Mapping and measuring urban-rural inequalities in accessibility to social infrastructures

Equal access to social infrastructures is a fundamental prerequisite for sustainable development,but has long been a great challenge worldwide.Previous studies have primarily focused on the accessibility to social infras-tructures in urban areas across various scales,with less attention to rural areas,where inequality can be more severe.Particularly,few have investigated the disparities of accessibility to social infrastructures between urban and rural areas.Here,using the Changsha-Zhuzhou-Xiangtan urban agglomeration,China,as an example,we investigated the inequality of accessibility in both urban and rural areas,and further compared the urban-rural difference.Accessibility was measured by travel time of residents to infrastructures.We selected four types of social infrastructures including supermarkets,bus stops,primary schools,and health care,which were funda-mentally important to both urban and rural residents.We found large disparities in accessibility between urban and rural areas,ranging from 20 min to 2 h.Rural residents had to spend one to two more hours to bus stops than urban residents,and 20 min more to the other three types of infrastructures.Furthermore,accessibility to multiple infrastructures showed greater urban-rural differences.Rural residents in more than half of the towns had no access to any infrastructure within 15 min,while more than 60%of the urban residents could access to all infrastructures within 15 min.Our results revealed quantitative accessibility gap between urban and rural areas and underscored the necessity of social infrastructures planning to address such disparities.

THE ASSOCIATION OF Ala54Thr VARIANT OF INTESTINAL FATTY ACID BINDING PROTEIN GENE WITH GENERAL AND REGIONAL ADIPOSE TISSUE DEPOTS

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅａｄｕｌｔｃｏｍｍｏｎｍｅｔａｂｏｌｉｃｄｉｓｅａｓｅｓｓｕｃｈａｓｄｉａ－ｂｅｔｅｓｍｅｌｉｔｕｓ，ｄｙｓｌｉｐｉｄｅｍｉａ，ｃｏｒｏｎａｒｙｈｅａｒｔｄｉｓｅａｓｅａｎｄｈｙｐｅｒｔｅｎｓｉｏｎａｒｅｃｏｎｓｉｄｅｒ...

Mutual regulation between microRNA-373 and methyl-CpGbinding domain protein 2 in hilar cholangiocarcinoma

AIM:To investigate the reciprocal modulation between microRNA(miRNA) and DNA methylation via exploring the correlation between miR-373 and methyl-CpGbinding domain protein(MBD)2.METHODS:MiR-373 expression was examined using the TaqMan miRNA assay.Methylation of miR-373 was investigated using methylation-specific polymerase chain reaction,and recruitment of methyl binding proteins was studied using the chromatin immunoprecipitation assay.Mutation analysis was conducted using the QuikChange Site-Directed Mutagenesis kit.The activity of miR-373 gene promoter constructs and targeting at MBD2-three prime untranslated region(3'UTR) by miR-373 were evaluated by a dual-luciferase reporter gene assay.RESULTS:In hilar cholangiocarcinoma,miR-373 decreased and was closely associated with poor cell differentiation,advanced clinical stage,and shorter survival.The promoter-associated CpG island of miR-373 gene was hypermethylated and inhibited expression of miR-373.MBD2 was up-regulated and enriched at the promoter-associated CpG island of miR-373.Methylation-mediated suppression of miR-373 required MBD2 enrichment at the promoter-associated CpG island,and miR-373 negatively regulated MBD2 expression through targeting the 3'UTR.CONCLUSION:MiR-373 behaves as a direct transcriptional target and negative regulator of MBD2 activity through a feedback loop of CpG island methylation.

Soil restoration research advances of artificial sand-binding vegetation ecosystem in the Tengger Desert, Northern China

Soil plays an important role in desert ecosystem, and is vital in constructing a steady desert ecosystem. The management and restoration of desertified land have been the focus of much discussion. The soil in Shapotou desert region has developed remarkably since artificial sand-binding vegetation established in 1946. The longer the period of dune stabilization, the greater the thickness of microbiotic crusts and subsoil. Meanwhile, proportion of silt and clay increased significantly, and soil bulk density declinced. The content of soil organic matter, N, P, and K similarly increased. Therefore, soil has developed from aeolian sand soil to Calcic-Orthic aridisols. This paper discusses the effects brought about by dust, microbiotic soil crust and soil microbes on soil-forming process. Then, we analyzed the relation between soil formation and sand-binding vegetation evolution, in order to provide a baseline for both research on desert ecosystem recovery and ecological environment governance in arid and semi-arid areas.

