搜索结果: 1-4 共查到“农业基础学科 Freezing”相关记录4条 . 查询时间(0.085 秒)
冻融循环对甲壳素凝聚态结构和脱乙酰反应的影响（Effects of Freezing-thawing Cyclic Treatment on Condensed State Structure and N-deacetylation of Chitin）
甲壳素 冻融循环处理 N-脱乙酰反应
2009/11/3
甲壳素和质量分数为40%的浓NaOH溶液的混合物在-18℃和40℃条件下反复进行冻融处理，结果表明慢速冷冻加低温解冻的冻融循环处理过程中，冰晶的反复形成和重结晶能够破坏甲壳素凝聚态特别是晶态结构。经过3次冻融循环处理，可使甲壳素在NaOH溶液中完全溶解，获得甲壳素最终质量分数为4%，NaOH最终质量分数约为10%的均相溶液，为用均相脱乙酰法制备半脱乙酰水溶性甲壳素提供前提。
Increased Cell-Wall Mass and Resistance to Freezing and Snow Mold during Cold Acclimation of Winter Wheat under Field Conditions
Carbohydrate accumulation Cell-wall mass Cold acclimation Freezing resistance Snow mold resistance
2009/7/23
Accumulation of soluble carbohydrates plays an important role in enhancement of resistance to freezing and snow mold of plants during cold acclimation. Nevertheless, few studies have examined whether ...
Effects of pre-freezing treatment methods on the quality retentionof thawed areca fruit
areca fruit quick freezing protection color microwave liquid nitrogen
2008/11/26
The effects of different treatments, before freezing, on thawed areca fruit were studied in this paper. Blanching in 0.5% sodium bicarbonate solution or water had no effect on the prevention of color ...
Effect of solid phase wettability on water transport and retention in peat enriched soil affected by freezing/thawing
wettability water retention freezing/thawing soil
2008/11/20
Samples of A and B horizons of arable loessial soil, with and without the addition of c.a. 9% of peat and subjected to six freezing/thawing cycles, were studied. Surface free energies and water contac...