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Synthetic V bearing steelmaking slags with different contents of TiO 2 were solidified from melting temperature of 1530uC. The effect of TiO 2 on the crystallisation temperature and crystal growth of V concentrating phase is clarified by SEM and EDX and analysis of crystal size distribution. Results show that 2?2-4?2 wt-%TiO 2 can lower the crystallisation temperature from 1350 to 1275uC and crystal growth is enhanced but not linearly with the addition of TiO 2 .

The distribution of P in basic oxygen furnace steelmaking slag was investigated together with the enrichment behaviours of P in slowly cooled slag samples modified by SiO 2 from high temperature remelts at 1873 K. The slag microstructures were characterised, and the results showed that only a limited fraction of P 2 O 5 was dispersed in the matrix, whereas a large amount of P 2 O 5 was found to form solid solutions with dicalcium silicate (2CaO.SiO 2 or C 2 S) phase and/or with tricalcium silicate (3CaO.SiO 2 or C 3 S) phase in original industrial slag. It was also found that when the basicity (C/S5CaO/SiO 2 ) of slag modified by SiO 2 was close to 3, the main phase was C 2 S, and most of the P in the modified slag was precipitated from solid solution in the C 2 S. The mechanism of P enrichment is also discussed.

this research investigated the association between prolonged disposable diaper (DD) wearing in infancy and primary enuresis (PNE). As a case-control study, we collected data from 376 children with enuresis and 379 healthy children who were sex-and age-matched at three tertiary care institutions in mainland China from August 2017 to July 2018. The results of adjusted logistic regression showed the odds ratios (95% confidence intervals) for PNE across the categories of age of daytime DD use cessation were as follows: ≥ 25 months: 1.00, 18-24 months: 0.25 (0.17-0.37), and ≤ 17 months: 0.11 (0.06-0.20), independent of age, mother education, residence, toilet training approach, breastfeeding duration, Uti, constipation, anaphylactic disease and family history. After a similar multivariable adjustment, increased age of daytime DD use (per-month) had a positive correlation with PNE, OR = 1.17, 95% CI 1.13-1.20 and non-linear relationship was detected, whose point was 21 months (the effect sizes and the 95%CI on the left and right sides of inflection point were 1.04 (0.99-1.10), P = 0.131 and 1.25 (1.18-1.31), P < 0.001). Subgroup analysis found that the effect of duration of disposable diaper exposure for each additional month, those children had accepted assisted infant toilet training/elimination communication (AITT/EC) practice had a lower risk of PNE (OR = 1.08, 95% CI 1.04-1.12), compared with those without AITT/EC practice (OR = 1.20, 95% CI 1.14-1.27), P for interaction < 0.001. In conclusion, the children diagnosed with primary enuresis after age 5 stopped using disposable diapers at daytime later than the control group. Association between duration of DD exposure and the risk of childhood enuresis is modified by AITT/EC practice. Timely cessation use of disposable diaper and practice Aitt/ec may shorten the time to nocturnal continence, and the prospective cohort studies are needed to verify the discoveries.

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