Biomedical subjects

W F Brinkman

Publications and source records attributed to W F Brinkman.

11 recordsLinked to original sources

PubMed2005

Thermodynamics of an incommensurate quantum crystal.

We present a theory of the thermodynamics of an incommensurate quantum solid. The ground state of the solid is assumed to be an incommensurate crystal, with quantum zero-point vacancies and interstitials and thus a non-integer number of atoms per unit cell. We show that at low temperature T, the variation of the net vacancy concentration should be as T4 and that the first correction to the specific heat due to this varies as T7; these are quite consistent with experiments on solid helium-4. We also make some observations about the recent experimental reports of "supersolidity" in solid helium-4 that motivate a renewed interest in quantum crystals.

Journal Article↗

PubMed1983

Findings in surgery for chronic otitis media. A retrospective data-analysis of 2225 cases followed for 2 years.

Data on middle ear disease and follow-up was recorded and analysed in 2225 ears operated on for chronic otitis media between 1958 and 1975. The closure rate of tympanic membrane perforations (70-80%) was not influenced by the presence of otorrhoea, but it was significantly lower in patients aged below 15 or over 40 yr and especially when tympanic membrane homograft had been used. For all types of tympanoplasty the mean improvement in air-conduction threshold was most marked at the lower frequencies, being some 10 dB in Type I, 15 dB in Type II and 8 dB in Type III and IV and it decreased by some 3 dB per octave. The combination of cholesteatoma and tympanosclerosis appeared to be rare. The post-operative incidence of otorrhoea was 10-15% after modified radical mastoidectomy and 20-25% after radical mastoidectomy.

Chronic Disease↗

PubMed1979

Congenital laryngeal defects.

Embryologic disorders of the larynx are rare. The main symptoms are stridor and hoarseness, symptoms which in the newborn always necessitate further investigation. Both the laryngotracheo-esophageal cleft and the congenital laryngeal web are discussed in relation to the embryologic development of the larynx and to diagnosis and therapy. The use of the operating microscope is stressed.

Esophagus↗

PubMed1979

[Is there such a thing as presbyacusia?].

The term presbyacusis is misused in many cases. Aging is accompanied by a number of known and probably unknown processes that are more or less harmful for our hearing aquity. We all carry to our senium the cumulation of harms done to our hearing aquity in lifetime (Schmidt, 1966). Such as noise trauma, metabolic derangements, infections, and so on. Further investigations will make it possible in the future to come to a specific diagnosis that will lead to a better understanding of pathogenesis and pathology.

Aging↗

PubMed1974