我们矢志于为追求精致英译的翻译员助上一臂之力。集千万句库为你所用，借万千智慧任尔调配，通译句典——为攀登翻译高峰另辟蹊径！
双语句库分类列表：
化学:化学习题:
To examine the interactions between the enzyme lysozyme and the Fab portion of the antilysozyme antibody, go to the Protein Data Bank Website.
考查溶菌酶与抗溶菌酶的抗体的Fab部分的相互作用,去Protein Data Bank Website。
属类：化学及生命科学-化学-化学习题
Which chains in the three-dimensional model correspond to the antibody fragment and which correspond to the antigen, lysozyme?
在三维模型中，哪些链对应抗体片段，哪些对应于抗原，溶菌酶?
属类：化学及生命科学-化学-化学习题
What secondary structure predominates in this Fab fragment?
Fab片段中的主要二级结构是什么?
属类：化学及生命科学-化学-化学习题
How many amino acid residues are in the heavy and light chains of the Fab fragment and in lysozyme?
Fab片段的重链和轻链由多少个氨基酸残基组成，溶菌酶由多少个氨基酸残基组成?
属类：化学及生命科学-化学-化学习题
Estimate the percentage of the lysozyme that interacts with the antigen-binding site of the antibody fragment.
估算与抗体片段的抗原结合位点结合的溶菌酶的比例。
属类：化学及生命科学-化学-化学习题
Identify the specific amino acid residues in lysozyme and in the variable regions of the heavy and light chains that appear to be situated at the antigen-antibody interface. Are the residues contiguous in the primary sequence of the polypeptide chain?
找出溶菌酶及重链和轻链可变区中位于抗原-抗体界面的特异的氨基酸残基。这些残基在多肽链的一级结构上是连续的吗?
属类：化学及生命科学-化学-化学习题
An unknown substance containing only C, H, and O was isolated from goose liver.
从鹅肝脏中分离出的一种只含C,H和O的未知物质。
属类：化学及生命科学-化学-化学习题
A 0.423 g sample produced 0.620 g of CO2 and 0.254 g of H2O after complete combustion in excess oxygen. Is the empirical formula of this substance consistent with its being a carbohydrate?
在过量氧的存在下，0.423克样品完全燃烧产生0.620g的CO2和0.254g的H2O，这种物质的实验式与碳水化合物一致吗?
属类：化学及生命科学-化学-化学习题
In the monosaccharide derivatives known as sugar alcohols, the carbonyl oxygen is reduced to a hydroxyl group. For example D-glyceraldehyde can be reduced to glycerol. However, this sugar alcohol is no longer designated D or L
在单糖衍生为糖醇中，羰基氧还原为羟基。例如D-甘油醛可以还原为甘油，此糖醇不在标记为D或L
属类：化学及生命科学-化学-化学习题
Many carbohydrates react with phenylhydrazine (C6H5NHNH2)to form bright yellow crystalline derivatives known as osazones
许多碳水化合物可以与苯肼反应形成鲜黄色的晶体衍生物称为苯脎。
属类：化学及生命科学-化学-化学习题
The melting temperatures of these derivatives are easily determined and are characteristic for each osazone.
这些衍生物的熔点温度很容易确定，而且对每一种(苯脎)衍生物是特征性的。
属类：化学及生命科学-化学-化学习题
As the table shows, certain pairs of derivatives have the same melting points, although the underivatized monosaccharides do not. Why do glucose and mannose, and galactose and talose form osazone derivatives with the same melting points?
如表中所示，某些衍生物对有相同的熔点，尽管未衍生的单糖的熔点却不相同。为什么葡萄糖和甘露糖;半乳糖和塔烙糖形成的osazone衍生物有相同的熔点?
属类：化学及生命科学-化学-化学习题
A solution of one stereoisomer of a given monosaccharide rotates plane-polarized light to the left (counterclockwise)and is called the levorotatory isomer, designated (-)
一特定单糖的一种立体异构体溶液使平面偏振光向左旋转(反时针)称为左旋，标记为(-)
属类：化学及生命科学-化学-化学习题
the other stereoisomer rotates plane-polarized light to the same extent but to the right (clockwise)and is called the dextrorotatory isomer, designated (+).
