叠后地质统计学反演在H地区储层预测中的应用

H地区A3层是珠江口盆地惠州凹陷寻找岩性圈闭最有利的地区之一,但A3层砂岩厚度薄,叠后地震资料和常规叠后确定性反演结果纵向分辨率低,难以准确识别砂岩的尖灭位置和平面展布。采用叠后地质统计学反演方法,利用地质、测井、地震等信息和贝叶斯概率密度函数建立统计学模型,同时结合马尔科夫链-蒙特卡洛算法进行随机模拟,得到了高精度、高分辨率的反演阻抗体和岩性体;相比于常规确定性反演,地质统计学反演结果高频细节更清晰,分辨率提高了一倍,有效识别出了A3层薄层砂岩的走向和尖灭位置,为H地区岩性油藏的储层预测提供了重要依据。

Meta-analysis of Barrett's esophagus in China

AIM:To investigate the epidemiology and characteristics of Barrett’s esophagus(BE)in China and compare with cases in the west.METHODS:Studies were retrieved from the China National Knowledge Infrastructure and PubMed databases using the terms"Barrett"and"Barrett AND China",respectively,as well as published studies about BE in China from 2000 to 2011.The researchers reviewed the titles and abstracts of all search results to determine whether or not the literature was relevant to the current topic of this research.The references listed in the studies were also searched.Inclusion and exclusion criteria for the literature were appropriately established,and the data reported in the selected studies were analyzed.Finally,a meta-analysis was performed.RESULTS:The current research included 3873 cases of BE from 69 studies.The endoscopic detection rate of BE in China was 1%.The ratio of male to female cases was 1.781 to 1,and the average age of BE patients was 49.07±5.09 years.Island-type and shortsegment BE were the most common endoscopic manifestations,accounting for 4.48%and 80.3%,respectively,of all cases studied.Cardiac-type BE was observed in 40.0%of the cases,representing the most common histological characteristic of the condition.Cancer incidence was 1.418 per 1000 person-years.CONCLUSION:Average age of BE patients in China is lower than in Western countries.Endoscopic detection and cancer incidence were also lower in China.

The association of lumican polymorphisms and high myopia in a Southern Chinese population

AIM：To investigate the correlation between lumican（LUM）gene and high myopia in a Southern Chinese population.METHODS：The study comprised of 95 high myopia patients with a spherical equivalent≤-6.5 diopters（D）.The control group recruited 95 individuals with a spherical equivalent ranging from-0.5 D to＋0.5 D.Direct sequencing was used to detect the single nucleotide polymorphisms（SNPs）of LUM gene in coding region.Genotype distributions were tested for Hardy-Weinberg disequilibrium.Genotypic and allelic frequencies were analyzed through Chi-square test or Fisher’s exact test.RESULTS：We identified 3 SNPs of the LUM gene：LUM c.32（rs577456426）,LUM c.507（rs17853500）and LUM c.849（rs181915277）.Among the three SNPs,the genotype and allele frequencies of rs17853500 showed a significant difference between patients and control subjects（P〈0.05）.However,there were no significant differences in rs181915277and rs577456426 between the two groups（P〉0.05）.CONCLUSION：LUM c.507 polymorphism may be a risk factor for the pathogenesis of high myopia in the Southern Chinese population.

Comparison of trabeculectomy and trabeculectomy with amniotic membrane transplantation in the same patient with bilateral glaucoma

AIM:To observe effects of trabeculectomy with amniotic membrane transplantation(AMT) in controlling postoperative intraocular pressure(IOP) in patients with medically uncontrolled glaucoma.·METHODS:This study included adult patients with requiring bilateral glaucoma surgery.Each patient underwent trabeculectomy(Non-AMT group) in one eye and with AMT(AMT group) in the other eye according to randomized principle.Success was defined as intraocular pressure(IOP) 【21mmHg without any anti-glaucoma medications at 24 months follow-up.The two groups were compared in terms of IOP,complications and success rate.·RESULTS:Thirty-four eyes of 17 patients were investigated in this study.There was no statistically signifcant difference in pre-operative IOP between the two groups.The mean IOP was lower in AMT group compared with Non-AMT group on follow up months 12,18,and 24.Postoperative complications were more frequent in Non-AMT group(35.3%,6/17) compared with AMT group(5.9%,1/17).The success rate of surgery was88.2%(15/17) in Non-AMT group and 100%(17/17) in AMT group.·CONCLUSION:Trabeculectomy with AMT is an effective procedure to reduce IOP and complications,thereby improving surgical success rates.

