Preparation of Corncob-Like WO3 Nanomaterials and Their Photocatalytic Treatment of Toluene

Corn rod-like WO3 nanomaterials were successfully synthesized by a simple hydrothermal method. The morphology, structure and optical absorption properties of the prepared samples were characterized by SEM, XRD, FTIR and UV-Vis-DRS. The WO3 materials were corn rod-like morphology with about 800 nm for length and 150 nm for diameter, especially there were plenty of corn particles (about 20 nm) on the surface of corn rods. The X-ray diffraction peaks of the products corresponded with WO3 standard card, and the characteristic peak of W-O bond was found in the infrared spectrum. The absorption band edge of the products was about 480 nm, indicating their potential visible-light-induced photocatalytic activity. In situ FTIR technology research showed that the prepared WO3 nanomaterials had visible photocatalytic activity to gas-phase toluene. After a photocatalytic reaction for 8 hours toluene was effectively degraded, and carboxylic acid and aldehyde could be regarded as the intermediate products, and CO2 was produced as the final product during the reaction process.

2-O-β-D-Glucopyranosyl-L-ascorbic acid,an ascorbic acid derivative isolated from the fruits of Lycium barbarum L.,ameliorates high fructose-induced neuroinflammation in mice:involvement of gut microbiota and leaky gut

Western diet(rich in highly refined sugar and fat)can induce a range of metabolic dysfunctions in animals and humans,including neuroinflammation and cognitive function decline.Neuroinflammation and cognitive impairment,two critical pathological characteristics of Alzheimer’s disease,have been closely associated with microbial alteration via the gut-brain axis.Thus,the present study aimed to investigate the influence of 2-O-β-D-glucopyranosyl-L-ascorbic acid(AA-2βG)isolated from the fruits of Lycium barbarum on preventing the high-fructose diet(HFrD)induced neuroinflammation in mice.It was found that AA-2βG prevented HFr D-induced cognitive deficits.AA-2βG also predominantly enhanced the gut barrier integrity,decreased lipopolysaccharide entry into the circulation,which subsequently countered the activation of glial cells and neuroinflammatory response.These beneficial effects were transmissible by horizontal fecal microbiome transplantation,transferring from AA-2βG fed mice to HFr D fed mice.Additionally,AA-2βG exerted neuroprotective effects involving the enrichment of Lactobacillus and Akkermansia,potentially beneficial intestinal bacteria.The present study provided the evidence that AA-2βG could improve indices of cognition and neuroinflammmation via modulating gut dybiosis and preventing leaky gut.As a potential functional food ingredient,AA-2βG may be applied to attenuate neuroinflammation associated with Western-style diets.

Annual Fluxes of Heavy Metal Elements in Atmospheric Dry and Wet Depositions in the Pearl River Delta Economic Region, Guangdong Province

There are 158 sampling points to be set up in the Pearl River delta economic region. The collecting period is mostly one year, namely, from July 2007 to July 2008. The eight heavy metal elements of Cr, Ni, Cu, Pb, Zn, As, Hg, and Cd in 474 dry and wet deposition samples were tested in terms of the standard procedures. Their average annual fluxes have no obvious difference between dry deposition and wet deposition. So these elements might be at an equilibrium or quasi-equilibrium state between dry deposition and wet deposition.

Bcl-2 expression is a poor predictor for hepatocellular carcinoma prognosis of andropause-age patients

Objective: The expression of B-cell lymphoma 2(Bcl-2) seems to be influenced by the endocrine environment. Numerous reports demonstrate the diverse expression of Bcl-2 family members under sex steroid regulation. With the exception of estrogen-related tumors, androgen-related tumors have shown their characteristics in Bcl-2 expression. In this study, the status of Bcl-2 expression in male hepatocellular carcinoma(HCC) patients was examined to verify the high incidence of HCC in males.Methods: Tumor tissue microarray was used to examine Bcl-2 expression levels in 374 HCC cases including 306 males and 68 females. Kaplan-Meier method, log-rank test, and Cox proportional hazards model were applied to investigate the predictive value of Bcl-2 in HCC patients.Results: Immunohistochemistry analysis showed that male patients with higher Bcl-2 levels had significantly longer median survival time and recurrence time than those with lower levels. However, no significant differences in outcomes were found between different Bcl-2 levels in female patients. When the male patients were stratified into several age points, the level of Bcl-2expression showed poorer predictive efficiency in the 45–49 and 55–60 age groups in andropause-age patients compared with other age groups. Bcl-2 was an independent prognostic factor for both overall survival(P < 0.0001) and recurrence time(P =0.0001) in male patients. After excluding male patients in the 45–60 age group, the predictive efficiency was enhanced(n = 147,OS, P = 0.0002, TTR, P < 0.0001).Conclusions: Bcl-2 expression is an independent predictor of survival and recurrence in male HCC. Bcl-2 levels may also be regulated by androgens or androgen receptors in male HCC patients. Bcl-2 levels change and exhibit poor predictive efficiency when androgen levels vary dramatically(andropause age).