Comparison of Different MARs(Matrix Attachment Regions) Effect on Transgene Expression

Three MARs(matrix attachment regions)fragments were cloned from tobacco(Nicotiana tabacum)(MAR1), yeast(Saccharomyces cerevisiae)(MAR3)and kidney bean(Phaseolus vulgaris)(MAR5)which ranged 984, 822 and 782bp, respectively. Sequence analysis showed that all thefragments had fairly high A/T content (73, 62 and 75%, respectively),harbored differentnumber and different type of some characteristic motifs of MARs, such as A-box and T-box,etc. The results of in vitro binding assay showed that the three MARs fragments derivedfrom different organisms could bind specifically to the matrix extracted from the tobacconuclei with different strength, which also demonstrated that these MARs fragments arefunctionally conserved during evolution. By using these MARs fragments to flank the β-glucuronidase (GUS) reporter gene and bialaphos resistance(bar) selectable marker gene,and then introducing the resulting plant expression vectors containing MARs-uidA-bar-MARs into tobacco through Agrobacterium mediated procedures, the effects of MARs sequenceson the expression of transgenes in tobacco were investigated and compared. The GUSactivity in individual transformants showed that, comparing to the controls withoutadditional MARs, the overall transgene expression level in transformants with MARs hadbeen greatly increased while the variations in transgene expression among transformantswere decreased in different degrees. In accordance with the results of sequence analysisand in vitro binding assay in which MAR1 fragment showed the strongest binding strength,this MARs fragment also showed the greatest effect in increasing transgene overallexpression level.

草鱼MHCⅠα基因克隆及其多态性特征分析

主要组织相容性复合体(MHC)是存在于脊椎动物染色体上、呈高度多态性的基因群,与机体的抗病性密切关系。MHCⅠ类分子由α链和β_(2m)微球蛋白组成,α链呈高度多态性。为探究草鱼MHCⅠα基因的多态性特征,本研究对3个草鱼个体的MHCⅠα基因进行克隆和测序,并使用生物信息学方法分析比较草鱼与小鼠、牛和鸡的MHCⅠα基因多态性特征。结果:共获得了5条草鱼MHCⅠα基因型序列,其基因编码332个氨基酸,包括信号肽、α1、α2、α3和TM/CY区域。草鱼MHCⅠα基因的氨基酸变异位点主要分布在α1和α2区域,与小鼠、牛和鸡MHCⅠα基因肽结合区(PBR)空间结构相似,多态性位点分布在抗原递呈的关键部位α螺旋或β折叠上。草鱼MHCⅠα基因的进化受自然环境的负向选择作用,而其他3个物种的进化方式均为正向选择。此外,草鱼MHCⅠα基因与其他脊椎动物亲缘关系较远,单独构成进化树上一大分支,且个体间继续分化为不同的亚支。本研究从基因层面阐述了草鱼MHCⅠα基因多态性特征和分子进化规律,为进一步探究低等脊椎动物MHCⅠα基因的生物学特征奠定基础。

Role of 3'-untranslated region translational control in cancer development, diagnostics and treatment

The messenger RNA 3'-untranslated region(3'UTR)plays an important role in regulation of gene expres-sion on the posttranscriptional level. The 3'UTR con-trols gene expression via orchestrated interactionbetween the structural components of mRNAs(cis-ele-ment) and the specific trans-acting factors(RNA bind-ing proteins and non-coding RNAs). The crosstalk ofthese factors is based on the binding sequences and/or direct protein-protein interaction, or just functionalinteraction. Much new evidence that has accumulatedsupports the idea that several RNA binding factors canbind to common mRNA targets: to the non-overlappingbinding sites or to common sites in a competitive fash-ion. Various factors capable of binding to the sameRNA can cooperate or be antagonistic in their actions.The outcome of the collective function of all factorsbound to the same mRNA 3'UTR depends on manycircumstances, such as their expression levels, affinity to the binding sites, and localization in the cell, which can be controlled by various physiological conditions. Moreover, the functional and/or physical interactions of the factors binding to 3'UTR can change the character of their actions. These interactions vary during the cell cycle and in response to changing physiological condi-tions. Abnormal functioning of the factors can lead to disease. In this review we will discuss how alterations of these factors or their interaction can affect cancer development and promote or enhance the malignant phenotype of cancer cells. Understanding these altera-tions and their impact on 3'UTR-directed posttran-scriptional gene regulation will uncover promising new targets for therapeutic intervention and diagnostics. We will also discuss emerging new tools in cancer di-agnostics and therapy based on 3'UTR binding factors and approaches to improve them.

