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

Digital Commons Network™

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

2007

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 10411 - 10440 of 12223

Full-Text Articles in Entire DC Network

Effects Of Aversive Conditioning On Behavior Of Nuisance Louisiana Black Bears, Jennifer Leigh Jan 2007

Effects Of Aversive Conditioning On Behavior Of Nuisance Louisiana Black Bears, Jennifer Leigh

LSU Master's Theses

Consistent habitat loss and fragmentation are contributing factors to the rise of human-bear conflicts in south Louisiana. Complaints associated with nuisance activities of Louisiana black bears (Ursus americanus luteolus) experienced in this region have steadily increased since 2000, requiring intervention by state and federal agencies. As a threatened species, Louisiana black bears require non-lethal management referred to as aversive conditioning. We used rubber buckshot and dogs to test the effectiveness of management techniques used by the state to deter nuisance activity by black bears. Eleven bears, representing approximately 15% of the estimated population in this region, were captured in residential …

Go to article

Isolation And Characterization Of The Siamese Family: A Novel Class Of Cell Cycle Regulators In Plants, Michelle Lynn Churchman Jan 2007

Isolation And Characterization Of The Siamese Family: A Novel Class Of Cell Cycle Regulators In Plants, Michelle Lynn Churchman

LSU Doctoral Dissertations

Recessive mutations in the SIAMESE (SIM) gene of Arabidopsis result in multicellular trichomes harboring individual nuclei with a low ploidy level, a phenotype strikingly different from that of wild-type trichomes, which are single cells with a nuclear DNA content of approximately 16-32C. These observations suggested that SIM is required to suppress mitosis as part of the switch to endoreplication in trichomes. We demonstrate that SIM encodes a novel 14kD protein that is part of a small Arabidopsis gene family comprised of four members. Homologs exist in other dicots and in monocots, although no obvious animal homologs have been identified. SIM …

Go to article

Culture-Independent Identification Of Gut Bacteria In Fourth-Instar Red Imported Fire Ant, Solenopsis Invicta Buren, Larvae, Albert Hon-Yu Lee Jan 2007

Culture-Independent Identification Of Gut Bacteria In Fourth-Instar Red Imported Fire Ant, Solenopsis Invicta Buren, Larvae, Albert Hon-Yu Lee

LSU Doctoral Dissertations

Red imported fire ants (RIFA), Solenopsis invicta Buren, are medical, urban, and agricultural pests from South America. Fourth-instar larvae are used by the colony to digest solid food and then regurgitate it for consumption by workers and queens. Larvae are an ideal source of investigations of obligate endosymbiotic bacteria possibly involved in nutrient distributions. I attempted to first identify what bacteria species are in the guts of larvae followed by antibiotic and microscopy work to further study their roles in the ants. The composition of the bacterial community in fire ant larvae was described with culture-independent methods utilizing 16S rDNA …

Go to article

Population Ecology Of Pseudacteon Tricuspis Borgmeier (Diptera: Phoridae), An Introduced Parasitoid Of The Red Imported Fire Ant Solenopsis Invicta Buren (Hymenoptera: Formicidae) In Louisiana, Donald Charles Henne Jan 2007

Population Ecology Of Pseudacteon Tricuspis Borgmeier (Diptera: Phoridae), An Introduced Parasitoid Of The Red Imported Fire Ant Solenopsis Invicta Buren (Hymenoptera: Formicidae) In Louisiana, Donald Charles Henne

LSU Doctoral Dissertations

Aspects of the population ecology of a parasitoid (Pseudacteon tricuspis) of the red imported fire ant (Solenopsis invicta) in Louisiana were studied. The spatio-temporal abundance patterns, dispersal, population spread, aggregation, direct mutual interference and functional response characteristics of this parasitoid were studied to address deficiencies in our knowledge about phorid flies, particularly Pseudacteon parasitoids. This endoparasitoid was discovered to manipulate host ant behavior in ways that benefit its own survival. Laboratory experiments to gain insights into behavioral and functional responses revealed that fly aggregations were density-dependent and interference was not significant when 1-3 females were simultaneously confined with hosts, although …

Go to article

Juvenile Crawfish (Procambarus Clarkii) Lc50 Mortality From South Louisiana Crude, Peanut And Mineral Oil, Okey Umejuru Jan 2007

Juvenile Crawfish (Procambarus Clarkii) Lc50 Mortality From South Louisiana Crude, Peanut And Mineral Oil, Okey Umejuru

