求高手翻译成中文

Question

To achieve satisfactory signal-to-noise ratios, compounds should be present in high concentrations or localized in specific organs or organelles. Furthermore, their resonant frequencies should not be too close to that of water. Species that largely satisfy these criteria in fruit and vegetables include sugars and lipids, the distribution of lipid in pecan embryos being amongst the earliest MR images published. The (CH2)n resonance is about 3.5 ppm away from water, and patterns showing lipid distribution have been published. The earliest MR images published .for account, coffee , grape, groundnut, kiwifruit, olive, pecan, and orange peel. Apart from fruit such as olive and coconut, where lipid accumulates in the pulp( mesocarp ) of the maturing fruit, or orange peel, where oil is compartmentalized, lipids are seen to be concentrated in seeds. Single images of sugar distribution have been presented for limited number of small fruit: namely, blueberry, grape, kiwifruit and pea. The chemical shift difference between water and fruit sugars is about 1.1Hz. Because of the close proximity, there is some overlap between the large water resonance peak and the typically smaller, satellite, sugar resonance. Thus pulses which selectively excite sugar protons. The problem is compounded further by magnetic susceptibility effects which broaden both resonance peaks creating even greater overlap. Useless these effects are adequately countered the resulting sugar image will be ‘contaminated’, making it difficult to distinguish artefacts and genuine sample features. It is clearly of interest be able to investigate the distribution of sugar during maturation and ripening processes non-invasively. Attempts to achieve this objective centre around development of improved pulse sequence experiments which produce artefact-free images by selectively suppressing the interference from water to below noise level or incorporate 2D correlation spectroscopy to discriminate resonances. Such an achievement would allow determination of sugars at even lower concentrations.

Answer 1

达到满意的信噪比,化合物应该出现在高浓度或局限在特定的器官或器官。而且,他们的共振频率也不应该太接近的水。在很大程度上满足本准则物种在水果和蔬菜包含糖和脂肪,分布在山核桃胚间脂是最早的磁共振影像出版。(CH2)n共振3.5 ppm远离水、脂质分布模式已经出版了。早期磁振造影公布帐户、咖啡、葡萄荣文、花生、奇异果、橄榄、核桃、橙皮。除了水果,如橄榄油、椰子油、脂质就在纸浆(mesocarp)成熟的水果、橙皮、油、脂质,推动为主要集中在种子。单一图像的糖,给出分配数量有限的小果:即、蓝莓、葡萄、奇异果、豌豆。水的化学位移之间的差别是1.1Hz水果和糖。由于接近,有重叠庞大的水谐振峰和一般较小、卫星、糖共振。因此,选择性刺激脉冲糖质子。这个问题而被磁化率的影响进一步扩大双方共振峰创造更大的重叠。这些效果是无用的充分的形象将会导致血糖污染的,很难区分文物和真正的样本特征。很明显,可以探讨利益分配的成熟和成熟的过程中糖的非侵入性的方法。为了达到这个目的中心附近的发展提高脉冲串实验产生artefact-free采用选择性抑制干扰的图像从水下面的噪音水平或将二维相关光谱歧视共振。这样的成就将确定在更低的浓度的糖。

