Biomedical subjects

S M Hanson

Publications and source records attributed to S M Hanson.

14 recordsLinked to original sources

PubMed1995

Aedes albopictus (Diptera: Culicidae) eggs: field survivorship during northern Indiana winters.

Aedes albopictus (Skuse) is an Asian mosquito that recently has colonized North America via used tire transport. Temperate Ae. albopictus populations overwinter as diapausing eggs, but tropical populations cannot diapause. Eggs of tropical (SABAH) and temperate (INDY) Ae. albopictus were obtained in diapause-inducing conditions and placed inside a scrap tire to monitor overwintering survival in northern Indiana during the winters of 1989-1990 and 1990-1991. Diapause eggs of Ae. triseriatus (Say), a native North American mosquito, were included for comparison. Tropical Ae. albopictus from Malaysia did not survive either winter. Temperate Ae. albopictus from Indianapolis, IN, did not survive the winter of 1989-1990, but 78% survived the winter of 1990-1991. In contrast, 92 and 96% of Ae. triseriatus survived the winters of 1989-1990 and 1990-1991, respectively. Neither mean temperature nor absolute minimum temperature (a winter's lowest temperature) accurately predicted Ae. albopictus overwintering survivorship in the field. The possible effect of snow and other insulating materials on the overwintering survivorship of Ae. albopictus eggs is discussed.

Adaptation, Physiological↗

PubMed1995

Relationship between cold hardiness and supercooling point in Aedes albopictus eggs.

For many insects, low temperatures are not lethal unless their tissues freeze. To determine whether freezing is the cause of low temperature mortality of Aedes albopictus eggs, we measured their lower lethal temperature, the temperature that causes 50% mortality in a population, and supercooling point, the temperature at which the tissues freeze. Tropical and temperate Ae. albopictus eggs were tested under different diapause and cold acclimation conditions. Temperate Ae. albopictus eggs had a lower lethal temperature than tropical Ae. albopictus eggs. Diapause and cold acclimation decreased the lower lethal temperatures of temperate eggs. However, neither diapause, cold acclimation, nor geographic origin affected Ae. albopictus egg supercooling points. All lower lethal temperatures were above -13 degrees C and all supercooling points were below -26 degrees C, indicating prefreeze mortality. Eggs of Aedes triseriatus and Aedes aegypti also died before they froze.

Acclimatization↗

PubMed1992

Family nursing curricula in U.S. schools of nursing.

Care of individual clients has been the traditional focus of health care and therefore nursing education. Recently, the family as a unit of care has received more attention. This study provides a current and accurate description of family nursing content, summarizing the major concepts, definitions, course titles, textbooks, and assessment instruments used in teaching family nursing in baccalaureate and graduate programs. The findings identify trends in family nursing education that will provide direction to educators and clinicians planning to strengthen family nursing in their curricula.

Curriculum↗

PubMed1988

Urban distribution of Aedes triseriatus in northern Indiana.

Ovitraps were used to determine the distribution of Aedes triseriatus among forty-eight 1.2 km2 quadrants in urban South Bend and Mishawaka, Indiana. Oviposition paddles from 96 ovitraps were collected for 13 weeks from June to September, 1986. A total of 82,974 eggs was collected. Eggs were present in each quadrant at least once and were found in most quadrants on 6 or more collection dates. Ninety-two percent of the ovitraps were positive at least once, indicating ubiquitous distribution throughout the urban area. The eggs collected were 80-90% Ae. triseriatus, the remainder being Ae. Hendersoni. Effectiveness of large (3,100 ml) and small (350 ml) ovitraps was compared. The large ovitraps exceeded the small by 319% for eggs/positive ovitrap and 486% in numbers of positive ovitraps.

Aedes↗

PubMed1988

Write on.

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Writing↗

PubMed1986

The changing nature of fatherhood: the nurse and social policy.

Fathers, fathering and fatherhood are topics which receive little attention throughout the world's professional literature. Only recently has there been increased interest and research on the changing roles of men with particular emphasis on nurturing and parenting. A body of knowledge has started to accumulate which investigates the role of fathers with their families. The purpose of this article is to summarize the research literature about fatherhood in the United States of America today and to discuss the implications of this research for the practice of nursing. This analysis synthesizes the literature using two different perspectives. The developmental perspective traces the role of fathers from family planning through the family life cycle to grandfatherhood. The social contextual perspective summarizes the literature related to fathers for three common variations in society today: single custodial fathers, fathers in dual earner families, and adolescent fathers. Lastly, implications for nursing practice and social policy are discussed.

Family↗

PubMed1982

Third report of the ASCP/CAP/APC joint task force on pathology manpower.

This report concerns the results of pathology manpower surveys encompassing responses from four groups of pathologists: (1) solo and group practitioners; (2) training program directors; (3) house staff; (4) diplomates seeking positions. The rate of response by all four groups is judged highly satisfactory. The results show an approximate balance between supply and demand with respect to manpower in pathology. Comparison with the results of two similar surveys conducted by the Joint Task Force shows the following trends: (1) a continued marked reduction of foreign medical graduate (FMG) trainees; (2) continued increase in the proportion of women entering pathology; (3) an increase in the size of the average practice and a corresponding decrease in the proportion of pathologists in solo practice; (4) a decreased tendency of practicing pathologists to relocate; (5) an increase in pathologists lost to the profession because of death, disability and retirement; (6) a slight decrease (approximately 50) in the number of funded full-time positions and a slight increase in the number of part-time vacancies.

Aged↗

PubMed1978

Scar carcinoma of the lung.

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Adult↗

PubMed1977

Familial occurrence of colon and uterine carcinoma and of lymphoproliferative malignancies: clinical description.

Carcinoma of the colon occurred in four generations of a family, including two of three siblings of one generation and eight of 19 members of the next generation. In addition, uterine cancer or lymphoproliferative malignancies were found in two family members. Of 41 members of the fourth generation, two were found to have colon cancer and one had malignant lymphoma. Clinical features were similar to those patients with "cancer family syndrome." Although a precise genetic mechanism is uncertain, it appeared to be transmitted as an autosomal dominant character.

Adenocarcinoma↗

PubMed1975