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Full-Text Articles in Life Sciences
Distal Urogenital Anatomy Of Male Prairie Racerunners, Aspidoscelis Sexlineatus Viridis (Reptilia: Sauria: Teiidae), Stanley E. Trauth
Distal Urogenital Anatomy Of Male Prairie Racerunners, Aspidoscelis Sexlineatus Viridis (Reptilia: Sauria: Teiidae), Stanley E. Trauth
Journal of the Arkansas Academy of Science
I examined histologically the distal urogenital anatomy in male Prairie Racerunners (Aspidoscelis sexlineatus viridis) from a small seasonal sample of individuals collected in Arkansas in order to provide additional information regarding squamate urogenital anatomy. Specifically, I focused on the basic anatomy and positioning of posterior ducts and associated structures in this teiid lizard. The anatomical structures included the ductus deferens, ampulla ductus deferens, ampulla urogenital papilla (Aup), ureter, inner core tissue mass, urodaeum, and the urogenital papilla. The two Aup, which are small complimentary blind pouches representing the terminal repositories for products released by urogenital ducts, are striking …
Analysis Of Human Tacc3 In Cellular Responses To Polycyclic Aromatic Hydrocarbons, Ivan H. Still, B. Lauffart
Analysis Of Human Tacc3 In Cellular Responses To Polycyclic Aromatic Hydrocarbons, Ivan H. Still, B. Lauffart
Journal of the Arkansas Academy of Science
Very little is known about the etiology of ovarian cancer. However, studies have shown that occupational exposure to polycyclic aromatic hydrocarbons (PAHs) and tobacco smoking can increase ovarian cancer risk. Previously, we have determined that 100% of ovarian tumors show loss or aberrant subcellular localization of TACC3 (transforming acidic coiled coil 3) relative to the normal ovarian surface epithelium (OSE). In mice, a role for TACC3 in the cellular response to PAH has been defined. However, comparable studies for human TACC3 has not been performed. In this report, we show that specific knockdown of TACC3 in human ovarian cancer cells …
Organometallic Ruthenium Complexes Of Novel Thiosemicarbazones, Floyd A. Beckford, Amon T. Holt
Organometallic Ruthenium Complexes Of Novel Thiosemicarbazones, Floyd A. Beckford, Amon T. Holt
Journal of the Arkansas Academy of Science
We present the preliminary results of a study of two novel thiosemicarbazones (TSCs) and theirruthenium complexes. The TSCs were prepared by refluxing thiosemicarbazide with 9-anthraldehyde or benzanthrone in ethanol for 3 hours. The metal complex of each ligand (complex I =[(r|6 -C6H6 )Ru(9-ant-TSC )(C1)]C1 and complex II= [(r|6 -C6H6 )Ru(benz-TSC)(Cl)]Cl) was prepared by refluxing the appropriate TSC with [(r|6 -C6H6 )RuCl 2 ] r The compounds were characterized using infrared, ultraviolet-visible, and NMRspectroscopy. Two different methods, the disk diffusion test and luminometry, were used to test the compounds against a variety of different bacterial strains for antibacterial activity. The most …
Effect Of Ionizing Radiation On Trichomonas Vaginalis: Increase In Red Pigmented Intracellular Bodies Associated With Irradiated Cells, James J. Daly Sr., Terryl L. Hostetler, Max L. Baker
Effect Of Ionizing Radiation On Trichomonas Vaginalis: Increase In Red Pigmented Intracellular Bodies Associated With Irradiated Cells, James J. Daly Sr., Terryl L. Hostetler, Max L. Baker
Journal of the Arkansas Academy of Science
No abstract provided.
