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Articles 61 - 76 of 76
Full-Text Articles in Medicine and Health Sciences
Placental Expression Of Estrogen Receptor Beta And Its Hormone Binding Variant – Comparison With Estrogen Receptor Alpha And A Role For Estrogen Receptors In Asymmetric Division And Differentiation Of Estrogen-Dependent Cells, Antonin Bukovsky, Michael R. Caudle, Maria Cekanova Ms, Rndr, Phd, Romaine I. Fernando, Jay Wimalasena, James S. Foster, Donald C. Henley, Robert F. Elder
Placental Expression Of Estrogen Receptor Beta And Its Hormone Binding Variant – Comparison With Estrogen Receptor Alpha And A Role For Estrogen Receptors In Asymmetric Division And Differentiation Of Estrogen-Dependent Cells, Antonin Bukovsky, Michael R. Caudle, Maria Cekanova Ms, Rndr, Phd, Romaine I. Fernando, Jay Wimalasena, James S. Foster, Donald C. Henley, Robert F. Elder
Faculty Publications and Other Works -- Biochemistry, Cellular and Molecular Biology
During human pregnancy, the production of 17-beta-estradiol (E2) rises steadily to eighty fold at term, and placenta has been found to specifically bind estrogens. We have recently demonstrated the expression of estrogen receptor alpha (ER-alpha) protein in human placenta and its localization in villous cytotrophoblast (CT), vascular pericytes, and amniotic fibroblasts. In vitro, E2 stimulated development of large syncytiotrophoblast (ST) aggregates. In the present study we utilized ER-beta affinity purified polyclonal (N19:sc6820) and ER-alpha monoclonal (clone h-151) antibodies. Western blot analysis revealed a single ~52 kDa ER-beta band in chorionic villi (CV) protein extracts. In CV, strong cytoplasmic ER-beta immunoreactivity …
Isolation And Investigation Of The Exopolysaccharide From Thauera Sp. Mz1t, Michael S. Allen
Isolation And Investigation Of The Exopolysaccharide From Thauera Sp. Mz1t, Michael S. Allen
Doctoral Dissertations
Thauera sp. strain MZ1T is a floc-forming bacterium isolated from the wastewater treatment plant of Eastman Chemical Company. Its overabundance in that system in the form of zoogloeal clusters was positively correlated to episodes of poor dewatering of activated sludge (Lajoie 2000). The specific cause of this problem was thought to be due to the production of large quantities of hydrophilic exopolysaccharide (EPS) by MZ1T, which entraps water in the form of a hydrated gel, and results in a sludge that is resistant to mechanical dewatering.
A method for the reproducible extraction of EPS from pure cultures of MZ1T was …
Short Communication: Relationship Between Body Growth And Mammary Development In Dairy Heifers, L F. Silva, M J. Vandehaar, Brian K. Whitlock, R P. Radcliff, H A. Tucker
Short Communication: Relationship Between Body Growth And Mammary Development In Dairy Heifers, L F. Silva, M J. Vandehaar, Brian K. Whitlock, R P. Radcliff, H A. Tucker
Faculty Publications and Other Works -- Large Animal Clinical Sciences
Our objective was to determine if prepubertal rate of body weight (BW) gain, independent of diet, was related to mammary development of dairy heifers. Data from two studies recently conducted at Michigan State University were used to identify factors, within a dietary treatment group, that would account for variation in first lactation milk production or amount of mammary parenchymal DNA at the time of puberty. Factors analyzed for variation in milk production during first lactation were: postpartum BW, prepubertal BW gain, gestational BW gain, postpartum BW gain, body condition score (BCS) at breeding, and BCS at calving. Factors analyzed for …
Effect Of Dietary Protein On Prepubertal Mammary Development In Rapidly Growing Dairy Heifers, Brian K. Whitlock, M J. Vandehaar, L F. Silva, H A. Tucker
Effect Of Dietary Protein On Prepubertal Mammary Development In Rapidly Growing Dairy Heifers, Brian K. Whitlock, M J. Vandehaar, L F. Silva, H A. Tucker
Faculty Publications and Other Works -- Large Animal Clinical Sciences
The objective was to determine whether increased dietary protein would enhance mammary development in prepubertal heifers fed for rapid body growth (1.2 kg/d). Fifty-four Holstein heifers (weighing approximately 134 kg) were assigned to one of three treatments. Heifers were fed a total mixed ration with metabolizable energy at 2.85 Mcal/kg and metabolizable protein at low, standard, or high concentrations (37, 41, or 44 g/Mcal of metabolizable energy, respectively) from 3.5 mo of age until slaughter at approximately 46 d after puberty. Heifers fed low, standard, and high protein gained 1130, 1170, and 1180 g/d, respectively. Dietary protein did not affect …
Analysis Of Aneuploidy During Mouse Spermatogenesis, April D. Pyle
Analysis Of Aneuploidy During Mouse Spermatogenesis, April D. Pyle
Doctoral Dissertations
Successful transition through meiosis is required for production of chromosomally-balanced gametes. When chromosome segregation goes awry during meiosis, aneuploidy can occur. Unfortunately, the mechanisms behind this nondisjunction are not well understood. Therefore, this dissertation has focused on learning more about the causative factors associated with aneuploidy during spermatogenesis. Are there factors that are always associated with leading to production of aneuploid sperm? One of the main goals of this dissertation is to find mouse models to study what factors may be involved in chromosome malsegregation; such as pairing, recombination, and transition through the division phases of meiosis.