Answer 2

To achieve satisfactory signal-to-noise ratios, compounds should be present in high concentrations or localized in specific organs or organelles. Furthermore, their resonant frequencies should not be too close to that of water. Species that largely satisfy these criteria in fruit and vegetables include sugars and lipids, the distribution of lipid in pecan embryos being amongst the earliest MR images published. The (CH2)n resonance is about 3.5 ppm away from water, and patterns showing lipid distribution have been published. The earliest MR images published .for account, coffee , grape, groundnut, kiwifruit, olive, pecan, and orange peel. Apart from fruit such as olive and coconut, where lipid accumulates in the pulp( mesocarp ) of the maturing fruit, or orange peel, where oil is compartmentalized, lipids are seen to be concentrated in seeds. Single images of sugar distribution have been presented for limited number of small fruit: namely, blueberry, grape, kiwifruit and pea. The chemical shift difference between water and fruit sugars is about 1.1Hz. Because of the close proximity, there is some overlap between the large water resonance peak and the typically smaller, satellite, sugar resonance. Thus pulses which selectively excite sugar protons. The problem is compounded further by magnetic susceptibility effects which broaden both resonance peaks creating even greater overlap. Useless these effects are adequately countered the resulting sugar image will be ‘contaminated’, making it difficult to distinguish artefacts and genuine sample features. It is clearly of interest be able to investigate the distribution of sugar during maturation and ripening processes non-invasively. Attempts to achieve this objective centre around development of improved pulse sequence experiments which produce artefact-free images by selectively suppressing the interference from water to below noise level or incorporate 2D correlation spectroscopy to discriminate resonances. Such an achievement would allow determination of sugars at even lower concentrations.
取得令人满意的信号噪声比，化合物应在高浓度或本地化的具体器官或细胞。此外，其共振频率不应过于接近水。物种基本上满足这些标准的水果和蔬菜包括糖和血脂，脂肪的分布情况在山核桃胚胎中最早被磁共振成像出版。的（甲基）无共振约3.5百万分之远离水和脂肪分布格局显示已经出版。最早的MR图像公布。帐户，咖啡，葡萄，花生，猕猴桃，橄榄，胡桃和橘皮。除了水果，如橄榄油，椰子，其中脂质积聚在制浆（中果皮）的成熟的水果，或橘皮，其中石油是条块分割，血脂被认为是集中在种子。单糖分布图像已提交的数量有限的小水果，即：蓝莓，葡萄，猕猴桃和豌豆。化学位移差异饮用水和水果糖约1.1Hz 。由于接近，有一些重叠的大型水利共振峰和一般较小，卫星，糖共鸣。因此脉冲选择性刺激糖质子。问题是复杂磁化率进一步扩大双方影响谐振峰创造更大的重叠。无用的这些影响有足够的反击造成的糖形象，将是'污染' ，因此很难区分真正的艺术品和样品的特点。这显然是有兴趣可以探讨糖分布在成熟和成熟过程非侵入性。努力实现这一目标，围绕着发展的脉冲序列的实验改进生产工艺品的图像通过选择性抑制干扰水下面噪音水平或将二维相关光谱歧视共振。这样的成就将使测定糖在更低的浓度。

Answer 3

取得令人满意的信号噪声比，化合物应在高浓度或本地化的具体器官或细胞。此外，其共振频率不应过于接近水。物种基本上满足这些标准的水果和蔬菜包括糖和血脂，脂肪的分布情况在山核桃胚胎中最早被磁共振成像出版。的（甲基）无共振约3.5百万分之远离水和脂肪分布格局显示已经出版。最早的MR图像公布。帐户，咖啡，葡萄，花生，猕猴桃，橄榄，胡桃和橘皮。除了水果，如橄榄油，椰子，其中脂质积聚在制浆（中果皮）的成熟的水果，或橘皮，其中石油是条块分割，血脂被认为是集中在种子。单糖分布图像已提交的数量有限的小水果，即：蓝莓，葡萄，猕猴桃和豌豆。化学位移差异饮用水和水果糖约1.1Hz 。由于接近，有一些重叠的大型水利共振峰和一般较小，卫星，糖共鸣。因此脉冲选择性刺激糖质子。问题是复杂磁化率进一步扩大双方影响谐振峰创造更大的重叠。无用的这些影响有足够的反击造成的糖形象，将是'污染' ，因此很难区分真正的艺术品和样品的特点。这显然是有兴趣可以探讨糖分布在成熟和成熟过程非侵入性。努力实现这一目标，围绕着发展的脉冲序列的实验改进生产工艺品的图像通过选择性抑制干扰水下面噪音水平或将二维相关光谱歧视共振。这样的成就将使测定糖在更低的浓度。