不同纬度地区航磁三分量矢量解释技术应用研究

我国的航磁三分量勘查系统于2017年研制成功,但是利用大面积性航磁三分量数据开展地质解释研究尚处于起步阶段,通过研究认为垂向分量、东向分量和北向分量数据需要进行化极,虽然相关文献和教材开展了航磁三分量中三个分量的化极理论公式的推导但并不是最终结果,本文经过深入的理论公式推导首次获得了三个分量的化极理论公式,同时将化极后的三个分量数据得到的磁异常总强度矢量数据的相关意义进行了深入分析,得出磁异常总强度矢量图可以较好地指向磁性地质体的赋存位置,在此基础上设计了单一异常体的简单模型和4个异常体的复杂模型开展理论分析,对不同纬度的三个分量数据化极效果进行了分析,得出虽然在低纬度地区三个分量的化极效果并不理想,但是所绘制的磁异常总强度矢量箭头图却可以不受低纬度化极效果不好的影响,在纬度1°-90°的三个分量数据经过化极后绘制的磁异常总强度矢量箭头总能指向磁性地质体,而且汇聚的矢量箭头的位置还可以反映地质体的埋藏深度,然后将该思路应用于中国北部某地区的航磁三分量数据,所绘制的磁异常总强度矢量箭头图出现了指上和指下的现象,通过研究认为箭头图指上的现象是由于该区域的磁性地质体存在有剩磁现象,通过对比地质资料并得到了验证。

Leakage Proof,Flame-Retardant,and Electromagnetic Shield Wood Morphology Genetic Composite Phase Change Materials for Solar Thermal Energy Harvesting

Phase change materials(PCMs)offer a promising solution to address the challenges posed by intermittency and fluctuations in solar thermal utilization.However,for organic solid-liquid PCMs,issues such as leakage,low thermal conductivity,lack of efficient solar-thermal media,and flamma-bility have constrained their broad applications.Herein,we present an innova-tive class of versatile composite phase change materials(CPCMs)developed through a facile and environmentally friendly synthesis approach,leveraging the inherent anisotropy and unidirectional porosity of wood aerogel(nanowood)to support polyethylene glycol(PEG).The wood modification process involves the incorporation of phytic acid(PA)and MXene hybrid structure through an evaporation-induced assembly method,which could impart non-leaking PEG filling while concurrently facilitating thermal conduction,light absorption,and flame-retardant.Consequently,the as-prepared wood-based CPCMs showcase enhanced thermal conductivity(0.82 W m^(-1)K^(-1),about 4.6 times than PEG)as well as high latent heat of 135.5 kJ kg^(-1)(91.5%encapsula-tion)with thermal durability and stability throughout at least 200 heating and cooling cycles,featuring dramatic solar-thermal conversion efficiency up to 98.58%.In addition,with the synergistic effect of phytic acid and MXene,the flame-retardant performance of the CPCMs has been significantly enhanced,showing a self-extinguishing behavior.Moreover,the excellent electromagnetic shielding of 44.45 dB was endowed to the CPCMs,relieving contemporary health hazards associated with electromagnetic waves.Overall,we capitalize on the exquisite wood cell structure with unidirectional transport inherent in the development of multifunctional CPCMs,showcasing the operational principle through a proof-of-concept prototype system.

Curative effect of hydrogen peroxide combined with silver ion disinfection on pelvic floor dysfunction

