Effects of parent Shamo cocks on the histochemical properties of M. iliotibialis lateralis and M. supracoracoideus on their crossbred broilers

Histochemical studies of mammary gland sections obtained from healthy lactating Prim' Holstein cows contained numerous corpora amylacea, mainly located in active alveoli. Observations by electron microscopy revealed a cauliflower shape, with a fibrillar or multilayered organization. Mineral studies confirmed the presence of high calcium levels (12.3% of dry matter) and phosphorus (7.4%) in the corpora amylacea composition. These bodies stained positive to Von Kossa silver nitrate and to Periodic acid-Schiff. However, depending on the gland of origin, corpora amylacea stained positive or negative to Congo red. Histochemical studies seemed, therefore, insufficient to determine the presence or absence of amyloid. The amount of total protein varied by approximately 25%. Immunoblotting and analysis of the amino acid sequence of a peptidic fragment obtained from corpora amylacea gave clear evidence of the occurrence of caseins, beta-lactoglobulin and alpha-lactalbumin. However, the comparison between the amino acid composition of corpora amylacea and those of the main milk proteins indicated the presence of other proteins. Electrophoretic analysis also gave evidence of the presence of several other proteins, i.e. glycoproteins. Therefore, it is probable that corpora amylacea composition is much more complex than previously reported.     

"Auto-imprinting": Effects of prolonged isolation on domestic cocks.

Studied effects of prolonged deprivation of social experience on social and sexual behavior in 8 Rhode Island?×?Wyandotte cocks reared in visual and physical isolation from hatching until 10 mo old and in 8 others until 18 mo old. They were given choice tests with models of stuffed conspecifics of various color and structure, and also tests with live hens. The results, compared with those of a previous study on cocks reared in isolation until maturity (5 mo) and controls reared socially, suggest that an S deprived of social experience can nevertheless perceive stimuli from its own body and can use this information to establish a kind of "auto-imprinting," which leads it to choose a partner resembling itself, normally a conspecific. The main difference observed was that Ss isolated for a long time are incapable of copulating with the objects offered (models or live hens); this seems to be due to a strengthening of the "auto-imprinting" that the Ss established on themselves. The deficits in copulatory behavior, however, were partially reversible. (34 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparative studies on the histochemical properties of M. iliotibialis lateralis from Kumamoto Cochin crossbred roaster and broiler chickens

BACKGROUND: In adults the influence of cleansing preparations on the pH, fat content and hydration of the skin is well documented. Studies in newborn and small infants have not been reported. OBJECTIVE: Our study aimed at examining whether similar effects can be ascertained in infants. METHODS: Infants without skin disease, aged 2 weeks to 16 months, entered an open, controlled and randomized study. Ten infants each had skin washed with tap water (control group), liquid detergent (pH 5.5), compact detergent (pH 5.5) or alkaline soap (pH 9.5). The pH, fat content and hydration were measured before and 10 min after cleansing. Findings were statistically evaluated by parametric covariance analysis. RESULTS: The skin pH increased from an average of 6.60 after cleansing in all groups. The smallest increase (+0.19) was observed in the control group, the largest (+0.45) after washing with alkaline soap. After treatment with liquid or compact detergent, the increase of the pH was only 0.09 higher than for the control group. In comparison to the compact and liquid detergents, the alkaline soap group had a significantly higher increase in pH. The fat content (mean starting value: 4.34 micrograms/cm2) decreased after washing in all groups; the smallest effect was observed in the control group (decrease of 0.93 micrograms/cm2), the highest for the alkaline soap group (decrease of 4.81 micrograms/cm2). In comparison to the compact and liquid detergents, the alkaline soap group had a higher decrease in fat content. This difference was significant for compact detergents. No statistically significant differences were observed for hydration before versus after washing. CONCLUSION: Each cleansing agent, even normal tap water, influences the skin surface. The increase of the skin pH irritates the physiological protective 'acid mantle', changes the composition of the cutaneous bacterial flora and the activity of enzymes in the upper epidermis, which have an acid pH optimum. The dissolution of fat from the skin surface may influence the hydration status leading to a dry and squamous skin.     

Individual differences and their relation to social structure in domestic cats.

Two groups of domesticated cats with established social structures were tested for their response to novel stimuli in a variety of test situations. Clear individual differences in responses were consistent over a series of test sessions and remained stable despite regular environmental changes. Individual differences in behavioral response were not related to object dominance (food competition) or social dominance (freedom of movement in social encounters) unlike similar studies with social animals. No relationship was found in either group between a cat's rank in object dominance and its rank in social dominance. Significant correlations were demonstrated in the individual cat's latency to approach a novel stimulus, behavioral rank in test situations, and attention span in both groups of cats. Comparisons were made between similar studies with wolves, and inferences were drawn about the relationship between individual differences and social structure in social and nonsocial species. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Species differences in the physical and transport properties of airway secretions

Four cases of severe Lepiota poisoning, including three which developed toxic fulminant hepatitis treated by orthotopic hepatic transplantation, are reported here. The toxicity of the Lepiota is discussed as well as the indications for hepatic transplantation in poisonings due to amatoxin-containing mushrooms.     

