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1978

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Articles 1 - 30 of 1119

Full-Text Articles in Life Sciences

Fish Feeding-Habit Studies From Tomales Bay, California, Stephen Robert Karl Dec 1978

Fish Feeding-Habit Studies From Tomales Bay, California, Stephen Robert Karl

University of the Pacific Theses and Dissertations

The Bat Ray, Myliobatis californica Gill, occurs from Oregon to the Gulf of California and is common in California bays during the spring and summer. MacGinitie (1935) observed that during its feeding activities, the Bat Ray can dig channels up to 1 meter wide, 50 cm deep and 4.5 meters long in benthic substrates. In intertidal sand flats in Tomales Bay, California, circular pits up to 1 meter in diameter and 20 cm in depth are made by Bat Rays in late summer. In some areas over 50% of the sand flat surface is covered with Bat Ray pits ...


Neotoma Phenax, J. Knox Jones Jr., Hugh H. Genoways Dec 1978

Neotoma Phenax, J. Knox Jones Jr., Hugh H. Genoways

Mammalogy Papers: University of Nebraska State Museum

Neotoma phenax (Merriam, 1903)
Sonoran Woodrat


Revision Of The Antillean Bats Of The Genus Brachyphylla (Mammalia: Phyllostomatidae), Pierre Swanepoel, Hugh H. Genoways Dec 1978

Revision Of The Antillean Bats Of The Genus Brachyphylla (Mammalia: Phyllostomatidae), Pierre Swanepoel, Hugh H. Genoways

Mammalogy Papers: University of Nebraska State Museum

Nongeographic and geographic variation have been analyzed in the genus Brachyphylla. which belongs to the Antillean endemic subfamily Phyllonycterinae of the family Phylloslomatidae. Males were found to be generally larger than females: therefore, the sexes were analyzed separately for geographic variation. External measurements except length of forearm were found to displaya high degree of individual variation. They were not used in subsequent analyses. Of cranial measurements, greatest length of skull and condylobasal length showed the least individual variation, whereas palatal length, postorbital breadth (in samples from west of the Mona Passage only), and rostral width at canines showed relatively high ...


Pollen Manipulation And Related Activities And Structures In Bees Of The Family Apidae, Charles D. Michener, Mark L. Winston, Rudolf Jander Dec 1978

Pollen Manipulation And Related Activities And Structures In Bees Of The Family Apidae, Charles D. Michener, Mark L. Winston, Rudolf Jander

Mi

No abstract provided.


Bacteriocin-Like Substances Produced By Rhizobium Japonicum And Other Slow-Growing Rhizobia, D. C. Gross, A. K. Vidaver Dec 1978

Bacteriocin-Like Substances Produced By Rhizobium Japonicum And Other Slow-Growing Rhizobia, D. C. Gross, A. K. Vidaver

Papers in Plant Pathology

Bacteriocin-like substances were commonly produced by slow-growing Rhizobium japonicum and cowpea rhizobia on an L-arabinose medium. Antagonism between strains of R. japonicum was not detected in vitro; however, such strains were often sensitive to some bacteriocins produced by cowpea rhizobia. Inhibitory zones (2 to 8 mm from colony margins), produced by 58 of 66 R. japonicum test strains, were reproducibly detected with Corynebacterium nebraskense as an indicator. Quantitative production was not related to symbiotic properties of effective strains, since nine noninfective strains and one ineffective strain produced bacteriocin. Eight R. japonicum strains that did not produce bacteriocin nevertheless formed effective ...