BACKGROUND Pelvic floor dysfunction(PFD)is related to muscle fiber tearing during childbirth,negatively impacting postpartum quality of life of parturient.Appropriate and effective intervention is necessary to promote PFD recovery.AIM To analyze the use of hydrogen peroxide and silver ion disinfection for vaginal electrodes in conjunction with comprehensive rehabilitation therapy for postpartum women with PFD.METHODS A total of 59 women with PFD who were admitted to the hospital from May 2019 to July 2022 were divided into two groups:Control group(n=27)received comprehensive rehabilitation therapy and observation group(n=32)received intervention with pelvic floor biostimulation feedback instrument in addition to comprehensive rehabilitation therapy.The vaginal electrodes were disinfected with hydrogen peroxide and silver ion before treatment.Intervention for both groups was started 6 weeks postpartum,and rehabilitation lasted for 3 months.Pelvic floor muscle voltage,pelvic floor muscle strength,vaginal muscle voltage,vaginal muscle tone,pelvic floor function,quality of life,and incidence of postpartum PFD were compared between the two groups.RESULTS Before comprehensive rehabilitation treatment,basic data and pelvic floor function were not significantly different between the two groups.After treatment,the observation group showed significant improvements in the maximum voltage and average voltage of pelvic floor muscles,contraction time of type I and type II fibers,pelvic floor muscle strength,vaginal muscle tone,vaginal muscle voltage,and quality of life(GQOLI-74 reports),compared with the control group.The observation group had lower scores on the pelvic floor distress inventory(PFDI-20)and a lower incidence of postpartum PFD,indicating the effectiveness of the pelvic floor biostimulation feedback instrument in promoting the recovery of maternal pelvic floor function.CONCLUSION The combination of the pelvic floor biostimulation feedback instrument and comprehensive rehabilitation nursing can improve pelvic floor muscle strength,promote the recovery of vaginal muscle tone,and improve pelvic floor function and quality of life.The use of hydrogen peroxide and silver ion disinfectant demonstrated favorable antibacterial efficacy and is worthy of clinical application.

Sleep disturbances and psychomotor retardation in the prediction of cognitive impairments in patients with major depressive disorder

BACKGROUND Symptoms of depression and comorbid anxiety are known risk factors for cognitive impairment in major depressive disorder(MDD).Understanding their relationships is crucial for developing targeted interventions to mitigate cognitive impairments in MDD patients.We expect that the severity of sleep disturbances and other depressive symptoms will be positively correlated with the degree of cognitive impairments.We also hypothesize that anxiety symptoms,especially psychic anxiety,is a key factor in predicting cognitive performance in MDD patients and may indirectly contribute to cognitive impairment by affecting sleep disturbances and other potential factors.AIM To determine which dimension of the depressive and anxiety symptoms predicts cognitive impairment during a depressive episode.METHODS A comprehensive neurocognitive test battery assessed executive function,attention,processing speed,and memory in 162 medication-free MDD patients and 142 matched healthy controls.The 24-item Hamilton Depression Rating Scale was used to assess depressive symptoms,and the 14-item Hamilton Anxiety Scale was used to assess anxiety symptoms.Linear regression analyses and mediation analyses were conducted to evaluate the impact of depressive and anxiety symptoms,as well as their interactions,on cognitive impairments.RESULTS Among the depressive symptoms,sleep disturbances were associated with poorer executive function(P=0.004),lower processing speed(P=0.047),and memory impairments(P<0.001),and psychomotor retardation(PR)was associated with lower processing speed in patients with MDD(P=0.019).Notably,PR was found to mediate the impact of sleep disturbances on the processing speed.Regarding anxiety symptoms,psychic anxiety,rather than somatic anxiety,was associated with cognitive impairments in all aspects.Sleep disturbances mediated the effect of psychic anxiety on executive function[β=-0.013,BC CI(-0.027,-0.001)]and memory[β=-0.149,BC CI(-0.237,-0.063)],while PR mediated its effect on processing speed(β=-0.023,BC CI(-0.045,-0.004)].CONCLUSION Sleep disturbances may be a key predictor of poorer executive function,lower processing speed,and memory loss,while PR is crucial for lower processing speed during a depressive episode.Psychic anxiety contributes to all aspects of cognitive impairments,mediated by sleep disturbances and PR.

右美托咪定复合芬太尼对新生儿机械通气的镇痛镇静效果观察

目的观察右美托咪定复合芬太尼对新生儿机械通气的镇痛镇静效果。方法接受机械通气的新生儿96例随机分为对照组和研究组,每组48例。对照组在机械通气过程中静脉持续泵入芬太尼,研究组在机械通气过程中静脉持续泵入右美托咪定复合芬太尼。比较两组患儿的机械通气时间,记录两组患儿用药前(T0)、用药后1 h(T1)、用药后12 h(T2)、用药后24 h(T3)、用药后48 h(T4)的心率(HR)、平均动脉压(MAP)以及呼吸频率(RR)、吸气峰压(PIP)变化;采用新生儿疼痛量表(NIPS评分)以及Ramsay评分对两组患儿上述时间点的镇痛镇静效果进行评价,并对比两组不良反应。结果两组患儿机械通气时间比较差异无统计学意义(P>0.05)。T1~T4时,两组HR较T0时降低(P<0.05),但研究组上述时间点HR高于对照组(P<0.05);研究组的MAP在T0~T4时无明显变化(P>0.05),而对照组T1~T3时的MAP较T0时降低(P<0.05),T1时研究组MAP高于对照组(P<0.05);T1~T3时,对照组RR较T0时降低(P<0.05),研究组RR仅在T3时低于T0时(P<0.05),且研究组RR在T1时高于对照组(P<0.05);两组PIP在T3、T4时较T0时降低(P<0.05),且T2~T4时研究组PIP低于对照组(P<0.05)。T1~T4时,两组患儿的NIPS评分依次降低,Ramsay评分则依次升高(P<0.05),且研究组患儿的NIPS评分均低于对照组(P<0.05),Ramsay评分高于对照组(P<0.05)。研究组总不良反应发生率明显低于对照组(P<0.05)。结论右美托咪定复合芬太尼对新生儿机械通气有显著镇痛镇静效果,对血流动力学水平影响小,安全性高。

