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Nonsense Mutations In The Chlamydomonas Chloroplast Gene That Codes For The Large Subunit Of Ribulosebisphosphate Carboxylase/Oxygenase, Robert J. Spreitzer, Michel Goldschmidt-Clermont, Michele Rahire, Jean-David Rochiax

Department of Biochemistry: Faculty Publications

The Chlamydomonas reinhardtii chloroplast mutants 18-SB and 18-7G lack both the chloroplast-encoded large subunit and nuclear-encoded small subunit of the chloroplast enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (EC 4.1.1.39). A chloroplast intergenic-suppression model has been postulated to account for the genetic instability of 18-5B revertants. Here, we have determined the molecular basis of the 18-SB and 18-7G mutants. They contain nonsense mutations close to the 3' and 5' ends of their large-subunit genes, respectively. Puls-chase experiments revealed that the 18-SB mutant produces a truncated large subunit that is unstable. In connection with previous experiments, this work identifies nonsense suppression in the chloroplast. Small …

Acidification Sources In Red Alder And Douglas-Fir Soils -- Importance Of Nitrification, H. Van Miegroet, D. W. Cole

Watershed Sciences Faculty Publications

Precipitation, throughfall, forest floor, and soil leachate samples were monitored continuously in 1981 and 1982 in a N-poor Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] forest and a red alder (Alnus rubra Bong.) forest growing adjacently on a glacial soil in western Washington. The purpose of the study was to quantify the relative importance of atmospheric vs. natural sources of H+ input to forest soil acidification, and to determine the role of N transformation processes in the overall H+ balance of soils with different N status. Rainwater samples had an avg pH of 4.7 and annual H+ deposition via precipitation averaged 320 …

Application Of Electron Spin Resonance Techniques To Model Starch Systems, L. E. Pearce, E. A. Davis, J. Gordon, W. G. Miller

Food Structure

Starch model systems were examined by electron spin resonance (ESR) techniques with either 16-DOXYL-stearic acid or TEMPO spin probes in water or hexane. Room temperature starchwater- 16-DOXYL-stearic acid spectra showed strong adsorption occurred between the starch and probe. Starch-water-TEMPO spectra at room temperature did not show strong adsorption between starch and probe, but did show some slowed motion of the probe as a result of different local environments experienced by the probe within the starch granule. Starch-water-probe spectra from systems heated from 45-95° C showed no major differences from unheated samples. Also, no major spectral differences existed for each starch …

Seed Structure And Composition Of Potential New Crops, D. W. Irving, R. Beckler

Food Structure

Prosopis , Ol neya , and Amaranthus have potenti a l economic value as food or feed crops fo r a rid /semi- arid r egions. Ma ture seeds of these genera we r e examined using scanning e l ec tron and fluoresce nce microscopy to define a natomy and localize s t or age s truc tures in cells . Pro t ein bodies, some co nt a ini ng phytin inc lu sions , were l oca li zed in the embryos of five Prosopi s s peci es . Prosopis chilensis wa s the only one …

Gametogenesis En Chthonerpeton Indistinctum (Gymnophiona: Typhlonectidae), Rafael O. De Sá, Nibia Berois

Biology Faculty Publications

RESUMEN:

Histológicamente, las gónadas de Chthonerpeton indistinctum son similares a las ya descritas para otras especies del orden Gymnophiona. Los lóbulos testiculares se hallan compartimentados en unidades estructurales denominadas lóculos. La espermatogénesis ocurre en cistos sincrónicos de células germinales. Durante la espermiogénesis se identifican cuatro estados consecutivos de desarrollo: 1) cistos de espermátidas redondeadas; 2) cistos de espermátidas arrifionadas; 3) cistos de espermátidas bastoniformes y 4) espermátidas en ramillete.

