85±13.31% at base. 2.In 9 patients shown abnormal rigiscan, the number of erection was 0 per night, duration was 0.92±1.64 minutes at tip and 2.43±3.59 minutes at base. tumescence change was 1.46±0.78cm at tip and 1.69±0.79cm at base, rigidity was 8.26±15.64% at tip and 24.68±30.21% at base. 3.Normal rigiscan showed in 21 patients (11 of psychogenic, 10 of injured patient) but quality of normal event, duration and rigidity were poor.

        • KCI등재

          The Effects of Phosphate Starvation on the Activities of Acid and Alkaline Phosphatase, Fructose-1,6-bisphosphatase, Sucrose-phosphate Synthase and Nitrate Reductase in Melon (Cucumis melo L.) Seedlings

          강상재,이창희,박만 한국토양비료학회 2016 한국토양비료학회지 Vol.50 No.4

          Plants response to phosphate starvation include the changes of activity of some enzymes, such as phosphatases, fructose-1,6-bisphosphatase, sucrose-phosphate synthase and nitrate reductase. In this study, to determine the effects of phosphate starvation on the change of activities of acid and alkaline phosphatase, fructose-1,6-bisphosphatase, sucrose-phosphate synthase, and nitrate reductase were studied in melon seedlings (Cucumis melo L.). The content of the protein and chlorophyll tended to relatively reduced in melon seedlings subjected to phosphate starvation. Acid phosphatase activity in first and second leaves of melon seedlings was relatively higher than that of third and fourth leaves of seedlings in 14 days after phosphate starvation treatment, respectively. Active native-PAGE band patterns of acid phosphatase in melon leaves showed similar to activities of acid phosphatase, whereas alkaline phosphatase activity was different from the change in the activity of acid phosphatase. Inorganic phosphate content in melon seedlings leaves was constant. The changes of Fructose-1,6-bisphosphatase and sucrose phosphate synthase activities showed similar patterns in melon seedlings leaves, and between these enzymes activities and phosphate nutrition negatively related. Fructose-1,6- bisphosphatase and sucrose phosphate synthase activities showed significant difference in second and fourth leaves, but nitrate reductase showed significant difference in first and second leaves in 14days after phosphate starvation treatment. We concluded that phosphate nutrition could affect the distribution of phosphate, carbon and nitrogen in melon seedlings.

        • 大豆組織培養細胞 : Rhizobium에 依한 窒素固定力 Rhizobium Association through Tissue Culture Technique in Soybean

