Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Life Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 39781 - 39810 of 44687

Full-Text Articles in Entire DC Network

In Vitro Methodologies To Assess The Effect Of Processing Of Rice On Protein Quality, Jeanne Ejigui Bitondo Dec 1992

In Vitro Methodologies To Assess The Effect Of Processing Of Rice On Protein Quality, Jeanne Ejigui Bitondo

All Theses

No abstract provided.


Effects Of Dietary Calcium And Fasting On Osteoclast Recession And Recruitment In Calcium Deficient Rats, Kenneth R. Wright Dec 1992

Effects Of Dietary Calcium And Fasting On Osteoclast Recession And Recruitment In Calcium Deficient Rats, Kenneth R. Wright

Loma Linda University Electronic Theses, Dissertations & Projects

The osteoclast, a multinucleated giant cell, has as its role the resorption of bone matrix with consequent release of calcium. The osteoclast is thought to derive from a pluripotent stem cell which also gives rise to monocytes and macrophages. The development, activation, and inhibition of osteoclasts are influenced by a number of systemic and local factors. The release of these factors is influenced by changes in the dietary status of the animal. Calcium deficiency is known to stimulate the recruitment and activity of large numbers of osteoclasts. These osteoclasts can subsequently be inhibited by increasing dietary calcium intake. Disappearance of …


Comparison Of The Phosphate Requirements Of Burr Medic And Yellow Serradella With Subterranean Clover In The Low Rainfall Wheatbelt Of Western Australia, Blakely Paynter Dec 1992

Comparison Of The Phosphate Requirements Of Burr Medic And Yellow Serradella With Subterranean Clover In The Low Rainfall Wheatbelt Of Western Australia, Blakely Paynter

Grain and Other Field Crops Research Articles

Burr medic (Medicago polymorpha) and yellow serradella (Ornithopus compressus) were compared with subterranean clover (Trifolium subterraneum) in their response to freshly topdressed phosphate in the low rainfall wheatbelt of Western Australia. Species were compared on the amount of applied phosphorus (P) required for 90% maximum yield and the ratio of their curvature coefficients from the Mitscherlich relationship between P applied and absolute yield. On marginally acidic, medium-textured soils, burr medic had a higher external shoot requirement for applied P than subterranean clover. Relative differences between the species were affected by season, initial concentration of bicarbonate-extractable P in the soil (0-10 …


Retinol Deficiency And Urinary Stone Disease: Clinical Evidence Is Missing, P. P. Singh, R. Kiran Nov 1992

Retinol Deficiency And Urinary Stone Disease: Clinical Evidence Is Missing, P. P. Singh, R. Kiran

Scanning Microscopy

Serum retinal levels were studied in : (a) 95, 56 and 43 normal subjects belonging to lower, middle and upper socio-economic groups respectively, (b) 35 adult males suffering from night blindness, (c) 27 subjects with low retinal levels, (d) 8 retinal deficient subjects (e) 17 male infants suffering from overt retinal deficiency, (f) 43 radiologically confirmed stone patients and (g) age and sex matched controls (infants 20; adults 120). The subjects included in groups b to f were clinically and radiologically examined for stone disease. Some inhibitors and promoters of stone disease were estimated in urine in groups b to …


Remote Detection Of Coral 'Bleaching' Using Pulsed-Laser Fluorescence Spectroscopy, J. T. Hardy, F. E. Hoge, J. K. Yungel, Richard E. Dodge Nov 1992

Remote Detection Of Coral 'Bleaching' Using Pulsed-Laser Fluorescence Spectroscopy, J. T. Hardy, F. E. Hoge, J. K. Yungel, Richard E. Dodge