LSU Master's Theses

Nearly every continent has species of crawfish that inhabit wetlands or are near coastal areas where petroleum and other oils are produced, transported, and accidentally released. Most crawfish cannot tolerate polluted water. Thus, they could serve as biomonitors of fossil fuel, biofuel, and other oil releases and assess potential negative impacts such oils have on wetland and coastal ecosystems. The objectives of this study were to estimate the acute toxicity of three oils to juvenile crawfish and determine if toxicity was due to poisoning or interference with oxygen transfer across the gills. Juvenile crawfish (Procambarus clarkii) were tested for acute …

Go to article

Receptor-Mediated Calcium Entry In Retinal Amacrine Cells, Scott Michael Crousillac Jan 2007

Receptor-Mediated Calcium Entry In Retinal Amacrine Cells, Scott Michael Crousillac

LSU Doctoral Dissertations

In the vertebrate retina, multiple cell types express g protein-coupled receptors linked to phospholipase C. The signaling pathway engendered by activation of this enzyme can involve Ca2+-permeable transient receptor potential (TRP) channels. To begin to understand the role of these channels in the retina, we undertake an immunocytochemical localization of two TRPC channel subunits, TRPC1 and TRPC4. TRPC1 expression was observed in amacrine cells and their process in the chicken retina. TRPC4 expression was much more widespread with some degree of labeling found in all layers of the retina, and was shown to be expressed in Müller glial …

Go to article

Locally Derived Nonpoint Loading Estimates For The Boeuf River/Bayou Lafourche Watershed, Emerald Purser Roider Jan 2007

Locally Derived Nonpoint Loading Estimates For The Boeuf River/Bayou Lafourche Watershed, Emerald Purser Roider

LSU Doctoral Dissertations

There is currently a great demand for data and models that can be used to quantify nonpoint source pollutant loads from different land-use types. The Louisiana Department of Environmental Quality (LDEQ) is in the process of implementing management programs for impacted water bodies based on the Total Maximum Daily Load (TMDL) of a pollutant. Pollutants of concern include total suspended solids (TSS), nitrogen, and phosphorus. One of the key parameters in determining the TMDL of a water body is the nonpoint source pollutant load from different land-use types. To date, such load estimates in Louisiana are lacking. The primary objective …

Go to article

Fever, Firepower, And Flood: The Transformation Of The Missouri River Bottomlands In The Dakotas 1804-2005, Robert A. Dunn Jan 2007

Fever, Firepower, And Flood: The Transformation Of The Missouri River Bottomlands In The Dakotas 1804-2005, Robert A. Dunn

LSU Doctoral Dissertations

This dissertation focuses on the indigneous geography of the Missouri River Valley of the Dakotas. Since Lewis and Clark's expedition in 1804, this landscape has been transformed by two externally introduced components, reservations and reservoirs. To move the native tribes out of the way of an expanding American empire in the mid-19th century, the U.S. Government confined the tribes to territories, then to reservations, which grew smaller as each new wave of Euro-American immigration launched more land-taking by the federal government. To ensure military and political control over the tribes, the U.S. government supported the efforts of hide hunters to …

Go to article

Comparing Kin And Non-Kin Foster Parents' Emotional Investment In Their Young Children, Rhonda Norwood Jan 2007

Comparing Kin And Non-Kin Foster Parents' Emotional Investment In Their Young Children, Rhonda Norwood

LSU Doctoral Dissertations

In 2003, there were reports of child maltreatment affecting over 5.5 million children in the United States. As a result of this epidemic, over 500,000 children are in foster care with an estimated additional 300,000 in voluntary kin placements. Because of a shortage of foster families and resources, Child Protective Services (CPS) agencies routinely seek and give priority to family members to serve as foster families to maltreated children. There is a large body of research that demonstrates that children in kinship care are often at greater risk than those children placed in non-kin foster homes, particularly in terms of …

Go to article

Vascular Function, Physical Performance And Aging, Devon Dobrosielski Jan 2007

Vascular Function, Physical Performance And Aging, Devon Dobrosielski

LSU Doctoral Dissertations

This is a series of three experiments with brachial artery flow-mediated dilation (BAFMD) as the major outcome variable. The first study examined the temporal response of the brachial artery diameter following forearm occlusion in sixteen young (28±8 years) and fifteen older (85±8 years) men. Following release of the pressure cuff there is a significant reduction in brachial diameter compared to baseline, followed by a rapid increase to a PEAK. When comparing the magnitude of the decrease in diameter and the BAFMD between Young and Old, older subjects demonstrated a blunted response. A significant relation was noted between the magnitude of …

