Expression of CD151 in Gastric Cancer Tissues and Its Clinical Significance

Objective:To explore the expression of CD151 in gastric cancer tissues and its clinical significance.Methods:Immunohistochemistry was employed to detect the expression of CD151 in gastric cancer tissues and adjacent normal tissues.The relationship between CD151 expression and the clinicopathological characteristics of gastric cancer was analyzed.Results:The expression of CD151 in gastric cancer tissues was significantly higher than in adjacent normal tissues(P<0.05).It was associated with the degree of differentiation,depth of invasion,lymph node metastasis,and TNM staging of gastric cancer.The survival time of patients with high CD151 expression was significantly shorter than that of those with low expression(P<0.05).Conclusion:High expression of CD151 in gastric cancer tissues is correlated with the malignant biological behavior of gastric cancer and can serve as an indicator for evaluating the prognosis of gastric cancer.

Optical and Mechanical Properties of Ramie Fiber/Epoxy Resin Transparent Composites

The residual resources of ramie fiber-based textile products were used as raw materials.Ramie fiber felt(RF)was modified by NaClO_(2) aqueous solution and then impregnated with water-based epoxy resin(WER).RF/WER transparent composite materials were prepared by lamination hot pressing process.The composite materials’color difference,transmittance,haze,density,water absorption,and mechanical properties were determined to assess the effects of NaClO_(2) treatment and the number of ramie fiber layers on the properties of the prepared composites.The results showed significantly improved optical and mechanical properties of the RF/WER transparent composites after NaClO_(2) treatment.With the increase of ramie fiber layers,the composites’whiteness,transmittance,and water absorption decreased while the haze increased.For material with three layers,the optical transmittance in the visible light region was 82%,and the haze was 96%,indicating the material has both high transmittance and high haze characteristics.The tensile strength increases with the increase of the number of layers,and the tensile strength of the composite with six layers is 243 MPa.This study broadens the scope of application of ramie fiber as a new option for home decoration materials.

Biomass production,nutrient cycling and distribution in age-sequence Chinese fir(Cunninghamia lanceolate)plantations in subtropical China

Biomass production and nutrient （N, P, K, Ca and Mg） accumulation, distribution and cycling were quantified in young, mature and over-mature （10-, 22-, and 34-year old） Chinese fir [Cunninghamia lanceolate （Lamb.） Hook] plantations in southern China. Total stand biomass of young, mature and over-mature stands was 38, 104 and 138 t ha-1 respectively. Biomass production increased significantly with age. Stem wood represented the highest percentage of stand biomass, accounting for 41, 55 and 63 % in the young, mature and over-mature plan- tations respectively. Nutrients concentration was highest in live needles and branches, and lowest in stem wood. The plantations accumulated more N, followed by K, Ca, Mg, and P. Nutrient return amount, nutrient utilization effi- ciency, nutrient turnover time, the ratio of nutrient return and uptake increased with stand age, which implies that young Chinese fir deplete soil nutrients to maintain growth, and efficiently utilize nutrients to decrease dependence on soil nutrients as they age. Harvesting young Chinese fir plantations would therefore lead to high nutrient loss, but prolonging the rotation length could improve soil recovery, and help sustain productivity in the long-term. Improved nutrient return through litterfall as stands get older may also be beneficial to nutrient pool recovery.

Dynamic behavior of coalbed methane flow along the annulus of single-phase production

Dynamic behavior of coalbed methane (CBM) flow will provide the theoretical basis to optimize production performance for a given well.A mathematical model is developed to simulate flowing pressures and pressure drops of CBM column from well head to bottom hole.The measured parameters and independent variables of flow rates,flowing pressures and temperatures are involved in CBM producing process along the annulus.The developed relationships are validated against full-scale measured data in single-phase CBM wellbores.The proposed methodology can analyze the dynamic behavior in CBM reservoir and process of CBM flow with an overall accuracy of 2%.The calculating process of flowing pressures involves friction factor with variable Reynolds number and CBM temperature and compressibility factor with gravitational gradients.The results showed that the effect of flowing pressure on CBM column was more obvious than that on CBM and water column accompanied by an increase of dynamic water level.The ratios of flowing pressure on increment of CBM column to the whole column increased with the declined flow rates of water column.Bottom-hole pressure declined with the decreased flowing pressure of CBM column along the annulus.It will lead to the results of the increased pressure drop of CBM column and CBM flow rate in single-phase CBM wellbores.