Marine & Environmental Sciences Faculty Articles

Despite their biological and economic importance coral reefs are increasingly threatened by human activities. Recently, 'bleaching' of reefs, i.e. loss of photosynthetic pigmentation, has occurred at numerous globally-distributed sites. A number of environmental stressors, including increased water temperature, can induce bleaching. Several investigators have suggested that the widespread occurrence of coral bleaching represents an early warning signal of global greenhouse warming. Regardless of the cause, the extent of coral bleaching, both regionally and globally, needs to be documented and monitored. We conducted laboratory studies to evaluate the potential of using remotely-sensed laser-induced fluorescence to monitor coral pigmentation. Five species of …


Long Term Mobidity And Mortality Of Adolescent Obesity: A Follow-Up Of Third Harvard Growth Study Participants Of 1922 To 1935, Aviva Must Ph.D., Paul F. Jacques Sc.D., Gerard E. Dallal Ph.D., Carl J. Bajema Ph.D., William H. Dietz M.D., Ph.D Nov 1992

Long Term Mobidity And Mortality Of Adolescent Obesity: A Follow-Up Of Third Harvard Growth Study Participants Of 1922 To 1935, Aviva Must Ph.D., Paul F. Jacques Sc.D., Gerard E. Dallal Ph.D., Carl J. Bajema Ph.D., William H. Dietz M.D., Ph.D

Peer Reviewed Publications

Background. Overweight in adults is associated with increased morbidity and mortality. In contrast, the long-term effect of overweight in adolescence on morbidity and mortality is not known.

Methods. We studied the relation between overweight and morbidity and mortality in 508 lean or overweight adolescents 13 to 18 years old who participated in the Harvard Growth Study of 1922 to 1935. Overweight adolescents were defined as those with a body-mass index that on two occasions was greater than the 75th percentile in subjects of the same age and sex in a large national survey. Lean adolescents were defined as those with …


Nebline, November 1992 Nov 1992

Nebline, November 1992

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Ag Update: Agricultural News & Events

Home Extension News

On-the-Grow: Horticulture News & Recommendations

The Cloverline: 4-H News and Events

Expanded Food and Nutrition Education Program (EFNEP) News

Extension Calendar

and other extension news


Wpa News 38 (1992), World Pheasant Association Nov 1992

Wpa News 38 (1992), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (November 1992), number 38

Published by the World Pheasant Association


Evaluation And Management Of Dietary Habits In Japanese Renal Stone Formers, Haruo Ito, Tadashi Kotake, Naoto Miura Oct 1992

Evaluation And Management Of Dietary Habits In Japanese Renal Stone Formers, Haruo Ito, Tadashi Kotake, Naoto Miura

Scanning Microscopy

To elucidate the relationship between the formation of kidney stones and diet, we carried out a dietary investigation in patients with urinary tract stones. Dietary intakes were estimated for 36 patients (24 men, 12 women) with calcium stones, and compared with the official dietary requirements for the Japanese.

Total protein intake, animal protein intake and animal protein ratio were significantly higher for patients with stones in both men and women. Dietary salt intake was significantly higher for male patients and the total group. Dietary calcium and carbohydrate intakes were significantly lower for patients with stones in men and the total …


Scanning Electron Microscope Observations Of Brine Shrimp Larvae From Space Shuttle Experiments, Lynnette Debell, Avelina Paulsen, Brian Spooner Oct 1992

Scanning Electron Microscope Observations Of Brine Shrimp Larvae From Space Shuttle Experiments, Lynnette Debell, Avelina Paulsen, Brian Spooner

Scanning Microscopy

Brine shrimp are encysted as gastrula stage embryos, and may remain dehydrated and encysted for years without compromising their viability. This aspect of brine shrimp biology is desirable for studying development of animals during space shuttle flight, as cysts placed aboard a spacecraft may be rehydrated at the convenience of an astronaut, guaranteeing that subsequent brine shrimp development occurs only on orbit and not on the pad during launch delays.

