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Articles 61 - 90 of 484
Full-Text Articles in Life Sciences
Heritability Estimates For Forage Yield, In Vitro Dry Matter Digestibility, Crude Protein, And Heading Date In Indiangrass, K. P. Vogel, Herman J. Gorz, Francis A. Haskins
Heritability Estimates For Forage Yield, In Vitro Dry Matter Digestibility, Crude Protein, And Heading Date In Indiangrass, K. P. Vogel, Herman J. Gorz, Francis A. Haskins
Department of Agronomy and Horticulture: Faculty Publications
Space-planted populations derived from 'Holt' and 'Oto' indiangrass, Sorghastrum nutans (L.) Nash, were used to obtain heritability estimates for forage yield, in vitro dry matter digestibility (IVDMD), crude protein, and heading date and to determine their genotypic correlations. Heritability estimates were determined by variance component analyses and by parent-progeny regression. Average narrow sense heritability estimates for the two populations were 0.43, 0.42, and 0.50, for forage yield, IVDMD, and protein, respectively. Narrow sense heritability estimates for heading date were 0.90 or larger. Genotypic correlations of yield and IVDMD were negative for the Holt population but were positive, although low, for …
1981 (Fifty-Sixth) Spring Migration And Occurrence Report
1981 (Fifty-Sixth) Spring Migration And Occurrence Report
Nebraska Bird Review
Two hundred ninety-eight species are listed in this report, from 12 locations. The comparable figures from 1980 are 298 species from 14 locations; 1979292 from 12; and 1978300 from 13.
The symbols used in the tabulation are:
Ja, Fe, Mr, Ap, My, and Je for the months
P to indicate a species which is present all the year, although the same individuals may not be present during the whole year, and the numbers may vary greatly between periods. p to indicate a species which is permanent in Garden Co. but not at the Refuge. -S to indicate a species which …
Additional Christmas Count
Nebraska Bird Review
Additional Christmas Count
Information on the Norfolk Christmas Count was received after the tabulation was published (NBR). The count was taken 20 December 1980 from 7 AM to 5:30 PM, temperature was from -1 ° to 15° F, and wind from the south at 8 mph. The count was centered on the intersection of US 275 and US 81 (13th Street and Norfolk Avenue). Since the 15 December 1979 count was not included in the 1979 tabulation (NBR 48:15) it is also included (the first figure is for 1979).
Proceedings Of 14th Conference Prairie Grouse Technical Council. September 23-25, 1981: Halsey, Nebraska
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
HOST: Nebraska Game and Parks Commission
INTRODUCTION - Jim Mitchell, Upland Game Specialist, Nebraska Game and Parks Commission (Conference Coordinator)
WELCOME - Bill Bailey, Assistant Director, Nebraska Game and Parks Commission
IN MEMORIAM — This publication is dedicated to Ken Robertson
THE NEBRASKA SANDHILLS - AN OVERVIEW, Jon Farrar, Nebraska Game and Parks Commission
PRAIRIE GROUSE IN THE SANDHILLS, Carl W. Wolfe, Nebraska Game and Parks Commission
GROUSE ON fflE BESSEY DIVISION NEBRASKA NATIONAL FOREST, Steve Marquardt, U.S. Forest Service
EXPERIMENTAL SHARP-TAILED GROUSE INTRODUCTIONS IN PENNSYLVANIA, John J. Kriz, Pennsylvania Game Commission
ANALYSIS OF GREATER PRAIRIE CHICKEN POPULATION AND HARVEST …
Changes In Native Alcohol Dehydrogenase Activity Of Drosophila Upon Treatment With Guanidine Hydrochloride, Urea And Heat, Gurbachan Miglani, Franklin Ampy
Changes In Native Alcohol Dehydrogenase Activity Of Drosophila Upon Treatment With Guanidine Hydrochloride, Urea And Heat, Gurbachan Miglani, Franklin Ampy
Department of Biology Faculty Publications
Fifty-two isochromosomal lines ofDrosophila melanogaster were examined for the existence of additional genetic variations in ADH activity subsequent to treatment With guanidine hydrochloride, urea and heat. A wealth of hidden variation was discovered among and within the Mexican populations of the insect after treatment with the denaturants.
