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Abstract The whole DNA of soybean was implanted into four varieties of wheat of Zhongyu5, Huaiyin 9628, Wenyou 1, Jimai 5 respectively via ion-beam mediation. There were 5 plantsobtained whose protein content was higher than 18.5%, the highest one was 21.44%. There were 3plants obtained whose protein content was lower than 11.5%, the lowest one was 10.96%. We cansee that the whole DNA of soybean transformed into wheat via ion beam implantation can inducethe increase in wheat protein content dramatically. The result also shows that the transformationefficiency of different gene types of wheat receptor varies greatly that the implanting time has acertain effect on the efficiency of transformation. 相似文献
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In a simple ethanol-water system,the magnetic α-Fe nanoparticles(with an average diameter of 10-40 nm)were prepared by reduction of Fe2 +using potassium borohydride in the presence of surfactant.Then the shell was formed by hydrolysis-condensation polymerization of tetraethylorthosilicate(TEOS)on the surface of the Fe particles.The samples were characterized by XRD,TEM,SAED,TG-DSC and VSM.The results indicate that a thin film of silica is coated on the surface of Fe particles through a Si-O-Fe bond.The coated shell of silica can effectively protect the Fe cores from being oxidized. 相似文献
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Growth and surface properties of new thermoacidophilic Archaea strain Acidianus manzaensis YN-25 grown on different substrates 总被引:1,自引:0,他引:1
The growth and surface properties of new thermoacidophilic Archaea strain Acidianus manzaensis YN-25 isolated from an acid hot spring in Tengchong,Yunnan Province,China were investigated cultured on different substrates including soluble substrate ferrous sulfate and nonsoluble solid substrates S~0,pyrite and chalcopyrite.The growth characteristics of the cells in each substrate were characterized with the changes in cell number,pH,E_h,and concentrations of Fe~(2+)or SO_4~(2-),or ratios of[Fe~(2+)]to[Fe~... 相似文献
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利用小波变换系数的模值与信号奇异性指数之间的关系,从调频信号中提取出调制信号的频率.其方法是:对调频信号进行小波变换,取适当尺度上的小波系数进行平方,得到小波变换模极大值的分布曲线,对该曲线进行小波强制滤波,得到反映调制信号频率的光滑曲线,计算该曲线的频率,即可得调制信号的频率.经过计算机仿真,证明该方法是可行的. 相似文献
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荞麦绿豆蛋白饮料的研制 总被引:1,自引:0,他引:1
以杂粮中的荞麦和绿豆为原料,以感官评定和稳定性为指标,确定出苦荞绿豆奶饮料的生产工艺配方和主要工艺参数,并对饮料中功能性成分芦丁含量进行了测定。 相似文献
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嗜酸氧化亚铁硫杆菌浸出黄铜矿中氧化还原电位、黄铁钾钒和胞外聚合物的关系和影响(英文) 总被引:2,自引:0,他引:2
在合成的胞外聚合物(EPS)溶液中,研究不同起始总铁量、不同Fe(III)与Fe(II)摩尔比条件下嗜酸氧化亚铁硫杆菌浸出黄铜矿过程中pH、电位、可溶性铁离子和Cu2+浓度随浸出时间的变化。结果表明:当溶液电位低于650mV(vsSHE)时,因细菌产生的EPS可通过絮凝黄铁钾钒延缓污染,即使铁离子浓度达到20g/L,黄铁钾钒对细菌浸出黄铜矿的阻碍作用也不是致命的,但随着铁离子浓度的增加而增加;细菌氧化的铁离子容易吸附在黄铜矿表面的EPS表层,有黄铁钾钒的EPS层是弱离子扩散壁垒,细菌通过把EPS空间内外的Fe2+氧化成Fe3+,进一步创造高于650mV的电位,导致EPS层离子扩散性能的快速恶化,严重地和不可逆地阻碍生物浸出黄铜矿。 相似文献
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盘龙参内生真菌S-3可产生黄酮类化合物,通过ITS法测序分析,S-3鉴定为嗜松青霉Penicillium pinophilum。为了增加内生真菌S-3产黄酮量,以单因素结合正交法优化S-3菌株发酵条件,结果表明,最佳发酵条件如下:发酵培养基组成为马铃薯100 g,玉米粉40 g,葡萄糖10 g,豆饼粉10 g,磷酸二氢钾3 g,硫酸镁1.5 g,水1 000 mL,pH6.7;发酵温度28℃,摇床转数160 r/min,发酵时间4 d。 相似文献
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对油炸山药片的主要生产工艺参数,包括护色剂配方及浸泡时间,最佳干燥温度和时间,最佳油炸温度和时间进行了研究,结果表明最佳的工艺参数最佳护色剂配方为异VC钠0.7%,柠檬酸0.5%,CaCl2为0.2%,浸泡时间为50 min;最佳的干燥温度为85℃,时间为90 min;最佳的油炸温度为160℃,时间为20 s。 相似文献