双重pH响应超轻度交联支化聚合物纳米材料的合成及对大黄素的载药应用

采用寡聚乙二醇甲基丙烯酸酯(OEGMA)、甲基丙烯酸二乙胺乙酯(DEAEMA)和原酸酯结构单元构建超轻度交联支化共聚物PODO及其纳米材料,并对大黄素(RE)的载药/释药进行了研究。PODO聚合物纳米材料的制备方法简单,无需自组装,且具有双重pH响应性:在中性水液中稳定,而在pH 5.5时,纳米颗粒会发生先变大后解离的双重响应过程。以大黄素为模型药物,进行了相关载药及pH响应释药研究,包载率达到35.2%。释药实验表明,在pH 7.0时,药物纳米颗粒相对稳定;在pH 5.5时,经48 h药物释放率达87%。

Integrated data analysis on the electron temperature profile of HL-2A with the Bayesian probability inference method

Data analysis on tokamak plasmas is mainly based on various diagnostic systems,which are usually modularized and independent of each other.This leads to a large amount of data not being fully and effectively exploited so that it is not conducive to revealing the deep physical mechanism.In this work,Bayesian probability inference with machine learning methods have been applied to the electron cyclotron emission and Thomson scattering diagnostic systems on HL-2A/2M,and the effects of integrated data analysis(IDA)on the electron temperature of HL-2A with Bayesian probability inference are demonstrated.A program is developed to infer the whole electron temperature profile with a confidence interval,and the program can be applied in online analysis.The IDA results show that the full profile of the electron temperature can be obtained and the diagnostic information is more comprehensive and abundant with IDA.The inference models for electron temperature analysis are established and the developed programs will serve as an experimental data analysis tool for HL-2A/2M in the near future.

Message from Editors

CURRENTLY,new technologies and applications are presenting both new challenges and new opportunities to the field of electric machines and motors.The continual dedicated effort of researchers is required to achieve the high-performance and high-reliability of electric machines while ensuring their cost-effectiveness.In motor design,with the advancements of optimization theory and technology,increasingly effective methods have been developed for the design of motors.

MRI联合不同扫描序列在胃癌术前分期诊断及化疗效果和预后的评估

目的观察常规MRI联合不同扫描序列在胃癌术前分期诊断及化疗效果、预后评估中的应用价值。方法选取2022年3月至2023年3月江苏省宝应县人民医院收治的82例胃癌患者为研究对象,均接受常规MRI联合不同扫描序列检查根据患者化疗效果分为有效组及无效组,根据患者预后分为转移组和未转移组。以术后病理结果为金标准,评估其对胃癌术前分期和化疗效果及预后的评估价值。结果常规MRI联合不同扫描序列诊断胃癌术前分期的准确率为89.02%(73/82)。有效组T2WI混杂高信号占比、肿瘤大小、ADC值明显低于无效组,转移组则明显高于未转移组(P<0.05)。T2WI混杂高信号占比、肿瘤大小、ADC值是胃癌患者化疗效果预后的独立影响因素(P<0.05)。常规MRI联合不同扫描序列检查的四项指标联合预测患者化疗效果的ROC曲线下面积为0.857,敏感性75.0%,特异性88.3%,95%CI0.797~0.904;预测患者预后的ROC曲线下面积为0.812,敏感性75.56%,特异性72.39%,95%CI0.755~0.861。结论常规MRI联合不同扫描序列对胃癌术前分期诊断的准确率较高,同时可评估患者化疗效果和预后。