Determination of phthalate esters in physiological saline solution by monolithic silica spin column extraction method

Monolithic silica spin column extraction （MonoSpin-SPE） was developed as a simple, sensitive, and eco-friendly pretreatment method which combined with ultra-fast liquid chromatography-mass spectrometry （UFLC-MS） to determine the levels of six phthalate esters, dimethyl- （DMP）, diethyl- （DEP）, dipropyl- [ DPrP], butyl-benzyl- （BBP）, dicyclohexyl- （DcHP）, and di-n-octyl-（DOP） phthalate in physiological saline samples. Under optimized experimental conditions, the method was linear in the following ranges： 0.2- 50 μg/L for DMP, DEP, DPrP, DcHP and DOP; 5- 100 μg/L for BBP. The correlation coefficients （R2 ） were in the range of 0. 9951 - 0. 9995 for all the analytes and the limits of detection （LODs） and limits of quantification （LOQs） were in the ranges of 0.02 - 0.9 μg/L and 0.08 - 2.7μg/L, respectively. The pretreatment process showed good reproducibility with inter-day and intra-day relative standard deviations （RSDs） below 8.5% and 11.2%, respectively. This method was used to determine the levels of six phthalate esters in physiological saline samples and the recoveries ranged from 71.2% to 107.3%. DMP and DEP were found in actual physical saline samples （brand A and brand B）.

DRG支付背景下某公立医院专科建设思考及实施效果分析

近年来,随着医改的持续深化,按疾病诊断相关分组(DRG)支付逐渐成为新医改的焦点。DRG支付制度不仅是医保结付的方式,同时也是公立医院规范医生诊疗行为、衡量医疗服务质量的管理工具,促使医院由粗放管理转向精细管理转型,对公立医院的运营管理理念提出一系列挑战。因此,分析DRG支付方式改革给公立医院带来的影响以及相关运营情况意义重大。笔者选取某公立医院推进DRG支付方式改革以来的22 791例病案资料进行分析,探讨在DRG支付背景下医院运营的应对策略及主要问题,为公立医院更好地落实DRG支付政策及高质量发展转型提供建议。

A physical model study of surrounding rock failure near a fault under the influence of footwall coal mining

A study of the deformation of the surrounding rock and coal pillars near a fault under the influence of mining is conducted on a physical model for the design of coal pillars to support and maintain the roofs of adjacent fault roadways.This research is based on the 15101 mining face in the Baiyangling Coal Mine,Shanxi,China,and uses simulation tests similar to digital speckle test technology to analyse the displacement,strain and vertical stress fields of surrounding rocks near faults to determine the influence of the coal pillar width.The results are as follows.The surrounding rock of the roadway roof fails to form a balance hinge for the massive rock mass.The vertical displacement,vertical strain and other deformation of the surrounding rock near the fault increase steeply as the coal pillar width decreases.The steep increase in deformation corresponds to a coal pillar width of 10 m.When the coal pillar width is 7.5 m,the pressure on the surrounding rock near the footwall of the fault suddenly increases,while the pressure on the hanging wall near the fault increases by only 0.35 MPa.The stress of the rock mass of the hanging wall is not completely shielded by the fault,and part of the load disturbance is still transmitted to the hanging wall via friction.The width of the fault coal pillars at the 15101 working face is determined to be 7.5 m,and the monitoring data verify the rationality of the fault coal pillars.

