19 research outputs found
Additional file 1: Figure S1. of One-Pot Method for Multifunctional Yolk Structured Nanocomposites with N-doped Carbon Shell Using Polydopamine as Precursor
The TEM images of coreāshell Au@SiO2@Pdop (a, b) and Au@void@C(c, d) in the ratio of ethanol and water(10:1). Figure S2. The SEM imagines of Au(a,b), Au@SiO2@Pdop(c,d), Au@void@C(e,f). Figure S3. ln (C/C0) versus time for the reduction of MB. Figure S4. The SEM imagines of Fe3O4@SiO2@Pdop(a,b), Fe3O4@void@C(c,d), CNTs@Fe3O4@SiO2@Pdop(e,f), CNTs@Fe3O4@void@C(g,h), Ī±-Fe2O3@SiO2@Pdop(I,j), Ī±-Fe2O3@void@C(k,l), Ag@SiO2@Pdop(m,n), Ag@void@C(o,p) at different magnetification. Figure S5 The TEM imagines of Fe3O4@SiO2@Pdop(a), Fe3O4@void@C(b), Ī±-Fe2O3@SiO2@Pdop(c), Ī±-Fe2O3@void@C(d), CNTs@Fe3O4@SiO2@Pdop(e), CNTs@Fe3O4@void@C(f), Ag@SiO2@Pdop(g), Ag@void@C(h) at higher magnetification. (DOCX 1310Ā kb
Synthesis and Characterization of Bisā<i>N</i>ā2-Aryl Triazole as a Fluorophore
Naphthalene-bridged bis-triazole
(NBT) complexes were prepared
and characterized for investigation of their photophysical properties.
Unlike our previously reported <i>N</i>-2-aryl triazoles,
which gave strong emissions through the planar intramolecular charge
transfer mechanism (coplanar conformation), this newly developed NBT
adopted a noncoplanar conformation between triazole and naphthalene,
achieving fluorescence through twisted intramolecular charge transfer
Ambient Intermolecular [2 + 2] Cycloaddition: An Example of Carbophilicity and Oxophilicity Competition in Au/Ag Catalysis
The gold-catalyzed intermolecular
[2 + 2] cycloaddition of propargyl
esters was achieved with good stereoselectivity. The āsilver-freeā
condition was critical for this transformation, while only a trace
amount of [2 + 2] products were formed in the presence of silver under
otherwise identical conditions
Uptake Pathway, Translocation, and Isomerization of Hexabromocyclododecane Diastereoisomers by Wheat in Closed Chambers
To
study the uptake pathways of 3 main hexabromocyclododecane diastereoisomers
(Ī±-, Ī²-, and Ī³-HBCDs) in wheat, four closed chambers
were designed to expose wheat to HBCDs via air and/or soil for 4 weeks.
The results showed that HBCDs could be absorbed by wheat both via
root from soil and via leaf from air. The <i>R</i><sub>t</sub> values (ratio of HBCDs from root-to-leaf translocation to the total
accumulation in leaves) ranging from 14.4 to 29.8% suggested that
acropetal translocation within wheat was limited. A negative linear
relationship was found between log <i>R</i><sub>t</sub> and
log <i>K</i><sub>ow</sub> of the HBCD diastereoisomers (<i>p</i> < 0.05). The bioconcentration factors (BCFs, (Ī¼g/g
wheat tissues)/(Ī¼g/g soil)) were in the order Ī±- >
Ī²-
> Ī³-HBCD in wheat roots and stems, being negatively related
to their <i>K</i><sub>ow</sub> values. No such correlation
was found in leaves, where the HBCDs came mainly from air distribution.
The results of enantiomeric fractions indicated that the (ā)-enantiomer
of Ī±- and Ī³-HBCDs and the (+)-Ī²-enantiomer were
selectively accumulated. Furthermore, Ī²- and Ī³-HBCDs were
transformed to Ī±-HBCD in the wheat, with 0.309ā4.80%
and 0.920ā8.40% bioisomerization efficiencies at the end of
the experiment, respectively, being the highest in leaves. Additionally,
no isomerization product from Ī±-HBCD was found
Photothermal Coupling Factor Achieving CO<sub>2</sub> Reduction Based on Palladium-Nanoparticle-Loaded TiO<sub>2</sub>
Solar fuels have
attracted great interest as an alternative use
for solar energy. However, the challenges are high temperatures and
low solar utilization for thermochemical and photochemical conversion
methods, respectively. To lower the temperature in thermochemistry
and increase solar energy utilization, a photothermochemical cycle
(PTC) has been reported for carbon dioxide (CO<sub>2</sub>) reduction
and improved by palladium-nanoparticle-loaded TiO<sub>2</sub> (PNT).