Olfactory epithelium of the rat. Lectin-mediated histochemical studies

BACKGROUND: Twenty-nine patients with large bulbous and giant aneurysms of the paraclinoid segment of the internal carotid artery (ICA) were operated on, using Dolenc's combined epi- and subdural approach, between 1985 and 1994. Ages ranged from 25 to 79 (83% female; 17% male). METHODS: Proximal control was established in all patients through either an extracranial or petrous carotid exposure. The aneurysm was approached through a wide exposure by removing the anterior clinoid extradural. All but one aneurysm was clipped directly. A saphenous vein graft from the petrous-to-supraclinoid bypass was performed in this remaining case. RESULTS: Surgical morbidity was assessed at 20%. One patient developed a postoperative subdural hematoma and remained severely disabled. Two patients developed permanent third nerve palsy. One patient experienced severe disabling cognitive deficit. One patient died from complications related to a stroke. One patient developed transient diabetes insipidus. Visual outcome, which was assessed separately, was unimproved in 50% of the cases during a follow-up period that averaged 7 years. CONCLUSIONS: With the development of cranial base procedures such as Dolenc's combined epi- and subdural approach, large and giant aneurysms of the paraclinoid segment can be directly clipped with acceptable morbidity, allowing the ICA to remain patent.     

Higher incidence of Gastrospirillum sp. in swine with gastric ulcer of the pars oesophagea

Gastric ulcer in swine is characterized by an area of acid-peptic digestion, occurs usually in the pars oesophagea of the stomach, and has unknown etiopathogenesis. The present work was carried out to investigate the prevalence of the newly described spiral-shaped microorganism Gastrospirillum sp. ("Gastrospirillum suis") in stomachs of abattoir pigs with and without gastric ulcer. Stomachs were removed from 32 consecutive pigs presenting apparently normal mucosa and from 32 additional consecutive pigs presenting frank, chronic gastric ulcer of the pars oesophagea. Fragments of antral, oxyntic, cardiac and pars oesophagea regions were taken from each stomach and processed for histology and for identification of Gastrospirillum sp. in tissue sections. The microorganisms were identified mainly in the mucous layer and in gastric foveolas of the antral and oxyntic mucosa. Forty pigs (62.5%) were positive for Gastrospirillum sp.; among them, 27 (67.5%) had gastric ulcer, and 13 (32.5%) had no ulcer. Twenty-four pigs (37.5%) were negative for Gastrospirillum sp.; among them, five (20.8%) presented with gastric ulcer, and 19 (79.2%) had no ulcer. There was a significant difference between pigs with and without gastric ulcer in regard to the presence of Gastrospirillum sp. (P < 0.01). The spiral-shaped microorganism Gastrospirillum sp. that inhabits the stomach of pigs should be considered a possible factor connected with the etiopathogenesis of swine gastric ulcer.     

Auditory masking-level differences in the cat.

Trained 4 cats to avoid shock by responding to the intermittent occurrence of 1-kHz tone pulses at one ear, while a continual train of noise pulses was simultaneously presented either to the signal ear alone or to both ears. Using the masked threshold levels determined with monaural noise as a reference, the amount of unmasking produced by the addition of noise to the nonsignal ear was measured. Significantly lower tonal detection thresholds were observed when noise equal in intensity to that at the signal ear was added to the nonsignal ear. Additional unmasking occurred when the intensity of the noise at the latter ear was raised to a level 10 db higher than that at the signal ear. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Sex differences in the allocation of pay.

Examined the possibility that relative to males, females perceive less of a connection between their work and monetary rewards. In Study 1, 66 females and 60 males (respondents to an advertisement in a student newspaper) determined either their own pay or the pay of another person. Results support the hypothesis in that females paid themselves less than did males and less than other people (males or females) paid females. Results also suggest that Ss were more generous when they paid females. In Study 2, sex differences in self-pay were examined in 80 1st-, 4th-, 7th-, and 10th-grade Ss. Results replicate those of Study 1, in that at every grade level, females paid themselves less than did males. In addition, the extent to which females allocated pay the way their male counterparts did was highly related to the masculinity of their career goals. (18 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Developmental differences in the attribution of responsibility.

Investigated possible developmental differences in attributions of responsibility and causality for an interpersonal event. The procedure involved 240 male and female students from Grades 1, 3, 6, 8, and 65 college students watching videotaped scenes of a young female actress breaking a chair. Each S saw one scene from a set of 5 scenes, designed to represent F. Heider's (1958) levels of increasingly internal causation. After viewing the videotaped scene, each S was asked to make attributions of causality and "naughtiness" to the chair breaker. It was predicted that overall, Ss' attributions would show effects for Ss' grade, the level of the videotaped event, and the interaction of these 2 factors. These 3 effects were significant for the measure of causality, while for the measure of moral attribution, the 2 main effects were significant and the interaction approached significance (p?     