Systematic review of fibroblastic rheumatism:A case report

BACKGROUND Fibroblastic rheumatism(FR)is a rare fibroproliferative disease with an unknown etiology.The absence of typical symptoms makes early diagnosis challenging.This study aims to systematically review FR cases and present a case from our center to provide a comprehensive description of the clinical manifestations,diagnosis,and treatment,thereby assisting clinicians in early identification and timely management of FR,ultimately leading to improved prognosis.CASE SUMMARY FR is a rare fibroproliferative disease with an unknown etiology.It is characterized by rapidly progressive and destructive symmetrical inflammatory multiple arthritis.Here,we present a rare case of a 50-year-old female with symmetric inflammatory polyarthritis.We highlight the importance of a comprehensive medical history,histopathology,immunohistochemistry,and clinical manifestations of skin nodules,arthralgia,and arthritis for successful disease diagnosis.Despite employing non-steroidal anti-inflammatory drugs,corticosteroids,methotrexate,and tacrolimus,the patient's symptoms did not resolve,and joint destruction continued to progress.Early diagnosis,aggressive treatment with appropriate use of steroids and immunosuppressants,and further research to identify effective treatment strategies are crucial in preventing detrimental joint destruction and limb contractures.CONCLUSION A comprehensive review of the available literature emphasizes the importance of early and accurate diagnosis coupled with appropriate treatment for achieving favorable outcomes and preventing joint destruction and limb contractures.

急性心肌梗死急诊经皮冠状动脉介入术后慢血流/无复流的相关因素研究

目的分析急性心肌梗死(AMI)患者急诊经皮冠状动脉介入术(PCI)后慢血流/无复流的相关因素。方法回顾性分析2018年5月—2020年9月于沧州市中心医院接受急诊PCI术的280例AMI患者的临床资料,根据术后是否出现慢血流/无复流分为慢血流/无复流组(46例)和正常血流组(234例)。比较两组的基线资料、造影结果、手术相关指标、生化指标、住院期间用药情况;采用多因素Logistic回归分析影响PCI术后慢血流/无复流发生的危险因素。结果两组的收缩压、吸烟、症状至PCI时间及Killip分级,差异有统计学意义(P<0.05);两组的性别构成、年龄、舒张压、心率、高血压、糖尿病、高脂血症、心肌梗死部位比较,差异无统计学意义(P>0.05)。两组的血栓负荷程度比较,差异有统计学意义(P<0.05);两组的血管直径、入院至球囊扩张时间、支架数量、球囊扩张次数、病变血管数量、梗死相关血管、病变位置比较,差异无统计学意义(P>0.05)。两组入院即刻血糖、D-D、LDL-C水平比较,差异有统计学意义(P<0.05),慢血流/无复流组入院即刻血糖、D-D、LDL-C水平高于正常血流组;两组Scr、UA、TC、TG、HDL-C、WBC、NEU、ALT、AST、GGT比较,差异无统计学意义(P>0.05)。两组住院期间用药情况比较,差异无统计学意义(P>0.05);多因素Logistic回归分析结果显示:吸烟[OR^(^)=2.197(95%CI:1.158,4.167)]、收缩压<120 mmHg[OR^(^)=1.889(95%CI:1.564,2.672)]、症状至PCI时间≥6 h[OR^(^)=3.094(95%CI:1.618,5.914)]、Killip分级≥Ⅱ级[OR^(^)=2.014(95%CI:1.016,3.989)]、入院即刻血糖≥10.0 mmol/L[OR^(^)=1.546(95%CI:1.168,2.465)]、D-D≥0.5 mg/L[OR^(^)=1.956(95%CI:1.175,2.745)]、LDL-C≥3.37 mmol/L[OR^(^)=1.624(95%CI:0.895,2.165)]、重度血栓负荷[OR^(^)=2.369(95%CI:1.325,5.750)]均是PCI术后慢血流/无复流发生的危险因素(P<0.05)。结论吸烟、收缩压、症状至PCI时间、Killip分级、入院即刻血糖、D-D、LDL-C及血栓负荷程度是AMI患者PCI术后慢血流/无复流发生的危险因素,临床应规避上述风险因素,密切监测围手术期入院即刻血糖、D-D、LDL-C水平变化,以降低术后慢血流/无复流发生风险。

