113 research outputs found
Data for: A novel multiwalled LiF@GO@SiO2 microcapsule with high phase change temperature
Data for: A novel multiwalled LiF@GO@SiO2 microcapsule with high phase change temperatur
Estimating Preferred Alkane Carbon Numbers of Nonionic Surfactants in Normalized Hydrophilic–Lipophilic Deviation Theory from Dissipative Particle Dynamics Modeling
The
preferred alkane carbon number (PACN) in the normalized hydrophilic–lipophilic
deviation (HLDN) theory is a numerical parameter and a
transferable scale to characterize the amphiphilicity of surfactants,
which is usually measured experimentally using the fish diagram or
phase inversion temperature (PIT) methods, and the experimental measurement
can only be applied to existing surfactants. Here, for the first time,
we propose a procedure to estimate the PACN of CiEj nonionic surfactants directly
from dissipative particle dynamics (DPD) simulation. The procedure
leverages the method of moment concept to quantitatively evaluate
the bending tendency of nonionic surfactant monolayers by calculating
the torque density. Seven nonionic surfactants, CiEj (C6E2,
C6E3, C8E3, C8E4, C10E4, C12E4, and C12E5), with known PACNs are modeled.
Two surfactants, C10E4 and C6E2, were first selected to train and test the interaction parameters,
and the relationship between interaction parameters and torque density
was mapped for the C10E4–octane–water
system using the artificial neural network (ANN) fitting approach
to derive the interaction parameters giving zero torque density, then
the interaction parameters were tested in the C6E2–dodecane–water system to get the final tuned interaction
parameters for PACN estimation. With this procedure, we reproduce
the PACN values and their trend of seven nonionic surfactants with
reasonable accuracy, which opens the door for quantitative comparison
of surfactant amphiphilicity and surfactant classification in silico
using the PACN as a transferrable scale
Revealing Surface/Interface Chemistry of the Ordered Aramid Nanofiber/MXene Structure for Infrared Thermal Camouflage and Electromagnetic Interference Shielding
The
past decade has witnessed the advances of infrared (IR) thermal
camouflage materials, but challenges remain in breaking the trade-off
nature between emissivity and mechanical properties. In response,
we identify the key role of a moderate reprotonation rate in the aramid
nanofiber (ANF)/MXene film toward a surface-to-bulk alignment. Theoretical
simulation demonstrates that the ordered ANF/MXene surface eliminates
the local high electric field by field confinement and localization,
responsible for the low IR emissivity. By scrutinizing the surface/interface
chemistry, the processing optimization is achieved to develop an ordered
and densely stacked ANF/MXene film, which features a low emissivity
of 16%, accounting for sound IR thermal camouflage performances including
a wide camouflage temperature range of 50–200 °C, a large
reduction in radiation temperature from 200.5 to 63.6 °C, and
long-term stability. This design also enables good mechanical performance
such as a tensile strength of 190.8 MPa, a toughness of 12.1 MJ m–3, and a modulus of 7.9 GPa, responsible for better
thermal camouflage applications. The tailor-made ANF/MXene film further
attains an electromagnetic interference (EMI) shielding effectiveness
(40.4 dB) in the X-band, manifesting its promise for IR stealth compatible
EMI shielding applications. This work will shed light on the dynamic
topology reconstruction of camouflage materials for boosting thermal
management technology
Image_7_Novel Immune-Related Gene Signature for Risk Stratification and Prognosis of Survival in Lower-Grade Glioma.PDF
ObjectiveDespite several clinicopathological factors being integrated as prognostic biomarkers, the individual variants and risk stratification have not been fully elucidated in lower grade glioma (LGG). With the prevalence of gene expression profiling in LGG, and based on the critical role of the immune microenvironment, the aim of our study was to develop an immune-related signature for risk stratification and prognosis prediction in LGG.MethodsRNA-sequencing data from The Cancer Genome Atlas (TCGA), Genome Tissue Expression (GTEx), and Chinese Glioma Genome Atlas (CGGA) were used. Immune-related genes were obtained from the Immunology Database and Analysis Portal (ImmPort). Univariate, multivariate cox regression, and Lasso