Palatograms were made on a group of dentulous individuals who had normal speech and presented a variety of problems as to tooth arrangement, tooth occlusion, arch form, arch size, vault form, and vault height. A comparative analysis of the palatograms indicated that no two persons contacted exactly the same area in pronouncing a given consonant, but that sufficient similarity existed to constitute a pattern. The patterns for the s and sh presented an individual similarity and constituted a...
Topics: DTIC Archive, Allen,Leslie R, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB TEX, *PHONETICS, *DENTAL...
A clinical evaluation of the ultrasonic scaling technic was carried out on 240 military subjects. The ultrasonic technic was found to be as effective as the conventional scaling method in the removal of calculus while the conventional oral prophylaxis technic was superior to the ultrasonic method in the removal of stain. Most of the subjects preferred the ultrasonic method of oral prophylaxis over the conventional scaling technic. No statistical difference in tooth sensitivity or tissue trauma...
Topics: DTIC Archive, McCall,Clarence M, Szmyd,Lucian, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB TEX,...
In order to study the mechanics of nourishment during weightlessness, 165 subgravity parabolas were flown in an F-94C aircraft. Twenty-five experimental subjects attempted to drink from an open container, a container fitted with pierced lid and plastic straw, and a plastic squeeze bottle. Observations were made regarding deglutition of solids, including swallowing of both well and poorly masticated boli. Drinking from open containers proved to be more difficult than had been anticipated....
Topics: DTIC Archive, Ward,Julian E, Hawkins,Willard R, Stallings,Herbert D, SCHOOL OF AVIATION MEDICINE...
Observation of 193 subjects, pre- and postflight, failed to reveal any clinical cases of relative hypoglycemia. There were 13 cases in which there was an in-flight drop in blood glucose of over 60 mg. percent; this was found to be correlated with a high carbohydrate-low protein breakfast. Incidental findings demonstrated that the poor social hygiene of many of the pilots studied included not only poor dietary habits but also insufficient sleep and the consumption of alcohol the night before...
Topics: DTIC Archive, Taylor,Ellis R, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB TEX, *EPIDEMIOLOGY,...
The experiment was designed to investigate the effects of (1) knowledge of test vocabulary and (2) practice in responding to spondee words at threshold intensities on the spondee threshold in normal-hearing subjects. Results of this experiment were: (1) practice in responding to spondee words at threshold intensities does not influence the spondee threshold in normal-hearing subjects, and (2) normal-hearing subjects given prior knowledge of the test vocabulary yield spondee thresholds 4 to 5 db...
Topics: DTIC Archive, Tillman,Tom W, Jerger,James F, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB TEX,...
Twelve healthy male subjects were stimulated with three rubber bands over a three-hour period and 36 consecutive five-minute whole saliva samples were collected. Flame photometric determinations of sodium and potassium were carried out, the ratio ot these two variables, Na/K, was calculated and statistical analyses were performed on the data. By collecting and analyzing 40 consecutive small samples from individuals, it was shown that the electrolytes, sodium, potassium, and chloride, are not...
Topics: DTIC Archive, Shannon,Ira L, Prigmore,John R, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB TEX,...
The effect of pilocarpine dosage on submaxillary gland sodium and potassium was determined in three separate experiments utilizing Wistar rats, cotton rats, and chinchillas. Mean sodium levels were in all instances significantly higher in the treated animals than in the controls while the reverse held true for gland potassium content. The Na/K ratio was consistently higher in the pilocarpine-treated groups. These results suggest that the source of sodium for the functioning gland greatly...
Topics: DTIC Archive, Shannon,Ira L, Brooks,Robert A, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB TEX,...
Dental gold alloys of various kinds were used to cast inlays which were placed in the molars of 10 small primates. These primates were then exposed to the neutron flux of an atomic detonation. The inlays were removed and the neutron-induced activity of the gold was measured in a scintillation counter. Calculation of the total activity showed a correlation with the neutron dosages received by the primates.
Topics: DTIC Archive, Zellmer,Robert W, Hartley,Jack L, Richey,Everett O, Harris,Norman O, SCHOOL OF...
Amino acid excretion was studied in young, healthy men during summer, fall, and winter months in a location in southwestern United States. Both random and timed urine samples were employed. The amino acids determined were alanine, arginine, cysteine, glutaminetaminetaminetamic acid, glu glycine, histidine, lysine, methyl histidine, serine, threonine, and valine. Supplemental determinations included urine volume, creatinine, uric acid, urea, sodium, and potassium. Using random samples, and...
Topics: DTIC Archive, Hale,Henry B, Ellis,James P , Jr, Van Fossan ,Donald D, SCHOOL OF AVIATION MEDICINE...
Linodoxine was added to the diet of 6 dogs fed excess fat, cholesterol, and propylthiouracil over a 9- to 11-week period. Administration of this drug mixture was associated with significantly (P less than .05) decreased concentrations of aortal cholesterol as compared to a simultaneously maintained group of dogs fed the same diet containing a placebo mixture of coconut oil in place of Linodoxine. Linodoxine was also associated with a significant shift of serum beta-lipoproteins toward classes...
Topics: DTIC Archive, Milch,Lawrence J, Robinson,Lesly G, Wilson,Sherman S, Wilson,Fredrick H , Jr, SCHOOL...
Evidence is presented that erythrocytes adsorb urokinase, a urinary activator of plasma profibrinolysin, and that in the adsorbed state urokinase not only remains active but is 'protected' from factors normally present in plasma. When washed red cells, devoid of components of the fibrinolytic system, are exposed to plasma they acquire simultaneously inhibitors to urokinase and an agent capable of lysing a fibrin clot. Evidence is presented that these acquired properties are the result of...
Topics: DTIC Archive, Kolmen,S N, Guest,M Mason, Celander,D R, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB...
