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桑叶
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  mulberry leaves
    INFLUENCE OF CO_2 CONCENTRATION ON NET PHOTOSYNTHETIC RATE, TRANSPIRATION RATE AND STOMATAL CONDUCTANCE OF MULBERRY LEAVES
    CO_2浓度对桑叶光合速率、蒸腾强度及气孔传导率的影响
短句来源
    Silkworm larvae at the middle stage of the fifth instar or the mulberry leaves were sprayed with the insect juvenile hormone analogue 738 labelled with 3H (3H-JHA-738). Radioactivity determinations showed that the mean excretion rates of 3H-JHA-738 in the sprayed larvae were 1.8% for the first 4 hours, 61.7% for the first 48 hours and 67.2% at the end of the experiment;
    用氘标记的昆虫保幼激素类似物738(代号~3H-JHA-738)对5龄中期家蚕进行涂布蚕体和涂布桑叶添食,经测量查明:涂体处理后,放射性经蚕粪平均排泄速率,4小时为1.8%,48小时达到61.7%。 试验终了为 67.2%;
短句来源
    EFFECTS OF FEEDING WITH F·CONTAMINATED MULBERRY LEAVES ON QUALITY OF DRY COCOON AND SILK
    用氟污染桑叶饲养蚕对干茧和丝质量影响的研究
短句来源
    The Effects of Extract of Mulberry Leaves(Morus alba L.)on Scavenging the Oxygen Free Radicals in Vitro and on the Life Span of Drosophila melanogaster
    桑叶提取液对体外氧自由基的清除作用以及对果蝇寿命的影响
短句来源
    Study of Chemical Constituents and Pharmacological Activities of Mulberry Leaves and Their Utility Zou Shengqin
    桑叶的化学成分、药理活性及应用研究进展
短句来源
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  mulberry leaf
    A STUDY ON THE INFLUENCE OF THE MULBERRY LEAF'S MATURITY OF DIFFERENT DEGREES ON THE SILKWORM UNDER HIGH TEMPERATURE
    高温环境中不同成熟度的桑叶对家蚕影响的研究
短句来源
    2. Among the artificial diets used in the experiments, the diet with the following ingradients yields better results than other diets: dry mulberry leaf powder, 45 g; defatted soybean meal, 25 g; corn starch, 5g;
    2.下述配方较好:桑叶粉45克,豆饼粉25克,淀粉5克,石油酵母5克,蜂蜜5克,柠檬酸3克,维生素C2克,没食子酸0.4克,山梨酸0.3克,氯霉素25毫克,成型剂石花菜15克,加水250毫升。
短句来源
    The three different degrees of the leaf's maturity has an effect on the 5th ins tar larva's viality and it's cocoon's economic performance, accordingly, this study has put forward a curve of growth and a model of mathematics for the silkworm and, with the help of this model , analyzed the growth and development of the 5th instar larva under the abovementioned temperature and conditions of the mulberry leaf.
    观察了在超过28℃的家蚕发育适温上限的高温环境(30~31℃)中这三种不同成熟度的桑叶对二化性家蚕五龄幼虫生命力和茧经济性状的影响,用家蚕生长曲线数学模型分析了上述温度和桑叶条件下家蚕五龄期的生长发育。
短句来源
    (3)With increasing Cd content in the mulberry leaf,Cd content in silkworm body,excrement,chrysalis and silk shell also increased.
    (3)蚕体、蚕砂和蚕茧的镉含量、镉累积量,随着桑叶镉含量的增加而增加。
短句来源
    In the subsystem of feeding silkworm,4.7% of amount of Cd accumulation in taked mulberry leaf by silkworm was removed from feeding silkworm subsystem to reeling mill with cocoon.
    养蚕子系统中,占食下桑叶镉累积量4.7%的镉,经蚕茧移出养蚕系统而转入缫丝业。
短句来源
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  “桑叶”译为未确定词的双语例句
    But the mortality of silkworm was zero when fresh leaves treated with the high concentration additives (ZnSO4, EDTA), the rate was 3.3% when high concentration chitinase or formic acid was provided.
    单独用添加物处理过的桑叶饲喂家蚕幼虫发现添加物本身对家蚕幼虫几乎无毒性,高浓度的ZnSO4、EDTA对家蚕幼虫的致死率都为O,高浓度的几丁质酶、甲酸对家蚕幼虫的致死率只有3.3%。
短句来源
    In the range of 0-500 ppm net photosynthetic rate, transpiration ratio and CO2 concentration in intercellular space of leaves rose linearly with the increase of CO2 concentration.
    CO_2浓度在0~500ppm间,随着CC_2浓度的增高,桑叶的光合速率、蒸腾效率及细胞间CO_2浓度呈直线上升。
短句来源
    The enzymatic activity is inhibited by KCN and is not affected by chioroform-enthanol,which indicates that mulbery SOD is CuZn-SOD.
    桑叶SOD活性能被KCN抑制但不受氯仿—乙醇影响,这表明桑叶SOD为Cu-ZnSOD。
短句来源
    Theresultsshowedthattherateof browningleaf discsinfectedwith Agrobacterium tumefaciens strainLBA4404decreacedby7.2%,regeneration frequencyof kanamycin-resistantbuds increasedby3.9%,transformationfrequencyof Gly gene increasedby9.6%,andthefalsepositivetransformantsas detectedby PCRdecreasedby42.5%.
    在抗性筛选培养基中添加2mgL-1硝酸银,桑叶盘褐化死亡率减少7.2%,抗性芽分化率增加3.9%,外源基因转化频率增加9.6%,“假阳性”转化体减少42.5%。
短句来源
    Effects of Fluoride on the Metabloism of Nitrogen in the Leaves of Mulberry
    氟化物对桑叶氮代谢某些影响的研究
短句来源
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  mulberry leaves
Sterols of Mulberry Leaves and Small Leaf Curl Disease
      
