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The Fate Of Iron Released From Heme By Hemeoxygenase-1, Jonathan Mark Gardner
The Fate Of Iron Released From Heme By Hemeoxygenase-1, Jonathan Mark Gardner
Undergraduate Honors Capstone Projects
A strain of Escherichia coli was genetically modified to co-express human heme oxygenase-1 and ferritin. The E. coli were then grown with varying amounts of hemin to see if the iron released upon degradation of the hemin by heme oxygenase-1 is loaded into ferritin. Following incubation, the ferritin was purified and the amount of iron loaded into ferritin determined. It was found that ferritin purifed from E. coli expressing human heme oxygenase-1 contained more iron than E. coli that did not contain human heme oxygenase-1. It was concluded that some of the iron released upon degradation of hemin by heme …
Oxidative Damage Caused By Iron Loading Into Ferritin, Talina Christensen Watts
Oxidative Damage Caused By Iron Loading Into Ferritin, Talina Christensen Watts
Undergraduate Honors Capstone Projects
Ferritin is the iron storage protein found in humans, animals, plants, fungi and bacteria. We are interested in how iron is loaded and stored in mammalian ferritin. Ferrous iron must be oxidized to ferric iron in order to be stored in ferritin. It is generally believed that ferritin does the loading itself, dependant upon a "ferroxidase activity." Oxidation of iron can result in the production of the hydroxyl radical which can cause oxidative damage to surrounding proteins and other biomolecules. An indicator of oxidative damage to proteins is the formation of carbonyl groups. Using only the H subunit of human …
Role Of Iron In The Mechanism Of Asbestos-Induced Apoptosis In Human Lung And Pleural Target Cells, Aleksander Baldys
Role Of Iron In The Mechanism Of Asbestos-Induced Apoptosis In Human Lung And Pleural Target Cells, Aleksander Baldys
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Occupational exposure to asbestos has been associated with increased incidence of pulmonary interstitial fibrosis, mesothelioma of the pleura, and bronchogenic carcinoma. Although the mechanism by which asbestos causes cancer remains unknown, iron associated with asbestos is thought to play a role in the pathogenic effects of fibers.
The aim of this research was to examine and compare the asbestos-induced signaling phenomena in relevant human lung and pleural target cells, and to determine the role of iron from asbestos fibers in these events. Exposure of human airway epithelial (A549) cells, human pleural mesothelial (MET5A) cells, and normal human small airway epithelial …
Bioavailability/Toxicity Of Iron From Aerobically Processed Organic Fertilizer, Stacey Marie Wilson
Bioavailability/Toxicity Of Iron From Aerobically Processed Organic Fertilizer, Stacey Marie Wilson
Undergraduate Honors Capstone Projects
For an undergraduate Honor's project, I worked under the direction of Dr. Jeffery Hall to determine the bioavailability and toxicity of iron from Milorganite® fertilizer, an aerobically processed organic fertilizer. The Milorganite® Company is a subsidiary of the Milwaukee Municipal Sewage District and produces a fertilizer of high iron content (approximately 5-7%). The high iron content has resulted in concern about the toxic potential, which until now was unknown. This thesis paper will explain iron chemistry, bioavailability, requirements, absorption, toxicity, and treatments, followed by a description of fertilizer types and contents. This will be followed by a description and reasoning …
The Efficacy Of Plant Residue Degradation Products On Phosphorus, Iron, Iodine, And Fluorine Bioavailability To Plants, Cheryl L. Mackowiak
The Efficacy Of Plant Residue Degradation Products On Phosphorus, Iron, Iodine, And Fluorine Bioavailability To Plants, Cheryl L. Mackowiak
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Plant and animal wastes degrade in soils to form relatively stable humified compounds, which form ion complexes that affect the bioavailability of elements in the soil solution. Hydroponic studies with wheat and rice were conducted to characterize the effect of humic acid (HA) on phosphorus (P), iron (Fe), fluorine (F), and iodine (I) bioavailability. Ferrihydrite [Fe(OH)3] precipitation was greater on root surfaces without HA or synthetic chelates. Oxides such as ferrihydrite strongly adsorb P and provide exchange sites for metals. HA reduced this precipitate and increased P and Fe uptake.
