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boron
相关语句
  
     Studies on Olefin Polymerization Catalyzed by Metallocene/Cocatalyst (Containing Boron Compound) Catalytic System
     茂金属/含化合物催化体系催化烯烃聚合的研究
短句来源
     Researches on Combustion and Processes of High Boron Content Boron-Based Fuel-Rich Solid Propellants
     高含富燃固体推进剂工艺和燃烧性能研究
短句来源
     Physiological Mechanisms of the High Boron Efficiency and Mapping of the High Boron Efficiency Genes in Brassica Napus
     甘蓝型油菜高效的生理基础及高效基因的定位
短句来源
     Studies on the Thermodynamics of the Systems Containing Boron and Lithium Li_2B_4O_7-H_2O, LiCl-Li_2B_4O_7-H_2O by Calorimetry
     含锂、水盐体系Li_2B_4O_7-H_2O、LiCl-Li_2B_4O_7-H_2O热力学性质的量热研究
短句来源
     Study on the Synthesis of Ceramics with Boron, Carbon, or Nitrogen by High Energy Ball Milling
     高能球磨法制备含、碳、氮陶瓷的研究
短句来源
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  硼的
     5.5%~18.3% and 1.4%~12.7% under boron treatment respectively.
     硼的脲酶抑制率为5.5%~18.3%,硝化抑制率为1.4%~12.7%;
短句来源
     The method has been applied to the determination of boron in natural water with relative standard deviation of 4.6%-6.4% and recovery of 102%-118%.
     方法用于天然水中硼的测定,回收率为102%~118%,相对标准偏差4.6%~6.4%。
短句来源
     The results by treatment with 25 ppm coumarin,25 ppm coumarin+5 ppm boron and 200 ppm IAA+5 ppm boron were similar to that of boron de- ficiency in the hypocotyls of Chinese fir.
     25ppm 香豆素、25ppm 香豆素+5ppm 硼和200ppm IAA+5ppm 硼处理的结果与缺硼的相似。
短句来源
     The method needn't a suppressor column,and the chromatographic conditions of separation and detection were modified. The detection limit was 5.0×10~(-5) mol/L,and the linear range was 0.2×10~(-3)~5.0×10~(-3) mol/L for boron,with RSD=2.0%(n=11).
     研究了硼的洗脱条件与分离条件,在最优条件下,硼的最低检出限为5.0×10-5mol/L,测定的线性范围为0.2×10-3~5.0×10-3mol/L,相对标准偏差RSD=2.0%(n=11)。
短句来源
     DFT method was performed on the series of NiC 2H 2,NiBC 2H 2,(NiB +1 )C 2H 2,NiB 2C 2H 2 molecules. It was found that the additional boron can abate reaction and improve activity and selectivity.
     用DFT方法对NiC2 H2 ,NiBC2 H2 ,(NiB+1)C2 H2 ,NiB2 C2 H2 进行高水平的量子化学计算 ,发现硼的加入可以缓和反应 ;
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  “boron”译为未确定词的双语例句
     Investigation on SiC/Si_3N_4 Bond Polycrystalline Diamond/cubic Boron Nitride Toughened with Y-ZrO_2
     Y-ZrO_2增韧SiC/Si_3N_4结合聚晶金刚石/立方氮化硼的研究
短句来源
     Research on Second-order Nonlinear Optic Properties and Electroluminescence of Cubic Boron Nitride
     立方氮化硼二阶非线性光学性质及电致发光的研究
短句来源
     REACTION OF 3β-ACETOXY-5β, 6β-EPOXIDE-6α-METHYL-25D SPIROSTANE (Ⅲ) WITH BORON TRIFLUORIDE ETHERATE
     3β-乙酰氧基-5β,6β-环氧-6α-甲基-25-D螺甾与三氟化硼的反应
短句来源
     ZSM-5 Zeolite Molecular Sieve Containing Boron
     含硼的ZSM-5沸石分子筛
短句来源
     ~(10)B Burnup Determination in Boron Stainless Steel Tube of Discharged Fuel Using Mass Spectrometer
     反应堆卸料硼钢管中~(10)B 燃耗质谱测定
短句来源
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  boron
However, electron-deficient boron-rich B-C-N solids have also attracted much interest both theoretically and experimentally.
      
Boron carbide (B4C) was selected as the additive for the modification of a phenol-formaldehyde (PF) resin, and the micro-structural evolution of the modified resin at high temperature was investigated.
      
Effects of boron-doping on the morphology and magnetic property of carbon nanotubes
      
Boron carbide nanotubes (nano-fibers) was prepared by B powder and carbon nanotubes (CNTs) at high temperature in a vacuumed quartz tube.
      
Two-component ultradispersed particles containing Fe and C were tested as magnetic adsorbents of boron phenylalanine and borax.
      
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Citrus in South China is affected with a highly destructive disease known as"Yellow shoot".The disease is most serious in the Chaoshan and the Yuehchungdistricts of Kwangtung Province and in the Changchow district of Fukien Province.It has been known in the Chaoshan district for over 70 years but has becomeepiphytotic only since about 30 years ago.During this period,millions of Citrustrees have been killed. Citrus trees may be affected in any age.The characteristic symptoms of thedisease are general yellowing...

