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Articles 31891 - 31920 of 34144
Full-Text Articles in Entire DC Network
Effects Of Zinc Deficiency On Sertoli Cell Number And Ultrastructure: An In Vivo And In Vitro Study., Gro Thorne-Tjomsland
Effects Of Zinc Deficiency On Sertoli Cell Number And Ultrastructure: An In Vivo And In Vitro Study., Gro Thorne-Tjomsland
Theses and Dissertations
Hypogonadism in the male is a well known clinical symptom of zinc deficiency. The testicular lesions have been primarily attributed to the effects of decreased zinc on germ cells. This study assessed possible effects of zinc deficiency on Sertoli cell number and ultrastructure.Long-Evans dams and their newborn litters were placed on zinc deficient (ZD), pair-fed or ad libitum fed (AL) diets. All dams received a 20% egg white based diet containing less than one ppm zinc. ZD dams received distilled, deionized water (<1 ppm ZN), while PF and AL dams received the above water fortified with 25 ppm zinc. Male pups were sacrificed day 10 and their testes were processed for light (LM) and transmission electron microscopy (TEM).LM cell counts were performed on one (mu)m sections. Average number of germ cells on the basement membrane (BM) (=GC2) per tubular cross-section was reducted by two-thirds in ZD and PF compared to AL animals (p < 0.0001). Average number of germ cells not on the BM (=GC1) and average number of Sertoli cells per tubular cross-section were not statistically different in the three diet groups.Volume fractions of TEM subcompartments/total cytoplasm were determined by morphometric methods. The lysosome-like fraction was doubled in ZD and PF compared to AL animals (p < 0.05). Endoplasmic reticulum, Golgi and mitochondrial fractions were not statistically different in the three diet groups.Five day old Sertoli cell cultures derived from ZD, PF and AL pups were volumetrically analyzed as in vivo. The endoplasmic reticulum fraction was approximately 100% lower in ZD- than in AL-derived cultures (p < 0.01). Golgi, mitochondrial, dense body and inclusion body fractions were similar in ZD-, PF- and AL-derived cultures.These data suggest that Sertoli cells, although not significantly reduced in number in ZD and PF animals, were affected ultrastructurally by dietary treatment. The volumetric increase in lysosome-like bodies in vivo suggested that Sertoli cells participate in phagocytosis of germ cells degenerating as a result of dietary treatment. The decreased ER volume fraction of ZD-derived tissue cultured Sertoli cells suggested that Sertoli cell secretory potential may be altered as a result of zinc deficiency.
Type-Token Ratios And Language Sample Sizes For School Age Children, Holly Teresa Haug
Type-Token Ratios And Language Sample Sizes For School Age Children, Holly Teresa Haug
Theses and Dissertations
No abstract provided.
Comptroller Personnel Input To The Design Of Computer Security Systems, Larry Edward Trower
Comptroller Personnel Input To The Design Of Computer Security Systems, Larry Edward Trower
Theses and Dissertations
No abstract provided.
Depositional History And Diagenesis Of The Upper Mission Canyon And Lower Charles Formations (Mississippian), Billings County, North Dakota, Randall A. Stephens
Depositional History And Diagenesis Of The Upper Mission Canyon And Lower Charles Formations (Mississippian), Billings County, North Dakota, Randall A. Stephens
Theses and Dissertations
The upper Mission Canyon and lower Charles Formations of the Madison Group (Mississippian) in central Billings County, North Dakota respectively consist of interbedded limestones and dolostones, and anhydrite. Study of these rocks was limited to Big Stick and T.R. Fields, located on the Billings Anticline, central Williston Basin.
Detailed examinations of cores from a 166 ft (51 m) section within the upper Mission Canyon and lower Charles Formations resulted in the identification of seven lithotypes: echinoderm wackestone-packstone, dolomudstone, dolomitic echinoderm wackestone, grainstone, skeletalpeloidal carbonate, laminated carbonate, and anhydrite. The stratigraphic distribution of lithotypes is consistent throughout the study area.
