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Biomedical subjects

L J Johnson

Publications and source records attributed to L J Johnson.

8 recordsLinked to original sources
PubMed1991

Effect of ammonium carbamate on nutritive and preservative characteristics of high-moisture coastal bermudagrass hay.

Two studies evaluated the effects of ammonium carbamate (AC) on preservation and digestibility of high-moisture (HM) Coastal bermudagrass (Cynodon dactylon) hay. A 3 X 7 factorial arrangement of treatments in a completely random design was used to estimate the efficacy of AC in laboratory conditions. Treatments were 25, 30, or 35% moisture (M) forage treated with levels (L) of 0, 1.14, 2.28, 3.42, 4.56, 5.70, or 6.84% AC. Nitrogen in forage increased (P less than .01) linearly due to M and L. There was a linear decrease (P less than .01) in ADF N due to M. Neutral detergent fiber decreased (P less than .01) linearly as M increased and increased (P less than .01) linearly with increased L. Acid detergent fiber decreased (P less than .01) linearly due to L. There was an M X L interaction (P less than .01) for hemicellulose (HC) concentrations and total aerobic fungal counts. The digestibility of HM hay treated with a product (ACNH) containing 57% AC was compared to that of untreated hay (UH) and UH plus urea (UHU) when fed to lambs (four lambs per treatment). Digestibility of NDF and hemicellulose (P less than .01) and ADF (P less than .05) was increased for ACNH forage compared with UH or UHU. Ammonium carbamate seems to be beneficial for preserving HM forage, and an admixture containing ammonium carbamate is effective for increasing the digestibility of Coastal bermudagrass hay.

Analysis of Variance↗
PubMed1990

Strategic management: a new dimension of the nurse executive's role.

The growth of corporate orientation for health care structures, with a focus on bottom-line management, has radically altered the role of nurse executives. With the organization's emphasis on performance, productivity, and results, successful nurse executives are now integrating the management of the delivery of nursing care with the management of complex corporate structures and relationships. The editor of Executive Development discusses the rapidly changing expectations and demands of the contemporary nurse executive's work. The nurse executive's role can be viewed from many perspectives: its scope, its value, its structure, its content. Content--"What does the nurse executive do that makes a real difference?"--is the focus here.

Administrative Personnel↗
PubMed1990

The influence of assumptions on effective decision-making.

In a competitive health care environment, the effectiveness of a nurse executive's decisions is enhanced by the use of a systemic set of assumptions. The author explains why this theory of decision-making is important, shows how three sets of assumptions manifest themselves in nursing administration practice, and presents a case study to show how nurse executives can use this theory to improve the effectiveness of their decisions.

Administrative Personnel↗
PubMed1989

Evaluation of vitamin K3 feed additive for prevention of sweet clover disease.

Sweet clover poisoning in cattle is caused by an anticoagulant (dicumarol) that is formed in moldy sweet clover hay. Previous experiments with vitamin K3 and vitamin K1 in therapy trials indicated that vitamin K1 was effective in reducing prothrombin times but vitamin K3 was not. As a possible alternative in the use of toxic sweet clover hays, vitamin K3 was evaluated to see if it would prevent hemorrhagic crises when fed to cattle consuming toxic sweet clover hay. Vitamin K3 levels of 0, 0.45, 4.5, 11, and 45 mg/kg body weight/day were fed to 173-235-kg steers consuming toxic (40-50 ppm dicumarol) sweet clover. The 45-mg K3/kg/day supplement was not palatable and had to be discontinued. The 0.45, 4.5, and 11-mg K3/kg/day supplements did not significantly reduce the prothrombin times as compared to the 0-mg K3/kg/day group.

Animals↗
PubMed1985

Vitamin K treatment of sweet clover poisoning in calves.

Dicumarol poisoning was reproduced by feeding naturally spoiled, sweet clover hay, which contained a minimum of 90 ppm dicumarol. Vitamin K1 administered IM was effective in treating the disease at dosages of 1.1, 2.2, and 3.3 mg/kg of body weight. Vitamin K3 treatment by various routes and dosages was ineffective.

Animals↗
PubMed1978

Effects from past solid waste disposal practices.

This paper reviews documented environmental effects experience from the disposal of solid waste materials in the U.S. Selected case histories are discussed that illustrate waste migration and its actual or potential effects on human or environmental health. Principal conclusions resulting from this review were: solid waste materials do migrate beyond the geometric confines of the initial placement location; environmental effects have been experienced from disposal of municipal, agricultural, and toxic chemical wastes; and utilization of presently known science and engineering principles in sitting and operating solid waste disposal facilities would make a significant improvement in the containment capability of shallow land disposal facilities.

Environmental Pollution↗
PubMedDate not supplied

Peer collaboration: accommodating students with mild learning and behavior problems.

This study examined the effectiveness of a structured problem-solving process, peer collaboration, as a means of assisting classroom teachers in developing and implementing alternative interventions for students with mild learning and behavior problems. The study included 48 elementary and junior high school teachers in the intervention group and 43 elementary school teachers in a comparison group. Results indicate that teachers in the intervention group increased their tolerance for the range of students' cognitive abilities. These teachers reconceptualized their understandings of classroom problems and successfully implemented interventions for 86% of the 70 problems they attempted to solve.

Behavior Therapy↗