Synthesis And Evaluation Of New Cathepsin D Inhibitors, Rose M. Mcconnell, Walter E. Godwin, Kelley Sayyer, Carol Trana, Adam Green, Matthew Mcconnell, Ashley Young, Lauren Young, Susan E. Hatfield
Synthesis And Evaluation Of New Cathepsin D Inhibitors, Rose M. Mcconnell, Walter E. Godwin, Kelley Sayyer, Carol Trana, Adam Green, Matthew Mcconnell, Ashley Young, Lauren Young, Susan E. Hatfield
Journal of the Arkansas Academy of Science
Cathepsin D, a lysosomal aspartic protease, has been suggested to play a role in the metastatic potential of several types of cancer A high activated cathepsin D level in breast tumor tissue has been associated with an increased incidence of relapse and metastasis. High levels of active cathepsin D have also been found in colon cancer, prostate cancer, uterine cancer, and ovarian cancer. Hydroxyethyl isosteres with cyclic tertiary amine have proven to be clinically useful as inhibitors of aspartyl proteases, such as cathepsin D and the HIV1 aspartyl protease. Also cathepsin D has recently been associated with the development of …
Preparation Of Novel Hydroxyethyl Amine Isosteres As Potential Cathepsin D Inhibitors, Rose M. Mcconnell, Walter E. Godwin, Amy Stefan, Crystal Newton, Nikki Herring, Crissy Goss
Preparation Of Novel Hydroxyethyl Amine Isosteres As Potential Cathepsin D Inhibitors, Rose M. Mcconnell, Walter E. Godwin, Amy Stefan, Crystal Newton, Nikki Herring, Crissy Goss
Journal of the Arkansas Academy of Science
Cathepsin D is a lysosomal aspartic protease found in all mammalian cells and is considered to be one of the main catabolic proteinases. Cathepsin D has been suggested to play a role in the metastatic potential of several types of cancer. A high activated cathepsin D level in breast tumor tissue has been associated with an increased incidence of relapse and metastasis. High levels of active cathepsin D have also been found in colon cancer, prostate cancer, uterine cancer, and ovarian cancer. Hydroxyethyl isosteres with cyclic tertiary amine have proven to be clinically useful as inhibitors of aspartyl proteases similar …
Examination Of The Cell Wall Of Micrasterias Radiosa Var Radiosa (Conjugatophyceae) By Transmission And Scanning Electron Microscopy, Jennifer A. Akin, Richard L. Meyer
Examination Of The Cell Wall Of Micrasterias Radiosa Var Radiosa (Conjugatophyceae) By Transmission And Scanning Electron Microscopy, Jennifer A. Akin, Richard L. Meyer
Journal of the Arkansas Academy of Science
The cell wall of Micrasterias radiosa var. radiosa Ralfs 1848 (Conjugatophyceae) was examined by transmission and scanning electron microscopy. Previous electron microscopy of this taxon has not been performed; thus these are new observations. The cell wall was recognized to be of the Cosmarium type with complex pores external to the plasma membrane that penetrate the secondary wall and with ornamentation arising from the secondary wall. Subdivided regions of the pore apparatus, the pore head, pore bulb, connecting pore channel, and pore depression were detected. Pores of type 4 were located in the isthmal region and at the division of …
Liver Lipids Profiles In Nude Mice Implanted Subcutaneously With Cells Of Human Prostate Adenocarcinoma Grade Iv, Lawrence M. Mwasi
Liver Lipids Profiles In Nude Mice Implanted Subcutaneously With Cells Of Human Prostate Adenocarcinoma Grade Iv, Lawrence M. Mwasi
Journal of the Arkansas Academy of Science
Liver lipid changes in male BALB-c nude mice due to subcutaneously implanted human prostate metastatic grade IV adenocarcinoma was studied. The prostate cancer cells were cultured in F12 plus 7.5% horse serum and 25% fetal calf serum medium. When they reached confluence, some of these cells were fixed with glutaraldehyde and thoroughly washed with buffer then 4 x107 cells were implanted into four mice. Four more mice were implanted with 4 x 106 viable, unfixed cells. Four uninjected mice served as controls. All the mice were sacrificed 18 days later. The total liver lipids (TLL) from each liver were extracted …