Deposition …
Deflation Basin Stratigraphy: Southwestern North Dakota, Robert E. Seidel
Deflation Basin Stratigraphy: Southwestern North Dakota, Robert E. Seidel
Theses and Dissertations
The goal of this study was the determination of a similar depositional sequence for sediments from a number of shallow basins in southwestern North Dakota and the comparison of this sequence with other work either in the area or in similar geographic environments.
Samples were obtained by augering, coring, and trenching selected basins. They were analyzed by means of: core description; detailed texture analyses on selected cores by sieve, pipette, and SediGraph techniques; and mineralogy by x-ray diffraction. Computer analyses were used to characterize grain-size distributions and to correlate texture and mineralogy by cross-association.
The results of the study verified …
Length-Based Word Choosing Behaviors Of Persons Who Stutter When Formulating Speech, Barbara Macdonald Cameron
Length-Based Word Choosing Behaviors Of Persons Who Stutter When Formulating Speech, Barbara Macdonald Cameron
Theses and Dissertations
No abstract provided.
An Analysis Of Metaphor In Hume's Dialogues, Gary Norris Albrightson
An Analysis Of Metaphor In Hume's Dialogues, Gary Norris Albrightson
Theses and Dissertations
No abstract provided.
Syntactic Language Performance Of Bilingual English/Punjabi-Speaking Children In Comparison To Monolingual English-Speaking Children In The Manitoba School Systems, Minny Dilpreet Deol
Syntactic Language Performance Of Bilingual English/Punjabi-Speaking Children In Comparison To Monolingual English-Speaking Children In The Manitoba School Systems, Minny Dilpreet Deol
Theses and Dissertations
No abstract provided.
The Conceptual Levels Of The American Voter In The 1980 Presidential Election, Debora B. Conner
The Conceptual Levels Of The American Voter In The 1980 Presidential Election, Debora B. Conner
Theses and Dissertations
No abstract provided.
Nursing Care Behaviors That Predict Patient Satisfaction, Marilyn M. Miller Bader
Nursing Care Behaviors That Predict Patient Satisfaction, Marilyn M. Miller Bader
Theses and Dissertations
No abstract provided.
Increased Awareness Through Marketing Of Speech-Language Pathology And Audiology And The University Of North Dakota Speech, Language And Hearing Clinic, Mark Lawrence Robertson
Increased Awareness Through Marketing Of Speech-Language Pathology And Audiology And The University Of North Dakota Speech, Language And Hearing Clinic, Mark Lawrence Robertson
Theses and Dissertations
No abstract provided.
Family Needs Of Coronary Artery Bypass Graft Patients During The Operative Period, Connie M. Norheim
Family Needs Of Coronary Artery Bypass Graft Patients During The Operative Period, Connie M. Norheim
Theses and Dissertations
No abstract provided.
Entrance And Exit Criteria For Preschool Special Education Programs In Nine States, Gail M. Owan
Entrance And Exit Criteria For Preschool Special Education Programs In Nine States, Gail M. Owan
Theses and Dissertations
No abstract provided.
The Rank Order, By Frequency Of Occurrence, Of Words Used Two Or More Times By Normal Speaking Adults While Formulating Monologue, Kimberly K. Lindell
The Rank Order, By Frequency Of Occurrence, Of Words Used Two Or More Times By Normal Speaking Adults While Formulating Monologue, Kimberly K. Lindell
Theses and Dissertations
No abstract provided.
The Male Nurse In North Dakota : A Profile, Sharon Nelson
The Male Nurse In North Dakota : A Profile, Sharon Nelson
Theses and Dissertations
No abstract provided.
Some Grammatical Characteristics Of The Word-Choosing Behaviors Of Stutterers, Darlene J. Nash
Some Grammatical Characteristics Of The Word-Choosing Behaviors Of Stutterers, Darlene J. Nash
Theses and Dissertations
No abstract provided.