另一立体异构体使平面偏振光向右旋转(顺时针)称为右旋，标记为(+)。
属类：化学及生命科学-化学-化学习题
An equimolar mixture of the (+)and (-)forms does not rotate plane-polarized light.
等摩尔的(+)和(-)形式的混合物不能使偏振光旋转。
属类：化学及生命科学-化学-化学习题
The optical activity of a stereoisomer is expressed quantitatively by its optical rotation, The specific rotation [α]D25C of an optically active compound is defined thus
立体异构体的光学活性是以旋光度定量表示的，光学活性物质的比旋光度[α]D25C是这样定义的
属类：化学及生命科学-化学-化学习题
The temperature and the wavelength of the light employed (usually the D line of sodium, 589nm)must be specified in the definition.
在定义中必须指定温度和使用的光的波长(通常是钠D线，589nm)。
属类：化学及生命科学-化学-化学习题
A freshly prepared solution of α-D-galactose (1g/mL in a 10 cm cell)shows an optical rotation of +150.7o Over time, the observed rotation of the solution gradually decreases and reaches an equilibrium value of +80.2°.
一新制的α-D-半乳糖溶液(1g/mL，光径为10cm)表现+150.7o的旋光度。随时间的推移，观察到此溶液的旋光度逐渐降低，达到平衡时为+80.2°。
属类：化学及生命科学-化学-化学习题
In contrast, a freshly prepared solution (1 g/mL)of β-D-galactose shows an optical rotation of only +52.8°. Moreover, the rotation increases over time to an equilibrium value of +80.2°, identical to that reached by α-D-galactose.
相反，一新制的β-D-半乳糖溶液(1g/mL)表现+52.8o的旋光度,但其旋光度随时间的推移逐渐增加到平衡的+80.2°。这与α-D-半乳糖达到平衡时的值一样。
属类：化学及生命科学-化学-化学习题
Draw the Haworth perspective formulas of the and β forms of D-galactose. What feature distinguishes the two forms?
画出α-D-半乳糖和β-D-半乳糖的Haworth透视式。什么特征可区别这两种形式?
属类：化学及生命科学-化学-化学习题
| 1 | 考查溶菌酶与抗溶菌酶的抗体的Fab部分的相互作用,去Protein Data Bank Website。 | To examine the interactions between the enzyme lysozyme and the Fab portion of the antilysozyme antibody, go to the Protein Data Bank Website. |
|
| 2 | 在三维模型中，哪些链对应抗体片段，哪些对应于抗原，溶菌酶? | Which chains in the three-dimensional model correspond to the antibody fragment and which correspond to the antigen, lysozyme? |
|
| 3 | Fab片段中的主要二级结构是什么? | What secondary structure predominates in this Fab fragment? |
|
| 4 | Fab片段的重链和轻链由多少个氨基酸残基组成，溶菌酶由多少个氨基酸残基组成? | How many amino acid residues are in the heavy and light chains of the Fab fragment and in lysozyme? |
|
| 5 | 估算与抗体片段的抗原结合位点结合的溶菌酶的比例。 | Estimate the percentage of the lysozyme that interacts with the antigen-binding site of the antibody fragment. |
|
| 6 | 找出溶菌酶及重链和轻链可变区中位于抗原-抗体界面的特异的氨基酸残基。这些残基在多肽链的一级结构上是连续的吗? | Identify the specific amino acid residues in lysozyme and in the variable regions of the heavy and light chains that appear to be situated at the antigen-antibody interface. Are the residues contiguous in the primary sequence of the polypeptide chain? |
|
| 7 | 从鹅肝脏中分离出的一种只含C,H和O的未知物质。 | An unknown substance containing only C, H, and O was isolated from goose liver. |
|
| 8 | 在过量氧的存在下，0.423克样品完全燃烧产生0.620g的CO2和0.254g的H2O，这种物质的实验式与碳水化合物一致吗? | A 0.423 g sample produced 0.620 g of CO2 and 0.254 g of H2O after complete combustion in excess oxygen. Is the empirical formula of this substance consistent with its being a carbohydrate? |