The first part …
Aquaporins And Aquaglyceroporins Of Legume Nodules: Structure, Function, And Regulation, James F. Guenther
Aquaporins And Aquaglyceroporins Of Legume Nodules: Structure, Function, And Regulation, James F. Guenther
Doctoral Dissertations
By isolating RNA from mature nodules of the legume Lotus japonicas and employing an RT-PCR approach, two new cDNAs were characterized whose open reading frames code for members of the MIP (Major Intrinsic Protein) family of membrane proteins. These two genes products were termed (Lotus Intrinsic Membrane Protein 1 and 2) LIMP1 and LIMP2. Both LIMP1 and LIMP2 display all the hallmarks of the MIP protein family including, six putative transmembrane domains based on hydropathy plots, and the invariant NPA (asparagine-proline-alanine) signature motifs located symmetrically on two loops, which connect transmembrane helix 3-4 and transmembrane helix 5-6. Based on sequence …
Bordetella Bronchiseptica: A Candidate Mucosal Vaccine Vector, Sreekumari Rajeev
Bordetella Bronchiseptica: A Candidate Mucosal Vaccine Vector, Sreekumari Rajeev
Doctoral Dissertations
Bordetella bronchiseptica colonizes the upper respiratory tract of a wide variety of mammals and is involved in diseases such as kennel cough in dogs, atrophic rhinitis in pigs and upper respiratory tract infections of laboratory animals. Studies were focused on developing a heterologous antigen expression system in B. bronchiseptica and to evaluate the potential of this organism as a candidate mucosal vaccine vector. Since the role of Bordetella bronchiseptica and Pasteurella multocida toxin (PMT) in the disease atrophic rhinitis of pigs was well documented, this research was focused in the possibility of developing a refined vaccine to control this disease. …
Variability Of Placental Expression Of Cyclin E Low Molecular Weight Variants, A Bukovsky, Maria Cekanova Ms, Rndr, Phd, Mr Caudle, J Wimalasena, Js Foster, Ja Keenan, Rf Elder
Variability Of Placental Expression Of Cyclin E Low Molecular Weight Variants, A Bukovsky, Maria Cekanova Ms, Rndr, Phd, Mr Caudle, J Wimalasena, Js Foster, Ja Keenan, Rf Elder
Faculty Publications and Other Works -- Biochemistry, Cellular and Molecular Biology
No abstract provided.
Adaptive Functions Of The Corpus Striatum: The Past And Future Of The R-Complex, Neil Greenberg
Adaptive Functions Of The Corpus Striatum: The Past And Future Of The R-Complex, Neil Greenberg
Faculty Publications and Other Works -- Ecology and Evolutionary Biology
The basal ganglia is emerging from the shadow cast by the most conspicuous clinical expression of its dysfunction: motor disorders.What is revealed is the nexus of a widely distributed system which functions in integrating action with cognition, motivation, and affect. Prominent among non-motor functions are striatal involvement in building up of sequences of behavior into meaningful, goal-directed patterns and repertoires and the selection of appropriate learned or innate sequences in concert with their possible predictive control. Further, striatum seems involved in declarative and strategic memory (involving intentional recollection and the management of retrieved memories, respectively). Findings from reptile experiments indicate …
Ethological Aspects Of Stress In A Model Lizard, Anolis Carolinensis, Neil Greenberg
Ethological Aspects Of Stress In A Model Lizard, Anolis Carolinensis, Neil Greenberg
Faculty Publications and Other Works -- Ecology and Evolutionary Biology
Research on the stress response in reptiles can provide a useful comparative perspective for understanding how the constituent elements of the response can be put into service of diverse behavioral adaptations. A summary of the neural and endocrine causes and consequences of specific behavioral patterns seen in the small diurnal lizard, Anolis carolinensis, has provided a model for the exploration of the dynamics of autonomic and neurohormonal contributions to adaptive behavior.