          姜相載,朴愚喆 慶北大農學誌編輯委員 1986 慶北大農學誌 Vol.4 No.-

          Rhizobium의 Nitrogenase 生成要因과 感染機作을 究明하고 培養細胞와 Rhizobia의 混合培養에서 窒養固定係를 確立하기 爲하여 黃金, 南川, D68-0099等 세 品種을 組織培養한 結果는 다음과 같다. Callus 形成能은 胚와 幼根에서는 良好하나 胚軸에서는 전혀 없었으며 2㎎/ℓ 2, 4-D, 4㎎/ℓ NAA에서 가장 良好하고 2, 4-D/Kinetin 組合濃度에서는 0.2㎎(2,4-D)/ℓ 과 0.05㎎(Kinetin)/ℓ에서 가장 理想的이었다. 培養細胞의 成長에는 2,4-D 2㎎/ℓ와 2,4-D(0.2㎎/ℓ)/Kinetin(0.05㎎/ℓ)일 때가 가장 良好하며 R. japonicum 019, 011을 接種하였을때 培養細胞의 成長은 상당히 둔화되었다. 單一 아미노산은 培養細胞의 成長을 沮害 하였는데 黃金의 경우 Methionine, Leucine에서 沮害가 가장 컷으며 다른 아미노산의 添加로 沮害作用이 상당히 회복되었다. 不定根의 生成은 2, 4 -D 2.0㎎/ℓ 에서나 0.2㎎/ℓ 2, 4-D/0.05㎎/ℓ Kinetin에서 良好하였다. 培養細胞-Rhizobium의 親和에 依한 窒養固定力은 25個 使用 菌株中에서 黃金에서는 10個 菌株, 南川에서는 7個 菌株에서 나타났으며 D68-0099에서는 전혀 나타나지 않았으며 黃金의 境遇 85-HG-1 019, 007, 南川에서는 007, 119等이 높은 活性을 나타내었다. This experiment was carried out to elucidate the factor of nitrogenase formation and to establish the nitrogen fixation system in mixed culture of cultured cells and rhizobia through tissue culture technique using three soybean varieties, Hwangkeum, Namcheon and D 68-0099 as host plants. The results obtained were as follows; The callus was induced in embryo and radicle, but not in hypocotyl. The most favorable callus induction was caused by the individual application of 2, 4-D and NAA at the concentration of 2㎎/1 and 4㎎/1, respectively, but in case of treating both 2, 4-D and kinetin, that was done at the concentration of 0.2㎎(2, 4-D)/0.05㎎(kinetin)per liter. The growth of cultured cell was good at the concentration of 2.0㎎(2, 4-D)/1 and 0.2㎎(2, 4-D)/0.05㎎(kinetin)per liter. When cultured cells were inoculated with R. japonicum 019 and 011, their growthes were considerably inhibited. The addition of single amino acid inhibited the growth of cultured cells. Hwangkeum was inhibited considerably by methionine and leucine. The inhibition of growth by single amino acid can be abolished by the addition of certain amino acids. The differentiation of adventitious root was good at the concentration of 2.0㎎ 2, 4-D and 0.2㎎ 2, 4-D/0.05㎎ kinetin per liter. Of three host plants tested with 25 R. japonicum strains, Hwangkeum had affinity for 10 strains, Namcheon for 7 strains and D68-0099 for none. The nitrogen fixing abilities of Hwangkeum and Namcheon caused by cultured cell-Rhizobium association were high in strain 019, 007, and in 007 mixed with 119, respectively.

        • KCI등재SCOPUS
        • 상추에서 수분 스트레스에 의한 항산화(抗酸化) 효소(酵素)의 활성도(活性度) 변화(變化)

          강상재,박우철,Kang, Sang-Jae,Park, Woo-Churl 경북대학교 농업과학기술연구소 1997 慶北大農學誌 Vol.15 No.-

          4종(種)의 상치를 공시작물(供試作物)로 하여 수분(水分) 스트레스에 노출(露出)을 시켰을 때 총(總) 단백질(蛋白質)의 함량(含量)은 Flooding 처리시 그 감소율(減少率)이 더 크게 나타났으며 감소율(減少率)은 JCM이 가장 컸고, DCM이 가장 작았으며 품종간(品種間) 각 처리별(處理別) 차이(差異)가 크게나타났다. 총(總) 지질(脂質)의 함량(含量)은 감소율(減少率)이 CCM이 가장 컸고 JCM, DCM, DJM순(順)으로 감소(減少)하였다. 항산화효소(抗酸化酵素)인 Superoxide Dismutase(SOD)는 Catalase, Ascorbate Peroxidase의 활성도(活性度)는 전체적으로 감소(減少)하였으며 그 감소율(減少率)은 Catalase의 경우 처리별 JCM이 가장 크게 나타났고 DCM, DJM에서는 Flooding 처리시 효소의 활성도 변화가 더 크게 나타났다. Calatase의 활성도(活性度) 변화(變化)가 Ascorbate peroxidase의 활성도(活性度) 보다 감소율(減少率)이 더 크게 나타나 이는 Catalase가 Ascorbate peroxidase 보다 과산화수소(過酸化水素)와 더 직접적(直接的)으로 반응(反應)을 함을 나타낸다. Drought 처리기간별(處理期間別) 효소(酵素)의 활성도(活性度)는 생육시간(生育時間)이 길어질수록 감소(減少)하는 경향(傾向)이었으며 Catalase의 활성도(活性度)가 4일째 이후 가장 급격하게 감소(減少)하였다. Plants are exposed to wide range of different stresses. As plants have only limited mechanism for stress avoidance, they require flexible means for adaption to changing environmental conditions. This study was carried out to reasearch the changes of antioxidant enzymes activities as caused by water stress in four lettuceUactuca sativa) lines. Four lettuce lines exposed to water stress showed premature senescence as evidenced by the consistenent reduction in the content of total soluble protein and total lipid. Water stress also caused decreased activities of superoxide dismutase, catalase, ascorbate peroxidase, but decrease rates were different. Catalase activity was decreased much more than that of ascorbate peroxidase that suggest catalase reacted with hydrogenyperoxide directly not with ascorbate peroxidase.

