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991.
992.
采用几种具有不同电导率的PEDOT(poly(3,4-ethylene dioxythiophene)),研究其对器件性能的影响,结果表明高电导率的PEDOT与ITO(Indium tin oxide)一起作为光电池的阳极,有利于光电池能量转换效率的提高.探讨了高电导率PEDOT的厚度与器件性能之间的相关性,表明在保证器件不漏电的前提下PEDOT的厚度越薄越好. 相似文献
993.
994.
采用化学连续浸提法对南方某市农田土壤中铜的赋存形态进行了比较分析,并且计算了铜的有效性系数。结果表明,该地区土壤没有受到重金属铜污染,土壤可交换态铜、碳酸盐结合态铜、铁锰氧化态铜、有机态铜和残余态铜分别占全铜量的0.8%、29.2%、40.2%、8.4%和21.4%。供试土壤有效铜含量与土壤铁锰氧化态铜、有机态铜含量呈极显著性正相关。 相似文献
995.
研究了一种新颖的微流管道血细胞计数器的结构及其工作原理,采用流体动力学对其液体分层流动特性进行了仿真分析,结合图形制备和低温直接键合工艺制作了硅基微流体管道血细胞计数器结构,并采用红外透射方法对微流体管道结构进行了检测.对封闭管道的流通性及结构的键合强度也进行了测量.研究分析表明,采用上述工艺制备的微流体芯片结构与电子器件兼容性好,具有良好的化学惰性和热稳定性,而且管道结构规则,精度高,键合界面层薄,具有较好的应用前景. 相似文献
996.
997.
Jiang Ouyang Ling Zhang Leijiao Li Wei Chen Zhongmin Tang Xiaoyuan Ji Chan Feng Na Tao Na Kong Tianfeng Chen You-Nian Liu Wei Tao 《纳微快报(英文)》2021,(6):108-125
Stanene(Sn)-based materials have been extensively applied in industrial production and daily life,but their potential biomedi-cal application remains largely un... 相似文献
998.
Hui Wang Ruipeng Chen Fan Zhang Zhixue Yu Yue Wang Zhonglin Tang Liang Yang Xiangfang Tang Benhai Xiong 《International journal of molecular sciences》2022,23(14)
Hypocalcemia is caused by a sharp decline in blood calcium concentration after dairy cow calving, which can lead to various diseases or even death. It is necessary to develop an inexpensive, easy-to-operate, reliable sensor to diagnose hypocalcemia. The cellulose-paper-based microfluidic field-effect biosensor is promising for point-of-care, but it has poor mechanical strength and a short service life after exposure to an aqueous solution. Octadecyltrichlorosilane (OTS), as a popular organosilane derivative, can improve the hydrophobicity of cellulose paper to overcome the shortage of cellulose paper. In this work, OTS was used to produce the superhydrophobic cellulose paper that enhances the mechanical strength and short service life of MFB, and a microfluidic field-effect biosensor (MFB) with semiconducting single-walled carbon nanotubes (SWNTs) and DNAzyme was then developed for the Ca2+ determination. Pyrene carboxylic acid (PCA) attached to SWNTs through a non-covalent π-π stacking interaction provided a carboxyl group that can bond with an amino group of DNAzyme. Two DNAzymes with different sensitivities were designed by changing the sequence length and cleavage site, which were functionalized with SPFET/SWNTs-PCA to form Dual-MFB, decreasing the interference of impurities in cow blood. After optimizing the detecting parameters, Dual-MFB could determine the Ca2+ concentration in the range of 25 μM to 5 mM, with a detection limit of 10.7 μM. The proposed Dual-MFB was applied to measure Ca2+ concentration in cow blood, which provided a new method to diagnose hypocalcemia after dairy cow calving. 相似文献
999.
Hui Min Tan He Cheng Yew Chung Tang Sai Mun Leong Poh Yin Teo Chi Kuen Lee Victor Kwan Min Lee Susan Swee-Shan Hue 《International journal of molecular sciences》2022,23(14)
Adipocytic tumors are the most common subtype of soft tissue tumors. In current clinical practice, distinguishing benign lipomas from well-differentiated liposarcomas (WDLPS), as well as dedifferentiated liposarcomas (DDLPS) from their morphologic mimics, remains a significant diagnostic challenge. This is especially so when examining small biopsy samples and without the aid of additional ancillary tests. Recognizing the important role that microRNAs (miRNAs) play in tumorigenesis and their potential utility in tumor classification, we analyzed routine clinical tissue samples of benign and malignant lipomatous tumors, as well as other sarcoma mimics, to identify distinguishing miRNA-based signatures that can aid in the differential diagnosis of these entities. We discovered a 6-miRNA signature that separated lipomas from WDLPS with high confidence (AUC of 0.963), as well as a separate 6-miRNA signature that distinguished DDLPS from their more aggressive histologic mimics (AUC of 0.740). Functional enrichment analysis unveiled possible mechanistic involvement of these predictive miRNAs in adipocytic cancer-related biological processes and pathways such as PI3K/AKT/mTOR and MAPK signaling, further supporting the relevance of these miRNAs as biomarkers for adipocytic tumors. Our results demonstrate that miRNA expression profiling may potentially be used as an adjunctive tool for the diagnosis of benign and malignant adipocytic tumors. Further validation studies are warranted. 相似文献
1000.
The spatiotemporal evolution of hairpin vortex structures in a fully developed turbulent boundary layer is investigated qualitatively and quantitatively by usin... 相似文献