Active regions' setting of the extracellular ligand-binding domain of human interleukin-6 receptor

The reliable three dimensional (3-D) structure of the extracellular ligand-binding domain (V106-P322) of human interleukin-6 receptor (hlL-6R) has been constructed by means of computer-guided homology modeling techniques using the crystal structure of the extracellular ligand-binding region (K52-L251) of human growth hormone receptor (hGHR) as templet. The space location of some key residues which influence the combination ability between the receptor and the ligand has been observed and the effects of point mutagenesis of the four conservative cysteine residues on the space conformation are analyzed. The results show that the space conformation of the side-chain carboxyl of E305 plays a key role in the ligand-binding ability. Furthermore, the space conformation of the side-chain carboxyl of E305 is very important for the electrostatic potential complementarity between hlL-6R and hlL-6 according to the docking method.

Ribotrap Analysis of Proteins Associated with FHL3 3'Untranslated Region in Glioma Cells

Objective To screen the proteins associated with four-and-a-half LIM domains 3(FHL3) 3' untranslated region(3'UTR) in glioma cells. Methods Western blot was adopted to detect the regulatory effect of poly(C)-binding protein 2(PCBP2) on FHL3. Biotin pull-down and sliver staining were employed to screen and verify the candidate binding proteins of FHL3 3'UTR. Then liquid chromatography-tandem mass spectrometry(LC-MS/MS) and molecule annotation system were used to identify and analyze the candidate binding proteins. Immunoprecipitation was conducted to study the interaction between PCBP2 and polypyrimidine tract-binding protein 1(PTBP1), a binding protein identified by LC-MS/MS. Results PCBP2 could bind to FHL3 mRNA 3'UTR-A and inhibited the expression of FHL3 in T98 G glioms cells. 22 candidate binding proteins were identified. Among them, there were 11 RNA binding proteins, including PCBP2. PTBP1 associated with FHL3 mRNA 3'UTR and interacted with PCBP2 protein. Conclusion PCBP2 and PTBP1 can both associate with FHL3 mRNA 3'UTR through forming a protein complex.

环境约束性指标的制度检视及法治优化

环境约束性指标在保护和改善环境、防治污染和其他公害乃至生态文明建设方面发挥着重要作用,且已形成总量约束与质量改善并重的指标体系、政策与法律协同的实施机制、问责与激励并举的考核制度,但同时也存在亟需纾解的结构性、实施性、机制性困境。因此,需要从顶层设计出发推进环境约束性指标的整体规范理念升级,健全指标执行考核评价机制,并探索建立区域协同执行机制,从而预防和避免“按指标治理”异化为“被指标治理”的过度规制悖论。

Low-affinity SPL binding sites contribute to subgenome expression divergence in allohexaploid wheat

Expression divergence caused by genetic variation and crosstalks among subgenomes of the allohexaploid bread wheat(Triticum aestivum.L.,BBAADD)is hypothesized to increase its adaptability and/or plasticity.However,the molecular basis of expression divergence remains unclear.Squamosa promoter-binding protein-like(SPL)transcription factors are critical for a wide array of biological processes.In this study,we constructed expression regulatory networks by combining DAP-seq for 40 SPLs,ATACseq,and RNA-seq.Our findings indicate that a group of low-affinity SPL binding regions(SBRs)were targeted by diverse SPLs and caused different sequence preferences around the core GTAC motif.The SBRs including the low-affinity ones are evolutionarily conserved,enriched GWAS signals related to important agricultural traits.However,those SBRs are highly diversified among the cis-regulatory regions(CREs)of syntenic genes,with less than 8%SBRs coexisting in triad genes,suggesting that CRE variations are critical for subgenome differentiations.Knocking out of Ta SPL7A/B/D and Ta SPL15A/B/D subfamily further proved that both high-and low-affinity SBRs played critical roles in the differential expression of genes regulating tiller number and spike sizes.Our results have provided baseline data for downstream networks of SPLs and wheat improvements and revealed that CRE variations are critical sources for subgenome divergence in the allohexaploid wheat.

