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rapid decomposition
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  快速分解
     The experimental measurement method was Dynamic Light Scattering. Chromium came from the rapid decomposition of chromium hexacarbonyl (Cr(CO)6) in room temperature and was carried into the combustion chamber by hydrogen.
     实验研究运用动态光散射技术,并由Cr(CO)6在室温下快速分解产生铬,跟随燃料氢一起进入燃烧室。
短句来源
     In the processing methods of seismic data based on wave equations such as implicit methods of modeling of seismic wave field and prestack migration, the rapid decomposition of Laplacian or Helmholtz operator is the key to complete these methods.
     在基于波动方程的地震数据处理如地震波场模拟和叠前深度偏移等隐式方法中 ,拉普拉氏算子或亥姆霍兹算子的快速分解是这些方法能否实现的关键 .
短句来源
     The absolute speed should be stressed first, the speed endurance second ,and the training method is up to physiological and biochemical rule, i. e mainly developing the energy supply ability of Adenosine Triphoshate (ATP) rapid decomposition and Creative Phosphate(CP) resynthesis is the key to improve dash performance .
     认为短跑运动员重视发展绝对速度并相应发展速度耐力的训练方法是符合生理生化规律的 ,即主要发展三磷酸腺苷 (ATP)快速分解和磷酸肌酸 (CP)再合成的供能能力 ,是提高短跑运动成绩的关键 .
短句来源
     The activity of invertase decreased by 95% and of urease and cellulase by more than 70% in the incipient stage of rapid decomposition, and finally reached a relatively lower level. This can be considered as a quantitative biochemical index that reflects the maturity of the compost.
     在堆肥快速分解阶段,转化酶活性下降95%,脲酶、纤维素酶活性下降70%以上,且稳定维持在较低水平,以此可作为判定猪粪堆制过程中腐熟程度的定量生化指标。
短句来源
  迅速分解
     The rapid decomposition of titanium trichloride catalyst for propylene polymerization un-der atmospheric condition has brought serious difficulty in studying this kind of samples by scanning electron microscope.
     由于三氯化钛聚丙烯催化剂在大气条件下会迅速分解,因此给扫描电镜观察此类样品带来了困难。
短句来源
     Laboratory study discovered that CO\-2 and other gases generated from rapid decomposition of initiating agent under high temperature could expand steam sweep area, reduce oil viscosity, and improve steam injection efficiency.
     根据室内研究 ,在高温下引发剂迅速分解产生的CO2 等气体 ,能扩大蒸汽扫油面积 ,降低原油粘度 ,提高注汽效果。
短句来源
  “rapid decomposition”译为未确定词的双语例句
     At 0℃ fruit firmness drop was effectively delayed at the rapid losing of stage. 2. Rapid decomposition of starch with increasing of amylase activity is the chief reason of fruit softening at the first stage, fruit firmness losing is positively correlated with starch degradation (r=0.99);
     2.淀粉酶活性上升而导致淀粉的迅速水解是造成第一阶段软化的主要原因,淀粉含量下降与果实硬度下降呈正相关(r=0.99),淀粉酶是此阶段的专一酶;
短句来源
     A more rapid decomposition rate of PCP is observed oncopper-loaded GAC with larger amount of intermediates formed.
     在载铜活性炭上,五氯酚的分解速率更快,但产生的中间产物稍多一些。
短句来源
     The influence to central nervous system can be reduced, with rapid decomposition and enough metabolism of the alcohol ingested in the body full of the two enzymes.
     若ADH及ALDH在人体内均充分具备,则能较快得分解乙醇,减少究竟对中枢神经的影响,因而即使摄入一定量的乙醇,其所含有的乙醇也能在很短时间内得到充分的代谢。
短句来源
     Rapid decomposition ofsilicate glass is achived in a specially designed sealed vessel made of polytetrafluoro-ethylene to avoid contamination and the possible oxidation of sample in hydrofluoricacid at 110℃.
     分解硅酸盐玻璃样品是在专门设计的聚四氟乙烯密封的容器中进行. 在此系统中,110℃下用氢氟酸分解样品可避免样品氧化和沾污.
短句来源
     A high temperature and aboundant precipitation willresult in rapid decomposition.
     气温的增高和降水量的增大都有利于凋落的分解。
短句来源
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  rapid decomposition
Thermal plasma processes applied to environmental problems have the features of high temperature, high activity and rapid decomposition rate, so it can perfectly decompose non-decomposed materials like CF4 to a high degree.
      
