SEF

SEF
  • 文章类型: Journal Article
    建筑信息建模(BIM)一种新的概念和方法,最近受到了很多关注。各种结构工程公司(SEF)在部署后都观察到了可观的竞争优势。BIM提供了广泛的优势,但是它的能力甚至没有被完全利用。坚定实施的挑战,需要对公司业务结构进行重大改变的程序,是其中的一个主要因素。然而,围绕BIM在企业中的应用研究的评价和整合研究还没有很多深入的研究。为了解决规划阶段的复杂性,这使得在这些工作场所实施BIM具有挑战性,本文提供了一个在SEF中部署BIM的框架。此外,一种全新的混合非洲布法罗和非洲秃鹰优化(AB-AVO)已经创建,以评估技术状态。SEF中BIM执行建议的技术显然和有效地识别了公司的期望和资源,列出了创建BIM技术所需的需求,并为监测和计划执行提供技术和临床建议。它按资源利用率分类,多功能性,和适应性。•本文介绍了使用BIM的新概念和方法•SEF中BIM执行建议的技术明显有效地识别了公司的期望和资源•该方法为结构公司在监控中采用BIM建立了指导方针,并计划执行。
    Building Information Modelling (BIM), a new concept and methodology, has received much attention lately. Various Structural Engineering Firms (SEFs) have observed substantial competitive benefits after its deployment. BIM offers a wide range of advantages, but its capacity has not even been completely exploited. The challenges of firm implementation, a procedure that necessitates significant alterations in firm business structure, are a major factor in this. However, there hasn\'t been much in-depth research on the assessment and integration of the research around the application of BIM in firms. To address the planning phase\'s complexity, which makes implementing BIM in these workplaces challenging, this article provides a framework for BIM deployment in the SEF. Additionally, a brand-new hybrid African Buffalo and African Vulture Optimization (AB-AVO) has been created to assess the state of technology. The technique suggested for BIM execution within SEF obviously and effectively recognises the firm\'s expectations and resources, sets out the needs required to create the BIM technique, and offers technical and clinical suggestions for monitoring and planning the execution. It is categorised by resource utilization, versatility, and adaptability.•This paper introduces a new concept and methodology of using BIM•The technique suggested for BIM execution within SEF obviously and effectively recognises the firm\'s expectations and resources•The method establishes guidelines for structural firm to adopt BIM in their monitoring, and planning the execution.
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  • 文章类型: Journal Article
    背景低级别纤维粘液样肉瘤(LGFMS)和硬化性上皮样纤维肉瘤(SEF)是两种罕见但侵袭性软组织肉瘤,由于组织病理学相似性,难以区分。本研究检查了粘蛋白4(MUC4)的诊断能力,跨膜粘蛋白,识别不同类型的肉瘤,并扩大其评估范围,以包括广泛的肉瘤。方法使用小鼠抗MUC4单克隆抗体对来自各种肉瘤的组织样品进行免疫组织化学(IHC)检查。在用小鼠抗MUC4单克隆抗体进行压力锅抗原恢复后,在4mm厚的福尔马林固定的石蜡包埋的组织切片上进行IHC。结果MUC4在SEF(n=13)和LGFMS(n=10)中高表达,而滑膜肉瘤的局灶性阳性(n=1)。其他肉瘤,如恶性周围神经鞘瘤,纤维肉瘤,平滑肌肉瘤,脂肪肉瘤,和粘液纤维肉瘤,未表现出表达(n=0)。这些发现与先前的研究一致,并且支持MUC4特异性作为SEF和LGFMS标志物。这项研究提供了有关MUC4的诊断功效的信息,特别是在某些亚型的情况下。它不仅有助于我们理解这些独特的实例,但它也为软组织肉瘤的组织病理学和IHC发现提供了背景。此外,这项研究调查了年龄和性别对一系列肉瘤中MUC4表达的影响,这在文献中通常被研究不足,发现与MUC4的表达没有关系。结论总之,这项研究通过强调MUC4在某些肉瘤亚型中的关键作用,同时承认肉瘤景观的复杂多样性,增加了我们对软组织肉瘤的理解。需要进一步的研究来了解控制标记表达模式的分子机制,以及治疗意义。