Humic acid had no effect on F toxicity …
The Role Of Iron And Reactive Oxygen Species In Particulate Air Pollution-Dependent Biochemical And Biological Activities, Kevin Richard Smith
The Role Of Iron And Reactive Oxygen Species In Particulate Air Pollution-Dependent Biochemical And Biological Activities, Kevin Richard Smith
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Particulate air pollution is known to exacerbate respiratory diseases, such as asthma and chronic obstructive pulmonary disease, in humans. It has been proposed that transition meta ls from inhaled particles may play a role in this exacerbation by generating radical species leading to damage in the lungs.
The aim of this research was to determine the role that iron from particulate air pollution played in the generation of reactive oxygen species and subsequently the induction of inflammatory mediators in cells in culture. The production of reactive oxygen species by particulate air pollution was found to be dependent on the mobilization …
The Role Of Ferritin In Iron Regulation, Rick White Obray
The Role Of Ferritin In Iron Regulation, Rick White Obray
Undergraduate Honors Capstone Projects
Iron plays a critical role in biological systems. Its variable redox properties make it a tremendously versatile element. It is involved in numerous cellular processes including; oxygen transport, nucleotide synthesis, nitrogen fixation, electron transport and a host of metabolic reactions. Without it, nearly all life would cease to function. However, under certain circumstances iron can be extremely detrimental to biological systems and has been linked to numerous pathologies, including cancer, diabetes, Parkinson's disease, Alzheimer's and atherosclerosis. In the presence oxygen, Fe(II) is rapidly oxidized to Fe(III), and oxygen is reduced to potentially deleterious oxygen radicals (1). These radicals, especially the …
Relative Absorption Of Iron And Magnesium From Sulfate Salts, Amino Acid Chelates Complexed And/Or Mixed With Vegetables, And Taste-Free Supplements, Jennifer A. Bowden
Relative Absorption Of Iron And Magnesium From Sulfate Salts, Amino Acid Chelates Complexed And/Or Mixed With Vegetables, And Taste-Free Supplements, Jennifer A. Bowden
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Common methods for determining mineral absorption by the body are invasive and frequently utilize radioisotopes. In experiment one. rats were given a dose of radiolabeled ferrous sulfate. Relative absorption was estimated by changes in serum iron and by appearance of the radiotracer in the serum. There were no differences in relative absorption determined by the methods, although the low overall absorptions by the iron-replete rats may have decreased the sensitivity.
In experiments two and three. iron and magnesium supplements were given orally to 12 women age 19-25. Each subject received iron and magnesium supplements once each week for 5 weeks. …
Fats And Iron In The Rat Colon: Effects On Lipid Peroxidation, Ji Jenny Chin
Fats And Iron In The Rat Colon: Effects On Lipid Peroxidation, Ji Jenny Chin
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Preliminary studies were undertaken to investigate whether or not added iron (0, 35, 880 ppm of iron as ferrous fumarate) and fat type (corn oil, beef tallow, or menhaden oil) influenced the oxidation of the rat diet during storage. Iron level affected thiobarbituric acid (TBA) values only in the menhaden oil diets. Storage for 4 d did not affect TBA values of the diets. Neither food intake nor body weight of the rats was affected by the different diets, suggesting all diets were equally acceptable to rats.