北京某公立医院新院区筹备与初期运营实践

建设新院区是大型公立医院的重要发展战略之一,可以有效促进医疗资源扩容和合理布局,满足群众对优质医疗服务的需求。新院区的开办筹备和初期运营管理是其平稳运行、高质量发展的起点。本文介绍了北京某大型公立综合三甲医院新建院区开办筹备和初期运营管理的实践经验,为公立医院新院区的建设开办和多院区运营管理提供参考。

鸭坦布苏病毒感染对occludin和claudin-1基因mRNA表达的影响

紧密连接蛋白不仅是维持上皮屏障功能的重要蛋白,更是多种病毒感染细胞的受体与辅助分子。为了明确紧密连接主要组成蛋白occludin和claudin-1在鸭坦布苏病毒(Duck Tembusu virus, DTMUV)入侵细胞中的作用,本试验利用荧光定量PCR方法对病毒感染的非洲绿猴肾(vero)细胞两基因mRNA的表达量进行动态检测。结果表明,occludin和claudin-1的表达量与病毒含量具有相关性,感染后48 h内随着病毒含量的增加,occludin和claudin-1的mRNA上调表达,当病毒拷贝数下降且细胞出现明显病变后,两基因变为下调表达。试验结果有助于明确occludin和claudin-1在介导DTMUV入侵细胞中的作用,为后续功能受体的筛选和抗病毒制剂的研发提供依据。

城市医疗集团门诊质量管理指标体系构建研究

目的:构建城市医疗集团门诊质量管理指标体系,为规范和提高城市医疗集团整体的门诊质量提供循证管理依据。方法:以“结构-过程-结果”模型为理论框架,通过文献回顾形成初级指标池,采用德尔菲专家咨询法对20位专家开展两轮次函询,根据函询结果对指标体系进行修改完善。结果:两轮次函询问卷有效回收率100.0%,专家权威系数均大于0.75,KendallW协调系数为0.13~0.39,最终构建的城市医疗集团门诊质量管理指标体系共包括3个一级指标、15个二级指标、46个三级指标。结论:本研究构建的城市医疗集团门诊质量管理指标体系全面、科学、实用,为城市医疗集团门诊同质化管理、搭建连续性服务、医疗流程优化、质量考核评价提供循证依据。

课程思政背景下定积分的应用教学设计

以高等数学中定积分求平面图形的面积为例,提出课程思政背景下的一种教学设计架构.讲述中国冬奥故事,传递中国声音,激发学生民族自豪感,将家国情怀厚植于学生心中.在知识传授的过程中,以问题意识引领学生,启发学生主动发现问题、提出问题、分析问题、解决问题,从而培养学生主动思考、积极探索的科学精神.注重知识的应用,在实践中实现课程思政,达到润物无声的育人效果.

Use of Autologous Costal Cartilage Combined with Expanded Polytetrafluoroethylene in Asian Rhinoplasty

Background The corresponding author's experience and recent methods employed in autologous costal cartilage grafts combined with expanded polytetrafluoroethylene(ePTFE)in Asian rhinoplasty were presented in this study.Objectives The purpose of this study was to assess the outcomes of rhinoplasty performed on patients using autogenous costal cartilage grafts combined with an ePTFE implant.Methods Seventy-five rhinoplasty cases with autologous costal cartilage grafts and an ePTFE implant were retrospectively reviewed.Graft types,complications associated with the graft itself or graft harvesting,surgical outcomes,and patient satisfaction were assessed.Results The mean follow-up time post-operation was 13.5 months.A total of 42/75 patients underwent revision surgeries.Graft-related complications were found in 8%of cases,including two warped graft and four infection cases.Three individuals with infections had mild graft resorption.One patient with an infection removed the implant.Graft exposure,mobility,and substantial resorption were not recorded.A total of two cases underwent revision procedures for infection and perforation,respectively.Chest incision lengths for graft harvesting averaged 2.1 cm.No pneumothorax or significant donor-site pain was found.Donor-site scars were negligible,although two cases had hypertrophic chest scars.In general,functional and esthetic outcomes were mostly satisfactory among the assessed patients.Conclusions Rhinoplasty using autologous rib cartilage provides adequate support and sufficient cartilage amounts for correcting nasal contouring.Meanwhile,ePTFE alone for nasal dorsum augmentation safely achieves satisfactory outcomes.Rib cartilage rhinoplasty performed by an experienced surgeon yields excellent,long-lasting results with minimal risk;however,the potential for infection should be considered following revision surgery.

Genetic dissection of glutathione S-transferase omega-1:identification of novel downstream targets and Alzheimer's disease pathways

