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Genetic Control Of The Metabolism Of O-Hydroxycinnamic Acid Precursors In Melilotus Alba, Francis A. Haskins, T. Kosuge

Department of Agronomy and Horticulture: Faculty Publications

In sweetclover (Melilotus aIba Desr.) the cis and trans isomers of o-hydroxycinnamic acid occur primarily as the respective β-D-glucosides (Rudorf and Schwarze 1958; Kosuge 1961; Haskins and Gorz 1961a; Stoker and Bellis 1962). The review of Brown (1963) summarizes evidence that these glucosides are formed via the following pathway: phenylalanine (formed from shikimic acid) → trans-cinnamic acid → trans-o-hydroxycinnamic acid (o-coumaric acid) trans-β-D-glucosyl-o-hydroxycinnamic acid (o-coumaric acid glucoside) → cis-β-D-glucosyl-o-hydroxycinnamic acid (coumarinic acid glucoside). Sweetclover plants of the Cu Cu genotype contain substantial amounts of both …

Ultraviolet-Induced Isomerization Of Β-D-Glucosyl O-Hydroxycinnamic Acid On Filter Paper, Andris Kleinhofs, Francis A. Haskins, Herman J. Gorz

Department of Agronomy and Horticulture: Faculty Publications

Coumarinic acid glucoside (β-D-glucosyl cis-o-hydroxycinnamic acid) and o-coumaric acid glucoside (β-D-glucosyl &am-o-hydroxycinnamic acid) are readily detected as absorbing areas on filter paper chromatograms exposed to ultraviolet light at wavelengths near 260 mp. Long wavelength ultraviolet radiation is frequently used to detect fluorescent compounds closely related to these two glucosides. The foregoing facts prompted this investigation concerning the influence of both long and short wavelength ultraviolet light on small amounts of coumarinic acid glucoside and o-coumaric acid glucoside, air-dried on filter paper strips. Ultraviolet-induced interconversion of these two isomers in aqueous solutions is well known.

Analysis Of Pesticide Residues By Polarography, Raymond J. Gajan

United States Food and Drug Administration: Publications

Polarography is a rapid, sensitive, and relatively specific technique that can be applied to pesticide residue analysis. The technique should also prove a valuable tool in overall pesticide research, such as monitoring new columns, studying kinetics, identifying and determining metabolites, assaying primary pesticide standards, and conducting stability studies.

Nebraska Bird Review (October 1965) 33(4), Whole Issue

Nebraska Bird Review

Table of Contents

1965 (Fortieth) Spring Migration and Occurrence Report ......................54

Two Unusual Birds Reported ......................65

Correction to 1964 Spring Report ......................65

Honorary Member - Harold J. D. Turner ......................66

Excerpts from Letters ...................... 66

M. A. Carriker, Jr. ...................... 68

A Parasitized Prairie Chicken Nest ......................68

Book Reviews ...................... 69

Index of Volume XXXIII ...................... 70

Diphenylamine-Zinc Chloride As A Chromogenic Agent For The Detection Of A Mixture Of Ddt, Chlordane, And Toxaphene On Thin Layer Chromatograms, Lewis J. Faucheux Jr.

United States Food and Drug Administration: Publications

Diphenylamine-ZnCI, has been evaluated as a chromogenic agent for detection of toxaphene, DDT, and chlordane on Al₂O₃ a thin layer plates. Characteristic colors were obtained for these pesticides; a lower level of about 5 μg was detectable. Color reactions of 34 pesticides at the 20 μg level are presented.