Red fluorescent protein in the digestive juice of the silkworm larvae fed on host-plant mulberry leaves
      
A red fluorescent protein is present in the digestive juice of silkworm larvae when they are raised on fresh mulberry leaves.
      
Enzymatic analyses showed that silkworms fed on mulberry leaves and artificial diets had similar protease activities, but they had different phospholipase C activities.
      
In mulberry leaves, a subcellular structure is involved in mineral deposition and is described here by a variety of cytological techniques.
      
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  mulberry leaf
The influence of oral intake of an antibiotic (Norfloxacin?) through mulberry leaf at two concentrations (50 and 100 ppm) on the feed conversion efficiency parameters of silkworm hybrids, viz.
      
A second primer set (XF176f and XF686r) amplified a 511-bp fragment specific to 98 PD strains, but not from strains of citrus variegated chlorosis, mulberry leaf scorch, oak leaf scorch, periwinkle wilt, phony peach, or plum leaf scald.
      
An Evolutionary Perspective of Pierce's Disease of Grapevine, Citrus Variegated Chlorosis, and Mulberry Leaf Scorch Diseases
      
Changes in Mulberry Leaf Metabolism in Response to Water Stress
      
Mulberry Leaf Metabolism under High Temperature Stress
      
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本研究主要应用滤纸色层分析方法,从桑叶与蚕体内有机酸、氨基酸以及糖的消长关系,探讨不良桑叶品质导致蚕儿健康程度下降的若干生理机制。 在实验中,采用不同肥、水、密植条件下栽培的软嫩桑叶和成熟桑叶作为供试饲料,分别给予五龄蚕儿,同时期分析各类型桑叶及蚕体内胃液、血液和蚕粪的有关化学成分。 研究结果表明,软嫩桑叶中含有多种游离有机酸,计有较多量的草酸和延胡索酸以及含量较少的酒石酸、柠檬酸与琥珀酸。延胡索酸的存在,一般可作为不成熟桑叶的一个标志。成熟桑叶中以含有多量的琥珀酸为特征,也含有较少量的草酸。蚕儿吃了软嫩叶之后,在五龄前半期,蚕粪中的草酸含量显著增多,在后半期,正当蚕粪草酸含量减少时,蚕儿胃液中突然出现较多量的草酸,其健康程度显著下降,而后,发现蚕儿血液中苹果酸的含量大大减少,甚至缺乏。 桑叶中的含糖量依据其成熟程度为转移,软嫩叶中含有的蔗糖、果糖和葡萄糖量明显较少。蚕儿吃了软嫩叶之后,蚕体内胃液与血液中的含糖量也大大降低,这种贫糖现象一直反映到蛹期和蛾期,导致蚕机体生命力的降低。 桑叶中发...