The sharp decrease in the rate of chloridization of nickel at temperatures above 250 °C is attributed to the rapid decomposition of molten ferric chloride hydrate (FeCl3 · 3H2O), which blocks the pores of the reactant solid.
      
A mechanism for this rapid decomposition of the beta-phase has been proposed.
      
A failure mechanism for elastohydrodynamic films based on rapid decomposition of mineral and synthetic oils involving chemical reaction between entrapped oil and the containing surfaces is proposed.
      
At elevated temperatures, the solid-state decomposition of 2c and 4c followed biphasic kinetics, with rapid decomposition occurring initially.
      
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The materials of present report were collected from reconnaissence soil survey of Kwangtung and Kwangsi provinces in 1958—1960. Soils investigated include yellow earths, red earths and lateritic soils. They are developed under natural vegetations of tropic monsoon forest (secondary), subtropic evergreen broadleaf forest, conifer and broadleaf mixed forest, subalpine dwarfing and bamboo ferests, confer forests of Cunninghamia lanceolata and Pinus massoniana, and grass land. A few samples of rice paddy soil were...

The materials of present report were collected from reconnaissence soil survey of Kwangtung and Kwangsi provinces in 1958—1960. Soils investigated include yellow earths, red earths and lateritic soils. They are developed under natural vegetations of tropic monsoon forest (secondary), subtropic evergreen broadleaf forest, conifer and broadleaf mixed forest, subalpine dwarfing and bamboo ferests, confer forests of Cunninghamia lanceolata and Pinus massoniana, and grass land. A few samples of rice paddy soil were also studied for comparison. Laboratory investigations invplved the determination of chemical composition of forest litters, fraction of soil humus (after Turin and Kononova), and analysis of soil exchangeable bases, active iron and alumina, etc. From the results obtained the writers come to the following conclusions: 1. The ratios of humic acid over fulvic acid under natural vegetations are usually less than 1. Fulvic acid prevails in acid soils of tropic and subtropic regions with the presence of active iron and alumina. On the contrary, intensively cukivated paddy soils of neutral to slightly alkaline reaction in the same areas, after a long-time application of lime and manures, give a humic acid over fulvic acid ratio of about 2. 2. Active soil humus, including humic and fulvic acid extractable by 0.1 N NaOH (Fraction Ⅰ), also predominates in soil organic matter. The ratio of soil humus "Fraction 1" over "Fraction Ⅱ, including humic acid and fulvic acid only soluble through repeatedly extraction by 0.1 N H_2SO_4 and NaOH", ranges from 5:1 to 10:1. 3. Soils developed under natural vegetations contain 20—35% of readily soluble humus {extractable by 0.05 N H_2SO_4) in total organic matter. Rice paddy soils in the same area usually contain readily soluble humus less than 5%. It appears that under present agricultural practices, the more active forms of soil humus undergo rapid decomposition, and the maintenance of soil fertility is largely dependded on manures and nitrogenous fertilizers. 4. Soils of the investigeted areas contain 40—50% humin (residual organic matter resistant 1.0 acid and alkaline extraction) in total organic matter. 5. Soil litters of conifer forest of Cunninghamia lanceolate contain CaO+Mg+K_2O+Na_2O up to 59.51% and SiO_2 10.57% in the ash. Litters of bamboo forest contain CaO+MgO+K_2O+ Na_2O 8.87% and SiO_2 up to 78.21% in the ash. Litters of Pine massoniana contain CaO+MgO + K_2O+Na_2O 11.18% and a very high content of A1_2O_3 (13.91%). The present data, however, give no correlation between the chemical composition of soil litter and that of soil exchangeable bases. Soils under Pine massoniana contain relatively greater amounts of exchangeable alumina (4—16 m.e./100 gm. of soil) and active iron (65—200 m.e./100 gm. of soil) in surface layer.

本文对华南地区不同植被下的土壤有机貭、土壤活性矿物貭組成及枯枝落叶层进行了研究,企图探求植被类型对于土壤腐殖貭組成以及肥力变化的影响。供試土壤包括山地草甸土、黃壤、紅壤及砖紅壤性紅壤,由不同母貭发育而成。植被类型包括常綠闊叶林、針叶闊叶混交林、高山矮林及竹林、杉木林、馬尾松灌丛、草坡等。此外,还选了三个珠江三角洲地区不同肥力的水稻土,以比較自然植被下土壤性貭和农田土壤性貭的异同。根据初步研究結果,获得下列几点认識。 1.土壤活性腐殖质的变化两广地区自然植被下的土壤,其活性腐殖貭占土壤有机貭总量的百分比显然高于农田土壤。森林及以禾本科为主的中生性草地下的土壤,表土有机貭中合有約20—35%的活性腐殖貭(为0.1 N NaOH所能提取),但是水稻土中,通常只占6%以下。这点說明了在热带和亚热带地区的生物气候条件下,一年2—3造的耕作制度,可使結构比較簡单的活性腐殖貭很快的被矿化,而土壤肥力的維持在很大程度上依賴于有机肥料和化学肥料的逐年补給。 2.土壤中胡敏酸与富里酸的比率华南自然植被下的土壤有机貭中,胡敏酸与富里酸的比率通常小于1,紅壤地区土壤中富里酸比胡敏酸高的特点,是由于富里酸能在酸性溶液中和活性R_2O_...

