A mixed phase lanthanum vanadate in situ induced by graphene oxide/graphite carbon nitride for efficient photocatalytic hydrogen generation

A mixed phase LaVO₄ with high dispersion was in situ induced and implanted in graphene oxide-graphite carbon nitride composite. The obtained nanocomposite (GO–C₃N₄–LaVO₄) showed high and stable photocatalytic activity for hydrogen evolution, which significantly benefited from the improved charge separation and light absorption in the special composite photocatalyst as evidenced by UV–vis spectra, fluorescence spectrum, photocurrent response and electrochemical impedance. The fabrication strategy of mixed phase LaVO₄ in the GO-C₃N₄ provides a new idea for constructing cheap and active organic-inorganic semiconductor photocatalysts for hydrogen generation.     

纯电动汽车齿轮箱效率测试平台开发及数据研究

纯电动汽车利用可充电电池作为动力来源,对环境影响相对传统汽车较小,具有广阔的前景,但当前技术尚不成熟,未完全取代传统燃油汽车,其中比较重要的原因是续航里程短.纯电动汽车齿轮箱作为传动装置中的一个重要部件,传动效率的好坏直接影响到整车质量,效率高低是衡量齿轮箱优劣的一项重要指标.分析了齿轮箱效率测试方法,描述了测试原理,并搭建了测试平台,对测试结果进行了分析.测试结果显示了扭矩对效率正向相关,转速对效率反向相关的特性,同时阐明了油温对于不同工况下变速箱效率的影响.     

Erratum to: Novel Hybrid Ligands for Passivating PbS Colloidal Quantum Dots to Enhance the Performance of Solar Cells

Nano-Micro Letters -     

Exergy analysis of two-stage steam-water jet injector

Exergy analysis is used as a tool to evaluate exergy losses in the steam-water jet injector so as to improve its overall performance. What this article addresses here is mainly about a parametric study on the injector under various operating conditions, such as different inlet water temperature, inlet steam pressure, pressure ratio, entrainment ratio and flowrate ratio. In addition, the irreversible losses in the component parts of the two-stage injector were analyzed in detail. The results show that the operating parameters have great effects on exergy efficiency of the injector. The average exergy efficiency of the two-stage injector is 21% more than that of the single-stage one. Moreover, calculations based on experimental data indicate that the highest exergy losses due to irreversibility occur in the first-stage mixing chamber. In light of this comparison, the exergy losses occurring in the system are proportional to the exergy efficiency obtained by applying the system.     

基于PatentStrategies的变性淀粉专利技术分析

变性淀粉以其良好的适应性应用于食品、造纸、纺织、医药、轻工业、建材、石油、生物工程等行业,近年来受到越来越多的研究者的关注。基于Patent Strategies专利分析系统,对全球和中国变性淀粉专利技术进行专利授权、布局、技术来源、竞争力、IPC分类等角度的分析,在挖掘该研究领域核心专利的基础上,进一步分析变性淀粉领域的核心专利情况。该分析可为变性淀粉企业及研发人员提供重要参考。     

Flame retardant finishing of the polyester/cotton blend fabric using a cross‐linkable hydroxy‐functional organophosphorus oligomer

Blend fabrics of cotton and polyester are widely used in apparel, but high flammability becomes a major obstacle for applications of those fabrics in fire protective clothing. The objective of this research was to investigate the flame retardant finishing of a 50/50 polyester/cotton blend fabric. It was discovered previously that N,N′‐dimethyloldihydroxyethyleneurea (DMDHEU) was able to bond a hydroxy‐functional organophosphorus oligomer (HFPO) onto 50/50 nylon/cotton blend fabrics. In this research, the HFPO/DMDHEU system was applied to a 50/50 polyester/cotton twill fabric. The polyester/cotton fabric treated with 36% HFPO and 10% DMDHEU achieved char length of 165 mm after 20 laundering cycles. The laundering durability of the treated fabric was attributed to the formation of polymeric cross‐linked networks. The HFPO/DMDHEU system significantly reduced peak heat release rate (PHRR) of cotton on the treated polyester/cotton blend fabric, but its effects on polyester were marginal. HFPO/DMDHEU reduced PHRR of both nylon and cotton on the treated nylon/cotton fabric. It was also discovered that the nitrogen of DMDHEU was synergistic to enhance the flame retardant performance of HFPO on the polyester/cotton fabric.     

Interaction of IL-22/IL-22R1 promotes cell proliferation and suppresses apoptosis of colorectal cancer via phosphorylation of STAT3

Interleukin-22 (IL-22) is a member of IL-10 cytokine family which is expressed in activated T cells predominantly and in activated natural killer cells at lower levels. Previous studies have demonstrated the link between elevated levels of IL-22 and disease severity of psoriasis, Crohn’s disease, rheumatoid arthritis and interstitial lung diseases. However, the function of IL-22 in the development and progression of colorectal cancer (CRC) remains elusive. In this study, we first evaluated the IL-22/IL-22R1 level in CRC patients, and found that tumor tissues have more active expression of IL-22 and IL-22R1 than normal tissues, presenting correlation with the degree of differentiation of tumor tissues. Subsequently, Caspase and cell viability assays were performed on SW-480 cell line which expresses high level of IL-22R1 to examine if the supplementation of IL-22 has an impact on apoptosis and proliferation. In comparison with treatment of 5-FU, supplementation of IL-22 promoted cell proliferation and ameliorated apoptosis. To unveil signal transduction upon activation of IL-22R, we examined the phosphorylation of STAT3 in SW-480 cell line following supplementation of IL-22. The treatment of IL-22 also increased the level of p-Akt, an essential component in PI3K/Akt pathway. Although the link between STAT3 phosphorylation and PI3K/ Akt activation remains to be explored, our study revealed the mechanism underlying the effects of IL-22R activation on apoptosis as well as tumor differentiation, indicating the prognostic value of IL-22/IL-22R.