本研究主要应用滤纸色层分析方法,从桑叶与蚕体内有机酸、氨基酸以及糖的消长关系,探讨不良桑叶品质导致蚕儿健康程度下降的若干生理机制。 在实验中,采用不同肥、水、密植条件下栽培的软嫩桑叶和成熟桑叶作为供试饲料,分别给予五龄蚕儿,同时期分析各类型桑叶及蚕体内胃液、血液和蚕粪的有关化学成分。 研究结果表明,软嫩桑叶中含有多种游离有机酸,计有较多量的草酸和延胡索酸以及含量较少的酒石酸、柠檬酸与琥珀酸。延胡索酸的存在,一般可作为不成熟桑叶的一个标志。成熟桑叶中以含有多量的琥珀酸为特征,也含有较少量的草酸。蚕儿吃了软嫩叶之后,在五龄前半期,蚕粪中的草酸含量显著增多,在后半期,正当蚕粪草酸含量减少时,蚕儿胃液中突然出现较多量的草酸,其健康程度显著下降,而后,发现蚕儿血液中苹果酸的含量大大减少,甚至缺乏。 桑叶中的含糖量依据其成熟程度为转移,软嫩叶中含有的蔗糖、果糖和葡萄糖量明显较少。蚕儿吃了软嫩叶之后,蚕体内胃液与血液中的含糖量也大大降低,这种贫糖现象一直反映到蛹期和蛾期,导致蚕机体生命力的降低。 桑叶中发现有十四种游离氨基酸,软嫩叶中的氨基酸特别丰富,成熟叶中则显著减少。软嫩叶中含有多量的游离氨基酸对蚕健康程度没有直接明显的危害,但病蚕胃液与血液中的

The present paper deals with the results from studies on the application of insect juvenile hormone analogues (JHA) and phytoecdysones (phyto-ECD) in se-ricultural practice in the autumnal season 1973. Bivoltine races of Bombyx mori L. were used and several synthetic JHA and two phyto-ECD were employed. The results may be stated as follows.1. Influences of JHA treatment on the rate of food/silk transformation, the spinning of silk threads and the enzymic activities of the digestive fluid: The spray of JHA emulsified...

The present paper deals with the results from studies on the application of insect juvenile hormone analogues (JHA) and phytoecdysones (phyto-ECD) in se-ricultural practice in the autumnal season 1973. Bivoltine races of Bombyx mori L. were used and several synthetic JHA and two phyto-ECD were employed. The results may be stated as follows.1. Influences of JHA treatment on the rate of food/silk transformation, the spinning of silk threads and the enzymic activities of the digestive fluid: The spray of JHA emulsified with Tween 80 (Polysorbate 80) at closes 2-3 μg per larva either directly on the fifth instar larvae 72 hours after moult or on the mulberry leaves with the feeding larvae of the same age caused no great changes in the amount of silk spun per hour and in the rate of food/silk transformation as compared with the larvae in the control set. Owing to the lengthening of the larval stage, however, the total amount of food taken in the whole fifth instar excelled that of the control. It was found that as a physiological response to JHA treatment the amount of food taken in the first three days after the spraying was less than that of the control during the same period. As the larvae in the control set had reached maturity and stopped feeding the JHA-treated larvae would continue to feed so that the total amount of food taken in the instar became greater. Thus in sericultural practice the amount of mulberry leaves given in the first three days after JHA spraying could be appropriately spared. In accordance with the decrease of food intake during the first three days after spraying with JHA it was observed that the rate of silk protein synthesis and the increase in body weight and in amylaseand proteinase activities of digestive juice of the treated larvae were retarded. But these parameters of the treated larvae tended to increase after the larvae in the control set had reached maturity.2. Influences of JHA treatment on the quality of the cocoons as judged with technologically practical standards: Treatment with JHA may improve qualitative characteristics some of which are very important in the industry of silk manufacturing, provided that the dosage of JHA be kept in the appropriate range.3. Influences of phyto-ECD treatment: Phytoecdysone from Achyranthes bi-dentata and ponasterone A were found capable to shorten the last larval instar and to diminish silk production when added to the food of feeding larvae before maturity. But when they were applied after 10% of the larvae had reached maturity and in doses 2-5 μg per larva by spraying, the instar was shortened about 12 hours without any decrease in silk production and diminution in the practical quality of the cocoons. When combined with the application of JHA at different time the sprays of phto-ECD could shorten the instar and save human labour in sericultural practice without affecting the increase of silk production adversely.

1973年在春季试验的基础上,秋期继续进行了昆虫保幼激素类似物增加桑蚕产丝量的研究,并初步研究了植物性昆虫蜕皮激素与保幼激素的配合使用,结果如下: (1)喷布保幼激素类似物3号后,蚕体叶丝转化率与对照差异不大,这和春季结果相符。五龄每小时的产茧层量和食下量的成丝率,激素处理区与对照区均无明显差异。食下干物的总量则前老明显超过后者。但喷布激素后的三天左右时间内处理区的食下量却低于对照区;当对照区见熟后,处理区食下量继续增加。故在激素处理后的三天左右时间内,适当控制用桑是增产和减少桑叶消耗的主要关键之一。 激素处理后三天左右时间内,绢丝物质的生成和体重增加速度均低于对照区,淀粉酶活性也低于对照区。这与食下量变化的规律一致。蛋白水解酶活性的变化与淀粉酶基本相似,但亦具有自己的特点。 (2)保幼激素类似物3号喷布于五龄蚕体后,茧丝长、茧丝量、解舒丝长及有绪率等均明显增高,拉力和抱合显著改善,切断次数减少,匀度、净度、清洁、茸毛等均与对照区相仿,纤度略有偏租的倾向。以上结果与春季试验一致。多次试验结果亦证明在喷布时间和喷布剂量适当的情况下,对蚕丝解舒并无不良影响,但剂量过高,则有导致解舒率下降的危险。 (3...

