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Biomedical subjects

H Berger

Publications and source records attributed to H Berger.

At least 307 records · Page 17Linked to original sources
PubMed1979

A new approach to measure restlessness.

A new method to measure restlessness is described. It consists mainly of recording thoracic electrical impedance and measuring the amount of movement artifacts appearing in the pneumographs. Technical equipment and data evaluation are described; an example of typical data is given together with proposals as to how the method may be automated. Potential applications in different fields of interest are described.

Bronchitis↗
PubMed1979

[Automatic recognition of hemisphere-borderlines in cerebral radionuclide angiography (author's transl)].

The diagnostic value of brain perfusion studies with radionuclides is based upon the careful determination of intracerebral vascular supply areas in sequential scintigraphic frames. This paper describes an automatic algorithm to determine cerebral hemisphere-borderlines (Regions of Interest). In 134 randomized brain perfusion studies, regions of interest were set by three techniques: automatically by a computer program at the beginning of the venous phase, automatically by using all images derived from the total bolus passage (40 sec.), and manual marking with a light pen at the beginning of the venous phase. A good correlation of these different techniques was obtained (r = 0.87). Furthermore, we found the bilateral perfusion index independent within a wide range, from the size of the marked regions and the quality of the injected indicator bolus. Time saving and lesser carefulness, concomitant with higher precision and reliability, in addition to the standardisation of the marking technique increase the diagnostic value of cerebral radionuclide angiography.

Brain↗
PubMed1978

Mutation affecting thermostability of sigma subunit of Escherichia coli RNA polymerase lies near the dnaG locus at about 66 min on the E. coli genetic map.

The Escherichia coli strain, ts-rnp5, originally described in 1975 by G. D. Burdick and H. Berger, is shown to possess an RNA polymerase (RNA nucleotidyltransferase) sigma subunit with an activity 4--6 times less thermostable at 45 degrees than sigma from wild-type strains. This defect remains associated with the sigma polypeptide through a variety of purification stages, including renaturation of sigma after its elution from sodium dodecyl sulfate/polyacrylamide gels. The mutation responsible for decreased thermostability of sigma, called rpoD1, cotransduces with dnaG and therefore is located at about 66 min of the E. coli genetic map.

Chromosome Mapping↗
PubMed1978

Effect of Vaporub and petrolatum on frequency and amplitude of breathing in children with acute bronchitis.

Transthoracic impedance pneumographs from sixty children suffering from acute bronchitis were studied to investigate the effect of Vaporub on the amplitude and frequency of breathing. The experimental technique consisted of an observation period of 70 minutes after a 3-minute treatment with Vaporub or petrolatum as a control. Before the treatment, after an adaptation period of 20 minutes, the pneumogram was recorded for 10 minutes, after the treatment pneumograms were recorded for 70 minutes. The pneumograph data demonstrated an early increase in amplitude up to 33.0%, with subsequent return to slightly above control for the remaining test period. Such an increase was not observed in the Petrolatum-treated group. Breathing frequency demonstrated a progressive decrease to 19.4% of the pre-treatment value at the end of the test period, while the Petrolatum controls were between + 3.6 to - 4.2% difference. It is concluded that Vaporub treatment results in a change in breathing patterns. This, together with the clinical observation of the children suggests a condition of 'easier breathing'.

Acute Disease↗
PubMed1978

Effect of Vaporub and petrolatum on skin and rectal temperature in children with acute bronchitis.

Fifty-six children, suffering from acute bronchitis were studied. Skin temperature and rectal temperature were simultaneously recorded over a period of 90 minutes after 3-minute rub therapy on chest and back with either Vaporub or its base Petrolatum. A statistically significant increase in skin temperature as compared to the pre-treatment was observed; with Vaporub, however, the increase was 1.1 degrees C on average at the highest point of a large plateau reaching from 30 to 90 minutes after the treatment. Rubbing Petrolatum alone showed 0.2 degrees C on average on the top of the temperature plateau. Rectal temperature did not show significant changes with either therapy. On comparing temperature data of the same type in healthy children, the time course of the temperature elevation (which also was observed in healthy children after Vaporub treatment), was different from that of bronchitic children. In the bronchitic children the temperature rise was still 0.9 degrees C 60 minutes after treatment. In the healthy children after 60 minutes, the temperature elevation was only 0.4 degrees C above the pre-treatment value.

Acute Disease↗
PubMed1978

Effect of Vaporub on the restlessness of children with acute bronchitis.

In this study pneumographs of children with acute bronchitis treated with Vicks Vaporub or Petrolatum were used. Movement artifacts were used as a measure of the so-called "restlessness" of the children. The experimental schedule consisted of a 10-minute phase of recording before a 3-minute treatment with Vaporub or Petrolatum, followed by a 70-minute observation period, during which time pneumograms were also recorded. Thirty-four Vaporub-treated children showed an increase in periods without movement artifacts of up to 213.8%, the Petrolatum controls, twenty-six children, up to 62.4% as compared to the corresponding pre-treatment values. It is concluded that Vaporub is effective in decreasing restlessness in children suffering from acute bronchitis. This effect is quite marked and cannot be due solely to psychological effects of the rub therapy, or to effects of petrolatum without aromatics.

Acute Disease↗
PubMed1978

[Actinic reticuloid in a florist].

Actinic Reticuloid in a Florist A 63 year old florist developed after primary sensibilisation against Chrysanthemum and other flowers and plants the typical clinical and histological features of an actinic reticuloid with considerably augmented sensitivity to UV A and UV B.

Dermatitis, Contact↗