本文对华南地区不同植被下的土壤有机貭、土壤活性矿物貭組成及枯枝落叶层进行了研究,企图探求植被类型对于土壤腐殖貭組成以及肥力变化的影响。供試土壤包括山地草甸土、黃壤、紅壤及砖紅壤性紅壤,由不同母貭发育而成。植被类型包括常綠闊叶林、針叶闊叶混交林、高山矮林及竹林、杉木林、馬尾松灌丛、草坡等。此外,还选了三个珠江三角洲地区不同肥力的水稻土,以比較自然植被下土壤性貭和农田土壤性貭的异同。根据初步研究結果,获得下列几点认識。 1.土壤活性腐殖质的变化两广地区自然植被下的土壤,其活性腐殖貭占土壤有机貭总量的百分比显然高于农田土壤。森林及以禾本科为主的中生性草地下的土壤,表土有机貭中合有約20—35%的活性腐殖貭(为0.1 N NaOH所能提取),但是水稻土中,通常只占6%以下。这点說明了在热带和亚热带地区的生物气候条件下,一年2—3造的耕作制度,可使結构比較簡单的活性腐殖貭很快的被矿化,而土壤肥力的維持在很大程度上依賴于有机肥料和化学肥料的逐年补給。 2.土壤中胡敏酸与富里酸的比率华南自然植被下的土壤有机貭中,胡敏酸与富里酸的比率通常小于1,紅壤地区土壤中富里酸比胡敏酸高的特点,是由于富里酸能在酸性溶液中和活性R_2O_3相結合(特別是活性鉄),这項特性在邱林、科諾諾娃、波諾馬列娃等人的研究中早已証明了。珠江三角洲上的高度熟化水稻土(土壤pH7.8),由于长期施用有机肥料及石灰的影响,有机貭中胡敏酸的数量高出富里酸一倍,胡敏酸与富里酸的比率为1.95。但是在新垦的紅壤性水稻土中(土壤pH4.5),这項比率是0.39,这点也可以証明有机貭分解过程和富里酸的形成是和土壤酸度及活性鉄、鋁有关的。 3.活性铁和鋁与腐殖质組成的关系本区一般森林及草本植被下的土壤,表土活性鋁的合量通常为每百克土4—10毫克当量,活性鉄为20—100毫克当量;馬尾松灌丛下的紅壤,活性鋁的含量每百克土可达20毫克当量左右。这些土壤的盐基飽和度一般在20—30%之間,每百克土的代換性鈣通常仅在1—2毫克当量上下,但是土壤有机貭分組分析結果,第一組腐殖貭(包括活性較強的胡敏酸和富里酸)的含量远远超过了第二組腐殖貭(指由酸液和碱液反复提取以后能溶解的部分),它們的比率为5:1和10:1(只有一个例外)。这項結果說明土壤中大量活性鋁离子和鉄离子的存在,使腐殖貭的活度增強。在珠江三角洲水稻土中,第一組腐殖貭和第二組腐殖貭的比例也在这个范围內。 4.土壤腐殖貭中的不溶性殘渣(胡敏素)的含量在表土中所有供試土壤都很一致,約占土壤腐殖貭总量的40—50%上下。植被类型、海拔高度、耕作过程、成土母质等对于胡敏素的合量,均沒有明显的影响。这样在热带和亚热带土壤的腐殖貭中,似乎有一半是胡敏素,它在短期內是不能矿化的。 5.土壤腐殖貭中的碳氮比率(C/N) 森林及草本植被下的表土腐殖貭中,其C/N比率通常在10—15左右,只有馬尾松灌丛下的紅壤,C/N比率为19.6。在这个地区的水稻土中C/N比率一般为9—11。耕作縮小了C/N比率,但是自然植被下有机貭中活性腐殖貭的含量,都远远地超过农田土壤,因此,碳氮比率的縮小,很难认为土壤有机貭中氮素有效性的提高。这在国內外的研究材料中也指出过,例如合胡敏素极高的泥炭和褐煤,其C/N比率可以在10以下。 6.不同植被下殘落物的灰分組成杉木林的殘落物合有最高的基性物貭,CaO+MgO+K_2O+Na_2O的总量占灰分的59.51%;竹林和馬尾松灌丛的殘落物合基性物貭最低,前者为8.87%,后者为11.18%(都是CaO、MgO、K_2O、Na_2O的总量)。竹林殘落物的灰分中含SiO_2高达78.21%,而杉木林的殘落物灰分中含SiO_2量最低,为10.57%。馬尾松灌丛及亚热带針闊叶混交林下的殘落物灰分中含Al_2O_3高于其他植被的殘落物,为13.91%5及12.86%。其他一般的常綠闊叶林、針闊叶混交林和亚高山矮林等殘落物灰分中的基性物貭总量均在30%左右。虽然不同植被类型地表殘落物的矿貭組成有明显的差异,但就現在的初步材料,远远不足以闡明这項差异在生物物貭循环过程中的作用。这些成分上的变化,对于土壤活性矿物貭很少有直接的相关性。只有馬尾松灌丛下的紅壤,其活性鋁含量高于一般土壤,这点可能是受了殘落物貭腐解体的影响。我們初步接触了华南地区的植被类型、土壤腐殖貭組成和活性矿物貭間相互关系的問題以后,觉得波雷諾夫所启示我們的生物地球化学的研究方向,在这一地区中有許多工作可以推进。这項研究方法如果进一步地应用于农田土壤中的輪作方式及耕作措施对于土壤肥力消长关系的研究,便可以把森林和草地土壤以及农田土壤的生成发育方向做出具体的比較。此外,我們感到,尽管邱林、科諾諾娃和瓦克斯曼(Waksman,S.A.)等近三十年来在土壤有机貭的研究上做了很多工作,但是目下的有机貭分級方法应用于热带及亚热带的土壤(特别是水稻土)的适应性还值得研究。至于胡敏酸、富里酸等在土壤中与活性矿物貭的結合情况,以及各种腐殖貭物貭对于土壤肥力及植物营养上的作用,更是一个急待进一步研究的問題。