    Background Low-grade fibromyxoid sarcoma (LGFMS) and sclerosing epithelioid fibrosarcoma (SEF) are two rare but aggressive soft tissue sarcomas that can be difficult to distinguish due to histopathological similarities. The present study examines the diagnostic capacities of mucin-4 (MUC4), a transmembrane mucin, in identifying different types of sarcomas and broadens its evaluation to include a wide range of sarcomas. Methods Immunohistochemical (IHC) examination of tissue samples from various sarcomas was performed using a mouse anti-MUC4 monoclonal antibody. IHC was conducted on 4-mm thick formalin-fixed paraffin-embedded tissue sections after pressure cooker antigen retrieval with a mouse anti-MUC4 monoclonal antibody. Results MUC4 was shown to be highly expressed in SEF (n=13) and LGFMS (n=10), while focal positivity in synovial sarcoma (n=1). Other sarcomas, such as malignant peripheral nerve sheath tumors, fibrosarcoma, leiomyosarcoma, liposarcoma, and myxofibrosarcoma, exhibited no expression (n=0). These findings are consistent with previous research and support MUC4 specificity as a SEF and LGFMS marker. This study provides information on the diagnostic efficacy of MUC4, particularly in the context of certain subtypes. It not only helps our understanding of these unique instances, but it also provides context for histopathological and IHC findings in soft tissue sarcoma. Furthermore, this study investigates the influence of age and gender on MUC4 expression in a range of sarcomas, which was typically understudied in the literature and found no relation with expression of MUC4. Conclusion In conclusion, this study adds to our understanding of soft tissue sarcomas by emphasizing the crucial role of MUC4 in certain sarcoma subtypes while acknowledging the complex variety of the sarcoma landscape. Further research is needed to understand the molecular mechanism that governs marker expression patterns, as well as the therapeutic implications.
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  • 文章类型: Journal Article
    在早期脊椎动物发育中,组织者区域-通过分泌的形态发生素向相邻细胞发出信号并由此影响相邻细胞的细胞群-在确定的组织区域内细胞身份的建立和维持中起关键作用。中脑-后脑组织者将神经组织区域化为中脑和后脑区域,成纤维细胞生长因子8(FGF8)作为关键形态发生原。这个组织者已经在鸡肉中进行了广泛的研究,鼠标,还有斑马鱼.这里,我们证明了从人类多能干细胞(hPSC)中富集表达FGF8的细胞,使用识别“与Fgf相似表达”(SEF)和Frizzled蛋白的抗体作为附着的胚状体进行培养。这些培养物的胚状体亚群中的细胞排列以及FGF8表达群体的基因表达谱显示出与动物模型中的中脑-后脑组织者的某些相似性。在胚胎小鸡的大脑中,富集的细胞群诱导中脑结构的形成,与FGF8组织能力一致。
    In early vertebrate development, organizer regions-groups of cells that signal to and thereby influence neighboring cells by secreted morphogens-play pivotal roles in the establishment and maintenance of cell identities within defined tissue territories. The midbrain-hindbrain organizer drives regionalization of neural tissue into midbrain and hindbrain territories with fibroblast growth factor 8 (FGF8) acting as a key morphogen. This organizer has been extensively studied in chicken, mouse, and zebrafish. Here, we demonstrate the enrichment of FGF8-expressing cells from human pluripotent stem cells (hPSCs), cultured as attached embryoid bodies using antibodies that recognize \"Similar Expression to Fgf\" (SEF) and Frizzled proteins. The arrangement of cells in embryoid body subsets of these cultures and the gene expression profile of the FGF8-expressing population show certain similarities to the midbrain-hindbrain organizer in animal models. In the embryonic chick brain, the enriched cell population induces formation of midbrain structures, consistent with FGF8-organizing capability.