1973年在春季试验的基础上,秋期继续进行了昆虫保幼激素类似物增加桑蚕产丝量的研究,并初步研究了植物性昆虫蜕皮激素与保幼激素的配合使用,结果如下: (1)喷布保幼激素类似物3号后,蚕体叶丝转化率与对照差异不大,这和春季结果相符。五龄每小时的产茧层量和食下量的成丝率,激素处理区与对照区均无明显差异。食下干物的总量则前老明显超过后者。但喷布激素后的三天左右时间内处理区的食下量却低于对照区;当对照区见熟后,处理区食下量继续增加。故在激素处理后的三天左右时间内,适当控制用桑是增产和减少桑叶消耗的主要关键之一。 激素处理后三天左右时间内,绢丝物质的生成和体重增加速度均低于对照区,淀粉酶活性也低于对照区。这与食下量变化的规律一致。蛋白水解酶活性的变化与淀粉酶基本相似,但亦具有自己的特点。 (2)保幼激素类似物3号喷布于五龄蚕体后,茧丝长、茧丝量、解舒丝长及有绪率等均明显增高,拉力和抱合显著改善,切断次数减少,匀度、净度、清洁、茸毛等均与对照区相仿,纤度略有偏租的倾向。以上结果与春季试验一致。多次试验结果亦证明在喷布时间和喷布剂量适当的情况下,对蚕丝解舒并无不良影响,但剂量过高,则有导致解舒率下降的危险。 (3)牛膝蜕皮激素和百日青甾酮都具有缩短龄期的生理活性?

Since the carbon skeleton of alanine could be furnished by pyruvate through trans-amination with glutamate, glycine and ornithine, the source of pyruvate in the fifth stadium of silkworms is essential for the biosynthesis of alanine, which is one of the chief components of silkworm fibroin, especially in some species of Saturniidae.Malic acid had been previously shown in our laboratory to be present in the leaves of the mulberry and castor plants. In the present paper, it is demonstrated that in the body fluid,...

Since the carbon skeleton of alanine could be furnished by pyruvate through trans-amination with glutamate, glycine and ornithine, the source of pyruvate in the fifth stadium of silkworms is essential for the biosynthesis of alanine, which is one of the chief components of silkworm fibroin, especially in some species of Saturniidae.Malic acid had been previously shown in our laboratory to be present in the leaves of the mulberry and castor plants. In the present paper, it is demonstrated that in the body fluid, the posterior division of the silk gland and the midgut, oxaloacetate and pyruvate can be formed from malate by malate dehydrogenase and malic enzyme.It has been shown that in the posterior division of the silk gland of fifth instar larvae of Philosamia Cynthia ricini malate dehydrogenase is present. In the midgut, besides malate dehydrogenase, malic enzyme was also found. Both enzymes specifically require NADP as eoenzyme. By the action of these two enzymes the malic acid from the leaves could be transformed into pyruvate and oxaloacetate, the latter forming also pyruvate through enzymatic as well as nonenzymatic decarboxylation.In Bonibyx mori, malate dehydrogenase was observed in the fat body and posterior division of the silk gland in the fifth stadium. In the midgut, malic enzyme could also be found in addition to malate dehydrogenase. The activities of both enzymes are rather high.The enzymatic reduction of malic acid in the body fluid and posterior division of the silk gland of fifth instar larvae was compared with normal Bombyx mori and those affected by jaundice. The jaundiced worms showed much lower enzymatic activity than the normal ones, especially in the body fluid.

蓖麻叶及桑叶中含有丰富的苹果酸,在蚕的体液、丝腺及中肠等组织中氧化苹果酸的能力相当强,使苹果酸形成OAA或PYR。 我们测得蓖麻蚕及丝腺中有NADP专一的MDH。在中肠内以MDH为主,同时能测到ME活力。以延胡索酸为底物,可以观察到NADP被还原。通过这些酶的作用,可将叶中的苹果酸形成PYR。

 
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