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Northern And Western Corn Rootworms In Minnesota, H. C. Chiang, R. G. Flaskerd

Journal of the Minnesota Academy of Science

The occurrence and population changes of the northern corn rootworm, Diabrotica longicornis (Say), and the western corn rootworm, D. virgifera LeConte, were reviewed on the basis of information assembled at the Department of Agriculture of the State of Minnesota; and the Department of Entomology, Fisheries, and Wildlife and the Extension Entomologist's Office of the University of Minnesota.

The review shows no record of the northern species in Minnesota before 1899, but it appeared between 1899 and 1915. Populations were probably very law until 1932. Sporadic infestations were reported between 1932 and l 953. Progressive increase in infestation from 1954 paralleled …

Aphanizomenon Elenkinii Kissel In Minnesota Lakes, Hibbert Hill

Journal of the Minnesota Academy of Science

Aphanizomenon Elenkinii Kissel., heretofore described only from the Black Sea area of Russia, has been observed during four summers in lakes near Minneapolis, Minn. A description of the Minnesota alga is given. It has features not noted in previous descriptions.

Quantitative Plating Of Gamma-Irradiated Cultures Of A Blue-Green Alga, Michael J. Bazin

Journal of the Minnesota Academy of Science

A method for quantitative recovery of the blue-green alga, Anacystis nidulans, after treatment with gamma rays is described, and data for the survival of the alga after exposure to a gamma source is presented. No conclusions could be drown by applying a "multi-target" model relating dosage to survival. Application of the data lo a revised target-theoretical expression which included the effects of a dose-dependent repair mechanism indicates that such a mechanism is present in A. nidulans. The validity of these dose-response models is discussed.

Pollution And Evolution, David J. Merrell

Journal of the Minnesota Academy of Science

Three examples, industrial melanism in moths, insecticide resistance in insects, and myxomatosis in Australian rabbits, are used to illustrate the concept that evolution may result from tampering with the physical or biotic environment of a species. Hence, concern about the effects of pollution must encompass not only the possibility of extinction but the possibility of evolution. In the case of harmful species, biological or chemical control measures may result in populations more refractory to control than the original untreated populations.

Myxobacterial Columns, Walter Fluegel

Journal of the Minnesota Academy of Science

The soil myxobacterium, Myxococcus fulvus, will produce clavate columns of slime and cells in certain static liquid cultures. The cells protrude from the thicker end of the column like pins in a pincushion. The column's distribution is in an even array. An hypothesis is suggested for the origin of these formations. The columns are not fruiting bodies. Column formation in other fruiting myxobacteria suggests that it is not a unique feature. Only one other fruiting myxobacterium which produced columns has been reported, and that more than two decades ago.

Protein Patterns Of Dragonfly Hemolymph As Shown By Gel Disc Electrophoresis, Myron Anderson, Lee Halgren, Louis Nuti

Journal of the Minnesota Academy of Science

Acrylamide gel disc electrophoresis of the hemolymph of nymphs of the families Libellulidae and Aeschnidae showed a difference in the mobility of their protein components. Simultaneous comparisons of Anax iunius, Aeschna umbrosa, and Libellula pulchella gave clear separation of the species. Changes in protein composition associated with stage of nymphal development and transition from nymph to adult were apparent.

Rest Site Selection By Radio-Tagged Raccoons, Jay H. Schnell

Journal of the Minnesota Academy of Science

Daytime resting sites and behavior of 14 radio-tagged raccoons were studied from April 18 to November 27, 1965, with types and use of the sites, daytime activity and shifts at the sites, and approach movements previous to resting being analyzed. The radio system pinpointed 173 rest sites, 7 4 per cent in swamps, 17 per cent in hollow trees, and 9 per cent in squirrel or bird nests. Use of the rest sites did not correlate with habitat type or size of the home range or with distances which animals traveled during their active nightly period. Behavioral influences in selection …

Waterfowl Production In A Selected Wetland Management Area, Orlo A. Quame, Alfred H. Grewe Jr.

Journal of the Minnesota Academy of Science

This study of a Type 5 Federal Wetland Management Area showed that: (1) production (young remaining on the area to flight stage) in birds per acre was 0.74 in 1967 and 0.57 in 1968; (2) the greatest temporary use of the area was mode by blue-winged teal, 64 being sighted at one time; and (3) artificial loafing structures may increase use of a wetland by breeding ducks.

Phoretic Behavior Of Four Species Of Alkali Bee Mites As Influenced By Season And Host Sex, Earle A. Cross, George E. Bohart

All PIRU Publications

No abstract provided.

The Biology And External Morphology Of Bees With A Synopsis Of The Genera Of North-Western America, W. P. Stephen, George E. Bohart, P. F. Torchio

All PIRU Publications

No abstract provided.

Dolichopodidae (Diptera) And Braconidae (Hymenoptera) Of Curlew Valley, G. F. Knowlton, W.J. Hanson, G.E. Bohart

Memorandum

No abstract provided.

