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Characterization results revealed that doping with boron promoter could significantly increase the copper dispersion, enhance the metal-support interaction, maintain suitable Cu +/(Cu + + Cu 0) ratio, and diminish metallic copper particles during the hydrogenation of DMO.
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EtOH) of 88% at 260 ☌, with no decrease even after reaction of 150 h, respectively. EG) of 95% at 190 ☌, and maintaining the average EtOH selectivity (Sel. The optimized 2B-Cu/SiO 2 catalyst exhibited excellent low temperature catalytic activity and long-term stability, maintaining the average EG selectivity (Sel. Experimental results showed that boron promoter could significantly improve the catalytic performance by improving the structural characteristics of the Cu/SiO 2 catalysts. The R package holland is a promising computational environment providing multiple coefficients for Holland’s most important theoretical concepts.īoron (B) promoter modified Cu/SiO 2 bifunctional catalysts were synthesized by sol-gel method and used to produce ethylene glycol (EG) and ethanol (EtOH) through efficient hydrogenation of dimethyl oxalate (DMO). Furthermore, recommendations are made in the case of multiple coefficients for the same theoretical concept and features that future releases should include are discussed.
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For this purpose, the functions of the package are applied and discussed. The current paper presents the package and examines it in terms of its application for research and practice. The recently released R package holland aims at providing a holistic collection of the references, descriptions and calculations of the most important coefficients. Its application in research and practice requires the determination of coefficients, which quantify its core concepts such as person-environment fit. The theory states that people should seek work environments that fit their vocational interests in order to be satisfied and successful. Holland’s theory of vocational choice is one of the most prominent career theories and is used by both researchers and practitioners around the world. Limitations might arise because of the small number of studies included. This meta-analysis provides evidence that SDCT seems to be an adequate alternative to BDCT regarding udder health with a simultaneous reduction in antibiotic use. Substantial heterogeneity was observed between the trials regarding the pooled proportion of antibiotic use within the SDCT groups ( I 2 = 97.7% p < 0.001). The final number of included studies was n = 3 for IMI risk after calving and n = 5 for new IMI risk after calving, cure risk during the dry period, and antibiotic use. A meta-analytical assessment was performed for each outcome of interest using random-effects models, and the relative risk (RR) for IMI and cure or the pooled proportion for antibiotic use was calculated. The systematic search was carried out using the databases PubMed, CAB Direct, and ScienceDirect.
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blanket dry cow treatment (BDCT) in dairy cows regarding the risk of intramammary infection (IMI) after calving, new IMI risk after calving, cure risk during the dry period, and a reduction in antibiotic use at drying-off by meta-analysis. The objectives of this paper were (i) to perform a systematic review of the literature over the last 21 yr and (ii) to evaluate the efficacy of selective dry cow treatment (SDCT) vs.