Statistical Analysis Of Cryptic Variation In Drosophila Alcohol Dehydrogenase, Gurbachan Miglani, Franklin Ampy
Statistical Analysis Of Cryptic Variation In Drosophila Alcohol Dehydrogenase, Gurbachan Miglani, Franklin Ampy
Department of Biology Faculty Publications
Statistical analysis indicated that mean alcohol dehydrogenase (ADH) activity levels within ADH1 and ADH11 isochromosomal lines varied significantly among the Mexican populations ofDrosophila melanogaster used. Also as indicated by coefficient of variation values for ADH activity, the relative amount of genetic variation differed among and within the ADH1 and ADH11 strains examined. The quantitative nature of the differences in ADH activity supported the concept of the additive gene action of the alcohol dehydrogenase (Adh) locus. The manner in which our isochromosomal lines were constructed suggested that genes regulating ADH activity inD. melanogaster were located on the second chromosomes.
Key To Trematodes Reported In Waterfowl, Malcolm Edwin Mcdonald
Key To Trematodes Reported In Waterfowl, Malcolm Edwin Mcdonald
Harold W. Manter Laboratory: Library Materials
This key is the second in a series for identification of the helminths reported in waterfowl (Family Anatidae, Order Anseriformes). The first was a key to nematodes (McDonald 1974).
The trematodes show the greatest variety of forms among the helminth parasites of waterfowl, including over half of all species reported; sometimes this group also includes the greatest part of the worms in a single bird. Over 500 species of trematodes have been reported in waterfowl. Almost all of these have been included in the present set of keys; it was not possible, however, to obtain the descriptions of a few …
False Cape State Park: Back Bay National Wildlife Refuge Study: A Public Access Analysis, N. Bartlett Theberge
False Cape State Park: Back Bay National Wildlife Refuge Study: A Public Access Analysis, N. Bartlett Theberge
Reports
No abstract provided.
Vims Open House For America's Victory Celebration, Virginia Institute Of Marine Science
Vims Open House For America's Victory Celebration, Virginia Institute Of Marine Science
Miscellaneous
Plans for the victory celebration are moving at full steam toward the October 16 opening date, with crowd expectation upwards of 200,000 over the four days. The overall event is being managed by the Virginia Independence Bicentennial Commission, and it will involve joint programs in Gloucester and York counties.
Remembrance Of Places Lasts: Proactive Inhibition And Patterns Of Choice In Rat Spatial Memory, William A. Roberts, Robert H.I. Dale
Remembrance Of Places Lasts: Proactive Inhibition And Patterns Of Choice In Rat Spatial Memory, William A. Roberts, Robert H.I. Dale
Scholarship and Professional Work - LAS
A series of experiments was carried out to evaluate the notion that rats given a sequence of massed daily trials on the radial maze reset working memory at the end of each trial by deleting its contents. Although curves presented by D. S. Olton [Scientific American, 1977, 236, 82-98: In S. H. Hulse, H. Fowler, & W. K. Honig (Eds.), Cognitive processes in animal behavior, 1978, Hillsdale, N.J.: Erlbaum] show that rats return to errorless performance at the beginning of each trial after the first, the fact that accuracy falls less rapidly over choices on Trial 1 …
Connquest, Sandra Cookson, D.W. Allinson, G.S. Speer, R.W. Taylor, R.P. Prince, J.W. Bartok, D.W. Protheroe, D.R. Miller
Connquest, Sandra Cookson, D.W. Allinson, G.S. Speer, R.W. Taylor, R.P. Prince, J.W. Bartok, D.W. Protheroe, D.R. Miller
Storrs Agricultural Experiment Station
No abstract provided.
Bulletin No. 26: Recycling Mycelium - A Fermentation Byproduct Becomes An Organic Resource, William A. Niering, Sally L. Taylor, R. Scott Warren, Nancy C. Olmstead, Edward R. Ricciuti, Timothy K. Reynolds, Michael E. Johnson, Mark Mcdonnell
Bulletin No. 26: Recycling Mycelium - A Fermentation Byproduct Becomes An Organic Resource, William A. Niering, Sally L. Taylor, R. Scott Warren, Nancy C. Olmstead, Edward R. Ricciuti, Timothy K. Reynolds, Michael E. Johnson, Mark Mcdonnell
Bulletins
No abstract provided.