半剂量替罗非班辅助经皮冠状动脉介入术治疗老年急性ST段抬高心肌梗死患者的临床研究

目的探讨半剂量替罗非班辅助急诊经皮冠状动脉介入术(PCI)对老年急性ST段抬高心肌梗死(STEMI)患者的影响。方法选取2020年5月—2021年5月在沧州市中心医院行急诊PCI治疗的STEMI老年患者98例,随机分为两组,每组49例。其中,A组给予标准剂量替罗非班治疗,B组给予半剂量替罗非班治疗。观察两组TIMI血流分级及校正的TIMI计帧数(CTFC)、左室射血分数(LVEF)、左室收缩末期内径(LVESD)、左室舒张末期内径(LVEDD)、心肌肌钙蛋白(cTnⅠ)、N端前脑钠肽(NT-proBNP)、肌酸激酶同工酶(CK-MB)水平,记录两组治疗期间主要心血管不良事件(MACE)及出血并发症的情况。结果两组术后TIMI血流分级、CTFC、LVEF、LVESD、LVEDD比较,差异无统计学意义(P>0.05);两组术后LVEF高于术前,LVEDD及LVESD小于术前(P<0.05);B组术后血清cTnⅠ、CK-MB及NT-proBNP水平比A组低(P<0.05);B组MACE总发生率(2.04%)与A组(8.16%)比较,差异无统计学意义(P>0.05);B组出血总发生率(2.04%)低于A组(16.33%)(P<0.05)。结论半剂量替罗非班辅助PCI治疗老年急性STEMI患者的临床疗效较好,可有效改善患者心肌灌注水平、降低心肌损伤、降低出血并发症,且不增加MACE发生率,安全性较高。

An integrated approach to study of strata behaviour and gas flow dynamics and its application

This paper presents an advanced and integrated research approach to longwall mining-induced strata move- ment, stress changes, fractures, and gas flow dynamics with actual examples of its application from recent studies for coextraction of coal and methane development at Huainan Mining Group in China, in a deep and multi-seam mining environment. The advanced approach takes advantage of the latest techniques in Australia for mine scale geotechnical characterisation, field measurement, monitoring and numerical modelling. Key techniques described in this paper include coal mine site 3D geotechnical characterisation methods, surface deep downhole multi-point extensometers and piezometers for overburden displacement and pore pressure measurements during mining, tracer gas tests for goal gas flow patterns, and advanced numerical modelling codes for coupled coal mine strata, water and gas simulations, and longwall goaf gas ttow investigations. This integrated approach has resulted in significant insights into the complex dynamic imeraction between strata, groundwater, and gas during mining at Huainan Mining Group in recent years. Based on the lindings from the extensive field monitoring and numerical modelling studies, a three-dimensional annular-shaped over-lying zone along the perimeter of the longwall panel was identified for optimal methane drainage during mining.

Diagnostic value of 5 serum biomarkers for hepatocellular carcinoma with different epidemiological backgrounds:A large-scale,retrospective study