Whole Issue Nebraska Bird Review (December 1978) 46(4) Dec 1978

Whole Issue Nebraska Bird Review (December 1978) 46(4)

Nebraska Bird Review

Table of Contents

1978 (Fifty-third) Spring Migration and Occurrence Report

Notes ...................86

1978 Fall Field Day ...................86

Index of Volume XXXXVI ...................87

Index of Volume XXXXVI ...................87


Agricultural Experiment Station News December 1978 Dec 1978

Agricultural Experiment Station News December 1978

Agricultural Research Division News & Annual Reports

CONTENTS:
FROM THE DIRECTOR'S DESK - GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - November 1978


Morphology Of An Escherichia Coli Mutant With A Temperature-Dependent Round Cell Shape, Makoto Iwaya, Robert Goldman, Donald J. Tipper, B. Feingold, Jack L. Strominger Dec 1978

Morphology Of An Escherichia Coli Mutant With A Temperature-Dependent Round Cell Shape, Makoto Iwaya, Robert Goldman, Donald J. Tipper, B. Feingold, Jack L. Strominger

Microbiology and Physiological Systems Publications

Mutants of Escherichia coli capable of growing in the presence of 10 microgram of mecillinam per ml were selected after intensive mutagenesis. Of these mutants, 1.4% formed normal, rod-shaped cells at 30 degrees C but grew as spherical cells at 42 degrees C. The phenotype of one of these rod(Ts) mutants was 88% cotransducible with lip (14.3 min), and all lip+ rod(Ts) transductants of a lip recipient had the following characteristics: (i) growth was relatively sensitive to mecillinam at 30 degrees C but relatively resistant to mecillinam at 42 degrees C; (ii) penicillin-binding protein 2 was ...


Effect Of Glyoxylate On The Sensitivity Of Net Photosynthesis To Oxygen (The Warburg Effect) In Tobacco, David J. Oliver Dec 1978

Effect Of Glyoxylate On The Sensitivity Of Net Photosynthesis To Oxygen (The Warburg Effect) In Tobacco, David J. Oliver

David J. Oliver

The addition of glyoxylate to tobacco (Nicotiana tabacum) leaf discs inhibited glycolate synthesis and photorespiration and increased net photosynthetic 14CO2 fixation. This inhibition of photorespiration was investigated further by studying the effect of glyoxylate on the stimulation of photosynthesis that occurs when the atmospheric O2 level was decreased from 21 to 3% (the Warburg effect). The Warburg effect is usually ascribed to the increased glycolate synthesis and metabolism that occurs at higher O2 concentrations. Photosynthesis in control discs increased from 59.1 to 94.7 micromoles of CO2 per gram fresh weight per hour (a 60% increase) when the O2 ...


The 1978 Iowa Corn Yield Test Report, District 1, Kenneth E. Ziegler, C. D. Hutchcroft Dec 1978

The 1978 Iowa Corn Yield Test Report, District 1, Kenneth E. Ziegler, C. D. Hutchcroft

Iowa Corn Yield Tests

Results of the Iowa Corn Yield Test are published to aid Iowa farmers in selecting corn varieties. This is the fifty-ninth consecutive year for the test.


The 1978 Iowa Corn Yield Test Report, District 4, Kenneth E. Ziegler, C. D. Hutchcroft Dec 1978

The 1978 Iowa Corn Yield Test Report, District 4, Kenneth E. Ziegler, C. D. Hutchcroft

Iowa Corn Yield Tests

Results of the Iowa Corn Yield Test are published to aid Iowa farmers in selecting corn varieties. This is the fifty-ninth consecutive year for the test.


The 1978 Iowa Corn Yield Test Report, District 6, Kenneth E. Ziegler, C. D. Hutchcroft Dec 1978

The 1978 Iowa Corn Yield Test Report, District 6, Kenneth E. Ziegler, C. D. Hutchcroft

Iowa Corn Yield Tests

Results of the Iowa Corn Yield Test are published to aid Iowa farmers in selecting corn varieties. This is the fifty-ninth consecutive year for the test.


The 1978 Iowa Corn Yield Test Report, District 2, Kenneth E. Ziegler, C. D. Hutchcroft Dec 1978

The 1978 Iowa Corn Yield Test Report, District 2, Kenneth E. Ziegler, C. D. Hutchcroft

Iowa Corn Yield Tests

Results of the Iowa Corn Yield Test are published to aid Iowa farmers in selecting corn varieties. This is the fifty-ninth consecutive year for the test.


