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Results and discussion Molecular design and synthesis Although a vast number of phthalocyanines have been reported, to our knowledge, these 1,4-disubstituted analogues remain relatively rare.6b,8 Compared with the unsubstituted zinc phthalocyanine, they exhibit a red-shifted Q band at ca.

结果和讨论分子设计和合成虽然数目庞大的酞菁的报告，以我们的知识，这些1，4取代类似物仍然相对 rare.6b ， 8日与unsubstituted锌酞菁，他们表现出了红移Q带

Compared with the unsubstituted zinc phthalocyanine, these di-a-substituted analogues have a red-shifted Q band (at 689 vs. 670 nm) and exhibit a relatively weaker uorescence emission and a higher efciency at generating singlet oxygen.

与unsubstituted锌酞菁，这些娣给取代类似物有红移Q带（在689与670 nm ）和展览相对弱uorescence排放和更高efciency产生单线态氧。

Vadim Backman, PhD, a professor of biomedical engineering at Northwestern University in Evanston, Illinois, and colleagues, recently developed the 2 complementary optical techniques that were used in the study. The 4-dimensional elastic light-scattering spectroscopy (4D-ELF) and low-coherence enhanced backscattering spectroscopy use the elastic light-scattering signals from tissue that exhibit characteristic structure-dependent signatures in wavelength and scattering angle, explain the researchers in their paper.

伊利诺斯州埃文斯顿西北学的Vadim Backman生物医学工程博士与其同事，在此研究中应用最近发展的两项互补式光学技术，四维弹性光散射光谱（4D-ELF）与低相干散射增强光谱，运用组织中特殊结构表现的波长、与散射角度的弹性光散射信号来解释这项研究。

Vadim Backman, PhD, a professor of biomedical engineering at Northwestern University in Evanston, Illinois, and colleagues, recently developed the 2 complementary optical techniques that were used in the study. The 4-dimensional elastic light-scattering spectroscopy (4D-ELF) and low-coherence enhanced backscattering spectroscopy use the elastic light-scattering signals from tissue that exhibit characteristic structure-dependent signatures in wavelength and scattering angle, explain the researchers in their paper.

伊利诺斯州埃文斯顿西北大学的Vadim Backman生物医学工程博士与其同事，在此研究中应用最近发展的两项互补式光学技术，四维弹性光散射光谱（4D-ELF）与低相干散射增强光谱，运用组织中特殊结构表现的波长、与散射角度的弹性光散射信号来解释这项研究。

Flavonoids are dietary phenolic substances isolated from a wide range of vascular plants, which act as antioxidants and scavengers of free radicals, and possess nutritional and therapeutic value. Many studies have suggested that flavonoids exhibit biological activities, including antiviral, antiinflammatory, vasodilating actions, and cardioprotection and neuroprotection.

类黄酮是一大类从高等植物中提取的可食用的多酚类物质，具有抗氧化和自由基清除活性，对人体具有营养及医疗价值，如抗病毒、抗癌、保护神经系统和心血管系统等。

Already was applied at high-grade building contain, villatic, theater, meeting to exhibit the place such as the center in great quantities.

已经被非常多运用于高等楼寓、小洋楼、剧场、会展中心等场地。

Extensive studies have been made on organic and polymeric light emitting diodes because of their practical application as well as inherent scientific interest. Polymer LEDs using Poly (p-Phenylene Vinylene) were first reported in 1990 by Friend Research group and since then various other kinds of conjugated polymers have been developed which exhibit electroluminescence.

自从1990年英国剑桥大学Friend研究小组用聚对苯撑乙烯制作发光二极管以来，人们对PPV及其衍生物的电致发光性能进行了广泛研究并且取得了很大进展。

In addition, like many other mammals, lions have a specialized organ for detecting scent. This is called the vomeronasal organ, and when using this organ, lions exhibit a facial expression called "flehmen." The flehmen face is characterized by an open mouth, a wrinkled nose and an uplifted chin.

另外，像其他哺乳动物一样，狮子具有识别气味的特定器官，称为梨鼻器，在使用该器官时，狮子呈现出被称为&性嗅反应&的面部表情，其表现为张大嘴巴，皱起鼻子，以及抬起下巴。

The comparative research results showed that:(1)Thediurnal variation of the net photosynthetic rates in the aquatic leaves was a "double-peak", with an various "midday-decline", the time of the peak value appeared at about 10:00 A.M. and 13:00 P.M., while that in the xeric leaves was showed with invarious peak value and "midday-decline"; The diurnalvariation of transpiration ratesof both aquatic and xeric leaves appeared as a single-peak, the appearance time of peak value of the latter was earlier than the former and gradually decreased in the afternoon; The stomatal conductances appearance time of both of them were close to that of photosynthesisrate ,reached to the maximum in the morning and then gradually decreased: Diurnal variation of intercellular CO2 concentrationshows that: both aquatic and xeric leaves increased at first, and then exhibit a tendency of ascending within narrow range.(2) The net photosynthetic rates, photosyntheticallyactive radiation, stomatal conductances and transpiration ratesof both two kinds of leaves showed positive correlation, The correlation degree among them was prominent, there was significant negative correlation between The net photosynthetic rates and intercellular CO2 concentration.

研究结果表明：(1)水生叶片净光合速率的日变化曲线呈双峰型，出现明显的&午休&现象，峰值出现在10：00左右和13：00左右，但旱生叶片表现出的峰型和&午休&现象不明显；两种叶片的蒸腾速率日变化曲线表现为明显的单峰型，旱生叶峰值出现时间早于水生叶，中午过后逐渐下降；两种叶片气孔导度峰值出现时间和光合速率相近，均表现为上午升高至最高，随后逐渐下降的趋势；两种叶片胞间二氧化碳浓度日变化表现为：整体上先下降，然后有一上升趋势：(2)两种叶片的光合速率与光合有效辐射、气孔导度、蒸腾速率呈正相关，全部达到显著水平；光合速率与胞间CO2浓度显著负相关。

The results revealed that xerogel derived from the nitrate-citrate exhibit auto_combustion behavior once ignited in air at room temperature.

研究表明，由金属的硝酸盐和柠檬酸形成的干凝胶具有自燃烧的特性。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