The Nature Of The "Contractile" Protein Isolated From Brain / S. Puszkin, E. Puszkin, D. D. Clarke, And S. Berl. Coll Of Phys. And Surgeons., Columbia Univ., N.Y. 10032, S. Puszkin, E. Puszkin, Donald Dudley Clarke Phd, Soll Berl

Chemistry Faculty Publications

We have described the isolation from brain of a Mg++/Ca++-ATPase resembling muscle actomyosin (Sci. 12 1 1701 1968). Like myofibrils (Perry and Grey 1 Biochem. J. 64, 184, 1956), the ATPase activity isolated from rat and cat brain is dependent upon the cone. of ATP and cation. When the conc. of ATP exceeds that of Mg++ 1 enzyme activity is inhibited. With increasing conc. of Mg++ 1 the optimum conc. of ATP also increases. This does not occur with Ca++ . Polyethylenesulfonate( PS)(I0-6M)causes the splitting of actomyosin into actin and myosin; the Mg++-ATPose activity is correspondingly diminished (Barony and Joisle …

The Dissociative Breakdown Of Negative Ions / By D. D. Clarke, Chemistry Department, Fordham University, New York, 10458, U.S.A. C. A. Coulson, Mathematical Institute, University Of Oxford, Donald Dudley Clarke Phd, C. A. Coulson

Chemistry Faculty Publications

A discussion is given of the process whereby a substituted aromatic molecule captures a slow electron and dissociates. It is shown that the process often goes via two stages. and that the relative symmetries of the electroncapture state and the final dissociation state are very important. Both the sensitivity of the process to changes in the substituent and the existence of an activation energy are explained in the model

Decarboxylation Studies Of Glutamate, Glutamine, And Aspartate From Brain Labelled With [I-14]Acetate, L-[U-14c]-Aspartate, And L-[U-14c]Glutamate / W.J. Nickls And D. D. Clarke Chemistry Department, Fordham University, Bronx, N.Y. And S. Berl Department Of Neurology, College Of Physicians And Surgeons, Columbia University, New York, N.Y., William J. Nicklas, Donald Dudley Clarke Phd, Soll Berl

Chemistry Faculty Publications

Studies in vivo and in vitro of the distribution of label in C-1 of glutamate and glutamine and C-4 of aspartate in the free amino acids of brain were carried out. [1-14C]Acetate was used both in vivo and in vitro and L-[U-14C]aspartate and L-[U-14C]glutamate were used in vitro. (1) The results obtained with labelled acetate and aspartate suggest that CO2 and a 3-carbon acid may exchange at different rates on a CO2-fixing enzyme. (2) The apparent cycling times of both glutamate and glutamine show fast components measured in minutes and slow components measured in hours. (3) With [l-14C]acetate in vitro …

The Ias Bulletin, V3n1, January 1969, Iowa Academy Of Science

IAS Bulletin

"

In this issue:

--- Call for Papers
--- Visiting Scientist Program
--- Speakers' Bureau Directory
--- Special Committee Named
--- State-Wide Articulation Committee Appointed
--- Report fromthe ISTS Short Course Committee
--- Constitution Revision
--- Industrial Support Being Solicited
--- Special Bulletin Going Out to all High School Science Teachers
--- Membership Information
--- Academy Representatives Attend AAAS Convention
--- Proceedings for 1967 and 1968
--- Research Grants Awarded
--- New Section to Appear on the 1969 Program
--- Program Notes from Other Sections
--- Eighty-First Session at Cedar Falls
--- Call for Nominations for Teacher Awards
--- Selected …

Chemical Firebreaks, Geoffrey A. Pearce

Journal of the Department of Agriculture, Western Australia, Series 4

MANY public bodies are making regular use of herbicides to create firebreaks. In Western Australia more than $200,000 is being spent on chemicals each year to protect property from fire.

In many situations where the buildings and property are of great value, the cost of the chemical becomes insignificant.

Promising Results On West Kimberley Pindan Country, A L. Payne

Journal of the Department of Agriculture, Western Australia, Series 4

IN the 22 to 28 inch rainfall belt of the West Kimberley area of Western Australia are extensive areas of what is locally known as "pindan" country.

The term "pindan" refers to a light red or yellow sandy soil type supporting scattered Eucalypts, sparse-dense wattle scrub and grasses such as curly spinifex, ribbon grass and native sorghum.

Growing And Marketing Yates For Profit, Frank Melville

Journal of the Department of Agriculture, Western Australia, Series 4

THE YATES APPLE is a late maturing red variety which because of its good storage qualities enjoyed a prominent place on the late market for many years.

The trees grow and crop well, the only disabilities are insufficient colour under some circumstances, small size fruit and a tendency to shrivel.

All these troubles can be successfully overcome by appropriate management.

Hemolysis By Crotalus Horridus Atricaudatus Venom, Franklin E. Byrd, Bob D. Johnson

Journal of the Arkansas Academy of Science

No abstract provided.

Nitrogen Fertiliser Survey, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

THE DECEMBER, 1968 issue of the "Journal of Agriculture" included, as part of an article on the economics of nitrogen fertiliser use, a lift-out section for farmers to complete and return to the Journal.

