A study of rehabilitation counselors: Locus of control and attitudes toward the poor.

Studied the interrelationships among locus of control, attitudes toward the poor, attitudes toward the supervisor, job satisfaction, and the performance ratings of 90 practicing rehabilitation counselors (mean age 36 yrs). Ss were surveyed with a battery of attitude questionnaires, including Rotter's Internal-External Locus of Control Scale and the MacDonald Poverty Scale. Results indicate that Ss with an internal orientation had more positive attitudes toward the poor than Ss with an external orientation. It was further observed that internally oriented Ss received higher performance ratings than the externally oriented. Internal orientation was associated with higher job morale, greater job satisfaction, and more positive attitudes toward supervisors. Implications of the findings are discussed in the context of client-counselor relationships and of the consequence that these data may have in counselor preservice and inservice training. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Pesticide residues in eggs and chicks from laying hens fed low levels of several chlorinated hydrocarbon pesticides

Eighty-four Single-Comb While Leghorn laying hens housed individually in laying cages were fed rations containing less than 0.1 p.p.m. of dieldrin, DDT, heptachlor and mirex individually or in combination for 7 days and in combination for 15 weeks. DDT residues in egg yolk reached 0.043 p.p.m. by 7 days when fed in combination with the other pesticides. None of the residues were above FDA action level at 7 days and all had declined to below trace levels by 8 weeks after termination of pesticide feeding. Residues in eggs from hens fed all four pesticides for 15 weeks increased steadily for the first few weeks and then reached a plateau or increased only slightly until pesticide feeding was terminated. By the end of the 5th week of pesticide feeding all pesticides except DDT had exceeded FDA action levels for pesticides in eggs. DDT residues reached a level of 0.139 p.p.m. by 8 weeks and did not increase thereafter. Traces of the pesticides were still present 24 weeks after termination of pesticide feeding. The pesticides tested did not affect fertility of hatchability of eggs collected during the 14th and 15th weeks of pesticide feeding. Total carcass fat of chicks hatched from these eggs had 0.024 p.p.m. dieldrin, .049 p.p.m. DDT, .001 p.p.m. heptachlor epoxide and, 0.47 mirex at 1 day of age.     

Diabetes in pregnancy

Diabetes, while at one time a rarity in pregnancy, is now one of the more common medical problems encountered by the obstetrician. Immaculate control is essential and can only be accomplished by close co-operation between the patient and all her medical attendants. The patient can then anticipate an almost trouble free pregnancy and should deliver a baby of normal weight with none of the usual stigmata associated with babies of diabetic mothers.     

Activities of thyroid hormones and related compounds in an in vitro thymocyte assay

Prior studies have demonstrated that the thyroid hormones L-triiodothyronine and L-thyroxine stimulate the rapid uptake of 1-amino-cyclopentane-1-carboxylic acid into isolated rat thymocytes. In the present study the effects of several groups of thyroid hormones and structurally related compounds were investigated to determine the structure-function relations required for stimulation of this membrane process. Particular attention was given to (a) analogues with modifications at the oxygen bridge, the phenolic hydroxyl group, and the group at the 3' position of the outer ring, and (b) the steric orientation of the thyroid hormones. The following were found to be important for maximal activity: (a) the L-isomer configuration, (b) the presence of a 4'-hydroxyl group, (c) the presence of one substituent in both the inner and outer rings (3 and 3' positions), (d) the distal orientation of the 3' substituent in the outer ring of L-triiodothyronine, and (e) the lipophilic character of the 3' substituent. Of lesser importance was the presence of halogen atoms, or an oxygen atom in the ether position. Since these structure-function relations seen in thymocytes parallel in many respects those relations seen in whole-animal studies, it is believed that thymocytes will be a useful tool for further studies of thyroid hormones and their analogues.     

The noneffect of a large linear hydrocarbon, squalene, on the phosphatidylcholine packing structure

The interaction of squalene with liposomes and monolayers of dipalmitoyl phosphatidylcholine (DPL) has been studied by differential scanning calorimetry, Raman spectroscopy, and surface potential measurements. Mole ratios of squalene to DPL up to 9 to 1 were studied. In contrast to small, nonpolar molecules, which profoundly influence the structure of lipid bilayers as detected by changes in both their thermodynamic phase transition parameters and membrane fluidity, this large, nonpolar, linear hydrocarbon is devoid of such influences. It is clear from our data that a large nonpolar molecule such as squalene, having no polar group that might anchor it to the aqueous interface, cannot intercalate between the acyl chains either below or above the phase transition of DPL. This behavior is not compatible with models that treat the bilayer interior as a bulk hydrocarbon, and suggests that great caution should be exercised in extrapolating partition coefficients based on bulk hydrocarbon measurements to lipid bilayers.     

On the creep deformation of a thin tube under combined loading

Approximate analyses are briefly described for the creep curvature of a thin constant thickness, circular cross-section cylindrical shell under various loading. The loads are bending moment, internal pressure, and torsion, which may be applied in any combination. It is shown that the results have a certain common feature which allows their presentation in a rather simple but useful form.