The influences of culture conditions, such as medium compositions (including carbohydrate, nitrogen, mineral salts, amino acid and stimulus), medium pH, temperature, culture time, inoculation amount and aeration, on the growth and antimicrobial activity of Bacillus natto were evaluated.

培養(yǎng)基的組成和培養(yǎng)條件對納豆菌生長及抗菌物質的產(chǎn)生有很大的影響。

The results indicated that, when dissolved oxygen concentration varied from 6 mg/L to 9 mg/L, turbots in nano-metre pure oxygen system were higher on growth, survival rate and feed conversion efficiency than those of air system; A farming trial was conducted to determine growth difference of turbot between pure oxygen and air system. Length growth, weight growth, survival rate and FCE were better in nano-metre pure oxygen system than air system. The results suggested that nano-metre pure oxygen was better than aeration in turbot farming system when dissolved oxygen concentration was from 6~9 mg/L.

結果表明很很操很很爆操爆视视，微米純氧Ⅰ組大菱鲆的體重增長亚洲国产一二三在线观看无码唯美、成活率日本强奸乱伦中文字幕、肥滿度及餌料轉化率高于機械增氧組国产产精品亚洲一区二区在线观看；微米純氧Ⅱ組各指標低于機械增氧組欧美性交网。7個月的大規(guī)模生產(chǎn)試驗（800 m2水面，溶解氧6~9 mg/L）表明肏美女女生视频网站，采用微米純氧氣泡增氧養(yǎng)殖大菱鲆先锋影音av鲁色资源站，各測定指標均顯著高于機械增氧，可以加快大菱鲆生長黄色视频在线看污，提高成活率和餌料轉化率求个国产av网站。

In this study,computational fluid dynamics is applied to simulate the U-shaped duct aeration.

計算流體力學研究方法的運用可成為機械通風優(yōu)化設計研究的有效工具，為今后機械通風應用技術的發(fā)展提供針對性和實用性的依據(jù)性欧美XXXX乳视频。

A sidestream from the de-aeration tower feeds two sand filters and a calcium reactor.

曝氣塔兩側中的兩側是砂石過濾器和鈣反應堆国产精品综合第三页。

The oxygen consumption characteristics of jet aeration-pressurized biological contact oxidation process was studied in this paper, and the relationship between pressure, air-water ratio, dissolved oxygen, oxygen uptake rate , and volume load was analyzed.

研究了射流曝氣-壓力式接觸氧化法的耗氧特性，分析了壓力一级av中文字幕αV一级、氣水比精精国产XXXX视频在线直播1、溶解氧、耗氧速率国内一级a爱片在线观看、容積負荷等的相互關系欧美一级片在线视频网站。

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

曝氣設備的動力效率在葉輪轉速為120rpm～150rpm時取得最大值，此時氧利用率和充氧能力也具有較高值古伐一级婬片A片AAA毛片。

Aeration is a main method to remediate polluted river water.

曝氣充氧技術是修復受污染河道的主要方法之一欧美男女一级黄色视频。

Presents the design and application of the key equipment, aeration cone for pulverised solid transportation in pulverised coal gasification, analyzes and summarizes the problems in the operation, and proposes measures for improvement.

對粉煤氣化裝置中粉料輸送的關鍵設備通氣錐的設計、應用情況進行介紹午夜福利视频少妇直播网站，并對生產(chǎn)運行中出現(xiàn)的問題進行分析總結人人操人人高潮，提出改進措施。

The optimization design problem of reducing planet gear box in big power inverted umbrella aeration machine has been solved.

本文通過對遺傳算法的研究色淫五月天，構造了大功率倒傘曝氣機行星減速齒輪箱的數(shù)學模型又粗又大又爽，通過編碼的方法對其輪系的離散變量、整型變量進行了尋優(yōu)設計一级特黄无费真人毛片，解決了大功率倒傘曝氣機行星齒輪優(yōu)化設計的問

It should be dirty water It is the oxidize aeration pot and biological chooser of DE model main to handle to building this, is disgusted, oxygen pool and hole type.

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