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Articles 1 - 30 of 80
Full-Text Articles in Life Sciences
Daughter Cells Of Saccharomyces Cerevisiae From Old Mothers Display A Reduced Life Span, Nicanor Austriaco, Brian K. Kennedy, Leonard Guarente
Daughter Cells Of Saccharomyces Cerevisiae From Old Mothers Display A Reduced Life Span, Nicanor Austriaco, Brian K. Kennedy, Leonard Guarente
Biology Faculty Publications
The yeast Saccharomyces cerevisiae typically divides asymmetrically to give a large mother cell and a smaller daughter cell. As mother cells become old, they enlarge and produce daughter cells that are larger than daughters derived from young mother cells. We found that occasional daughter cells were indistinguishable in size from their mothers, giving rise to a symmetric division. The frequency of symmetric divisions became greater as mother cells aged and reached a maximum occurrence of 30% in mothers undergoing their last cell division. Symmetric divisions occurred similarly in rad9 and ste12 mutants. Strikingly, daughters from old mothers, whether they arose …
Microcirculation: Electrophysiological Basis For The Response Of Endothelial Cells To Inflammatory Mediators-Bradykinin, Kai Miao
Electronic Theses and Dissertations
Using conventional microelectrodes, I studied the electrical basis for determining the resting V$\sb{\rm m}$ in intact EC's from hamsters. The resting V$\sb{\rm m}$ were found to be $-$40 mV for aortic EC's and $-$43 mV for vena caval EC's. The contributions of ions to the resting V$\sb{\rm m}$ of aortic EC's were compared in terms of the transference number (t$\sb{\rm ion}$). To develop a technique for in situ monitoring changes in V$\sb{\rm m}$ of postcapillary venular EC's in the hamster mesentery, a voltage-sensitive fluorescent probe, bisoxonol, was used to load the cells and the fluorescence signals were analyzed under an …
Ua66/14/4 Kentucky Partnership Newsletter, Vol. Ii, No. 6, Kentucky Partnership For Farm Family Health & Safety
Ua66/14/4 Kentucky Partnership Newsletter, Vol. Ii, No. 6, Kentucky Partnership For Farm Family Health & Safety
University Organizations
Newsletter created by and about the Kentucky Partnership for Farm Family Health & Safety.
Transcriptional Regulation Of Insulin-Like Growth Factor : Binding Protein-4 By Protein Kinase A And Protein Kinase C Signal Transduction Pathways In Human Bone Cells, Kuk-Wha Lee
Loma Linda University Electronic Theses, Dissertations & Projects
The Insulin-like Growth Factor (IGF) system is an important local regulator of osteoblast proliferation, the primary determinant of bone formation. Six IGF Binding Proteins (IGFBPs) either inhibit or enhance IGF actions. Previous studies have shown that IGFBP-4 is an important negative regulator of osteoblast cell proliferation and that agents such as PTH which increase intracellular cAMP significantly increase expression of IGFBP-4 at the protein and mRNA levels. The underlying molecular mechanism which accounted for IGFBP-4 expression had not been determined and was the focus of my dissertation. Agents which increase intracellular cAMP rapidly increased IGFBP-4 mRNA levels. Nuclear run-off experiments …
1994 Scholars And Artists Bibliography, Michael Schwartz Library, Cleveland State University, Friends Of The Michael Schwartz Library
1994 Scholars And Artists Bibliography, Michael Schwartz Library, Cleveland State University, Friends Of The Michael Schwartz Library
Scholars and Artists Bibliographies
This bibliography was created for the annual Friends of the Michael Schwartz Library Scholars and Artists Reception, recognizing scholarly and creative achievements of Cleveland State University faculty, staff and emeriti
Ua66/14/4 Kentucky Partnership Newsletter, Vol. Ii, No. 5, Kentucky Partnership For Farm Family Health & Safety
Ua66/14/4 Kentucky Partnership Newsletter, Vol. Ii, No. 5, Kentucky Partnership For Farm Family Health & Safety
University Organizations
Newsletter created by and about the Kentucky Partnership for Farm Family Health & Safety.