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  • 文章类型: Journal Article
    分子性质的准确预测在药物分子和其他功能材料的筛选和开发中至关重要。传统上,属性特定的分子描述符用于机器学习模型。反过来,这需要识别和开发目标或特定于问题的描述符。此外,从目标描述符使用的角度来看,模型预测精度的提高并不总是可行的。我们使用Shannonentropies的框架探索了准确性和可概括性问题,基于微笑,各个分子的SMARTS和/或InChiKey字符串。使用各种分子的公共数据库,我们表明,通过使用直接从SMILES评估的基于Shannon熵的描述符,可以显着提高机器学习模型预测的准确性。类似于混合物中气体的分压和总压,我们使用原子分数香农熵与来自字符串表示的相应令牌的总香农熵相结合来有效地对分子进行建模。所提出的描述符在性能上与回归模型中的标准描述符(如Morgan指纹和SHED)具有竞争力。此外,我们发现,混合描述符集包含基于香农熵的描述符或优化,使用Shannon熵的多层感知器和图神经网络的集成体系结构是协同的,以提高预测精度。这种将香农熵框架耦合到其他标准描述符和/或在集成模型中使用它的简单方法可以在提高化学和材料科学中分子性质预测的性能方面找到应用。
    Accurate prediction of molecular properties is essential in the screening and development of drug molecules and other functional materials. Traditionally, property-specific molecular descriptors are used in machine learning models. This in turn requires the identification and development of target or problem-specific descriptors. Additionally, an increase in the prediction accuracy of the model is not always feasible from the standpoint of targeted descriptor usage. We explored the accuracy and generalizability issues using a framework of Shannon entropies, based on SMILES, SMARTS and/or InChiKey strings of respective molecules. Using various public databases of molecules, we showed that the accuracy of the prediction of machine learning models could be significantly enhanced simply by using Shannon entropy-based descriptors evaluated directly from SMILES. Analogous to partial pressures and total pressure of gases in a mixture, we used atom-wise fractional Shannon entropy in combination with total Shannon entropy from respective tokens of the string representation to model the molecule efficiently. The proposed descriptor was competitive in performance with standard descriptors such as Morgan fingerprints and SHED in regression models. Additionally, we found that either a hybrid descriptor set containing the Shannon entropy-based descriptors or an optimized, ensemble architecture of multilayer perceptrons and graph neural networks using the Shannon entropies was synergistic to improve the prediction accuracy. This simple approach of coupling the Shannon entropy framework to other standard descriptors and/or using it in ensemble models could find applications in boosting the performance of molecular property predictions in chemistry and material science.
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  • 文章类型: Journal Article
    我们构建了便携式微芯片电泳重金属离子检测系统,并提出了一种pH介导的场放大样品堆叠(pH介导的FASS)在线预富集方法。pH介导的FASS通过控制电泳迁移率与溶液中分析物和背景电解质(BGE)之间的pH变化来聚焦和堆叠重金属阳离子,以提高系统的检测灵敏度。我们优化并调整了样品基质溶液(SMS)比率和pH值,以创建SMS和BGE的浓度和pH梯度。此外,我们优化了微通道宽度,以进一步提高预浓缩效果。该系统和方法分析了重金属污染的土壤渗滤液,并在90s内分离出Pb2和Cd2,分别为58.01mg/L和4.91mg/L,敏感性增强因子(SEF)分别为26.40和43.73。与电感耦合等离子体原子发射光谱法(ICP-AES)相比,该系统的检测误差小于8.80%。
    We built a portable microchip electrophoresis heavy metal ion detection system and proposed a pH-mediated field amplified sample stacking (pH-mediated FASS) online preconcentration method. The pH-mediated FASS focuses and stacks heavy metal cations by controlling electrophoretic mobilities with a pH change between the analyte and the background electrolyte (BGE) in solution to improve the detection sensitivity of the system. We optimized and adjusted sample matrix solution (SMS) ratios and pH to create concentration and pH gradients for SMS and BGE. Furthermore, we optimize the microchannel width to improve the preconcentration effect further. The system and method analyzed soil leachates polluted with heavy metals and separated Pb2+ and Cd2+ within 90 s, obtaining their levels at 58.01 mg/L and 4.91 mg/L with sensitivity enhancement factors (SEF) of 26.40 and 43.73. Compared with inductively coupled plasma atomic emission spectrometry (ICP-AES), the detection error of the system was less than 8.80%.