A maximum and stable carbon monoxide (CO) production of 11.05 Ī¼mol/(h
g) is demonstrated using 1.0PNT, which is 8.27Ć the CO produced
by P25 in the PTC. The PNT can enhance light utilization by a red-shifted
photoresponse range and visible light absorbance of localized surface
plasmon resonances (LSPRs). Photoinduced electron and hole pairs (EHPs)
could be more readily separated. More available charge carriers would
induce more photoinduced vacancies in the photoreaction, which serve
a key role in the PTC. Additionally, Pd can promote CO<sub>2</sub> absorbance to form Pd-CO<sub>2</sub><sup>ā</sup> and Pd-CO<sub>2</sub><sup>ā</sup>-V<sub>O</sub> on the defective surface
in the thermal reaction. Finally, CO production can be enhanced by
a photothermal coupling factor, and a reaction mechanism is proposed
for the complete cycle on the basis of both theoretical calculations
and experiments
Photothermal Coupling Factor Achieving CO<sub>2</sub> Reduction Based on Palladium-Nanoparticle-Loaded TiO<sub>2</sub>
Solar fuels have
attracted great interest as an alternative use
for solar energy. However, the challenges are high temperatures and
low solar utilization for thermochemical and photochemical conversion
methods, respectively. To lower the temperature in thermochemistry
and increase solar energy utilization, a photothermochemical cycle
(PTC) has been reported for carbon dioxide (CO<sub>2</sub>) reduction
and improved by palladium-nanoparticle-loaded TiO<sub>2</sub> (PNT).
A maximum and stable carbon monoxide (CO) production of 11.05 Ī¼mol/(h
g) is demonstrated using 1.0PNT, which is 8.27Ć the CO produced
by P25 in the PTC. The PNT can enhance light utilization by a red-shifted
photoresponse range and visible light absorbance of localized surface
plasmon resonances (LSPRs). Photoinduced electron and hole pairs (EHPs)
could be more readily separated. More available charge carriers would
induce more photoinduced vacancies in the photoreaction, which serve
a key role in the PTC. Additionally, Pd can promote CO<sub>2</sub> absorbance to form Pd-CO<sub>2</sub><sup>ā</sup> and Pd-CO<sub>2</sub><sup>ā</sup>-V<sub>O</sub> on the defective surface
in the thermal reaction. Finally, CO production can be enhanced by
a photothermal coupling factor, and a reaction mechanism is proposed
for the complete cycle on the basis of both theoretical calculations
and experiments
Pyrolysis Characteristics and Evolution of Char Structure during Pulverized Coal Pyrolysis in Drop Tube Furnace: Influence of Temperature
The
aim of the presented work was to investigate the pyrolysis
behavior of pulverized coal in a drop tube furnace (DTF), two typical
Chinese coals Shenhua bituminous and Pingzhuang lignite were used
to conduct the pyrolysis experiment in DTF under the temperature of
600ā1000 Ā°C (100 Ā°C increments). Fourier transform
infrared analysis technique was used to analyze the functional groups
in pyrolysis coal char, and pyrolysis gas was measured online by an
online flue gas analyzer. The results showed that pyrolysis in DTF
was also a dehydration upgrading process, increasing temperature caused
more volatiles released from coal. There were more H<sub>2</sub> and
CO, but less CO<sub>2</sub> and CH<sub>4</sub> in pyrolysis gas when
the temperature was rising. Compared to bituminous, lignite was more
sensitive to the changes of coal pyrolysis temperature, and more valuable
combustible gases could be obtained from lignite in DTF with less
thermal power cost. From infrared analysis results, after the pyrolysis
process in DTF, the aromatic structure in coal char increased, apparent
aromaticity and coal rank improved, unsaturated bonds in coal decreased,
and coal char structure became more stable and mature. Because of
the hydrophilic oxygen-containing groups lost after pyrolysis in DTF,
the dried coal char had a good ability for reducing moisture reabsorption
Identification of Blood Let-7e-5p as a Biomarker for Ischemic Stroke
<div><p>Circulating microRNAs (miRNAs) are emerging as novel disease biomarkers. Using a miRNA microarray, we previously showed that the whole blood level of let-7e-5p was significantly higher in ischemic stroke patients than in control subjects. However, the association between let-7e-5p expression and the occurrence of ischemic stroke remains unknown. In this study, we validated the expression levels of let-7e-5p in two case-control populations using miRNA TaqMan assays and further investigated the potential targets of let-7e-5p. The results suggest that the blood level of let-7e-5p was significantly higher in patients with ischemic stroke than in controls (p<0.05). Higher levels of let-7e-5p were associated with increased occurrence of ischemic stroke (adjusted OR, 1.89; 95% CI, 1.61~2.21, p<0.001) in the combined population. The addition of let-7e-5p to traditional risk factors led to an improvement in the area under the curve, which increased from 0.74 (95% CI, 0.70~0.78) to 0.82 (95% CI, 0.78~0.85), with a net reclassification improvement of 16.76% (p<0.0001) and an integrated discrimination improvement of 0.10 (p<0.0001) for patients with ischemic stroke. Bioinformatics prediction and cell experiments suggested that the expression levels of four genes enriched in the MAPK signaling pathway were down-regulated by let-7e-5p transfection. Specifically, the expression levels of the genes CASP3 and NLK were significantly lower in ischemic stroke patients than in controls and were negatively correlated with let-7e-5p expression. In summary, our study suggests the potential use of blood let-7e-5p as a biomarker for ischemic stroke and indicates its involvement in the related pathomechanism.</p></div
Association of the expression level of let-7e-5p with ischemic stroke.
<p>Association of the expression level of let-7e-5p with ischemic stroke.</p
AUC, NRI, and IDI calculations for let-7e-5p in the combined population.
<p>AUC, NRI, and IDI calculations for let-7e-5p in the combined population.</p