The toxicity and patholgic effects of S,2-aminoethylisothiuronium dibromide (AET-DiBr), a radioprotectant compound, have been studied in rats. The compound is highly toxic to these rodents when given in acute doses either orally or intraperitoneally. The chronic toxicity and pathology of AET-DiBr has been examined by means of serial intraperitoneal injections. At low doses, large total amounts of the drug can be tolerated. The acute and chronic effects of sodium chloride, sodium bromide, sodium...
Topics: DTIC Archive, Melville,George S , Jr, Leffingwell,Thomas P, SCHOOL OF AVIATION MEDICINE RANDOLPH...
The rare-earth mixture didymium (as the nitrate) was administered to rats intraperitoneally, subcutaneously, and in wound implantation. Mortality and clinical sequelae were observed. When groups of these animals were subjected to 800 r of Co60 gamma irradiation, mortality was increased in all treatment groups. This increase was statistically significant in the intraperitoneal experiment and the COmbined effect appears to be synergistic. (Author)
Topics: DTIC Archive, Melville,George S , Jr, Leffingwell,Thomas P, Hartwig,Quentin L, SCHOOL OF AVIATION...
Eight rhesus monkeys were trained to choose the intermediate of three different size stimuli. During transposition testing, stimuli were employed which favored no single choice based on 'absolute' stimulus values. When response eliciting values dependent on 'absolute' stimulus properties were balanced in this manner, sophisticated rhesus monkeys were observed to base responses on 'relational' properties of the test stimuli. (Author)
Topics: DTIC Archive, Gentry,George, Overall,John E, Brown,W Lynn, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB...
Nine rhesus monkeys were successively trained and tested on two intermediate-size transposition problems. In problem I responses based on 'relative' stimulus properties were opposed to chance behavior determined by 'absolute' stimulus properties, and the subjects indicated significant learning of stimulus relationships. Problem II was designed in such a way that different nonchance behaviors should result from response to 'absolute' and 'relational' stimulus properties, and the subjects...
Topics: DTIC Archive, Brown,W Lynn, Overall,John E, Gentry,George, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB...
Forty-nine rhesus monkeys were divided into two treatment groups of 24 and 25 animals. Two identical stimulus objects were presented at each trial in a Wisconsin General Test Apparatus with reward presented for an equal number of trials on the left and right sides. For one group, the sequence of reward placements contained a positive contingency; for the other group, it contained a negative contingency. The distribution of responses for sophisticated rhesus monkeys was found to depend on the...
Topics: DTIC Archive, Overall,John E, Brown,W Lynn, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB TEX, *DECISION...
Four control and nine chronic whole-body irradiated rhesus monkeys, with previous experience on standardized learning set problems and in the utilization of peripheral cues to procure food rewards, were tested on six four-trial peripheral cue learning set problems per day for 39 days. The results of the experiment were that: (1) The irradiated Ss did not differ significantly from the control Ss with respect to performance on this training. (2) There was no significant interproblem improvement...
Topics: DTIC Archive, McDowell,A A, Brown,W Lynn, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB TEX,...
Parotid gland secretion rate was employed as a means of measuring response elicited by gustatory and masticatory stimuli in humans. A plot of secretory response against its corresponding affector intensity -- bolus volume (masticatory stimuli), or application rate (gustatory stimuli) -- resulted in a curve that fit the equation of Michaelis and Menton. This relationship was expressed mathematically and the maximal response (R maximum) and reflex equilibrium constant (K) for the different...
Topics: DTIC Archive, Chauncey,Howard H, Shannon,Ira L, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB TEX,...
In a study of free 17-hydroxycorticosteroids, measurable levels were consistently found in human parotid fluid. Under the influence of synthetic adrenocortical analogs, altered parotid steroi levels closely paralleled changes evidenced in serum and urine 17-OHCS concentration. These findings suggest that steroid values in parotid fluid can be used as an indicator of adrenocortical status.
Topics: DTIC Archive, Shannon,Ira L, Prigmore,John R, SCHOOL OF AVIATION MEDICINE RANDOLPH AFB TEX,...
Histopathologic and chemical studies were made on teeth of four groups of rats following chronic exposure to varying environments of low (3 C, neutral (24 C), and High (35 C)) temperatures; or to reduced barometric pressure (380 mm. Hg). At these temperatures. Histologic changes were not seen in the ground control or cold groups. Altitude was associated with a disruption ofthe odontoblastic layer and with a loss of polarity. This effect was accentuated by superimposed cold. Heat counteracted...
Topics: DTIC Archive, Harris,Norman O, Meffred,Roy B , Jr, Restivo,Salvatore R, SCHOOL OF AVIATION MEDICINE...
A comparison was made of the morphologic effects of cold, heat, and simulated altitude on adult male rats given exposures of 24 weeks' duration. By the use of covariance analysis it was possible to determine the extent to which organ weights were dependent on body weight and to adjust the values in order to remove influences of body weight. For liver, heart, and kidney, adjusted weights indicated temperature-dependency, while pressure-dependency was established for liver and kidney only....
Topics: DTIC Archive, Hale,Henry B, Mefferd,Roy B , Jr, Vawter,Gordon, Foerster,G Elizabeth,...
The results of continued observation of burro survivors of sublethal doses of total-body gamma-ray irradiation are reported. Five deaths occurred during the observation period of this project, 3.6 years from November 1954 to May 1958. In four decedents cause of death was associated with irradiation experience. The survivors seemed to make an early clinical and hematologic recovery and now appear to enjoy normal health and condition. With two years after irradiation blood elements and weights...
Topics: DTIC Archive, Kuhn,U S G , IIII, Kyner,Roy E, Sasmore,Daniel P, Brown,Daniel G, Cross,Fannie H,...