The root structures of 21 aquatic plants in a macrophyte-dominated lake in China

Aims Aquatic plants play an important role in freshwater ecosystems.Previous works have largely focused on the functional significance of plant above ground parts,with much less attention on the root structures of aquatic plants.In this study,we divided 21 aquatic plants(including five introduced plants)into multiple plant groups(different life forms,monocot/eudicot and introduced/native)with the goal of addressing two questions:(i)what root structures do aquatic plants exhibit,and(ii)are there differences among these plant groups?Methods Twenty-one aquatic plants belonging to four life forms(free-float-ing,emergent,floating-leaved and submerged)were collected at the near flowering stage from a typical macrophyte-dominated lake in the yangtze River Basin,China.The following root topological parameters were quantified:altitude(a),path length(pe),magnitude(M),mean topological length(b),topological index(TI)and normed indices qa and qb.Important Findings The root topological indices TI,qa and qb for the 21 aquatic plants were 0.724±0.013,0.290±0.031 and 0.152±0.024(means±S.E.),respectively,revealing a general pattern of dichotomous branching,except for the aquatic root of Myriophyllum aquati-cum(Vell.)Verdc.,which displays herringbone branching.All three topological indices were significantly lower for monocots(TI=0.700±0.130,qa=0.191±0.149 and qb=0.086±0.236)than eudicots(TI=0.752±0.206,qa=0.405±0.569 and qb=0.229±0.393),indicating that the roots of monocots are typi-cally more dichotomous-like than those of eudicots.Among the four life forms,the three topological indices for emergent plants(TI=0.832±0.006,qa=0.616±0.018 and qb=0.381±0.014)were significantly higher than those of the other three life forms.Overall,there was no difference between the topological indices of introduced and native aquatic plants,but the introduced species M.aquaticum and Alternanthera philoxeroides(Mart.)Griseb.had both aquatic and edaphic roots as well as unusual functions,which may help explain their strong viability.

Overview of Advanced Control Strategies for Electric Machines

Control strategies play a key role for operation of electric machines,which would directly affect the whole system performance.In fact,different control strategies have been executed and explored for electric machines,which bring great impacts to industrial development and human society.This paper investigates and discusses the advantages control strategies for electric machines,including the field oriented control(FOC),direct torque control(DTC),finite control set model predictive control(FCS-MPC),sensorless control,and fault tolerant control(FTC).The corresponding control principles,control targets,fundamental approaches,advanced approaches,methodologies,merits and shortcomings are revealed and analyzed in detail.

Detection of Picric Acid by Terpy-Based Metallo- Supramolecular Fluorescent Coordination Polymers in Aqueous Media

The synthesis of two linear terpy-based metallo-supramolecular fluorescent coordination polymers through 1 ： 1 complexation of Zn^2＋ and Cd^2＋ ions with ditopic terpyridine ligand was reported. The dispersibility of P1 and P2 was significantly improved in organic solvent and water through the introduction of hydrophilic oligo-ethyoxy side chain. Two polymers displayed yellow light emission both in solution and the solid state due to the intra-ligand charge transfer （ILCT） between the d^10 metal ions and the conjugated spacer unit. These coordination polymers were explored as fluorescent chemosensors for detecting picric acid in aqueous media, displaying high sensitivity and good selectivity. In addition, test strips were prepared from these polymers and exhibited the practical potential of detecting the NACs pollutants in the outdoor water for public safety and security.

Single molecular insight into steric effect on C-terminal amino acids with various hydrogen bonding sites