Alzheimer's disease(AD)is affected by genetic factors.Polymorphisms in the glutathione S-transfe rase omega-1(Gsto1)gene have been shown by genetic correlation analyses performed in different ethnic populations to be genetic risk factors for AD.Gene expression profile data from BXD recombinant inbred mice were used in combination with genetic and bioinformatic analyses to chara cterize the mechanisms underlying regulation of Gstol variation regulation and to identify network membe rs that may contribute to AD risk or progression.Allele-specific assays confirmed that variation in Gstol expression is controlled by cis-expression quantitative trait loci.We found that Gstol mRNA levels were related to several central nervous system traits,such as glial acidic fibrillary protein levels in the caudate putamen,co rtical gray matter volume,and hippocampus mossy fiber pathway volume.We identified 2168 genes whose expression was highly correlated with that of Gsto1.Some genes were enriched for the most common neurodegenerative diseases.Some Gsto1-related genes identified in this study had previously been identified as susceptibility genes for AD,such as APP,Grin2 b,Ide,and Psenen.To evaluate the relationships between Gstol and candidate network members,we transfected astrocytes with Gstol siRNA and assessed the effect on putative downstream effecto rs.We confirmed that knockdown of Gstol had a significant influence on Pa2g4 expression,suggesting that Pa2g4 may be a downstream effector of Gstol,and that both genes intera ct with other genes in a network during AD pathogenesis.

产NDM-1和产KPC-2耐碳青霉烯类肺炎克雷伯菌临床及分子流行病学特征比较

目的比较产NDM-1和产KPC-2耐碳青霉烯类肺炎克雷伯菌(CRKP)的临床及分子流行病学特征。方法回顾性分析2017—2020年某儿童医院非重复儿童住院患者临床分离的CRKP,查阅菌株来源患者的病历资料获得患者的基本临床特征。对CRKP进行药敏试验及多位点序列分型(MLST)分析,比较产NDM-1和产KPC-2的CRKP临床及分子流行病学特征。结果2017—2020年共收集164株CRKP菌株,其中96株携带bla NDM-1,68株携带bla KPC-2,产NDM-1的CRKP主要分布在新生儿科室,产KPC-2的CRKP以非新生儿科室居多,两组在标本来源、患者年龄、科室分布和预后情况方面比较,差异均有统计学意义(均P<0.05);产NDM-1的CRKP菌株以ST 17型和ST 278型为主,分别为40.63%、18.75%;而产KPC-2的CRKP菌株以ST 11为主,达73.53%。产KPC-2的CRKP分离株对头孢吡肟、氨曲南、亚胺培南、阿米卡星、庆大霉素、呋喃妥因和磷霉素的耐药率均高于产NDM-1的CRKP分离株,差异均有统计学意义(均P<0.05)。结论产NDM-1和产KPC-2的CRKP菌株在临床及分子流行病学方面均存在差异,产KPC-2的CRKP菌株表现出更严重的耐药性,感染KPC-2 CRKP的患者预后较差,应引起临床和感控的重视。

RNA-Seq profiling of circular RNAs in human colorectal cancer 5-fluorouracil resistance and potential biomarkers

BACKGROUND Colorectal cancer(CRC)is a commonly diagnosed cancer of the digestive system worldwide.Although chemotherapeutic agents and targeted therapeutic drugs are currently available for CRC treatment,drug resistance is a problem that cannot be ignored and needs to be solved.AIM To explore the relationship between circular RNA(circRNA)and CRC drug resistance.circRNA plays a key role in the occurrence and development of cancers,but its function in the process of drug resistance has not been widely revealed.METHODS To explore the role of circRNA in 5-fluorouracil(5-Fu)resistance,we performed the circRNA expression profile in two CRC cell lines and their homologous 5-Fu resistant cells by high-throughput sequencing.RESULTS We validated the differentially expressed circRNAs in other two paired CRC cells,confirmed that circ_0002813 and circ_0000236 could have a potential competitive endogenous RNA mechanism and be involved in the formation of 5-Fu resistance.And we combined the sequencing results of mRNA to construct the regulatory network of circRNA-miRNA-mRNA.CONCLUSION Our study revealed that circ_0002813 and circ_0000236 may as the biomarkers to predict the occurrence of 5-Fu resistance in CRC.

宁夏枸杞酚类及其衍生物的研究与应用进展

酚类化合物是植物中重要的一类次生代谢物,具有多种生物活性,被认为是营养、功能食品的主要功效成分。宁夏枸杞(Lycium barbarum L.)作为重要的药食同源滋补品,富含酚类化合物及其衍生物。本文综述了国内外宁夏枸杞酚类化合物及其衍生物的研究进展,包括宁夏枸杞酚类化合物的提取、分离、分析与鉴定方法及生物活性;同时也总结了酚类物质对枸杞食药风味/五味的贡献、合成代谢及其深加工应用研究进展,并对枸杞酚类化合物研发存在的问题提出建议及展望。以期为宁夏枸杞酚类及其衍生物的深入研究提供参考依据,为特色资源枸杞开发利用提供理论指导。