Correlation Between Chromatid Deletion Production And Progression Of The Dna Replication Fork In Uv-Irradiated S Phase Xenopus Cells, Daniel M. Yoder, Jason M. Hiles, H. Gaston Griggs
Correlation Between Chromatid Deletion Production And Progression Of The Dna Replication Fork In Uv-Irradiated S Phase Xenopus Cells, Daniel M. Yoder, Jason M. Hiles, H. Gaston Griggs
Journal of the Arkansas Academy of Science
Experimentation was performed primarily to determine whether progression of the DNA replication fork along segments of S phase Xenopus chromosomes, which contain UV-induced pre-aberrational lesions, plays a significant role in conversion of these lesions into chromatid deletions. Specifically, a Xenopus chromosome that was both easy to identify and that possessed a single DNA replication fork in one arm was found and used to conduct the experimentation. This chromosome was exposed to UV in early S phase and a Bromodeoxyuridine/Giemsa differential staining technique was applied in conjunction with conventional aberrational techniques to correlate progression of the DNA replication fork through segments …
Photoreactivation Of Uv-Induced Damage In G1 Phase Xenopus Cells That Leads To A Sister Chromatid Exchanged And Cell Death, Dawn Laswell, Jennifer Barber, H. Gaston Griggs
Photoreactivation Of Uv-Induced Damage In G1 Phase Xenopus Cells That Leads To A Sister Chromatid Exchanged And Cell Death, Dawn Laswell, Jennifer Barber, H. Gaston Griggs
Journal of the Arkansas Academy of Science
Experiments were conducted with the A87 Xenopus tissue culture cell line which centered on use of the line's efficient photoreactivation (PR) mechanism to: (1) determine the extent to which sister chromatid exchanges (SCEs), induced by exposing early G1 phase cells to low UV fluenced, are photoreactivable, and (2) determine the extent to which the photoreactivable SCEs resulting from these low UV fluences constitute lethal lesions. For the first determination, UV fluences - SCE frequency relations and UV fluence + PR fluence - SCE frequency relations were established for UV fluences in the range 0-12 J/m2 and a single PR fluence …
Reproductive Performance Of Female White-Tailed Deer On Holla Bend National Wildlife Refuge, Thomas A. Nelson
Reproductive Performance Of Female White-Tailed Deer On Holla Bend National Wildlife Refuge, Thomas A. Nelson
Journal of the Arkansas Academy of Science
Aspects of the reproductive biology of female white-tailed deer (Odocoileus virginianus) on Holla Bend National Wildlife Refuge were investigated by examining the reproductive tracts of 121 deer harvested during the 1985-90 archery seasons. The presence of corpora albicantia in yearlings suggested that 27% of female fawns conceived, producing a mean of 1.0 ova/breeding fawn. Pregnancy rates among yearlings and adults averaged 94% and 97%, respectively. Ovulation rates averaged 1.4 and 2.0 ova/female among yearlings and adults. Some females were ovulating in early-October, but the earliest conceptions occurred during the last week of October. The peak breeding period for yearlings and …
Time Course Of Photoreactivation Of Uv Induced Damage In G1 Phase Xenopus Cells That Leads To Chromosome Breaks Observable By Premature Chromosome Condensation, Robert Wright, Stephen Ruble, H. Gaston Griggs
Time Course Of Photoreactivation Of Uv Induced Damage In G1 Phase Xenopus Cells That Leads To Chromosome Breaks Observable By Premature Chromosome Condensation, Robert Wright, Stephen Ruble, H. Gaston Griggs
Journal of the Arkansas Academy of Science
No abstract provided.
Photoreactivation Of Chromatid Deletions Induced By Uv-Irradiation Of G1 Phase Hamster X Xenophus Hybrid Cells, Joel Staggers, H. Gaston Griggs
Photoreactivation Of Chromatid Deletions Induced By Uv-Irradiation Of G1 Phase Hamster X Xenophus Hybrid Cells, Joel Staggers, H. Gaston Griggs
Journal of the Arkansas Academy of Science
No abstract provided.