Mechanical Properties and Microcosmic Properties of Self-Compacting Concrete Modified by Compound Admixtures

It has become a research hotspot to explore raw material substitutes of concrete.It is important to research the mechanical properties of self-compacting concrete(SCC)with slag powder(SP)and rubber particle(RP)replacing cement and coarse aggregate,respectively.12 kinds of composite modified self-compacting concrete(CMSCC)specimens were prepared by using 10%,20%and 30%SP and 30%,40%,50%and 60%RP.The rheological properties,mechanical properties and microstructure of the CMSCC were investigated.Results indicate that the workability,compressive strength,splitting tensile strength and flexural strength of CMSCC prepared by 20%SP and less than 40%RP are improved.In order to maximize the utilization of waste materials,20%SP and 40%RP can be used as the optimal ratio of the combined modifier.The microstructure shows that the addition of proper amount of SP is conducive to the formation of increasingly more uniform C-S-H gel.C-SH gel can fill the internal pores of the sample and enhance the adhesion between the aggregate,thus improving the mechanical properties of CMSCC.RP has a rougher surface and lower density and stiffness,which inhibits the workability and mechanical properties of CMSCC.The above research results have important theoretical and practical significance for the selection of raw materials of self-compacting concrete and the rational use of industrial wastes.

Construction of adenovirus vectors encoding the lumican gene by gateway recombinant cloning technology

AIM： To construct adenovirus vectors of lumican gene by gateway recombinant cloning technology to further understand the role of lumican gene in myopia. METHODS： Gateway recombinant cloning technology was used to construct adenovirus vectors. The wild-type （wt） and mutant （mut） forms of the lumican gene were synthesized and amplified by polymerase chain reaction （PCR）. The lumican cDNA fragments were purified and ligated into the adenovirus shuttle vector pDown- multiple cloning site （MCS）-/internal ribozyme entry site （IRES）/enhanced green fluorescent protein （EGFP）. Then the desired DNA fragments were integrated into the destination vector pAV.Desld yielding the final expression constructs pAV.Exld-CMV〉wt-lumican/IRES/ EGFP and pAV.Exld-cytomegalovirus （CMV） 〉mutlumican/IRES/EGFP, respectively.RESULTS： The adenovirus plasmids pAV.Exld-CMV〉 wt-lumican/IRES/EGFP and pAV.Exld-CMV 〉mutlumican/IRESlEGFP were successfully constructed by gateway recombinant cloning technology. Positive clones identified by PCR and sequencing were selected and packaged into recombinant adenovirus in HEK293 cells. CONCLUSION： We construct adenovirus vectors containing the lumican gene by gateway recombinant cloning technology, which provides a basis for investigating the role of lumicangene in the pathogenesis of high myopia.

Measurement of He2* density with an auxiliary measuring electrode in atmospheric pressure plasma jet

In this study, the density of metastable He2* in an atmospheric-pressure plasma jet operating in helium with 0.001% nitrogen has been measured using an auxiliary measuring electrode technique.In the glow discharge mode, waveforms from two grounding electrodes, including one main discharge electrode and one auxiliary electrode, are captured.The isolated current peak formed by Penning ionization in waveforms from the auxiliary measuring electrode is identified to calculate the density of metastable He2*.In our discharge environment, the helium metastable densities along the jet axis direction are between 2.26×1013 and 1.74×1013 cm-3,which is in good agreement with the results measured by other techniques.This measurement technique can be conveniently applied to the diagnosis of metastable He2* in an atmospheric-pressure plasma jet array.

Comparison of conventional and directional freezing for the cryopreservation of human umbilical vein endothelial cells

AIM:To compare conventional slow equilibrium cooling and directional freezing(DF) by gauze package for cryopreservation of human umbilical vein endothelial cells(HUVECs).METHODS:HUVECs were randomly assigned to conventional freezing(CF) and DF by gauze package group. The two groups of HUVECs were incubated with a freezing liquid consisting of 10% dimethylsulfoxide(DMSO), 60% fetal bovine serum(FBS) and 30%Dulbecco’s modified Eagle’s medium(DMEM) and then put into cryopreserved tubes. CF group, slow equilibrium cooling was performed with the following program:precool in 4℃ for 30 min,-20℃ for 1h, and then immersion in-80℃ refrigerator. DF group, the tubes were packaged with gauze and then directional freezing in-80℃ refrigerator straightly. One month later, the vitality of HUVECs were calculated between two groups.RESULTS:There was no significant difference in the survival rate and growth curve between CF and DF groups. The DF group was significantly better than CFgroup in adherent rates, morphological changes and proliferative ability.CONCLUSION:In the conventional cryopreserved method, cells are slow equilibrium cooling by steps(4℃,-20℃ and finally-80℃), which is a complicated and time-consuming process. But the improved DF by gauze package method is better than conventional method, for which is convenient and easy to operate.

