8 research outputs found
Surface Structure, Adsorption, and Thermal Desorption Behaviors of Methaneselenolate Monolayers on Au(111) from Dimethyl Diselenides
To understand the effect of headgroups
(i.e., sulfur and selenium)
on surface structure, adsorption states, and thermal desorption behaviors
of self-assembled monolayers (SAMs) on Au(111), we examined methanethiolate
(CH<sub>3</sub>–S, MS) and metheneselenolate (CH<sub>3</sub>–Se, MSe) monolayers formed from dimethyl disulfide (DMDS)
and dimethyl diselenide (DMDSe) molecules by ambient vapor-phase deposition.
Scanning tunneling microscopy imaging revealed that DMDS molecules
on Au(111) after a 1 h deposition form MS monolayers containing a
disordered phase and an ordered row phase with an inter-row spacing
of 1.51 nm, whereas DMDSe molecules form long-range-ordered MSe monolayers
with a (√3 × 3√3)<i>R</i>30° structure.
X-ray photoelectron spectroscopy measurements showed that MS or MSe
monolayers chemisorbed on Au(111) were formed via S–S bond
cleavage of DMDS or Se–Se bond cleavage of DMDSe. On the other
hand, we monitored three main desorption fragments for MS and MSe
monolayers using TDS monomers (CH<sub>3</sub>S<sup>+</sup>, CH<sub>3</sub>Se<sup>+</sup>), parent mass species (CH<sub>3</sub>SH<sup>+</sup>, CH<sub>3</sub>SeH<sup>+</sup>), and dimers (CH<sub>3</sub>S–SCH<sub>3</sub><sup>+</sup>, CH<sub>3</sub>Se–SeCH<sub>3</sub><sup>+</sup>). Interestingly, we found that thermal desorption
behaviors of MSe monolayers were markedly different from those of
MS monolayers. All desorption peaks for MSe monolayers were observed
at a higher temperature compared with MS monolayers, suggesting that
the adsorption affinity of selenium atoms for the Au(111) surface
is stronger than that of sulfur atoms. In addition, the desorption
intensity of dimer fragments for MSe monolayers was much lower than
for MS monolayers, indicating that selenolate SAMs on Au(111) did
not undergo their dimerization efficiently during thermal heating
compared with thiolate SAMs. Our results provide new insight into
understanding the surface structure and thermal desorption behavior
of MSe monolayers on Au(111) surface by comparing those of MS monolayers
Reconstructed 3-D RI distributions of RBCs.
<p>(a–d) Cross-sectional images of 3-D RI tomograms of RBCs (along the <i>x</i>–<i>y</i>, the <i>x</i>–<i>z</i>, and the <i>z</i>–<i>y</i> planes) exposed to diluted blood solutions of (a) 0.0, (b) 0.1, (c) 0.3, and (d) 0.5% ethanol concentrations; (e–h) 3-D rendered RI isosurfaces (<i>n</i> > 1.355) of the four representative RBCs in (a–d).</p
Morphological parameters for RBCs exposed to 0.0, 0.1, 0.3, and 0.5% ethanol concentrations
<p>(a) Volume, (b) Surface area, and (c) Sphericity. Each circle indicates individual RBC measurements. Each circle indicates measurements of an individual RBCl measurements. The mean value of each morphological RBC parameters is denoted as the horizontal line with the vertical bar for the standard deviation.</p
List of mobile element regions in the genome of <i>Lactiplantibacillus plantarum</i> PMO 08 predicted by mobile genetic finder.
List of mobile element regions in the genome of Lactiplantibacillus plantarum PMO 08 predicted by mobile genetic finder.</p
List of prophage regions in the genome of <i>Lactiplantibacillus plantarum</i> PMO 08 predicted by PHASTER.
List of prophage regions in the genome of Lactiplantibacillus plantarum PMO 08 predicted by PHASTER.</p
List of antimicrobial resistance genes analyzed by BlastKoala and their locations in the genome of <i>Lactiplantibacillus plantarum</i> PMO 08.
List of antimicrobial resistance genes analyzed by BlastKoala and their locations in the genome of Lactiplantibacillus plantarum PMO 08.</p
List of virulence and undesirable genes detected in the genome of <i>Lactiplantibacillus plantarum</i> PMO 08.
List of virulence and undesirable genes detected in the genome of Lactiplantibacillus plantarum PMO 08.</p
Genes related with probiotic characteristics in genome of <i>Lactiplantibacillus plantarum</i> PMO 08.
Genes related with probiotic characteristics in genome of Lactiplantibacillus plantarum PMO 08.</p