Biological characterisation of Australian isolates of chicken anaemia agent   总被引：1，自引：0，他引：1  

TJ CONNOR  F. McNEILLY  GA FIRTH†  MS McNULTY† 《Australian veterinary journal》1991,68(6):199-201

Three Australian isolates of chicken anaemia agent (CAA) resisted treatment at 70 degrees C for 5 min and chloroform treatment. Although minor antigenic differences were detected using monoclonal antibodies to CAA, the Australian isolates were indistinguishable from the reference Cux-1 and Gifu-1 isolates in cross-immunofluorescence and cross-neutralisation tests employing polyclonal chicken antiserums. The Australian viruses were pathogenic for intramuscularly inoculated 1-day-old SPF chicks, but were less pathogenic for 7-day-old chicks. Thus the Australian isolates of CAA did not differ significantly in these properties from previously characterised CAA isolates from other continents.  相似文献   

Sea star platastenras: ossicle morphology and taxonomic position     

Blake DB 《Science (New York, N.Y.)》1972,176(4032):306-307

The modern sea star Platasterias latiradiata, on the basis of ossicle morphology, is removed from the fossil subclass Somasteroidea and assigned to the genus Luidia of the living subclass Asteroidea. A somasteroid assignment of this species should not be used in inferences concerning evolution and morphology of primitive echinoderms.  相似文献   

Nicotine blocks the suckling-induced rise in circulating prolactin in lactating rats   总被引：2，自引：0，他引：2  

C A Blake  C H Sawyer 《Science (New York, N.Y.)》1972,177(49):619-621

In lactating rats the rapid suckling-induced release of pituitary prolactin into circulating blood is inhibited by a subcutaneous injection of nicotine. This treatment does not block the lesser "stress-induced" rise in prolactin in response to either. Although nicotine may impair milk production by its effect on prolactin release, it does not appear to block milk ejection from the lactating mammary gland.  相似文献   

Uterine eosinophilia and serum transaminases in cattle with induced early embryonic death     

J W Call  T J Blake  R V Davis 《The Cornell veterinarian》1968,58(2):321-326

  相似文献   

Abortion and public opinion: the 1960-1970 decade   总被引：3，自引：0，他引：3  

J Blake 《Science (New York, N.Y.)》1971,171(971):540-549

  相似文献   

The teenage birth control dilemma and public opinion   总被引：1，自引：0，他引：1  

J Blake 《Science (New York, N.Y.)》1973,180(87):708-712

  相似文献   

Letters to the editor     

Blake J 《Science (New York, N.Y.)》1969,165(3889):122-124

  相似文献   

Perineal urethrostomy in cats   总被引：2，自引：0，他引：2  

J A Blake 《Journal of the American Veterinary Medical Association》1968,152(10):1499-1506

  相似文献   

Comparing micrometeorology of rain forests in Biosphere-2 and Amazon basin     

Muhammad Altaf Arain  William James Shuttleworth  Blake Farnsworth  John Adams  Omer Lutfi Sen 《Agricultural and Forest Meteorology》2000,100(4)

Micrometeorological variables measured in the BIOSPHERE-2 Center (B2C) enclosed rain forest biome for 1 year were compared with similar measurements made in the Amazon rain forest. In the B2C rain forest, the overlying glass and supporting structure significantly reduces (by approximately a factor of two) the incoming solar radiation. Monthly mean values of above-canopy and within-canopy air temperature, vapor pressure, and vapor pressure deficit are reasonably similar to those of the Amazon rain forest, but there are marked differences in the above-canopy values of these variables in the Arizona summer. Monthly mean diurnal trends also show significant differences. Measurements of vertical air temperature gradient clearly showed two very distinct environments in the 27.4 m high rain forest dome during daylight hours. There is a comparatively cool and fairly well-mixed environment (which is reasonably similar to that found in a natural rain forest) below about 10 m and a hot, thermally stable environment above about 15 m. The nature of the atmospheric turbulence within the B2C rain forest also is significantly different from that normally found in natural rain forests. There is little turbulent mixing above the forest canopy in this enclosed environment. These findings are important for guiding the operation and use of this experimental rain forest facility in future research and for understanding how the rain forest biome functions in an enclosed environment.  相似文献   

Relationship of Dough Extensibility to Dough Strength in a Spring Wheat Cross     

D. Nash  S. P. Lanning  P. Fox  J. M. Martin  N. K. Blake  E. Souza  R. A. Graybosch  M. J. Giroux  L. E. Talbert 《Cereal Chemistry》2006,83(3):255-258

A negative relationship between dough strength and dough extensibility would pose a problem for breeding hard wheats, as both dough strength and dough extensibility are desirable. We derived 77 recombinant inbred lines (RIL) from a cross between hard red spring wheat cultivars McNeal and Thatcher. McNeal produces flour with stronger dough and lower extensibility than does Thatcher. RIL were evaluated for strength‐related properties using mixograph analysis and extensibility parameters using the Kieffer attachment to the TA.XT2 texture analyzer. Additionally, the RIL were test baked. Measurements using the mixograph and the Kieffer attachment were highly heritable. Maximum dough extensibility (Ext_max) was negatively correlated with resistance to extension (R_max) (r = ‐0.74) and with mixograph tolerance (r = ‐0.45). Loaf volume was correlated with both R_max (r = 0.42) and area under the extensigraph curve (r = 0.44) based on partial correlation analysis adjusted for protein differences. Ext_max was negatively correlated with loaf volume (r = ‐0.26). The McNeal allele for polymorphism at the Gli1‐B1 locus on chromosome 1BS caused high dough‐mixing tolerance and low dough extensibility. Our results suggest that traditional selection criteria in hard red spring wheat, including tolerance to dough mixing and high loaf volume, may result in reduced dough extensibility.  相似文献