The association of LOXL1 polymorphisms with exfoliation syndrome/glaucoma: Meta-analysis

AIM: To investigate the association of lysyl oxidaselike 1(LOXL1) single nucleotide polymorphisms(SNPs)with exfoliation syndrome(XFS)/exfoliation glaucoma(XFG).METHODS: Published manuscripts from Pub Med and EMBASE were identified until May 2014. Summary odds ratios(ORs) and 95% confidence intervals(CIs) for LOXL1(rs1048661, rs2165241 and rs3825942) polymorphisms and the risk of XFS/XFG were estimated using random-or fixed- effect model.· RESULTS: The three LOXL1 polymorphisms(rs1048661, rs3825942, and rs2165241) were associated with an increased risk for XFS/XFG among Caucasians,with OR 2.19(1.96-2.45), 8.8(6.05-12.79) and 3.41(3.11-3.73), respectively. On the contrast, the rs1048661 and rs2165241, but not rs3825942 polymorphism, have a potential protective effect on XFS/XFG in Asians, with OR0.06(0.02-0.18), 0.15(0.09-0.25), respectively.CONCLUSION: There is strong evidence that LOXL1 polymorphisms are associated with XFS/XFG risk. The strength of risk might be ethnicity-dependent.

集钙蛋白1相关肌病患者1例的基因变异分析

目的:对1例骨骼肌活检以空泡及类似管聚集现象为特征性表现的肌病患者进行基因变异分析,明确其遗传学病因。方法:以。年。月。日就诊于河北医科大学第三医院的1例肌病患者作为研究对象。对患者进行高通量测序,并通过Sanger测序对结果进行验证。结果:高通量测序显示患者集钙蛋白-1(calsequestrin-1,CASQ1)基因存在c.730G>C(p.D244H)杂合变异,其父母均未携带相同的变异。根据美国医学遗传学与基因组学学会相关指南,判定该变异为致病性(PS1+PM2+PP3)。结论:CASQ1基因c.730G>C(p.D244H)杂合错义变异可能是本研究患者的遗传学病因,新变异的检出丰富了CASQ1基因的变异谱。

Emery-Dreifuss型肌营养不良8例的临床、病理及分子生物学分析

目的总结Emery-Dreifuss型肌营养不良(EDMD)患者的临床、电生理、骨骼肌磁共振成像(MRI)、骨骼肌病理及分子生物学特点,以提高对本病的认识和诊治水平。方法收集于2011—2022年就诊于河北医科大学第三医院且经基因检查确诊的8例EDMD患者的临床资料,回顾性总结其临床症状、电生理改变(肌电图及心电图)、骨骼肌MRI、骨骼肌病理及基因突变特点。结果本组患者发病年龄为2.0~6.0(3.6±1.2)岁,均为隐匿起病,进行性加重。7例以肌无力为首发症状,表现为走路摇摆、蹲起费力、上楼困难;逐渐出现脊柱强直、关节挛缩;1例以脊柱侧弯为首发症状。4例发现异常心电图。8例肌电图符合肌源性损害。肌肉活组织检查病理结果呈肌病病理改变或肌营养不良表现。8例EDMD患者经二代测序均发现致病突变,共6个点突变,其中4个LMNA基因杂合突变(c.1583C>G、c.1357C>T、c.148C>T、c.1336A>G);1例为EMD基因半合子突变(c.501C>G);1例为SYNE1基因杂合突变(c.4364G>A)。结论EDMD具有高度临床、遗传异质性。儿童期发病,病程早期以下肢无力、走路姿势异常为首发表现;肌电图呈肌源性损害;骨骼肌MRI可见选择性脂肪浸润;肌活组织检查结果缺乏特征性病理表现。病程早期仅凭临床表现和辅助检查诊断及鉴别诊断均较困难。二代测序技术可提高EDMD的早期诊断率。

