查询词典 biomass

In order to reveal the effects of tilapia on phytoplankton and periphyton, an experiment with two treatments, one with tilapia and one without tilapia (non-fish group) was carried out, and the biomass of both phytoplankton and periphyton was analyzed.

为了解罗非鱼对浮游植物和附着藻类的影响，实验在室外模拟条件下，分别设置罗非鱼组和无鱼对照组的两组处理，分析了罗非鱼对附着藻类及浮游植物生物量等的影响。

The results showed that removal effect of periphyton on nitrogen was significant.Cumulative removal ratio of nitrogen was up to 60%,the nitrogen concentration decreased from 5 to 2 mg /L or so within two weeks.Cumulative removal ratio of nitrogen was closely related with nitrogen concentration,working time and biomass of periphyton.

结果表明，附着生物对水体中的氮有显著的去除效果，半个月内，附着生物对水体中总氮的累积去除率可达60%，在有附着生物的水体中总氮浓度从5 mg/L左右下降到2 mg/L左右；附着生物对水柱中氮的累积去除率和水柱中氮的浓度、附着生物的生物量以及附着生物作用时间密切相关。

The results showed that the species number of periphyton was the greatest in summer and the density of dominant species was the highest in summer and autumn, and the water quality was generally consistent with the tendency of the changes both in the indices of diversity and evenness. There were significant negative correlations between the contents of N and P in water, and the indices of diversity, evenness, algae density, total biomass, while CODcr and BOD5 did not show any significant relationship with these four biological indices.

研究结果显示，着生生物种类数以夏季最多，优势种密度以夏、秋季最大，多样性指数、均匀度指数的变化趋势与水质指标的监测结果基本一致；经相关性分析表明：水体中氮、磷含量分别与生物多样性指数、均匀度指数、藻类密度和总生物量四项指标呈显著负相关， CODcr、BOD5与四项生物指标均无相关性。

During the experiments,filamentous periphyton growed well in sewages,and its biomass was increased signicantly with nitrogen and phosphorus removal rates.The maximum removals of NH_4~+-N,NO~(3-)-N,TN,PO_4~(3-)-P and TP were occurred as the Chla concentrations were 1.14,1.01,1.00,0.84,and 1.02 mg·g~(-1),respectively.

试验期间，丝状周丛藻类能很好地适应污水环境，其生物量和氮、磷去除率显著相关，NH_4~+-N、NO_3~--N、TN、PO_4~(3-)-P和TP的最高去除率分别出现在Chla浓度为1.14、1.01、1.00、0.84和1.02 mg·g~(-1)时。

When the TN:TP ratio was 25:1,V.spiralis had the best growth, with a biomass increment being 54% and 31% higher than that when the TN: TP ratio was 12.5:1 and 50:1, respectively, while the growth of periphyton, especially of epiphytic algae, was the worst, giving the least adverse effects on V. spiralis, indicating that a 25:1 of TN:TP ratio in eutrophic water was optimal for the growth of V. spiralis. However, such an optimal TN: TP ratio only worked when the nutrients concentration in eutrophic water was below the limited level, otherwise, it could be failed to be applicable.

结果表明：当TN/TP为25：1时，苦草的生长状态最好，苦草生物量的增长率最大，分别高于TN/TP为12.5：1和50：1时的54%和31%；当TN/TP为25：1时，附着生物尤其是附着藻类的生长状态最差，对苦草生长的不利影响最小；可见，富营养水体中适宜于苦草生长的TN/TP为25：1；TN/TP为25：1这一比例的应用具有相对性，当水体营养浓度低于限制水平时，该比例适用，如果水体中营养盐浓度超过限制水平时，该比例则不适用。

6Unicellular periphyton has also shown good adaptability to sewages,with remarkable increases of Chla(58.2%)and biomass (54.0%).It was also observed that community compositions were successfully changed from original unicellular Bacillariophytes and chlorophytes dominated community to filamentous and unicellular Cyanobacteria dominated community.

6水质处理期间，颗粒态周丛藻类也表现出对污水环境很好的适应性，其Chla在整个试验期间增长了58.2%，生物量增长了54.0%，群落组成由试验初期的颗粒态硅藻、绿藻为主，转变为试验后期的以丝状和颗粒态蓝藻、绿藻为主的藻群，水绵、丝藻、纤维藻、颤藻等藻类大量出现。

Under this experiment condition, biomass, grain weight and number of panicles upgraded with the increase of nitrogen level.

氮处理对不同基因型水稻地上部的生物量和籽粒产量有极显著影响。

Some technologies,including olefines from methanol,oxalates and ethylene glycol from carbon monoxide,carbon dioxide-based polymers,chemicals from the syngas prepared by biomass gasification,acetone and butanol by fermentation,and chemicals from acetylene,ethanol,glycerol,furfural,hydroxymethyl furfural and starch,were reviewed.

包括甲醇制烯烃，一氧化碳制草酸酯和乙二醇，乙炔化学品，二氧化碳聚合物，生物质气化合成化工产品，发酵法生产丙酮、丁醇，乙醇衍生化工产品，甘油合成化工产品，糠醛和羟甲基糠醛合成化工产品，淀粉合成化工产品等重要的石油替代化学品生产技术被介绍。

By locating relative genes or operons, genetic modification of industrial microbe could be performed to help further develop multiple biomass energy resource with un-glucosyl group, which is very meaningful to the transformation of energy pattern as well as sustainable development.

通过定位与此相关的特殊操纵子或编码基因，能够帮助实现工业微生物的改造，从而使多种非葡萄糖基生物质能源得到有效利用，对能源模式的转化和可持续发展有着重要意义。

Refineries. Other fuel-related research is evaluating greater use of ethanol in gasoline, removal of unwanted byproducts from fuel, identification of more effective refinery catalysts, potential molecular-level enhancements to fuel blends, and thermo-chemically converting cellulosic biomass – wood, corn stover and switch grass – into bio-oil.

其他相关燃料的研究正在评估在汽油中更多地使用乙醇，从燃料里移出不必要的副产品，确认更有效的炼油催化剂，对混合燃料增强潜在的分子水平以及用热化学法将纤维素生物质-木材，玉米秸秆和开关草-转化成生物油。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。