Effect of an oil heat treatment on the teachability and biological resistance of boric acid impregnated wood   总被引：1，自引：0，他引：1  

Florent Lyon  Marie-France Thevenon  Won-Joung Hwang  Yuji Imamura  Joseph Gril  Antonio Pizzi 《Annals of Forest Science》2007,64(6):673-678

Vegetable oils provide boron retention of about 30% of initial amount depending on oil drying properties. Linseed oil is the most efficient, followed by soybean oil and rapeseed oil. Durability of C. japonica and F. crenata wood specimens has been enhanced by application of linseed oil alone but not enough to reduce termite’s attack of Coptotermes formosanus. Treating wood with a 1.0% w/w boric acid solution prior to oil treatment protects C. japonica from termite and fungi degradations. Efficiency against termites is mainly due to boron retention by oil but hydrophobic oil also forms a barrier decreasing fungi penetration. Boron efficacy threshold around 0.7 kg/m³BAE, lower than classical boron treatments thresholds indicates that oil water-repellence reinforces boron biostatic effect.  相似文献   

A fracture mechanics approach to the tensile strength perpendicular to grain of dimension lumber     

A. P. Schniewind  D. E. Lyon 《Wood Science and Technology》1973,7(1):45-59

Summary Six hundred short sections taken from 23 flatsawn 2x12-inch planks of construction grade Doughas-fir were tested in tension perpendicular to grain. Most of the specimens contained defects in the form of checks, knots, resin streaks, pitch pockets, and pith. Checks were found to be the major strength-reducing defect. The effect of checks could be analyzed effectively by using the concepts of fracture mechanics.  相似文献   

Effects of Drying Conditions,Final Moisture Content,and Degree of Milling on Rice Flavor     

Elaine T. Champagne  Karen L. Bett  Bryan T. Vinyard  Bill D. Webb  Anna M. McClung  Franklin E. Barton  Brenda G. Lyon  Karen Moldenhauer  Steve Linscombe  David Kohlwey 《Cereal Chemistry》1997,74(5):566-570

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Pleistocene extinction of genyornis newtoni: human impact on australian megafauna     

GH Miller  JW Magee  BJ Johnson  ML Fogel  NA Spooner  MT McCulloch  LK Ayliffe 《Science (New York, N.Y.)》1999,283(5399):205-208

More than 85 percent of Australian terrestrial genera with a body mass exceeding 44 kilograms became extinct in the Late Pleistocene. Although most were marsupials, the list includes the large, flightless mihirung Genyornis newtoni. More than 700 dates onGenyornis eggshells from three different climate regions document the continuous presence of Genyornis from more than 100,000 years ago until their sudden disappearance 50,000 years ago, about the same time that humans arrived in Australia. Simultaneous extinction of Genyornis at all sites during an interval of modest climate change implies that human impact, not climate, was responsible.  相似文献   

大丽轮枝菌核糖体基因ITS区段的特异扩增   总被引：11，自引：0，他引：11  

朱有勇  王云月  Bruce R.Lyon 《植物病理学报》1999,29(3):250-255

 根据棉花黄萎病菌(Verticillium dahliae)核糖体基因ITS区段的碱基编码序列,设计合成了1对为26 bp的PCR特异扩增引物(引物1:5'CATCAGTCTCTCTGTTTATACCAACG,和引物2:3'CGATGCGAGCTGTAACTACTACGCAA),进行了大丽轮枝病菌PCR特异扩增试验。试验结果表明:本试验设计合成的这对引物,能对大丽轮枝菌全基因组DNA和人工接种棉花黄萎病病株组织特异地扩增到大丽轮枝菌核糖体基因ITS区段的324 bp分子片段,该对引物可用于棉花黄萎病的分子鉴定和分子监测。本试验结果对棉花黄萎病的早期诊断和病原菌的检测和监测有潜在的应用价值。  相似文献   

澳大利亚棉花黄萎病菌致病性鉴定研究     

王云月 Dilb.  SM 《云南农业大学学报(自然科学版)》1998,13(4):369-374

 在温室人工接种鉴定了澳大利亚16个棉花种植地区30个棉花黄萎病菌株的致病性.结果表明:根据人工接种5个棉花品种的抗感反应和病情指数,30个供试菌株划分为4种致病类型.致病类型I(3个菌株)具有较强的致病能力,致病类型Ⅳ(5个菌株)的致病能力较弱.致病类型Ⅱ(12个菌株)和致病类型Ⅲ(10个菌株)的致病能力中等,为澳大利亚棉花种植地区的主要菌系类型.  相似文献   

Intra-articular Sea Urchin Spine/Foreign Body Evaluation: Ultrasound Versus Fluoroscopy     

Blake J. Illston  Michael J. Caudell  Matthew L. Lyon  Jason DiCarlo  Robert D'Zio 《The Forestry Chronicle》2010,21(1):68-69

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Update on the diagnosis and management of Neospora caninum infections in dogs     

Lyon C 《Topics in companion animal medicine》2010,25(3):170-175

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Pet avian medicine. Sources of information.     

K Lyon 《Veterinary Clinics of North America: Small Animal Practice》1991,21(6):1111-1120

This article is intended to serve as a guide to sources of information on avians. College and university libraries, abstract and index services, bookstores, journals, and veterinary literature are listed. Avian conferences, computer search services, natural history libraries and museums, and places to obtain video and audio tapes and slides are included.  相似文献   

Angiostrongylosis in dogs in Sydney     

GH COLLINS  TLW ROTHWELL  R MALKI  DB CHURCH  MK DOWDEN 《Australian veterinary journal》1992,69(7):170-171

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