The effects of iron supplementation and fat type on in vivo lipid peroxidation …
Iron-Dithiothreitol Dependent Production Of 8-Hydroxy-2'-Deoxyguanosine In Dna, David Allan Cook
Iron-Dithiothreitol Dependent Production Of 8-Hydroxy-2'-Deoxyguanosine In Dna, David Allan Cook
Undergraduate Honors Capstone Projects
Oxidative damage to DNA in a metal-thiol system was studied. Calf thymus DNA was incubated in an iron(IIl)-dithiothreitol system prepared in various buffers. Damage was measured by monitoring the production of 8-hydroxy-2'-deoxyguanosine. DNA oxidation was proportional to the concentration of dithiothreitol (DTT) in HEPES and tris(hydroxymethyl)aminomethane (Tris) buffers while it was only roughly related to DTT concentration in sodium chloride. Incubation in potassium phosphate buffer produced no damage. The results indicate that hydroxyl radicals may be generated by the iron-OTT system in HEPES, Tris, and sodium chloride, while in the phosphate buffer an iron phosphate complex may be formed which …
Effect Of Iron Binding On The Ability Of Crocidolite To Cause Dna Single-Strand Breaks, Jeanne Ann Hardy
Effect Of Iron Binding On The Ability Of Crocidolite To Cause Dna Single-Strand Breaks, Jeanne Ann Hardy
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Fibrous carcinogens, such as crocidolite asbestos, are known to catalyze many of the same reactions as iron, namely O2 consumption, generation of reduced oxygen species, and damage to DNA, such as strand breaks, and modifications of bases. Upon inhalation, fibers are also known to become coated with an iron-rich material. The mechanism by which this iron is bound to fibers in the lung is not known, and the effect of this additional iron on the reactivity of the fibers is also not well understood. The studies described here were undertaken to elucidate the abilities of crocidolite asbestos, in its …
Mobilization Of Iron Enhances The Iron-Dependent Biochemical Reactivity Of Asbestos In Vitro And Contributes To The Cytotoxicity Of Asbestos In Cultured Cells, Loren Glen Lund
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Asbestos related research began approximately 60 years ago, yet, the mechanism(s) by which asbestos exerts its biological effects is not well understood. The hypothesis upon which this dissertation is based is that mobilization of iron from asbestos enhances the iron-dependent biochemical reactivity of asbestos in vitro and contributes to asbestos-dependent cytotoxicity. The specific aims for this hypothesis were, 1) to determine whether iron was responsible for the biochemical reactivity of asbestos in vitro and asbestos-induced cytotoxicity in cultured cells, and 2) to determine whether mobilization of iron from asbestos enhanced the reactions catalyzed by asbestos in vitro and contributes to …
Selenium And Iron In The Rat Intestine: Effects On Lipid Peroxidation, Sileny Vega
Selenium And Iron In The Rat Intestine: Effects On Lipid Peroxidation, Sileny Vega
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Effects of Fe and Se status on GSHPx activity and lipid peroxidation in liver and intestinal mucosa were studied. Rats were Se and Fe supplemented (+Se+Fe), Se-deficient and Fe-supplemented (-Se+Fe), Se supplemented and Fe overloaded (+Se++Fe) by intramuscular injection, or Se deficient and Fe overloaded (-Se++Fe) for 20d. Fe overloaded tissues had more Fe, but hemoglobin was unaffected. Liver and mucosal GSHPx activity was low in Se-deficient rats. Thiobarbituric acid reactive substances (TBARS) were higher in Fe overloaded and -Se++Fe vs +Se++Fe tissues. Mucosal TBARS was higher in -Se++Fe rats gavaged with CBrCl3. In experiment 2, Fe overload …
Change In Serum Iron As A Measure Of Bioavailability Of Dietary Iron, Mary Beth Wright
Change In Serum Iron As A Measure Of Bioavailability Of Dietary Iron, Mary Beth Wright
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Methods currently used to determine iron bioavailability have disadvantages for both the subjects and researchers involved. One safe and simple method that needs further evaluation, the serum iron absorption method, involves an initial blood drawing, dosages of iron, and blood drawings taken at intervals thereafter. Generally, the rise in serum iron or area under the curve is used to determine iron uptake. Two experiments were conducted using the serum iron absorption method in an effort to improve the utility of this method for the measurement of iron bioavailability. With this effort in mind, an equation adjusting for dose of iron …
A Longitudinal Study Of Dietary Intake And Influence Of Iron Status On Infants' And Toddlers' Mental And Motor Development, Steven Matley Wood
A Longitudinal Study Of Dietary Intake And Influence Of Iron Status On Infants' And Toddlers' Mental And Motor Development, Steven Matley Wood
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Thirty-two non-anemic children were assessed clinically, biochemically and anthropometrically at six months, one year and two years of age to investigate the relationship of iron status to mental and motor development. Using dietary history and dietary record instruments, dietary iron was estimated and compared to the National Food Consumption Survey (1985) and the Recommended Dietary Allowances (RDA) for corresponding age groups. The Bayley Scales of Infant Development (which assess mental and motor development) and the Caldwell Home Inventory (which evaluates the environmental stimuli) were performed and correlated with blood iron parameters, anthropometric measurements and dietary nutrient intakes.