In this species, changes in body color provide indices of the flux of circulating stress relevant hormones, and are seen in situations from spontaneous exploration through agonistic behavior. Furthermore, …
Detection Of Biomarkers Of Potential Pathogens In Varied Matrices, Carol Ann Smith
Detection Of Biomarkers Of Potential Pathogens In Varied Matrices, Carol Ann Smith
Masters Theses
Methods that use signature biomarkers have become increasingly important in the field of environmental microbiology. Signature lipid biomarker (SLB) analysis is a method of analysis for the quantitative definition of viable biomass, community composition, and nutritional status of microbiota isolated from a wide variety of environmental matrices, including air, soil and water. Biomarkers examined in this thesis were glyco- and phospholipids, and dipicolinic acid. Organisms tested were Cryptosporidium parvum, C. baileyi, C. muris, Eimeria tenella, E. acervulina, E. maxima, Escherichia coli, and Bacillus subtilis.
Three species of Cryptosporidium were examined using signature lipid biomarker analysis. This analysis was successfully …
The Saurian Psyche Revisted: Lizards In Research, Neil Greenberg
The Saurian Psyche Revisted: Lizards In Research, Neil Greenberg
Faculty Publications and Other Works -- Ecology and Evolutionary Biology
This essay is intended to guide researchers interested in lizards as prospective experimental models to identify an appropriate species for their research needs and to care for lizards in a manner that will not compromise their utility. Coupled with these is a concern for critical thinking about the ethical dimension of lizard research, one guide for which is to consider the intersection of human needs and lizard needs.
Before proceeding further, several arbitrary premises must be made clear:
1. While wholly deserving of study because of their intrinsic interest, I will assume that the lizard research to be undertaken is …
Art, Science, Areté, Neil Greenberg
Art, Science, Areté, Neil Greenberg
Faculty Publications and Other Works -- Ecology and Evolutionary Biology
No abstract provided.
Ethological Considerations In The Experimental Study Of Lizard Behavior, Neil Greenberg
Ethological Considerations In The Experimental Study Of Lizard Behavior, Neil Greenberg
Faculty Publications and Other Works -- Ecology and Evolutionary Biology
The importance of an ethological approach to the experimental study of an unfamiliar species is described and several of its problems discussed. The selection of units of behavior is a crucial first step in the development of a behavior inventory. The correlation of a behavioral unit with a particular context is necessary to ascribe function to that to that unit and to develop an ethogram. Methods of studying lizards under controlled conditions are described and discussed. Constraints on behavior that must be considered in an experimental study include the microclimate and its thermal qualities, food and water, shelter utilization, and …
X-Ray-Induced Specific-Locus Mutation Rates In Newborn And Young Mice, Paul Bruce Selby
X-Ray-Induced Specific-Locus Mutation Rates In Newborn And Young Mice, Paul Bruce Selby
Doctoral Dissertations
The specific-locus mutation frequency resulting from 300 R of acute X irradiation has been determined for the germ cells present in male mice at 0, 2, 4, 6, 8, 10, 14, 21, 28, and 35 days of age and also for female mice at 0 days of age, Sample size was much larger for the males irradiated on day 0 than for other age groups but in all groups it was large enough to insure that an extremely high rate would be noticed. At 35 days of age the testis is histologically similar to that of the adult. It was …
Some Reactions Of Phenothiazine And Certain Benzophenothiazines, John Charles Gilmer
Some Reactions Of Phenothiazine And Certain Benzophenothiazines, John Charles Gilmer
Doctoral Dissertations
Summary
The consideration of the medical importance of phenothiazine derivatives and the known cancer chemotherapeutic value of the nitrogen mustards made the synthesis of some nitrogen mustard derivatives of the phenothiazines of particular interest. In the course of this research the N-{2-[bis-(2-chloroethyl)amino]ethyl} derivatives of phenothiazine, 7H-benzo[c]phenothiazine, 7H-dibenzo[c, h] phenothiazine, and 14H-dibenzo[a, h] phenothiazine were synthesized for anticancer evaluation. Also submitted to the Cancer Chemotherapy National Service Center for testing were the N-(2-chloroethyl) monofunctional nitrogen mustard derivatives of the first three phenothiazines mentioned above.