The 1978 Iowa Corn Yield Test Report, District 3, Kenneth E. Ziegler, C. D. Hutchcroft Dec 1978

The 1978 Iowa Corn Yield Test Report, District 3, Kenneth E. Ziegler, C. D. Hutchcroft

Iowa Corn Yield Tests

Results of the Iowa Corn Yield Test are published to aid Iowa farmers in selecting corn varieties. This is the fifty-ninth consecutive year for the test.


The 1978 Iowa Corn Yield Test Report, District 5, Kenneth E. Ziegler, C. D. Hutchcroft Dec 1978

The 1978 Iowa Corn Yield Test Report, District 5, Kenneth E. Ziegler, C. D. Hutchcroft

Iowa Corn Yield Tests

Results of the Iowa Corn Yield Test are published to aid Iowa farmers in selecting corn varieties. This is the fifty-ninth consecutive year for the test.


The 1978 Iowa Corn Yield Test Report, District 7, Kenneth E. Ziegler, C. D. Hutchcroft Dec 1978

The 1978 Iowa Corn Yield Test Report, District 7, Kenneth E. Ziegler, C. D. Hutchcroft

Iowa Corn Yield Tests

Results of the Iowa Corn Yield Test are published to aid Iowa farmers in selecting corn varieties. This is the fifty-ninth consecutive year for the test.


"Controlled Overdrying: Effects On Some Physical Properties Of Fine Paper", John T. Collins Dec 1978

"Controlled Overdrying: Effects On Some Physical Properties Of Fine Paper", John T. Collins

Paper Engineering Senior Theses

The purpose of this study was to determine the effects of certain drying variables on some physical strength properties when these variables were controlled to bring about overdrying conditions. The variables under study were contact time on the dryer can (% moisture) and different percentage hardwood-softwood compositions. From the study it was discovered that overdrying actually increases tensile values but mullen and tear values did indeed decrease.

The object of the following report was to see if there was a decrease, if any, in certain physical properties and to what degree. If overdrying a sheet actually decreases the physical properties by ...


Lichenometric Distribution Of Rhizocarpon Geographicum On Mt. Washington: A Relative Dating Tool., Paul Andrew Mayewski, Peter A. Jeschke Dec 1978

Lichenometric Distribution Of Rhizocarpon Geographicum On Mt. Washington: A Relative Dating Tool., Paul Andrew Mayewski, Peter A. Jeschke

Earth Science Faculty Scholarship

Excerpt from summary, p. 83: In addition to marking the distribution of snowpatches and the relative age of patterned ground features, local departures from the regional lichenometric trend may also be used to define and relatively date: changes in the distribution of soils and vegetation, avalanche deposits, and abrasion of hiking trails. Lichenometric studies will be undertaken in the following year to date more precisely features and events on Mount Washington.


Variables Affecting The Drainage Test, Jeffrey S. Honour Dec 1978

Variables Affecting The Drainage Test, Jeffrey S. Honour

Paper Engineering Senior Theses

Certain variables affecting the Canadian Standard Freeness Test were investigated. Variables investigated included the zeta potential, pH, chemical type, and concentration. Chemicals used were NaCl, CaCl, AlCl , and SnCl, 5H2O on the acid side. Chemicals used on the alkaline side included KCl, K2S4 and K2HPO4.. pH values were 4.5, 5.5, 6.5, 7.5, 8.5, and 9.5. Concentrations used were 1 x 10-3M, 3 x 10-3M, 5 x 10-3M, 7 x 10-3M, 9 x 10-3M, 1.1 X ...


Front Matter Dec 1978

Front Matter

Henry Ford Hospital Medical Journal

No abstract provided.