81例强直性肌病的临床、病理和分子生物学研究

目的 探讨强直性肌病的临床、病理和分子生物学特点,为提高临床诊治水平提供依据。 方法 回顾性分析河北医科大学第三医院神经肌肉病科自2005年6月至2018年6月收治的81例强直性肌病患者的临床、骨骼肌活检病理特点,以及其中55例患者经分子生物学方法明确的致病基因。 结果 (1)81例患者中强直性肌营养不良(DM)47例,非萎缩性肌强直(NDM)34例。(2)DM患者切片病理染色中多见特征性的中心核、核聚集和肌浆块,伴纤维变性、坏死;NDM缺乏特征性病理改变。(3)基因分析患者中DM1型患者32例,DM2型患者3例;先天性肌强直(MC)9例,先天性副肌强直(PC)5例,6例未能明确分型。共发现7个CLCN-1新发致病突变位点和3个SCN4A新发致病突变位点。 结论 (1)强直性肌病是一组复杂的单基因遗传病,肌强直为共同特征性表现,可出现多系统受累;(2)骨骼肌活检病理分析是诊断与鉴别诊断的重要方法,基因分析是其诊断和分型诊断的金标准。

远端肌无力中性脂质沉积症一家系报告

目的通过报道远端肌无力中性脂质沉积症一家系临床、病理特点并结合文献复习,探讨该病诊断、鉴别诊断要点.方法收集2008年1月就诊于我科的远端肌无力中性脂质沉积症一家系中2例患者的临床资料以及电生理检查和骨骼肌活体组织病理检查结果,提取DNA行基因检测,同时复习相关文献.结果本家系中2例患者为同胞姐妹,临床表现相似,均于30岁后发病,临床以四肢远端无力、肌肉萎缩为主要表现;血肌酸激酶均升高（分别为1067、740U/L）.肌电图检查均呈肌源性损害.骨骼肌活体组织病理检查,多数肌纤维内可见大量脂滴沉积.二代测序发现PNPLA2基因c.187＋1G〉A纯合剪切突变.结论本组2例中性脂质沉积症伴肌病患者以肢体远端无力发病,应与远端肌病相鉴别.肌肉活体组织检查发现肌纤维胞质中存在大量脂滴可确诊该病.二代测序有助于脂质沉积性肌病的分型诊断.

肌病型极长链酰基辅酶A脱氢酶缺乏症二例

报道2例肌病型极长链酰基辅酶A脱氢酶缺乏症患者,临床均主要表现为反复横纹肌溶解症。例1伴波动性肌无力、肌痛,骨骼肌活组织检查病理均可见少量变性和坏死肌纤维,部分肌纤维脂肪成分轻度增高,二代测序发现ACADVL基因复合杂合突变。例2行串联质谱检测示多种酰基肉碱增高,游离肉碱减低。由此可见,临床表现发作性肌无力、肌痛和反复横纹肌溶解症需要考虑肌病型极长链酰基辅酶A脱氢酶缺乏症可能,下肢肌肉MRI和骨骼肌活组织检查病理无特异性表现,应与其他代谢性肌病相鉴别,串联质谱检测和二代测序有助于诊断和鉴别诊断。

鼠疫菌EV76株BAC基因组文库的构建

目的构建鼠疫EV76株基因组BAC文库,为对鼠疫菌的分子变异、活菌疫苗的安全性等方面的研究奠定基础。方法凝胶包埋裂解法获得完整的鼠疫菌基因组,经HindⅢ部分酶切至50 kb～300 kb大小片段,连接载体pCC1BAC后,电转化于E.coli EPI300感受态,经氯霉素抗性、蓝白斑筛选得到阳性克隆,并对文库进行连接转化效率、稳定性、同源性等技术检测。结果所建文库各项指标符合预期,文库构建成功。结论鼠疫菌EV76株文库的成功构建,将为鼠疫的功能研究和疫苗稳定性的检测监控提供有力的依据。

