变褐

The results showed that there was a negative relationship between H2O2 content and CAT activity, thus H2O2 content was low when CAT activity was high. There was a close relationship between H2O2 content and differentiation process. H2O2 could be an important signal transduction factor during bud differentiation. IAA oxidase activity was decreased firstly, and then increased, which affected IAA oxidase and degradation pathway and regulate ratio of cytokinin and auxin. With differentiation process continuing, PPO activity was increased, which could cause browning or vitrifaction of seedling, or even malformation.

研究结果表明，鹅掌楸组培再生过程中，过氧化氢酶活性与H2O2含量变化呈负相关，CAT活性较高时，H2O2含量则较低。H2O2含量与鹅掌楸组培苗分化进程密切相关，H2O2可能作为信号因子在芽分化过程中发挥重要作用；IAA氧化酶活性呈现先下降后增加的变化规律，从而影响IAA氧化降解途径，调控细胞分裂素与生长素含量的比值，影响鹅掌楸芽的再生；PPO活性随培养时间的增加而升高，引起组培苗的褐变或玻璃化，甚至生长畸形。

Antioxidants of 100 mg/L PVP, 100 mg/L Vc and sorbent of 500 mg/L AC can control browning efficiently. PVP and Vc restrain callus growth, whenas AC can stimulate it.

5mg/L GA3为组培苗的最佳生根培养基，生根率达100%；一定浓度的PVP，Vc或者AC能有效控制褐变现象的发生。

An orthogonal experiment was carried out to investigate the effects. Browning and diet cellulose of Agaricus blazei in keep fresh was analyzed.

采用正交实验方法，分析了不同处理对姬松茸的褐变程度及膳食纤维素的影响。

The stem tops and stems with node of young bamboo of Bambusa ventricosa, B. multiplex cv. Fernleaf and B. multiplex were used to study the callus induction and brown stain control.

利用小佛肚竹、凤尾竹和孝顺竹幼竹的茎尖和带节茎段研究了愈伤组织诱导和控制褐变的方法。

The aberrant phenotypes were observed in the anther of tobaccotransformed with ZM401 sense construct: the inflorescence growth and floral axiselongation are suppressed; the flower buds falling or flowers abscission earlier wereobserved. The degradation of tapetum are not observed at the binucleate pollen stagewhich corresponds to the mature stage, although the tapetal cells of untransformedtobacco anther at the same stage have already degenerated completely anddisappeared.

对转基因烟草进行形态学、组织学分析结果表明，ZM401基因以反向方式整合的转基因烟草表现一切正常，而含有ZM401正义基因的转基因烟草在表型和组织学上都出现了异常：花序生长缓慢，花序轴变短，生长过程中花逐渐脱落，花序轴褐化枯死；花药绒毡层退化延迟，药室内壁在雄配子体发育后期不能进行带状加厚，阻碍了花粉粒的释放。

After PPO being destroyed,oxidation and condensation of polyphenols were the causes of banana juice browning before juice was sterilized,while caramelization of sug ar played an important role in browning during sterilization.

当热烫充分时，酚类化合物氧化聚合是杀菌前香蕉汁褐变的主要原因，而杀菌时的色泽变化主要是糖类焦糖化反应的结果。

Study on knojac coating storing of taro without skin;2. Different package treatments on fresh-cut taro Colocasia esculena

与对照、聚乙烯塑料薄膜包装相比，4℃贮藏的前12天，真空包装能较好地保持鲜切芋头的可溶性固形物含量和淀粉含量，褐变度、丙二醛含量和多酚氧化酶的活性较低，而超氧化物歧化酶活性较高。

Those processed sebastan plum cordia in maturity level of 8 to 9 showed no austerity, but due to their higher activity on polyphenol oxidase, immediate processing or dipping in 3％ of salt water was a necessary step after picking up to avoid their browning reaction.

但因成熟度8~9分的破布子其多元酚氧化活性较大，因此采收后须立即加工处理或浸泡在3％食盐水中，以避免发生褐变反应。

The fan gently sends air to every area of the food,quickly browning,crisping and sealing in moisture and fiavor.

电扇轻轻的把空气吹到食物的每个表面，很快使食物褐化，变脆，保持水分与口味。

In addition, the inhibition of flesh leatheriness development of loquat fruit by hypobaric pressure storage was correlated to the reduced POD and PAL activities.

结果表明，减压处理可明显抑制冷藏枇杷果实的呼吸强度、乙烯产生和果实褐变，并保持较高的果实可溶性固形物、可滴定酸度和维生素C含量，抑制贮藏21 d后果实硬度的增加，减轻出汁率的下降，降低POD和PAL酶活性的上升趋势，抑制木质素含量的增加。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失