Kentucky Warbler (Vol. 57, No. 3), Kentucky Library Research Collections
Kentucky Warbler (Vol. 57, No. 3), Kentucky Library Research Collections
Kentucky Warbler
No abstract provided.
Behavioural Budgeting By Wild Coyotes: The Influence Of Food Resources And Social Organization, Marc Bekoff, Michael C. Wells
Behavioural Budgeting By Wild Coyotes: The Influence Of Food Resources And Social Organization, Marc Bekoff, Michael C. Wells
Ethology Collection
Daytime behavioural budgets of coyotes (Canis latrans) living in the Grand Teton National Park Jackson, Wyoming, were analysed in order to determine how activity patterns ' ere influenced by food resources and social organization. In winter coyotes rested more-and hunted less than in other seasons. Pack-living coyotes rested more and travelled less than resident pairs or solitary resident or transients during winter months when the major food resource was ungulate (predominantly elk, Cervus canadensis) carrion. A mated female living in a pack rested significantly more and travelled significantly less than a mated female living only with her mate (as a …
Immunochemical Studies Of Conjugates Of Isomaltosyl Oligosaccharides To Lip I. Antigenicity Of The Glycolipids And The Production Of Specific Antibodies In Rabbits, Charles Wood, Elvin Kabat
Immunochemical Studies Of Conjugates Of Isomaltosyl Oligosaccharides To Lip I. Antigenicity Of The Glycolipids And The Production Of Specific Antibodies In Rabbits, Charles Wood, Elvin Kabat
Nebraska Center for Virology: Faculty Publications
The antigenicity of lipids is still ill-defined, and there is very little evidence that any pure lipid by itself will act as an antigen . To produce an immune response they must be complexed with or coupled to carriers (1-6) . Only glycosphingolipids and phosphatides have been found to function as haptens when mixed with carriers such as serum albumin (7), methylated bovine serum albumin (8), or other auxillary lipids (9-11), or when the glycolipid was incorporated into liposomes (12). Antibodies to glycolipids are usually directed primarily against the carbohydrate moiety (1, 7, 13, 14), and there is little evidence …
Ultrastructure Of The Tegument Of Intramolluscan Stages Of Proterometra Edneyi Nomen Nudum, Robin Munsey
Ultrastructure Of The Tegument Of Intramolluscan Stages Of Proterometra Edneyi Nomen Nudum, Robin Munsey
Masters Theses & Specialist Projects
Larval stages of Proterometra edneyi nomen nudum were obtained from Goniobasis laqueata and prepared for transmission and scanning electron microscopy. The tegument of rediae, cercariae within rediae and mature cercariae were observed to see if any differences occurred in relation to enivronmental and functional factors. The tegument was found to be similar in organization to that previously reported for other trematodes. Rediae were found to have patterned, folded teguments with many small microvilli indicative of the function of this surface to absorb nutrients. Microvilli were also present on the tegument of the cercarial body within the rediae along with infoldings …
Inhibition Of In Vitro Macrophage Digestion Capacity By Infection With Leishmania Donovani (Protozoa: Kinetoplastida), Gerald F. Kutish, John J. Janovy Jr.
Inhibition Of In Vitro Macrophage Digestion Capacity By Infection With Leishmania Donovani (Protozoa: Kinetoplastida), Gerald F. Kutish, John J. Janovy Jr.
John Janovy Publications
Promastigotes of Leishmania donovani transformed into amastigotes and survived in cultured macrophages. Promastigotes of Leptomonas costoris, a kinetoplastid parasite of water striders, transformed into amastigotes but did not survive in cultured macrophages. A significant difference in size between the two species of parasitic protozoa allowed development of a bioassay in which the in vitro digestion rate of L. costoris was taken as a measure of macrophage digestive capacity following preinfection with L. donovani. In a 12- to 24-hr period, macrophage cultures infected with the 2S strain of L. donovani retained 50% more L. costoris than did control macrophages …
Terranova Ceticola N. Sp. (Nematoda: Anisakidae) From The Dwarf Sperm Whale, Kogia Simus (Owen), In The Gulf Of Mexico, Thomas L. Deardorff, Robin M. Overstreet
Terranova Ceticola N. Sp. (Nematoda: Anisakidae) From The Dwarf Sperm Whale, Kogia Simus (Owen), In The Gulf Of Mexico, Thomas L. Deardorff, Robin M. Overstreet
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Terranova ceticola n. sp. is described from specimens in the stomachs of an individual dwarf sperm whale, Kogia simus, which stranded on the beach at Biloxi, Mississippi. It is characterized by possessing a single pair of medial preanal papillae, 38 to 40 pairs of lateral preanal papillae, five pairs of postanal papillae. and spicules 1 to 2% of the body length and by lacking cuticular plates at the posterior anal lip of males.