Go to article

Dna-Binding And Oligomerization Properties Of A Functionally Distinct Dps Homolog, Dps-1 From Deinococcus Radiodurans, Gargi Bhattacharyya Jan 2007

Dna-Binding And Oligomerization Properties Of A Functionally Distinct Dps Homolog, Dps-1 From Deinococcus Radiodurans, Gargi Bhattacharyya

LSU Doctoral Dissertations

Dps (DNA protection during starvation) proteins play an important role in the protection of prokaryotic macromolecules from damage by reactive oxygen species. The Dps homolog, Dps-1, from the radiation-resistant bacterium Deinococcus radiodurans has an extended N-terminal tail. In the crystal structure of Dps-1, the first ~30 N-terminal residues are invisible and the remaining 25 residues form a loop that harbors a novel metal binding site. The data presented here show that retention of this N-terminal metal site is necessary for formation of the dodecameric protein assembly. Previous studies have suggested that the lysine-rich N-terminus of Dps proteins participates in DNA …

Go to article

The Politics Of Improvement: Internal Improvements, Sectionalism, And Slavery In Mississippi 1820-1837, Sam Beardsley Todd Jan 2007

The Politics Of Improvement: Internal Improvements, Sectionalism, And Slavery In Mississippi 1820-1837, Sam Beardsley Todd

LSU Master's Theses

The increased consensus among historians that the emergence of a market revolution engendered widespread economic, political, and social changes throughout the second quarter of nineteenth-century America has brought a number of provocative questions to bear on the antebellum South. Among the most provocative is the assertion that during the 1830s, a strain of reform-minded southern planters took it upon themselves to integrate the regions subsistence farmers into the market economy. The historian Harry Watson has asserted that a small, but influential, group of southern planters sought to confront Dixie’s dilemma of pursuing a modern economy without cutting ties with the …

Go to article

Protocol Development For Pro-Active Emergency Responses By Veterinary Clinics And Hospitals, Laura Marie Basirico Jan 2007

Protocol Development For Pro-Active Emergency Responses By Veterinary Clinics And Hospitals, Laura Marie Basirico

LSU Master's Theses

The Gulf Coast hurricanes of 2005 necessitated the development of a guidance document concerning emergency preparedness and response for veterinary clinics and hospitals. The aftermaths of the largest natural disasters in United States' history, namely Hurricanes Katrina and Rita, brought to light the need for a protocol designed specifically for veterinarians and veterinary practitioners. Disaster management information was synthesized and modified to be subject-specific for the veterinary community. This synthesis resulted in the creation of the Veterinary Emergency Preparedness and Response (VEPR) manual and website. Two types of data were collected to develop the emergency protocol; interviews with veterinarians and …

Go to article

Effects Of Predator Activity On The Nesting Of American Black Ducks And Other Birds On Barrier Islands In The Mid-Atlantic Coast, Brian Joseph Arquilla Jan 2007

Effects Of Predator Activity On The Nesting Of American Black Ducks And Other Birds On Barrier Islands In The Mid-Atlantic Coast, Brian Joseph Arquilla

LSU Master's Theses

Landscape change throughout North America has resulted in heightened nest predator population and declining avian productivity. Essential to establishing effective management design is an understanding of differential predation pressure among avian groups as group specific responses to predation impact may exist. The objective of this study was to examine the efficacy of predator trapping on the nest success and density of ground nesting avifauna in 2004-2005 in the Virginia Coast Reserve, specifically dabbling ducks, Canada Goose and Willet. Second, we determine the impact of predation on ground nesting birds by relating indices of predator abundance to nest density and nest …

Go to article

Chemical Differences Of Atherosclerotic Plaques In Native And Bypass Human Coronary Arteries And Diseased And Non-Diseased Human Aortas, Samuel Jean Washington Jan 2007

Chemical Differences Of Atherosclerotic Plaques In Native And Bypass Human Coronary Arteries And Diseased And Non-Diseased Human Aortas, Samuel Jean Washington

LSU Doctoral Dissertations

ABSTRACT Cardiovascular disease, primarily atherosclerosis involves a number of distinct processes that are associated with plaque development. The use of differential gel electrophoresis to determine differences between proteins produced in native and bypass coronary arteries from the same heart has been studied. The analytical techniques presented in this study to characterize plaque samples include two dimensional gel electrophoresis, sodium dodecylsulfate polyacrylamide gel electrophoresis, mass spectrometry, differential gel electrophoresis, and high performance liquid chromatography. An overview of the stages involved in atherosclerosis and the theories implicated in the manifestation of atherosclerosis was presented. A design study using the Box Behnken method …

