주로 약용이나 차용으로 종래 이용되고 있는 유자와 대추, 당과 Vitamin C등이 풍부하여 생식 뿐 아니라 가공품등으로 널리 이용되고 있는 감등의 국내 고유 과실중 근래기능성 식품소재로 활용되고 있는 식이섬유를 종류별로 과육과 과피로 분리하여 분석하였다. 유자과육과 과피의 식이섬유 함량은 과육부에서 불용성 식이섬유, 가용성 식이섬유, 총 식이섬유량이 신선물 기준으로 각각 2.61%, 1.25%, 3.47%이었으며, 과피부분에서는 각각 7.32%

An effective grafting method for jujube nursery trees was developed to shorten the operation time, improve the percentage of "takes" and shoot emergence, and form the better graft union. Out of 7 grafting methods, the splice, modified scion Ono graft and the bark graft showed relatively short operation time during the grafting operation comparing to the modified rootstock Ono graft or the chip budding. Among these methods, the bark graft demonstrated 100% "takes", but the modified scion Ono graft or the standard Ono graft showed 58.3% of "takes". The percentages of the vegetative shoot emergence were 100% for the bark graft, 70% for the modified scion Ono graft and lower emergence percent for the rest grafting methods. The union tissue formation for the modified scion Ono graft, the bark graft, or the whip-and-tongue graft was significantly larger than the standard Ono graft or the splice graft. In a close examination of the cross sectional areas of the graft union formation through the microscope, the bark graft was superior, the standard Ono graft was inferior and rest of the grafting methods were intermediate.

This study was carried out to investigate change in the components according to drying methods of jujube. Raw jujube was dried with five methods such as sun-drying, hot-air drying after pretreated with sunlight, blanching, microwave treatment, respectively. The contents of soluble sugar and protein in sun-dried jujube were higher than those of other drying methods. The free sugars of dried jujube were consisted of sucrose, glucose and fructose. And the contents of free sugar was not different by drying methods. The major organic acids of dried jujube were oxalic acid, citric acid and malic acid. The contents of glutamic acid, glycine and alanine were higher than those of other amino acids, and the content of each amino acid was not different by drying methods.

대추의 연화현상을 연구하고자 건조중에 세포벽 구성성분의 변화를 조사하였다. 알코올 불용성 물질, 세포벽 및 수용성 물질의 함량은 건조 6일까지는 변화가 없었으나 건조 9일째에는 알코올 불용성 물질과 세포벽은 감소하였으나 수용성 물질은 증가하였다. 펙틴질과 헤미셀룰로오스는 건조 6일까지는 거의 변화가 없었으나 건조 P일째에는 펙틴질과 알칼리 가용성 헤미셀룰로오스가 감소한 반면 산가용성 헤미셀룰로오스는 증가하였다. 셀룰로오스는 건조 중에 증가하였다.

개체당 중량과 과육부의 중량은 천일건조한 것이 2.80.03g/ea로 다른 건조방법에 비해 낮았다. 수분함량도 역시 천일건조한 것이 열풍건조를 비롯한 다른 방법에 비해 낮았다. 수분재흡수율은 열풍건조한 것이 다른 건조방법에 비해 높았으며 천일건조한 것이 가장 낮았다. 건조대추의 경도는 천일건조한 것이 8.6106dyne/으로 다른 건조방법에 비해 월등히 높았다. 부패율은 천일건조대추는 15.3%로 다른 건조방법에 비해 매우 높았고, 갈변도는 천일

세포들은 변색기까지는 아주 조밀하게 결합하고 있었으나 완숙기에서는 세포벽 중층이 다소 분해되어 둥근 형태의 세포를 관찰할 수 있었다. 세포벽 변화는 녹숙기에서는 중층을 구별할 수 없을 정도로 세포벽이 발달되지 않았으며 변색기에서는 중층을 관찰할 수 있었고 완숙기에서는 분해되어 완전히 분리되는 것을 관찰할 수 있었다. 세포의 조직은 녹숙기에서는 mitochondria, endoplasmic reticulum 둥의 조직과 소액포를 관찰할 수 있었으나