Determination Of The Presence, Species Composition, And Relative Abundance Of Anadeomous Fishes In Pohick Creek, Fairfax, Virginia, Joseph G. Loesch
Determination Of The Presence, Species Composition, And Relative Abundance Of Anadeomous Fishes In Pohick Creek, Fairfax, Virginia, Joseph G. Loesch
Reports
No abstract provided.
Organic Compounds In Surface Sediments And Oyster Tissues From The Chesapeake Bay, R. H. Bieri, P. O. Dufur, R. J. Huggett, W. Macintyre, P. Shou, C. L. Smith, C. W. Su
Organic Compounds In Surface Sediments And Oyster Tissues From The Chesapeake Bay, R. H. Bieri, P. O. Dufur, R. J. Huggett, W. Macintyre, P. Shou, C. L. Smith, C. W. Su
Reports
This report contains three parts. In Part I, the methodology to extract and analyze sediment and oyster tissue samples from the Chesapeake Bay is described in detail. Remaining problems are clearly identified. Part II contains the results and their discussion. Part III contains a number of appendices with detailed data. For those readers interested in still more detail, the complete bank of processed data is on computer tapes at this institute and at the Environmental Protection Agency-Chesapeake Bay Program office at Annapolis, Maryland. Also included in Part III we give the results of volatile halogenated organic compounds determined in water …
Production Of Unisexual Progenies By The Sorghum Midge, Contarinia Sorghicola, Frederick P. Baxendale, G. L. Teetes
Production Of Unisexual Progenies By The Sorghum Midge, Contarinia Sorghicola, Frederick P. Baxendale, G. L. Teetes
Department of Entomology: Faculty Publications
Mated females of the sorghum midge, Contarinia sorghicola (Coquillett) (Diptera: Cecidomyiidae), produce exclusively either male or female progenies. Unmated females deposit few eggs and produce no offspring. Production of single-sex progeny was not due to differential larval mortality of one sex.
Report Of Trip To Investigate Area Around Heron Island Bar In The Potomac River, Paul C. Kendall, Dexter S. Haven
Report Of Trip To Investigate Area Around Heron Island Bar In The Potomac River, Paul C. Kendall, Dexter S. Haven
Reports
No abstract provided.
Results Of The Alcoa Foundation-Suriname Expeditions. V. Noteworthy Records Of Surinamese Mammals, Hugh H. Genoways, Stephen L. Williams, Jane A. Groen
Results Of The Alcoa Foundation-Suriname Expeditions. V. Noteworthy Records Of Surinamese Mammals, Hugh H. Genoways, Stephen L. Williams, Jane A. Groen
University of Nebraska State Museum: Mammalogy Papers
The occurrence of seven species of mammals previously unknown in Suriname is documented. The new taxa recorded include Didelphis albiventris, Peropteryx macrotis, Lonchorhina aurita, Micronycteris hirsuta, Vampyrodes caraccioli, Furipterus horrens, and Thyroptera discifera . Additional information is provided on several species already known to occur in Suriname, including Metachirus nudicaudatus, Peronymus leucopterus, Mimon bennettii, Tonatia carrikeri, T. schulzi, Anoura geoffroyi, Choerniscus intermedius, Mesophylla macconnelli, Neaeomys guianae, Holochilus brasiliensis, and Potos fiavus.
Results Of The Alcoa Foundation-Suriname Expeditions. Vi. Additional Chromosomal Data For Bats (Mammalia: Chiroptera) From Suriname, Robert J. Baker, Hugh H. Genoways, Paisley A. Seyfarth
Results Of The Alcoa Foundation-Suriname Expeditions. Vi. Additional Chromosomal Data For Bats (Mammalia: Chiroptera) From Suriname, Robert J. Baker, Hugh H. Genoways, Paisley A. Seyfarth
University of Nebraska State Museum: Mammalogy Papers
As part of ongoing studies of the bats of Suriname, karyotypic information is presented for seventeen species. Chromosomal data are presented for the first time for Peronymus leucopterus, Peropteryx macrotis, Mimon bennettii, Artibeus concolor, Furipterus horrens, and Thyroptera discifera. Additional chromosomal data are presented for eleven other species of bats for which some information was available previously.