Age differences in the perception of closure.

This experiment represents an attempt to increase one's general understanding of cognitive functioning in senescence. A comparison is made between the performance of 2 disparate age groups, with mean ages of 26.8 years and 78.1 years, on 2 kinds of perceptual tasks which earlier factorial studies have shown to reflect "the ability to fuse a perceptual field into a single percept" and "flexibility of closure." One group consisted of 16 Ss made up of doctors and nurses, and the other consisted of 16 residents in a home for the aged. They were roughly equated for intelligence. The 2 procedures were a Gestalt Completion Test, adapted by Thurstone from a technique devised by Street, and a Concealed Figures test, adapted by Thurstone from the Gottschaldt Figures Test. The older Ss were distinctly inferior on both tasks. "The over-all results were viewed as reflecting the overly loose or overly rigid cognitive functioning of the aged." 22 references. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Bias in the assessment of gender differences.

Comments on A. H. Eagly's (see record 1995-21141-001) discussion of gender differences in behavior, taking the position that comparisons are actually larger than presented because indices used to gauge these magnitudes have not been corrected for study imperfections or are otherwise inappropriate. The author examines 3 practices that result in leveling bias. (1) The practice of using raw indices of effect size as terminal values, (2) inappropriate effect size measure used when gender differences are examined in the context of a randomized block design, and (3) the practice of setting effect sizes at zero when they are not reported or derivable in a primary study because of statistically nonsignificant results. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Age differences in the acculturation process.

Age differences were assessed in a conceptual model that seeks to explain how acculturation affects psychological well-being among Mexican-Americans. The data were from a national probability sample of 859 persons of Mexican descent. It was hypothesized that low acculturation creates financial stress. Moreover, low acculturation and financial stress were in turn predicted to erode feelings of personal control and self-esteem. Finally, diminished feelings of control and low self-esteem were hypothesized to exert a negative impact on psychological well-being. When data from respondents of all ages were assessed, empirical support was found for all of the hypotheses except the linkage between acculturation and financial stress. However, few age differences emerged in the model. The authors conclude that older Mexican-Americans may not be more vulnerable to the stressors associated with acculturation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Visual depth preferences of the domestic duckling.

Intensively investigated the domestic duckling's depth perception because of its unusual way of life as both a bird and an aquatic animal. Depth perception on the visual cliff, threshold depth, and sensitivity to a wide variety of waterlike conditions were investigated in 486 Giant White Pekin ducklings. While depth perception on the visual cliff was adequate, the Ss plunged off 6-ft heights without hesitation. Overall, monocular depth perception was somewhat inferior to binocular depth perception. Ss had no special sensitivity to waterlike substances. In general, Ss were careless in the presence of depth situations, too careless to survive in other than a flat or watery environment. It is suggested that a possible flocking factor found when Ss were run in pairs may help offset this. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Determinants of individual differences and gender differences in knowledge.

The authors investigated the abilities, self-concept, personality, interest, motivational traits, and other determinants of knowledge across physical sciences/technology, biology/psychology, humanities, and civics domains. Tests and self-report measures were administered to 320 university freshmen. Crystallized intelligence was a better predictor than was fluid intelligence for most knowledge domains. Gender differences favoring men were found for most knowledge domains. Accounting for intelligence reduced the gender influence in predicting knowledge differences. Inclusion of notability predictors further reduced the variance accounted for by gender. Analysis of Advanced Placement test scores largely supported the results of the knowledge tests. Results are consistent with theoretical predictions that development of intellect as knowledge results from investment of cognitive resources, which, in turn, is affected by a small set of trait complexes. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The nature of the spondylolytic defect. Demonstration of a communicating synovial pseudarthrosis in the pars interarticularis

The in vitro effects of angiotensin II (Ang II) in human vessels are not well studied. The development of specific Ang II-receptor antagonists has made it possible to delineate more carefully the receptor mechanisms involved. The objective of this study was twofold: to investigate the effect of Ang II on human coronary arteries and to study the effects of angiotensin II type 1 receptor blockade with losartan. The setting was contractile experiments with ring segments of coronary arteries. We observed that Ang II is a vasoconstrictor of human coronary arteries, with a pEC50 value of 9.26 +/- 0.22 and Emax of 68.7 +/- 9.61% of potassium-induced contraction. Losartan (10-100 nM) shifted the concentration-response curve of Ang II to the right, with pEC50 values of 7.64 +/- 0.10 and 7.00 +/- 0.15, respectively (p = 0.001), demonstrating the antagonistic properties of losartan. We also noted a decreased maximal response to Ang II after incubation of losartan, with Emax of 51.1 +/- 7.08% and 41.9 +/- 4.70% (p = 0.05), respectively. In conclusion, this is the first report describing the contractile effect of Ang II and the antagonizing effects of losartan in isolated human coronary arteries.