Objective:Hepatocellular carcinoma(HCC)is a lethal global disease that requires an accurate diagnosis.We assessed the potential of 5 serum biomarkers(AFP,AFU,GGT-II,GPC3,and HGF)in the diagnosis of HCC.Methods:In this retrospective study,we measured the serum levels of each biomarker using ELISAs in 921 participants,including 298 patients with HCC,154 patients with chronic hepatitis(CH),122 patients with liver cirrhosis(LC),and 347 healthy controls from 3 hospitals.Patients negative for hepatitis B surface antigen and hepatitis C antibody(called"NBNC-HCC")and patients positive for the above indices(called"HBV-HCC and HCV-HCC")were enrolled.The selected diagnostic model was constructed using a training cohort(n=468),and a validation cohort(n=453)was used to validate our results.Receiver operating characteristic analysis was used to evaluate the diagnostic accuracy.Results:Theα-L-fucosidase(AFU)/α-fetoprotein(AFP)combination was best able to distinguish NBNC-HCC[area under the curve:0.986(95%confidence interval:0.958–0.997),sensitivity:92.6%,specificity:98.9%]from healthy controls in the test cohort.For screening populations at risk of developing HCC(CH and LC),the AFP/AFU combination improved the diagnostic specificity for early-stage HCC[area under the curve:0.776(0.712–0.831),sensitivity:52.5%,specificity:91.6%in the test group].In all-stage HBV-HCC and HCV-HCC,AFU was also the best candidate biomarker combined with AFP[area under the curve:0.835(0.784–0.877),sensitivity 69.1%,specificity:87.4%in the test group].All results were verified in the validation group.Conclusions:The AFP/AFU combination could be used to identify NBNC-HCC from healthy controls and hepatitis-related HCC from at-risk patients.

The role of bone marrow-derived cells in the origin of liver cancer revealed by single-cell sequencing

Objective:Epithelial cancers often originate from progenitor cells,while the origin of hepatocellular carcinoma(HCC)is still controversial.HCC,one of the deadliest cancers,is closely linked with liver injuries and chronic inflammation,which trigger massive infiltration of bone marrow-derived cells(BMDCs)during liver repair.Methods:To address the possible roles of BMDCs in HCC origination,we established a diethylnitrosamine(DEN)-induced HCC model in bone marrow transplanted mice.Immunohistochemistry and frozen tissue immunofluorescence were used to verify DENinduced HCC in the pathology of the disease.The cellular origin of DEN-induced HCC was further studied by single cell sequencing,single-cell nested PCR,and immunofluorescence-fluorescence in situ hybridization.Results:Studies by using single cell sequencing and biochemical analysis revealed that HCC cells in these mice were coming from donor mice BMDCs,and not from recipient mice.Furthermore,the copy numbers of mouse orthologs of several HCC-related genes previously reported in human HCC were also altered in our mouse model.DEN-induced HCCs exhibited a similar histological phenotype and genomic profile as human HCCs.Conclusions:These results suggested that BMDCs are an important origin of HCC,which provide important clues to HCC prevention,detection,and treatments.

Quantitative proteomic analysis for high-throughput screening of differential glycoproteins in hepatocellular carcinoma serum

Objective： Hepatocellular carcinoma （HCC） is a leading cause of cancer-related deaths. Novel serum biomarkers are required to increase the sensitivity and specificity of serum screening for early HCC diagnosis. This study employed a quantitative proteomic strategy to analyze the differential expression of serum glycoproteins between HCC and normal control serum samples. Methods： Lectin affinity chromatography （LAC） was used to enrich glycoproteins from the serum samples. Quantitative mass spectrometric analysis combined with stable isotope dimethyl labeling and 2D liquid chromatography （LC） separations were performed to examine the differential levels of the detected proteins between HCC and control serum samples. Western blot was used to analyze the differential expression levels of the three serum proteins. Results： A total of 2,280 protein groups were identified in the serum samples from HCC patients by using the 2D LC-MS/MS method. Up to 36 proteins were up-regulated in the HCC serum, whereas 19 proteins were down-regulated. Three differential glycoproteins, namely, fibrinogen gamma chain （FGG）, FOS-like antigen 2 （FOSL2）, and a-l, 6-mannosylglycoprotein 6-^-N-acetylglucosaminyltransferase B （MGATSB） were validated by Western blot. All these three proteins were up-regulated in the HCC serum samples. Conclusion： A quantitative glycoproteomic method was established and proven useful to determine potential novel biomarkers for HCC.