The Semantics Of Epiphany : James Joyce's The Dead, Carol Lea Ippoliti
The Semantics Of Epiphany : James Joyce's The Dead, Carol Lea Ippoliti
Theses and Dissertations
No abstract provided.
Reading Ability In Eight School-Aged Children Who Experienced Oral Phonological Deficits In Preschool Years : A Descriptive Analysis, Patricia Maureen Doyle
Reading Ability In Eight School-Aged Children Who Experienced Oral Phonological Deficits In Preschool Years : A Descriptive Analysis, Patricia Maureen Doyle
Theses and Dissertations
No abstract provided.
Reactions Of Junior High Students To Speech Disorders, Marika Hynalka Harsanyi
Reactions Of Junior High Students To Speech Disorders, Marika Hynalka Harsanyi
Theses and Dissertations
No abstract provided.
Eye Contact In Autistic-Like Children, Cheryl Lynne Gardner
Eye Contact In Autistic-Like Children, Cheryl Lynne Gardner
Theses and Dissertations
No abstract provided.
A Burkeian Analysis Of Ronald Reagan's Rhetoric In The 1984 Presidential Debates, Keith D. Green
A Burkeian Analysis Of Ronald Reagan's Rhetoric In The 1984 Presidential Debates, Keith D. Green
Theses and Dissertations
No abstract provided.
Effects Of Health Care Contracting With Surgical Inpatients On Patient Compliance, Kay A. Keimig
Effects Of Health Care Contracting With Surgical Inpatients On Patient Compliance, Kay A. Keimig
Theses and Dissertations
No abstract provided.
An Analysis Of Literature Centering On Classroom Communication In Higher Education To Determine The Types Of Studies Done Within The Last Twenty Years, Karen Louise Jorde
An Analysis Of Literature Centering On Classroom Communication In Higher Education To Determine The Types Of Studies Done Within The Last Twenty Years, Karen Louise Jorde
Theses and Dissertations
No abstract provided.
Into The Fourth Dimension, Ward K. Johnson
Into The Fourth Dimension, Ward K. Johnson
Theses and Dissertations
No abstract provided.
Arginine Vasopressin Reactivates Memory After Hypothermia Induced Amnesia Only When Animals Are Pretrained To The Apparatus, Timothy P. Tinius
Arginine Vasopressin Reactivates Memory After Hypothermia Induced Amnesia Only When Animals Are Pretrained To The Apparatus, Timothy P. Tinius
Theses and Dissertations
No abstract provided.
A Historical Study Of Dispute Resolution Mechanisms In North Dakota, Paul A. Temanson
A Historical Study Of Dispute Resolution Mechanisms In North Dakota, Paul A. Temanson
Theses and Dissertations
No abstract provided.
What Can I Say But : Adrienne Rich's The Stranger And Linguistic Analysis, Kristin Ruth Sorenson
What Can I Say But : Adrienne Rich's The Stranger And Linguistic Analysis, Kristin Ruth Sorenson
Theses and Dissertations
No abstract provided.
Perceptions Of The Need For Communication In Nursing Homes, Kathryn Scheving
Perceptions Of The Need For Communication In Nursing Homes, Kathryn Scheving
Theses and Dissertations
No abstract provided.
The Elasticity Of Demand For Natural Gas : A Regulatory Approach, Mark A. Ruelle
The Elasticity Of Demand For Natural Gas : A Regulatory Approach, Mark A. Ruelle
Theses and Dissertations
No abstract provided.
A Comparison Of The Frequency Ranks Of Words Chosen By Persons Who Stutter With The Word Choosing Behavior Of Nonstutterers, Norma J. Williams
A Comparison Of The Frequency Ranks Of Words Chosen By Persons Who Stutter With The Word Choosing Behavior Of Nonstutterers, Norma J. Williams
Theses and Dissertations
No abstract provided.