Brine shrimp cysts placed in 5 ml syringes were rehydrated with salt water and hatched during a 9 day space shuttle mission. Subsequent larvae developed to the 8th larval stage …


Rate Maintenance Of Cell Division In Escherichia Coli B/R: Analysis Of A Simple Nutritional Shift-Down, Arieh Zaritsky, Charles E. Helmstetter Oct 1992

Rate Maintenance Of Cell Division In Escherichia Coli B/R: Analysis Of A Simple Nutritional Shift-Down, Arieh Zaritsky, Charles E. Helmstetter

Biomedical Engineering and Sciences Faculty Publications

A competitive (nonmetabolizable) inhibitor of glucose uptake, α- methylglucoside, was used to limit the growth of Escherichia coli. Cell division during such a nutritional shift-down was studied in batch cultures and with the 'baby-machine' technique. Following a brief delay, the rate of division was maintained for 60 to 70 min in batch cultures and for an extended period in the baby machine. Decreases in cell size were due, in part, to a possible reduction in the mass per chromosome origin at the time of replication initiation and a shorter time interval between initiation and the subsequent division. These unusual findings …


South Dakota Farm And Home Research (Fall 1992), South Dakota State University Oct 1992

South Dakota Farm And Home Research (Fall 1992), South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

This issue contains the 105th South Dakota Agricultural Experiment Station Annual Report. This report covers July 1, 1991 - June 30, 1992.

Director's Comments: Bright spots in 'the year of biostress' [p] 1
Plant stress research puts 'answers' in your fields [p] 2
Horticultural research seeks to widen your choices [p] 4
Animal stress research tied to 'making a living' [p] 5
Human stress research seeks to improve 'quality of life' [p] 8
105th Annual Report: July 1, 1991, to June 30, 1992




Nebline, October 1992 Oct 1992

Nebline, October 1992

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Ag Update: Agricultural News & Events

Home Extension News

On-the-Grow: Horticulture News & Recommendations

The Cloverline: 4-H News and Events

Expanded Food and Nutrition Education Program (EFNEP) News

Extension Calendar

and other extension news

Weed Awareness


Changes In Intracellular Chloride During Osmotic Stress And L-Alanine Uptake In Mouse Hepatocytes, Kening Wang Oct 1992

Changes In Intracellular Chloride During Osmotic Stress And L-Alanine Uptake In Mouse Hepatocytes, Kening Wang

Electronic Theses and Dissertations

A stable intracellular ionic environment is necessary for hepatocytes to function normally. Thus, during hypotonic shock or L-alanine uptake, hepatocytes swell and then exhibit a regulatory volume decrease (RVD), which comprises an increase in K$\sp+$ conductance (G$\sb{\rm K}$), an increased K$\sp+$ efflux, and a hyperpolarization of transmembrane potential (V$\sb{\rm m}$). Since hepatocyte intracellular Cl$\sp-$ has been demonstrated to distribute passively with V$\sb{\rm m}$, this study is designed to test the hypothesis that the hypotonic shock- or L-alanine uptake-induced hyperpolarization of V$\sb{\rm m}$ might provide an electromotive force for the efflux of hepatocyte intracellular Cl$\sp-$, which in turn would contribute osmotically …


The Effects Of Post-Event Massage Therapy On Multistage Ultraendurance Cycling, Tracey Hodges Drews Oct 1992

The Effects Of Post-Event Massage Therapy On Multistage Ultraendurance Cycling, Tracey Hodges Drews

Human Movement Studies & Special Education Theses & Dissertations

Post-event massage therapy has been proposed to hasten muscle recovery and improve ensuing performance in multistage ultraendurance cycling events. Six elite male cyclists competed in two 4·d stage races of 161 kmd·1 on a computerized race simulator over challenging terrain in a controlled laboratory environment with an average completion time of 275 ± 28 min. In a crossover experimental design, subjects received either 30 min post-event massage therapy or a 30 min inactivated diathermy treatment serving as a blind placebo after each 161 km race. The subjects repeated the 4·d, 161 km·d·1 event 18d later receiving alternate post-event …


