In plants , sugars not only function as respiration substrates providing energy and metabolic substances for the growth and development , but can act as signal molecules that control gene expression and developmental processes 摘要糖不仅作为呼吸底物为植物的生长和发育提供能量和代谢中间产物；而且具有信号的功能，从而调控植物的生长和发育。
The hnadcs ( human na + / dicarboxylate cotransporter 3 ) mediates the transport of krebs cycle intermediates , such as succinate , citrate and a - ketoglutarate , across the plasma membrane of many epithelial cells 人钠二羧酸协同转运蛋白3 ( humanna ~ + dicarboxylatecotransporter3 ， hnadc3 )基因的编码产物是位于多种上皮细胞膜表面的一类介导琥珀酸、枸橼酸及-酮戊二酸等三羧酸循环中间产物转运的蛋白。
A new dinosaur species was a plant - eater with yard - long horns over its eyebrows , suggesting an evolutionary middle step between older dinosaurs with even larger horns and the small - horned creatures that followed , experts said . the dinosaur ' s horns , thick as a human arm , are like those of triceratops which came 10 million years later 这是一种头上有着多只近1米长的角且以植物为食的恐龙，它其实是恐龙从头上长着很大的角进化到“小角缠头”这一过程内的中间产物。
Because there are a great quantity ' s heterotrophic bacteria in the breeding pool , which will have the repulsion action to the insufficient quantity ' s nitrifier and prevent the nitrification , the situation will bring the accumulating of nitrite which is the middle substance of nitrification in water , the long term accumulated nitrite can debase fish and shrimp ' s disease - resistant and decrease the growth and even die 由于养殖池中存在大量的异养菌，受到异养性细菌排斥，本身无足够数量的硝化菌，硝化作用往往受阻，结果就会引起硝化作用的中间产物亚硝酸盐在水体内的累积、亚硝酸盐长期蓄积会使鱼虾等抗病力降低、生长受阻、严重者中毒死亡。
The p33 , which is considered to be the precursor of p27 and coordinate to e . coli tgi expressed phl , is expressed and excreted at lag phase . then a splicing process is supposed occurred during the exponential phase resulting in production of mature phospholipase p27 . the p32 p31 p30 , p29 are believed to be intermediates of this splicing process 但在菌体生长进入稳定期后，仅产生p60和p27两种成熟的磷酯酶，其中p33为p27的前体蛋白，与phl应为同种蛋白，经剪切作用产生一系列的中间产物p32 、 p31 、 p30 、 p29 ，最终产生成熟蛋白p27 。
The essence of this system is " cogeneration and one supply " , i . e . , on the one hand , the input of the energy system is fossil fuel , its productions are heat and cold , it has only one supply ; on the other hand , the process of produce is cogeneration , power is consumed by the cold and hot water unit as middle production , and the cold and hot water unit produces the heat and cold 这一系统的实质是“联产单供” 。也就是是说，这一能量系统的输入是化学燃料，目标产品是热量和冷量，是“单供”的；另一方面生产过程是热电联产的，电作为中间产物供给冷热水机组消耗掉，通过冷热水机组生产出热量和冷量。
( 6 ) 4 , 6 - diamino - 5 - nitrobenzofuroxan is designed to synthesis from trichlorobenzene through nitration aminatiom azidation and thermal decomposition . this compound is a new explosive . but we only got the intermediates of the first and second steps ( nitration , amination ) because the limit of time ( 6 )从均三氯苯出发，设计经硝化、氨化、叠氮化和脱氮四步合成4 ， 6 -二氨基- 5 -硝基苯并氧化呋咱，这是未见文献报道的新化合物，不过由于时间关系，我们只得到氨化这一步的中间产物即3 ， 5 -二氨基- 2 ， 4 -二硝基氯苯，这也是个未见文献报道的新化合物。
Moreover , the quenching concentration of eu is raised . on the basement of successful synthesis of two - components oxide , edta complexing sol - gel method was expanded and applied to effectively synthesis nanosized muti - components oxide , such as la1 - xsrx fe o3 , lafe1 - xcuxo3 , la1 - xsrx coo3 , laco1 - xcuxo3 because edta can bind with most metallic elements of the periodic table , this technique become a versatile tool in the production and study of new nano materials of multi - component complex oxides . a economic and new process has been studied to synthesis la2o3 nanocrystalline , using nh4hco3 as precipitant 河北大学理学博士学位论文对于单一组份的稀土氧化物，探索出一条更经济、更方便的合成方法，即:用碳酸氢钱做稀土沉淀剂，成功地制备了纳米l匆03 ，并对中间产物碳酸斓及其烧成的氧化斓分别进行了ir 、 tg一dta 、 sem 、 xrd分析研究，确定了碳酸悯的组成，氧化斓的物相、结构，并发现分散剂的种类对微观形貌有一定的影响。
Various perovskite compositions have been prepared through this method and their structure , electronic and magnetic properties have been studied . in this paper , la2o3 , sro2i mn , naclo4 , kmno4 were used as raw materials and were synthesized into la1 - xsrxmn03 powder by employing self - propagating high - temperature synthesis ( shs ) technology and filtration processing . in addition , the mechanism of chemical reaction and microstructure formation process of la2o3 - sro2 - mn - naclo4 - kmno4 system was studied La _ ( 1 - x ) sr _ xmno _ 3的shs合成工艺研究发现，在shs合成过程中液相量的多少和反应温度有很大的关系，通过在反应体系内加入第二相氧化剂kmno _ 4可以控制反应进程， kmno _ 4在反应中分解得到的高活性mno _ 2利于产物的生成，一定程度上避免了氧缺位和中间产物的形成。
The formation process and mechanism are investigated : the adding of n ( ch2ch2oh ) 3 promoted the dissociation of cf3cooh in the starting solution and some non - volatile , fluorine containing intermediates can be remained after tray - drying of the solution . during the following heat - treatment process , the intermediates decomposed and further react with the rest amorphous calcium phosphate , leading to the final formation of fha or fa phase . the fluorine content in the fha phase obtained could be tailored by the content of cf3cooh added . 发现cf _ 3cooh只有在加入n ( ch _ 2ch _ 2oh ) _ 3的条件下才能形成fha相和fa相，其机理是：在溶液中加入n ( ch _ 2ch _ 2oh ) _ 3能够促进溶液中cf _ 3cooh的离解，形成无挥发性的含氟过渡化合物，溶液快速干燥后的中间产物中仍能保留过渡性的含氟化合物，在随后的热处理过程中，过渡化合物分解并与非晶态的钙磷酸盐反应最终生成fha相或fa相。