El análisis histológico de los ovarios mostró la presencia de tres estados en la maduración de los folículos ováricos. Estas etapas pueden ser identificadas de acuerdo a: 1) ubicación del folículo …

Wind Dispersal In Californian Desert Plants: Experimental Studies And Conceptual Considerations, Jay C. Maddox, Sherwin Carlquist

Aliso: A Journal of Systematic and Floristic Botany

Because of the important role wind is alleged to have in dispersal of fruits and seeds in desert plants, diaspores were collected for experimental study of 14 species from two Sonoran Desert localities of Imperial Co., California. Field observations on natural dispersal of these species also were made. Although all 14 species were not judged to be primarily adapted to anemochory, tests on air transport capability were made using a calibrated and modified seed-blowing machine. Diaspores were tested individually and results for 20 trials averaged for each experimental condition. In one series of tests, lofting ability was determined. In other …

Experimental Studies On Epizoochorous Dispersal In Californian Plants, Sherwin Carlquist, Quinn Pauly

Aliso: A Journal of Systematic and Floristic Botany

Experiments studying degrees of adherence ability to various surfaces were undertaken with presumably epizoochorous diaspores of 14 native and eight introduced species from southern California. A commonly available laboratory shaker was modified so as to provide a standard means for dislodging diaspores from surfaces. Diaspores were dropped onto a cloth-covered board and percentages of dislodged diaspores recorded after inversion and then after intervals of shaking. Three fabrics were used: a velvet with short pile, an artificial wood with short curly strands, and a furlike fabric with straight strands. Attachment to the velvet was nil for most species, showing that a …

Call For Authors And Subscribers To “Insecta Mundi”

Insecta Mundi

This is the first issue of a new series, Insecta Mundi which has been started for the publication of short papers on insect taxonomy. This first issue of the publication is being mailed to subscribers in January, 1985. It contains, as you can see, a variety of articles, including those on Lepidoptera, Coleoptera, Hymenoptera, and Neuroptera. In keeping with its name, Insects of the World, the areas covered in these papers include not only the United States, but Mexico, the West Indies, Australia, Europe, and Africa.

Review Of Lanelater Of North America (Coleoptera, Elateridae), T. J. Spilman

Insecta Mundi

Descriptions, illustrations, and distributions of adults of 3 species: schottii (=arizonae) from Arizona to southern Texas and northern Mexico; hayekae n. sp. (=schottii of authors) from Kansas to southern Texas; sallei from Louisiana to Florida to New York. Identification key. The larvae, unknown, are undoubtedly predaceous on larvae (grubs) of Scarabaeidae and other soft bodied insects.

Covers Volume 1

Insecta Mundi

Volume 1 Covers

The Effects Of Weathered Crude Oil From The M/T Alvenus Spill On Eggs And Yolk-Sac Larvae Of Red Drum (Sciaenops Ocellatus), George J. Guillen, Dennis Palafox

Gulf and Caribbean Research

The Biitish tanker M/T ALVENUS ran aground 16.1 km south of Cameron, Louisiana, on 30 July 1984. An estimated 10,157 MT of Venezuelan crude oil were spilled into the Gulf of Mexico. Approximately 2,700 MT of the heavy viscous oil impacted beaches and an additional 1,360 MT remained in the subtidal areas of west Galveston Island, about 160 km southwest of the accident site. Red drum, which spawn in the Gulf of Mexico in the fall, could have been seriously impacted by oil concentrations potentially lethal to eggs or larvae. The impact of weathered crude oil on the survival, growth, …

Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Iv. On Nototanoides Trifurcatus Gen. Nov., Sp. Nov., With A Key To The Genera Of The Nototanaidae, Jurgen Sieg, Richard W. Heard

Gulf and Caribbean Research

Nototanoides trifurcatus gen. nov., sp. nov. is described and illustrated from the Gulf of Mexico. Nototanoides differs from the other genera of the family by the male possessing a vestigial maxilliped. It most closely resembles the genera Nototanais and Androtanais. In addition to the differences of the maxillipeds the males of Nototanoides can be separated by the 4-segmented antenna 1 and the females are distinguished by the trifurcate spine on the second segment of the palp of the maxilliped. A key to known genera of the family Nototanaidae is presented.