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  • 文章类型: Journal Article
    The present study investigated the effects of hypocapnia and hypercapnia on human somatosensory processing by utilizing somatosensory evoked magnetic fields (SEFs) with magnetoencephalography (MEG). Thirteen volunteers participated in two experiments separately to measure respiratory and cardiovascular data and SEFs. Both experiments consisted of a combination of normal and rapid respiratory rhythms and two inspiratory gas conditions (air and a hypercapnic gas); normal breathing with air (NB), rapid breathing with air (RB), normal breathing with the hypercapnic gas (NB+Gas), and rapid breathing with gas (RB+Gas). Partial pressures of end-tidal CO2 (PETCO2) increased during inhaling the hypercapnic gas and decreased during RB, but the RB+Gas condition continued to cause elevated PETCO2 compared with the baseline. Subsequently, middle cerebral artery blood (MCA) velocity using transcranial Doppler changed as well, while mean MCA velocity increased under the RB+Gas condition. The peak amplitude of the M60 component in SEFs was also significantly larger under with-gas than without-gas conditions, irrespective of the respiratory frequency. These results suggest that there is a close relationship between cerebral blood flow and neural activity of the M60 component in SEFs. This study provides evidence to further understanding on one of the neural mechanisms of hypercapnia.
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  • 文章类型: Case Reports
    UNASSIGNED:硬化性上皮样纤维肉瘤(SEF)是一种极为罕见的软组织肉瘤亚型,来自印度的数据很少。它是纤维肉瘤的一种不寻常的变体,通常出现在肢体的软组织中,头部和颈部,躯干,偶尔在内脏器官和骨骼中。这个实体通常在中年群体中报告,男人和女人一样。病理切片包括MUC4(粘蛋白4,细胞表面相关)免疫组织化学阳性,FUS-CREB3L1融合和EWSR1重排。这种疾病以其局部复发和转移扩散而闻名。对全身治疗的反应较差,复发频繁。靶向和免疫治疗的作用尚不明确。
    未经授权:在这里,我们报告一位46岁的绅士,他向我们中心的肉瘤内科肿瘤诊所就诊。他原发性受累于右耻骨并转移到肝脏,肺和弥漫性溶解性骨病变。在最终诊断SEF之前,对他的诊断进行了多次审查。通过荧光原位杂交,他对EWSR1重排的分子测试为阳性。他对姑息的阿霉素没有反应,帕唑帕尼和吉西他滨和多西他赛。
    UNASSIGNED:通过本病例报告,我们想强调这种肉瘤的罕见之处,它的经典病理特征,它与低级别纤维粘液样肉瘤密切相关,并且可用的治疗选择有限。因此,有必要对这一实体进行进一步的研究。
    UNASSIGNED: Sclerosing epithelioid fibrosarcoma (SEF) is an extremely rare subtype of soft tissue sarcoma and the data from India is sparse. It is an unusual variant of fibrosarcoma that commonly arises in the soft tissues of the limb, head and neck, trunk and occasionally in the visceral organs and bones. This entity is commonly reported in the middle age group, men and women alike. Pathological clinchers include MUC 4 (Mucin 4, cell surface associated) positivity by immunohistochemistry, FUS-CREB3L1 fusion and EWSR1 rearrangement. This disease is notoriously known for its local recurrence and metastatic spread. Response to systemic therapy is poor and relapses are frequent. The role of targeted and immunotherapy is not well defined.
    UNASSIGNED: Here we report a 46-year-old gentleman who presented to the Sarcoma Medical Oncology Clinic in our centre. He had primary involvement of right pubic bone with metastasis to liver, lung and diffuse lytic bony lesions. His diagnosis was reviewed multiple times before coming to final diagnosis of SEF. His molecular test for EWSR1 rearrangement was positive by fluorescence in-situ hybridisation. He did not respond to palliative doxorubicin, pazopanib and gemcitabine and docetaxel.
