Studies of elemental distributions within discrete coal macerals: Use of secondary ion mass spectrometry and X-ray photoelectron spectroscopy

Secondary ion mass spectrometry has been used to measure qualitatively the distributions of many trace and minor elements within some well-characterized coal macerals: vitrinite, fusinite and exinite. Complementary information was obtained by using X-ray photoelectron spectroscopy. Within the vitrinite specimens studied, a widely-dispersed largely inorganic aluminosilicate phase was identified, which contained a number of other trace elements. By contrast, within the organic-rich phase of this macerai, titanium was detected in a very even distribution; this suggests that some titanium may be bonded in an organic complex. The fusinite was shown to contain elevated concentrations of calcium, magnesium and fluorine, dispersed over a large portion of the maceral. The high fluorine content could be identified as an organo-fluoro compound using XPS. Exinite was found to contain lower concentrations of most elements, compared to other macerals. The organic composition of this maceral was significantly different from that of surrounding macerals; this could be seen from the enhanced emission of the C₂H₂-secondary ion and images of this ion thus clearly outlined the position of such macerals.     

Effects of Low Temperature on Structural Metals

Numerous alloys are evaluated for their structural usefulness in terms of ductility and notch toughness at cyrogenic temperatures. Alloys being evaluated include those of aluminum, nickel, steel, titanium and magnesium.     

The renal handling of parathyroid hormone. Role of peritubular uptake and glomerular filtration

The mechanisms of uptake of parathyroid hormone (PTH) by the kidney was studied in anesthetized dogs before and after ureteral ligation. During constant infusion of bovine PTH (b-PTH 1-84), the renal arteriovenous (A-V) difference for immunoreactive PTH (i-PTH) was 22+/-2%. After ureteral ligation and no change in renal plasma flow, A-V i-PTH fell to 15+/-1% (P < 0.01), indicating continued and significant uptake of i-PTH at peritubular sites and a lesser role of glomerular filtration (GF) in the renal uptake of i-PTH. Since, under normal conditions, minimal i-PTH appears in the final urine, the contribution of GF and subsequent tubular reabsorption was further examined in isolated perfused dog kidneys before and after inhibition of tubular reabsorption by potassium cyanide. Urinary i-PTH per 100 ml GF rose from 8+/-4 ng/min (control) to 170+/-45 ng/min after potassium cyanide. Thus, i-PTH is normally filtered and reabsorbed by the tubular cells. The physiological role of these two mechanisms of renal PTH uptake was examined by giving single injections of b-PTH 1-84 or synthetic b-PTH 1-34 in the presence of established ureteral ligation. After injection of b-PTH 1-84, renal A-V i-PTH was 20% only while biologically active intact PTH was present (15-20 min). No peritubular uptake of carboxyl terminal PTH fragments was demonstrable. In contrast, after injection of synthetic b-PTH 1-34, renal extraction of N-terminal i-PTH after ureteral ligation (which was 13.4+/-0.6% vs. 19.6+/-0.9% in controls) continued for as long as i-PTH persisted in the circulation. These studies indicate that both GF and peritubular uptake are important mechanisms for renal PTH uptake. Renal uptake of carboxyl terminal fragments of PTH is dependent exclusively upon GF and tubular reabsorption, whereas peritubular uptake can only be demonstrated for biologically active b-PTH 1-84 and synthetic b-PTH 1-34.     

Pulsatile growth hormone and prolactin: effects of (+) butaclamol, a dopamine receptor blocking agent

Growth hormone (rGH) and prolactin (rPRL) secretory profiles were obtained before and after treatment with a dopamine receptor blocking agent, (+) butaclamol, in 10 male rats chronically implanted with right atrial cannulae. Mean rGH plasma concentrations, determined by planimetry, were reduced (202 +/- 20 ng/ml vs. 135 +/- 20ng/ml, P less than .01), but the basic configuration and periodicity of rGH secretory bursts were unaltered. Mean rPRL plasma concentrations were elevated (11.1 +/- 2.1 ng/ml vs 65.5 +/- 8.1 ng/ml, P less than .0005), but rPRL episodic secretion was still apparent. It is concluded that dopaminergic neurons have a minor role in facilitating episodic rGH secretion. Furthermore, persisting episodic rPRL secretion in rats administered a dopamine antagonist suggests that rPRL feedback inhibition does not inactivitate the neural mechanism generating episodic rPRL secretion.     

A cannabinoid with cardiovascular activity but no overt behavioral effects

Abnormal-delta8-tetrahydrocannabinol (ABN-delta8-THC) failed to elicit central nervous system and cardiovascular effects in laboratory animals. Abnormal-cannabidiol (ABN-CBD) was also devoid of overt behavioral effects but produced marked hypotension with only slight bradycardia in anesthesized dogs.     

Review of The behavioral management of anxiety, depression and pain.

Reviews the book, The Behavioral Management of Anxiety, Depression and Pain edited by Park O. Davidson (1976). Every year since 1969 the Banff Conference has assembled outstanding behavioral scientists who discuss and present their data about a topic of major current importance. In addition, the major presenters prepare a chapter for an annual publication hi which relevant literature is reviewed, concepts are developed and each contributor reports on his own current applied programme. The present book, which grew out of the 1975 conference, is about the behavioral assessment and treatment of anxiety, depression, and pain. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Integrated behavior change techniques for problem drinkers in the community.

Evaluated the therapeutic potential of learning techniques in changing abusive drinking patterns and achieving moderation using 80 regularly employed drinkers with intact families, remaining self-esteem, but also alcohol-related problems. The following procedures were studied: videotaped self-confrontation of drunken behavior, aversion training for overconsumption, discrimination training for blood alcohol concentration, alternatives training, behavior counseling, and alcohol education. All the techniques were applied to Group 1 (n?=?23), the last 4 to Group 2 (n?=?19), alcohol education only to Group 3 (n?=?21), and the last 3 to Group 4 (n?=?17). Tests administered included the California Psychological Inventory, the Marlowe-Crowne Social Desirability Scale, and Rotter's Internal–External Locus of Control Scale. During the 1st yr of follow-up, significant decreases in alcohol intake were found for all groups, and the percentage of moderate drinkers changed from 0% to 62.5%. Significant differences between groups were not found. The effects on outcome of a large variance in pretreatment S characteristics such as alcohol intake, the amount of possible change in intake, the program's learning orientation, and blind follow-up are discussed as factors that may partially account for the lack of differential treatment effects. It is concluded that moderation is a more attainable and feasible goal for problem drinkers than for chronic alcoholics. (36 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Some experimental tests of the functional significance of scent-marking by gerbils (Meriones unguiculatus).

Investigated the functional significance of male gerbil scent-marks in 4 experiments with 60 male and female Mongolian gerbils. In Exps I and II, males in a novel test environment marked more, groomed more, and urinated less in the presence of odors of a strange male than in their absence. Female odors elicited male marking more than did male odors. In Exps III and IV, females were selectively less aggressive toward familiar-smelling males in comparison with unfamiliar-smelling males. These results, in conjunction with field observations of related species, call into question the hypothesis that gerbil scent-marks function territorially and instead suggest that the primary targets are adult females. (34 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)