Initiation of angiogenesis by human follicular fluid   总被引：3，自引：0，他引：3  

J L Frederick  T Shimanuki  G S diZerega 《Science (New York, N.Y.)》1984,224(4647):389-390

Angiogenesis was observed and measured after injection of human follicular fluid into rabbit corneas. Undiluted human follicular fluid stimulated angiogenesis in every case, with new blood vessels visible 3 days after injection and extending 2.0 millimeters from the corneal scleral limbus into the injection site by day 15. Stimulation of angiogenesis was lost by heating or diluting the follicular fluid but was retained after charcoal stripping or dialysis. Human follicular fluid contains an angiogenic factor that may be associated with perifollicular neovascularization during folliculogenesis.  相似文献   

Response:ultraviolet levels under sea ice during the antarctic spring     

Frederick JE 《Science (New York, N.Y.)》1989,245(4914):195

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Regulation of social research     

Mosteller F 《Science (New York, N.Y.)》1980,208(4449):1219

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An emerging veterinary and potentially zoonotic streptococcus     

Quinn FD 《Veterinary journal (London, England : 1997)》2011,188(2):132-133

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Adsorption of bacteria on soils: Experiments,thermodynamic rationale,and application     

David W. Hendricks  Frederick J. Post  Deorao R. Khairnar 《Water, air, and soil pollution》1979,12(2):219-232

A model for the adsorption of bacteria to soil particles is described using the physical-chemical Langmuir isotherm and the van't Hoff equation. An example of the use of the model for assessing bacterial movement through soil is provided.Staphylococcus aureus was the sorbate with sorbents of activated charcoal, kaolinite clay, Mendon silt loam, and silica sand. Competitive agents sodium lauryl sulfate, sodium chloride, and peptone were also studied. Peptone was the most successful competitor with the bacteria for sites on the sorbent.  相似文献   

Platy Quartz Phytoliths found in the Fossil Forest Deposits,Axel Heiberg Island,Northwest Territories,Canada     

Hideomi Kodama  Catherine A. Fox  Charles Tarnocai  Frederick J. Longstaffe 《植物养料与土壤学杂志》1992,155(5):401-406

The occurrence of quartz particles having a platy morphology found in the white layers within the fossil forest deposits of Axel Heiberg Island, was further confirmed by optical and electron microscopic examinations. The platy quartz crystals were concentrated in the finer fractions. The δ ₁₈O values of fractions enriched in platy quartz crystals ranged from +13.7 to +16.6 %₀. These values were higher than those obtained for coarser fractions. The platy morphology and crystallographic character of the quartz particles concentrated in the finer size fractions are uncharacteristic both of aerosol derived material and of secondary silica. These findings and information available for the paleoenvironment of the study area favor a biogenic origin for the platy quartz. The oxygen-isotope data are consistent with this hypothesis.  相似文献   

Restoring the capacity of spent mushroom compost to treat coal mine drainage by reducing the inflow rate: A microcosm experiment     

Lloyd R. Stark  William R. Wenerick  Frederick M. Williams  S. Edward Stevens Jr.  Paul J. Wuest 《Water, air, and soil pollution》1994,75(3-4):405-420

Four volumes of spent mushroom compost were exposed to synthetic coal mine drainage (pH 3.5, 48 mg L^?1 Fe, 22 mg L^?1 Mn) under oxidizing conditions (Eh 300 to 400 mV) at a relatively high rate of flow. After 15 days, the compost lost its ability to elevate pH, to lower the redox potential, to lower outlet iron concentrations, and to lower manganese concentrations, with larger volumes retaining more Fe and H⁺, but less Mn. Estimated retention maxima per liter of spent mushroom compost were 281 μeq H⁺, 5.56 g Fe, and 0.15 g Mn. These values are similar to those reported elsewhere for peat. The ‘saturated’ compost was then mixed and exposed to mine water in order to eliminate ‘dead zones’ in the compost. Subsequently, the compost was re-exposed to synthetic mine water (pH 4.0, 60 mg L^?1 Fe, O mg L^?1 Mn) under a much lower flow rate and less oxidizing regime for a period of 114 days. Under the low flow regime, iron was first exported from the compost as reducing conditions were established, and then retained on a stable basis. In addition, Eh was lowered and pH was elevated by the compost. On a net basis, the capacity of the compost to retain iron was increased and apparently stable under the decreased flow conditions.  相似文献   

Fenthion poisoning of native birds in southern Queensland     

RA McKENZIE  AEL LANHAM  JD TAYLOR  JA GIBSON  RJ PIERCE 《Australian veterinary journal》1996,74(4):321-323

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Fracture of the patella as a possible complication of medial patellar desmotomy     

JD WRIGHT  RJ ROSE 《Australian veterinary journal》1989,66(6):189-190

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Systemic candidiasis in a Suffolk ram     

TF JUBB  JD BAIRD  DH PERCY 《Australian veterinary journal》1988,65(10):333-335

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