Through the test of water absorbing, water holding and water releasing performances of all water retention agents, sawdust, vinegar stillage and cabbage palm, this paper points out the affect on ecological concrete of different water retention agent and also conclude the affect on ecological concrete holding water or water releasing of spacing ratios, water retention agents, materials addition and different stones.

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Work in this paper focuses on the data mining from chromatographic retention index data. A retention index database that contains about 50000 records of retention index is firstly established. Projection pursuit technique is then utilized to do data mining upon the data in order to find out some valuable information about the relationship between the retention indices and structural descriptors. A novel algorithm for projection pursuit is developed in this work. Samples of alkane, alkene and cycloalkane are investigated.

中文題名化學(xué)數(shù)據(jù)挖掘新算法和定量構(gòu)性關(guān)系基礎(chǔ)研究副題名外文題名 New methodology in chemical data mining and foundational research on QSPR 論文作者杜一平導(dǎo)師梁逸曾學(xué)科專(zhuān)業(yè)分析化學(xué)研究領(lǐng)域\研究方向化學(xué)計(jì)量學(xué)學(xué)位級(jí)別博士學(xué)位授予單位湖南大學(xué)學(xué)位授予日期2002 論文頁(yè)碼總數(shù)115頁(yè)關(guān)鍵詞定量構(gòu)性關(guān)系化學(xué)計(jì)量學(xué)數(shù)據(jù)挖掘館藏號(hào)BSLW /2003 /O6 /2 化學(xué)數(shù)據(jù)挖掘正逐漸引起化學(xué)家們的關(guān)注。

The water retention value, the saline retention value and the fresh blood retention value of the modified surgical pledget are respectively 8.6 times, 2.8 times and 1.7 times higher than the original pledget.

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Result The dust-retention amounts per unit area and the dust-retention amounts per plant of different tree species had bigger difference. Among trees, the dust-retention abilities of Ligustrum lucidum, Platycladus orientalis, Cedrus deodare, Platanus hispauiea anti Spohora japonica were stronger. Among shrubs, the dust-retention abilities of Viburnum odoratissimum, Pittosporum tobira, Euonymus japonicus and Lagerstroemia indica were stronger.

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The effects of many factors in the wet end on drainage and retention of PEO/attapulgite system: During the scope of 2-12, pH has no effect on drainage, and retention ratio lower in acidic conditions and higher in neutral or alkaline conditions. There were some improvement on slurry's drainage and some impairment on retention efficiency for the existence of inorganic salts. Lignosulphonate had no effect on drainage and made retention ratio decrease 5-8%; lignosulphonate and xylan had no effect on drainage and made retention ratio decrease a little. 5 .Attapulgite could be modified by intercalation.

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A method according to claim 1 in which said retention member comprises a preliminary retention member which is removably fitted to said root member, and is of sufficient length to pass through a hole in the wall of the mold, whereby to position the counterweight member and root member in the mold, said preliminary retention member being removable to permit the removal of the cured body of fibers, counterweight and root member from the mold, a second retention member being substituted for the first retention member having a length substantially equal to the thickness of the spar member and bonding said second retention member to the spar and to the skin sections in step.

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Study on color retention process of dried litchi;2. Technology of litchi rind color retention during hot air drying of litchi fruit;3. In this study we obtain a hig h effect color retention ag ent on studying effects of several sing le or complex color retention ag ents.

本文通過(guò)對(duì)幾種護(hù)色劑單體及復(fù)配體對(duì)肉制品的護(hù)色效果研究，獲得了一種高效的復(fù)合護(hù)色劑国产精品乱子论免费无码，它可以使低溫肉制品在存儲(chǔ)一個(gè)月后仍保留有一定的紅色一级不卡毛片，外觀尚可。

Copper fixation rate affected by retention, fixation time, ligand type, and addictive. For all formulations, while other three conditions is the same, copper fixation rate of preservatives with low retention level is less than those with higher retention level; copper fixation rate of oven-dried bamboo samples is less than air-dried bamboo samples; copper fixation rate of amine-based preservatives is less than ammonia-based ones; copper fixation rate in some formulations containing carbonate and phosphate is higher than non-carbonate and non-phosphate ones.

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The resultant cationized pulp fibers can obviously improve the retention of precipitated calcium carbonate filler in the furnish. Adding 2% of CPF （based on oven-dry pulp） can improve the retention of PCC from 61.1% to 83.4%, compared with the retention of PCC only 78.2% by adding 0.05% of CPAM, and also the application of CPF is better than adding EPI-DMA directly. At the same time, CPF can improve the drainage performance of the stock.

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But the retention of whole-genome duplications seems to have been rare, which has led to the suggestion that they are an evolutionary dead end.

但是這種全基因組復(fù)制的保有力被認(rèn)為是非常罕見(jiàn)的（譯注：這句話我不是很明白久久一级婬A片AAA毛片女人，我的解釋是：這里的retention和基因組復(fù)制的保守性不是同一概念。