Biomedical subjects

W Chmielewski

Publications and source records attributed to W Chmielewski.

At least 19 recordsLinked to original sources

PubMed1993

Detecting ozone and demonstrating its phytotoxicity in forested areas of Poland: a pilot study.

Ambient concentrations of ozone (O(3)) were measured and O(3) phytotoxicity to tobacco (Nicotiana tabacum L.) was demonstrated in several forest locations in Poland during a pilot study from July-October, 1991. At southern and central locations in Poland, the 24-hour average O(3) concentrations measured with a UV absorption photometer were in the range of 32-55 ppb, and the corresponding 1-hour maxima in the range of 39-83 ppb. At these locations longer period (four to fifteen days) average concentrations were determined using O(3) passive samplers (DGA, Inc.) and were reaching 60 ppb, while at Bialowieza in eastern Poland O(3) concentrations averaged less than 40 ppb. In Szarow, near the Niepolomice Forest in southern Poland, 1-hour O(3) maxima estimated from the data obtained using passive samplers were about 105 ppb in early September. At several locations in southern and central Poland, extensive O(3) injury was determined on O(3)-sensitive Bel W-3 tobacco plants; such injury did not occur in the Bialowieza Forest of eastern Poland. The results of this pilot study indicate that O(3) is present at phytotoxic levels in southern and central Poland.

Journal Article↗

PubMed1993

[A combination of conventional single contrast arthrography with arthro-CT of the shoulder--an evaluation of 78 cases].

For the diagnosis of traumatic shoulder lesions, 78 patients have been examined by conventional single contrast arthrography with subsequent CT. For 26 patients, it was possible to compare the radiological diagnosis with the arthroscopic or surgical findings. The combination of both diagnostic methods provided a high sensitivity (94%) and specificity (100%) for lesions of the ventral or dorsal limbus. Ruptures of the rotator cuff showed a sensitivity of 60% and a specificity of 89%. An unsatisfying sensitivity (60%) with high specificity (95.6%) was observed in the diagnosis of the ventral capsula. A retrospective screening of the roentgenography showed a good detectable leak of contrast medium, which was misinterpreted as being an artefact. All in all, the combination of conventional arthrography in mono-contrast and CT in daily routine should be recommended the diagnosis of traumatic shoulder lesions since it is easy to use, is of low inconvenience for the patient, and provides a high level of information.

Adolescent↗

PubMed1991

[Biological observations of allergenic mites Suidasia nesbitti (Acarida, Saproglyphidae)].

Suidasia nesbitti specimens for laboratory cultures and for biological studies were isolated from infested fish meal. Rearing conditions: temperature +25 degrees C, relative humidity 85%, food - dried baker's yeast. One day old females and males were paired and placed into separate rearing cages and observations of longevity and oviposition of mites were conducted. Fresh laid eggs were observed and mite development cycle was examined. Mean longevity of male (preimaginal + imaginal periods) amount 84.4 days, female in average 67.0 days. Average egg production of female per its whole life was 172.9. Life history took in average 14.4 days and natural mortality of various instars was 25%. Frequency of females was slightly higher than frequency of males.

Animals↗

PubMed1991

[Mites (Acarida) of honey bee (Apis mellifera L.) in Poland].

400 samples of natural winter debris collected from bee hives, 150 samples of stored honey and 100 samples of pollen collected by bees were examined; full of food and empty honey combs, brood and adult bees were also observed. 100% of samples of debris, 90% of pollen and almost 24% of honey samples contained mites; they were found also on honey combs and on died and living bees (brood, imagines). 33 mite species were found. Besides of parasite Varroa jacobsoni Oud. numerous mites belonging to Acaridae, Ameroseiidae, Tarsonemidae and Tydeidae were frequent. They are often accompanied by predatory mites from families Cheyletidae, Aceosejidae, Laelapidae, Bdellidae and Cunaxidae. 3 stated species--Acotyledon paradoxa Oud., Lasioacarus nidicolus Kadz. et Sev. and Thyreophagus odyneri Fain are new for Poland.

Animals↗

PubMed1984

Oral exposure to a nickel-containing dental alloy of persons with hypersensitive skin reactions to nickel.

In 10 partially dentate subjects, all with long histories of skin reactions to nickel, prosthetic treatments were performed with fixed prosthetic appliances manufactured in a dental alloy containing 66% nickel. During time periods varying from 12 to over 40 months, these subjects were controlled using a variety of dental and medical methods. Neither adverse general nor oral clinical nor histological reactions were noted during the observation.

Adult↗

PubMed1983

Experimental investigations on sensitivity to nickel present in alloys used in dentistry carried out on guinea pigs previously sensitized to this metal.

Experimental investigation on sensitivity to nickel present in dental alloys has been carried out on guinea pigs previously sensitized to this metal. The metal plates containing nickel have been sutured to the oral mucosa in such a way that condition of alloys contact with mucosa were possible similar to those present in the mouth of the patient wearing fixed prosthesis. The results of macro and micro examination has not shown any morphological differences between experimental and control material.

Animals↗

PubMed1977