The Effect of Radiation Dosages and UV/EB Radiation on the Properties of Nanocomposite Coatings

The aim of this study was to compare the effects of ultraviolet (UV) and electron beam (EB) radiation on the properties of cured nanocomposite coatings. Surface hardness increased with increasing radiation dosages (number of passes) for all samples. This was due to the increase in crosslinking with increasing radiation dosages. Pendulum hardness, gel content, and thumb twist results were analyzed to choose the appropriate curing dosage for both curing techniques. The selected dosages were then used to cure coatings for scratch and abrasion resistance tests. It was found that the UV curing produced coatings with better abrasion resistance, whereas EB curing was more suitable for producing scratch-resistant coatings.     

Alcohol Increases Reliance on Cues That Signal Acts of Control.

This study examined the effects of alcohol on the ability to execute and inhibit behavior in a context in which preliminary information signaled the likelihood that a response should be executed or suppressed. Adults (N = 24) performed a cued go/no-go task that required quick responses to go targets and suppression of responses to no-go targets. Cue dependency was manipulated by varying the predictive validity of the cues, and performance was tested under 3 doses of alcohol: 0.00 g/kg, 0.45 g/kg, and 0.65 g/kg. Dose-dependent increases in cue dependence were only observed with highly predictive cues. Results suggest that alcohol-induced increases in stimulus control over behavior might be most likely in situations when stimulus control over behavior has already been established. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

"Behavioral Effects of Chemicals in Drinking Water": Correction to Rotton, Tikofsky, and Feldman.

Reports an error in the original article by Rotton et al (Journal of Applied Psychology. Vol 67(2) Apr 1982, 230-238). It was erroneously stated that stock solutions contained 45 g/l and 225 g/l of sodium nitrate in Experiments 1 and 2, respectively. Actual levels were 10 times less (i.e , 4.5 and 22 5 g/l). (The following abstract of this article originally appeared in record 1982-20688-001.) In Exp I, 42 Ss (mean age 30.4 yrs) tracked a moving target and monitored lights after receiving sublingual drops that contained either water, sodium nitrate (4.5, 45, 450, or 4,500 ppm), or sodium fluoride (.1, 1, 10, or 100 ppm). Dosage levels equaled, exceeded, or fell below those of municipal waters. In Exp II, 20 females performed this task after receiving sublingual drops of the same test substances in a repeated measures design; dosage levels equaled or exceeded levels found in municipal waters by 100 or 500 times. Neither type nor amount of chemical affected primary task performance; however, after receiving sublingual drops in Exp I, Ss paid less attention to lights on their right. In Exp II, Ss made more errors and had longer response latencies after they received moderate and very high concentrations of test substances. It is concluded that challenge testing is a safe but effective technique for provoking and studying reactions to chemicals when combined with a sensitive measure of sensorimotor performance. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

APMP制浆工艺优化的实践经验

通过优化APMP的工艺流程,降低了磨浆电耗,提升了浆料质量.在漂白过程中,采用一段预浸漂白和高浓漂白相结合,同时优化化学药品用量,提高了漂白效率,满足纸杯纸生产的要求,降低了制浆成本.     

改性木质素分散剂对褐煤水煤浆流变性的影响

以廉价可再生的改性木质素作为分散剂,研究了宝日希勒褐煤的成浆性能;利用正交试验,考察了煤的配比、浆体温度、改性木质素分散剂用量和pH值对成浆性能的影响;利用单因素试验,研究了pH值、煤的配比、分散剂用量和制浆温度等因素对水煤浆流变性的影响。结果表明,各因素对浆体流变性影响大小顺序为:煤的配比>浆体温度>分散剂用量>pH值;在25℃,煤的配比为30∶20,分散剂用量为0.3%以及pH值=4的优化条件下,该煤成浆的最大浓度达56.1%,与原料木钠相比,改性木质素成浆浓度提高了4.1个百分点。     

Diazepam impairs behavioral inhibition but not delay discounting or risk taking in healthy adults.

There are reports that diazepam can increase, decrease, or have no effect on measures of impulsive behavior, which may be related, in part, to differences among the tasks used to measure impulsivity. This study examined the effects of a relatively high dose of diazepam (20 mg) on 5 measures of impulsive behavior in healthy adult men and women. Volunteers (N = 18) participated in a 2-session double-blind randomized design in which they received 20 mg diazepam or placebo. One hour after ingesting the capsule, participants completed mood questionnaires and several impulsivity tasks to measure subtypes of impulsive behavior, including behavioral inhibition, delay and probability discounting, and risk taking. Diazepam impaired behavioral inhibition but had no effect on measures of discounting or risk taking. These results are discussed in the context of other recent findings suggesting that different behavioral indices of impulsivity are dissociable and governed by separate underlying mechanisms. (PsycINFO Database Record (c) 2010 APA, all rights reserved)