查询词典 low water

This article, after the study of the features and classifications of waste water produced by chemical experiments, highlights the classificatory treatment of high concentration of experimental waste water and the ecological treatment of low concentration of experimental waste water.

在研究了高校化学实验废水的特点和分类后，着重探讨了高浓实验废水的分类处理法和低浓实验废水的净化塘生态处理法。

The invention relates to a composite water retaining agent with low cost and high water absorption and a method for preparing the same, wherein the raw material of the water retaining agent includes 100 parts by weight of acrylic acid, 20-80 parts by weight of attapulgite, 20-80 parts by weight of bentonite, 0.05-1.0 parts by weight of initiator, and 0.05-1.0 parts by weight of crosslinking agent.

本发明涉及一种低成本高吸水复合保水剂及其制备方法。保水剂的原料的重量份数为：丙烯酸100份，凹凸棒土20-80份，膨润土20-80份，引发剂0.05-1.0份，交联剂0.05-1.0份。

The results are as following:The study shows that a main factor that restricts the plant yield and quality of water chestnut is the low level of prevention and control of water chestnut culms damping-off; a disease of the water chestnut.

荸荠种植产量和质量偏低，使得农户种植荸荠不能获取较大的经济效益。

The fresh grass carp sold in market was processed to freezing semi-dry products with low salt and high water through salting, drying, packaging, deepfreeze and frozen storage, and the changes of the water content, the salt content, the water holding capacity and the sensory quality of fish body in the process of frozen storage were studied.

方法］通过腌制、干燥、包装、速冻和冻藏将市售新鲜的草鱼加工成低盐－高水分冷冻半干制品，研究冻藏过程中鱼体水分含量、盐分含量、系水力和其感官品质的变化。

When evaporation was in process, due to low initial water content, most infiltrated water from small intensity and amount of rainfall would be consumed by intensive evapotranspiration during rainy season, and lateral downslope unsaturated flow seldom took place. However, soil water would move downslope by gravitational and matric potential gradients after continuous rainfall.

3在防止蒸发条件下，再分布过程中，土壤水分在重力的作用下有沿坡向下运移的趋势；在蒸发条件下，由于初始含水量一般较低，雨季量小且分散的降雨极易为强烈的蒸发蒸腾所消耗，侧向沿坡向下流难以发生，但在持续的降雨条件下，土壤水分在重力势和基质势梯度的作用下易沿坡向下运移。

The results showed that the diurnal changes of photosynthesis of S. chinensis in tile overstory took on "double-peak" curve with remarkable midday depression. The midday depression was mainly due to non-stomata1 limitations. On the contrary, the diurnal changes of photosynthesis of S. chinensis in the understory took on "one-peak" curve with low Pn. The maximal Pn was only half of that of S. chinensis in the overstory. The correlation analysis showed that the limiting factor for this low Pn might be light intensity (p=0.001). Compared with its accompanying plants, S. chinensis was in a disadvantaged status in the community with low photosynthetic capacity, water use efficiency, and the ratio of photosynthetic rate to respiration rate.

结果表明：夏蜡梅冠层的光合速率日进程呈"双峰"曲线，有明显的"午休"现象，经分析其"午休"的原因主要是由非气孔因素引起的；林下夏蜡梅则表现为"单峰"曲线，净光合速率较低，最大净光合速率不及冠层的1/2，相关分析结果表明其最重要的影响因子是光合有效辐射(p=0.001)；与其它伴生植物相比，夏蜡梅的日均光合速率、最大光合速率、水分利用效率和光合速率／呼吸速率都明显偏低，在群落竞争中处于不利地位。

A process for partial conversion and low-temp transform of CO in the synthetic ammonia plant where coal is used to generate gas features that the Fe-Mo catalyst for partial conversion of CO, anti-poisoning agent and Co-Mo catalyst for low-temp conversion are used and the temp of semi-water gas is controlled to 200-260 deg.C at entering anti-poisoning layer, and 150-250 deg.C at the segments of said Co-Mo catalyst layer, and lower than 300 deg.C at bed layer to prevent high-temp reversal of sulfurizing reaction and make the catalyst activity optimal. Its advantages are long service life of catalyst, low system resistance, saving energy and convenient operation.

本发明是中小合成氨厂以一种CO部分转化抗毒保护层配低温变换的工艺，涉及煤造气合成氨厂0.6～2.0MPa半水煤气变换工艺流程，该工艺用铁－钼CO部分转化催化剂、抗毒剂，配钴－钼低变催化剂，半水煤气进入部分转化抗毒层温度为200～260℃，进钴－钼低变催化剂各段温度为150～250℃，床层温度控制在300℃以内，避免高温下反硫化反应发生，保护催化剂活性处最佳状态，寿命延长、系统阻力小、节汽、节电，具有比其他变换工艺更好地节能效果，操作方便，有效生产时间长，经济效益显著等特点。

Maize plants were treated by the low temperature under different water conditions during seedling and tasseling periods in the artificial climate chamber to determine the impacts of low temperature, drought and their combination on maize yield in the Northeast China. Based on the results of the controlled experiment, the WOFOST model was applied to simulate the integrated impacts of low temperature and drought on maize yield.

在玉米苗期和抽雄期利用人工气候箱对不同水分条件下的玉米植株分别进行低温处理，通过控制试验分析了低温、干旱以及二者合并对玉米生产的影响，在此基础上应用WOFOST作物模型模拟分析了低温、干旱以及二者合并对东北地区玉米产量的影响。

The PMC elastic polymer cement waterproof paint has many advantages such as low polymer content, low polymer and cement ratio, large elasticity, low cost, good modified effect, good resistance to water , weather and aging and so on.

PMC弹性聚合物水泥防水涂料聚合物用量少、聚灰比低、弹性大、成本低、改性效果好，耐水性、耐候性、耐老化性能优越，本文介绍其性能与施工方法。

It was pointed out that the water-based pesticide formulation was high-pesticide-effect, low polluting to environment, low toxicity to human being and livestocks, safe to be stored and transitted, low cost, ect.

在国内外的农药和化工领域，悬浮乳剂、悬浮剂和水乳剂是水基性剂型开发的主要方向，具有较大发展前景。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。