磷化氢的生物合成

磷化氢（PH3）是有毒、致癌、无色、有恶臭味的气体，既可由工业化学合成，也可由生物合成。产PH3的微生物一般为兼性厌氧和专性厌氧微生物。借助于气相色谱检测，已发现PH3在自然界中广泛存在。热力学分析，磷酸盐还原成磷化氢是一种吸能反应。目前，磷化氢生物合成的具体机制还不清楚。     

川恒的企划与行销观念——四川川恒化工有限责任公司总经理李光明谈企业管理问题

对于饲料原料企业,本刊采访了饲料级磷酸盐的生产厂家——四川川恒化工有限责任公司,并提出了与之相关的几个问题,李光明总经理回答的内容,希望能与业内同行相互借鉴。     

巧除鸡眼

<正>1．取乌梅10枚,研成细末,装入瓶内,加上香油浸泡7～10天,和匀成药膏。用温盐水浸泡鸡眼,待粗皮软化后去除,取适量药膏敷在鸡眼上,再用纱布包扎,12小时换一次药,3日为一个疗程。2．取地骨皮、红花各10克,研成细末,加适量香油调成糊状。每晚热水泡脚后,     

泡菜精加工技术要点

泡菜是我国民间最广泛、最大众化的蔬菜加工品。只要将蔬菜浸在盐水中,经乳酸发酵即成。其营养丰富,色香味独特,对消化道有保健作用,深受国内外消费者喜爱。     

云南会泽县盐水石榴生产现状及产业开发建议

结合多年来从事石榴引种、试验示范、技术推广等工作经验,对河南石榴栽培区、金沙江中游石榴栽培区、滇南石榴栽培区实地考察,搜集大量材料,并阐述云南省会泽县盐水石榴栽培的基本情况,提出石榴产业可持续发展建议。     

盐水鹅辐照保质试验研究

鹅是食草家禽,鹅肉属现代健康食品。盐水鹅在20℃的贮存条件下仅36h就会出现异味变质。介绍了通过用不同包装材料、不同辐照剂量保质处理以及对盐水鹅氨基酸影响的研究,探讨了盐水鹅辐照保质的方法,为延长盐水鹅货架期提供新途径。     

接种溶磷真菌对玉米和大豆根际细菌群落结构多样性的影响

Application of phosphate-solubilizing microorganisms （PSMs） has been reported to increase P uptake and plant growth. However, no information is available regarding the ecological consequences of the inoculation with PSMs. The effect of inoculation with phosphate-solubilizing fungal （PSF） isolates Aspergillus niger P39 and Penicillium oxalicum P66 on the bacterial communities in the rhizospheres of maize （Zea mays L. ‘Haiyu 6＇） and soybean （Glycine max Merr. ‘Heinong 35＇） was examined using culture-dependent methods as well as a culture-independent method, polymerase chain reaction-denaturing gradient gel electrophoresis （PCR-DGGE）. Compared with the control, the number of culturable microbes for soybean was significantly greater with P39, whereas for maize, the same was significantly greater with P66. In addition, a greater number of microbes were found in the rhizosphere of maize compared with soybean. The fingerprint of DGGE for 16S rDNA indicated that inoculation with PSF also increased bacterial communities, with the P66 treatment having higher numbers of DGGE bands and a higher Shannon-Weaver diversity index compared with P39; the composition of the microbial community was also more complex with the P66 treatment. Overall, complex interactions between plant species and exotic PSMs affected the structure of the bacterial community in the rhizosphere, but plant species were more important in determining the bacterial community structure than the introduction of exotic microorganisms.     

双向晶闸管在有载分接开关中的应用

对双向晶闸管的触发电路和过电压RC缓冲电路进行了研究和设计。经理论分析,本设计可以满足10kV电力用户有载调压的需求,具有广阔的发展前景。     

VA菌根真菌对石灰性土壤不同形态磷酸盐有效性的影响

用32P示踪法研究了VA菌根真菌对石灰性土壤不同形态磷酸盐有效性的影响。结果表明，VA菌很真菌显著增加了玉米吸收肥料和土壤的磷量。菌根植物和非菌根植物都可不同程度地吸收利用土壤中的Ca2-P、Ca8-P、Fe-P和Al-P，VA菌根真菌增加了玉米对它们的吸收。试验结果还表明，施Ca10-P时接种VA菌很真菌对玉米生长的促进作用比施用其它磷酸盐明显，但Ca10-P不能直接被玉米植株所利用。说明VA菌根真菌能提高土壤中的有效性磷（Ca2-P和Al-P）和缓效性磷（Ca8-P和Fe-P）的有效性。