Ua37/30/2 Wku Research Notecards - D Topics, Lowell Harrison

Faculty/Staff Personal Papers

Notecards created by Lowell Harrison while researching his book Western Kentucky University. The cards transcribed below are for 139 topics beginning with D ranging from Dad's Day to Duplication.

Ua37/30/2 Wku Research Notecards - F Topics, Lowell Harrison

Faculty/Staff Personal Papers

Notecards created by Lowell Harrison while researching his book Western Kentucky University. The cards transcribed below are for 259 topics beginning with F ranging from Faculty - Hunt to Future of Education.

Surgical Sterilization Of Grass Carp (Ctenopharyngodon Idella Val.), David H. Clippinger

Retrospective Theses and Dissertations

In November, 1983, 93 sexually immature and 33 mature grass carp (Ctenopharyngodon idella Val.) were surgically sterilized by clipping the gonaduct or removing a section of the ovaries of testes through a ventral incision between the pelvic girdle and the vent. No mortality occurred from this procedure. After six months (May, 1984), 95.7% of the immature and 100% of the mature grass carp had at least some gonadal tissue regeneration. Fifty-nine percent of the immature fish regenerated a pathway for the eggs or milt to enter the environment. Artificial spawning of the mature female grass carp was 66.7% successful. Over …

Recruitment Patterns In Young French Grunts, Haemulon Flavolineatum (Family Haemulidae), At St. Croix, Virgin Islands., William N. Mcfarland, E. B. Brothers, John C. Ogden, Myra J. Shulman, E. L. Bermingham, N. M. Kotachian-Prentiss

Integrative Biology Faculty and Staff Publications

No abstract provided.

Trends In Genetic And Phenotypic Variances For Milk Production, S. L. Mirande, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Residual standard deviations estimated separately for each year of first freshening from first lactation milk records of artificially sired Holstein cows increased from 1960 to 1982, especially after 1976. The pattern on the square root scale was similar. On the logarithmic scale, residual standard deviations were smallest in the middle of the time period. Heritabilities estimated from paternal half-sib correlations were greater than .30 on all scales until about 1976 when estimates began to go below .20. Estimates were similar for untransformed and transformed records. When records were divided into four herd production groups within each year, the same patterns …

The Nutritional Value Of Normal And High Lysine Corns For Weanling And Growing-Finishing Swine When Fed At Four Lysine Levels, G. L. Asche, A. J. Lewis, E. R. Peo, Jr., J. D. Crenshaw

Department of Animal Science: Faculty Publications

One-hundred-ninety-two weanling pigs from two separate trials, (initial weight 6.0 and 5.6 kg) and 400 growing-finishing pigs (initial weight 17 kg) were fed normal and high lysine corn diets containing four levels of lysine in a 2 • 4 factorial arrangement. Crossbred (Large White • Landrace x Duroc) pigs were used in all experiments. The objectives of the experiments were to (1) compare normal and high lysine corn when fed at different lysine levels, (2) determine the lysine requirements for the three stages of growth and (3) evaluate the effect of protein level on the lysine requirement. All diets were …

Sex Differences In The Recognition Of Infant Facial Expressions Of Emotion: The Primary Caretaker Hypothesis, Raymond B. Hames, Wayne A. Babchuk

Department of Anthropology: Faculty Publications

Although much research has been devoted to studying sex differences In functioning (e.g., Maccoby and Jacklin 1974), most efforts have been directed toward documenting or elucidating the proximate causes of sex differences. Few attempts have been made, however, to explain the ultimate causes of these differences or the selective pressures that have led to the development or psychological differences between males and females [for exception see Symons (1979) and Daly and Wilson (1983)]. Toward this end of blending psychology with evolutionary theory we develop what we call the " primary caretaker hypothesis," which predicts that the sex that through evolutionary …

Heritability Estimates And Adjustment Factors For Yearling Testicular Size In Different Breeds Of Beef Bulls, Donald D. Lunstra, Keith E. Gregory, Larry V. Cundiff

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Little information is available on breed differences and variation in testicular development of young beef bulls. Larger testis size in young bulls is favorably correlated with sperm output, age at puberty, mature testicular size, and pregnancy rate. If testicular size is to be considered in selection programs for young sires, the breed differences, heritabilities, and relationships of testicular measurements to age and body weight must be established for young beef bulls.

