排序方式: 共有38条查询结果,搜索用时 15 毫秒
1.
Andronescu Mirela Dees Danielle Slaybaugh Laura Zhao Yinglei Condon Anne Cohen Barry Skiena Steven 《Natural computing》2003,2(4):391-415
We present an efficient algorithm for determining whether all moleculesin a combinatorial set of DNA or RNA strandsare structure free, and thus availablefor bonding to their Watson-Crick
complements.This work is motivated by the goalof testing whether strands used in DNAcomputations or as molecular bar-codesare
structure free, where the strands areconcatenations of short words. We alsopresent an algorithm for determining whetherall
words in S*, for some finite setS of equi-length words, are structure free.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
2.
3.
4.
Ecaterina Andronescu Maria Ficai Georgeta Voicu Denisa Ficai Maria Maganu Anton Ficai 《Journal of materials science. Materials in medicine》2010,21(7):2237-2242
Our purpose was obtaining and characterizing a complex composite system with multifunctional role: bone graft material and
hyperthermia generator necessary for bone cancer therapy. The designed system was a magnetite enriched collagen/hydroxyapatite
composite material, obtained by a co-precipitation method. Due to the applied electromagnetic field the magnetite will induce
hyperthermia and cause tumoral cell apoptosis. The complex bone graft system was characterised by XRD, FTIR and SEM, while
the hyperthermia was quantify by measuring the temperature increase due to the applied alternative electromagnetical field. 相似文献
5.
6.
Waag Friedrich Fares Wessam I. M. A. Li Yao Andronescu Corina Gökce Bilal Barcikowski Stephan 《Journal of Materials Science》2022,57(4):3041-3056
Journal of Materials Science - Alloy nanoparticles offer the possibility to tune functional properties of nanoscale structures. Prominent examples of tuned properties are the local surface... 相似文献
7.
A. A. Iliadis S. N. Andronescu W. Yang R. D. Vispute A. Stanishevsky J. H. Orloff R. P. Sharma T. Venkatesan M. C. Wood K. A. Jones 《Journal of Electronic Materials》1999,28(3):136-140
Low resistance Pt and W ohmic metallizations to p-type 6H-SiC, using focused ion beam (FIB) surface-modification and in-situ
direct-write metal deposition without annealing, are reported. FIB (Ga) surface-modification and in-situ deposition of Pt,
and W showed minimum contact resistance values of 2.8 × 10−4 ohm-cm2 to 2.5 × 10−4 ohm-cm2, respectively. A comparison with ex-situ pulse laser deposited Pt on surface-modified areas showed comparable contact resistance
values and similar behavior. Auger and secondary ion mass spectroscopy analysis showed a significant (∼4% a.c.) incorporation
of Ga within a 15 nm distance from the SiC surface with surface-modification. Atomic force micros-copy studies showed that
surface-modification process smooths out the SiC surface significantly. 相似文献
8.
Emmanuel Batsa Tetteh Tobias Loffler Tsvetan Tarnev Thomas Quast Patrick Wilde Harshitha Barike Aiyappa Simon Schumacher Corina Andronescu Richard D.Tilley Xingxing Chen Wolfgang Schuhmann 《Nano Research》2022,(2):1564-1569
Scanning electrochemical cell microscopy(SECCM)is increasingly applied to determine the intrinsic catalytic activity of single electrocatalyst particle.This is especially feasible if the catalyst nanoparticles are large enough that they can be found and counted in post-SECCM scanning electron microscopy images.Evidently,this becomes impossible for very small nanoparticles and hence,a catalytic current measured in one landing zone of the SECCM droplet cannot be correlated to the exact number of catalyst particles.We show,that by introducing a ruler method employing a carbon nanoelectrode decorated with a countable number of the same catalyst particles from which the catalytic activity can be determined,the activity determined using SECCM from many spots can be converted in the intrinsic catalytic activity of a certain number of catalyst nanoparticles. 相似文献
9.
Liliana Marinescu Denisa Ficai Anton Ficai Ovidiu Oprea Adrian Ionut Nicoara Bogdan Stefan Vasile Laura Boanta Alexandru Marin Ecaterina Andronescu Alina-Maria Holban 《International journal of molecular sciences》2022,23(11)
The synthesis of nanoparticles from noble metals has received high attention from researchers due to their unique properties and their wide range of applications. Silver nanoparticles (AgNPs), in particular, show a remarkable inhibitory effect against microorganisms and viruses. Various methods have been developed to obtain AgNPs, however the stability of such nanostructures over time is still challenging. Researchers attempt to obtain particular shapes and sizes in order to tailor AgNPs properties for specific areas, such as biochemistry, biology, agriculture, electronics, medicine, and industry. The aim of this study was to design AgNPs with improved antimicrobial characteristics and stability. Two different wet chemical routes were considered: synthesis being performed (i) reduction method at room temperatures and (ii) solvothermal method at high temperature. Here, we show that the antimicrobial properties of the obtained AgNPs, are influenced by their synthesis route, which impact on the size and shape of the structures. This work analyses and compares the antimicrobial properties of the obtained AgNPs, based on their structure, sizes and morphologies which are influenced, in turn, not only by the type or quantities of precursors used but also by the temperature of the reaction. Generally, AgNPs obtained by solvothermal, at raised temperature, registered better antimicrobial activity as compared to NPs obtained by reduction method at room temperature. 相似文献
10.