Risk assessment of oil and gas investment environment in countries along the Belt and Road Initiative

With the implementation of the Belt and Road Initiative, China is deepening its cooperation in oil and gas resources with countries along the Initiative. In order to better mitigate risks and enhance the safety of investments, it is of significant importance to research the oil and gas investment environment in these countries for China's overseas investment macro-layout. This paper proposes an indicator system including 27 indicators from 6 dimensions. On this basis, game theory models combined with global entropy method and analytic hierarchy process are applied to determine the combined weights, and the TOPSIS-GRA model is utilized to assess the risks of oil and gas investment in 76 countries along the Initiative from 2014 to 2021. Finally, the GM(1,1) model is employed to predict risk values for 2022-2025. In conclusion, oil and gas resources and political factors have the greatest impact on investment environment risk, and 12 countries with greater investment potential are selected through cluster analysis in conjunction with the predicted results. The research findings may provide scientific decisionmaking recommendations for the Chinese government and oil enterprises to strengthen oil and gas investment cooperation with countries along the Belt and Road Initiative.

Network pharmacology studies on Reduning injection in treatment of COVID-19

Background:Network pharmacology was used to explore the mechanism of the Chinese patent medicine Reduning injection in the treatment of corona virus disease 2019.Methods:The chemical constituents and targets of Qinghao(Artemisiae annuae herba),Jinyinhua(Lonicerae japonicae flos),Zhizi(Gardeniae fructus)in the Chinese patent medicine Reduning injection were obtained from Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform,and the target related to corona virus disease 2019 was searched in GeneCards database,then perform Venn analysis on the targets of corona virus disease 2019 and the Chinese patent medicine Reduning injection,to screen the compounds and targets of the Chinese patent medicine Reduning injection in the treatment of corona virus disease 2019.The String platform was used to construct the protein-protein interaction network,and key targets were screened.Cytoscape 3.5.1 was used to construct the active traditional Chinese medicine-chemical composition-target-disease network to screen the key active components,and the gene ontology function and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis were performed on the common target through DAVID(6.8)online analysis data tool to predict the mechanism of action.Results:Fifty-two active ingredients and 232 targets were selected from the Chinese patent medicine Reduning injection,including 44 targets related to corona virus disease 2019.A total of 310 gene ontology biological processes and 94 Kyoto Encyclopedia of Genes and Genomes signaling pathways were obtained,which were mainly involved in inflammation,viral infection,bacterial infection,immune response and substance metabolism,et al.Conclusion:The mechanism of the Chinese patent medicine Reduning injection in the treatment of corona virus disease 2019 may be related to antivirus,bacteriostasis,anti-inflammatory and antifebrile,immune regulation and metabolism regulation,et al.

高血浆黏度与肾功能进展的关系

目的探讨高血浆黏度(PV)与肾功能进展的关系,为控制慢性病、提高人群生命质量提供依据。方法采用回顾性研究收集2005年1月—2012年12月徐州市中心医院重复健康体检者资料。将暴露于高PV者(暴露组214例)与未暴露于高PV者(非暴露组642例)按1∶3配对,比较血肌酐(Scr)、血尿酸(UA)及肾小球滤过率(GFR)等指标。结果两组入组时各指标均衡可比,经过7年随访观察,两组年龄、身高、体重、收缩压、舒张压、血尿素氮(BUN)、高密度脂蛋白(HDL)、UA及血糖(GLU)比较,差异无统计学意义(P>0.05);暴露组Scr、总胆固醇(TC)、甘油三酯、PV较非暴露组高(P<0.05),而GFR较非暴露组低(P <0.05);暴露组肾功能进展患病率高于非暴露组(P <0.05);TC中介效应为17.7%。结论高PV很可能通过TC的介导,成为慢性肾脏病的危险因素。

The reason for the amelioration of N-methyl-N-nitrosourea-induced retinitis pigmentosa in rats by hydrogen-rich saline