The objectives of this study were to measure and define breed differences and variations in testicular size of yearling beef bulls, determine the heritability of yearling testicular size, and …

Biochemical Evidence For Hybridization In Fire Ants, Robert K. Vander Meer, Clifford S. Lofgren, Francisco M. Alvarez

Entomology Papers from Other Sources

Hybridization in social insects has been predicted on a theoretical basis by Pearson (1983); however, it is not a commonly reported phenomenon among ants. We recently found support for this theory when we discovered unique biochemical evidence for hybridization between Solenopsis invicta Buren and Solenopsis richteri Forel, two South American fire ant species that were inadvertently introduced into the southeastern United States.

Equilibrium Moisture Properties Of Corn Cobs, G. M. White, Thomas C. Bridges, Samuel G. Mcneill, Douglas G. Overhults

Biosystems and Agricultural Engineering Faculty Publications

Equilibrium moisture content-equilibrium relative humidity data for broken corn cobs have been determined for both desorption and adsorption conditions for three temperature levels and five moisture levels. The Modified Henderson and Chung equilibrium moisture equations have been fitted to these data by using non-linear regression procedures to estimate equation parameters. Both equations adequately represented the experimental data. A test of varietal differences indicated no significant difference in cob desorption ERH values for three selected corn varieties.

Vasicentric Tracheids As A Drought Survival Mechanism In The Woody Flora Of Southern California And Similar Regions; Review Of Vasicentric Tracheids, Sherwin Carlquist

Aliso: A Journal of Systematic and Floristic Botany

Vasicentric tracheids are defined as tracheids present adjacent to vessels in a wood which also possesses libriform fibers or fiber-tracheids as imperforate tracheary elements. Vasculartracheids would correspond with this definition, but are defined as occurring only in latewood, whereas vasicentric tracheids occur throughout a growth ring or in wood of a diffuse-porous species. V asicentric tracheids offer a subsidiary conducting system which can supply stems and leaves when the vessels to which vasicentric tracheids are adjacent fail because of air embolisms. True tracheids (present as the sole imperforate tracheary element type in the woods in which they occur) have much …

Vegetative Anatomy And Familial Placement Of Tovaria, Sherwin Carlquist

Aliso: A Journal of Systematic and Floristic Botany

Leaf, stem, node, and wood anatomy are examined for Tovaria pendula collections from Peru. Features claimed to separate Tovaria from Capparaceae have hitherto included exstipulate nodes and paracytic stomata. However, the presence of stipules and of anomocytic stomata is demonstrated, together with occurrence of probable myrosin cells in leaves and stems. The nodal type is one reported from Capparaceae. This leaves features of gynoecium and fruit, chiefly, as means of distinguishing Tovaria from Capparaceae: ovary nonstipitate, 6-8 loculate, with axile placentation; fruit a berry; ovules with two nucellus layers; endosperm well developed. These features are considered insufficient to maintain recognition …

1985 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University

Little International "Little I" Agricultural Exposition Catalogs

No abstract provided.

The Vertical Distribution And Feeding Chronology Of Larval Bear Lake Sculpin (Cottus Extensus) In Bear Lake, Utah-Idaho, D. Neverman Devroy, Wayne A. Wurtsbaugh, S. Ohlhorst

Watershed Sciences Faculty Publications

Preliminary sampling in Bear Lake, Utah/Idaho, with bottom trawls and larval fish nets indicate