In Vitro And Clinical Studies Of Cefaclor, A New Cephalosporin, Daria Kiani, Tom Madhavan, Keith Burch, Don Pohlod, Evelyn Fisher, Edward L. Quinn Dec 1978

In Vitro And Clinical Studies Of Cefaclor, A New Cephalosporin, Daria Kiani, Tom Madhavan, Keith Burch, Don Pohlod, Evelyn Fisher, Edward L. Quinn

Henry Ford Hospital Medical Journal

In vitro susceptibility studies of 246 clinical isolates demonstrated that this antibiotic was effective against Group A beta hemolytic streptococci, alpha hemolytic streptococci, S. pneumoniae, both penicillinase producing and nonpenicillinase producing Staphylococci, Klebsiella pneumoniae, and Proteus mirabilis. Cephalothin susceptible E. coii were also susceptible to cefaclor. Pseudomonas aeruginosa, Serratia sp., Enterobacter Sp., and Streptococcus faecalis were uniformly resistant to cefaclor. The efficacy and safety of this antibiotic were studied in 27 patients with urinary tract, soft tissue, and respiratory infections. Patients with urinary tract infections became abacteriuric after 48 hours. Patients with soft tissue infections responded well within the first ...


Seizures And Brain Tumor In Neurologically Intact Adult Patients: Role Of Computerized Tomography (Ct Scan), Jamshid Seifi, Roushdy S. Boulos, Robert D. Teasdall Dec 1978

Seizures And Brain Tumor In Neurologically Intact Adult Patients: Role Of Computerized Tomography (Ct Scan), Jamshid Seifi, Roushdy S. Boulos, Robert D. Teasdall

Henry Ford Hospital Medical Journal

CT scan of 13 patients with adult onset of seizures who were neurologically intact and otherwise asymptomatic revealed a supratentorial mass in all. Significant EEG abnormalities were recorded in five, and the isotope brain scan was positive in eight. In three patients, both studies were normal. Angiograms confirmed the location of tumor, and histology was established following craniotomy. The value of the CT scan as a screening test for detecting brain tumor in this group of seizure patients is evident.


Mixed Connective Tissue Disease And Systemic Lupus Erythematosus In One Family, Michael R. Lubetsky, Howard Duncan Dec 1978

Mixed Connective Tissue Disease And Systemic Lupus Erythematosus In One Family, Michael R. Lubetsky, Howard Duncan

Henry Ford Hospital Medical Journal

A mother with mixed connective tissue disease (MCTD) and a daughter with systemic lupus erythematosus (SLE) were simultaneously diagnosed and treated in August, 1977. Multiple cases of SLE occurring in the same family are not rare, but the frequency with which systemic lupus erythematosus and mixed connective tissue disease occurs in the same family is not known, and the reports are few. This report describes these two cases and suggests that mixed connective tissue disease may be part of the spectrum of systemic lupus erythematosus.


An Ischemic Infarct In Medulla And Cervical Cord, Ezzatollah Shivapour, Gilbert B. Solitare Dec 1978

An Ischemic Infarct In Medulla And Cervical Cord, Ezzatollah Shivapour, Gilbert B. Solitare

Henry Ford Hospital Medical Journal

This report documents an unusual case of an occlusion of the anterior spinal artery of the medulla oblongata. The patient presented with involvement of the left accessory nerve and weakness of ipsilateral extremities. The diagnosis of an ischemic infarct in the distribution of the left proximal portion of the anterior spinal artery was made. Bulbar weakness, quadriplegia, and respiratory arrest developed. Postmortem examination, 23 days after onset, revealed an old infarct in the medulla which appeared as a more recent hemorrhagic infarct throughout the cervical cord.


Bone Erosion In Rheumatoid Arthritis, Howard Duncan, Catharina H. E. Mathews, Michael M. Crouch, A. M. Parfitt Dec 1978

Bone Erosion In Rheumatoid Arthritis, Howard Duncan, Catharina H. E. Mathews, Michael M. Crouch, A. M. Parfitt

Henry Ford Hospital Medical Journal

A histological study of fully mineralized bone sections was made on thirty joints surgically removed from patients with rheumatoid arthritis. The patterns of bone erosion fell into three groups: 1) that due to multinucleated osteoclasts; 2) areas of apparent bone erosion occupied exclusively by mononuclear cells; and 3) changes produced by an osteocyte which could either enlarge the lacuna space in which it resided or demineralize a region of bone in its immediate vicinity. Tissues taken from knee and hip specimens frequently showed all three cellular patterns of bone erosion, while the sections from finger joints rarely container multinucleated osteoclasts ...