Nutrient intakes of …
The Bioavailability Of Iron From Meat, Spinach, Soy Protein Isolate, Meat:Spinach And Meat:Spi Mixtures Fed To Anemic And Healthy Rats, Dejia Zhang
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Two Experiments were conducted to investigate the effect of iron status and iron source on iron bioavailability using the rat model. Beef was proportionally mixed with spinach (Experiment I) or soy protein isolate (Experiment II) to test if meat enhances the absorption of iron from spinach or SPI. Five diets with the iron from meat:spinach (or SPI) ratios of 100:0, 75:25, 50:50, 25:75 and 0:100 were prepared and fed to rats. FeS04 was used as a reference. Two trials of rats were used in Experiment I. In trial I, half of the rats were made severely iron deficient (Hb 6.3 …
Maternal Iron Parameters And Diet: Influence On Infant Iron Parameters And Development, Janet Bradshaw Anderson
Maternal Iron Parameters And Diet: Influence On Infant Iron Parameters And Development, Janet Bradshaw Anderson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The purpose of this study was to determine and evaluate the dietary intake of pregnant women living in this geographical area, evaluate how their diets related to their iron status, how their nutrient intakes compared with other studies, and how their iron status and diet affected infant iron status and development, as assessed by the Bayley Scale of Infant Development.
The study involved 32 pregnant women who were between 8 to 14 weeks gestation and 20 to 35 years of age. They were followed through pregnancy and their infants were followed until three months of age.
Three-day dietary records, a …
Iron Bioavailability Of Meat:Bread Mixtures And Meat Loaves Fed To Anemic And Healthy Rats, Abdullah M. Thannoun
Iron Bioavailability Of Meat:Bread Mixtures And Meat Loaves Fed To Anemic And Healthy Rats, Abdullah M. Thannoun
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
To study the effect of meat (beef) on dietary iron bioavailability from enriched white bread (EWB) or whole wheat bread (WWB), diets were prepared in which the ratios of beef iron to bread iron were 100:0, 75:25, 50:50, 25:75 or 0:100. Hemoglobin regeneration efficiency (HRE), apparent iron absorption, and dry matter absorption were determined using weanling anemic and healthy male rats.
Meat iron was more available than EWB or WWB. Fortification iron in EWB was less available than the iron naturally present in WWB. At the iron dose given, HRE was similar for both anemic and healthy rats. Although healthy …
Effect Of Iron On Residual Nitrite Level In Ground Pork And Model Systems, Changmin Kim
Effect Of Iron On Residual Nitrite Level In Ground Pork And Model Systems, Changmin Kim
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The effects of iron, temperature, and presence of botulinal spores or sodium ascorbate on depletion of nitrite level were determined in meat and model systems. Higher temperature and presence of botulinal spores definitely increased nitrite depletion in a meat system. Added hemoglobin also significantly increased nitrite depletion, while ferrous iron and ferric iron did not significantly decrease nitrite level in a meat system. High temperature and presence of sodium ascorbate increased nitrite depletion in a model system. Only ferrous iron significantly decreased nitrite level in the absence of ascorbate, while ferric iron, heme iron, and ferritin iron did not decrease …
The Isolation And Characterization Of A Novel Iron Protein From Desulfovibrio Gigas, Alan Kay Smith
The Isolation And Characterization Of A Novel Iron Protein From Desulfovibrio Gigas, Alan Kay Smith
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The isolation, purification, and partial characterization of a novel iron-containing protein from the sulfate-reducing anaerobic bacterium, Desulfovibrio gigas, is described. The highly insoluble protein was isolated from the cell debris following osmotic shock of the bacteria. The insoluble fraction consistently contained about 90% of the cell-associated iron. This protein was treated with acid, chelating agents, detergents and proteases in order to study their effect on the iron solubility. The results of elemental analysis of a crude protein preparation were 5.3% iron, 2.9% sulfur and 11 .9% nitrogen. An independent colorimetric iron analysis showed 6.4% iron. The iron could be …
Bioavailability Of Calcium, Fluoride And Iron In Mechanically-Deboned Beef Fed To Growing Rats, Kathryn Mclaughlin
Bioavailability Of Calcium, Fluoride And Iron In Mechanically-Deboned Beef Fed To Growing Rats, Kathryn Mclaughlin
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Weanling rats were fed diets containing raw lyophylized hand-deboned shank beef (HDS) supplemented with CaCO3, retorted lyophylized mechanically deboned shank beef (MDS), or raw lyophylized MDS. Ca in the latter two diets originated from bone during the mechanical deboning process. Ca absorption, Ca retention, bone weight, and bone breaking strength were similar for comparative dietary levels of Ca regardless of the source. Bone ash and Ca content was significantly higher (P < .05) in the MDS 393 (3.93 g Ca/kg diet) diet and in the retorted MDS 460 diet compared with the HDS 488 diet. Relative biological values for the MDS diets calculated relative to the HDS diets ranged from 102 to 132 when the linear regression of Ca consumed, Ca retained, or dietary Ca level vs bone ash or bone Ca content was obtained. The retorted MDS 460 diet contained the highest Fe level and exhibited a lower percent absorption, terminal hemoglobin level, and liver Fe storage. Humerus F content increased as dietary F (also present from bone) level increased. Dietary F level did not determine humerus breaking strength.
