Digital Commons Network^™

Terrestrial Models: Plant Processes (Version I, Ii, Iii), W. Valentine

Memorandum

No abstract provided.

Terrestrial Models: Animal Processes (Versions I, Ii), S. Payne

Memorandum

No abstract provided.

Sensitivity Analysis, I. Noy-Meir, D. Goodall

Memorandum

No abstract provided.

Aquatic Models, Wayne Minshall

Memorandum

No abstract provided.

Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, Peter L. Comanor

Memorandum

No abstract provided.

Measurements Of Carbon And Nitrogen Changes In Soil, Eugene E. Staffeldt, Kristina Bemond Vogt

Memorandum

No abstract provided.

Prediction Of Plant-, Soil- And Air-Temperature On A Microscale In The Desert, Inge Dirmhirn, Frank Eaton

Memorandum

No abstract provided.

Diest, Food Preference And Reproductive Cycles Of Some Desert Rodents, Russell P. Balda, Clark E. Franz, O.J. Reichman, Kent M. Van De Graaff

Memorandum

No abstract provided.

Consumption, Utilization And Modification Of Nutritional Resources By The Jackrabbit (Lepus Californicus) In The Mohave Desert, V.H. Shoemaker, K.A. Nagy, W.R. Costa

Memorandum

No abstract provided.

Reports Of 1972 Progress - Volume 2: Terrestrial Validation Studies - Methodological And Individual Sites, U.S. International Biological Program

Progress reports

No abstract provided.

Reports Of 1972 Progress, Volume 3: Terrestrial Process Studies, U.S. International Biological Program

Progress reports

No abstract provided.

Systemic Insecticides Effective Against Poplar Tentmaker In Cottonwood Plantations, Jack E. Coster

Faculty Publications

No abstract provided.

Insect Pollination And Seed Set Of Onions (Allium Cepa L.), William P. Nye, N. S. Shasha'a, W. F. Campbell, A. R. Hamson

All PIRU Publications

No abstract provided.

Annual Report 1972-73 And Membership Directory, Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Minutes of the Annual Business Meeting --- 4
Report of the Executive Secretary --- 10
Report of the Treasurer --- 21
Report of the Finance Committee --- 23
Report of the Membership Committee --- 25
Report of the Publications Committee --- 26
Report of the Recognition and Awards Committee --- 27
Report of the Social Implications Committee --- 28
Report of the Student Programs Committee --- 32
Report of the Librarian --- 35
Report of the Articulation Committee --- 36
Constitution, Bylaws, and Articles of Incorporation --- 37
Constitution --- 38
Bylaws --- 42
Restated Articles of Incorporation --- …

Agricultural Experiment Station News January 1973

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR’S DESK
TRAVEL EXPENSES
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - December 1972
BULLETINS PRINTED
ABSTRACTS

Evidence For An Ambidirectional Magnesium-Activated, Sodium-Potassium Dependent Adenosine Triphosphatase, John Dale Hempel

Master's Theses

Controversy exists as to whether the Na-K ATPases of euryhaline fishes are the same enzyme.This study demonstrates that the phosphorylated enzyme from gills of Fundulus heteroclitus adapted to freshwater and salt water migrate to the same position in SDS polyacrylamide gels. Similar behavior of the enzyme from both sources in different ionic media is also shown. Additionally, the possible ability or the enzyme to couple an osmoregulatory influx to an excretory efflux in freshwater fish is demonstrated. The term "ambidirectional" is proposed for this enzyme, and its place in certain membrane models is discussed.

Rapid Alterations In Rat Brain Tryptophan Hydroxylase Activity; Effects Of Adrenal Steroids, Drugs And Stressors, Efrain Charles Azmitia Jr.

Student Theses and Dissertations

Tryptophan (TP) hydroxylase activity was measured using a modification of the method developed by Ichiyama et al. (1968). The distribution of the enzyme in the rat brain was determined and found to correlate with serotonin (5-HT) distribution. Bilateral adrenalectomy resulted in a decrease enzyme activity in most areas examined with the largest drop occurring in the midbrain. A similar decrease was found in 5-HT in vivo turnover. Injection of corticosterone led to an increase both in normal and adrenalectomized rats. This increase was blocked by cycloheximide, a protein synthesis inhibitor. The midbrain enzyme activity was increased in normal rats by …

Studies On The Secretory Process Of Rabbit Parotid, John David Castle

Student Theses and Dissertations

An in vitro incubation system which allows the labeling and isolation of secretion granules - and their subsequent resolution into membrane and content subfractions - has been developed by using dissected lobules of rabbit parotid glands. The system can be used to study a series of aspects related to the last phases of the secretory cycle (concentration, storage, discharge). The work reported in this thesis characterizes the system and presents data concerning the relative rates of synthesis of membrane and content proteins. The dissected lobules can be maintained in vitro in a tissue culture medium for 9 to 10 hr …

Faster Weed Germination With Early Cultivation, Geoffrey A. Pearce

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

The key to cultural control of weeds in cereal crops is an understanding of the factors which govern germination of the weed seeds.

Covering the seed with soil keeps out light, provides a stable moisture supply and makes germination faster than if the seed is left on the soil surface.

Shallow cultivation at the start of the growing season provides the soil cover needed for fast, even germination of weed seeds.