Studies On The Helminth Fauna Of Alaska. Xliii. Strigea Macropharynx Sp. N., A Trematode Parasite Of Falco Rusticolus L., Georges Dubois, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Strigea macropharynx sp. n. (Trematoda : Strigeata, Strigeidae), an intestinal parasite of Falco rusticolus L., is described. Falconiformes harbor two species of Strigea (S. falconis Szidat, 1928, and S. macroconophora,/i> Dubois and Rausch, 1950) with vitellaria terminating near the copulatory bursa. Both differ from the new species in having a pharynx that is smaller than or subequal to the buccal sucker, as well as in other details. In S. elegans Chandler and Rausch, 1947, a parasite of Strigiformes, the eggs are larger, the testes of different form, and the vitellaria extend significantly farther into the region of the copulatory …

Canine Teeth In Two Nebraska Mule Deer, John P. Weigand

Nebraska Game and Parks Commission: Staff Research Publications

During the November 1963 deer hunting season in Nebraska, hunters were required to produce all deer bagged at compulsory check stations. Information regarding species, sex and age of all deer checked was recorded at each station. It was at the North Platte station that the author examined the deer described below. A total of 423 deer, of which 322 were mule deer, were examined at this station.

Paternal Half-Sib Correlations Between Pairs In The Same And Different Herds, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Correlations were computed between first lactation milk records expressed as deviations from herd-mate averages of pairs of Holstein paternal half-sibs in the same and in different herds. These were compared to the comparable daughter-dam regressions. After correcting the daughter-dam regression for environmental correlation and change in variance from the dam to the daughter generation, both the daughter- dam and paternal half-sib estimates of heritability were about .34, which suggests that maternal genetic variance is. unimportant. This estimate is, however, higher than the .25 found from the paternal half-sib estimate from an analysis for variance components.

The comparison of the half-sib …

Changes In Milk Production In Relation To Changes In Feeding And Management Practices In Dairy Herd Improvement Association Herds, J. B. Stone, J. D. Burke, H. R. Ainslie, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

All Holstein herds of over 20 cows which had automated data processed dairy herd improvement association (DHIA) records from Cornell laboratory for two consecutive years from 1960 to 1964 were used to determine production, feeding, and management changes. The average number of herds for the four 2-yr comparisons was 2,688, 60% in New York and the remainder in neighboring states. Results in the two locations agreed. The yearly changes and standard deviations of changes per cow for the New York herds were milk production, + 157 ± 400 kg; grain feeding, + 88 ± 241 kg; succulent forage, + 0.13 …

Change In Variance Components Associated With Milk Records With Time And Increase In Mean Production, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

First-lactation milk records of artificially sired Holstein cows in New York were analyzed by a sire-by-herd variance component analysis separately for each year from 1954 to 1962. The two variables analyzed were 305-day, 2 ×, mature equivalent records and the mature equivalent records expressed as deviations from the average of their herd-mates. The total variance steadily increased with change in time. Most of the increase (r = .97) was accounted for by increase in mean production. The relative increase in the sire component of variance was slightly faster than the increase in residual variance. Thus, heritability estimated from the paternal …

Correlations Among Records Of Unrelated Cows In The Same Herd And The Same And Different Year-Seasons, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Correlations were computed between pairs of first-lactation milk records of unrelated Holstein cows in New York, where the records were made in the same herd and same year-season of freshening, and in the same herd but different year-seasons of freshening. Records were expressed as deviations from herd-mate averages. The average correlation between pairs in the same herd-year-season was .01. The average correlation when the pair of records was made one season apart was .08, and two seasons apart was .06. The pattern of correlations between a pair of records made more than 3 or 2 yr apart appears to be …

Heritability Estimates Of Milk Production With Different Numbers Of Records Per Sire By Herd Subclass, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

The first-lactation milk records of 20,850 artificially sired Holstein cows and their darns were analyzed by a sire-by-herd, variance components model to determine if unequal numbers of records in the filled subclasses had any effect on the paternal half-sib correlation or the daughter-dam regression. The variance components were estimated with the number per subclass held constant at 1, 2, 3, 4, or 5. The records were also analyzed as deviations from herdmate averages. The analysis of deviations with one observation per subclass gave the highest heritability estimate from daughter-dam regression, .40, and the lowest from paternal half-sib correlation, .23. Analyses …