The Transport And Intracellular Distribution Of Iron In The Basidiomycete, Ustilago Sphaerogena, Charles W. Passavant
The Transport And Intracellular Distribution Of Iron In The Basidiomycete, Ustilago Sphaerogena, Charles W. Passavant
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The transport and intracellular distribution of iron in Ustilago sphaerogena via the native siderochrome ferrichrome A has been examined. Evidence is presented which suggests the involvement of deferriferrichrome in iron transport when the metal is supplied to the cell as ferrichrome A. This process requires both oxygen and ATP synthesis and may require a transmembrane electrochemical gradient. Once inside the cell, iron derived from ferrichrome A is rapidly distributed, with a major fraction found in the mitochondria, presumably as heme.
The kinetics of ferrichrome and ferrichrome A uptake have also been investigated. The Km of transport of ferrichrome was …
Iron And Zinc Deficiencies In Selected Calcareous Soils Of Southern Utah, E. Frank Schnitzer
Iron And Zinc Deficiencies In Selected Calcareous Soils Of Southern Utah, E. Frank Schnitzer
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The response of field corn to iron and zinc fertilization was studied using a split plot experimental design in Millard County, Utah, in cooperation with the Utah State University Extension Agent and a local farmer. mainplot treatment applications consisted, on an acre basis, of (1) 5 tons of sulfuric acid, (2) 1 ton sulfuric acid, (3) 1.8 tons gypsum, (4) check plot. Subplot treatments were (1) Fe at 5 lbs/Ac, (2) Zn at 10 lbs/Ac, (3) Fe and Zn at 5 and 10 lb / Ac, respectively, (4) check plot. The iron and zinc applications were essentially rendered unavailable by …
The Iron Bioavailability Of Mechanically-Deboned Meats, Bonnie Rae Anderson Farmer
The Iron Bioavailability Of Mechanically-Deboned Meats, Bonnie Rae Anderson Farmer
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Two separate experiments were used to investigate iron bioavailability of mechanically-deboned meats using hemoglobin regeneration to measure iron utilization. In both studies, male weanling rats were made anemic by bleeding and being fed a low-iron diet. Experimental diets were control fed to the animals and final hemoglobin concentrations were recorded. Animals were sacrificed and liver iron concentrations determined. The first experiment measured the iron bioavailability of mechanically-deboned and hand-deboned beef plate was better utilized by rats than the iron from mechanically- deboned shank and mechanically-deboned plate. The effect of lipid source and level on iron bioavailability of mechanically-deboned turkey meat …
The Relationship Of Molybdenum To Iron Status In Pregnancy And Anemia In Rats And Humans, Jo Ann Mortensen
The Relationship Of Molybdenum To Iron Status In Pregnancy And Anemia In Rats And Humans, Jo Ann Mortensen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Weanling male rats were made anemic and fed diets supplemented with 20 ppm iron and/or 2 ppm molybdenum. A decrease in serum iron was observed in the rats supplemented only with iron and a significant decrease in hemoglobin was observed in rats given no supplementation.
