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7068 research data, page 1 of 707

Optical forces on metallic nanoparticles induced by a photonic nanojet

Xudong Cui; Daniel Erni; Christian Hafner (2008)
Publisher: Figshare
We investigate the optical forces acting on a metallic nanoparticle when the nanoparticle is introduced within a photonic nanojet (PNJ). Optical forces at resonance and off-resonance conditions of the microcylinder or nanoparticle are investigated. Under proper polarization conditions, the whispering gallery mode can be excited in the microcylinder, even at off resonance provided that scattering from the nanoparticle is strong enough. The optical forces are enhanced at resonance either of the...

Transition from thermal diffusion to heat accumulation in high repetition rate femtosecond laser writing of buried optical waveguides

A variable (0.2 to 5 MHz) repetition rate femtosecond laser was applied to delineate the role of thermal diffusion and heat accumulation effects in forming low-loss optical waveguides in borosilicate glass across a broad range of laser exposure conditions. For the first time, a smooth transition from diffusion-only transport at 200-kHz repetition rate to strong heat accumulation effects at 0.5 to 2 MHz was observed and shown to drive significant variations in waveguide morphology, with rapidl...

Average nucleotide variant counts (N scores) of 17 conserved sites compared to the mean of 20 random sites in all potyvirus genomes from 1985 to 2005.

Average nucleotide variant counts (N scores) of 17 conserved sites compared to the mean of 20 random sites in all potyvirus genomes from 1985 to 2005.

Candidate Pigmentation Genes.

Our siRNA-based screening approach identified 98 siRNAs that significantly inhibited pigment production. 4 of these 98 genes did not retest, while two of the 98 genes were removed from the Refseq database. Gene Ontology databases were used to segregate the 92 remaining genes into function classes and identify conserved domains within the corresponding proteins. Gene ontology databases, OMIM, and Pubmed searching was utilized to identify associations between our genes and human diseases. Genes...

Impact table to show the predicting power of specific hypoxia-related genes on CMS (CMS-score≥12) in our Andean subjects in Lima, Peru, altitude 150 m.

To assess the impact of specific genes on chronic mountain sickness-score (CMS-sc), using a sliding scale (continuous), we constructed an “impact table” for the combined (CMS & Controls) Cerro de Pasco groups while normoxic in Lima (sea level) (B).In univariate linear regression model, PDP2 is found to be the most significant predictor of CMS-sc (highlighted) even in normoxia. Adjusting for PDP2 eliminates the impact of the other genes on the CMS-sc (columns, ADJ for PDP2). However, adjusting...

Estimates of Mutation Clusters per Genome of Lac+ Stress-Induced Mutantsa.

aIn all of the studies cited, the frequency of one or more classes of chromosomal unselected secondary mutations were ascertained among Lac+ stress-induced mutants, the number of base-pairs that could be mutated to produce the mutant phenotype assayed was estimated (Text S1), and the number of mutations expected per all of the basepairs in the genome was then extrapolated. These estimates are based on the assumption that all Lac+ stress-induced mutants had an equal probability of accumulating...

Factors Associated with Histologic Chorioamnionitis, Funisitis, and Neonatal Morbidity and Mortality.

Results are reported as odds ratios (95% confidence interval).The table includes variables that exhibited a statistically significant association with one or more of the three measured outcomes. For each outcome, the multivariate model was comprised of those variables exhibiting a significant association in the univariate model. Other variables that were subject to univariate analysis but did not exhibit a significant association with any of these outcomes were: African-American race, nullipa...

Divergent Evolution of CHD3 Proteins Resulted in MOM1 Refining Epigenetic Control in Vascular Plants

Arabidopsis MOM1 is required for the heritable maintenance of transcriptional gene silencing (TGS). Unlike many other silencing factors, depletion of MOM1 evokes transcription at selected loci without major changes in DNA methylation or histone modification. These loci retain unusual, bivalent chromatin properties, intermediate to both euchromatin and heterochromatin. The structure of MOM1 previously suggested an integral nuclear membrane protein with chromatin-remodeling and actin-binding ac...

Emergence of Azole Resistance in Aspergillus fumigatus and Spread of a Single Resistance Mechanism

BackgroundResistance to triazoles was recently reported in Aspergillus fumigatus isolates cultured from patients with invasive aspergillosis. The prevalence of azole resistance in A. fumigatus is unknown. We investigated the prevalence and spread of azole resistance using our culture collection that contained A. fumigatus isolates collected between 1994 and 2007. Methods and FindingsWe investigated the prevalence of itraconazole (ITZ) resistance in 1,912 clinical A. fumigatus isolates collect...