In the lift-out, farmers were asked to calculate their fertiliser costs and answer a series of questions about the use of nitrogen on their farms.

Paspalum Vaginatum : For Salty Seepages And Lawns, C V. Malcolm, I. A. F. Laing

Journal of the Department of Agriculture, Western Australia, Series 4

PASPALUM VAGINATUM, aptly termed "sea shore paspalum" has an amazing ability to thrive in wet salty situations. It is also a good lawn grass.

Seed of the grass is not available but it may easily be established by planting pieces.

This article reviews where and how the grass may be used.

Systematic Status Of The Mastiff Bat, Eumops Perotis Renatae Pirlot, 1965, James D. Smith, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

The mastiff bat, Eumops perotis renatae, described by Pirlot in 1966 and later elevated to specific status by the same author is herein regarded as junior synonym of Eumops perotis perotis (Schinz, 1821). Earlier reports of large Eumops from South America are reviewed in light of the present understanding of the relationship between Eumops perotis and E. trurnbulli.

Agricultural Experiment Station News January 1969

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR’S DESK
UNIVERSITY OF NEBRASKA NORTHEAST STATION
PERSONNEL ACTIONS
NEW GRANTS, CONTRACTS AND COOPERATIVE AGREEMENTS
GENERAL NOTES

Honey Plants In Western Australia, F. G. Smith

Bulletins - 3000 - 3999

Successful honey production depends, among other things on a good knowledge of the plants which produce nectar.

Every apiarist needs to know which plants are of importance to honey-bees, where those plants occur, and when they flower. He also needs to know which plants produce nectar which will result in the production of good quality honey, and which produce unpalatable or unmarketable honey. To maintain the strength of his bee colonies he also needs to know which plants produce nutritious pollen.

The object of this bulletin is to provide the basic information on these subjects in the main beekeeping areas …

Wood Formation And The Concept Of Wood Quality, Philip R. Larson

Yale School of the Environment Bulletin Series

No abstract provided.

Cellular Activities During Aging In Mammals, Caleb Ellicott Finch

Student Theses and Dissertations

Although much is known about manifestations of ageing in mammals, the fundamental cause of ageing has remained obscure. Review of a widely scattered literature has demonstrated a histotypic selectivity in the effect of ageing on cell activities. Several recent examples have shown that certain age changes in cell activities can be reversed by transplantation to a young host. Thus, ageing does not appear to diminish the potential for genomic function. The selective and reversible age changes in cell activities are interpreted to be the result of a differential change in gene activity, which appears to be mediated at the supra-cellular …

The Structure And Replication Of Semliki Forest Virus, A Mosquito-Borne Animal Virus, Nicholas Hill Acheson

Student Theses and Dissertations

Semliki Forest virus is a group A arthropod-borne virus which contains RNA and possesses a lipoprotein envelope. It can be transmitted among animals by mosquitoes in which it multiplies, but its natural host is not known. The virus grows to high titer in a number of types of vertebrate cells in culture. The growth of Semliki Forest virus was studied with the electron microscope during a single cycle of viral replication in chick embryo cells. The spherical virus particle consists of a nucleoid, or nucleocapsid, 280 A in diameter, closely wrapped in an envelope which consists of a unit membrane …

The Golgi Complex Of The Hepatocyte: Isolation And Partial Enzomological Characterization, John Herman Ehrenreich

Student Theses and Dissertations

The elements of the Golgi complex of the hepatocyte are characterized by their content of 30-80m osmiophilic particles, which have been identified by others as very low density lipoprotein. The vast majority of such particles in the cell are in the elements of the Golgi complex. Moreover, the number in the complex can be increased still further by acute ethanol intoxication. This light lipoprotein content afforded the opportunity to isolate a purified fraction of Golgi-derived vesicles from the liver cell, since the content itself would make these vesicles lighter than vesicles derived from other intracellular sources (which do not contain …

The Arrangement Of The Disulfide Bonds In A Γg Immunoglobulin Molecule, William Einar Gall

Student Theses and Dissertations

The human γG1 myeloma protein Eu was isolated in pure form, and the protein was characterized to provide data for more detailed structural analyses. The molecular weight of the native molecule was 154,000 ± 8,000, as measured by sedimentation equilibrium. The component light (molecular weight 22,500) and heavy (molecular weight 51,600) chains were isolated in high yield by gel filtration after reduction and alkylation under mild conditions. Amino terminal analyses and the amino acid compositions of the native molecule and its chains indicated that there were two light and two heavy chains per molecule of Eu. Limited digestion of Eu …

Viral Inhibition Of Mammalian Cell Dna Synthesis, William D. Ensminger

Student Theses and Dissertations

Eukaryotic cells replicate their DNA during a defined time period in the interphase between mitoses. Non-proliferating cells are generally found to be blocked in interphase prior to the DNA-synthetic period. It therefore appears that the control of cellular proliferation may be intimately related to regulation of DNA synthesis. Defining the mechanism for the regulation of DNA replication is a central problem in the biology of higher animal cells. The introductory section of this thesis attempts to bring together the currently available evidence into a coherent model for in vivo regulated DNA replication. Animal viruses can be used as tools to …