The Effect Of Varying Environmental Conditions On Phytolith Morphometries In Two Species Of Grass (Bouteloua Curtipendula And Panicum Virgatum), T. B. Ball, J. D. Brotherson Sep 1992

The Effect Of Varying Environmental Conditions On Phytolith Morphometries In Two Species Of Grass (Bouteloua Curtipendula And Panicum Virgatum), T. B. Ball, J. D. Brotherson

Scanning Microscopy

Solid deposits of SiO2 (phytoliths) accumulate in many plants in specific intracellular and extracellular locations. Phytoliths have morphological characteristics unique to some taxa and therefore have taxonomic significance. Phytoliths persist and maintain their morphological integrity long after a plant has died, thus becoming a microfossil of the plant that produced them. Development of phytolith sytematics for microfossil phytoliths has traditionally followed a typological approach based on simple verbal descriptions of shape. A new method for use in phytolith sytematics is the morphometric approach which employs computer-based Image Analysis Systems to make quantified measurements of morphological parameters (size, shape, texture, …


Selection And Development Of Replacement Beef Heifers, Norris J. Stenquist, James A. Bennett Sep 1992

Selection And Development Of Replacement Beef Heifers, Norris J. Stenquist, James A. Bennett

Archived Agriculture Publications

Selection, development, management, and nutrition of heifer calves to be used as herd replacements are key factors in maintaining beef herd productivity. A cow/calf producer, to be successful, must have some goals or criterion for heifer selection and development. For practically all Utah cattle production areas, economics dictate that heifers must calve as two-year-olds. Heifers must be properly developed and managed to permit this. The following factors are important: Heifers should 1) become pregnant in the first 25 days of the breeding season, 2) give birth to a live calf with little or no calving difficulty, 3) raise a calf …


Nebline, September 1992 Sep 1992

Nebline, September 1992

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Ag Update: Agricultural News & Events

Home Extension News

On-the-Grow: Horticulture News & Recommendations

The Cloverline: 4-H News and Events

Expanded Food and Nutrition Education Program (EFNEP) News

Extension Calendar

and other extension news


Agricultural Experiment Station News September 1992 Sep 1992

Agricultural Experiment Station News September 1992

Agricultural Research Division: News and Annual Reports

CONTENTS:
COMMENTS FROM THE DEAN
RECOVERY OF INDIRECT COSTS ON RESEARCH GRANTS
FY 1993 CSRS BUDGET
NSF RESEARCH RANKINGS FOR UNL - FY 1990
COMPARISON OF NC REGIONAL AES PROGRAMS
RETURNS ON INVESTMENT FOR AG RESEARCH
FACTS ABOUT THE U.S. AND JAPAN'S FOOD AND AGRICULTURE INDUSTRIES
REPORT ON THE NATIONAL RESEARCH INITIATIVE FOR FISCAL YEAR 1991
RECOGNITION OF JUNIOR FACULTY FOR EXCELLENCE IN RESEARCH
ARMY CORPS OF ENGINEERS INVESTIGATION AT THE ARDC
GRANT PROPOSALS - ACE & LISA
NEW OR REVISED PROJECTS
GRANTS AND CONTRACTS RECEIVED AUGUST & SEPTEMBER, 1992
PROPOSALS SUBMITTED FOR FEDERAL GRANTS


The Mayfly Newsletter, Peter M. Grant Sep 1992

The Mayfly Newsletter, Peter M. Grant

The Mayfly Newsletter

The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.


