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Articles 6871 - 6900 of 7153
Full-Text Articles in Entire DC Network
Studies On The Regulation Of Cell Growth And Contact Inhibition Using Concanavalin A And Dibutyryl Adenosine Cyclic Monophosphate, Robert W. Teel
Studies On The Regulation Of Cell Growth And Contact Inhibition Using Concanavalin A And Dibutyryl Adenosine Cyclic Monophosphate, Robert W. Teel
Loma Linda University Electronic Theses, Dissertations & Projects
Both dibutyryl cyclic AMP and trypsinized concanavalin A have been shown to inhibit growth in certain cell lines but little testing of these substances has been done using human tumor cell lines. Further, there are at this time no published experimental attempts to correlate the effects on growth with a particular phase of the cell cycle in any cell line.
My experimental data show that the human tumor cell lines HeLa, HEp 2 and KB exhibit pronounced inhibition of growth when treated with trypsinized concanavalin A and reach a contact-inhibited state at a density far below that to which these …
End Matter, Vol. 16 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 16 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
The Hyobranchium And Throat Myology Of The Adult Ambystomidae Of The United States And Northern Mexico, John E. Krogh, Wilmer W. Tanner
The Hyobranchium And Throat Myology Of The Adult Ambystomidae Of The United States And Northern Mexico, John E. Krogh, Wilmer W. Tanner
Brigham Young University Science Bulletin, Biological Series
The 16 species and subspecies of the Ambystomidae of the United States are placed into six groups according to their throat morphology as follows: The Dicamptodon group, the Rhyacotriton group, the A. Annulatum–A. cingulatum group, the A. gracile-A. jeffersonianum-A. mabeei-A. macrodactylum-A. maculatum group, the A. talpoideum group, the A. opacum-A. texanum group, and the A. rosaceum-A. t. tigrinum-A. t. melanostictum-A. t. nebulosum group. Dicamptodon appears to be the most primitive group and Rhyacotriton the most specialized. Based on the morphology of the throat region it is suggested that A. rosaceum be placed in the tiger salamander group as a subspecies …
Front Matter, Vol. 16 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Understory Characteristics Related To Site Quality For Aspen In Utah, James H. Warner, Kimball T. Harper
Understory Characteristics Related To Site Quality For Aspen In Utah, James H. Warner, Kimball T. Harper
Brigham Young University Science Bulletin, Biological Series
An analysis has been made of the basic ecology of aspen forests of the mountainous areas of Utah and northern Arizona. Forty-nine study areas have been examined in respect to density, height and age of the tree cover, tree reproduction, and composition and biomass production of the understory. A graphic model of interspecific assocations among prevalent understory species has been prepared by a cluster-analysis procedure based on presence and absence of species in 1,225 small quadrats (0.25 m2) uniformly distributed among the 49 stands. The model separates species of relatively stable as opposed to rapidly seral aspen forests. …
End Matter, Vol. 16 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 15 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Ecology Of Sceloporus Occidentalis Longipes Baird And Uta Stansburiana Stansburiana Baird And Girard On Rainier Mesa, Nevada Test Site, Nye County, Nevada, Wilmer W. Tanner, James M. Hopkin
Ecology Of Sceloporus Occidentalis Longipes Baird And Uta Stansburiana Stansburiana Baird And Girard On Rainier Mesa, Nevada Test Site, Nye County, Nevada, Wilmer W. Tanner, James M. Hopkin
Brigham Young University Science Bulletin, Biological Series
This paper constitutes the first in a series of terminal reports to the United States Atomic Energy Commission for Contract AT (11–1) 1496. It includes a major study on the ecology and life history of Sceloporus occidentalis longipes Hollowell and a comparative study of three populations of Uta s. stansburiana Baird and Girard with special emphasis given for the Uta population on Rainier Mesa.
The study plot of major concern in this report is located on Rainier Mesa of the Nevada Test Site. Reports for other study plots (Frenchman's Flat–four study areas–and Mercury Valley ) will follow in the near …
End Matter, Vol. 15 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Reproductive Wastage In Sheep In Non-Clover Areas, C. H. Trotman
Reproductive Wastage In Sheep In Non-Clover Areas, C. H. Trotman
Journal of the Department of Agriculture, Western Australia, Series 4
A Research Round-up report in the June, 1972, issue of the Journal of Agriculture discussed the reproductive performance of sheep in Western Australia and indicated that more than 20 per cent, of mated ewes fail to lamb.
The report presented the first year's results from sheep grazing clover areas.
This report presents results from the nonclover sections of the investigations
The Effects Of The Four Psychological Primary Colors On Gsr, Heart Rate, And Respiration Rate, Keith W. Jacobs
The Effects Of The Four Psychological Primary Colors On Gsr, Heart Rate, And Respiration Rate, Keith W. Jacobs
Masters Theses
Measurement of GSR, heart rate, and respiration rate were taken on twenty-four male S's during presentation of four colors (red, yellow, green, blue). Four sequences of color presentations were used based on a 4 by 4 latin square with six subjects receiving each presentation. Significant color effects (p < .05) were found when GSR was used as the measure of activation. The most arousing color was red, followed by green, yellow, and blue, with significant differences in arousal value found between colors. Significant trial effects, disregarding colors, were found in respiration rate. No significant effects on heart rate were found as a function of trials or color. The arousal values of the colors do not support either a linear or U-shaped function of wave length.