Environmental Correlations In Sire Evaluation, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Correlations were computed among averages of first lactation deviations from herdmate averages of groups of artificially sired daughters of the same Holstein bulls. The groups were constructed by specifying the time interval between animals in the different groups. Comparison of the actual correlations with the expected correlations suggests that environmental correlations are small or nil among artificially sired halfsibs in New York. The correlations between initial and later groups of 20 or 40 daughter records at different time intervals are so close to the expected correlations that there is no support for the view that accuracy of prediction in sire …

Nebraska Bird Review (July 1965) 33(3), Whole Issue

Nebraska Bird Review

Table of Contents

1964 (Seventh) Fall Record Report ...........................34

The Sixty-Fourth Annual Meeting ...........................47

Book Review........................... 48

In Memoriam- Miss Mary A. Towne........................... 48

Mississippi Kite Seen in Fontenelle Forest........................... 49

General Notes ...........................49

Excerpts from Letters ...........................50

Treasurer's Report- 1964 ...........................52

Genetic And Maternal Influence On The First Three Lactations Of Holstein Cows, L. Dale Van Vleck, G. E. Bradford

Department of Animal Science: Faculty Publications

Milk records of up to the first three lactations of artificially sired Holstein daughters and their dams were used to estimate heritability from both daughter-dam regression and paternal half-sib correlation. The within-herd estimates from records expressed as deviations from herd-mate averages were .37, .30, and .24 from daughter-dam regression for the first three lactations ; and the corresponding estimates from half-sib correlation were .24, .21, and .23. These results suggest a large maternal effect in the first lactation, a small amount in the second, and little in the third lactation. Analysis of the records not as deviations gave the same …

Linearity Of Heritability Of Holstein First-Lactation Milk Production, L. Dale Van Vleck, C. L. Hart

Department of Animal Science: Faculty Publications

The regression of daughter on dam first-lactation milk deviations from herd-mate averages was found to be linear from an analysis of 47,400 Holstein pairs. The linear equation was y=-25.6 + .210 (x -27.6) and the quadratic equation was y=-25.6 + .208 (x -27.6) + .0000222 (x²-44131.4) with correlation coefficients, .18258 and .18268, respectively. These results suggest that selection response can be predicted adequately even with very large selection differentials.

Absence Of Dominance Of The B Gene In Influencing Β-Glucosidase Activity In Melilotus Alba, Francis A. Haskins, Herman J. Gorz

Department of Agronomy and Horticulture: Faculty Publications

In sweetclover (Melilotus alba Desr.) the allelic pair designated B/b was originally thought to be concerned with coumarin biosynthesis. Extracts of BB plants were reported to contain substantial amounts of both free and bound coumarin, while extracts of bb plants contained only bound coumarin (Goplen, Greenshields and Baenzinger 1957; Haskins and Gorz 1957), more recently identified as coumarinic acid glucoside (β-D-glucosyl-cis-o-hydroxycinnamic acid) (Kosuge 1961; Stoker and Bellis 1962). The bound-coumarin character behaved as a simple recessive in crosses between bb and BB plants (Goplen, Greenshields and Baenzinger 1957).

Marcelin Berthelot: A Study Of A Scientist's Public Role, Reino Virtanen

University Studies (University of Nebraska) (1888–1984)

The French chemist Marcelin Berthelot won great recognition during his lifetime, but since his death in 1907 he has become little more than a name for the world at large. He was a representative man-representing his time so completely that there remained little for the future to exploit. A man whose manifold accomplishments were so appropriate to the stage then reached by scientific development that nothing was left over-no loose ends, no undigested ideas, no potentialities unrealized. After Claude Bernard and Louis Pasteur, no scientist in France could challenge his eminence until the turn of the century, when other leading …