In a second experiment, pregnant female rats were also fed diets supplemented with 20 ppm iron and/or 2 ppm molybdenum. An inverse relationship was apparent between iron and copper in both the serum and the liver of the female rats. The livers of their pups displayed an inverse relationship between molybdenum and copper. Hemoglobin in …
Some Effects Of Mechanical Deboning On The Composition And The Bioavailability Of Protein And Iron In Turkey Frame Meat, Lowell C. Allred
Some Effects Of Mechanical Deboning On The Composition And The Bioavailability Of Protein And Iron In Turkey Frame Meat, Lowell C. Allred
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Meat was obtained from a single daily lot of turkey frames by mechanically deboning with a Beehive AU 4171 deboner and by hand deboning. The meat was analyzed for protein, fat, moisture, ash, iron, calcium, and 19 amino acids. Mechanically deboned turkey had 68 percent more ash, 74 percent more iron, and nine times more calcium than the hand deboned turkey meat. Other constituents were about equal in the two products. Protein bioavailability tests, including protein efficiency ratio, biological value, net protein utilization, and nitrogen efficiency for growth, did not reveal significant differences between mechanically deboned and hand deboned turkey. …
Effects Of X-Ray Induced Achlorhdria On The Utilization Of Dietary Calcium And Iron From Different Salts By Rats, Reid Scott Holbrook
Effects Of X-Ray Induced Achlorhdria On The Utilization Of Dietary Calcium And Iron From Different Salts By Rats, Reid Scott Holbrook
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Dietary calcium has been classified as one of the minerals frequently limiting in the American diet (FAO, 1962) . Bone demineralization has been observed as a result of calcium deficient diets (Salomon et al., 1972), partial gastrectomies (Eddy, 1971) and inadequate hormonal balance (Albright et al., 1948). Although bone demineralization, or osteoporosis, has been attributed to many factors, the interrelationship of gastric acidity and the utilization of dietary calcium may be a key to the etiology of osteoporosis.
Eighty weanling male albino rats were divided into eight groups. All animals had their stomachs exposed through a mid-line incision. Control rats …
Effects Of Zinc Deficiency On Hemoglobin, Red Cell Counts, Red Cell Fragility And Circulating And Storage Levels Of Zinc, Iron And Copper In The Rat, Rekha R. Dalvi
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Three experiments were conducted to study the effect of zinc deficiency on hemoglobin, red cell counts, red cell fragility, storage of erythropoietic minerals in livers and circulating levels of zinc, iron and copper in the rat.
In the experiment 1, twenty weanling rats were divided into four groups. Two groups were fed zinc-deficient diet ( <0.5 ppm); and two groups, zinc-supplemented diet (50 ppm). The rats in the first and third groups were bled three times a week (bled), however the rats in remaining groups were bled once a week (non-bled). All rats received ad libitum food.
Mean food intake per day was considerably less for zinc-deficient rats than that for zinc-supplemented rats. Approximately 2 to 3 times as much food was required for each gram of body weight gained by the zinc-deficient group as by the controls.
In the experiment 2, …
0.5>Methods Of Correcting Iron And Zinc Deficiencies In Peach Trees, Earl Seeley
Methods Of Correcting Iron And Zinc Deficiencies In Peach Trees, Earl Seeley
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Studies were conducted to determine the effects of iron and zinc chelates on these deficiencies. Soil treatments, and foliar treatments with and without urea were used. It was found that in soil treatments at least one pound chelate per tree must be used to significantly increase the iron content of the leaves. The soil treatments did not result in as high a concentration in the leaves early in the season, but they had a residual effect that lasted throughout the entire growing season. Foliar treatments with iron did not effect the foliage that developed after the final application was made. …
A Study Of The Off-Farm Agriculture Occupations Of Millard, Beaver, Iron, And Washington Counties In Utah, To Determine Educational Needs, Thales C. Brown
A Study Of The Off-Farm Agriculture Occupations Of Millard, Beaver, Iron, And Washington Counties In Utah, To Determine Educational Needs, Thales C. Brown
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The objectives of this study were to gather information concerning the off-farm agricultural occupations of Millard, Beaver, Iron and Washington Counties.
A list was made of present and anticipated number of employees in these occupations with the numbers involved in full-time, part-time, and female work.
Occupations with similar backgrounds were clustered into four main areas. These were further classified into individual jobs.
Comments were made concerning the competencies needed for entry and satisfactory performance in these occupations.
Some of the characteristics of these occupations as to salary, required experience, labor laws and education requirements were reported.
An attempt was made …