Caloric Restriction And Bile Salt Dynamics In Intact And Cholecystectomized Syrian Hamsters, J. Sanfield, W. T. Beher, G. J. Lin, R. Haamen Dec 1978

Caloric Restriction And Bile Salt Dynamics In Intact And Cholecystectomized Syrian Hamsters, J. Sanfield, W. T. Beher, G. J. Lin, R. Haamen

Henry Ford Hospital Medical Journal

In vivo studies of bile salt absorption and distribution using 14C-taurocholate were made in fed and fasted, intact and cholecystectomized Syrian hamsters. There was no significant difference in the rate of ileal 14C-bile salt absorption or the distribution of 14C-bile salts among the compartments of the enterohepatic circulatory system in any of the animals. The results showed that the sphincter of Oddi is patent in fasting, intact and cholecystectomized hamsters. They also suggested that the diminished bile salt pool seen in fasted, cholecystectomized but not in intact hamsters arises from a) a primary, fasting-induced decrease in liver enzyme activity involved ...


Expanded Polytetrafluoroethylene (Ptfe) And External Velour Grafts As Small Artery Substitutes In Dogs, Farouq Samhouri, Luis H. Toledo-Pereyra, Stanley G. Dienst, Roger F. Smith Dec 1978

Expanded Polytetrafluoroethylene (Ptfe) And External Velour Grafts As Small Artery Substitutes In Dogs, Farouq Samhouri, Luis H. Toledo-Pereyra, Stanley G. Dienst, Roger F. Smith

Henry Ford Hospital Medical Journal

This experimental study compared the clinical patency, angiographic appearance, and histology of 4 mm polytetrafluoroethylene (PTFE) and external double velour grafts which were used as external iliac artery substitutes in dogs. At one week there were no significant differences. However, at two months, none of the PTFE grafts were open, whereas six of the seven external double velour grafts were patent (p<0.05). Thus, in this study the 4 mm PTFE grafts are poor substitutes for canine iliac replacement.


Scanning Electron Microscopy Of The Surface Of Human Duodenum In Patients With And Without Duodenal Ulcer Disease, Bernard M. Schuman, Klaus Ritter, John H. L. Watson, Jessica Goodwin Dec 1978

Scanning Electron Microscopy Of The Surface Of Human Duodenum In Patients With And Without Duodenal Ulcer Disease, Bernard M. Schuman, Klaus Ritter, John H. L. Watson, Jessica Goodwin

Henry Ford Hospital Medical Journal

Endoscopic biopsy specimens of normal human duodenum from patients with duodenal ulcer disease were studied by light microscopy and by scanning electron microscopy. For scanning, the tissue was dried by the critical point-drying technique. SEM criteria for both normal and abnormal duodenal surfaces were determined. SEM evidence for the presence of "tuft cells" similar to those found on the surface of rat duodenum was found in both the normal and abnormal human material. Although other reports have described the favorable effects of carbenoxolone sodium treatment on duodenal ulcer disease, our SEM studies of four patients found that this treatment had ...


Back Matter Dec 1978

Back Matter

Henry Ford Hospital Medical Journal

No abstract provided.


Endoscopic Retrograde Cholangiopancreatography At Henry Ford Hospital: 1972-1977, Bernard M. Schuman, Kian H. Wong, R. Salimi, A. N. Adham Dec 1978

Endoscopic Retrograde Cholangiopancreatography At Henry Ford Hospital: 1972-1977, Bernard M. Schuman, Kian H. Wong, R. Salimi, A. N. Adham

Henry Ford Hospital Medical Journal

Between 7972 and /977, 440 patients underwent endoscopic retrograde cholangiopancreatography (FRCP) at Henry Ford Hospital. The procedure was found to be most useful for identifying the site and nature of an extrahepatic obstruction, the diagnosis of pancreatic cancer, and the preoperative evaluation of chronic pancreatitis. One death occurred as a result of cholangitis in a patient with cancer of the pancreas. Review of the data has led us to refine our indications for FRCP. It has been shown to be a valuable technique with a low incidence of complications in evaluating pancreaticobiliary disease. Based on our study, it would be ...