|
| 9 | 在单糖衍生为糖醇中，羰基氧还原为羟基。例如D-甘油醛可以还原为甘油，此糖醇不在标记为D或L | In the monosaccharide derivatives known as sugar alcohols, the carbonyl oxygen is reduced to a hydroxyl group. For example D-glyceraldehyde can be reduced to glycerol. However, this sugar alcohol is no longer designated D or L |
|
| 10 | 许多碳水化合物可以与苯肼反应形成鲜黄色的晶体衍生物称为苯脎。 | Many carbohydrates react with phenylhydrazine (C6H5NHNH2)to form bright yellow crystalline derivatives known as osazones |
|
| 11 | 这些衍生物的熔点温度很容易确定，而且对每一种(苯脎)衍生物是特征性的。 | The melting temperatures of these derivatives are easily determined and are characteristic for each osazone. |
|
| 12 | 如表中所示，某些衍生物对有相同的熔点，尽管未衍生的单糖的熔点却不相同。为什么葡萄糖和甘露糖;半乳糖和塔烙糖形成的osazone衍生物有相同的熔点? | As the table shows, certain pairs of derivatives have the same melting points, although the underivatized monosaccharides do not. Why do glucose and mannose, and galactose and talose form osazone derivatives with the same melting points? |
|
| 13 | 一特定单糖的一种立体异构体溶液使平面偏振光向左旋转(反时针)称为左旋，标记为(-) | A solution of one stereoisomer of a given monosaccharide rotates plane-polarized light to the left (counterclockwise)and is called the levorotatory isomer, designated (-) |
|
| 14 | 另一立体异构体使平面偏振光向右旋转(顺时针)称为右旋，标记为(+)。 | the other stereoisomer rotates plane-polarized light to the same extent but to the right (clockwise)and is called the dextrorotatory isomer, designated (+). |
|
| 15 | 等摩尔的(+)和(-)形式的混合物不能使偏振光旋转。 | An equimolar mixture of the (+)and (-)forms does not rotate plane-polarized light. |
|
| 16 | 立体异构体的光学活性是以旋光度定量表示的，光学活性物质的比旋光度[α]D25C是这样定义的 | The optical activity of a stereoisomer is expressed quantitatively by its optical rotation, The specific rotation [α]D25C of an optically active compound is defined thus |
|
| 17 | 在定义中必须指定温度和使用的光的波长(通常是钠D线，589nm)。 | The temperature and the wavelength of the light employed (usually the D line of sodium, 589nm)must be specified in the definition. |
|
| 18 | 一新制的α-D-半乳糖溶液(1g/mL，光径为10cm)表现+150.7o的旋光度。随时间的推移，观察到此溶液的旋光度逐渐降低，达到平衡时为+80.2°。 | A freshly prepared solution of α-D-galactose (1g/mL in a 10 cm cell)shows an optical rotation of +150.7o Over time, the observed rotation of the solution gradually decreases and reaches an equilibrium value of +80.2°. |
|
| 19 | 相反，一新制的β-D-半乳糖溶液(1g/mL)表现+52.8o的旋光度,但其旋光度随时间的推移逐渐增加到平衡的+80.2°。这与α-D-半乳糖达到平衡时的值一样。 | In contrast, a freshly prepared solution (1 g/mL)of β-D-galactose shows an optical rotation of only +52.8°. Moreover, the rotation increases over time to an equilibrium value of +80.2°, identical to that reached by α-D-galactose. |
|
| 20 | 画出α-D-半乳糖和β-D-半乳糖的Haworth透视式。什么特征可区别这两种形式? | Draw the Haworth perspective formulas of the and β forms of D-galactose. What feature distinguishes the two forms? |
|
查询记录