        • KCI등재

          저온 처리한 상추 잎에서 monodehydroascorbate 환원효소의 반응

          강상재,Kang, Sang-Jae 한국생명과학회 2011 생명과학회지 Vol.21 No.3

          The relationship between MDHA reductase activity and ascorbate, dehydroascorbate, and hydrogen peroxide content was evaluated, and this experiment was conducted to determine the change of MDHA reductase activity and the level of steady-state mRNA abundance of MDHA reductase in lettuce leaves subjected to low temperature stress. MDHA reductase activity of chloroplastic and cytosolic fraction in lettuce leaves subjected to $4^{\circ}C$ for 24 hr increased, followed by a steady decrease during the duration of recovery to $20^{\circ}C$ for 48 hr. The content of ascorbate slowly increased during low temperature treatment, followed by a rapid increase during the duration of recovery to $20^{\circ}C$ for 48 hr, while dehydroascorbate content rapidly decreased. The relationship between MDHA reductase activity of chloroplastic and cytosolic fraction in lettuce leaves subjected to $4^{\circ}C$ and ascorbate content correlated positively ($R^2$=0.9240, 0.9108, respectively), but MDHA reductase activity of chloroplastic and cytosolic fraction and dehydroascorbate were reversely correlated ($R^2$=0.8638, 0.8980, respectively). Hydrogen peroxide content and MDHA reductase activity of chloroplastic and cytosolic fraction in lettuce leaves subjected to $4^{\circ}C$ correlated positively ($R^2$=0.9443, 0.9647, respectively). Northern blot analysis showed that the level of mRNA transcript of MDHA reductase was similar to total activity of MDHA reductase, and also that the level of mRNA of MDHA reductase after recovery to $20^{\circ}C$ for 24 hr decreased. 식물의 저온 적응 메카니즘에서 아스코브산과 관련된 효소 중 MDHA 환원효소의 활성도와 과산화수소, 아스코브산의 함량, mRNA의 발현수준과의 연관성을 연구한 결과는 다음과 같다. MDHA 환원효소의 활성도 변화는 저온에 노출되는 시간이 길어질수록 증가하였으며 6시간 이후에 엽록체분획과 세포질분획에서 급격하게 증가하는 경향을 보였으나 실온으로 회복시켰을 때 효소의 활성도가 상대적으로 감소하는 경향을 보였다. 저온에 노출된 동안 아스코브산의 함량은 비교적 일정한 경향을 보이다가 실온으로 회복시키면 그 이후에는 급격하게 증가하는 경향을 보였다. 반면 저온에 노출되는 동안 급격히 dehydroascorbate 함량이 감소하였다가 실온으로 회복되면 약간 증가하는 경향을 보였다. 아스코브산의 함량과 엽록체분획과 세포질분획의 MDHA 환원효소의 활성도와의 상관관계는 각각 정의 상관($R^2$=0.9240, 0.9108)을 나타내었으나 디하이드로아스코브산의 함량과 MDHA 환원효소의 활성도 사이에는 각각 부의 상관($R^2$=0.8638, 0.8980)을 나타내었다. MDHA 환원효소 활성도와 과산화수소의 함량과의 상관관계를 과산화수소의 생성량이 증가하면 MDHA 환원효소의 활성도가 증가하는 정의 상관($R^2$=0.9443, 0.9647)을 나타내었다. 저온스트레스 처리 시간이 증가할수록 MDHA 환원효소의 mRNA의 발현 수준과 총 MDHA 환원효소의 활성도가 증가하는 경향을 나타내었다.

        • SCIEKCI등재
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