    UNASSIGNED: Through this case report, we would like to highlight the rarity of this sarcoma, its classical pathological features, its close relationship to low-grade fibromyxoid sarcoma and the limited therapeutic options available. Hence, there is a need for further research in this entity.
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  • 文章类型: Journal Article
    金纳米粒子(AuNP)是生物传感的有吸引力的结构,大多数是由于纳米尺度和生物相容性的不同性质。局域表面等离子体共振(LSPR)是这些性质之一;LSPR使电磁场增强更接近金属表面,允许表面增强光谱,像表面增强荧光(SEF)。在这项研究中,构建了一种基于金纳米棒(AuNRs)和SEF的免疫生物传感器,用于使用抗原-抗体(抗BSA/BSA)相互作用作为生物识别模型进行简单快速的分析,以检测白蛋白抗体(抗BSA)。AuNR以两种不同的配置呈现,在悬浮液中(S-AuNRs)并吸附在载玻片上(AuNRs-芯片),通过外在方法进行检测,其中监测报告分子(IR-820花青类型染料)的SEF信号。SEF作图证明了分析物检测,其中在抗BSA存在下的平均信号比在不存在分析物的情况下的测定强度高三倍。提出了一种数字方案来简化光谱数据分析并降低强度变异性;在该方案中,与不存在分析物相比,存在抗BSA的阳性事件的数量要大得多(约两倍)。基于AuNRs的SEF免疫生物传感器允许具有特定生物识别的有效和简单的分析,并且可以作为免疫生物传感的有效光谱学平台。
    Gold nanoparticles (AuNPs) are attractive structures for biosensing, most due to different properties at nanoscale and biocompatibility. Localized surface plasmon resonance (LSPR) is one of these properties; LSPR enable the electromagnetic field enhancement closer to metallic surface, which allows surface-enhanced spectroscopies, like surface enhanced fluorescence (SEF). In this study, an immuno-biosensor based on gold nanorods (AuNRs) and SEF was constructed for simple and fast analysis to detect albumin antibody (anti-BSA) using antigen-antibody (anti-BSA/BSA) interaction as the biorecognition model. AuNRs were presented in two distinct configurations, in suspension (S-AuNRs) and adsorbed on glass slides (AuNRs-chip), and the detection was performed through an extrinsic method, wherein the SEF signal of a reporter molecule (IR-820 cyanine-type dye) was monitored. The analyte detection was evidenced by SEF mapping, where the average signal in the presence of anti-BSA was three times more intense than for the assay in the absence of analyte. A digital protocol was proposed to simplify the spectroscopic data analysis and reduce the intensity variability; in this protocol the number of positive events in the presence of anti-BSA is much larger (around two times) compared to the absence of analyte. The AuNRs based SEF immuno-biosensor allowed an efficient and simple analysis with specific biorecognition and may contribute as an efficient spectroscopy platform for immuno-biosensing.
