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值保持
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  value drop
     The results showed that the optimal temperature and pH value required to remove hydrogen sulfide were 25-40℃ and pH=6.0-7.5,correspondingly the hydrogen sulfide removal efficiency greater than 90% if inlet H_2S concentration was below 6×10~(-5) mg/L,and pH value drop was insignificant in this fixed bed.
     结果表明当进气口的质量浓度低于6×10-5mg/L、25~40℃、pH值在6.0~7.5范围时,生物固定床对废气中H2S的脱除率可达90%以上,在反应过程中pH值保持不变;
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  “值保持”译为未确定词的双语例句
     For the male subjects,BMD in the 40 to 49-year-old group was obviously higher than that in the 30 to 39-year-old group(t=2.89,P< 0.01),and it was the lowest when they were 50 to 59 years old(t=4.68,P< 0.01),and their BMD at left hip kept stable after 70 years old.
     而男性40~49岁时骨密度明显高于30~39岁时(t=2.89,P<0.01),50~59岁时骨密度最低(t=4.68,P<0.01),70岁以后男性左髋骨密度值保持稳定。
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     The pixel value was kept relatively constant with air kerma of 4.0 μGy/frame and increased with air kerma of 1.1 μGy/frame when X-ray tube voltage was increased.
     当比释动能为 4.0 μGy/帧时 ,随着管电压的增加 ,像素值保持相对的恒定 ,而当比释动能为 1.1μGy/帧时 ,像素值却逐渐增加。
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     the hardness of the films are all above 25GPa, when the voltage is -150V, we get the maximum 27. 5GPa;
     硬度值保持在25GPa以上,在偏压为-150V时硬度最大,为27.5GPa;
     When the concentration of acid or alkali in the suspension system is moderate(pH=4~11),the Cu~(2+)-montmorillonite displays buffer action,and the pH value maintains 4.76.
     悬浮体系酸、碱浓度适中时(pH=4~11),Cu2+-膨润土表现出对酸、碱的缓冲作用,pH值保持在4.76左右。
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     In this paper,we show that every linear mapping φ of weighted (B,C) preserving kernel into range on a standard operator algebra A (I∈A) with continuity in weak operator topology is of the form φ(T)=ATB+CTD (T∈A) for some A and B in B(X).
     在给出加权(B,C)的核值保持映射定义的基础上,证明每个含单位元的标准算子代数上的弱算子拓扑连续的加权(B,C)的核值保持映射有如下形式φ(T)=ATB+CTD,其中A,D∈B(X).
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     value remained constant.
     保持不变。
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     Linear maps of right *-preserving kernel into range on B(H)
     B(H)上的右*-核保持映射
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     Keeping In Touch
     保持联系
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     value (number of fundamental) being 44. The chromosome number and karyotype of A.
     为 44。
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     Estimation of i-Value
     i-估计
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  value drop
Salinities ranged from 17.6 in August to 1.1 in November, but only at two lock stations during November and December did value drop below 5, which is regarded as the lethal limit for the larvae of this euryhaline teredinid species.
      
The course of the reaction was studied by removing a sample at intervals corresponding to a small iodine value drop, and constituents were determined analytically.
      
A hydrogenated oil with an approximate iodine value drop of 25 was attained by regulating the conditions and size of the reactor.
      
Data on value drop and incumbent share constructed from the CRSP.
      


The complex ion formed by Pb~(++) and N_2H_4 was studied palarographically. It was found that in a N_2H_4—N_2H_5ClO_4 buffer, with pH=7, [Pb~(++)]=5×10~(-4)M, [N_2H_4]=0.70—2.3M only one complex ion with N_2H_4:Pb=1:1 exists in salution. The formation constant of this complex ion at 30℃ is 90. Above pH=7.5 Pb precipitates out from the solution probably due to formation of basic salts.

本文研究了在肼底液中铅的极谱性质。在N_2H_4—N_2H_5ClO_4缓冲溶液(pH=7)中,当[Pb~(++)]=5.00×10~(-4)M,[N_2H_4]+0.7—2.3M时,Pb~(++)与N_2H_4生成一种不稳定的络离子:Pb~(++)+N_2H_4→Pb(N_2H_4)~(++)30℃时,其生成常数为90,铅肼络离子的还原过程是可逆的,n=2,E_(1/2)决定於溶液中N_2H_4的浓度。当溶液的pH值保持在7.00而[N_2H_4]低於0.7M或[N_2H_4]高於0.7M而pH值增至7.5以上时,铅就从溶液中沉淀出来.