Santa Clara Magazine, Volume 36 Number 4, Fall 1994, Santa Clara University
Santa Clara Magazine, Volume 36 Number 4, Fall 1994, Santa Clara University
Santa Clara Magazine
6 - THE MIND THIEF November is national Alzheimer's Disease Month, drawing attention to an illness that robs patients of their memories, their competence, sometimes their very personalities. By Maureen McInaney '85
12 - CREDIBILITY MAKES A DIFFERENCE A look at a key element of leadership: building trust. By James M. Kouzes and Barry Z. Posner
18 - PUTTING THE PIECES TOGETHER SCU's $125 million Challenge Campaign is transforming the University.
24 - NO PROBLEMO A racked-up knee, a forfeited football scholarship, an extra 50 pounds-no problemo. A work of short fiction. By Jan Maulhardt '90
28 - THE NUCLEAR …
Review Of: The Genetic Frontier: Ethics, Law, And Policy (Mark S. Frankel & Albert Teich Eds., American Association For The Advancement Of Science 1994), Suzanne A. Sprunger
Review Of: The Genetic Frontier: Ethics, Law, And Policy (Mark S. Frankel & Albert Teich Eds., American Association For The Advancement Of Science 1994), Suzanne A. Sprunger
RISK: Health, Safety & Environment (1990-2002)
Review of: The Genetic Frontier: Ethics, Law, and Policy (Mark S. Frankel & Albert Teich eds., American Association for the Advancement of Science 1994). Acknowledgments, appendix, contributors, figures, index, introduction, notes, references, tables. LC 93-37230, ISBN 0-87168-526-4. [260 pp. Paper $22.95. 1333 H St., NW, Washington DC 20005.]
Effects Of Natural Sequence Variation On Recognition By Monoclonal Antibodies Neutralize Simian Immunodeficiency Virus Infectivity, Weon Sang Choi, Catherine Collignon, Clotilde Thiriart, Dawn P. Wooley, E. J. Scott, Karen A. Kent, Ronald C. Desrosiers
Effects Of Natural Sequence Variation On Recognition By Monoclonal Antibodies Neutralize Simian Immunodeficiency Virus Infectivity, Weon Sang Choi, Catherine Collignon, Clotilde Thiriart, Dawn P. Wooley, E. J. Scott, Karen A. Kent, Ronald C. Desrosiers
Neuroscience, Cell Biology & Physiology Faculty Publications
The determinants of immune recognition by five monoclonal antibodies (KK5, KK9, KK17, Senv7.1, and Senv101.1) that neutralize simian immunodeficiency virus infectivity were analyzed. These five neutralizing monoclonal antibodies were generated to native SIVmac251 envelope glycoprotein expressed by a vaccinia virus recombinant vector. All five recognize conformational or discontinuous epitopes and require native antigen for optimal recognition. These monoclonal antibodies also recognize SIVmac239 gp120, but they do not recognize gp120 of two natural variants of SIVmac239, 1-12 and 8-22, which evolved during the course of persistent infection in vivo (D.P.W. Burns and R.C. Desrosiers, J. Virol. 65:1843-1854, 1991). Recombinant viruses which …
A Comparative Pharmacokinetic Study Of The Role Of Gender And Developmental Differences In Occupational And Environmental Exposure To Benzene, Elizabeth A. Brown
A Comparative Pharmacokinetic Study Of The Role Of Gender And Developmental Differences In Occupational And Environmental Exposure To Benzene, Elizabeth A. Brown
Theses and Dissertations
The purpose of this study is two-fold. First, it shows that physiological differences between men and women result in gender-specific exposures with respect to benzene. Second, it assesses the potential for a lactating woman's occupational and personal benzene exposure to impact a nursing infant's exposure, highlighting the possibility of subjecting an infant to the effects of industrial chemicals via breast feeding. This study employs physiologically based pharmacokinetic (PBPK) modeling to investigate the influence of physiological parameters and to evaluate the ability of inhaled benzene to transfer from mother to infant through breastmilk. The models are run through scenarios that simulate …
A Retrospective Quantitative Assessment Of Trichloroethylene Exposure Of Workers At Aircraft Maintenance Facilities At Hill Air Force Base Through The Use Of Modeling, Anthony O. Copeland
A Retrospective Quantitative Assessment Of Trichloroethylene Exposure Of Workers At Aircraft Maintenance Facilities At Hill Air Force Base Through The Use Of Modeling, Anthony O. Copeland
Theses and Dissertations
Monte Carlo simulation and source-receptor modeling are used to estimate the TCE exposures encountered by select workers at aircraft maintenance facilities at Hill Air Force Base between 1955 and 1979. An epidemiological study of this group, a retrospective cohort study of 14,457 workers who were employed at the base for a minimum of one year between 1952 and 1956, was headed by Dr. R. Spirtas of the National Cancer Institute to evaluate mortality associated with occupational exposure. One of the major conclusions of the study was that TCE 'probably does not pose a strong carcinogenic risk for man.' In the …
