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排序方式: 共有82条查询结果,搜索用时 31 毫秒
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Evaluation of the degree of cure of a coating 总被引:1,自引:0,他引:1
Coating cure is compared using pencil hardness, MEK rubs, and thumb twist test to evaporation rate analysis (ERA). ERA is
rated most objective and reproducible.
Department of Polymer Science, Hattiesburg, MS.
Rockville, MD. 相似文献
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Weekes John R.; Morison Susan J.; Millson William A.; Fettig Doreen M. 《Canadian Metallurgical Quarterly》1995,27(2):187
Compared Millon Clinical Multiaxial Inventory (MCMI) profiles of 203 Caucasian, 59 Native, and 39 Métis adult offenders, (CAOs, NAOs, and MAOFs, respectively). NAOs and MAOFs yielded higher alcohol abuse scores than CAOs. An independent assessment of substance abuse problems performed on a subsample of 219 of these offenders confirmed the pattern of severity of the alcohol problem. The internal consistency of the MCMI for the CAOs and a pooled group of NAOs and MAOFs was uniformly high. Principal components analysis performed on the CAO and combined NAO and MAO groups resulted in similar 4 factor solutions. The appropriateness of the use of the MCMI with NAOs and MAOFs was supported. Issues regarding the use of standard approaches to the psychological assessment of offenders of Aboriginal ancestry are discussed. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
6.
DR Holmes KE Kip W Yeh SF Kelsey KM Detre DO Williams 《Canadian Metallurgical Quarterly》1998,32(3):590-595
Researchers examining clinical decision-making often explored the role of the nurse's experience. In these studies, experience was conceptualized as either the time spent in nursing or the knowledge which came from practice. This paper reports on the conceptualization of the nurse's experience emerging from a grounded theory study describing one decision-making process: 'knowing the patient'. Data included in-depth interview text, participant observation fieldnotes, and documents. Data were analysed using the constant comparative method and open, axial and selective coding techniques. In the analysis, the nurse's experience was conceptually defined as 'the application of that learned from previous practice situations'. Three attributes of the nurse's experience emerged. These included a focus on the patient, confidence in practice, and knowledge of antecedents and consequences of similar patient situations. Each aspect enhanced the individualization of nursing interventions. The findings are related to other investigations in nursing and insights for practice are offered. 相似文献
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Ljerka Prester Jelena Macan Veda Marija Varnai Tatjana Orct Jelena Vukušić Dubravka Kipčić 《Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment》2013,30(3):355-362
Whole Atlantic mackerel (Scomber scombrus), sardine (Sardina pilchardus) and Mediterranean hake (Merluccius merluccius) from the Croatian Adriatic were stored at 22 °C and changes in histamine, putrescine, tyramine and cadaverine levels were monitored in relation to bacterial endotoxin. After 12 h, histamine levels in sardine were above the legal limit of 50 mg kg?1, set by the US Food and Drug Administration, and an increase in putrescine content preceded the increase in histamine. After 24 h, histamine contents in mackerel and sardine reached 1090 ± 101 and 577 ± 275 mg kg?1, respectively, which exceeded the toxic threshold of 500 mg kg?1. At the same time, the putrescine content was also high in both fish (353–420 mg kg?1). The time-course of endotoxin production was similar in all fish species stored at 22 °C. A high correlation was found between endotoxin and histamine, and between endotoxin and putrescine in mackerel and sardine. On the other hand, high endotoxin levels in hake, after 24 h, were associated with the low histamine and putrescine content (40–60 mg kg?1). 相似文献
9.
Dirk Louwers Bert J. Kip Edo Peters Frans Souren Simme Douwe P. Flapper 《Computers & Industrial Engineering》1999,36(4):855
Re-using the huge quantities of carpet waste that are yearly generated has become a must. A facility location–allocation model for the collection, preprocessing and redistribution of carpet waste is presented. This model differs from other mathematical models for supporting the design of the logistic structure of reuse networks among others in a completely free choice of the locations for preprocessing and in explicitly taking into account depreciation costs. Two applications of the model, one in Europe and one in the United States of America, are described. 相似文献
10.
Waleed Al-Shalfan John G. Speer David K. Matlock Kip Findley 《Metallurgical and Materials Transactions A》2006,37(1):207-216
The influence of annealing temperature and time on solute carbon levels was investigated in four ultralow-carbon (ULC) bake-hardenable
steels; two Ti-V ULC steels with different V/C levels and two Ti-Nb ULC steels with different Nb/C levels. Internal-friction
and scanning transmission electron microscopy (STEM) techniques were used to understand the precipitation/dissolution behavior
in the various steels. An effect of annealing time on the carbon Snoek-peak height was observed in both Ti-V steels and in
the Ti-Nb steel having a lower Nb/C ratio. Despite differences between these steels resulting from their composition (and,
thus, carbide solubility) differences, after cold rolling and annealing at different temperatures, the maximum Snoek-peak
height was achieved after annealing for shorter times in each instance, on the order of 1 minute. The highly stabilized Ti-Nb
ULC steel with a higher Nb/C ratio did not show the effect because of the absence of solute carbon. For the Ti-V steels, most
of the precipitates examined using STEM contained both Ti and V. The energy-dispersive X-ray (EDX) analysis indicated that
both the Ti-V steels annealed at 845 °C for 1 minute have greater Ti/V ratios compared to their corresponding Ti-V steels
in the as-received (hot-rolled) condition. This behavior is consistent with dissolution of carbides causing the carbon in
solution to increase, as indicated by a greater carbon Snoek-peak height for both Ti-V steels in the annealed condition. The
reduction in Snoek-peak height at longer annealing times is believed to be associated with segregation to lower-energy defect
sites. 相似文献