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10 June 2000, Volume 29 Issue 02
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Changes of quality and fatty acids in the seed oil of
Melastoma dodecandrum
fruits during ripening
SHI Dong-mei, CHEN Bing-hua, LIU Jian-qiu
2000, 29(
02
): 1-4.
Abstract
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The quality of
Melastoma dodecandrum
fruits at different ripening stages were studied. The results showed that Vitamin C and total sugar at ripe stage reached the maximum value and total acids was the minimum. The optimum harvest was at the ripe stage which had the proper sugar/acid ratio, moderate hardness, colorful appearance and excellent taste. The study on the fatty acids in the seed oil showed that unsaturated fatty acids dominated in fatty acids, particularly linolenic acid, accounting for 84% and the content of fatty acids did not change greatly.
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Morphology of chalazal region on endotesta in the seeds of Magnoliaceae and those of related families
XU Feng-xia
2000, 29(
02
): 5-10.
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The seeds of Magnoliaceae, Winteraceae, Illiciaceae and Schisandra-ceae were observed. The results showed that the seeds of Magnoliaceae are of endotestal seeds with two special morphological types, i.e. the pore type and the tube type in the chalazal region and the others are of extotestal seeds. It can be deduced that these three families have loose relationships with Magnoliaceae of which species form a natural group.
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Effect of laser and magnetic field on pigment content of callus of
Onosma paniculatum
HONG Li-ping, HUANG Wei-nan, WANG Man-si
2000, 29(
02
): 11-14.
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Onosma Paniculatum
treated with He-Ne laser and magnetic field of certain intensity was studied. The results showed that the pigment content was higher after 2~3h laser radiation and the cell growth and pigment formation could be reduced in 1.0 T magnetic field. The two kinds of physical factors had no obvious influence on
Onosma paniculatum
pigment composition by the chromatographic analysis with thin-layer silica gel.
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Determination of essential oil from
Cinnamomum camphora
var.
linaloofera Fujita
by capillary column chromatography
CHEN Deng-xiong, OUYANG Rui-zhen, WANG Zhen-zhong, CAI Bang-ping, CHEN Song-he
2000, 29(
02
): 15-18.
Abstract
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A method was developed for the determination of linalool and eucalyptus oil in
C. camphora
var.
linaloofera Fujita
by capillary column chromatography using a 40m-length quartz column. Methanol was used as mobile phase with programmed column temperature. The recovery rate was over 94.2%, c.v. was below 3.21% and the method is applicable.
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Comparative experiment on characters of elite trees of
Castanda henryi
varieties
HUANG Ming-li
2000, 29(
02
): 19-22.
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16 elite trees were selected out on the basis of investigation on
Castanda henryi
varieties in main producing area of
C. henryi
in Jian'ou, Fujian. The results of the investigation and analysis on the characters of elite trees showed that the differences between each variety are significant, suggesting that it may be further selection of good varieties.
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Fiber morphological character and chemical composition of the wood of
Rhododendron simiarum
ZHENG Ling-feng, HUANG Dong-ming, YOU Sheng-yong, ZHU Chuan-zhi
2000, 29(
02
): 23-26.
Abstract
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(233KB) (
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Based on the determination and analysis of the fiber morphological character and chemical composition of
Rhododendron simiarum
wood, the feature of its fiber morphology and chemical composition and the pattern of change in fiber morphology with age were revealed.
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Growth dynamics of bamboo shoot and young bamboo of
Dendrocalamopsis oldhami
GAO Rui-long, LIN Zhong-ping, WANG Jie-ling
2000, 29(
02
): 27-30.
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By surveying the growth of bamboo shoots and young bamboos of
Dendrocalamopsis oldhami
in Fuan, the center of bamboo ecological distribution in China, and their growth characteristics were studied. The results showed that the rate of bamboo sprouts and the individual weight of bamboo varied at different growth seasons. The young bamboo from coming up out of the ground to growing up from a shoot were measured and the changes of new bamboo groves planted in the alluvial flat of river beach were compared. All these provide scientific basis for assets evaluation in bamboo groves.
