The workability of fresh Portland cement (PC) concrete critically depends on the reaction cubic tricalcium aluminate (C3A) phase in Ca- and S-rich pH >12 aqueous solution, yet its rate-controlling mechanism is poorly understood. In this article, role adsorption phenomena C3A dissolution Ca-, S-, polynaphthalene sulfonate (PNS)-containing solutions analyzed. zeta potential results are consistent with isoelectric point occurring at ∼12 do not show an inversion electric double layer as a...

Using ground granulated blast-furnace slag (GGBS) under different alkaline conditions, we studied the mechanisms and extents of Cr(VI) reduction sorption compared them to reactions with Portland cement (PC). We also investigated effects mixing PC/GGBS ratios on dissolution after carbonating substrates. observed a complete Cr(III) in GGBS-in-Ca(OH)₂ solution (pH > ~12.5) 10 h, whereas distilled water = ~11.5) GGBS exhibited only marginal (20%). Cr dissolved ions supernatants derived from...

Monosulfoaluminate (Ca₄Al₂(SO₄)(OH)12∙6H₂O) plays an important role in anion binding Portland cement by exchanging its original interlayer ions (SO₄2- and OH-) with chloride ions. In this study, scanning transmission X-ray microscope (STXM), absorption near edge structure (XANES) spectroscopy, diffraction (XRD) were used to investigate the phase change of monosulfoaluminate due interaction Pure was synthesized powder samples suspended 0, 0.1, 1, 3, 5 M NaCl solutions for seven days. At low...

Given the role of Se as both an environmental contaminant and a micronutrient, microbial reduction subsequent sequestration bioavailable in soils are great ecological interest. Primary particles surface typically bound into loosely packed, microporous aggregates, which may be critical spatial units determining fate soils. Surrounded by macropores where preferential flow rapidly advects dissolved compounds, soil aggregates domains slow diffusive transport variations chemical concentrations...

Purpose: This study was designed to explore the influencing factors on self-directed learning ability of nursing students and investigate relationship between style, attitude, ability. Methods: The sample composed 263 students. Data were collected from March 8th April 7th, 2011 using a questionnaire which included Kolb's style inventory, attitude inventory. Results: Learning styles subjects assimilator 33.8%, converger 31.9%, accommodator 24.7%, diverger 9.5%. There no significant difference...

Purpose: This study was to describe the perception of biomedical ethics in 210 nurses working at a hospital Busan. Method: Data were collected from September 1st 9th, 2008 using 4-point Likert scale which designed by Kwon. Results: The average score <TEX>$2.88{\pm}0.22$</TEX>. highest score, <TEX>$3.13{\pm}0.35$</TEX>, seen category for right life, lowest, <TEX>$2.49{\pm}0.33$</TEX>, death. There no significant difference according marital status, participation religious activity or career...

Infertility is an emerging socioeconomic issue affecting individual's life and the nation. However, only few studies have examined influence of resilience on quality (QoL) spouses as actors partners. Hence, this study aimed to analyze resilience, a positive factor that infertile couples may have, QoL using actor-partner interdependence model (APIM).By analyses couples' data, we analyzed effect This cross-sectional included 150 couples. The Fertility Quality Life Resilience Scale was used...

Costa Rica is widely regarded as a global leader in conservation practices. In the Maquenque National Wildlife Refuge (MNWLR), within Rica’s Northern Zone, strong commitment to has led protecting highly biodiverse mature forests. However, significant opportunity strengthen this region being overlooked at great cost local community and environment: protection of regenerating secondary Secondary forests account for over 50% tropical serve vital ecological cultural functions. Within MNWLR, many...

Abstract Background: Overcoming resistance to endocrine therapy in advanced breast cancer (ABC) is a major challenge, and there remains an unmet need for safe efficacious treatment options. AKT pathway activation implicated cyclin-dependent kinase 4/6 (CDK4/6) inhibitors patients with hormone receptor-positive/human epidermal growth factor receptor 2-negative (HR+/HER2–) ABC. In the Phase 3 CAPItello-291 study, capivasertib (a potent inhibitor of all three isoforms) plus fulvestrant...

This study was conducted to develop a simulation-based postpartum care education program for women with hemorrhage and verify the effects of on care.

Purpose: The purpose of this study was to investigate the aging anxiety, factors successful aging, and preparation for in early late middle-aged people. Methods: subjects were 140 people aged from 40 59. Data collected using a self-administered questionnaire August 16 September 30, 2013. data analyzed with descriptive statistics, t-test, <TEX>${\chi}^2$</TEX>-test Pearson correlation coefficient IBM SPSS 21.0 program. Results: Between middle age, there statistically significant differences...

The purpose of this study was to determine the effects smartphone apps applying BodyThink program on BMI, percentage body fat, skeletal muscle rate, image, and self-esteem adolescent girls.Sixty-eight high school girls with a BMI over 25kg/m² were recruited participate in study. Girls from four schools divided into two groups: experimental group, which used program, control small group counseling. received 6 times, scheduled once week, each session lasting 40~50 minutes. Test measures...

Purpose: The purpose of this study was to identify the effects visiting exercise program and telecoaching for physical activity promotion on fitness such as grip strength, static equilibrium, dynamic equilibrium quality life in frail elderly who are receiving home nursing care. Methods: subjects were 25 control group, 27 experimental group A (visiting exercise) 29 B with telecoaching). carried out 14 times 24 weeks. collected data analyzed by x 2 test ANOVA using SPSS/WIN 17.0 program....

Depression among childless middle-aged and elderly people is a serious social problem in Korea. However, few studies examine the influence of life satisfaction on depression spouses as actors partners. Hence, this study analyzes (a positive factor married couples may have) depression. This cross-sectional employed data to analyze effect partners via actor-partner interdependence model. The Korea Longitudinal Study Aging was investigate 207 couples. Regarding actor effects, wives' (β =...

Purpose: The purpose of this study was to compare sociodemographic characteristics a normal cognitive group and mild impairment group, establish prediction models Mild Cognitive Impairment (MCI). Methods: This secondary data analysis research using from “the 4th Korea Longitudinal Study Ageing” the Employment Information Service. A total 6,405 individuals, including 1,329 individuals with MCI 5,076 abilities, were part study. Based on panel survey items, used 28 variables. methods included...

This study was performed to assess the relationship between puberty timing and psychological health in adolescence. conducted by using raw data from 9 th Korea Risk Behavior Web-based Survey 2013 (KYRBS). Participants were 35,739 adolescent girls middle high school. There statistically significant differences among three groups perceived health, body image happiness. It is conclud- ed that associated with problems. Pro- fessionals working adolescents should consider needs of early maturing girls.