Rice Insects: The Role Of Host Plant Resistance In Integrated Management Systems, E. A. Heinrichs Sep 1992

Rice Insects: The Role Of Host Plant Resistance In Integrated Management Systems, E. A. Heinrichs

Department of Entomology: Faculty Publications

Insects are among the most important abiotic and biotic constraints to rice production. National rice research programs are in various stages in the development and implementation of integrated pest management (IPM) stratagies for rice insect control. Among the various control tactics, insect resistant cultivars are sought as the major tactic in rice IPM. Through the activities of interdisciplinary teams of scientists significant progress has been made in the development and release of insect resistant cultivars to farmers. Because of its compatibility with other control tactics insect resistance has proven to fit well into the IPM approach to rice insect control …


Development Of A Semi-Synthetic Medium Supporting Adherent Growth In Coagulase-Negative Staphylococci, Abbas Sadeghi Aug 1992

Development Of A Semi-Synthetic Medium Supporting Adherent Growth In Coagulase-Negative Staphylococci, Abbas Sadeghi

Dissertations and Theses

A semi-synthetic medium for use in determining adherent growth with Staphylococcus epidermidis and Staphylococcus saprophyticus was developed. Production of an adherent biofilm was dependent upon the presence of hematin in the growth medium. Clinical strains of Staphylococcus epidermidis were tested for production of an adherent biofilm in trypticase soy broth, the semi-synthetic medium and the hyperalimentary nutrient solution used in the neonatal hospital unit. An adherent biofilm was obtained when Staphylococcus epidermidis was cultured m hematin supplemented hyperalimentary solution. Growth in the hyperalimentary nutrient solution diluted with fetal calf serum showed the same growth rate as when the nutrient solution …


Interaction Of Nutrition And Infection: Effect Of Copper Deficiency On Resistance To Trypanosoma Lewisi, A. Crocker, Clarence Lee, Georgiana Aboko-Cole, C. Durham Aug 1992

Interaction Of Nutrition And Infection: Effect Of Copper Deficiency On Resistance To Trypanosoma Lewisi, A. Crocker, Clarence Lee, Georgiana Aboko-Cole, C. Durham

Department of Biology Faculty Publications

The copper-deficient rat-trypanosome system was used to study copper deficiency in Sprague Dawley rats infected with Trypanosoma lewisi. Throughout the observational period, animals on the deficient diet had lower plasma and liver copper concentrations compared with complete and pair-fed animals. In all dietary groups, the food intake and body weight changes of rats inoculated with T lewisi showed significant increases over the noninoculated controls. The rate of these indices were significantly less in the copper-deficient animals compared with the animals fed complete diets. Copper-deficient and pair-fed control rats showed greater numbers of parasites than controls throughout the infection. The duration …


Ard News August 1992 Aug 1992

Ard News August 1992

Agricultural Research Division: News and Annual Reports

CONTENTS:

COMMENTS FROM THE DEAN
FY1993 CSRS BUDGET OUTLOOK
UNIVERSITY OF NEBRASKA HARDIN DISTINGUISHED GRADUATE FELLOWSHIP FOR 1992-1993
ARD ADVISORY COUNCIL ELECTION RESULTS
WIDAMAN TRUST DISTINGUISHED GRADUATE ASSISTANT AWARD
SUSTAINABLE AGRICULTURE GRANTS AVAILABLE
GRANTS AND CONTRACTS RECEIVED JUNE & JULY, 1992
NEW OR REVISED PROJECTS
PROPOSALS SUBMITTED FOR FEDERAL GRANTS


Worm Control In Sheep In Western Australia. Crack Down On Worms: An Information Guide For Advisers, Consultants, Livestock Personnel And Farmers, Department Of Agriculture, Western Australia Aug 1992

Worm Control In Sheep In Western Australia. Crack Down On Worms: An Information Guide For Advisers, Consultants, Livestock Personnel And Farmers, Department Of Agriculture, Western Australia

Animal production and livestock published reports

In Western Australia’s winter rainfall areas, the control of gastro-intestinal sheep worms is based on the strategic timing of drenches.