Amino acids are basic units to construct a protein with the assistance of various interactions.During this building process,steric hindrance derived from amino acid side groups or side chains is a factor that could not be ignored.In this contribution,adsorption behaviors of C-terminal amino acid derivatives with amino acid residues fused in 3,4,9,10-perylenetetracarboxylic dianhydride were investigated by scanning tunneling microscopy(STM)and density functional theory(DFT)calculations at various liquid/solid interfaces.STM results at 1-phenyloctane/HOPG interface show that N,N'-3,4,9,10-perylenedicarboximide(GP)and N,N'-methyl-3,4,9,10-perylenedicarboximide(AP)formed linear and herringbone structures,respectively.The driving force could be attributed to different H-bonding sites induced by steric hindrance at side groups.N,N'-Benzyl-3,4,9,10-perylenedicarboximide(PP)generates both linear and herringbone structures because steric hindrance changes the H-bonding sites between PP molecules,whereas N,N'-isopropyl-3,4,9,10-perylenedicarboximide(LP)failed to be imaged because of strong steric hindrance coming from larger side group.To further investigate the impact of steric hindrance,we utilized octanoic acid(OA)as solvent to capture the adsorption details of LP and PP.We found that OA molecules drag PP and LP molecules in a different direction to generate linear structure,impeding the molecular rotation.The structure–solvent relationship shows that the steric hindrance is brought by the large side group,which makes it easier to recognize OA molecules at the interface.These results demonstrate that steric effect plays a significant role in altering interaction sites of the compounds during the adsorption process at the liquid/solid interface.

Efficient induction of neural progenitor cells from human ESC/iPSCs on Type I Collagen

A stable,rapid and effective neural differentiation method is essential for the clinical applications of human embryonic stem cells(ESCs)or induced pluripotent stem cells(iPSCs)in treating neurological disorders and diseases.Herein,we established a novel and robust monolayer differentiation method to produce functional neural progenitor cells(NPCs)from human ESC/iPSCs on Type I Collagen.The derived cells not only displayed the requisite markers,but also behaved similarly to classic NPCs both in vitro and in vivo.Upon transplantation into traumatic brain injury model,the derived NPCs facilitated recovery from injury.We also found that SMAD signaling stayed down throughout the differentiation process on Type I Collagen,and the pluripotent signals were rapidly downregulated along with raising up of neural early markers on the third day.Meanwhile,ATAC-seq data showed the related mediation of distinct transcriptome and global chromatin dynamics during NPC induction.Totally,our results thus provide a convenient way to generate NPCs from human ESC/iPSCs for neural diseases’treatment.

荆三棱在多等级基质异质性与水淹处理下的克隆表现

环境异质性可以影响克隆水生植物的表现。鲜有研究者关注两个层次的环境异质性并将其融入对克隆植物生态学的研究中。本研究的目的是:(1)检验不同基质异质性与水淹处理是否对植物表现产生相似效应,(2)探索克隆植物的觅食行为。本研究将荆三棱(Scirpus yagara)置于不同基质异质性与水淹处理之中。基质处理包括1个均质性基质处理(湖泥与沙等体积混合)与3个异质性基质处理(湖泥斑块与沙斑块交错构建的两斑块、四斑块与八斑块基质)。水淹处理包括:0、10和30 cm。本实验测量了克隆分株数、克隆代数、叶数、球茎数、克隆分株高度、茎长、根状茎长、克隆半径、间隔子长、间隔子厚度、总生物量、球茎生物量与单个球茎生物量等性状数据。研究结果表明,水位上升导致克隆分株数、克隆代数、叶数和球茎数显著减少,同时基质异质性造成间隔子长度与间隔子厚度的显著变化。水位与基质异质性两因子对克隆分株数、叶数和间隔子长度产生了显著的交互效应。在两斑块基质与四斑块基质中,荆三棱对湖泥斑块表现出显著的觅食行为,更多的构件被放置于湖泥斑块中。尤其在两斑块基质中,所有的构件被放置于湖泥斑块中。在八斑块基质中,荆三棱表现出双向觅食,这导致构件在不同斑块中的均匀放置。研究结果表明,荆三棱的觅食行为与斑块大小具有相关性。