Peculiar Histopathological Features Of Giardiasis In Distal Duodenal Biopsies, Z Abbas, A A. Qureshi, H Sheikh, S M. Jafri, A H. Khan
Peculiar Histopathological Features Of Giardiasis In Distal Duodenal Biopsies, Z Abbas, A A. Qureshi, H Sheikh, S M. Jafri, A H. Khan
Department of Pathology and Laboratory Medicine
Histological changes in 20 Giardia positive duodenal biopsies (Group A) were compared with 50, Giardia negative duodenal biopsies (Group B), taken during the same period. Stool examinations in Group B were negative for Giardia. Surface epithelium, villous and crypt architecture and cellular infiltrates were examined and compared between the groups. Atrophic changes in the villi were more common in Group A as compared to B(P < 0.0001). Intraepithelial neutrophil infiltration (P < 0.001), infiltration of the lamina propria with plasma cells (P < 0.5), and presence of eosinophils in the lamina propria (P < 0.001) were significant findings in group A. Some of the changes were related to the density of Giardia colonization e.g., the goblet cell depletion (P < 0.05) and the density of plasma cell infiltration in lamina propria (P < 0.01). Erosions and ulcerations were less commonly seen in group A. Thus we conclude that giardiasis manifests its peculiar features in the distal duodenal mucosa and a biopsy of this region is an important diagnostic tool for detection of this disease.
Ua66/14/4 Kentucky Partnership Newsletter, Vol. Ii, No. 4, Kentucky Partnership For Farm Family Health & Safety
Ua66/14/4 Kentucky Partnership Newsletter, Vol. Ii, No. 4, Kentucky Partnership For Farm Family Health & Safety
University Organizations
Newsletter created by and about the Kentucky Partnership for Farm Family Health & Safety.
A Thyroid Hormone-Regulated Gene In Xenopus Laevis Encodes A Type Iii Iodothyronine 5-Deiodinase., Donald L. St Germain, Robert Schwartzman, Walburga Croteau, Akira Kanamori, Zhou Wang, Donald D. Brown, Valerie Galton
A Thyroid Hormone-Regulated Gene In Xenopus Laevis Encodes A Type Iii Iodothyronine 5-Deiodinase., Donald L. St Germain, Robert Schwartzman, Walburga Croteau, Akira Kanamori, Zhou Wang, Donald D. Brown, Valerie Galton
Dartmouth Scholarship
The type III iodothyronine 5-deiodinase metabolizes thyroxine and 3,5,3'-triiodothyronine to inactive metabolites by catalyzing the removal of iodine from the inner ring. The enzyme is expressed in a tissue-specific pattern during particular stages of development in amphibia, birds, and mammals. Recently, a PCR-based subtractive hybridization technique has been used to isolate cDNAs prepared from Xenopus laevis tadpole tail mRNA that represent genes upregulated by thyroid hormone during metamorphosis. Sequence analysis of one of these cDNAs (XL-15) revealed regions of homology to the mRNA encoding the rat type I (outer ring) 5'-deiodinase, including a conserved UGA codon that encodes selenocysteine in …
Stab Wounds To Rat Brains : Demyelination, Remyelination And The Cellular Response, Particularly Of Oligodendrocytes, Xie Dangci
Loma Linda University Electronic Theses, Dissertations & Projects
The present body of knowledge concerning the results of central nervous system injury is incomplete and controversial. The role of oligodendrocytes, the cells involved in phagocytosis, the stages of demyelination, and the evidence for remyelination are of interest. Following stab wounds to rat brain cortex, corpus callosum and hippocampus, the animals were examined at 4,7,11,18,23,29,45,60 and 70 days postoperation (dpo). To help in the identification of cells immunocytochemical markers for astrocytes and immature oligodendrocytes were used. These were labels for glial fibrillary acidic protein (GFAP) and myelin/oligodendrocyte specific protein (MOSP) respectively. Light and electron microscopy were correlated using conventionally prepared …
The Relationship Of Dietary And Lifestyle Factors To Bone Mineral Density Of Healthy Singaporean Chinese Women, Ampai Dana Aimsiri
The Relationship Of Dietary And Lifestyle Factors To Bone Mineral Density Of Healthy Singaporean Chinese Women, Ampai Dana Aimsiri
Loma Linda University Electronic Theses, Dissertations & Projects
Few studies have examined the risk factors associated with reduced bone mass in Asians, but none specifically investigated Singaporean Chinese women. The subjects in this study were 16 premenopausal, 8 perimenopausal and 13 postmenopausal women who participated in a larger study which began in 1986. Bone density was measured in 1986 and 1992. Dietary and lifestyle data were collected for this study by personal interview. Association between dietary and lifestyle factors and bone density variables and change in bone density at the end of the 6 year period were assessed by univariate regression analyses.
