A well-designed magnetic rodlike MOF-based nanocomposite confining highly dispersed Pt single atoms and clusters (denoted as Fe 3 O 4 -NR@ ZIF-8/Pt) is fabricated and plays dual functional roles in high-efficient nanocatalysis and magnetically actuated stirring. Results of the catalytic experiments for dye degradation, hydrogen production of NaBH 4 , and hydrogenation of olefins show that Fe 3 O 4 -NR@ZIF-8/Pt exhibits enhanced catalytic performance in the absence of external stirring, compared with those of traditional catalytic systems, which need external stirring. Of special note, this proposed structure provides a facile and effective methodology to improve the catalytic performance of MOF-based composites without traditional external stirring and offers an outlook toward extending more application fields of MOFs and other porous materials.

Background: Multiple randomized controlled trials have shown that targeted temperature management (TTM) has favorable effects in out-of-hospital cardiac arrest. However, the benefit of TTM in patients with in-hospital cardiac arrest (IHCA) remains to be verified. Methods:The PubMed, Cochrane Library, and EMBASE databases were searched for clinical studies with the primary outcomes of survival to hospital discharge and neurological outcomes. Neurological outcomes were evaluated by the categorical scale of cerebral function (CPC); a score of 1-2 points was considered neurologically good, and a score of 3-5 points was considered a poor outcome. Revman 5.3 and Stata 14 software with the random effects model were used for analysis. P<0.05 was considered statistically significant.Results: Six retrospective controlled studies with a total of 14,607 patients (TTM group: 1,845, control group: 12,762) were included and analyzed. There were no statistically significant differences between the two groups in survival to hospital discharge [odds ratio (OR) =1.02, 95% CI: 0.77-1.35, P=0.89, I 2 =47%] or favorable neurological outcomes (OR =1.06, 95% CI: 0.56-2.02, P=0.85, I 2 =79%). After excluding patients with non-shockable initial rhythms, TTM did not show any significant improvement in survival to hospital discharge. Subgroup analysis was performed according to the sample size. No significant improvement was observed between the two groups in terms of survival to hospital discharge or neurological outcome.Discussion: In this meta-analysis, the effects of TTM on discharge survival and neurological prognosis were evaluated by studying the results of IHCA in 14,607 patients. We found that the TTM did not improve survival and neurological function in discharged patients. Our results showed that the sample size discrepancy had a large effect on the heterogeneity; to address this, subgroup analyses were performed according to the different sample sizes. However, TTM treatment in different sample size subgroups showed no significant effect on survival to hospital discharge. Moreover, in the large sample size subgroup, therapeutic hypothermia was associated with increased unfavorable neurological outcome compared with no hypothermia.

The microRaman scattering of 4H-SiC films, fabricated by low pressure chemical vapor deposition under different growth conditions, is investigated at temperatures ranging from 80 K to 550 K. The effects of growth conditions on E2(TO), E1(TO) and A1(LO) phonon mode frequencies are negligible. The temperature dependences of phonon linewidth and lifetime of E2(TO) modes are analyzed in terms of an anharmonic damping effect induced by thermal and growth conditions. The results show that the lifetime of E2(TO) mode increases when the quality of the sample improves. Unlike other phone modes, Raman shift of A1 (longitudinal optical plasma coupling (LOPC)) mode does not decrease monotonously when the temperature increases, but tends to blueshift at low temperatures and to redshift at relatively high temperatures. Theoretical analyses are given for the abnormal phenomena of A1(LOPC) mode in 4H-SiC.

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