Effect of Particle Size on the Dissolution Characteristics of Chlorthalidone

The particle size reduction of chlorthalidone by fluid energy milling, Alpine milling and Fitzpatrick milling were evaluated. The desired particle size was achieved by both the fluid energy milling and Alpine milling processes. Alpine mil1ing, however, is a more complex process and is susceptible to product decomposition, whereas fluid energy milling is a simple and efficient process without any risk of product decomposition. The desired particle size cannot be achieved by Fitzmilling because of the low probability of impaction force on particles. The dissolution rate of the chlorthalidone from chlorthalidone/propranolol hydrochloride tablets (25/80 mg) prepared with fluid energy milled chlorthalidone was significantly better than the tablets prepared with Fitzpatrick - milled chlorthalidone. The minimum effective specific surface area of chlorthalidone needed for maximum dissolution in water was found to be around 3.5 m²/g.     

SOME PHYSICAL PROPERTIES OF GLASS TANK BLOCK REFRACTORIES1

Porosity, crushing strength, elasticity, specific gravity, transverse strength, thermal expansion, impact strength, and resistance to heat shock were determined on five glass tank block refractory bodies. Ability to resist heat shock was successfully predicted from the elasticity, transverse strength, thermal diffusivity, and thermal expansion values.     

Patterns of adjustment among children of battered women.

Children exposed to interparental violence have been characterized by an array of psychological problems, but findings regarding the precise nature of these problems have been inconsistent. This study used cluster analysis to determine whether distinct patterns of adjustment could be identified in 228 8- to 14-year-old children residing in battered women's shelters. Five such patterns emerged: multiproblem–externalizing, multiproblem–internalizing, externalizing, mild distress, and no problems reported. This solution was cross-validated in independent halves of the sample and was similar for boys and girls. Differences among the clusters on relevant family and demographic variables were examined, and it was found that the clusters could be distinguished on the basis of the frequency of children's exposure to interparental violence, parent–child aggression, and children's appraisals of interparental conflict. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Racial effects in counseling-like interviews: An experimental analogue.

Examined racial E effects in counseling-like interviews employing the verbal operant-conditioning paradigm. The general objective was to determine whether significant differences in the conditionability of 12 Black and 12 White female college students, as measured by their emission of positive and negative self-reference emotional affect statements, would obtain when the verbal reinforcement was provided by 2 Black and 2 White Es. A postexperimental inquiry assessed Ss' perceptions of the interviews and their level of awareness of the Es' to influence their verbal behavior. While no definitive conclusions were reached, this study demonstrates that the verbal operant-conditioning paradigm can be used to investigate racial effects on verbal behavior in the counseling interview. Through the use of multiple, biracial Es and Ss, this study goes a step further than other verbal operant-conditioning studies that have explored racial E effects. The absence of significant differences in the E-S racial interaction suggests that race, per se, may not be the most important variable in the E-S (or counselor-client) relationship. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Impulsive versus realistic thinking: An examination of the distinction between primary and secondary processes in thought.

The nature of the distinction between primary and secondary processes, as described by Freud, has relevancy for both a cognitive psycholoy and a psychology of motivation. Several issues arising from an examination of the 2 processes are examined. Possible empirical approaches to the basic problems are presented. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

New Algorithms For Two- and Three-Layer Channel Routin

In this paper a number of new channel-routing algorithms are presented. the routing strategy is based on parallel bubble-sorting and river-routing techniques. an important concept introduced is the POTENTIAL function, which serves as a measure of the degree of difficulty of a particular channel-routing problem. Both non-Manhattan wires and overlapping wires are used. Although the methods are initially derived for two-layer routing with two-terminal nets only, extensions to multiterminal nets and three-layer routing have been made. Preliminary results indicate that in many instances the new algorithm outperforms the traditional approaches.     

Physical violence and other forms of marital aggression: Links with children's behavior problems.

Two studies examined whether physical marital violence and other forms of marital aggression (e.g., threats, throwing objects) correlate with children's behavior problems in families marked by recent spousal violence. Study 1 included 55 families seeking marital therapy. Study 2 included 199 families at battered women's shelters. In the marital therapy sample, both physical marital violence and other forms of marital aggression correlated positively with children's externalizing problems. In the women's shelter sample, physical violence and other forms of marital aggression correlated positively with children's externalizing and internalizing problems. After accounting for the frequency of physical marital violence, forms of marital aggression other than physical violence still related to children's externalizing problems in the marital therapy sample and to children's internalizing problems in the women's shelter sample. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The effect of additives on activities in cryolite melts

This paper assembles literature data, mainly vapor pressures and concentration-cell electromotive forces (emf's), from which the variation of activity of NaF and A1F₃ when a third substance is added to Na₃AlF₆ can be deduced. The necessary theory is derived. Where there is more than one source of information on a given substance, the agreement is poor, showing imprecision in the experimental data. Substances are characterized by ∂ In a_{AlF 3}/∂N₃, whereN ₃ is the molar fraction of the additive, and a value of -1 is neutral, since it corresponds to a dilution effect. Positive values show acids; A1F₃ itself has a value of +27.9, while NaF has a value of -27.9. BeF₂ and MgF₂ are strong acids with values of +11, CaF₂ is a weak acid with a value of +2, and LiF, SrF₂, BaF₂, and 1/3(A1₂O₃) are weak bases with values of -2 to -3.     

Review of principal hydrocarbon-bearing basins of the South China Sea area

As a consequence of exploration for hydrocarbons, and of research programs conducted by academic and international institutions, substantial progress has been made in recent years in definition of hydrocarbon bearing basins, and those potentially so, in Southeast Asia and the South China Sea. Basins and depositional provinces now recognized include: the Thai Basin, the Malay Basin, West Natuna and Penyu Basins, Saigon (Ho Chi Minh) and Mekong (Vung Tau) Basins, East Natuna area, the Greater Sarawak Basin including Central Luconia and Balingian depositional provinces, the Baram Delta/Brunei-Sabah Basin and the Northwest Palawan Shelf. Where hydrocarbons have been encountered, the deposits are commonly associated with rocks of mid- and Upper Miocene age. Oligocene and Pliocene occurrences are locally significant.With some exceptions, most sedimentary basin-fill was deposited within continental to coastal environments. Such sediments are commonly gas-prone. Where oil-prone, there are suggestions that the oil has been generated under conditions of greater thermal maturity. Stratigraphic correlation depends largely on recognition of cyclic successions by means of integration of information derived from seismic stratigraphy, and paleontological and environmental analysis. Structures are commonly anticlinal and fault-associated; the anticlines are commonly suspected to have diapiric cores. Major transcurrent faults of regional extent may have been instrumental in formation of depositional provinces and anticlinal trends.