Go to article

In Utero And In Vitro Sex Ratio Of Bovine Embryos And Calves Originating From The Left And Right Ovaries, Darin Alan Hylan Jan 2007

In Utero And In Vitro Sex Ratio Of Bovine Embryos And Calves Originating From The Left And Right Ovaries, Darin Alan Hylan

LSU Doctoral Dissertations

An asymmetric distribution of the sexes within the left and right uterine horns has been described in multiple polytocous, laboratory species. A series of experiments were conducted to evaluate the sex ratio (% male) of calves gestated in the left and right uterine horns, as well as the sex ratio of embryos originating from the left and right ovaries of cattle. In Experiment 1, the sex ratio of calves and fetuses gestated in the left and right uterine horns was investigated. The sex ratio of calves and fetuses gestated in the right uterine horn was significantly higher compared with the …

Go to article

Carprofen Compromises The Integrity And Barrier Function Of The Colonic Mucosa Of The Dog, Catherine Alix Briere Jan 2007

Carprofen Compromises The Integrity And Barrier Function Of The Colonic Mucosa Of The Dog, Catherine Alix Briere

LSU Master's Theses

Effects of carprofen on colon of dog have not been investigated. Objectives 1) Measure conductance and permeability to mannitol of transverse, proximal descending and distal descending colonic mucosa of dog. 2) Measure conductance and permeability to mannitol of colonic mucosa of dog in presence of carprofen. Design In vitro experimental - nested, randomized block design Animals Colonic mucosa from 6 (objective 1) and 7 (objective 2) mature mixed-breed dogs. Methods Objective 1) Control - Three sections of mucosa from each region of colon were mounted in Ussing chamber units. Conductance was calculated every 15 min for 240 min. Flux of …

Go to article

Cryopreservation Of White-Tail Deer Epididymal Sperm For Artificial Insemination, Jesse Ray Saenz Jan 2007

Cryopreservation Of White-Tail Deer Epididymal Sperm For Artificial Insemination, Jesse Ray Saenz

LSU Master's Theses

The ability to cryopreserve epididymal sperm from mature postmortem bucks has long been of interest to both wildlife conservationists and deer ranchers. Increased understanding of the cryobiology of epididymal sperm from a non domestic species, such as White-tail deer, could aid in development of future protocols to assist in the preservation of endangered species. In Experiment I, results showed that after cooling postmortem bull testes for 22 hours, no significant difference was noted between sperm parameters of epididymal sperm collected at room temperature or at a cool enviorment. In Experiment II, it was shown that White-tail deer sperm could be …

Go to article

The Influence Of Enrollment In Agriscience Education Courses On Student Achievement Of High School Students In Louisiana, Paul Joseph Theriot Jan 2007

The Influence Of Enrollment In Agriscience Education Courses On Student Achievement Of High School Students In Louisiana, Paul Joseph Theriot

LSU Doctoral Dissertations

The purpose of this study was to compare academic achievement of high school students in Louisiana by whether or not they are identified as an agriscience education student. The rationale for the study is to determine if agriscience education contributes to the academic achievement of high school students. The Louisiana Educational Assessment Program (LEAP) Graduate Exit Exams were used to measure academic achievement. All graduate exit exam test scores for the 2004-2005 school year were utilized for the study. The data for this study came from the Louisiana Department of Education. The study described all 10th and 11th grade students …

Go to article

Synaptic Boojums: Lewis Carroll, Linguistic Nonsense, And Cyberpunk, Jennifer Kelso Farrell Jan 2007

Synaptic Boojums: Lewis Carroll, Linguistic Nonsense, And Cyberpunk, Jennifer Kelso Farrell

LSU Doctoral Dissertations

Tracing a line from Lewis Carroll to 20th-century science fiction and cyberpunk, this project establishes an alternate genealogy based on the use of linguistic nonsense. Science fiction, rather than being merely a genre defined by specific narrative devices or character traits, is instead a language in and of itself. And like any language, it must be learned in order to be understood. Carroll used nonsense as a means of subverting conventional 19th-century opinions of language and, and by extension, society. Carroll was so successful at this that in 1937 American psychiatrist Paul Schilder discussed the dangers to a child's mind …

Go to article

In Vitro Development Of Bovine Embryos Cultured In A Frozen-Thawed Commercial Culture Medium, Jeanne Lee Glaser Jan 2007

