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81.
Effects of Cerium on Rooting and Physiological-Biochemical Metabolism of Tissue Culture Plantlet from Dioscorea Zingberensis 相似文献
82.
Polyol-Mediated Synthesis and Photoluminescent Properties of LaPO_4∶Eu ~( 3+) Nanoparticles 总被引:1,自引:0,他引:1
Polyol-Mediated Synthesis and Photoluminescent Properties of LaPO_4∶Eu ~( 3+) Nanoparticles 相似文献
83.
Wang Peng* ** Jin Depeng* Zeng Lieguang* * 《电子科学学刊(英文版)》2006,23(6):948-951
I. Introduction Motivated by adopting both telecom and data-com traffic into Synchronous Digital Hierarchy (SDH)[1] transport payloads, we develop the mono-lithic Multi-Service Transport Platform (MSTP)[2] Application Specified Integrated Circuit (ASIC) MSEOSX8-6, which is a highly integrated device capable of mapping 10/100/1000Mbit/s Ethernet[3], 155Mbit/s Resilient Packet Ring (RPR)[4], as well as 2.048Mbit/s E1 traffic into SDH STM-1 payloads. On the line side, the chip s… 相似文献
84.
Sn-Sb peritectic alloy was treated with 400 W, 600 W and 800 W ultrasonic, respectively, to study the effect of power ultrasonic on solidification microstructure. Results show that power ultrasonic can refine α phase and β phase of the alloy, as well as eliminate gravitational segregation. Moreover, 600 W ultrasonic demonstrated the best refining effect, not only homogenous and fine solidification microstructure can be obtained, the cubical β phase crystals can also be spheroidized. 相似文献
85.
SHEN Yanxia ZHANG Yongxue* LAN Xiaoli CAO Wei 《核技术(英文版)》2007,18(2):101-106
To explore the preparation method of liposome-coated 99mTc-labeled antisense oligonucleotide (ASON),targeteing the proliferating cell nuclear antigen (PCNA), and to explore the biological characteristics and the uptake kinetics of a radiolabeled probe in vascular smooth muscle cells, an 18-base single-stranded antisense oligonucleotide targeting PCNA mRNA and the complementary strand (sense oligonucleotide, SON) were synthesized. The ASON (SON) was labeled with 99mTc, by conjugating the bifunctional chelator (hydrazino nicotinamide, HYNIC), and purified through a gel filtration column of Sephadex G-25. The product was then encapsulated in cationic liposome (oligofectamineTM). The radiolabeling efficiency, radiochemical purity, stability of the liposome-coated 99mTc-HYNIC-ASON in a phosphate buffered solution (PBS), and fresh human serum and its uptake rate were studied. There was no significant difference between the 99mTc radiolabeling efficiencies of HYNIC-ASON and HYNIC-SON, which were 60.04% ± 1.92% and 59.60% ± 2.53%, respectively (P > 0.05, n = 5). The radiochemical purity of the liposome-coated 99mTc-HYNIC-ASON was 94.70% ± 1.90% (n = 5). And after incubation with PBS and fresh human seAt 90 min after transfection, the uptake rate of the liposome-coated 99mTc-HYNIC-ASON reached its peak of 83.8% ±5.92% in vascular smooth muscle cells (VSMCs) and was much higher than that of the nonliposome-coated 99mTc-HYNIC-ASON, which was 11.16% ± 0.54% (P < 0.01, n = 4). The labeling method of PCNA ASON (SON) conjugated by HYNIC has been proved successful. The liposome was able to enhance the ASON (SON) uptake in VSMCs,and could be widely used as a safe, convenient, effective gene transfer carrier. 相似文献
86.
一种基于折叠计数器重新播种的确定自测试方案 总被引:35,自引:3,他引:32
提出了一种基于扫描自测试的确定与混合模式新方案,这种方案依赖于一个新型的模式生成器,它主要配备一个可编程的约翰逊计数器,称之为折叠计数器。这种新技术首先使用一个小的线性反馈移位寄存器(LFSR),生成伪随机测试模式测试容易测试的故障,并且获得一个硬故障测试立方集T;其次采用经典的输入精简技术,集合T的测试立方宽度可以被压缩;最终为了能够找出合理的小数目折叠计数器种子,来生成这个确定的测试立方集T,给出了其理论背景和实用算法。试验结果表明,这个所建议的方案与先前所公布的基于线性反馈移位寄存器和约翰逊计数器的重新播种方法相比,具有非常出色的结果。因此它提供了一种有效的、弹性的基于扫描的自测试解。 相似文献
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90.
采用美拉德反应提高黄鲫蛋白抗菌肽的抑菌活性 总被引:2,自引:0,他引:2
以黄鲫蛋白抗菌肽(HAHp)为底物,通过美拉德反应提高其抑菌活性.以大肠杆菌为指示菌,在100℃水浴加热条件下,比较 HAHp-葡萄糖、HAHp-蔗糖、HAHp-麦芽糖和 HAHp-乳糖的美拉德反应物抑菌活性;选用葡萄糖为添加糖,测定 HAHp-葡萄糖美拉德反应初始 pH 值、加糖量、加热温度和加热时间对美拉德反应物的抑菌活性影响.结果表明:提高反应初始 pH 值(大于 pH6.0)会降低 HAHp 美拉德产物的抑菌活性,选择葡萄糖适宜加入量,控制加热温度和时间可以提高 HAHp-葡萄糖美拉德反应物对大肠杆菌的抑菌活性 相似文献