运动疲劳损害大鼠空间认知能力并导致海马CA1区L-LTP抑制

目的:探讨运动疲劳对空间认知能力的影响及海马突触可塑性调控机制。方法:采用随机数字法将雄性SD大鼠分为对照组(control)和疲劳组(fatigue),选用3级递增负荷跑台训练方案,建立慢性力竭运动疲劳模型。利用Y迷宫空间识别记忆实验评估大鼠的空间识别和记忆变化,使用Western Blot测定海马组织cAMP反应元件结合蛋白(CREB)表达及磷酸化水平,并利用在体电生理记录大鼠海马CA1区晚期时相长时程增强效应(L-LTP),随后通过免疫组织化学染色观察大鼠海马CA1区小清蛋白(PV)的表达。结果:疲劳组大鼠在新异臂的停留时间比和在各臂的总穿梭次数均明显低于对照组(P<0.01)。高频刺激后30、60、120直至180 min,疲劳组大鼠海马CA1区场兴奋性突触后电位(fEPSP)斜率较对照组大鼠均显著降低(P<0.01)。Western Blot结果表明,疲劳组大鼠海马组织磷酸化CREB(p-CREB)水平明显低于对照组(P<0.05)。免疫组织化学染色显示,疲劳组大鼠海马CA1区PV表达下调(P<0.05)。结论:运动疲劳可导致大鼠空间认知能力受损,其机制可能与海马L-LTP抑制、CREB磷酸化水平降低以及PV阳性神经元减少有关。

丹参素对糖尿病肾病大鼠Notch1/免疫球蛋白κJ区重组信号结合蛋白/Msh同源异型基因2信号通路及钙磷代谢的影响

目的探讨丹参素通过调控Notch1/免疫球蛋白κJ区重组信号结合蛋白(RBP-Jκ)/Msh同源异型基因2(Msx2)信号通路对糖尿病肾病大鼠钙磷代谢的影响。方法2019年10月至2020年4月,北京维通利华实验动物科技有限公司购入SD大鼠,采用高糖高脂饲养4周、腹腔注射链脲佐菌素(STZ,40 mg/kg)建立糖尿病肾病大鼠模型。建模后按随机数字表法分为模型组、丹参素(低、中、高)剂量组(2.5 mL·kg^(-1)·d^(-1)、5.0 mL·kg^(-1)·d^(-1)、10.0 mL·kg^(-1)·d^(-1))、糖适平组(阳性对照,9.45 mL·kg^(-1)·d^(-1)),每组10只;对照组10只大鼠基础饲料饲养。给予相应的药物连续灌胃4周,1次/天。实验结束,观察大鼠一般情况;血糖仪检测空腹血糖(FBG)水平;24 h尿微量白蛋白(24 h尿mALB)试剂盒检测24 h尿mALB水平;全自动生化分析仪检测血清中钙、磷水平;苏木精-伊红(HE)染色检测大鼠肾脏组织形态;Von Kossa染色检测大鼠肾主动脉钙盐沉积情况;蛋白免疫印迹检测大鼠肾脏组织中Notch1、RBP-Jκ、Msx2、Jagged1、Notch1基因的胞内域(N1-ICD)蛋白水平。结果给药前,与对照组相比,造模组大鼠的FBG、24 h尿mALB水平升高(P<0.05)。给药后,模型组大鼠精神萎靡、活动减少,反应迟钝、眼神无力,多饮多食、排尿量增加、垫料易潮湿;出现肾小球肥大、基膜增厚现象,组织纤维化、炎症浸润明显;肾主动脉血管内膜、中膜弹性纤维间出现大量黑色颗粒,血管钙化严重。丹参素(低、中、高)给药组随着剂量的增加,大鼠活动逐渐恢复正常,反应迟钝减少,但仍有多饮多食、排尿量增加、垫料易潮湿现象;肾小球肥大、基膜增厚缓解,组织纤维化消失、炎症缓解;肾主动脉血管内膜、中膜弹性纤维间黑色颗粒减少,血管钙化稍缓解。与对照组相比,模型组FBG、24 h尿mALB水平,血清中钙[(2.89±0.14)mmol/L比(2.24±0.09)mmol/L]、磷[(3.48±0.28)mmol/L比(2.49±0.21)mmol/L]、钙×磷[(126.29±13.16)mg2/dL2比(71.06±13.48)mg2/dL2],肾脏组织中Notch1[(1.06±0.15)比(0.31±0.06)]、RBP-Jκ[(1.15±0.03)比(0.37±0.04)]、Msx2[(0.69±0.05)比(0.23±0.04)]、Jagged1、N1-ICD蛋白水平升高(P<0.05);与模型组相比,丹参素低剂量组24 h尿mALB水平,血清中钙、磷、钙×磷,肾脏组织中Notch1,RBP-Jκ、N1-ICD蛋白水平降低,丹参素(中、高)剂量组、糖适平组FBG、24 h尿mALB水平,血清中钙、磷、钙×磷,肾脏组织中Notch1、RBP-Jκ、Msx2、Jagged1、N1-ICD蛋白水平降低(P<0.05)。结论丹参素可通过调控Notch1/RBP-Jκ/Msx2信号通路发挥对糖尿病肾病大鼠钙磷沉积现象的改善。