The molar refraction of chelate compounds Co~(II),Co~(III),Ni~(II),Cu~(II)-EDTA was de-termined by the measurement of the refractive index of these salts.The ionicrefraction of chelate ions Co~(II)Y~(2-).Co~(III)Y~(-).Cu~(II)Y~(2-).Ni~(II)Y~(2-) was calculated inaccordance with the additivity of the ionic refraction by the molar refraction.Theresults show that:1.The ionic refraction of a definite chelate ion in different crystalline compoundsremains constant,which indicates that the mutual polarization between...

The molar refraction of chelate compounds Co~(II),Co~(III),Ni~(II),Cu~(II)-EDTA was de-termined by the measurement of the refractive index of these salts.The ionicrefraction of chelate ions Co~(II)Y~(2-).Co~(III)Y~(-).Cu~(II)Y~(2-).Ni~(II)Y~(2-) was calculated inaccordance with the additivity of the ionic refraction by the molar refraction.Theresults show that:1.The ionic refraction of a definite chelate ion in different crystalline compoundsremains constant,which indicates that the mutual polarization between ions isinsignificant.It is possible to study the structure of such crystals by the refractionmethod.2.The fact that the values of ionic refraction of Co~(II)Y~(2-) and Co~(III)Y~(-) obtainedfrom three alkali metal salts of Co~(II)Y~(2-) ions and four alkali metal salts of Co~(III)Y~(-)ions are the same (69.6cm~3),but considerably different from those of Ni~(II)Y(2-) andCu~(II)Y~(2-) (64.5cm~3) indicates that Co~(II)Y~(2-) possesses a hexadentate structure similar tothat of Co~(III)Y~(-) but different from the pentadentate structures of Ni~(II)Y~(2-) and Cu~(II)Y~(2-).3.The refraction of chelate ions depends upon the changes of the structure of theions markedly,but is almost independent of the electron numbers of the centralcation.

通过测定Co~Ⅱ、Co~Ⅲ、Ni~Ⅱ、Cu~Ⅱ-EDTA螯合物的折射率得到各盐的克分子折射度,并根据离子折射度的加合性算出螯合离子Co~ⅡY~(2-)、Co~ⅢY~-、Ni~ⅡY~(2-)、Cu~ⅡY~(2-)的离子折射度,结果表明:1.同一种螯合离子在不同晶体中,其离子折射度值保持常数,说明离子间的极化是不显著的,因而用折射度法研究它们的结构是可能的。2.从三个Co~ⅡY~(2-)和四个Co~ⅢY~-的碱金属盐得到这两种螯合离子的折射度是相同的(69.6厘米~3),与Ni~ⅡY~(2-)和Cu~ⅡY~(2-)的折射度(64.5厘米~3)相差很大,说明Co~ⅡY~(2-)具有和Co~ⅢY~-相似的六啮结构,而不同于Ni~Y~(2-)和Cu~ⅡY~(2-)的五啮结构。3.螯合离子结构改变引起折射度显著地变化,而中心阳离子的电子数改变对整个螯合离子折射度的影响很小。

The effects of added respiratory resistance on breathing and respiratory discomfort were studied in 33 healthy young men both at rest and during light exercise (bicycle ergometer, 250 kg.m/min). A total of 13 combinations of different ratios of inspiratory resistance (IR) to expiratory resistance (ER) were tested.It was found that, with fixed total resistance value, the physiological and psychological burden of the combined resistance was closely related to the ratio of IR and ER. When IR = ER, the combined...

The effects of added respiratory resistance on breathing and respiratory discomfort were studied in 33 healthy young men both at rest and during light exercise (bicycle ergometer, 250 kg.m/min). A total of 13 combinations of different ratios of inspiratory resistance (IR) to expiratory resistance (ER) were tested.It was found that, with fixed total resistance value, the physiological and psychological burden of the combined resistance was closely related to the ratio of IR and ER. When IR = ER, the combined resistance yielded most significant burden, while burden was less marked when IR>ER, and least marked when IR

以33名健康男性青年为对象,比较了吸气阻力(IR)与呼气阻力(ER)按不同比例匹配所组成的13种外加联合阻力(CR)对呼吸及呼吸不适感觉等的影响。实验分别在静坐及轻度体力负荷(自行车功量计,250kg·m/min~(-1))条件下进行。 结果表明:在总阻力值保持一定的条件下,CR的生理、心理影响与IR与ER的比例有关,以IR=ER匹配的影响最重,IR>ER次之,IR

 
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