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Now showing items 11-20 of 47
Influence of storage at freezing and subsequent refrigeration temperatures on B-galactosidase activity of Lactobacillus acidophilus
(American Society for Microbiology, 1988-04)
The ability of three strains of Lactobacillus acidophilus to survive and retain β-galactosidase activity during storage in liquid nitrogen at −196°C and during subsequent storage in milk at 5°C was tested. The level of ...
Measurement of the velocity distribution of sputtered Na atoms from NaCl by Doppler shift laser fluorescence
(AIP Publishing, 1981-11-01)
The velocity distribution of sputtered Na atoms from NaCI during 15 keV, Ar+ bombardment was measured by a Doppler shift laser fluorescence technique. Contrary to other measurements, the sputtered Na atoms were found to ...
Effects of norfloxacin on DNA metabolism in Pseudomonas aeruginosa
(American Society for Microbiology, 1986-01)
Norfloxacin is a quinolone (pyridonecarboxylic acid derivative) effective against Pseudomonas aeruginosa infections. We studied the effects of this drug on DNA metabolism in P. aeruginosa. Norfloxacin inhibits DNA replication ...
Presence of common antigens, including major surface protein epitopes, between the cattle (intraerythrocytic) and tick stages of Anaplasma marginale
(American Society for Microbiology, 1985-12)
Epitopes of major surface proteins of the intraerythrocytic cattle stage of Anaplasma marginale were demonstrated in the midgut stage of the organism within the infective tick host Dermacentor andersoni. These proteins ...
Far infrared spectroscopy with subpicosecond electrical pulses on transmission lines
(AIP Publishing, 1987-08-17)
Optically generated and detected electrical pulses on transmission lines in the subpicosecond range have frequencies extending up to 1 THz, thereby covering the far infrared region of the spectrum from 0 to 30 cm^-1. We ...
Point source terahertz optics
(AIP Publishing, 1988-10-17)
We demonstrate an ultrafast 10 micro-m sized, electric dipole source of terahertz radiation closely coupled to a 1 cm spherical mirror. This optical approach has the advantages of subpicosecond response times with essentially ...
Effect of repeated in vitro transfer of Pasteurella haemolytica A1 on encapsulation, leukotoxin production, and virulence
(American Society for Microbiology, 1987-01)
Pasteurella haemolytica serotype 1 was transferred daily for 128 serial passages on both unsupplemented brain heart infusion agar and the same basal medium supplemented with bovine blood, horse serum, and yeast extract. ...
Observation of the formation of an optical intensity shock and wave breaking in the nonlinear propagation of pulses in optical fibers
(American Physical Society, 1989-01-30)
We have observed the formation of an optical intensity shock and the subsequent wave breaking in the nonlinear propagation of 1-psec pulses in an optical fiber. The wave breaking manifests itself as the appearance of ...
Susceptibility of feline herpesvirus 1 and a feline calicivirus to feline interferon and recombinant human leukocyte interferons
(American Society for Microbiology, 1985-11)
Feline lung monolayer cultures were treated with either a feline interferon (IFN) or one of two recombinant human alpha-IFNs and then challenged with feline herpesvirus 1 (FHV-1), feline calicivirus (F-9 strain), or vesicular ...
Enzyme-linked immunosorbent assay for detection of serum antibodies to Pasteurella haemolytica cytotoxin (leukotoxin) in cattle
(American Society for Microbiology, 1986-08)
An enzyme-linked immunosorbent assay (ELISA) was developed for detection of bovine serum antibodies to the cytotoxin (leukotoxin) of Pasteurela haemolytica. A partially purified, cytotoxic, and immunogenic protein obtained ...