Postmenopausal women had significantly lower baseline …
Effects Of Furosemide And Oleic Acid On Thyroxine Binding To Isolated Pairs Of Thyroxine Binding Serum Proteins, Deborah Hustead
Effects Of Furosemide And Oleic Acid On Thyroxine Binding To Isolated Pairs Of Thyroxine Binding Serum Proteins, Deborah Hustead
Loma Linda University Electronic Theses, Dissertations & Projects
Dosage dependent binding inhibition and redistribution of thyroxine (T4) between three pairs of thyroxine binding serum proteins, TBG-TTR, TBG-albumin and TTR-albumin, by furosemide (0.0 to 1.0 mol/L) and oleic acid (0.0 to 0.10 mol/L) were studied using equilibrium dialysis with purified binding proteins at concentrations 1/200 of levels in normal human sera, separated across the dialysis membrane and competing for T4.
Furosemide (1.0 mol/L) reduced TBG bound T4 in both the TBG-TTR system and TBG-albumin system (>90% decrease) and inhibited T4 binding to TTR in the TTR-albumin system (68% decrease) and to albumin …
The Production And Characterization Of A Monoclonal Antibody To A Naturally Occurring Aminomalonic Acid Epitope And A Comparison With An Antibody To A Synthetically Derived Aminomalonic Acid Epitope, James L. Gulley
Loma Linda University Electronic Theses, Dissertations & Projects
The goal for this project is to undertake the first step in the study of blocking metastasis by a monoclonal antibody. The long range goal of this line of research is to study a novel mechanism for the blocking of tumor metastasis in general and prostatic cancer metastasis in particular. The problem that this addresses is the growing number of cases of prostatic cancer in the increasingly aging male population. This cancer is not lethal unless it metastasizes, yet there is no cure for the metastatic disease. The inherent specificity of a monoclonal antibody combined with the uniqueness of the …
Short And Long Term Effects Of Proton Microbeam Irradiation : In The Lateral Geniculate Nucleus Of Felis Domesticus, Chad Sherwood Reder
Short And Long Term Effects Of Proton Microbeam Irradiation : In The Lateral Geniculate Nucleus Of Felis Domesticus, Chad Sherwood Reder
Loma Linda University Electronic Theses, Dissertations & Projects
Little is known of the effects of proton irradiation on neural tissue. A 1.0 mm microbeam was used on the cat lateral geniculate nucleus (LGN) to quantify the short term (< 3 months) and long term (< 9 months) effects of radiation damage. The LGN is a large structure with well defined afferent, efferent, and receptive field properties.
Electrophysiological and histological techniques were used to examine the effects of the microbeam at 60, 40, and 16 Gy, administered as a single bolus. Recordings of light evoked responses in the LGN were obtained using microelectrodes in nine animals within 12 weeks of irradiation, and 6 animals within 36 weeks of irradiation. Receptive fields were mapped onto a tangent screen using standard receptive field techniques. Histological measures included afferent …
Immunohistochemistry In Tumour Diagnosis--Who Actually Needs It?, S Pervez
Immunohistochemistry In Tumour Diagnosis--Who Actually Needs It?, S Pervez
Department of Pathology and Laboratory Medicine
No abstract provided.
