The Effects of Allyl Isothiocyanate Compared With Ultraviolet Radiation     

Finley HE  Shirley ES  Wanza JW 《Science (New York, N.Y.)》1948,108(2815):666

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Boric acid-phenolic relationships within the Pinus echinata-Pisolithus tinctorius ectomycorrhizal association     

Sword MA  Garrett HE 《Tree physiology》1994,14(10):1121-1130

At germination, container-grown shortleaf pine seedlings were inoculated with Pisolithus tinctorius (Pers.) Coker & Couch or left uninoculated, and both groups were fertilized semiweekly with a modified Hoagland's solution supplemented with 0 or 0.4 mM boric acid. After 12, 16 and 24 weeks, seedling root tissue was analyzed for ectomycorrhizal colonization, phenolic concentration and phenoloxidase activity. In addition, phenoloxidase activity was assayed in P. tinctorius that had been cultured in a liquid medium containing boric acid. Inoculation with P. tinctorius increased the root phenolic concentration of 16- and 24-week-old seedlings, and increased root phenoloxidase activity in 12-, 16- and 24-week-old seedlings. Fertilization with boric acid reduced the phenolic concentration of P. tinctorius ectomycorrhizae after 24 weeks. Although boric acid fertilization did not affect the phenoloxidase activity of 12-, 16- and 24-week-old inoculated roots, or that of 16- and 24-week-old uninoculated roots, it increased the phenoloxidase activity of P. tinctorius grown in vitro and 12-week-old uninoculated roots. We conclude that boric acid fertilization influences the phenolic relations of the shortleaf pine-P. tinctorius ectomycorrhizal association, possibly through a boric acid-induced increase in phenoloxidase activity.  相似文献   

Residential natural gas consumption: evidence that conservation efforts to date have failed     

Lehman RL  Warren HE 《Science (New York, N.Y.)》1978,199(4331):879-882

A new short-term natural gas consumption model is developed, tested against American Gas Association sales data, and applied to the question of the effectiveness of conservation efforts. The results indicate that unit residential gas-heating sales per heating degree-day have remained constant in four major gas-consuming regions during the period 1974 to 1976 and that heating sales have not been affected by the recent sharp changes in price.  相似文献   

猪链球菌病的诊治     

邓华成  徐雄真 《贵州畜牧兽医》2014,(3):35-36

近几年，随着现代养猪业的规模化、集约化发展，猪链球菌病已成为1种常见的疾病，其发生与流行严重威胁着养猪业生产和发展，给养猪业造成较大的经济损失。现将1例猪链球菌病的诊治情况介绍如下，供参考。  相似文献   

一例山羊传染性胸膜肺炎的诊断与防治     

覃廷玉  张太华  温贵兰  汪德生  邓华成  徐雄真  杨芳  陈勇  彭晓军  林华方 《黑龙江畜牧兽医》2019,(2):92-93,95

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Current status and trends of wheat genetic transformation studies in China     

HE Yi  WANG Qiong  ZENG Jian  SUN Tao  YANG Guang-xiao  HE Guang-yuan 《中国农业科学(英文版)》2015,(3):438-452

More than 20 years have passed since the first report on successful genetic transformation of wheat. With the establishment and improvement of transformation platform, great progresses have been made on wheat genetic transformation both on its fundamental and applied studies in China, especially driven by the National Major Project for Transgenic Organism Breeding, China, initiated in 2008. In this review, wheat genetic transformation platform improvement and transgenic research progresses including new techniques applied and functional studies of wheat quality, yield and stress tolerant related genes and biosafety assessment are summarized. The existing problems and the trends in wheat transformation with traditional methods combined with genomic studies and genome editing technology are also discussed.  相似文献   

Atmosphere. Forecasting hurricane intensity and impacts     

Willoughby HE 《Science (New York, N.Y.)》2007,315(5816):1232-1233

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Quantification of stress sensitive markers in single fecal samples do not accurately predict excretion of these in the pig   总被引：1，自引：0，他引：1  

Carlsson HE  Lyberg K  Royo F  Hau J 《Research in veterinary science》2007,82(3):423-428

All feces produced during 24 h were collected from five pigs and cortisol and immunoreactive cortisol metabolites (CICM), and IgA were quantified. Within pigs, the concentrations of CICM and IgA varied extensively between random samples obtained from a single fecal dropping, and deviated in most cases significantly from the true concentration measured in total fecal output (CV 6.7-130%). The CICM and IgA contents varied considerably (CV 8.1-114%) within and between individual fecal droppings from the same pig compared to the total fecal excretion. In conclusion, single random samples could not be used to reliably quantify the total fecal concentration or excretion of CICM or IgA in pigs. Analyses of all feces collected during shorter periods than 24 h did not provide an accurate estimate of the daily excretion of CICM. Thus, the concentration of stress sensitive molecules in random single fecal samples as an indicator of animal welfare should be interpreted with prudence.  相似文献   

System of Scanning Tunneling Microscope     

YANG Xue-heng  CHEN An  HE Guang-hong  FENG Xiao-juan  WANG Ying-fang  ZHAN Jie  TANG Zhi-liang 《保鲜与加工》2001,(3):137-141

Some ideas are given about using out-clock, CPU and anti-T-net of D/A card for getting to the intelligent control of scanning voltage ,low-filter and hign-filter of STM; logarithm amplifier for tunnelling current contraction. At last, some applications and questions when it running about STM are discussed.  相似文献   

Distributed Power Flow Method Based on Ward Equivalent     

YAN Wei  HE Ning 《保鲜与加工》2006,(11):36-40

With interconnecting and developing of power system, the problem of power flow computation on dispersed data resource need to be solved. A new distributed computation method of power flow based on Ward equivalent is presented. According to master-slaver splitting principle, multi-area interconnected power system is divided into master-slaver areas. Boundary buses in different areas are defined as different bus-types. Neighborhood areas are equivalent by Ward equivalent principle, and the equivalent injection power and equivalent impedance are worked out. Power flows from master area to slaver areas are solved by Newton method, and the equivalent injection power and equivalent impedance on the boundary are modified by their solutions. The process above repeats until to convergence. The proposed distributed power flow method takes full advantage of the information of power, voltage, network configuration in neighborhood areas, so it is better on convergence and quality of solution. The proposed algorithm is testified by IEEE 14-bus system and a practical 181-bus system.  相似文献