Photoreactivation Of The Effect Of Uv Light On Gamma Ray Induced Chromosome Aberration Production In G1 Phase Xenophus Cells, Rebecca Rowe, H. Gaston Griggs
Photoreactivation Of The Effect Of Uv Light On Gamma Ray Induced Chromosome Aberration Production In G1 Phase Xenophus Cells, Rebecca Rowe, H. Gaston Griggs
Journal of the Arkansas Academy of Science
No abstract provided.
Repair Of Ultraviolet And Gamma-Ray Induced Lethal Damage In An Insect Tissue Culture Cell Line, Craig Endres, Susan Kulp, H. Gaston Griggs
Repair Of Ultraviolet And Gamma-Ray Induced Lethal Damage In An Insect Tissue Culture Cell Line, Craig Endres, Susan Kulp, H. Gaston Griggs
Journal of the Arkansas Academy of Science
No abstract provided.
Development Of Tissue Culture Systems For The Evaluation Of Cancer Chemotherapeutic Agents, Clifton Orr, Joseph E. Stone, Maxine L. Polk
Development Of Tissue Culture Systems For The Evaluation Of Cancer Chemotherapeutic Agents, Clifton Orr, Joseph E. Stone, Maxine L. Polk
Journal of the Arkansas Academy of Science
No abstract provided.
Dark Repair Of Lethal Damage Induced In A Hybrid Mammalian Tissue Culture Cell Line By Ultraviolet Light, Robin Haetten, Margaret Mcguinness, H. Gaston Griggs
Dark Repair Of Lethal Damage Induced In A Hybrid Mammalian Tissue Culture Cell Line By Ultraviolet Light, Robin Haetten, Margaret Mcguinness, H. Gaston Griggs
Journal of the Arkansas Academy of Science
No abstract provided.
Time Course Of Pr Of Uv-Induced Chromosomal Aberrations And Lethal Damage In S And G2 Xenopus Cells, Jan Payne, H. Gaston Griggs
Time Course Of Pr Of Uv-Induced Chromosomal Aberrations And Lethal Damage In S And G2 Xenopus Cells, Jan Payne, H. Gaston Griggs
Journal of the Arkansas Academy of Science
Sand G2 phase cells were exposed to 150 ergs mm⁻² UV and their ability to photoreactivate the induced cell killing (loss of colony forming ability) and chromosomal aberrations was determined as a function of time following the UV exposure. In S phase cells, the lesions leading to cell death and those leading to aberrations were both converted to a non-photoreactivable state shortly after the UV exposure. A significant fraction of the lesions induced in G2 cells, that led to cell death, were converted to a non-photoreactivable state before the progeny of the exposed cells reached the next succeeding S phase. …
Scanning Electron Microscope Study Of Brachysclereids Of Pear (Pyrus Communis L.), Clarence B. Sinclair
Scanning Electron Microscope Study Of Brachysclereids Of Pear (Pyrus Communis L.), Clarence B. Sinclair
Journal of the Arkansas Academy of Science
The external surfaces of pear sclereids commonly are illustrated as covered with apertures. This SEAA investigation of the surface features has shown the surface to have few or no apertures. When the primary wall layer was removed the typical ramiform canal system was obvious. This observation confirms the often-ignored fact that the pitapertures of the secondary wall are not continuous with the primary wall. Hence, they do not show on the surfaces of the intact cell.
Light And Electron Microscope Study Of The Mitotic Apparatus Of The Ring-Legged Earwig, Euborellia Annulipes (Lucas), Vonnie R. Prentice, William L. Evans
Light And Electron Microscope Study Of The Mitotic Apparatus Of The Ring-Legged Earwig, Euborellia Annulipes (Lucas), Vonnie R. Prentice, William L. Evans
Journal of the Arkansas Academy of Science
The mitotic apparatus in dividing cells of the ring-legged earwig is composed of the cell center or pole, chromosomal fibers, continuous fibers, and chromosomal and background structure. Parts from cellular elements such as Golgi membranes, endoplasmic reticulum, and nuclear envelope as well as whole mitochondria associate with the spindle microtubules to produce the diffraction pattern of the spindle fibers as seen with the light microscope. The microtubules of the chromosomal fibers attach independently and demonstrate the diffuse nature of the centromere or polycentric condition of the chromosomes.