In Vitro Development Of Bovine Embryos Cultured In A Frozen-Thawed Commercial Culture Medium, Jeanne Lee Glaser

LSU Master's Theses

As in vitro fertilization (IVF) becomes more acceptable for the treatment of human infertility, it is essential for clinics to have in place an optimal embryo culture system. The objective of this study was to evaluate whether freezing and storing human embryo culture medium will alter embryo post-thaw viability. In consecutive experiments, commercial culture medium was frozen at -20°C and at -80°C and stored at 4°C until its use in IVF. Each IVF-derived replicate of bovine embryos contained a laboratory control group, a fresh commercial culture medium group(s) and a frozen-thawed commercial culture medium group(s). The commercial culture medium was …

Go to article

An Hedonic Analysis Of Southwestern Louisiana Wetland Prices Using Gis, Baifu Xu Jan 2007

An Hedonic Analysis Of Southwestern Louisiana Wetland Prices Using Gis, Baifu Xu

LSU Master's Theses

Louisiana is the beneficiary of more than 30% of the U.S. coastal wetlands, but the state’s wetland loss accounts for about 90% of the total throughout the continental United States. The Coastal Wetlands Planning, Protection and Restoration Act of 1990 and the $1.9 billion that has recently been dedicated by Congress for coastal restoration activities will certainly aid in restoration efforts. However, these dedicated funds are but a small fraction of the total monies that will be required to maintain/restore Louisiana’s degraded wetlands. Recent estimates suggest restoration activities will cost, at a minimum, about $14 billion. The research, based on …

Go to article

Targeting Axon Growth From Neurons Transplantedinto The Central Nervous System, Kristine S. Ziemba Jan 2007

Targeting Axon Growth From Neurons Transplantedinto The Central Nervous System, Kristine S. Ziemba

University of Kentucky Doctoral Dissertations

Damage to the adult mammalian central nervous system (CNS), either by traumatic injury or disease, usually results in permanent sensory and/or motor deficits. Regeneration of neural circuits is limited both by the lack of growthpromoting molecules and by the presence of growth-inhibitory molecules in the mature brain and spinal cord. The research described here examines the therapeutic potential of viral vectors and neuronal transplants to reconstruct damaged neural pathways in the CNS. Experimental neural transplantation techniques often fall short of expectations because of limited transplant survival and insufficient neurite outgrowth to repair connections and induce behavioral recovery. These shortcomings are …

Go to article

Role Of Heparanase And Heparanase-Degraded Heparan Sulfate In Brain-Metastatic Melanoma, Madhuchhanda Roy Jan 2007

Role Of Heparanase And Heparanase-Degraded Heparan Sulfate In Brain-Metastatic Melanoma, Madhuchhanda Roy

LSU Doctoral Dissertations

Cancer metastasis is a frequent manifestation of malignant melanoma progression. Successful invasion into distant organs by tumor cells must include attachment to microvessel endothelial cells, and degradation of extracellular matrix. Heparan sulfate proteoglycans are ubiquitous macromolecules associated with cell surface and extracellular matrix of a wide range of cells and tissues. Heparanase is an extracellular matrix degradative enzyme which degrades the heparan sulfate chains of heparan sulfate proteoglycans. To investigate effects of changes in heparanase gene expression in metastatic melanoma cells, we constructed adenoviral vectors containing the full-length human heparanase cDNA in both sense (Ad-S/hep) and anti-sense orientations (Ad-AS/hep). We …

Go to article

Alphabetic And Phonemic Awareness In Toddlers, Pamela A. Terrell Jan 2007

Alphabetic And Phonemic Awareness In Toddlers, Pamela A. Terrell

LSU Doctoral Dissertations

The ability of 20-24 month-old toddlers to recognize graphemes and phonemes was investigated by reading a Phonic Faces (PF) alphabet picture book. Phonic Faces iconically picture a letter in the mouth of a character producing the sound (the curve of the P looks like the top lip popping the /p/ sound). The book was composed of nine letters and was read individually to experimental subjects three times weekly for six weeks. The control group received no treatment, but engaged in individual play activities for comparable time. Following six-weeks the groups alternated so the former control group now received the alphabet …

Go to article

Applying Reaction Time (Rt) And Event-Related Potential (Erps) Measures To Detect Malingered Neurocognitive Deficit, Victoria Louise Vagnini Jan 2007

Applying Reaction Time (Rt) And Event-Related Potential (Erps) Measures To Detect Malingered Neurocognitive Deficit, Victoria Louise Vagnini