Variability Of Cardiorespiratory Responses To A Standardized Submaximal Treadmill Test On Successive Days, Kenneth Paul Klipp
Variability Of Cardiorespiratory Responses To A Standardized Submaximal Treadmill Test On Successive Days, Kenneth Paul Klipp
Masters Theses
No abstract provided.
Voluntary Control Of Gsr Using Continuous Visual Display And Simultaneous Changes In Other Autonomic Functions, Laurence E. Boyce
Voluntary Control Of Gsr Using Continuous Visual Display And Simultaneous Changes In Other Autonomic Functions, Laurence E. Boyce
Masters Theses
Using 28 male undergraduate university students provided with continuous oscilloscope display of basal skin resistance, this study investigated voluntary control of the GSR and concurrent changes in respiration. It was found, given feedback, subjects could voluntarily raise or lower their GSR. Subjects instructed to increase their GSR (N-14) could do so within the first trial session. However, subjects instructed to decrease their GSR (N-14) required additional practice. With less than 20 minutes of practice all subjects were able to reach a criterion of 2,500 ohms change from their basal level. Subjects increasing their GSR were found to have a significant …
A Comparison Of Reaction Times Of High And Low Level Fitness Groups Before, During And After Treadmill Exercise, Robert Bruce Bergstrom
A Comparison Of Reaction Times Of High And Low Level Fitness Groups Before, During And After Treadmill Exercise, Robert Bruce Bergstrom
Masters Theses
No abstract provided.
End Matter, Vol. 15 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
New Records And Species Of Neotropical Bark Beetles (Scolytidae: Coleoptera) Part V, Stephen L. Wood
New Records And Species Of Neotropical Bark Beetles (Scolytidae: Coleoptera) Part V, Stephen L. Wood
Brigham Young University Science Bulletin, Biological Series
The tribe Carphodicticini, the genera Carphodicticus, Periocryphalus, and Phelloterus, and 101 species are described as new to science. Notes on the habits of Cladoctonus boliviae (Wood), Mimips mimicus Schedl, and Styphlosoma granulatum Blandford are included; and the female of Styphlosoma granulatum Blandford is described. The species new to science include the following: Phrixosoma crebrum, P. frustratum (Colombia), P. viriosum, Chramesus macrocornis, C. orinocensis, C. strigilis, C. imporcatus, C. impolitus, C. parcus, C. denticulatus, C. priscus, C. vinealis, C. solicitatus, C. peniculus, ChaetophJoeus andinus, Liparthrum carapae, L. meridensis (Venezuela), Pycnarthrum inornatum, Pyc. funerium, Pyc. perditum (Honduras), Pyc. fici (Honduras, Venezuela), Pyc. …
Front Matter, Vol. 15 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Mathematical Model Of Placental Oxygen And Carbon Dioxide Exchange, Ester P. Hill
Mathematical Model Of Placental Oxygen And Carbon Dioxide Exchange, Ester P. Hill
Loma Linda University Electronic Theses, Dissertations & Projects
This model of placental CO2 and O2 exchange calculates the time course of changes in PCO2, [HCO3-], and [H+] in each of four "compartments" of placental exchange vessels: maternal erythrocytes, maternal plasma, fetal plasma and fetal erythrocytes. The changes in hemoglobin-bound CO2 (carbamate) and oxyhemoglobin contents within the erythrocytes are also calculated, permitting consideration of the Haldane and Bohr effects. Equations were written to represent one-dimensional steady state CO2 and O2 diffusion between concurrent maternal and fetal capillaries and the subsequent hydration, carbamino and oxyhemoglobin reactions. The equations …
End Matter, Vol. 14 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 14 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 14 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
A Flora From The Dakota Sandstone Formation (Cenomanian) Near Westwater, Grand County, Utah, Samuel R. Rushforth
A Flora From The Dakota Sandstone Formation (Cenomanian) Near Westwater, Grand County, Utah, Samuel R. Rushforth
Brigham Young University Science Bulletin, Biological Series
A Cretaceous (Cenomanian) flora from the Dakota Sandstone Formation near Westwater, Grand County, Utah contains an admixture of ferns and angiosperms. The ferns of this flora are representative of an older Jurassic-Wealden vegetational type, whereas the angiosperms are typical of the modern vegetational type. Species of Gleichenia and Matonidium and Astralopteris coloradica represent the dominant forms in this flora.
The Westwater flora contains fourteen genera including nineteen species and one variety. New species described from this flora include Asplenium dakotensis, Coniopteris westwaterensis and Ilex serrata.
Botanical And Physiographic Reconnaissance Of Northern British Columbia, Stanley L. Welsh, J. Keith Rigby
Botanical And Physiographic Reconnaissance Of Northern British Columbia, Stanley L. Welsh, J. Keith Rigby
Brigham Young University Science Bulletin, Biological Series
The area of study is located in northern central British Columbia and includes the Sustut Basin and surrounding mountains. The physiography and geology of the region is described and the plant communities are enumerated. An annotated list of 205 species, 11 subspecies, and 35 varieties collected during the summer of 1969 is included.
Front Matter, Vol. 14 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 15 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
A List Of Arthropods Of Medical Importance Which Occur In Utah With A Review Of Arthropod-Borne Diseases Endemic In The State, Vernon J. Tipton, Robert C. Saunders
A List Of Arthropods Of Medical Importance Which Occur In Utah With A Review Of Arthropod-Borne Diseases Endemic In The State, Vernon J. Tipton, Robert C. Saunders
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 15 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 15 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 15 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.