Nebraska Bird Review (April 1965) 33(2), Whole Issue

Nebraska Bird Review

Table of Contents

A Study of Nesting Dickcissels in Nebraska ......................... 22

Honorary Members-Leroy M. Gates ......................... 25

Miss Doris B. Gates ......................... 26

In Memoriam-Frederick Ira Day ......................... 26

Book Reviews ......................... 27

Wintering Sandhill Cranes in Lincoln County ......................... 28

1964 Christmas Count ......................... 29

Comments ......................... 32

Studies On The Helminth Fauna Of Alaska. Xlii. Aploparaksis Turdi Sp. N., A Hymenolepidid Cestode From Thrushes, Francis S.L. Williamson, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Aploparaksis turdi sp. n. (Cestoda: Hymenolepididae) is described from the robin, Turdus migratorius L., and recorded also from the varied thrush, Ixoreus naevius (Gmelin), from Iliamna Lake, upper Alaska Peninsula. This cestode is distinguished from the three previously known species of Aploparaksis s. l. occurring in passeriform birds by the size and number of rostellar hooks and by the arrangement and proportions of the genital organs. It is concluded that the validity of the genus Monorcholepis Oshmarin, 1961, to which certain of these species have been assigned, is questionable, and the latter genus is considered to be a synonym of …

Production Differences Between Registered Cows And Their Nonregistered Herd-Mates, L. Dale Van Vleck, J. D. Burke

Department of Animal Science: Faculty Publications

Within-herd contemporary comparisons of the first-lactation production of registered and nonregistered cows in herds enrolled in the New York Dairy Herd Improvement Associations suggest only small genetic differences between registered and nonregistered cows. In general, the registered Holsteins exceeded in production their nonregistered herd-mates, whereas the nonregistered cows had a slight advantage over their registered herd-mates for the Ayrshire, Guernsey, and Jersey breeds.

Artificially sired cows had consistently higher production than their naturally sired herd-mates for all breeds. A definite increase in this advantage was noted for Holsteins in more recent years. No trend was apparent in the comparison of …

Biochemical Changes During The Growth Of Fungi: Ii. Ergosterol And Fatty Acids In Penicillium Atrovenetum, David Gottlieb, James L. Van Etten

Department of Plant Pathology: Faculty Publications

Changes in the lipid constituents of Penicillium atrovenetum were studied during the growth and development of this fungus. The stages in development, as measured by the dry weight, were divided into four phases: lag, log, stationary, and death. The total fatty acids on a dry-weight basis increased from a minimum in the spores to a maximum near the end of the log phase of growth. The major fatty acids were palmitic, stearic, oleic, and linoleic. Myristic, pentadecanoic, palmitoleic, heptadecanoic, linolenic, arachidic, and heptadecenoic acids, together with two unidentified components, were also present in the fatty acid fraction. Compared to ungerminated …

Kill And Migration Patterns Of The Seney Goose Flock, Glen A. Sherwood

United States Fish and Wildlife Service: Publications

An intensive investigation into the limiting factors and behavior of the Seney Canada goose (Branta canadensis maxima -- Hanson, 1965) flock was conducted from June, 1962 to August, 1965. A portion of the study findings, concerning kill and migration patterns, is reported here.

The 95,500 acre Seney National Wildlife Refuge is situated in the east-central sector of Michigan's upper peninsula, in the southwest quadrant of land formed by the junction of state highways M-77 and M-28. It is composed of four broad habitat types of which approximately 400 acres are cropland, 26,900 acres upland brush and timber, 61, 000 …

Business In Nebraska #256, January 1966, E. S. Wallace, J. Timothy Wilson, John H. Nixon, Dorothy Switzer

Business in Nebraska

Pattern of Growth in Nebraska (E. S. Wallace)

Within the past year we have published Nebraska data on personal income (March), population (April), retail trade (May), the service business (June), wholesale trade (July), and employment (September). In each of these except the last, city and/or county figures have been presented to depict the changes that have been taking place in different parts of the state. The present article is an attempt to combine these six indicators of economic activity into a composite picture showing the pattern of growth within Nebraska.