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Predacious response of Misumenop tricspidatus to Plutella xylostella larvae
HUANG Jun-mei, WU Mei-xiang, YOU Min-sheng
2000, 29(
02
): 31-35.
Abstract
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Functional predacious response of
Misumenop tricspidatus
to
Plutella xylostella
larvae and effect of interferential factors on predacity were studied under the laboratory text. The results indicated that the type of functional response of the spiders referred as to Holling's Ⅱ and the predacious efficiency decreased as the increase of predator-prey ratio. The female spiders killed more larvae than the male ones. There was no significant difference between experimental data and theoretical data by X
2
-test.
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Studies on the property of moulding sand binder of non-environmental pollution
LIANG Chu-si, CHEN Jia-ling, LIN Zong-han, HUANG Ting-fang
2000, 29(
02
): 36-39.
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Taking cassava as materials, the technical properties of a new type of binder were investigated and the effects of technical factors on drying tensile strength of binder were tested. The results showed that B-type binder possessed special properties of making the molding sand, suggesting that it may replace the tung oil and HZ oil used in foundry in the future.
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Tissue culture of
Sabina chinensis
GU Xi-rong, SHI Da-xing
2000, 29(
02
): 40-42.
Abstract
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Taking the young stem sections of 5 year-old
Sabinas chinensis
as explants, the effect of BA regulation on plantlets and its multiplication were studied. The results showed that the plantlets grew well on 1/2MS medium containing BA at 0.5mg/L, NAA at 0.5mg/L and IBA at 0.2mg/L with the shoots differentiation at the rate of 95.0%;a combination of MS with BA at 1.0mg/L and NAA at 0.01mg/L gave the best result for multiplication of shoots.
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The evaluation of ornamental value of foliage plants using fuzzy mathematics
LIN Shao-sheng, LI Hua-fen, CHEN Yi-zeng
2000, 29(
02
): 43-47.
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The ornamental value of 29 cultivars and 23 wild species of foliage plants are evaluated using fuzzy mathematics to ascertain the grades of them and the orders of the same grade plants. The advantages and defects of using fuzzy mathematics on evaluating the grade and the order of various plants which have many indexes and the indexes are difficult to measure are also discussed.
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A preliminary study on cultivation of
Nervilia plicata
XU Hui
2000, 29(
02
): 48-49.
Abstract
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(135KB) (
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An excellent flower——
Verbena hybrida
LAI Rui-yun, ZHANG Wei-peng, LIN Jian-zhong
2000, 29(
02
): 50-51.
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(144KB) (
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Tissue culture of Gerbera
jamesonii
LIU Fu-ping, LIN Li-xian, ZHOU Xiao-lu, HUANG Jun-mei
2000, 29(
02
): 52-52.
Abstract
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(79KB) (
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A review of structure of photosynthetic oxygen-evolving system
LIU Hui-li, LI Ling
2000, 29(
02
): 53-57.
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The recent advances in the study of photosynthetic oxygen-evolving system are introduced in this review.
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A review of fruit preservation with heat treatment
CHEN Hong-guo, PENG Yong-hong
2000, 29(
02
): 58-64.
Abstract
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(471KB) (
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The application of heat treatment technology in controlling postharvest fruit diseases and pests and delaying fruit senescence have been emphasized in recent years. The methods of heat treatment, the influence of heat treatment on fruit physiology, biochemistry, quality and its application status and future are summarized.
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A review of progress in study of Chinese loquat germplasm resource,selection and breeding
LIU Guo-qiang, LIN Zhi-qing, LIN Wen-zhong, LAI Zhong-xiong
2000, 29(
02
): 65-70.
Abstract
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(447KB) (
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The origin and distribution of Chinese loquat are described. The classification of its cultivars, fundamental research of germplasm resources, and selection and breeding are also outlined.
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