This paper focused on the breeding of an L-lactic acid producing bacteria Lactobacillus easei YBQ1-1, studying the characteristics, medium components, pH and metabolic network of the mutant YBQH2-14 obtained after being selected.Using UV irradiation, L.casei YBQH2-14 was selected in the different plate media such as the medium with high concentration of glucose, lactic acid , CaCO3 -Bromocresol purple and KMnO4 -KBr.

本文主要對L-乳酸生產(chǎn)菌株(Lactobacillus casei YBQ1-1)進行了誘變選育，并研究了突變株YBQH2-14發(fā)酵條件對生產(chǎn)L-乳酸的影響亚洲黄色视频网在线观看，構(gòu)建了L.caseiYBQH2-14的代謝網(wǎng)絡(luò)模型美女被啪到高潮喷奶水的网站，分析了分批發(fā)酵不同階段的代謝通量国产情侣一区二区，同時研究了L-乳酸的應(yīng)用——黑麥麩皮粉發(fā)酵人人摸人人操人人超爽。

With sodium succinate as carbon source and bromothymol blue as pH indicator,20 BTB agar plate positive strains were isolated,from which four of them were identified as aerobic denitrifiers.

利用琥珀酸鈉作為碳源国产白嫩在线观看视频，溴百里酚藍作為pH指示劑，共篩選得到20株BTB瓊脂平板陽性菌乱伦对白视频。通過反硝化性能測定欧美三级片又粗又长，復(fù)篩得到4株好氧反硝化細菌。

But after early lineages branched off, flowers bulked up their endosperm with two sets of genes from the mother and one from the father.

但在原始種系分出旁系后色综合精品一区二区三区，花的胚乳增生国内偷拍人妻，兩組基因來自雌株，一組來自雄株黄色片子网址。

Four field strains of Infections bursal disease viruses isolated in China during 1997～1999 were compared for their pathogenity and sequences in high variable region of vp2 genes.

對4個IBDV野毒株的致病性和它們的vp2基因高變區(qū)序列同時做了比較分析久久99精品这里精品,9。結(jié)果表明， 4個IBDV毒株在致病性程度上存在較大差異网站视频你懂的。

By screening on plate, 64 strains of bacteria with antagonism to E.coli were isolated from Rabbit caecum.

本研究旨在從健康兔腸道內(nèi)分離出一株對大腸桿菌有拮抗活性的菌株亚洲色图欧美色图日本，并對其鑒定到屬。

Heddewigii, Dianthus barbatus L, Dianthus latifolius, Dianthus caryophyllus and Dianthus chinensis var. liaotungensis, with relatively high fructification rates and certain traffic tolerance, showed little difference in ecological adaptability and exhibited an average seedling height of 20cm and a mean crown size of 23cm, and pruning during the late growth period could obviously promote flowering and reduce the seedling height by 3cm. While Dianthus barbatus L. and Dianthus phlox subulata, with relatively low fructification rates and higher traffic tolerance, had an unobvious difference in ecological adaptability, which present an average seedling height of 14cm and a mean crown size of 36cm, and pruning during the late growth period could promote flowering to some extent and reduce the seedling height by 2cm.

其中人人色人人橾人人色人人橾，大紅石竹日韩在线资源精品视频在线观看、錦團石竹、五彩石竹黄色视频免费区、五寸石竹久久一日本道色综合久久青草青草视频、濃香石竹、重瓣石竹品種間差異小a片一级视频，平均苗高20cm欧洲欧美精品黄片，冠幅23cm，結(jié)實率相對高国产日韩欧美久久精品，有一定耐踐踏能力巨乳性爱视频，在生長后期進行修剪能很好的促進開花并降低株高3cm；常夏石竹和美國地被石竹品種間差異小又大又长又硬视频，平均苗高14cm精品一级毛片视频，冠幅36cm，結(jié)實率低国产精品丝袜，耐踐踏能力稍強亚洲换妻视频，在生長后期進行修剪能較好地促進開花并降低株高2cm。

The phenotypic variation among the plants of a sympatric population composed of 169 Castanea mollissima Bl. and 281 C. henryi Rehd.

對分布于湖北省秭歸縣境內(nèi)的一個由169株板栗和281株錐栗C操学生妹视频。

Relationship between soil nutrient and growth of Castanea mollissima was studied by stepwise regress and Path analysis.The results showed that, 4 soil factors of organic matter, hydrolytic nitrogen,rapid phosphorus and rapid potassium had significant effects on its yield and growth of fliage branch, and that the most significant factors affecting yield and growth of foliage branch were rapid phosphorus and hydrolytic nitrogen, respectively.

應(yīng)用逐步回歸和通徑分析97无码视频超级碰碰碰，對土壤養(yǎng)分與板栗株產(chǎn)和徒長枝生長的相關(guān)關(guān)系進行研究，結(jié)果表明好黄色网站，所選的有機質(zhì)巨大黑人极品video中国、水解氮哪里有毛片网址、速效磷和速效鉀4個土壤養(yǎng)分因子對板栗株產(chǎn)和徒長枝的生長都有著顯著和極顯著的相關(guān)關(guān)系，其中以速效磷對產(chǎn)量影響最為顯著欧美一级看片免费观看视频，水解氮對徒長枝生長影響最為顯著18岁以下禁止访问的网站。

Endophytic fungus strain As was isolated from the phloem of the root of Celastrus angulatus.

從新鮮苦皮藤根皮中分離并篩選到1株內(nèi)生真菌，編號為As菌株男女晚上啪啪啪黄色网站，對其代謝產(chǎn)物進行了生物活性研究美女白丝黄视频在线免费观看a。

The biological polymorphism of Cercospora zeae-maydis was studied systematically in the levels of histology, protein and DNA. The major characters in polymorphism of pathogen were listed as follows:(1) The great differences were seen in shapes and sizes of conidiophores, the growth velocity of mycelium and pigment-productivity of colony among pathogen strains. In addition, an albino strain, a kind of mutant, was casually discovered during isolation of pathogen from diseased plants, which supported strongly our previous prediction that there should be some potential genetic variation in Cercospora zeae-maydis.

本研究在組織學、蛋白質(zhì)和DNA水平上国产v日韩免费在线观看，系統(tǒng)研究了玉米灰斑病菌的生物學多態(tài)性a在线视频，這種多態(tài)性主要表現(xiàn)在以下幾個方面：①病菌形態(tài)學和培養(yǎng)性狀多態(tài)性：菌株間存在分生孢子形態(tài)、菌絲生長速度日韩在线资源精品视频在线观看免费、菌落產(chǎn)色素能力等方面的差異欧美性高潮，該病菌在自然界存在另一種變異類型——白化菌株，說明灰斑病菌的確存在遺傳變異的潛能激情视频国产一区。