地应力测量及其对油气运移和断层封堵性影响的发展现状与趋势

地应力是地下地质结构发生改变的主要影响因素,是断层活动的主要驱动力.它的大小、方向、作用效果等直接决定了断层是否具有封闭性,能否对其周围的油气进行封堵,从而确定油气开发的有利区带.为了更清楚地认识地应力以及其对油气运移的作用,本文首先对地应力的测量方法进行分类和总结,阐述不同测量方法的工作原理、使用条件以及各自的优缺点;其次通过压实成岩程度、充填胶结作用和泥岩涂抹影响对断层封堵性进行了定性的分析和阐述;从测井资料计算法、地层模型计算法、断面虚拟井法、泥岩涂抹势CSP法与页岩涂抹因子SSF法、SGR法与ESGR法等方法的角度出发对断层封堵性进行了定量分析阐述;然后分析了地应力测量、断层封堵性对油气运移影响的发展现状与趋势;最后结合当今世界发展局势对地应力和油气工程的发展前景进行展望,说明地应力对工程实施,油气开采以及安全生产保障的重要意义.

地震波射线追踪方法综述--方法、分类、发展现状与趋势

地震波的走时与射线路径是地震数据处理技术中重要的参数,它们的计算精度、效率、稳定性等特性直接决定着偏移成像、层析成像、速度分析等地震数据处理技术的各种特性.为了更加清楚地认识、发展和利用这一类方法,本文首先对地震波射线追踪问题进行了简要概述;其次,阐述了主要的射线追踪方法的相关内容;然后,对射线追踪方法进行了分类;最后,详细阐述了射线追踪的发展现状与趋势,并给出相应的结论与讨论.

asy and asyip:A new type of apoptosis-inducing gene

Apoptosis,,a wide physiological process in multicel-lular organisms, is critical for the organ development, the cell senescence, the tissue homeostasis and the resistance to infection of virus and bacteria. Apoptosis plays a key role in the regulation of the growth cell number such as the tissue construction, the elimination of abnormal or dangerous cells. Therefore, apoptosis is a stringent and effective cell quality controlling system, which reduces the number of harmful cells to the maximum, such as auto-immunity cell, cells infected by virus, tumor cells by cell suicide111. Apoptosis can be initiated by a wide variety of the extracellular and intracellular stimuli, including the developmental signals, the cellular stress and the disruption of cell cycle, transduced and amplified by the second messengers, and finally finished by the activating death effector protease. This process can be called apoptosis signal network. The defective in control of the apoptotic pathways may contribute to a variety

Demand dispatch in cyber-physical load aggregation system with multilevel incentives

This paper presents a demand dispatch strategy of aggregated electric water heaters(EWHs) for a load aggregation system at demand side, based on the theory of cyber-physical system. The objective is to solve the problem of water heater load control when the cyber-physical load aggregation system participates in demand dispatch of the power grid. First, an implementation framework of the demand dispatch strategy is designed between the cyber space and the physical space, including state awareness,real-time analysis, scientific decision-making and precise execution. Second, a multilevel incentive model, an EWH appliance model and a thermostat setpoint control rule are introduced. Next, based on the models and the rule, the state awareness logic, real-time analysis logic, scientific decision-making logic and precise execution logic of the strategy are designed to implement demand dispatch of aggregated EWHs. Finally, simulation results confirm the effectiveness, the advantage and excellent scalability of the proposed strategy.

SIN3B promotes integrin αV subunit gene transcription and cell migration of hepatocellular carcinoma

Paired amphipathic helix protein (SIN3B) is a transcription corepressor for many genes. Here we show a different regulation mechanism of integrin aV gene expression by SIN3B in human hepatocellular carcinoma (HCC). We first observed a close relationship between Integrin aV and SIN3B expressions in HCC patients and tumor cell lines with different metastatic potentials. Overexpression of SIN3B significantly accelerated the cell migration rate of SMMC-7721, but failed when integrin αV expression was silenced. Interestingly, SIN3B stimulated integrin aV subunit promoter activity only in the presence of sulfatide. Importantly, SIN3B was identified in the complex with sulfatide by mass spectrometry. Fat blot assay indicated that SIN3B specifically interacted with sulfatide. Molecular modeling suggested that sulfatide induced the conformational change of SIN3B from compacted α-helices to a relaxed β-sheet in PAH2 domain. The data of immunoprecipitation and ChIP assay indicated that altered SIN3B lost the binding affinity with MAD1 and HDAC2, which reduced the recruitment of HDAC2 on integrin aV gene promoter and prevented the deacetylation of the histone 3. In conclusion, this study demonstrated that SIN3B promoted the transcriptional activation of the integrin αV subunit gene promoter by reducing interaction with HDAC2.