Haemoglobin and packed cell volume of yaks at high altitude     

H. WINTER  U. TSHEWANG  BJ GURUNG  AW BEATTIE 《Australian veterinary journal》1989,66(9):299-301

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Top 20 environmental weeds for classical biological control in Europe: a review of opportunities, regulations and other barriers to adoption   总被引：4，自引：3，他引：4  

AW SHEPPARD  RH SHAW†  & R SFORZA‡ 《Weed Research》2006,46(2):93-117

Classical biological control remains the only tool available for permanent ecological and economic management of invasive alien species that flourish through absence of their co‐evolved natural enemies. As such, this approach is recognized as a key tool for alien species management by the Convention on Biological Diversity (CBD), the European and Mediterranean Plant Protection Organization (EPPO) and the European Strategy on Invasive Alien Species (ESIAS). Successful classical biological control programmes abound around the world, despite disproportionate attention being given to occasional and predictable non‐target impacts. Despite more than 130 case histories in Europe against insect pests, no exotic classical biological control agent has been released in the EU against an alien invasive weed. This dearth has occurred in the face of increasing numbers of exotic invasive plants being imported and taking over National Parks, forests and amenity areas in this region, as well as a global increase in the use of classical biological control around the world. This paper reviews potential European weed targets for classical biological control from ecological and socioeconomic perspectives using the criteria of historical biological control success, taxonomic isolation from European native flora, likely availability of biological control agents, invasiveness outside Europe and value to primary industry and horticulture (potential for conflicts of interest). We also review why classical biological control of European exotic plants remains untested, considering problems of funding and public perception. Finally, we consider the regulatory framework that surrounds such biological control activities within constituent countries of the EU to suggest how this approach may be adopted in the future for managing invasive exotic weeds in Europe.  相似文献   

Trachymene glaucifolia associated with bentleg in lambs     

AW PHILBEY 《Australian veterinary journal》1990,67(12):468-468

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Estimating butterfly numbers     

J.F.D. Frazer 《Biological conservation》1973,5(4):271-276

While various experimental methods may show the number of butterflies in a given area, this, of itself, is no pointer either to general scarcity or to the reverse. Even less can it be taken as being the result of a particular set of outside influences. However, low levels in certain (otherwise plentiful) species may be taken as indicating unsuitable management trends.  相似文献   

Skeletal myopathy induced by monensin in adult turkeys     

AW PHILBEY 《Australian veterinary journal》1991,68(7):250-251

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Conception rates in European fallow does (Dama dama dama) following intrauterine insemination with frozen-thawed semen from Mesopotamian fallow (Dama dama mesopotamica) and crossbred (Dama dama dama x Dama dama mesopotamica) bucks     

GE MYLREA  G. EVANS†  AW ENGLISH 《Australian veterinary journal》1991,68(9):294-295

Ninety eight parous fallow does received laparoscopic intrauterine insemination of frozen-thawed semen at one of 2 fixed intervals following oestrus synchronisation treatment. Semen was collected from a Mesopotamian (Dama dama mesopotamica) and a crossbred (F1) (Dama dama dama x Dama dama mesopotamica) fallow buck. Does were inseminated at either 56 or 66 hours after the removal of an intravaginal controlled internal drug releasing device. Eighty eight does received a single straw of frozen-thawed semen containing a total of 50 x 10(6) spermatozoa, while the remaining 10 received split straws containing 25 x 10(6) spermatozoa. Overall, the use of F1 semen containing 50 x 10(6) spermatozoa resulted in a 68% (17/25) conception rate compared with the Mesopotamian semen, which resulted in a 41% (26/63) conception rate. Conceptions were also achieved using 25 x 10(6) spermatozoa of either Mesopotamian or F1 semen (3/8 versus 2/2, respectively). Overall, the conception rate was higher for F1 than Mesopotamian semen (P less than 0.025) and there was a significant interaction with time of insemination (P less than 0.05); for F1 semen there was no difference in conception rate at the 2 insemination times, but for Mesopotamian semen conception was significantly higher (P less than 0.005) following insemination at 66 hours than at 56 hours.  相似文献   

A VISUAL PHENOMENON     

Frazer P 《Science (New York, N.Y.)》1903,18(466):729-731

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The International Geological Congress in Washington     

Frazer P 《Science (New York, N.Y.)》1891,18(457):258-259

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Phase chemistry, structure, and radiation effects in lunar samples     

Arrhenius G  Asunmaa S  Drever JI  Everson J  Fitzgerald RW  Frazer JZ  Fujita H  Hanor JS  Lal D  Liang SS  Macdougall D  Reid AM  Sinkankas J  Wilkening L 《Science (New York, N.Y.)》1970,167(3918):659-661

Phase chemistry, structure, and radiation effects were studied in rock, breccia, and soil samples. The regolith apparently developed in the final stages of accretion and was modified by later impact processes and radiation weathering. Exposure ages indicate transfer of buried igneous rock fragments to the near surface late in lunar history. With a few exceptions igneous rock fragments, soil, and breccia share the same distinctive chemistry, probably acquired before accretion of the moon. The igneous rocks texturally resemble basaltic achondrites, and the soil and breccias contain glassy spheres analogous to chondrules.  相似文献   

Simultaneous identification of soyasaponins and isoflavones and quantification of soyasaponin Bb in soy products,using liquid chromatography/electrospray ionization-mass spectrometry     

Dalluge JJ  Eliason E  Frazer S 《Journal of agricultural and food chemistry》2003,51(12):3520-3524

A method has been developed for simultaneous identification of soyasaponins and soy isoflavones in soy products, based on liquid chromatography/electrospray ionization-mass spectrometry (LC/ESI-MS). Soy-based nutraceutical products were analyzed by LC/ESI-MS with detection of protonated and sodiated molecular ions, as well as characteristic fragment ions for these compounds. Soy isoflavones were characterized by a strong protonated molecular ion in addition to corresponding [aglycone + H](+) ions. Monitoring the soyasaponin-specific protonated aglycone and dehydrated aglycone ions throughout the chromatogram provided a unique fingerprint for soyasaponin content in the samples. This mass spectrometric fingerprint also allowed immediate classification of the soyasaponin analytes as group A or B soyasaponins, based on the unique masses of aglycone ions observed for each class. Quantification of soyasaponin B(b) in soy-derived materials, based on the use of a purified soyasaponin B(b) standard and a glycyrrhizin internal standard, has been accomplished.  相似文献