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적미병 보리의 유독성분에 관한 연구 (제 III 보) 유독성분과 Choline 과의 관련성에 관하여
김태봉,한보섭,Kim, Tae-Bong,Hahn, Bo-Sup 대한화학회 1964 대한화학회지 Vol.8 No.2
It has been pointed out that various substances such as "toxoalbumin", glycoside, choline or readily hydrolysable choline derivatives, alkaloid, lysolecithine etc. are associated with the toxicity of the infected grain. But animal tests and analysis of paper chromatography by author's indicated that a basic substance present in the concentrated extracts from the grain may neither be acetylcholine, betaine, nor choline. This problem still have to be examine further.
적미병 보리의 유독성분에 관한 연구 (제 II 보) 유독성분의 분포, 제거방법 및 제독성 물질에 관하여
김태봉,한보섭,한상현,Kim, Tae-Bong,Hahn, Bo-Sup,Hahn, Sang-Heyun 대한화학회 1964 대한화학회지 Vol.8 No.2
In this report, some practical problems that are concerned with the infected barley were examined. Most of the toxic substance is present in the bran. It was almost impossible to remove the toxic substance with water or methanol completly, however, we found it is effectively eliminated by soaking the whole grain with 2%, calcium hydroxide suspension for 24 hours. As a detoxifying agent, kieselguhr was very effective; the grain mixed with little amounts (0.4-0.5%) of kieselguhr may be used as an animal feed.
적미병 보리의 유독성분에 관한 연구 (제 I 보) 동물실험에 의한 유독성의 확인
김태봉,한보섭,한상현,기용숙,Kim, Tae-Bong,Hahn, Bo-Sup,Hahn, Sang-Heyun,Kee, Ryong-Suk 대한화학회 1964 대한화학회지 Vol.8 No.2
It was confirmed that korean scabby barley during the summer of 1963 was infected with Gibberella zeae. Feeding experiments showed that the diseased grain was toxic and induced emesis in pigs. The concentrated extracts which contained the emetic principle were prepared by refluxing the grain with methanol or water for 5 hours and then concentrating the filtrates and the washing in vacuum. Animal tests proved that methanol extraction for the emetic principle was more effective than extraction with water.
Aminopyrimidine 유도체에 대한 아질산의 작용 [III] Diazotizated 5-Amino-6-Methyluracil에 대한 Sandmeyer 반응
장세희,한보섭,김인규,오세화,Chang, Sae-Hee,Hahn, Bo-Sup,Kim, In-Kyu,Oh, Sea-Hwa 대한화학회 1966 대한화학회지 Vol.10 No.2
Sandmeyer 반응으로 5-Amino-6-methyluracil로 부터 5-iodo-, 5-chloro- 및 5-bromo-6-methyluracil을 간편하게 합성하는 방법을 새로히 마련하였다. 이 방법에 따르면 5-halo-6-methyluracil이 70% 이상의 좋은 수득률로 얻어지며 부반응을 수반하지 않으므로 생성물의 정제가 쉽고 편리하게 5-halouracil을 얻을 수 있다는 이점이 있다. A new conventional method for the preparation of 5-iodo, chloro-, and bromo-6-methyluracil by Sandmeyer reaction was described. According to this procedure, 5-halo-6-methyluracils have been prepared in high yields (up to 70%) without any difficulties to obtain highly pure products. No appreciable competing reaction was observed.
Spot Test for Amins Acids with Alloxan
김태봉,한보섭,Kim, Tae-Bong,Hahn, Bo-Sup Korean Chemical Society 1964 대한화학회지 Vol.8 No.2
In order to stabilze alloxan as a reagent for detection of amino acids by spot test, sugars and other reductants were added to the aqueous alloxan solution. It was found that lactose was the best for the purpose. The alloxan reagent containing lactose did not give color change on blank test and was very stable that there was no color change even it was allowed to stand in room temperature for several months. The color reaction with amino acids and some amines was not affected by lactose. This spot test for amino acids is in sensitivity as comparable to that of the previously reported methods and gave color reaction with proline and hydroxyproline to 1${\gamma}$ and 5${\gamma}$ respectively. Alloxan에 의한 Amino acids의 spot test에 있어서, alloxan수용액에 lactose를 가해주면, alloxan 자신의 착색을 막을 수 있다. lactose를 포함하는 alloxan수용액은 매우 안정하여서, 실온에서 수 개월 동안 두어도 착색되지 않으며, lactose의 존재로 말미암아, alloxan과 amino acids와의 색반응은 조금도 영향을 받지 않았다. 이시약에 의한 amino acids의 spot test법은 ninhydrin에 의한 spot test보다 예민하고, 또 alloxan 또는 dimethylalloxan을 발색약으로 사용하는 paper chromatography법에 비해, proline (1 ${\gamma}$), hydroxyprolin (5 ${\gamma}$)를 확인할 수 있다는 장점을 가지고 있다.
