نتایج جستجو برای: autoclave
تعداد نتایج: 1241 فیلتر نتایج به سال:
A quick method involving the control of heat and water vapor pressure for preparing moisture-saturated carbon fiber-reinforced plastics (CFRP, 8 unidirectional prepreg layers, 1.5 mm thickness, epoxy resin) has been developed. The moisture-saturated CFRP sample was obtained at 120 ̋C and 0.2 MPa water vapor in 72 h by this method using a sterilizer (autoclave). The bending strength and viscoela...
Herbicide atrazine easily leaches to groundwater, where it is persistent. We studied whether sonication accelerates atrazine dissipation (100 mg·L−1) in vadose zone sediment slurries. Sediments were from 11.3 to 14.6 m depths in an atrazine-contaminated groundwater area. The slurries and autoclave-sterilized slurries were sonicated (bath, 43 kHz, 320 W) for 0, 5, 10, 20, or 30 min once/twice a ...
We compared two insecticidal and eight noninsecticidal soil isolates of Bacillus thuringiensis with regard to the solubility of their proteinaceous crystals at alkaline pH values. The protein disulfide contents of the insecticidal and noninsecticidal crystals were equivalent. However, six of the noninsecticidal crystals were soluble only at pH values of >/=12. This lack of solubility contribute...
The tooling CCDR cost category is divided into two groups, design and fabrication. Tooling also has recurring and nonrecurring aspects. Tooling in the CCDR sense refers to the special tools and equipment unique to a particular weapons system. General-purpose tooling (cranes, autoclaves) usable for different products is normally accounted for in the factory overhead category. Nonrecurring toolin...
In this study, a novel method was proposed to synthesize high quality Zn-doped CuInS₂ nanocrystals under high frequency magnetic field at ambient conditions. The magnetic Zn-doping gave superparamagnetic heating of the resulting nanocrystals via magnetic induction, causing an accelerating growth rate of the doped CuInS₂ under ambient conditions faster than conventional autoclave synthesis. Shap...
Effect of Sterilization by Dry Heat or Autoclaving on Bacterial Penetration through Berea Sandstone.
A study was undertaken to determine why bacteria could penetrate lengths of consolidated sandstone (Berea) faster when the sandstone was sterilized by autoclaving than when dry heat (150 degrees C, 3 h) was used. Changes in permeability, porosity, and pore entrance size of the rock as a result of autoclaving were not sufficient to explain the differences in penetration times observed, but elect...
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