PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 6371243

Beryllium coating for biological X-ray microanalysis.

A T Marshall·D Carde
View original source ↗Export metadata ↓

Abstract

Beryllium is ideal for coating biological specimens for light element X-ray microanalysis at low temperature. It has higher electrical and thermal conductivity at 100 K and lower absorption of X-rays of biological interest than carbon, aluminium or chromium. It produces no detectable characteristic X-rays. When adequate precautions are taken beryllium is a valuable alternative to other coating materials. Because of its toxicity, however, it should not be used indiscriminately.

Explore related subjects

BerylliumElectric ConductivityElectron Probe MicroanalysisHistological TechniquesThermal ConductivityJournal ArticleResearch Support, Non-U.S. Gov't

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

A T Marshall, D Carde. 1984. Beryllium coating for biological X-ray microanalysis.. https://doi.org/10.1111/j.1365-2818.1984.tb00509.x

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2007

Treatment of 153 Japanese patients with Q-switched alexandrite laser.

We have recently used Q-switched alexandrite laser for the treatment of various kinds of pigmented skin lesions. We retrospectively compared therapeutic outcomes of 153 Japanese patients who consulted our department. This approach was not very efficient for nevus spilus/café-au-lait spots, which seemed laser-resistant, especially when the pigmentation had appeared after 1 year of age, was treated after 5 years of age, was located on the face, was oval with a smooth border, and the patient was male. This approach was equally effective for senile lentigo, nevus of Ota, and Mongolian spots, but less effective for acquired bilateral nevus of Ota-like macules. Some patients with sacral Mongolian spots or those with light-colored, senile lentigo developed severe post-inflammatory hyperpigmentation after treatment. As a whole, good therapeutic outcome was achieved after multiple treatment sessions. However, the use of other lasers or other treatment modalities should be considered to treat nevus spilus/café-au-lait spots.

Beryllium↗
PubMed2007

Exposure to beryllium and occurrence of lung cancer: a reexamination of findings from a nested case-control study.

OBJECTIVE: Our aim was to reanalyze a nested case-control study of beryllium and lung cancer because we identified analysis and study design issues that could have led to the elevated odds ratios obtained in the study. METHODS: We reanalyzed the data using nontransformed exposure metrics instead of log-transformed metrics used in the publication. We identified and examined effects on estimated odds ratios of imbalances between cases and controls caused by the control selection method. RESULTS: This reanalysis found no elevated odds ratios for any exposure variable. CONCLUSION: : Our conclusions differ from the authors' interpretation that the findings are due to a causal relationship between beryllium exposure and lung cancer. Our alternative explanation is that they may be due to methodological problems that could have been controlled by closer matching of controls to cases. CLINICAL SIGNIFICANCE: This study challenges conclusions made from a large case-control study concerning beryllium-lung cancer associations. Occupational medicine practitioners may want to integrate findings from this study into advice they give beryllium-exposed workers concerned about lung cancer.

Beryllium↗
PubMed2006

Micellanized spectrophotometric method for the determination of beryllium using haematoxylin.

A simple and sensitized spectrophotometric method for the determination of trace amounts of beryllium has been described. The method is based on the formation of a ternary complex by the reaction of beryllium with haematoxylin in the presence of micellar medium (cationic surfactant, cetyltrimethylammonium bromide). The ternary complex of beryllium has a maximum absorbance at 592 nm and showed an excellent sensitivity (molar absorption coefficient of 7.07 x 10(4)L mol(-1)cm(-1) and the Sandell's sensitivity being 1.27 x 10(-4) microg cm(-2)) and reproducibility (within-day precision: R.S.D.<or=0.36%, n=5, between-day precision: R.S.D.<or=0.65%, n=5). Linearity was achieved over the range 0.01-0.1 microg mL(-1) of beryllium with a correlation coefficient of 0.9999. The effect of foreign substances on the determination has been examined. The proposed procedure has been applied to the determination of beryllium in water samples.

Beryllium↗