Studies of substrate binding region of mEAAC1 and mASCT1 by constructing chimeras

The cDNA chimeras between two subtypes of mouse excitatory amino acid transporter family, mouse excitatory amino acid carrier 1 （mEAAC1） and mouse alanine serine cysteine transporter 1 （mASCT1）, were constructed by recombinant PCR. After transcription in vitro, the cRNA was injected and expressed in Xenopus laevis oocytes. 3H-Glu and 3H-Ser were used as isotopic tracer to measure the flux of amino acids. The results showed that there might not be the key amino acids responsible for substractive specificity in the NH2-terminal and its adjacent regions of these two transporters, which probably supported the formation of the substrata binding sites.

DPPA2/DPPA4在牛着床前胚胎发育过程中的作用及机制

多能发育相关因子2和4(developmental pluripotency-associated 2 and 4,DPPA2/DPPA4)是激活类2细胞期胚胎干细胞(2-cell-like embryonic stem cells,2CL ESCs)基因组的重要调控因子,同时调控胚胎干细胞的增殖。DPPA2/DPPA4在牛早期胚胎发育过程中的功能和机制尚不清楚。本研究利用RNA干扰技术结合胚胎显微注射技术敲低牛胚胎中的DPPA2/DPPA4后发现,与阴性对照组相比,敲低组中牛胚胎的8—16细胞阶段卵裂率和囊胚阶段囊胚率无显著差异,但是囊胚总细胞数、滋养层细胞数和内细胞团细胞数均显著减少(P<0.001、P<0.05、P<0.01)。进一步通过RNA测序(RNA-sequencing,RNA-Seq)分析发现,与阴性对照组相比,敲低组的晚期桑葚胚中,NOTCH信号通路的核心转录因子RBPJ(recombination signal binding protein gene for immunoglobulin kappa J region)的表达量显著下调(P<0.05),而本课题组前期实验证明,RBPJ敲低会导致牛早期胚胎的囊胚质量严重受损。本研究结果揭示了DPPA2/DPPA4在牛着床前胚胎发育中可能通过调节RBPJ的表达来影响细胞增殖。

Three-dimensional structure and function study on the active region in the extracellular ligand-binding domain of human IL-6 receptor

In this study the three-dimensional (3-D) model of the ligand-binding domain (V106-P322) of human interleukin-6 receptor (hlL-6 R) was constructed by computer-guided ho-mology modeling technique using the crystal structure of the ligand-binding domain (K52-L251) of human growth hormone receptor (hGHR) as templet. Furthermore, the active binding region of the 3-D model of hlL-6R with the ligand (hlL-6) was predicted. In light of the structural characteristics of the active region, a hydrophobic pocket shielded by two hydrophilic residues (E115 and E505) of the region was identified by a combination of molecular modelling and the site-directed or double-site mutation of the twelve crucial residues in the ligand-binding domain of hIL-6R (V106-P322). We observed and analyzed the effects of these mutants on the spatial conformation of the pocket-like region of hlL-6 R. The results indicated that any site-directed mutation of the five Cys residues (four conservative Cys residues: Cyst 21, Cys132, Cys165,

东亚文化版块视阈下中国内地与台湾地区书装回顾(1949—2019)

1949年以来,中国内地与台湾地区在装帧领域既有共性,也存在差异。进入20世纪后期,海峡两岸在装帧设计上展开密切交流,在东亚文化版块以及世界设计舞台上大放光彩。本文即对1949—2019年中国内地与台湾地区的装帧实践进行整体的回顾,反映海峡两岸在东亚文化版块中的交流与向外的传播,揭示两岸书籍设计师的共同使命。

