First , the factors which had an influence on the liquid - state tunning of m12 - 69 producing monaclin k were studied , including carbon source , nitrogen source , initial ph value , culture temperature and time 首先，研究了碳源、氮源、起始ph值、培养温度及时间等因素对m12一69液态发酵的影响。
Both don and pn were the main fraction of nitrogen in autumn 1997 and spring 1998 as well , but nitrate ratio higher in autumn 1997 and ammonia ratio higher in spring 1998 其中两季节浮游植物光合作用均以po4一p为主要磷源，而秋季浮游植物以no3一n为主要氮源，春季则同时以nh4一n和no3一n为主要氮源。
This paper reports that the optimum extraction of exopolysaccharides process by orthogonal design and the effect of different carbonic ( c ) and nitrogen ( n ) sources on cell growth rate and exopolysaccharides production of three porphyridiums 此外，研究不同碳源和氮源对三种紫球藻多糖产量的影响，确定适于多糖生产的最佳碳源和氮源。
Uniform design was employed to optimize the culture conditions and the component of culture medium including carbon source , nitrogen source , phosphor source , growth factors , inorganic salts and precusor as well 利用均匀设计原理进行实验设计，以优化培养基中碳源、氮源、磷源、生长因子、前体物及无机盐成份的配方以及细菌培养条件。
Studying on the effects of nitrogen sources , carbon sources and other influence factors has optimized the lipase fermentation conditions for the strain . the optimal medium composition for the lipase production is ( % ) : yeast extract 1 对菌株lz1进行产酶条件优化研究，发现碳源和氮源的种类，碳氮源比值以及细菌发酵的初始ph值对酶产量影响最大。
The overseas studies on it have been reported since 1960 , but few researches have been carried out in china . in this paper , the culture condition , polysaccharide extraction and rapd analysis of three species of porphyridium were studied 本文主要研究三种紫球藻培养条件的优化，胞外多糖的提取工艺和不同碳源、氮源对多糖产量的影响以及三种紫球藻rapd分析。
How to solve the problem has become a public concern . it has been known that map can be mineralized by some microorganisms . the strain of map - degrading b - 4 was isolated from the polluted soil around shijiazhuang pesticides factory , china 采用室内培养实验方法，从石家庄农药化工厂土样中分离到一株能以甲胺磷为唯一碳源、氮源和能源生长的芽孢杆菌( bacillus ) b - 4 。
In searching for nutrient factors that could increase the growth of strain ag , experiment were made and conclusion were as follows . among the organic carbon sources , 2 . 0g . l ~ glucose obviously stimulated the growth of strain a9 在摸索化学因子对螺旋藻生长的影响中，试验结果显示有机碳氮源对螺旋藻生长影响为：在所提供的有机碳源中， 2 . 0g ? l ~ ( - 1 )的葡萄糖能显著地促进螺旋藻的生长。
It was showed that carbon source bacteria could absorb was a more important factor than ( nh4 ) 2so4 and kh2po4 ; and higher ph , rich biomass of phytoplanktons and zooplanktons in water body also restrained the growth of heterotrophic bacteria 结果表明生物可利用的有机碳是主要的限制性营养因子，而氮源和磷源的影响较小；湖水的高ph以及丰富的藻类和浮游动物生物量也制约了异养细菌的生长。
Edx analysis was carried out to obtain additional information about the elemental composition . it revealed an average n content of 19at . % in the samples when c2h8n2 was selected as the nitrogen source , which was obviously higher than that when nrtcl was used ( 1 % ) X -射线能量色散谱仪( edx )对980下制备的样品进行了定量分析，其平均含氮量为19at . ，明显高于以氯化铵为氮源时cn _ x纳米管的含氮量( 1 ) 。