Periostin mediates epithelial-mesenchymal transition through the MAPK/ERK pathway in hepatoblastoma

Objective: The aim of the present study was to analyze the prognostic factors in patients with hepatoblastoma(HB) in our single center and to evaluate periostin(POSTN) expression in HB and its association with clinicopathological variables. In addition, the underlying mechanism of how POSTN promotes HB progression was discussed.Methods: POSTN expression was investigated in HB tumors by immunohistochemistry(IHC), immunofluorescence(IF) and Western blot(WB). The association among POSTN expression, clinicopathological features and overall survival(OS) was also evaluated. The migration and adhesion ability of HB cells were measured using chemotaxis and cell-matrix adhesion assays,respectively. Epithelial-mesenchymal transition(EMT)-associated markers and activation of the ERK pathway were detected by WB.Results: HB patients had poor prognosis which displayed lymph node metastasis, vascular invasion, POSTN and vimentin expression. POSTN expression was also associated with lymph node metastasis. Furthermore, overexpressed POSTN promoted migration and the adhesive ability of HB cells in vitro. In addition, we demonstrated that POSTN activated the MAPK/ERK pathway, upregulated the expression of Snail and decreased the expression of OVOL2. Finally, POSTN promoted the expression of EMT-associated markers.Conclusions: POSTN might modulate EMT via the ERK signaling pathway, thereby promoting cellular migration and invasion.Our study also suggests that POSTN may serve as a therapeutic biomarker in HB patients.

Cytosolic phospholipase A2α modulates cell-matrix adhesion via the FAK/paxillin pathway in hepatocellular carcinoma

Objective: To explore the effect of cytosolic phospholipase A2α(cPLA2α) on hepatocellular carcinoma(HCC) cell adhesion and the underlying mechanisms.Methods: Cell adhesion, detachment, and hanging-drop assays were utilized to examine the effect of cPLA2α on the cell-matrix and cell-cell adhesion. Downstream substrates and effectors of cPLA2α were screened via a phospho-antibody microarray.Associated signaling pathways were identified by the functional annotation tool DAVID. Candidate proteins were verified using Western blot and colocalization was investigated via immunofluorescence. Western blot and immunohistochemistry were used to detect protein expression in HCC tissues. Prognosis evaluation was conducted using Kaplan-Meier and Cox-proportional hazards regression analyses.Results: Our findings showed that cPLA2α knockdown decreases cell-matrix adhesion but increases cell-cell adhesion in HepG2 cells. Microarray analysis revealed that phosphorylation of multiple proteins at specific sites were regulated by cPLA2α. These phosphorylated proteins were involved in various biological processes. In addition, our results indicated that the focal adhesion pathway was highly enriched in the cPLA2α-relevant signaling pathway. Furthermore, cPLA2α was found to elevate phosphorylation levels of FAK and paxillin, two crucial components of focal adhesion. Moreover, localization of p-FAK to focal adhesions in the plasma membrane was significantly reduced with the downregulation of cPLA2α. Clinically, cPLA2α expression was positively correlated with p-FAK levels. Additionally, high expression of both cPLA2α and p-FAK predicted the worst prognoses for HCC patients.Conclusions: Our study indicated that cPLA2α may promote cell-matrix adhesion via the FAK/paxillin pathway, which partly explains the malignant cPLA2α phenotype seen in HCC.

The synthesis and application of zeolitic material from fly ash by one-pot method at low temperature

A new route to prepare zeolitic material was introduced in this work. Compared with traditional methods, the new route showed lower energy consume. The effect of pre-treatment conditions on structure and crystalline phase was investigated, revealing that the mullite crystalline phase in fly ash could be converted to amorphous phase by alkali at low temperature. The removal performance of heavy metal ions on designed material was also investigated, and we found that the intermediate product showed higher adsorption capacity on Ni^(2+) than zeolite A.

Anti-virus prophylaxis withdrawal may be feasible in liver transplant recipients whose serum HBeAg and HBV DNA are negative

Anti-virus prophylactic therapy may be not nec- essary for the prevention of hepatitis B virus （HBV） recur- rence after HBV-related liver transplantation （LT）. However, studies on completely stopping the hepatitis B immune globu- lin （HBIG） and nucleos（t）ide analogs （NUC） after LT are few. The aim of the current study was to evaluate the safety of anti- virus prophylaxis withdrawal in liver recipients whose serum hepatitis B e antigen （HBeAg） and HBV DNA are negative. We analyzed 190 patients undergone LT for HBV-related liver dis- ease from 2006 to 2012 and found that 10 patients completely stopped the HBIG and NUC due to poor compliance. These patients were liver biopsied and checked monthly with serum HBV markers, HBV DNA and liver function. Among the 10 patients, 9 did not show the signs of HBV recurrence after a mean follow-up of 51.6 months （range 20-73） after with- drawal of the HBIG and NUC. The average time from LT to the withdrawal of the anti-virus drug was 23.8 （13-42） months; one patient showed hepatitis B surface antigen-positive and detectable HBV DNA after stopping anti-virus drugs and this patient was successfully treated with entecavir. Our data sug- gested that complete withdrawal of anti-virus prophylaxis was safe and feasible for patients whose serum HBeAg and HBV DNA were negative at the time of LT.