Results Of The Tenth International Winter Wheat Performance Nursery Grown In 1978, S. L. Kuhr, V. A. Johnson, P. J. Mattern, K. D. Wilhelmi, J. W. Schmidt
Results Of The Tenth International Winter Wheat Performance Nursery Grown In 1978, S. L. Kuhr, V. A. Johnson, P. J. Mattern, K. D. Wilhelmi, J. W. Schmidt
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
This is the tenth report of results from an International Winter Wheat Performance Nursery (IWWPN) organized in 1968 by the Nebraska Agricultural Experiment Station in cooperation with the Science and Education Administration (SEA), U.S. Department of Agriculture, under contract number AID/ta-C-1093 with the U.S. International Development Corporation, Agency for International Development. The Nursery was designed to (1) test the adaptation and stability of winter wheat cultivars in a range of latitudes, daylengths, fertility conditions, water management regimes, and disease complexes; (2) identify superior winter cultivars to serve as recipient genotypes for high protein and high lysine genes: (3) test the …
Crossbreeding In Swine: Experimental Results, Rodger K. Johnson
Crossbreeding In Swine: Experimental Results, Rodger K. Johnson
Department of Animal Science: Faculty Publications
A review of recent swine crossbreeding experiments is presented and integrated with earlier work. Variation among experiments in observed heterosis for specific crosses was large for reproduction and sow productivity traits. However, standard errors of estimates were also large. It seems likely that heterosis, expressed in absolute values or in percentage units, is different for specific crosses. It is unclear whether these differences are large enough to warrant the use of unique parameter values for comparisons of alternate mating systems. In addition to average heterosis values, average direct and maternal genetic effects are given.
Performance Of Radial And Bias-Ply Ri Tractor Drive Tires In Tilled Clay Loam Soil, University Of Tennessee Agricultural Experiment Station, F. D. Tompkins, L. R. Wilhelm
Performance Of Radial And Bias-Ply Ri Tractor Drive Tires In Tilled Clay Loam Soil, University Of Tennessee Agricultural Experiment Station, F. D. Tompkins, L. R. Wilhelm
Research Reports
No abstract provided.
Herbicide Evaluation For Weed Control, University Of Tennessee Agricultural Experiment Station, L. S. Jeffery, R. M. Hayes, J. R. Evans, T. D. Cordrey, D. L. Coffey, J. R. Overton
Herbicide Evaluation For Weed Control, University Of Tennessee Agricultural Experiment Station, L. S. Jeffery, R. M. Hayes, J. R. Evans, T. D. Cordrey, D. L. Coffey, J. R. Overton
Research Reports
No abstract provided.
Impact Of New Manufacturing Plants In Rural Areas Of Tennessee On Employee Family Income Distribution, University Of Tennessee Agricultural Experiment Station, Thomas H. Klindt, Maurice R. Landes, Brady J. Deaton
Impact Of New Manufacturing Plants In Rural Areas Of Tennessee On Employee Family Income Distribution, University Of Tennessee Agricultural Experiment Station, Thomas H. Klindt, Maurice R. Landes, Brady J. Deaton
Bulletins
No abstract provided.
Systematics Of Isocarpha (Compositae: Eupatorieae), David J. Keil, Tod F. Stuessy
Systematics Of Isocarpha (Compositae: Eupatorieae), David J. Keil, Tod F. Stuessy
Biological Sciences
Isocarpha comprises five species ranging from southern Texas and the Bahamas to northern Peru and northeastern Brazil. The genus belongs in Eupatorieae rather than Heliantheae, but structure of the head of Isocarpha with its elongate, chaffy receptacle is anomalous within Eupatorieae. An hypothesis is presented suggesting the evolutionary derivation of this type of head through formation of floral buds in the axils of the involucral bracts. Generic ties of Isocarpha within Eupatorieae are unclear, but the closest affinities appear to be with Ayapana and relatives.