Adoptive Transfer Of Polyclonal And Cloned Cytolytic T Lymphocytes (Ctl) Specific For Mouse Aids-Associated Tumors Is Effective In Preserving Ctl Responses: A Measure Of Protection Against Lp-Bm5 Retrovirus-Induced Immunodeficiency., William R. Green, Kathy A. Green, Karen M. Crassi
Adoptive Transfer Of Polyclonal And Cloned Cytolytic T Lymphocytes (Ctl) Specific For Mouse Aids-Associated Tumors Is Effective In Preserving Ctl Responses: A Measure Of Protection Against Lp-Bm5 Retrovirus-Induced Immunodeficiency., William R. Green, Kathy A. Green, Karen M. Crassi
Dartmouth Scholarship
Cytolytic T lymphocytes (CTL) can be raised against C57BL/6 B-cell lymphomas from mice with LP-BM5 murine leukemia virus-induced AIDS (MAIDS). Adoptive transfer of polyclonal anti-MAIDS tumor CTL or two CTL clones specific for the B6-1710 MAIDS lymphoma caused preservation of major histocompatibility complex-restricted and allogeneic CTL responses, which may be interpreted as indices of protection from LP-BM5 murine leukemia virus-induced immunodeficiency.
Santa Clara Magazine, Volume 36 Number 3, Summer 1994, Santa Clara University
Santa Clara Magazine, Volume 36 Number 3, Summer 1994, Santa Clara University
Santa Clara Magazine
7 - JAMAICA: THE OTHER SIDE OF PARADISE Religious organizations work to relieve the misery in a nation that, for some, is a vacation wonderland. By Mitch Finley '73 Political and economic analysis by Dennis R. Gordon
12 - I'll SEE YOU IN ADR! More and more people with civil disputes are finding themselves in alternative dispute resolution. But is ADR always the consumer's best choice? By Julie Sly '82
20 - UP CLOSE: MARIO BELOTTI The SCU economics professor of 35 years has become internationally renowned through hard work and (he says) being in the right place at the …
Determination Of Pancreatic And Salivary Amylase By Enzyme Immunoassay And Their Prevalence In Hyperamylasemic Patients, Sabdra Borgens Ward
Determination Of Pancreatic And Salivary Amylase By Enzyme Immunoassay And Their Prevalence In Hyperamylasemic Patients, Sabdra Borgens Ward
Theses and Dissertations in Biomedical Sciences
Currently, amylase determinations are nonspecific for the organ source and are based entirely on the enzymatic properties of amylase to produce a measurable product or byproduct. The determination of pancreatic amylase is important in the diagnosis of acute pancreatitis. Most commercially available tests for amylase employ the measurement of the change in NADH absorbance at 280 nm or of the p-nitrophenol released from a maltotetrose substrate. These are nonspecific measurements of pancreatic amylase and often necessitate other tests to be run such as a serum lipase.
The two predominant isoenzymes of amylase are pancreatic (p-amylase) and salivary (s-amylase); the most …
High Rates Of Frameshift Mutations Within Homo-Oligomeric Runs During A Single Cycle Of Retroviral Replication, Dawn P. Wooley, H. M. Temin
High Rates Of Frameshift Mutations Within Homo-Oligomeric Runs During A Single Cycle Of Retroviral Replication, Dawn P. Wooley, H. M. Temin
Neuroscience, Cell Biology & Physiology Faculty Publications
Homo-oligomeric runs were inserted into a spleen necrosis virus-based retrovirus vector to determine the nature and rate of mutations within runs of 10 to 12 identical nucleotides during a single replication cycle. Clones of helper cells containing integrated copies of retroviral vectors were used to produce virus for infection of target (nonhelper) cells. Proviral sequences from target cell clones were compared with proviral sequences from helper cell clones to study mutations that occurred during a single cycle of replication. In addition to the internal region spanning the homo-oligomeric inserts, a naturally occurring run of 10 T's in the long terminal …
Cerebral Microcirculatory Effects Of Maturation, Scott R. Elliott
Cerebral Microcirculatory Effects Of Maturation, Scott R. Elliott
Loma Linda University Electronic Theses, Dissertations & Projects
The present studies demonstrate that in the second (2B) and fourth (4B) branches of newborn and adult sheep middle cerebral arteries, 5-HT2 serotonergic receptors mediate contractile responses to serotonin and that alpha-1 adrenergic receptors mediate contractile responses to norepinephrine. In addition, tissue sensitivity to 5-HT and NE decreases significantly with maturation, but does not vary with branch order. These age-related changes were associated with a decrease in affinity and maximum response in 2B and 4B segments of 5-HT and NE contracted arteries, respectively. Norepinephrine and 5-HT occupancy at the pD2 rose significantly in 2B segments, but did not change …
Ua66/14/4 Kentucky Partnership Newsletter, Vol. Ii, No. 3, Kentucky Partnership For Farm Family Health & Safety
Ua66/14/4 Kentucky Partnership Newsletter, Vol. Ii, No. 3, Kentucky Partnership For Farm Family Health & Safety
University Organizations
Newsletter created by and about the Kentucky Partnership for Farm Family Health & Safety.