Business Summary (J. Timothy Wilson)

In October, the dollar volume …

Robert Henri, Norman Geske

Sheldon Museum of Art: Catalogs and Publications

The present exhibition has been assembled to commemorate the centennial of Robert Henri's birth. It is not intended to be a conventional review of his reputation and accomplishment, which has been established for a long time, but perhaps, instead, it will serve as an initial step in a reassessment of his accomplishment and a belated recognition of those aspects of his work which have not hitherto received anything like the attention they deserve.

The selection of works has been difficult in a special way. Henri was prolific and his work is abundantly represented in public and private collections. At the …

Nebraska Bird Review (January 1965) 33(1), Whole Issue

Nebraska Bird Review

Table of Contents

Bird Records from Northern Nebraska during the Breeding Season...................2

Two Species of Ibis Seen in Nebraska in May, 1964 ...................6

Nesting Report, 1964 ...................9

Scissor-tailed Flycatcher Nesting in Clay County................... 14

Song Sparrow Nesting at Plattsmouth ...................14

A Changed Habitat ...................15

General Notes................... 18

Excerpts from Letters ...................19

Fall Field Day ...................20

Heritability Estimates Of Udder Disease As 5ieasured By Various Tests And Their Relationship To Each Other And To Milk Yield, Age, And Milking Tisies, G. H. Schmidt, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Paternal half-sib heritability estimates oi' milk yield, number of quarters infected with mastitis organisms, and number <>f quarters showing abnormal mill; were obtained from an analysis of milking and mastitis data of 2,865 Holstein cows. The within-herd heritability estimate for daily milk yield was 0.353 and that for the number of quarters infected with Streptococcus agalactiae 0.196. The heritability estimates for the number of quarters infected with organisms other than Streptococcus agalactiae, number of quarters infected, and number of quarters showing abnormal milk were all below 0.1.

Within-herd correlation coefficients were calculated among daily milk yield, milking data, age, …

Luteotropic Properties Of Luteinizing Hormone And Nature Of Oxytocin Induced Luteal Inhibition In Cattle, Lloyd Donaldson, William Hansel, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Fifty-three Holstein heifers were used to study the effects of oxytocin administered alone and in combination with various gonadotropins on the weights and progesterone contents of corpora lutea. Pituitary gonadotropin levels were compared in untreated and oxytocin-treated heifers at three stages of the estrous cycle.

Oxytoein injections on Days 2 through 6 significantly reduced the weights and total progesterone contents but not the progesterone concentrations of glands removed on Day 7. The concurrent administration of either purified bovine luteinizing hormone (LH) or human chorionic gonadotropin (HCG) significantly increased these parameters from the oxytocin treatment levels to normal or supra-normal values. …

Litter Size And Proportion Of Females In The Offspring Of Multiparous Rats With Varying Uterine Metabolic Levels, A. B. Schutz

Department of Animal Science: Faculty Publications

The rate of _TTC reduction by the uterine tissue of rats was determined at specific stages of the oestrous cycle, and in successive cycles at the same stage. Individual females showed a characteristic level of reaction to _TTC. Mothers whose uteri had a high reaction rate with _TTC produced litters with a higher percentage of female pups than did mothers with a low level of reaction. Previous studies have shown that _TTC reduction rate represents a metabolic activity of uterine tissue that is induced by oestrogens.

Statistics In The Design And Analysis Of Physiology Experiments, L. Dale Van Vleck, C. R. Henderson

Department of Animal Science: Faculty Publications

Statistics should be considered as a tool by the animal experimenter in much the same way that a chemical analysis or a radiation counter is used as a tool. Too often statistics is considered as something magical which can restore order out of chaos and perhaps absolve the experimenter from mistakes in logic and procedure. It is true of course that the statistician through his knowledge of statistical procedures can sometimes help salvage some results from an otherwise hopelessly muddled experiment. One point must be made clear at the outset—the statistician is not a tool of the experimenter although statistics …