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Biomedical subjects

C Becher

Publications and source records attributed to C Becher.

8 recordsLinked to original sources
PubMed2000

A quantum dot single-photon turnstile device.

Quantum communication relies on the availability of light pulses with strong quantum correlations among photons. An example of such an optical source is a single-photon pulse with a vanishing probability for detecting two or more photons. Using pulsed laser excitation of a single quantum dot, a single-photon turnstile device that generates a train of single-photon pulses was demonstrated. For a spectrally isolated quantum dot, nearly 100% of the excitation pulses lead to emission of a single photon, yielding an ideal single-photon source.

Journal Article↗
PubMed1998

Wards. Caring about sharing.

A small study of surgical patients in one hospital showed that most women preferred single-sex wards. But more than half the men had no preference. Most day-case patients wanted single-sex accommodation. Patients whose stay was seven days or longer showed greater tolerance of mixed-sex wards than others.

Adolescent↗
PubMed1996

Evaluation of commercial kits for quantitative identification and tests on antibiotic susceptibility of genital mycoplasmas.

In this study, commercial media and kits for identification and tests for antibiotic susceptibility of genital mycoplasmas were evaluated in comparison to standardized methods. A total of 298 specimens was routinely enrolled. Our results showed that all media corresponded for qualitative and semiquantitative identification with a specificity of 100% for both microorganisms and a sensitivity of 94% for U. urealyticum and of 88% for M. hominis. Standard methods were superior to commercial kits for qualitative and quantitative identification (sensitivity 85-97% for U. urealyticum and 79-83% for M. hominis). There were large discrepancies when testing antibiotic susceptibility.

Anti-Bacterial Agents↗
PubMed1987

[Microflora in a controlled caries model study in rats].

Changes of dental plaque were investigated in Osborne-Mendel-rats under the influence of a sucrose-containing diet as well as the inhibition of it by antibiotics (streptomycin, erythromycin, penicillin) in order to find out the optimal conditions of animal association with Str. mutans (OMZ 176). The cariogenic diet did not alter the isolated total germ numbers, but modified the flora to a streptococcal one. The application of an erythromycin/penicillin mixture caused a 100 fold decrease of the germ number and streptococcal elimination so that an association of the germ Str. mutans detectable by microbiological methods could take place at this moment. The obtained caries scores differed from the non-contaminated group. Mono-associated gnotobiotic Wistar rats developed more carious lesions than conventional animals of the same strain; therefore Str. mutans OMZ 176 was classified as high cariogenic.

Animals↗