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  • 文章类型: Journal Article
    这项研究显示了一种新的SERS(表面增强拉曼散射)和SEF(表面增强荧光)平台方法,其中基底由藻酸盐聚合物(AgALG)稳定的银纳米颗粒构成,并包封在水凝胶藻酸钙珠(AgALGbead)中。在这方面,例如,涉及带电染料和藻酸盐的羧酸酯基团的静电排斥或吸引可以限定探针分子和金属纳米颗粒之间的距离以确定SERS或SEF效应。在这个意义上,选择了名为新吲哚菁绿(IR-820)的阴离子染料和阳离子染料罗丹明6G(Rh6G),以讨论藻酸盐猝灭或增强荧光和拉曼染料信号的能力。此外,对于近红外发射(S1→S0),使用IR-820染料的SEF效应可以使用532和633nm激光线以及在AgALGbead基底中在532nm处施加激发的可见区域(S2→S0)来检测。然而,阳离子染料提供表面增强共振拉曼散射(SERRS)效应和相同的AgALGbeads底物在532nm激光线下的荧光猝灭。
    This study shows a new SERS (Surface-enhanced Raman Scattering) and SEF (Surface-enhanced Fluorescence) platform approach, in which substrates were constructed from the silver nanoparticles stabilized by alginate polymer (AgALG) and encapsulated in hydrogel calcium alginate beads (AgALGbead). In this regard, the electrostatic repulsion or attraction concerning the charged dyes and the carboxylate groups of the alginate could define the distances between the probe molecules and metallic nanoparticles to determine the SERS or SEF effect. In this sense, the anionic dye named New Indocyanine Green (IR-820) and the cationic dye Rhodamine 6G (Rh6G) were selected to discuss the alginate\'s ability to quench or enhance the fluorescence and the Raman dyes signals. Furthermore, the SEF effect using the IR-820 dye can be detected for the near-infrared emission (S1 → S0) using the 532 and 633 nm laser lines as well at the visible region (S2 → S0) applying the excitation at 532 nm in the AgALGbead substrates. Nevertheless, the cationic dye provides the Surface-enhanced Resonance Raman Scattering (SERRS) effect and quenching of the fluorescence for the same AgALGbeads substrate at 532 nm laser line.
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  • 文章类型: Journal Article
    由于与未覆盖的金属纳米颗粒相比在离子和吸附物存在下改善的稳定性,金属@(电介质或半导体)核@壳混合材料的制备已经显示出对于SERS和SEF应用两者都有前景。然而,对覆盖层厚度的精细控制对于使等离子体激元增强和化学稳定性改善之间的内在折衷最大化是必要的。这里,据报道,制备的二氧化锰超薄层覆盖的金纳米棒(AuNR@MnO2)具有不同厚度的MnO2层,并对所得材料作为SERS和SEF衬底进行了表征和评价。AuNR上的MnO2层是通过在碱性介质中通过草酸钠还原高锰酸钾来制备的。通过紫外-可见光谱对AuNR@MnO2杂化材料进行了表征,透射电子显微镜,X射线粉末衍射,和循环伏安法。研究了在785nm激发的花青染料IR-820对几种厚度的MnO2超薄膜的高性能的SEF效应。对于较厚的氧化物层,增强因子增加。在633nm激发的IR-820染料的SERS效应显示出对于较薄层最显著的增强因子。两个等离子体激元效应的看似相反的行为可以分配给AuNR中产生的电磁场的距离依赖性。这导致SERS性能下降。对于SEF,较薄的层导致Au纳米粒子的发射猝灭,所以需要一个更大的距离来观察增强。
    The preparation of metal@(dielectric or semiconductor) core@shell hybrid materials have been shown promising for both SERS and SEF applications due to improved stability in the presence of ions and the adsorbate compared to non-covered metallic nanoparticles. However, fine control over the thickness of the covering layer is essential to maximize the intrinsic trade-off between the plasmonic enhancement and the chemical stability improvement. Here, the preparation of manganese dioxide ultrathin layers covered gold nanorods (AuNR@MnO2) with varying thicknesses of the MnO2 layer is reported, and the characterization and evaluation of the resulting materials as SERS and SEF substrate. The MnO2 layer over the AuNR was prepared by reducing potassium permanganate by sodium oxalate in a basic medium. The AuNR@MnO2 hybrid material was characterized by UV-Vis spectroscopy, transmission electron microscopy, X-ray powder diffraction, and cyclic voltammetry. It was studied the SEF effect of the cyanine dye IR-820 excited at 785 nm with high performance for several thicknesses of the MnO2 ultrathin film. The enhancement factor increased for thicker oxide layers. The SERS effect of the IR-820 dye excited at 633 nm showed the most significant enhancement factor for thinner layers. The seemly opposite behavior of the two plasmonic effects may be assigned to the distance dependence of the electromagnetic field generated in the AuNR, which results in decreasing SERS performance. For SEF, the thinner layers resulted in the Au nanoparticles\' emission quenching, so a more significant distance was necessary to observe enhancement.
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