Studies on Contents of Amino Acids in Citrus Junos Sieb

유자중(柚子中) Amino Acids에 관(關)한 연구(硏究)

The chemical composition of amino acids in the rind and fresh of Citrus Junos Sieb was studied and compared with that of Citrus natsudaidai Hayate. The results were summarized as follows. 1. Beth of them contained twenty kinds of amino acids, including three kinds of unknown amino acids. 2. Proline in the rind of Citrus Junos and aspartic acid in the rind of Citrus natsudaidai were the richest of all amino acids but on the contrary. Histidine was the poorest of all amino acids in the rind of them. The content of proline amounted to 16.48 mg/100mg in the rind of Citrus Junos and the content of aspartic acid amounted to 32.18 mg/100mg in the rind of Citrus natsudaidai. 3. Aspartic acid was the richest of all amino acids in the flesh of Citrus Junos and the content of it amounted to 32.68mg/100mg. On the other hand, Proline was the richest of all amino acids in the flesh of Citrus natsudaidai and the content of it amounted to 20.93mg/100mg. But the content of histidine as 1.32 mg/100 mg in the flesh of former and tyrosine as 1.18 mg/100 mg in the flesh of latter were relatively small. 4. In the fruits of Citrus Junos and Citrus natsudaidai, aspartic acid and Proline were rich and histidine was poor in quantity. Generally, Flesh contained more amounts of all kinds of amino acids than those rind and especially glutamic acid was richer, compared with other amino acids in flesh.

유자(柚子)의 성분(成分)인 Amino acid의 함유량(含有量)을 구명(究明)하기 위하여 유자(柚子)와 하귤(夏橘)을 각각(各各) 비교(比較) 검토(檢討)하였든 바 다음과 같은 결과(結果)를 얻었기에 이에 보고(報告)하는 바이다. 1 유자(柚子)나 하귤중(夏橘中)에 총(總) Amino acid수(數)는 3종(種), 합(合)하여 20종(種)에 달(達)하였다. 2. 과피율(果皮率)에 유자(柚子)와 하귤(夏橘)의 Amino acid 함유량(含有量)은 전자(前者)에 Proline 16.48mg/100mg, 후자(後者)에는 Aspartic acid 32.68mg/100mg이 각각(各各) 최고(最高)이며 Histidine은 공(共)히 함유량(含有量)이 적었다. 3. 과육중(果肉中)에는 유자(柚子)의 경우 Aspartic acid 32.68mg/100mg, 하귤(夏橋)은 Proline 20.92mg/100mg로 가장 많았고, 전자(前者)에 Histidine 1.32 mg/100mg, 후자(後者)에는 Tyrosine 1.18mg/100mg로 비교적(比較的) 적었다. 4. 유자(柚子)나 하귤중(夏橘中)에는 Amino acid중 일반(一般)으로 Aspartic acid, Proline의 함유량(含有量)이 많다는 것을 알 수 있고 Histidine이 가장 적게 들어 있으며 과육중(果肉中)에는 과피(果皮)보다 각종(各種) Amino acid 함유량(含有量)이 많고 그 중에서도 Glutamic acid가 다른 Amino acid보다 많이 함유(含有)되어 있다.