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M K Brewer

Publications and source records attributed to M K Brewer.

8 recordsLinked to original sources
PubMed1996

The high-latitude cloud MBM 7. I. H I and CO observations.

The high-latitude cloud (HLC) MBM 7 has been observed in the 21 cm H I line and the 12CO(1-0) and 13CO(1-0) lines with similar spatial resolutions. The data reveal a total mass approximately 30 M solar for MBM 7 and a complex morphology. The cloud consists of a cold dense core of 5 M solar surrounded by atomic and molecular gas with about 25 M solar, which is embedded in hotter and more diffuse H I gas. We derive a total column density N(H I + 2H2) of 1 x 10(21) cm-2 toward the center and 1 x 10(20) cm-3 toward the envelope of MBM 7. The CO line indicates the existence of dense cores [n(H2) > or = 2000 cm-3] of size (FWHM) approximately 0.5 pc. The morphology suggests shock compression from the southwest direction, which can form molecular cores along the direction perpendicular to the H I distribution. The H I cloud extends to the northeast, and the velocity gradient appears to be about 2.8 km s-1 pc-1 in this direction, which indicates a systematic outward motion which will disrupt the cloud in approximately 10(6) yr. The observed large line widths of approximately 2 km s-1 for CO suggest that turbulent motions exist in the cloud, and hydrodynamical turbulence may dominate the line broadening. Considering the energy and pressure of MBM 7, the dense cores appear not to be bound by gravity, and the whole cloud including the dense cores seem to be expanding. The distance to HLCs suggest that they belong to the galactic plane, since the scale height of the cloud is < or approximately equal to 100 pc. Compared to the more familiar dense dark clouds, HLCs may differ only in their small mass and low density, with their proximity reducing the filling factor and enhancing the contrast of the core and envelope structure.

Astronomical Phenomena↗
PubMed1991

H2CS abundances and ortho-to-para ratios in interstellar clouds.

Several H2CS ortho and para transitions have been observed toward interstellar molecular clouds, including cold, dark clouds and star-forming regions. We derive H2CS fractional abundances f(H2CS) approximately 1-2 10(-9) relative to molecular hydrogen towards TMC-1, Orion A, and NGC 7538, and approximately 5 10(-10) for L134N. The H2CS ortho-to-para ratios in TMC-1 are approximately 1.8 towards the cyanopolyyne peak and the ammonia peak, which may indicate the thermalization of H2CS on 10 K grains. We derive a ratio of approximately 3, the statistical value, for Orion (3N, 1E) and NGC 7538, while we find a value approximately 2 for Orion (KL).

Astronomical Phenomena↗
PubMed1991

Abundance and chemistry of interstellar HOCO+.

We derive HOCO+ column densities approximately 10(15) cm-2 toward the Galactic center and < or = 10(12) cm-2 for cold dark clouds from observations and an LVG model. We mapped the HOCO+ 4(04)-3(03) line toward Sgr A. The fractional abundance of HOCO+ in the Galactic center region is three orders of magnitude larger than predicted by quiescent ion-molecule chemistry and an order of magnitude larger than predicted by a MHD shock model. If HOCO+ traces interstellar CO2, the implied high abundance ([CO2] approximately [CO]) in the Galactic center may result from UV photolysis of grain mantles.

Astronomical Phenomena↗
PubMed1977

Mechanical random access of blood bank records.

A filing system of cumulative patient record cards is described for use by large or active blood banks. Cards are retrieved for review of patient identification, past transfusion history, and legally necessary documentation of test results. Information on the cards is handwritten (as is required in most blood banks) only once, reducing transcription error. Card acquisition depends on an electromechanical delivery system, which is selectively activated by a programmed key-stroke sequence. Cards are filed and accessed randomly so that records cannot be lost. A backup system for delivery permits certainty of retrieval of records. The system contains 40,000 complete patient records on line, can easily be expanded, may be linked to off-line files or a computer, and is simple to operate.

Blood Banks↗
PubMedDate not supplied

The relationship between self-esteem, health habits, and knowledge of BSE practice in female inmates.

This article reports on data derived from an investigation of the self-esteem, health habits, and knowledge of breast self-examination (BSE) practice in female inmates. A descriptive correlational study was conducted with a prison sample of 197 adult females incarcerated in a women's state prison. Major findings of the study suggest that female inmates in general had medium to high self-esteem, poor health habits before incarceration, and minimal knowledge about BSE practice. Only 26% reported correct knowledge related to frequency in BSE practice, and few reported that they knew correct BSE technique. In addition, findings suggest that a correlation does not exist between self-esteem and knowledge of BSE practice, and participants' last grade completed served as a good predictor of women's knowledge of BSE practice.

Adult↗
PubMedDate not supplied

Surveillance for posttransfusion hepatitis by a community hospital. Another view.

A critical appraisal of a recent AABB recommendation for hepatitis surveillance was undertaken. As part of the program, a formal, mailed inquiry was sent to physicians whose patients were transfused six months earlier. The replies did not provide an effective means of detecting posttransfusion hepatitis, and cost of the program was high. Although the method served as a useful reminder to physicians that transfusion-associated hepatitis is a reportable disease, caution is warranted in implementing such screening.

Anemia, Hemolytic↗
PubMedDate not supplied

Automated suspension of washed erythrocytes in fresh-frozen plasma for exchange transfusion. Obtaining a desired hematocrit.

Stored red blood cells may be automatically saline washed and resuspended in fresh-frozen plasma to yield a final product with any hematocrit that is desired. The technique provides for rapid processing and issue of blood and minimal risk of contamination of the unit. Red blood cells are more readily available than whole blood, and their use, with fresh-frozen plasma, in exchange transfusion, provides similar advantages, including low potassium content and normal content of procoagulants and bilirubin binding capacity. The method of reconstruction is based on calculations that use empirically determined estimates of average hematocrit and specific gravity of red blood cells and the volumetric flow characteristics of a programmable IBM 2991 Blood Processor. Only the weight of the stored red blood cell unit is required as a measurement at the time of preparing the resuspended cells. Quality-control studies of the final hematocrit indicates a 2.4 per cent standard deviation from a target value of 55 per cent.

Automation↗