克隆整合影响严重光胁迫下第一分株世代的生长和沉积物特征但不影响后续分株世代的生长和沉积物特征

克隆整合通过缓冲环境压力和提高资源获取效率使克隆植物受益。然而,在一个克隆系统中,受益于克隆整合的连接分株世代的数量很少受到关注。我们进行了一个盆栽实验来评估沉水植物苦草(Vallisneria natans)克隆系统内的生理整合程度,该克隆系统由一个母株和3个依次连接的后代分株组成。母株生长在正常光照下,而后代分株被严重遮荫。母株与后代分株间的匍匐茎被切断或保持连接,但3个后代分株之间的连接仍然存在。与遮荫的后代分株连接时,苦草未遮荫的母株的光合能力显著增强,但其生物量积累大大减少。克隆整合显著增加了第一分株世代(相邻分株)的生物量积累和土壤的碳氮可用性、胞外酶活性和微生物生物量,但没有增加后续分株世代的这些特征。我们的结果表明,在严重光胁迫下,来自苦草母株的支持可能仅限于克隆系统中相邻的后代分株,这暗示着一个分株世代的效应。我们的结果有助于更好地理解克隆植物的层次结构和分段化。这些发现表明克隆整合程度在分株种群的生态相互作用中起着至关重要的作用。

Optimizing environmental insulation thickness of buildings with CHP-based district heating system based on amount of energy and energy grade

The increase of insulation thickness(IT)results in the decrease of the heat demand and heat medium temperature.A mathematical model on the optimum environmental insulation thickness(OEIT)for minimizing the annual total environmental impact was established based on the amount of energy and energy grade reduction.Besides,a case study was conducted based on a residential community with a combined heat and power(CHP)-based district heating system(DHS)in Tianjin,China.Moreover,the effect of IT on heat demand,heat medium temperature,exhaust heat,extracted heat,coal consumption,carbon dioxide(CO_(2))emissions and sulfur dioxide(SO_(2))emissions as well as the effect of three types of insulation materials(i.e.,expanded polystyrene,rock wool and glass wool)on the OEIT and minimum annual total environmental impact were studied.The results reveal that the optimization model can be used to determine the OEIT.When the OEIT of expanded polystyrene,rock wool and glass wool is used,the annual total environmental impact can be reduced by 84.563%,83.211%,and 86.104%,respectively.It can be found that glass wool is more beneficial to the environment compared with expanded polystyrene and rock wool.

Reprogramming somatic cells to cells with neuronal characteristics by defined medium both in vitro and in vivo

Background:Currently,direct conversion from somatic cells to neurons requires virus-mediated delivery of at least one transcriptional factor or a combination of several small-molecule compounds.Delivery of transcriptional factors may affect genome stability,while small-molecule compounds may require more evaluations when applied in vivo.Thus,a defined medium with only conventional growth factors or additives for cell culture is desirable for inducing neuronal trans-differentiation.Results:Here,we report that a defined medium(5C)consisting of basic fibroblast growth factor(bFGF),N2 supplement,leukemia inhibitory factor,vitamin C(Vc),andβ-mercaptoethanol(βMe)induces the direct conversion of somatic cells to cells with neuronal characteristics.Application of 5C medium converted mouse embryonic fibroblasts(MEFs)into TuJ+neuronal-like cells,which were capable of survival after being transplanted into the mouse brain.The same 5C medium could convert primary rat astrocytes into neuronal-like cells with mature electrophysiology characteristics in vitro and facilitated the recovery of brain injury,possibly by inducing similar conversions,when infused into the mouse brain in vivo.Crucially,5C medium could also induce neuronal characteristics in several human cell types.Conclusions:In summary,this 5C medium not only provides a means to derive cells with neuronal characteristics without viral transfection in vitro but might also be useful to produce neurons in vivo for neurodegenerative disease treatment.

Generic predictive model calibration for PMSMs with different topologies

The main difficulty in designing predictive controllers for permanent magnet motors with different topologies is the control of the additional current subspaces.The frequency of current components in these additional subspaces(harmonic subspaces and zero-sequence loop/subspaces)is several times the fundamental current frequency.Moreover,the inner voltage source would vary with operation conditions,and there are also different views about the causes of inner voltage sources.This paper analyses the inner voltage sources in these additional current subspaces for permanent magnet motors with different drive topologies using simulation and experiment.Based on the results of the simulations and experiments,we analyze the sources and characteristics of the inner voltage sources and provide a predictive model calibration method for the components in these additional subspaces.Finally,the deadbeat current control scheme based on calibrated look-up table is designed and verified.