6例免疫检查点抑制剂相关性结肠炎的临床特征分析

目的收集并总结免疫检查点抑制剂(ICI)相关性结肠炎的临床特征。方法收集2021年1月至2022年2月上海中医药大学附属曙光医院收治的6例ICI相关性结肠炎患者的临床资料,分析并总结ICI相关性结肠炎的病程特点、临床表现、内镜及组织学特点、治疗方法以及患者预后转归情况。结果6例患者中男性5例,女性1例,ICI相关性结肠炎诊断年龄为48~70岁。6例患者在接受2~6次抗程序性死亡受体-1(Programmed death-1,PD-1)及其配体(Programmed death-ligand 1,PD-L1)疗程后,出现ICI相关性结肠炎,中位疗程为4.1个;首次抗PD-1/PD-L1治疗后,ICI相关性结肠炎起病时间为14~84 d,中位时间为53 d。6例患者中,4例为2级ICI相关性结肠炎,且病变在左半结肠,3级、4级各1例,病变范围均为全结肠。患者的症状主要为腹泻、腹痛、黏液血便。结肠镜下主要表现为弥漫而连续性的黏膜糜烂、充血和水肿,2例3~4级ICI相关性结肠炎患者结肠镜下可见多发不规则溃疡。黏膜活检病理均表现为黏膜活动性炎症伴隐窝炎、隐窝脓肿。6例患者完成结肠镜后,均接受了糖皮质激素治疗,其中2例3~4级ICI相关性结肠炎患者静脉使用甲基泼尼松龙3 d临床应答不佳,升级为英夫利昔单抗(IFX)治疗。6例患者均未重启ICI治疗。结论ICI相关性结肠炎有其相应的ICI治疗史以及临床、内镜、组织学特征,应根据患者症状予以分级治疗。糖皮质激素是最常用的治疗药物,应答不佳时,应尽早开启生物制剂治疗。

基于MPSO-BP算法的四电极电化学气体传感器温度补偿研究

针对四电极电化学气体传感器的测量精度极易受环境温度影响的问题,提出一种基于粒子群优化BP神经网络算法(PSO-BP)的温度补偿方法。利用改进的PSO算法(MPSO)对BP神经网络的权值和阈值进行优化,构造四电极电化学气体传感器的温度补偿模型,并设计了气体传感器测试系统。实验结果表明,MPSO-BP算法可有效提高BP神经网络的收敛速度和泛化能力;基于MPSO-BP算法的四电极气体传感器温度补偿模型,可将温度补偿误差控制在0.1%以内。

癫痫及惊厥性癫痫持续状态医疗质量控制体系建设

癫痫是世界卫生组织重点防治的五大神经精神疾病之一,在我国有超1000万人受累,疾病负担沉重。经规范治疗,70%以上的癫痫患者可达到控制发作、重返社会的治疗目标。提高癫痫诊疗质量可有效改善我国癫痫医疗的可及性。2017年,在国家卫生健康委员会的支持下,国家神经系统疾病医疗质量控制中心成立了癫痫质控专病组,启动了癫痫及惊厥性癫痫持续状态医疗质量控制体系建设。癫痫及惊厥性癫痫持续状态医疗质量控制体系建设强化了我国的癫痫诊疗体系,调查了我国癫痫诊治现状,建设了数据来源互补医疗质量体系动态反馈机制。应用癫痫及惊厥性癫痫持续状态医疗质量工具可持续推动我国癫痫诊疗质量的同质化发展。

Acetylcholine participates in pain modulation by influencing endogenous opiate peptides in rat spinal cord

The spinal cord is a necessary pathway that transfers the body nociceptive inputs to the brain, and endo-genous opiate peptides (EOP) play an important role in pain modulation. Our previous work has proven that arginine vasopressin (AVP) antinociception in the caudate nucleus (CdN) relates with the acetylcholine (Ach) system mainly. The communication was de-signed to investigate the interrelations between Ach system and EOP system at the spinal level during pain process. The results showed that: 1) pain stimulation increased L-enkephalin (L-Ek), β-endorphin (β-Ep), dynorphin A1-13(DynA1-13), Ach and choline (Ch, an Ach metabolic product) concentrations in the spinal cord;2) Ach increased L-Ek, β-Ep and DynA1-13 concentrations in the spinal cord;and 3) Atropine (M-receptor inhibitor) or hexahydric gallamine (N-receptor inhibitor) decreased L-Ek, β-Ep and DynA1-13 concentrations in the spinal cord. The data suggested that Ach antinociception was involved in the EOP system at the spinal level.