Gene profiles between non-invasive and invasive colon cancer using laser microdissection and polypeptide analysis

AIM: To explore the expression of differential gene expression profiles of target cell between non-invasive submucosal and invasive advanced tumor in colon carcinoma using laser microdissection (LMD) in combination with polypeptide analysis. METHODS: Normal colon tissue samples from 20 healthy individuals and 30 cancer tissue samples from early non-invasive colon cancer cells were obtained. The cells from these samples were used LMD independently after P27-based amplification. aRNA from advanced colon cancer cells and metastatic cancer cells of 40 cases were applied to LMD and polypeptide analysis, semiquantitative reverse transcribed polymerase chain reaction (RT-PCR) and immunohistochemical assays were used to verify the results of microarray and further identify differentially expressed genes in non-invasive early stages of colon cancer. RESULTS: Five gene expressions were changed in colon carcinoma cells compared with that of controls. Of the five genes, three genes were downregulated and two were upregulated in invasive submucosal colon carcinoma compared with non-invasive cases. The results were confirmed at the level of aRNA and gene expression. Five genes were further identified as differentially expressed genes in the majority ofcases (> 50%, 25/40) in progression of colon cancer, and their expression patterns of which were similar to tumor suppressor genes or oncogenes. CONCLUSION: This study suggested that combined use of polypeptide analysis might identify early expression profiles of five differential genes associated with the invasion of colon cancer. These results reveal that this gene may be a marker of submucosal invasion in early colon cancer.

椰油酰水解燕麦蛋白钾对氨基酸洁面膏的性能影响

在一定的pH范围内,研究了4种温和表面活性剂对以椰油酰甘氨酸钠为主要表面活性剂制备的结晶型氨基酸洁面膏的结膏温度、高温稳定性、外观状态、泡沫性能及刺激性能的影响。通过对比实验,结果显示椰油酰水解燕麦蛋白钾对洁面膏的结膏温度和高温稳定性有明显的改善作用。通过罗氏泡沫仪测试泡沫量,结果显示椰油酰水解燕麦蛋白钾能增加洁面膏泡沫量和提升泡沫稳定性。通过偏光显微镜观察洁面膏料体外观,结果显示椰油酰水解燕麦蛋白钾有助于洁面膏形成更均一细腻的晶体。通过玉米醇溶蛋白试验法(zein test)测试洁面膏刺激性,结果显示椰油酰水解燕麦蛋白钾对洁面膏体系的刺激性有显著降低作用,使洁面膏更加温和。上述实验证明椰油酰水解燕麦蛋白钾对以椰油酰甘氨酸钠为主要表面活性剂的结晶型氨基酸洁面膏性能有一定的改善作用。

Assessing Density Functionals for Describing Methane Dissociative Chemisorption on Pt(110)-(2×1)Surface

In this work,we explore the suitability of several density functionals with the generalized gradient approximation(GGA)and beyond for describing the dissociative chemisorption of methane on the reconstructed Pt(110)-(2×1)surface.The bulk and surface structures of the metal,methane adsorption energy,and dissociation barrier are used to assess the functionals.A van der Waals corrected GGA functional(optPBE-vdW)and a metaGGA functional with van der Waals correction(MS PBEl-rVV10)are selected for ab initio molecular dynamics calculations of the sticking probability.Our results suggest that the use of these two functionals may lead to a better agreement with existing experimental results,thus serving as a good starting point for future development of reliable machine-learned potential energy surfaces for the dissociation of methane on the Pt(110)-(2×1)surface.

Travel of a mis-swallowed long spoon to the jejunum

Foreign-body ingestion is a relatively common presentation at emergency departments,but long metallic spoon swallowing is an infrequent occurrence.Unlike most cases of foreign-body ingestion,there have been no reported cases of long foreign bodies reaching the jejunum.We report a rare case of a coffee spoon that was swallowed accidentally and passed through the pylorus and duodenal loop and reached the jejunum,with no complications.