Review Of: Elizabeth M. Whelan, Toxic Terror: The Truth Behind The Cancer Scares, Sarah Redfield
Review Of: Elizabeth M. Whelan, Toxic Terror: The Truth Behind The Cancer Scares, Sarah Redfield
RISK: Health, Safety & Environment (1990-2002)
Review of: Elizabeth M. Whelan, Toxic Terror: The Truth Behind the Cancer Scares (Prometheus Books 1993). Acknowledgements, appendix, figures, foreword by Norman F. Borlaug, index, notes tables. LC 92-34154; ISBN 0-87975-788-4. [476 pp. Cloth $26.95. 59 John Glenn Drive, Buffalo NY 14228-2197.]
Antibacterial Effects Of A Silver Electrode Carrying Microamperage Direct Current In Vitro, Poh Chye Young, Luther C. Kloth, Linda Jean Laatsch-Lybeck
Antibacterial Effects Of A Silver Electrode Carrying Microamperage Direct Current In Vitro, Poh Chye Young, Luther C. Kloth, Linda Jean Laatsch-Lybeck
Physical Therapy Faculty Research and Publications
Currently, electrical stimulation is an accepted method used clinically to promote chronic wound healing. A literature review revealed that similar therapeutic current has been shown to suppress growth of common wound pathogens in vitro and in vivo. To date, little has been reported on the factors contributing to the antibacterial effects of microamperage direct current (μADC) stimulation. The purpose of this project was to investigate the role of electric field strength, current density, pH, and type of electrode used in vitro, to gain a better understanding of how these factors contribute to inhibiting growth of select wound pathogens. …
Healing Potential Of Osteotomies Of The Nasal Sinus In The Dog, Roderick W. Tataryn
Healing Potential Of Osteotomies Of The Nasal Sinus In The Dog, Roderick W. Tataryn
Loma Linda University Electronic Theses, Dissertations & Projects
Maxillary sinus osteotomy is sometimes indicated for transantral surgical approaches to palatal roots of maxillary molars. A search of the literature showed an absence of any report on the healing potential of such defects. The purpose of this study was to determine histologically the reparative process of the nasal sinus of dogs following small and large surgical antral perforations. After anesthetizing six beagle dogs, full thickness periosteal flaps were raised overlying the maxillary buccal cortical plates. A 5x5 mm diameter perforation was created with a trephine bur above the second maxillary premolar on one side of each animal. On the …
Measurement Of Blood Flow In Reflected Muco-Gingival Tissue Flaps In Cats : Using The Radiolabeled Microsphere Method, Gary T. Wuchenrich
Measurement Of Blood Flow In Reflected Muco-Gingival Tissue Flaps In Cats : Using The Radiolabeled Microsphere Method, Gary T. Wuchenrich
Loma Linda University Electronic Theses, Dissertations & Projects
Blood flow to the maxilla and mandible may vary due to differences in vascular supply and in physiologic, metabolic and pathologic conditions. In general it is accepted that oral tissues have an abundant blood supply; however, there is little information quantifying blood flow to these regions. In this study, the maxillary tissues were chosen to measure the blood flow in attached and reflected gingival tissue in adult cats using the radiolabeled microsphere method.
Sixteen cats with permanent dentition, clean mouths, and without inflamed gingiva upon visual inspection were used and divided into two groups. Group 1 consisted of six cats …