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Articles 2041 - 2070 of 2283
Full-Text Articles in Physiology
End Matter, Vol. 18 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
The Effects Of Crowding On The Diurnal Ascorbic Acid Levels Of Albino Rats, Mary Jo Barr
The Effects Of Crowding On The Diurnal Ascorbic Acid Levels Of Albino Rats, Mary Jo Barr
Masters Theses
The adrenal physiology of the albino rat was studied through the measurement of adrenal ascorbic acid levels. A cyclic phenomenon was observed which follows the diel periodicity of the animal. Ascorbic acid values were found to be characteristically higher in males than in females. A similar difference was also seen in populations divided into young animals (body weight less than 175 grams) and old animals (body weight greater than 175 grams). Crowding, induced by manipulating the area of cage space per gram of body weight, was observed to be a definite stressor and caused the adrenal ascorbic acid levels to …
The Effects Of Acute Stress On Adrenal Ascorbic Acid Levels, Robert Joseph Collier
The Effects Of Acute Stress On Adrenal Ascorbic Acid Levels, Robert Joseph Collier
Masters Theses
The diurnal rhythm of adrenal ascorbic acid (DAR) displays an inverse relationship to the diurnal rhythm of circulating levels of plasma corticosteroids. Alloxan monohydrate, 175 mg/kg body weight was given subcutaneously to albino rats to determine the effect of the diabetic state on the DAR. A total of 200 female albino rats were divided into two study groups. Study Group I was composed of 150 animals divided into populations of 15, each including 3 controls. Study Group II was composed of populations of 5, each group containing all controls or all alloxinated rats. The populations of 15 were sacrificed at …
Front Matter, Vol. 17 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Fleas Of Venezuela, Vernon J. Tipton, Carlos E. Machado-Allison
Fleas Of Venezuela, Vernon J. Tipton, Carlos E. Machado-Allison
Brigham Young University Science Bulletin, Biological Series
Forty-three species of fleas were collected in Venezuela by personnel of the Smithsonian Venezuelan Project. Currently there are fifty-two species of fleas known from Venezuela. Four new taxa are described: Hormopsylla cryptica, Ctenidiosomus perplexus, Adoratopsylla antiquorum rara and Adoratopsylla antiquorum recta. The females of Adoratopsylla antiquorum discreta Jordan and Rothschildopsylla noctilionis (Costa Lima) are described. The families Stephanocircidae (Cleopsylla, Craneopsylla, Plocopsylla, Sphinctopsylla) and Pygiopsyllidae (Ctenidiosomus) are reported from Venezuela for the first time. Two male specimens of the genus Orchopeas constitute the first record of this genus in South America and records of species of the …
End Matter, Vol. 17 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Labidocarpid Bat-Mites Of Venezuela (Listrophoroidea: Labidocarpidae), Burruss Mcdaniel
Labidocarpid Bat-Mites Of Venezuela (Listrophoroidea: Labidocarpidae), Burruss Mcdaniel
Brigham Young University Science Bulletin, Biological Series
Nine species of bat-mites representing six genera of the family Labidocarpidae are recorded from Venezuela. The genus Pseudoalabidocarpus is described as new and contains a single species, P. secus, new species, collected from Phyllostomus elongatus and P. discolor. Two other new species are described: Lawrenceocarpus phyllostomus, new species, collected from Phyllostomus elongatus and Micronycteris hirsuta; and Labidocarpus dossuarius, new species, collected from Molossus major. New distribution and host records from Venezuela include: Alabidocarpus furmani on Glossophaga longirostris, Carollia perspicillata, C. brevicauda, Vampyrops helleri, Anoura caudifera and Pteronotus parnellii; A. nicaraguae on Uroderma magnirostrum; A. jonesi on Vampyrops helleri; Parakosa tadarida …
Venezuelan Amblyopinini (Insecta: Coleoptera; Staphylinidae), C. E. Machado-Allison, Alfredo Barrera
Venezuelan Amblyopinini (Insecta: Coleoptera; Staphylinidae), C. E. Machado-Allison, Alfredo Barrera
Brigham Young University Science Bulletin, Biological Series
Eight species of the tribe Amblyopinini are known from Venezuela. The descriptions of five species (Amblyopinus proximus, A. intermedius and A. metasternalis plus Amblyopinodes major and A. venezolanus) are given in this paper. Megamblyopinus seeversi Machado-Allison and Barrera is placed in the genus Amblyopinus and A. bolivari Barrera, Machado-Allison and Muñiz is reduced to a subspecies of A. schmidti Seevers. Data on hosts and distribution are given for the new species as well as A. emarginatus Seevers and A. waterhousei Fauvel.
Contributions To The Study Of The Genus Eriastrum: Ii. Notes Concerning The Type Specimens And Descriptions Of The Species, H. Keith Harrison
Contributions To The Study Of The Genus Eriastrum: Ii. Notes Concerning The Type Specimens And Descriptions Of The Species, H. Keith Harrison
Brigham Young University Science Bulletin, Biological Series
The species of the genus Eriastrum are described. Keys to the species and subspecies and the geographic ranges are provided. Discussions with regard to the type specimens or lectotypes and interspecific relationships are presented.