A new technique combining ion-exchange membrane with potentiometric titrationwas used to determine microquantity of Ce~(4+) in silicate glass.It extends conventionalpotentiometric titration to microquantitalive determination.The derermination can becarried out at 10~(-6) N concentration,and the lower limit is down to 1 μg.This methodis simple and rapid,and the average deviation is less than 1%.Rapid decomposition ofsilicate glass is achived in a specially designed sealed vessel made of polytetrafluoro-ethylene...

A new technique combining ion-exchange membrane with potentiometric titrationwas used to determine microquantity of Ce~(4+) in silicate glass.It extends conventionalpotentiometric titration to microquantitalive determination.The derermination can becarried out at 10~(-6) N concentration,and the lower limit is down to 1 μg.This methodis simple and rapid,and the average deviation is less than 1%.Rapid decomposition ofsilicate glass is achived in a specially designed sealed vessel made of polytetrafluoro-ethylene to avoid contamination and the possible oxidation of sample in hydrofluoricacid at 110℃.

本文提出了一项把离子交换膜应用于电位滴定的新技术.它把常规电位滴定扩展到微量测定的范围.文中测定了硅酸盐玻璃中微量的四价铈,它可以在10~(-6) N 的低浓度下进行测定,测定下限低达0. 1μg.此法设备简单,操作方便,迅速.分解硅酸盐玻璃样品是在专门设计的聚四氟乙烯密封的容器中进行.在此系统中,110℃下用氢氟酸分解样品可避免样品氧化和沾污.

The contents of pigment, sugar, titratable acid, pH value and respi-ratory rate in fruits of white honey-peach "Yu Lu" and yellow peach "Elberta" were determined during the period of development until full ripeness. Rapid decomposition of chlorophyll and the production of car-otenoid are responsible for the disappearance of green color and the ma-nifestation of yellow color in the ripening process of yellow peach frui-ts. In white peach fruits only small quantity of carotenoid was synthesi-zed.

黄桃果实生长期是以叶绿素为主,成熟时叶绿素完全分解,类胡萝卜素急剧增多;绿色消失,而呈现黄色。吸收光谱、纸层析图谱和盐酸甲醇变色反应,一致表明黄桃不同品种(品系)成熟期,类胡萝卜素的主要组分相同;果实颜色的深浅与类胡萝卜的总量呈直线回归,与类胡萝卜素的各个组分的含量,无直线回归关系。

 
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