Citrus in South China is affected with a highly destructive disease known as"Yellow shoot".The disease is most serious in the Chaoshan and the Yuehchungdistricts of Kwangtung Province and in the Changchow district of Fukien Province.It has been known in the Chaoshan district for over 70 years but has becomeepiphytotic only since about 30 years ago.During this period,millions of Citrustrees have been killed. Citrus trees may be affected in any age.The characteristic symptoms of thedisease are general yellowing of some of the nearly mature new shoots put out insummer,autumn,or early winter,dropping of the yellow leaves,and rotting ofrootlets.In addition to these general symptoms in the early stage,fasciculationof branches and malformation of leaves (abnormally large or deformed in variousways) often occur on Ponkan and Chiaokan (C.reticulata) and are particularlycommon on sweet orange.On affected sweet orange trees may also be seenshortening of internodes,resulting in bunchy growth of branches,and downwardas well as upright growth of shoots.In a later stage,the affected tree puts outnew shoots as usual but such shoots generally become chlorotic showing zinc ormanganese deficiency symptoms.The midrib and lateral veins as well as theadjoining tissues of part of the older leaves turn yellow.The midrib and largerveins may also become enlarged and corky and often split on dorsal side,showingnitrogen and boron deficiency symptoms.Affected trees blossom earlier and moreheavily than usual but bear few fruits.On badly affected trees fruits matureearlier but do not color well and are often deformed.Defoliation and root rottingbecome progressively serious as the disease advances.Young trees below 7 yearsof age generally are killed in 1 to 2 years or sooner.Nursery trees are killedeven more quickly.Older trees decline less rapidly but generally become unpro-ductive in about 2 years after the first symptoms appear. Nearly all the species and varieties of Citrus grown in the affected area aresusceptible.The order of degree of susceptibility is as follows: Ponkan,Chiaokan,Chachihkan,Lukan,Tungkan (all (C.reticulata),various varieties of sweet orange(C.sinensis),Hungninmeng (hybrid of C.lemon and C.rcticulata) Nienchu (C.rcticulata),Shangmayu (C.graudis) and Shihchichu (C.mitis). Studies of the cause of the disease will be reported in a later paper.

广东的潮汕区、新会县、番禺縣、广州市郊,福建的龍溪縣、福州市郊,和广西的柳城、融縣、兴業縣、郁林縣的柑桔类,都發生一种毁滅性的病害称为黄梢,或黄龍病。病区各种柑桔类的各品种一般都很易感染。其感病程度的次序大約如下:栟柑、蕉柑、茶枝柑、蘆柑、桶柑、各种甜橙、紅檸檬、年桔、桑麻柚及四季桔。用实生苗繁殖的福州紅桔及廣柑(橙),和福建龍溪的坪山柚及文旦柚,則未見發病。各齡的柑桔樹——自苗木至20齡以上的老樹——都能感染,一般以3—8齡的幼樹受害最烈?静〉闹饕钗跗诓糠中律业囊度烤然苹T谔鸪取薷毯徒陡躺嫌幸徊糠只苹蛘>G色的叶特别肥大或呈各种畸形狀态,有許多新梢簇生或束化。發病的枝条很快落叶。老枝上的叶有一部分亦黄化脫落。根系腐烂。至發病中期,新梢的叶多呈缺鋅或缺锰病狀,老叶呈缺氮及缺硼病狀,落叶及根腐更嚴重,开花早而多,結果少,部分枝条枯死。到后期,全株嚴重雕殘,終而枯死。本病在70—80年前在廣东潮汕区已有發现,但在近30年來始在各地蔓延成灾壳氨静≡诠愣鄙乔V州市郊及新会縣和福建龍溪縣已成为柑枯業發展的限制因素。

It was found in this investigation that boron exerted considerable influence

从实验结果证明,硼对珠光体的成核及成长是有影响的;在亚共析钢中硼促使珠光体的开始形成时间推迟,增长了珠光体成核的孕育期,但对成核率与时间的关系,在近于A_1温度(700℃)时,略为加速,而在珠光体转变速度最大的温度(650℃)时却没有影响。在共析钢中硼同样的使珠光体形成开始时间延迟,但对成核率与时间的关系没有改变,因此很可能硼促使奥氏体晶界能降低,珠光体得不到足够的能量成核,因而增加了奥氏作的稳定度。硼有加速珠光体成长率的作用,无论在亚共析或共析钢中皆有同样的现象产生。因此我们认为在珠光体形成温度范围内,硼虽使奥氏体转变开始时间推迟,但不影响转变终了时间的原因,是由于珠光体成长率加速所致。

Details are given for some kinds of nuclear emulsions which can be prepared by simple laboratory methods. The characteristics of these emulsions have been compared with Ilford nuclear emulsions. The properties of proton sensitive nuclear emulsions N-2, N-3 are about the same as. those of "Ilford C2". Nuclear emulsions for detecting thermal neutrons "N-2 loaded with boron or lithium" seem better than "Ilford C2 loaded with boron or lithium". The sensitivity of electron sensitive emulsion N-4 is of...

Details are given for some kinds of nuclear emulsions which can be prepared by simple laboratory methods. The characteristics of these emulsions have been compared with Ilford nuclear emulsions. The properties of proton sensitive nuclear emulsions N-2, N-3 are about the same as. those of "Ilford C2". Nuclear emulsions for detecting thermal neutrons "N-2 loaded with boron or lithium" seem better than "Ilford C2 loaded with boron or lithium". The sensitivity of electron sensitive emulsion N-4 is of the same order as that of emulsion "никфиP" and "Ilford G5". The hypersensitized electron sensitive emulsion N-5 is also discussed.

本文简述对质子、α粒子、裂片等灵敏的乳胶核—2、核—3,对所有带电粒子(包括电离本领为最小电离值的电子)灵敏的乳胶核—4、核—5和探测慢中子用的乳胶核—2载硼、核—2载锂的制备方法。鉴定了以上各种乳胶的主要性能并与目前世界水平的原子核乳胶(英国和苏联的乳胶)作了相应的比较。

 
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