University of Kentucky Doctoral Dissertations

This study examined the ability of reaction time (RT) and Event-Related Potentials (ERP) to detect malingered neurocognitive deficit (MNCD)in two new tasks compared to the TOMM (N = 47). Honest (HON), malingering (MAL), and traumatic brain injury (TBI) groups were compared on accuracy, RT and ERP measures. Overall, the Test of Memory Malingering (TOMM) accuracy was the most effective at classifying groups (hit rate = 100%). Several non-TOMM accuracy variables and RT variables reached hit rates in the range of 71%-88%. The TOMM RT variable had an unlimited time for participants to respond and was the most successful RT variable …

Go to article

Using Group Dynamics And Personality Characteristics To Form Learning Groups In High School Multimedia Courses, Kimberly Nichols Laprairie Jan 2007

Using Group Dynamics And Personality Characteristics To Form Learning Groups In High School Multimedia Courses, Kimberly Nichols Laprairie

LSU Doctoral Dissertations

The purpose of this study was to provide insights into Emergenetics® STEPTM personality profiling as a selection and placement strategy to enhance process and performance in high school learning groups. An explanatory case study was conducted in a private high school currently subscribing to the Emergenetics® STEPTM program. Emergenetics® STEPTM Profile results of students enrolled in the school’s six Multimedia Productions courses were analyzed as the basis for learning group construction. Key individual thinking preferences (Analytical, Structural, Social, Conceptual) identified by the STEPTM Profile was the main variable of analysis. One learning group from each of the six classes (n …

Go to article

Abstract For A Look At Attitude And Achievement As A Result Of Self-Regulated Learning In The Algebra I Classroom, Darin Craig Schroeder Jan 2007

Abstract For A Look At Attitude And Achievement As A Result Of Self-Regulated Learning In The Algebra I Classroom, Darin Craig Schroeder

University of Kentucky Doctoral Dissertations

Not often do mathematics teachers instruct to improve students' attitudes toward mathematics. The pressures to cover the state-mandated curriculum drive teachers to instruct for procedural understanding with few connections. The lack of real-life connections results in students with low motivation toward mathematics and results in poor mathematics attitude (Ma andamp; Kishor, 1997). The purpose of this mixed-methods research is to examine self-regulated learning as an instructional technique aimed at increasing mathematical attitudes while also increasing achievement and to reveal barriers to its implementation in the classroom.The research study involved an intervention in a Mid-South urban high school at the 9th …

Go to article

Detoxification Of Selected Chloro-Organics By Oxidation Technique Using Chelate Modified Fenton Reaction, Yongchao Li Jan 2007

Detoxification Of Selected Chloro-Organics By Oxidation Technique Using Chelate Modified Fenton Reaction, Yongchao Li

University of Kentucky Doctoral Dissertations

The use of hydroxyl radical based reaction (Fenton reaction) for the destruction of organic pollutants has been widely reported in the literature. However, the low pH requirement and rapid hydrogen peroxide consumption rate make the application of conventional Fenton reaction difficult for in-situ treatment. In this study, we conducted a modified Fenton reaction by introducing a chelating agent into the reaction system that could prevent Fe(OH)3 (s) precipitation even at a neutral pH condition and reduce the H2O2 consumption rate by controlling the Fe2+ concentration. A chelating agent (mono-chelate or poly-chelate) combines with Fe2+ or Fe3+ to form stable metal-chelate …

Go to article

Influences Of Chromium (Iii) Picolinate On Pigs Under Thermal, Immune Or Dietary Stress, And On Adrenal Steroid Secretion, Beob Gyun Kim Jan 2007

Influences Of Chromium (Iii) Picolinate On Pigs Under Thermal, Immune Or Dietary Stress, And On Adrenal Steroid Secretion, Beob Gyun Kim

University of Kentucky Doctoral Dissertations

The objectives were to investigate the effects of chromium (III) picolinate (CrPic; up to 2,000 ppb of Cr) on growing pigs subjected to a variety of stressors including thermal, immune, or dietary stress and to examine the effects of CrPic on steroidogenesis from adrenocortical cells. In the thermal stress study, high ambient temperature caused reduced weight gain and feed consumption (P andlt; 0.01), and low ambient temperature caused increased feed intake and feed:gain (P andlt; 0.01). However, these effects were not moderated by CrPic, and respiratory rate, plasma cortisol, or plasma glucose were unaffected by CrPic. In the immune stress …

Go to article

First Prev Next Last