5-Aminopyrimidine에 대한 아질산의 작용 [Ⅱ] Isobarbituric acid의 새 합성법
장세희,김인규,한보섭,Chang Sae Hee,Kim In Kyu,Hahn Bo-Sup 대한화학회 1965 대한화학회지 Vol.9 No.2
5-Aminouracil을 디아조화한 다음 가수분해시켜 간편하게 isobarbituric acid를 합성하는 새로운 방법을 마련하였다. 이 방법에 따르면 전혀 부반응이 일어나지 않고 대체로 75%이상의 좋은 수율로 isobarbituric acid의 합성이 가능하다. A new method of synthesis of isobarbituric acid is described. With this method, isobarbituric acid can be synthesized both directly and conveniently. Yields of isobarbituric acid are up to 75 per cent.
김상수,안종일,한보섭,Kim, Sang-Su,An, Jong-Il,Han, Bo-Seop 한국결정학회 1990 韓國結晶學會誌 Vol.1 No.2
1,3-Diazatricyclo (5.2.1.O5.10) decade-2,4dione, C8H10N2O2의 단위세포 상수는a=6.585(7), b=9.089(4), c=12.937(10)A, β=95.72(5)˚, V=770.43, Dc=1.4391c0, 1=1.Ocm-1,7 =295 ˚K, 공간군은 P21/n이고 단사 정계이며 Z =4이 다. λ(Mo K u ) =0.7093A을 사용한 698개 의 회절 반점에 대한 최종 신뢰도 R값은 0.037이다. 본 화합물은 N1-(w-butenyl)uracil의 분자내 (2+2) 광고리화 반응 생성물이며, (5.1. 2.O5.10) tricyclic 계에 속한다. Inversion symmetry에 의해 관련된 한 쌍의 분자들은 uracil 부분의 02와H3간 의 강한 수소 결합을 하고있다 1,3-Diazatricyclo (5.2.1.Os .to) decane-2,11-dione , C8H10N2O2. MW=166.15, Monoclinic, P2/n a= 6.585(7) , b=9.089(4), c=12.937(10)A, β=95.72(5)˚, V=770.4A3, Z=4, Dc=1.43(4) g/cm3, λ (Mo Ka)=0.7093A, r=1.Ocm-1, T=295˚K, final R=0.037 for 698 unique observed reflections. The compound is the product of the intramolecular (2+2) photocycloaddition of Nl-(w-butenyl)uracil and belongs to a (5.2.1.O5.10) tricyclic system. A pair of molecules related by the inversion symmetry are held together by the strong hydrogen bonding interactions between 02 and H3 of the uracil moiety.
Reaction of Nitrous Acid on 5-Aminopyrimidines (I) Sandmeyer Reaction of Diazotizated 5-Aminouracil
장세희,김인규,박도순,한보섭,Chang, Sae-Hee,Kim, In-Kyu,Park, Do-Soon,Hahn, Bo-Sup Korean Chemical Society 1965 대한화학회지 Vol.9 No.1
Sandmeyer 반응으로 5-aminouracil로부터 5-iodo-, 5-chloro-및 5-bromouracil을 간편하게 합성하는 방법을 세로히 마련하였다. 이 방법에 따르면 5-halouracil이 75% 이상의 좋은 수율로 얻어지며, 부반응을 수반하지 않으므로 생성물의 정제가 쉽고 편리하게 5-halouracil을 얻을 수 있다는 이점이 있다. A new conventional method for the preparation of 5-iodo-, chloro-and bromouracil by Sandmeyer reaction was described. According to this procedure, 5-halouracils have been prepared in high yields(up to 75%) without any difficulties to remove of impurities. No appreciable competing reaction was observed.