CT、MRI影像表现联合血清PRDM14和S100P在胰腺病变性质判断及预后评估价值研究

目的探讨计算机断层摄影(CT)、磁共振成像(MRI)影像表现联合血清正性调节区锌指蛋白-14(PRDM14)和S100钙结合蛋白P(S100P)在胰腺病变性质判断及预后评估价值研究。方法选择2019年1月至2021年6月于内蒙古自治区人民医院行手术切除治疗并经病理证实的82例胰腺肿块患者,所有患者均行CT、MRI检查以及血清PRDM14、S100P检测,根据病理结果分为胰腺癌组(48例)和肿块型胰腺炎组(34例),比较两组间CT、MRI影像表现以及血清PRDM14、S100P的差异,并追踪胰腺癌患者1年内死亡情况,并分为死亡组(18例)和存活组(30例)。通过绘制受试者工作特征(ROC)曲线并计算曲线面积(AUC),分析CT、MRI影像表现联合血清PRDM14和S100P对胰腺癌的诊断价值以及预后评估价值。结果胰腺癌组病灶直径、动脉期及门脉期CT增值、ADC值、病灶存在钙化灶、假性囊肿、胆管穿透征以及右侧肾前筋膜增厚所占比例显著显著低于肿块型胰腺炎组(P<0.05);而胰腺癌组病灶呈分叶征、囊变坏死、DWI呈高信号、胆管与胰管分离征所占比例显著高于肿块型胰腺炎组(P<0.05);两组间胰腺体尾萎缩、胰管扩张、胆管扩张、双管征、胰周血管侵犯以及腹膜后淋巴结肿大所占比例差异均无统计学意义(P>0.05)。胰腺癌组患者血清PRDM14、S100P水平均显著高于肿块型胰腺炎组(P<0.05)。与CT、MRI影像表现、血清PRDM14、S100P水平单独诊断相比较,CT、MRI影像表现联合血清PRDM14、S100P水平诊断胰腺癌的AUC、敏感度、特异度最高。胰腺癌患者死亡组血清PRDM14、S100P水平显著高于存活组(P<0.05)。结论CT、MRI影像表现联合血清PRDM14、S100P水平对胰腺癌的鉴别具有更高的诊断价值,血清PRDM14、S100P水平还可有效评估胰腺癌患者预后情况,有助于进一步为胰腺癌患者的临床诊疗工作提供真实客观的诊断依据并有效评估其预后价值。

人MBL-CLR表达载体的构建及其在大肠杆菌中的表达

目的:在大肠杆菌中表达人甘露聚糖结合凝集素(MBL)胶原样区(CLR)蛋白。方法:应用PCR技术,从含中国人野生型MBLcDNA的质粒pGEM-MBL中扩增CLR基因片段,将其克隆至pET32a原核表达载体后,转化E.coliBL21(DE3)感受态菌株诱导表达CLR蛋白。通过Ni2+-NTA琼脂糖柱层析纯化目的蛋白,以SDS-PAGE、Westernblot和ELISA法进行鉴定。结果:从重组质粒pGEM-MBL中扩增到长约180bp的DNA片段。构建的重组表达载体经BamHI和HindⅢ酶切后出现约5900bp和180bp的片段,测序结果同预期的结果完全一致。重组质料在大肠杆菌中诱导表达后,纯化的蛋白经SDS-PAGE电泳出现Mr约为30000、60000和120000的3条带。Westernblot分析表明,3条蛋白带均可与抗His抗体起反应,3条蛋白带对应于融合蛋白的单体和寡聚体。ELISA检测证实,纯化的蛋白能与鼠抗重组人MBL蛋白抗体结合。结论:获得可表达人MBL-CLR的大肠杆菌菌株和重组的人MBL-CLR-Trx融合蛋白,为MBL分子结构、功能关系的进一步研究提供了条件。

多区域电网模型在线拼接与合并

介绍了一种基于公共信息模型(CIM)/可扩展置标语言(XML)电网模型和可缩放矢量图形(SVG),以及以联络线路为边界进行多区域电网模型在线拼接与合并的方法。针对各区域系统之间存在T接联络线的情形,提出通过T接分组的方式来解决由于虚拟站命名不统一而造成的T接点不易合并,以及线路信息频繁修改等问题。在模型的增量更新上,除了通过设备的统一命名来更新设备参数外,还通过运行库与待导入模型文件间的连接关系绑定实现模型连接关系的增量更新。通过模型的在线拼接与合并,所开发的电力保障自动化系统根据电网拓扑梳理出从380V到上级各级电源的供电路径,满足了"全链条式"的电网监视要求,最大限度地保障了对重要用户的可靠供电。