Effects Of Urethan On Fish Epithelial And Fibroblast Cells In Vitro, Leland F. Morgans
Effects Of Urethan On Fish Epithelial And Fibroblast Cells In Vitro, Leland F. Morgans
Journal of the Arkansas Academy of Science
The effects of urethan on RTG-2 and FHM cells were studied in vitro, by using the mitotic index, it was determined that 0.3 percent urethan caused an increase in the rate of cell division while higher concentrations (0.6, 0.9, 1.2, and 1.5 percent) caused either a decrease in the rate or a cessation of cell division. Concentrations of urethan higher than 1.5 percent killed the cells. The mitotic index data also indicated that epithelial cells continued to divide at a higher concentration of urethan than did the fibroblast cells. The morphological effects of urethan on the two cell lines were …
Rapid Electroosmosis Measurements, James O. Wear
Rapid Electroosmosis Measurements, James O. Wear
Journal of the Arkansas Academy of Science
A cell has been designed and built that allows for rapid measurement of volume moved in a definite time by electroosmosis. The cell is simple to use and is not very elaborate. Using a water jacket, the cell temperature can be controlled to ± 0.1° C. Measurements are presented for acetonitrile, dimethylformamide, and nitrobenzene at 25° C for applied voltages of 25, 50, 75, and 100 volts.
Hemolysis By Crotalus Horridus Atricaudatus Venom, Franklin E. Byrd, Bob D. Johnson
Hemolysis By Crotalus Horridus Atricaudatus Venom, Franklin E. Byrd, Bob D. Johnson
Journal of the Arkansas Academy of Science
No abstract provided.
Microirradiation Of Living Fungal Cells With A Laser, John L. Robertson, Charles L. Wilson
Microirradiation Of Living Fungal Cells With A Laser, John L. Robertson, Charles L. Wilson
Journal of the Arkansas Academy of Science
No abstract provided.
Effects Of Hydroxyurea On Cultured Somatic Cells Of The Chinese Hamster, Cricetulus Griseus, Charlotte Neill, William C. Guest
Effects Of Hydroxyurea On Cultured Somatic Cells Of The Chinese Hamster, Cricetulus Griseus, Charlotte Neill, William C. Guest
Journal of the Arkansas Academy of Science
No abstract provided.
Proposed Mechanisms Of Asexual Nuclear Division In Neurospora Crassa Shear And Dodge, Charles L. Wilson, John A. Brushaber, James R. Aist
Proposed Mechanisms Of Asexual Nuclear Division In Neurospora Crassa Shear And Dodge, Charles L. Wilson, John A. Brushaber, James R. Aist
Journal of the Arkansas Academy of Science
No abstract provided.
Observations On Nuclear Division In Vegetative Hyphae Of Ceratocystis Fagacearum, James R. Aist, Charles L. Wilson
Observations On Nuclear Division In Vegetative Hyphae Of Ceratocystis Fagacearum, James R. Aist, Charles L. Wilson
Journal of the Arkansas Academy of Science
No abstract provided.
Some Effects Of Ionizing Radiation On The Oral Suckers Of Rana Pipiens Embryos, Charles C. Reed
Some Effects Of Ionizing Radiation On The Oral Suckers Of Rana Pipiens Embryos, Charles C. Reed
Journal of the Arkansas Academy of Science
No abstract provided.
Epidermal Pore Of Oxcymitra Paleacea Bischoff, Eugene B. Wittlake
Epidermal Pore Of Oxcymitra Paleacea Bischoff, Eugene B. Wittlake
Journal of the Arkansas Academy of Science
No abstract provided.