AIM：To investigate the effects of hydrogen-rich saline（HRS）on microglia activation and Sirtuin type 1（Sirt1）in rats with N-methyl-N-nitrosourea（MNU）-induced retinitis pigmentosa（RP）.METHODS：Rats were divided into norm（N）group,model（M）group and HRS（H）group.Rats in M and H groups were given saline and HRS respectively prior to and after administration of MNU.At one day（d1）and d3 afterwards,electroretinogram and histological examination were performed to confirm the effects of HRS on retinal function and structure of MNU-induced RP.Immunofluorescence staining of anti-ionized calcium-binding adapter molecule 1（Iba1）,a maker of microglia cells,was performed,with quantitative real-time polymerase chain reaction（qRT-PCR）for its m RNA quantification.Moreover,Sirt1 m RNA and protein expression in the retinas were detected by Western blot and qRT-PCR.RESULTS：HRS preserved the retinal function and mitigated the reduction of photoreceptor degeneration in MNU-treated retinas.The presence of microglia cells was somewhat more obvious in H group than that in M group at d1.HRS suppressed the further activation of microglia cells,with the number of microglia cells less than that of M group at d3.Results of qRT-PCR of Iba1 were consistent with those of immunofluorescence staining,with the m RNA expression of Iba1 in H group more intensive than that of M group at d1（P〈0.05）,while less than that of M group at d3（P〈0.05）.Furthermore,the Sirt1 m RNA and protein expression decreased after MNU administration,while HRS mitigated the MNU-induced downregulation of Sirt1.CONCLUSION：HRS can effectively keep microglia activation induced by MNU to an appropriate extent,while upregulate Sirt1 in MNU-induced RP.

Engineering of electrolyte ion channels in MXene/holey graphene electrodes for superior supercapacitive performances

MXene has given great promises to superca-pacitor electrode material due to its high conductivity and redox properties.However,the self-agglomeration of the MXene lamella will reduce its contact area with the elec-trolyte and generate a tortuous transportation pathway of the electrolyte ions,thereby reducing its capacitive per-formance and rate capability.In this work,we engineered the electrolyte ion channels by adjusting the MXene lamella size and inserting holey graphene(HG)nanosheets into the interlayer of the MXene flakes.The developed MXene/HG electrode can not only avoid the self-restack-ing of MXene but also provide unimpeded ion transport channels.As a result,the supercapacitive and rate perfor-mances of the small MXene lamella-based MXene/HG(S-MXene/HG)supercapacitor are prominently ameliorated.By adjusting the content of HG,the S-MXene/HG0.05 electrode exhibits excellent gravimetric capacitance of 446 F·g^(-1)and a rate capability of 77.5%.The S-MXene/HG0.05-based symmetric supercapacitor provides an impressive energy density of 14.84 Wh·kg^(-1)with excellent cyclic stability of 96%capacitance retention after 10,000 cycles.This demonstration of the engineering of the ion channels shows great potential in two-dimensional mate-rial-based supercapacitor electrodes.

Improved magnetic anisotropy of Co-based multilayer film with nitrogen dopant

Modulating the magnetic anisotropy of ferromagnetic thin films is crucial for constructing high-density and energy efficient magnetic memory devices. Ta/W(N)/Co/Pt multilayers were deposited on silicon substrates by magnetron sputtering at room temperature. The influences of N dopant on the magnetic anisotropy of the multilayers were investigated by preparing the sample with N incorporation. The results indicate that when sputtering W target with only argon gas(Ar), Ta/W/Co/Pt sample shows inplane magnetic anisotropy(IMA). When sputtering W target at a different amount of N_(2) and Ar atmosphere, it can induce perpendicular magnetic anisotropy(PMA) for proper N-doped Ta/W(N)/Co/Pt sample. When the gas flow ratio of Ar:N_(2) is 16:6, the effective magnetic anisotropy constant reach its maximum value of 1.68×10^(5) J·m^(-3),which enhanced by about 400% than our past works(annealing treatment is necessary to induce PMA in Pt/Co/MgO system). X-ray diffraction(XRD) and X-ray reflection(XRR) results demonstrate that N dopants can effectively promote the formation of b-W phase and reduce the roughness of W(N)/Co interface, which are beneficial for PMA. X-ray electron spectroscopy(XPS) analysis reveals that N doping redistributes Co charges, nitrogen ions participate in electron allocation of Co and attract some electrons of Co to form orbital hybridization between Co3 d and N 2 p. This may be another important reason for the PMA formation.