Sheep are drenched at a time that reduces the contamination of pastures with worm eggs and larvae in late summer and autumn. The timing of the drenches is particularly important for the control ofbrown stomach worms (Ostertagia species) and black scour worms (Trichostrongylus species)

Drenches given in late spring, when pasture is starting to dry off, and again in summer, successfully reduce pasture contamination in mid summer and autumn. A faecal egg count will determine the need and timing of …


Nebline, August 1992 Aug 1992

Nebline, August 1992

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Ag Update: Agricultural News & Events

Home Extension News

On-the-Grow: Horticulture News & Recommendations

The Cloverline: 4-H News and Events

Extension Calendar

and other extension news

County Fair Special Edition


Lipoxygenase Inhibitors Shift The Yeast/Mycelium Dimorphism In Ceratocystis Ulmi, Ellen C. Jensen, Clyde Ogg, Kenneth W. Nickerson Aug 1992

Lipoxygenase Inhibitors Shift The Yeast/Mycelium Dimorphism In Ceratocystis Ulmi, Ellen C. Jensen, Clyde Ogg, Kenneth W. Nickerson

Papers in Microbiology

The yeast-mycelium dimorphism in Ceratocystis ulmi, the causative agent of Dutch elm disease, was switched by gossypol, nordihydroguaiaretic acid, and propylgallate. In each case the mycelial form was converted to the yeast form. These compounds are recognized lipoxygenase inhibitors. Inhibitors of cyclooxygenase and thromboxane synthetase did not cause mycelia to shift to the yeast form. We suggest the following two-part hypothesis: (i) that lipoxygenase is a target for antifungal antibiotics and (ii) that many phytoalexins (antimicrobial compounds of plant origin) are targeted toward fungal lipoxygenases. In addition, in a study to determine potential lipoxygenase substrates, a fatty acid analysis …


Isolation And Characterization Of The Triiodothyronine Regulatory Region Of The Fatty Acid Synthase Gene In Avian Species, Delfina Rivera Valencia Aug 1992

Isolation And Characterization Of The Triiodothyronine Regulatory Region Of The Fatty Acid Synthase Gene In Avian Species, Delfina Rivera Valencia

Masters Theses

Fatty acids are utilized for energy storage in the form of triglycerides or neutral fats. One way to regulate fatty acid biosynthesis is to regulate the activity of fatty acid synthase (FAS), the enzyme that catalyzes the reaction. Previous studies have shown that regulation of FAS activity and synthesis is regulated by the hormone triiodothyronine, T3, at the level of transcription. Thus, isolation and characterization of the promoter region o f the FAS gene will enable the identification of the thyroid hormone response elements (TREs). This study could shed light on the mechanisms on how this gene can …


Temporal And Spatial Dietary Variability In The Prehistoric Lower And Middle Osmore Drainage: The Carbon And Nitrogen Isotope Evidence, Karin L. Sandness Aug 1992

Temporal And Spatial Dietary Variability In The Prehistoric Lower And Middle Osmore Drainage: The Carbon And Nitrogen Isotope Evidence, Karin L. Sandness

Department of Anthropology: Theses and Student Research

Skeletal material from six sites representing human occupation in the Osmore drainage of southern Peru, circa A.D. 50 to 1400, was analyzed for carbon and nitrogen isotopes. The δ13C and δ15N values observed in the study indicate-spatial and temporal variability in diet. Specimens from the lower valley are, in general, more positive in both carbon and nitrogen than those of the middle valley, with the most positive values being present in specimens from the coastal Chiribaya site, San Geronimo. The data suggest, however, that all populations in the drainage experienced shifts in diet through time. Samples …


Utilizing Iron In Turfgrass Management, David J. Wehner Jul 1992

Utilizing Iron In Turfgrass Management, David J. Wehner

Office of the Dean (CAFES) Scholarship

The purpose of this article is to review some of the basic information on iron, look at one of the discoveries made during the 1980s, and present some of the published research studies that have been conducted with iron on turfgrasses. Additional information on the use of iron can be found in popular magazines and in the proceedings of turfgrass conferences.