Spray-Graze : The Answer To Weeds In Pastures, Geoffrey A. Pearce

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

W.A. Department of Agriculture research leads to a new technique for weed control in pastures.

The trials which led to the development of the spray-graze technique of weed control started in Western Australia in 1966.

Since 1969, spray-graze has been tried in other States of Australia and is now recognised as the most practical method of controlling many pasture weeds.

Learning To Live With Clover Scorch, A Bokor, D. L. Chatel

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

Recent research has increased our understanding of clover scorch disease in Western Australia.

An economic control has yet to be developed but it appears that management can be adjusted to reduce damage to pastures and there is scope for using resistant species and less susceptible cultivars to escape the disease.

A major research programme is in progress.

The Art And Science Of Plant Breeding, John Sylvester Gladstones

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

The first part of this article described the evolution of crop varieties and their improvement by simple selection. This part discusses cross-breeding and the other techniques which underly most modern plant breeding programmes.

The purpose cf crossing is to generate new combinations of varietal characteristics. It does not create anything basically new. All the genetic "ingredients" of a new variety must be present in one or other of the parents.

Chemicals For Argentine Ant Control, Clee Francis Howard Jenkins, P. N. Forte

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

The Argentine ant is one of the most serious ant pests in the world and as such, has been the subject of large-scale control campaigns in several countries.

Early control measures against the Argentine ant in Western Australia involved quarantine of infected areas and the use of arsenical baits, based mainly on the so-called U.S. Government formula.

Since this time the hunt has been on for a more effective chemical, without undesirable effects.

Lot Feeding Sheep In Sheds, H E. Fels, B. Malcolm

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

The need to gather and hold sheep for slaughter or live shipment led a West Australian company!, with the Department of Agriculture, to investigate the use of sheds for short term lot feeding of sheep. Preliminary examination suggested that feedlot sheds connected by a sheep footpath to the abattoirs, railway or saleyards could be cheaper as well as more practicable than continued use of holding paddocks.

The first week or two are commonly the most difficult in lot feeding sheep or cattle. Long-term indoor lot-feeding is a normal practice in some overseas countries but we did not know whether untrained …

Nitrogen For Pastures, Department Of Agriculture, Western Australia

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

The use of nitrogen (N) fertilisers on cereals has long been recognised and accepted as an economic farm practice. It is only more recently that the use of fertiliser nitrogen has been considered for pasture and fodder production, mainly on wholemilk and butterfat farms in the South-West. The high quality feed produced may be substituted for concentrates or conserved fodder. Large increases in seasonal production have been reported.

Because nitrogen fertiliser is expensive, has a short-term effect, and can affect the clover content of pastures, a series of field experiments were conducted in 1973 to examine the role of nitrogen …

Clover Disease : What Do We Know And What Can We Do, T Marshall

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

A review of 30 years' study and practical experience of clover disease in Western Australia—and a summary of current recommendations for reducing problems in sheep grazing pastures based on oestrogenic subterranean clover.

Some Effects Of Hurricanes On The Terrestrial Biota, With Special Reference To Camille (Reprint), Gordon Gunter, Lionel N. Eleuterius

Gulf and Caribbean Research

This is a verbatim reprinting of the paper with the same title published in Volume 3, Number 2 of this journal, which was so improperly laid out that reprints with the plates could not be made and the legends were missing.

Protozoan Symbionts From The Anemone Bunodosoma Cavernata From Galveston Island, Texas, Philip J. Phillips

Gulf and Caribbean Research

The anemone Bunodosoma cavernata is a common inhabitant of the Texas coast and cursory observation revealed a large complement of protozoan associates. These included Saprodinium, Euplotes, Paraeuplotes, Vorticella, Cohnilembus, Anophrys, Uronema and Vahlkampfia.

Approximately forty anemones were collected from jetty rocks on Galveston Island on 3 November 1970. Note was made within one day of protozoans found on the external surfaces, in the coelenteron and in surrounding sea water. The anemones were kept until 7 December 1970 under varying conditions and bi-weekly note was made of the associated protozoan fauna.

Some Analyses Of Twentieth Century Landing Statistics Of Marine Shrimp Of The South Atlantic And Gulf States Of The United States, Gordon Gunter, Katherine Mcgraw

Gulf and Caribbean Research

There is a strong correlation between the total catch of white and brown shrimp with dockside prices on the United States Gulf Coast since 1902, but there is no significant correlation between South Atlantic production and prices, probably because the South Atlantic shrimp stocks have been over-fished since the 1920s. There is no negative or positive correlation between the catch statistics of brown and white shrimp of the United States, and these species seem to be weakly competitive, if at all. There is a significant correlation between the annual production of South Atlantic and Gulf white shrimp, but there is …

An Examination Of Legislation For The Protection Of The Wetlands Of The Atlantic And Gulf Coast States, Anthony J. Haueisen

Gulf and Caribbean Research

The most useful aquatic areas in the world are in serious danger of destruction. The estuaries, where fresh water, land and sea meet in a dynamic and highly productive zone, are today gravely threatened through unwise and unplanned excessive use of their valuable but finite capacities. Estuaries include the coastal zone which is affected by both the run-off of fresh water from the land and the salt water from the sea. This zone includes tidal rivers, marshes, bays and river mouths. The value of these estuarine regions has been well established by biologists. However, this value is fully appreciated by …