국내 재배 산약 제품의 가공 이용방법개발의 일환으로 산약, 당귀, 대추 등 혼합약재를 이용한 고형차 개발시험의 기초 자료를 제공하고자 산약, 당귀, 대추의 각 약재별, 추출시간별, 약재 혼합비율별 총 추출수액, 당도, 엑스함량을 조사하고 과립화한 결과는 다음과 같다. 1. 산악, 당귀 및 대추의 각 약재를 130℃ 조건에서 8시간 추출하였을 때 각 약재의 총 추출 수액, Brix당도 및 엑스함량 모두 대추가 가장 높았고, 당귀, 산약의 순으로 나타나 산약의 단독이용보다는 흔합약재의 이용이 바람직한 것으로 평가된다. 2. 혼합약재 이용시 130℃조건에서 추출시간을 8시간과 12시간으로 달리 하였을 때 총 추출 수액의 량은 통계적으로 유의성 있는 차이를 나타내지는 않았다. 그러나 Brix당도 및 엑스함량은 12시간 추출이 8시간 추출보다 각 1.17%, 1.80% 높은 양상을 나타내어 통계적으로 유의성이 인정되었다. 3. 산약, 당귀, 대추 각 약재의 혼합비율별 총추출수액, Brix당도. 엑스함량을 조사한바 산약 : 당귀 : 대추가 30 : 40 : 30 (750g : 1,000g : 750g)의 비율로 혼합된 약재에서 가장 높았으며, 40 : 30 : 30 (1,000g : 750g : 750g)의 비율로 혼합된 약재가 가장 낮은 결과를 나타내었다. 4. 엑스 20%, 포도당 70%, 유당 10%로 배합한 것이 외관상 양호하였다. 5. 과립 굵기는 직경 1.5mm로 하는 것이 제조, 건조가 능률적이였고 제형이 우수 하였다.

Effect of modified atmosphere packaging conditions on quality changes of dry jujube was investigated. Dry jujubes with moisture content of 26.7% were packaged in PET/Al/PE film pouches with modified atmospheres. The tested packages include those with normal air, vacuum, CO2 flushing, N2 flushing and O2 scavenger. Packages were stored at 25 for 6 months, during which ascorbic acid concentration, browning level, titratable acidity and surface color were measured. Generally modified atmosphere packages could improve quality retention of dry jujubes except that vacuum package resulted in large surface color change. CO2-flushed package showed the best quality retention of high ascorbic acid content and low browning during 112 days, but caused high amounts of ascorbic acid destruction and browning in longer storage. In all the modified atmosphere packages titratable acidity reached a maximum followed by decline and subsequent rise, while it increased linearly with time in normal air package. Considering ascorbic acid retention browning level and surface color changes during 112 days, the packages of CO2 flushing and N2 flushing were better than others.

In order to provide informations for designing packaging and storage condition of dry jujube (Zizyphus jujuba MILLER), moisture sorption isotherm was determined for temperatures of 20, 30 and 4, and quality changes were evaluated as function of temperature and water activity. Dry jujube at a given water activity showed higher equilibrium moisture content for lower temperature. Moisture isothem could be fitted by GAB model equation, giving higher C value, lower m0 and relatively constant k value with increase in temperature. Ascorbic acid was lost more highly at higher temperature and water activity, and showed negligible retention for whole range of water activity and temperature studied after 141 days. Browning increased with water activity up to 0.73 at 30 and 4. Dry jujube of high water activity had high L value in surface color, which represent brightness of surface color. Considering quality retention in the storage, dry jujube is desired to be dried to water activity of 0.42 and be stored at temperature below 3

This paper was investigated the changes of the cell wall components, enzyme activities during ripening of jujuba fruits for elucidating the softening metabolism of jujuba fruits. Firmness were decreased during ripening. Moisture content did not show any notable cahanges until ripening stage but they decreased a little In overripe jujuba fruits. Polygalacturonase activities were not detected at nature green stage and -galactosidase activities were until turning stage. But polygalacturonase activities in ripening and overripening were 51.31 and 100.72 units/100g-fr, wt. respectively. -galactosidase activities were 16.05 and 182.55units/100g-fr. wt. in the same stages. The content of water-soluble protein was increased in overripening. Stage the contents of cell wall and alcohol-insoluble material were. decraesed during maturation, but water-soluble material was increased. The pectin and alkali-soluble hemicellulose were increased until ripening stage, but decreased in overripe jujube fruits. The total pectin and insoluble pectin during ripening, but decreased in overripe jujuba fruits.