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Biomedical subjects

E M Powers

Publications and source records attributed to E M Powers.

11 recordsLinked to original sources
PubMed2001

Health and service utilization patterns among homeless men in transition: exploring the need for on-site, shelter-based nursing care.

Between September 1999 and May 2000, as part of a larger faculty/student teaching project, data describing the demographic, health problem and service utilization patterns of 183 newly sheltered homeless men (mean age = 42) seeking on-site nursing clinic services were collected and analyzed. Upon arrival to the transitional shelter, 46% of the study participants were medically uninsured or received state subsidized health benefits (49%). Almost all (99%) were in recovery from substance addiction. Despite numerous self-reported health problems, 44% had no primary care provider and 35% were seen only sporadically in local hospital clinics or in emergency departments. During the study period, nurse practitioner students and faculty managed most of the residents' episodic illnesses on-site, while assisting them to secure insurance coverage and medical appointments as a prelude to independent living. This was an attempt to curtail residents' previous pattern of waiting until medical problems became serious before seeking treatment. These findings mirrored those in studies of similar populations equating on-site delivery of health care to cost reduction. Unfortunately, many nurse-managed clinics, like our study site, fail to generate data supporting nurses' clinical efficiency and cost effectiveness in caring for homeless individuals. As such, nurses' work remains invisible and underappreciated. This article argues that future studies examining nurses' work and worth in caring for homeless individuals are necessary in determining future health care service planning with this vulnerable population.

Adult↗
PubMed1995

Efficacy of the Ryu nonstaining KOH technique for rapidly determining gram reactions of food-borne and waterborne bacteria and yeasts.

A simple and rapid (< 60 s) nonstaining technique with 3% potassium hydroxide to determine Gram reactions was tested with 495 food-borne and waterborne bacteria and yeasts. In KOH, suspensions of gram-negative bacteria become viscous and string out. Gram-positive bacteria are not affected. There was 100% correlation between the KOH string test results and gram-positive and gram-negative strains.

Animals↗
PubMed1994

Biocidal efficacy of a flocculating emergency water purification tablet.

Chlor-Floc (CF) emergency water purification tablets were tested for bactericidal, virucidal, and cysticidal efficacy in water at temperatures ranging from 5 to 25 degrees C. The minimal required log reduction was achieved for bacteria, Giardia muris, and rotavirus, but CF did not achieve the required log reduction of poliovirus at any of the temperatures or times investigated. The biocidal properties of the CF tablet were equivalent to if not greater than those of the Globaline iodine tablet, and the CF tablet was a more rapid cysticide under several potential use conditions. Therefore, it is a suitable substitute for iodine tablets for emergency purification of drinking water. Clarification of turbid waters was effective, but filtration through a cloth is necessary to prevent flocculated sediment from entering the canteen. The CF tablets met military requirements for emergency water purification and are safe and acceptable for use by the military.

Journal Article↗
PubMed1977

Simplified 48-hour IMVic test: an agar plate method.

An agar plate method was developed for the performance of the IMVic (indole, methyl red, Voges-Proskauer, and citrate) tests in lieu of the conventional tubed liquid media. By modifying the composition of the media and adding agar, a single "X"-compartmented petri dish was prepared containing all four IMVic test media. Ease of performance and simplification of the test were achieved by inoculating all four media simultaneously from a single colony (single inoculum) on eosin-methylene blue agar. Tests with 87 cultures, representing 7 genera in the family Enterobacteriaceae, were completed with typical (correct) IMVic patterns for all cultures within 48 h. Parallel tests with conventional media showed that the agar plate method was superior, more sensitive, faster, and simpler to perform, and less time was required to identify Escherichia coli by 72 h.

Bacteriological Techniques↗
PubMed1973

Microbiological testing of Skylab foods.

The Skylab manned space flight program presented unique food microbiology problems. This challenge was successfully met by careful evaluation of the total Skylab food system by considering the nature of Skylab foods, their processing and handling, and Skylab food safety requirements. Some of the unique problems encountered with the Skylab foods involved: extended storage times, variations in storage temperatures, no opportunity to resupply or charge foods after launch of the Skylab Workshop, first use of frozen foods in space, first use of a food-warming device in weightlessness, relatively small size of production lots requiring statistically valid sampling plans, and use of the food as an accurately controlled segment of sophisticated life science experiments. Consideration of all of these situations generated the need for definitive microbiological tests and test limits. These tests are described in this paper along with the rationale for their selection. Test results are reported which show successful compliance with the test limits.

Aerobiosis↗
PubMed1971

Bacteriology of dehydrated space foods.

The initial bacteriological requirement established in 1964 for space foods by the U.S. Army Natick Laboratories are: a total aerobic plate count (</= 10,000 per g), a total coliform count (</= 10 per g), fecal coliforms (negative per gram), fecal streptococci (</= 20 per g), coagulase-positive staphylococci (negative in 5 g) and salmonellae (negative in 10 g). Of the space foods and prototypes tested during 1968 and 1969, 93% complied with the total aerobic plate count, 98% had less than 1 coliform per g, and 99% were negative for fecal coliforms; 88% complied with the streptococci requirement; 100 and 98% were negative for staphylococci and salmonellae, respectively. Nineteen food samples which did not comply (as indicated parenthetically by actual counts per gram) with the requirements were (i) total aerobic plate count: beef soup and gravy base (18,000), chicken soup and gravy base (57,000), spaghetti with meat sauce (12,100 and 14,000), sugared coffee (> 300,000), chocolate ice cream cubes (20,000), and each of four samples of chocolate candy (12,000 to 61,000); (ii) coliforms: two out of three vanilla milk drinks (16 and 127) and one beef hash bar (14); (iii) fecal coliforms: one sample of chicken soup and gravy base positive; (iv) fecal streptococci: two samples of peanut cubes (40 and 108), coconut cubes (75), chicken soup and gravy base (2,650), beef soup and gravy base (33), and five out of six flavored milk drinks (23 to 300); (v) salmonellae: one each of chicken and beef soup and gravy base were positive.

Aerobiosis↗
PubMed1967

Microbiological burden on the surfaces of Explorer 33 spacecraft.

The Explorer XXXIII Spacecraft (Anchored Interplanetary Monitoring Platform, or AIMP) was decontaminated to prevent gross contamination of the moon with terrestrial microorganisms. Assay of the total spacecraft surface before and after decontamination showed that the decontamination procedure reduced the viable microbiological burden from 1.40 x 10(6) to 3.60 x 10(4). However, assembly of parts which were not decontaminated for engineering reasons or were not assembled under cleanroom conditions increased the viable microbial burden at the time of launch to 2.62 x 10(5).

Humans↗
PubMedDate not supplied

An innovation in testing.

The testing method presented here is just one of a variety of "games" that are being utilized in teaching at all levels. It helps to make testing fun, capitalizes on the student's natural tendency to fool around, and teaches something in the process.

Educational Measurement↗
PubMedDate not supplied

Uncovering the knowledge embedded in clinical nurse manager practice.

To redesign effective nurse manager roles, data-based descriptions of their skilled performance and developmental learning are essential. This article is the first report of an interpretive, phenomenologic study to identify the skills and expertise embedded in the practice of nurse managers. The data describe how nurse managers operationalize institution values for patient care, and conversely, the impact of organization values on nurse managers' everyday behavior.

Adult↗