End Matter, Vol. 17 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 17 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Sucking Lice Of Venezuelan Rodents With Remarks On Related Species (Anoplura), Phyllis T. Johnson
Sucking Lice Of Venezuelan Rodents With Remarks On Related Species (Anoplura), Phyllis T. Johnson
Brigham Young University Science Bulletin, Biological Series
The paper includes discussions and descriptions of species of Anoplura known to occur on Venezuelan rodents, and of certain other taxa related to Venezuelan forms. Five genera are represented: Enderleinellus Fahrenholz—2 species: insularis Werneck and venezuelae Ferris; Hoplopleura Enderlein—19 species, 11 of them new: sciuricola Ferris; arizonensis Stojanovich and Pratt; aitkeni, new species; travassosi Werneck; abeli, new species; rimae, new species; angulata Ferris; indiscreta, new species; tiptoni, new species; handleyi, new species; eximia, new species; quadridentata (Neumann); contigua, new species; nesoryzomydis Ferris; oryzomydis Pratt and Lane; multilobata Werneck; splendida, new species; inusitata, new species; and orinocoi …
Mites Of The Family Laelapidae In Venezuela (Acarina: Laelapidae), Deane P. Furman
Mites Of The Family Laelapidae In Venezuela (Acarina: Laelapidae), Deane P. Furman
Brigham Young University Science Bulletin, Biological Series
This publication presents the results of an extensive survey of symbiotic laelapid mites of vertebrates from Venezuela. Over 40,000 vertebrates were examined from a wide variety of life zones and localities. The laelapid fauna represented includes 1 new genus, Hymenolaelpas, and 7 genera previously described: Laelaps, Mysolaelaps, Tur, Steptolaelaps, Neoparalaelaps, Gigantolaelaps, and Androlaelaps. The genera are represented by 51 species and subspecies, of which 8 are described as new. Previously unknown males and immatures of several species are described. Gigantolaelaps versteegi ( Oudemans ) is redescribed from type material; G. wolffsohni (Oudemans) is redescribed from Oudemans’ original material; G. peruviana …
Front Matter, Vol. 17 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 17 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 17 No. 6
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 17 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 16 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
New World Polyctenidae (Hemiptera), With Special Reference To Venezuelan Species, Norihiro Ueshima
New World Polyctenidae (Hemiptera), With Special Reference To Venezuelan Species, Norihiro Ueshima
Brigham Young University Science Bulletin, Biological Series
There are seven species of the polyctenid genus Hesperoctenes which occur in Venezuela. Six of these species are reported in this paper. H. longiceps (Waterhouse) is redescribed. Data on distribution and hosts and a key to the 15 species of the genus Hesperoctenes are given.
End Matter, Vol. 17 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 17 No. 5
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Ticks Of Venezuela (Acarina: Ixodoidea) With A Key To The Species Of Amblyomma In The Western Hemisphere, Eleanor K. Jones, Carleton M. Clifford, James E. Keirans, Glen M. Kohls
Ticks Of Venezuela (Acarina: Ixodoidea) With A Key To The Species Of Amblyomma In The Western Hemisphere, Eleanor K. Jones, Carleton M. Clifford, James E. Keirans, Glen M. Kohls
Brigham Young University Science Bulletin, Biological Series
Forty-nine species in 2 families and 10 genera are recorded for Venezuela. A key to the species of Amblyomma in the Western Hemisphere is given. Host and locality records are provided for each species. No new species are reported but the following 17 species are new for the fauna of Venezuela: Autricola silvai Cerný, 1967, Ornithodoros boliviensisO. brodyi Matheson, 1935, O. puertoricensis Fox, 1947, O. rossi Kohls, Sonenshine and Clifford, 1965, O. stageri Cooley and Kohls, 1941, O. yumatensis Cooley and Kohls, 1941, O. marinkellei Kohls and Clifford, 1969, O. viguerasi Cooley and Kohls, 1941, Amhblyomma extraoculatum Neumann, 1899, A. …
End Matter, Vol. 17 No. 6
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Venezuelan Nycteribiid Batflies (Diptera: Nycteribiidae), Lindolpho R. Guimarães
Venezuelan Nycteribiid Batflies (Diptera: Nycteribiidae), Lindolpho R. Guimarães
Brigham Young University Science Bulletin, Biological Series
Eleven species of Nycteribiidae, all belonging to the genus Basilia, are reported from Venezuela. Of these, two (tuttlei and typhlops) are described as new and four (anomala, dubia, juquiensis, and tiptoni) are recorded for the first time. B. anomala is the first species with three tergal plates to be found in South America. Synonymies, previous localities, and host records are given for all species, as well as new records and comments. Geographical distribution and host-parasite associations are discussed. Field parties of the Smithsonian Venezuelan Project obtained the material on which this paper is based.
Front Matter, Vol. 17 No. 5
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 16 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Spectral Analysis Of Olfactory System Electrical Activity: Effects Of Ketamine And Sodium Pentobarbital, John Ludwig Orr
Spectral Analysis Of Olfactory System Electrical Activity: Effects Of Ketamine And Sodium Pentobarbital, John Ludwig Orr
Masters Theses
No abstract provided.
The Boraginaceae Of Utah, Larry C. Higgins
The Boraginaceae Of Utah, Larry C. Higgins
Brigham Young University Science Bulletin, Biological Series
This paper presents a revision of the family Boraginaceae for the state of Utah. Ninety-three species in seventeen genera are recognized. The treatment includes keys, synonymy, descriptions, and citations of representative specimens found in the various herbaria in the state of Utah. The new combination Lappula occidentalis (Wats.) Greene var. cupulata (Gray) Higgins is presented.
End Matter, Vol. 16 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 16 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.