regression were employed to identify differentially expressed immune-related genes (DEGs) and establish the signature. A nomogram was constructed, and its performance was evaluated by Harrell’s concordance index (C-index), receiver operating characteristic (ROC), and calibration curves. Relationships between the risk score and tumor-infiltrating immune cell abundances were evaluated using CIBERSORTx and TIMER.ResultsNoted, 277 immune-related DEGs were identified. Consecutively, 6 immune genes (CANX, HSPA1B, KLRC2, PSMC6, RFXAP, and TAP1) were identified as risk signature and Kaplan–Meier curve, ROC curve, and risk plot verified its performance in TCGA and CGGA datasets. Univariate and multivariate Cox regression indicated that the risk group was an independent predictor in primary LGG. The prognostic signature showed fair accuracy for 3- and 5-year overall survival in both internal (TCGA) and external (CGGA) validation cohorts. However, predictive performance was poor in the recurrent LGG cohort. The CIBERSORTx algorithm revealed that naïve CD4+ T cells were significant higher in low-risk group. Conversely, the infiltration levels of M1-type macrophages, M2-type macrophages, and CD8+T cells were significant higher in high-risk group in both TCGA and CGGA cohorts.ConclusionThe present study constructed a robust six immune-related gene signature and established a prognostic nomogram effective in risk stratification and prediction of overall survival in primary LGG.</p
Image_1_Novel Immune-Related Gene Signature for Risk Stratification and Prognosis of Survival in Lower-Grade Glioma.PDF
ObjectiveDespite several clinicopathological factors being integrated as prognostic biomarkers, the individual variants and risk stratification have not been fully elucidated in lower grade glioma (LGG). With the prevalence of gene expression profiling in LGG, and based on the critical role of the immune microenvironment, the aim of our study was to develop an immune-related signature for risk stratification and prognosis prediction in LGG.MethodsRNA-sequencing data from The Cancer Genome Atlas (TCGA), Genome Tissue Expression (GTEx), and Chinese Glioma Genome Atlas (CGGA) were used. Immune-related genes were obtained from the Immunology Database and Analysis Portal (ImmPort). Univariate, multivariate cox regression, and Lasso regression were employed to identify differentially expressed immune-related genes (DEGs) and establish the signature. A nomogram was constructed, and its performance was evaluated by Harrell’s concordance index (C-index), receiver operating characteristic (ROC), and calibration curves. Relationships between the risk score and tumor-infiltrating immune cell abundances were evaluated using CIBERSORTx and TIMER.ResultsNoted, 277 immune-related DEGs were identified. Consecutively, 6 immune genes (CANX, HSPA1B, KLRC2, PSMC6, RFXAP, and TAP1) were identified as risk signature and Kaplan–Meier curve, ROC curve, and risk plot verified its performance in TCGA and CGGA datasets. Univariate and multivariate Cox regression indicated that the risk group was an independent predictor in primary LGG. The prognostic signature showed fair accuracy for 3- and 5-year overall survival in both internal (TCGA) and external (CGGA) validation cohorts. However, predictive performance was poor in the recurrent LGG cohort. The CIBERSORTx algorithm revealed that naïve CD4+ T cells were significant higher in low-risk group. Conversely, the infiltration levels of M1-type macrophages, M2-type macrophages, and CD8+T cells were significant higher in high-risk group in both TCGA and CGGA cohorts.ConclusionThe present study constructed a robust six immune-related gene signature and established a prognostic nomogram effective in risk stratification and prediction of overall survival in primary LGG.</p
Preparation of nanometer-sized poly(methacrylic acid) particles in water-in-oil microemulsions
A water-in-oil microemulsion, water-in-cyclohexane
stabilized by poly(ethylene glycol) tert-octylphenyl,
was developed to prepare poly(methacrylic acid)
(PMAA) particles. Up to 100% conversion of the amphiphilic
monomer, methacrylic acid (MAA), which could not be
converted to the polymer efficiently in a dioctylsulfosuccinate
sodium salt/toluene microemulsion, was achieved. The
viscosity-average molecular weight of the PMAA prepared
was 1.45 105 g/mol. The effects of some polymerization
parameters, including the reaction temperature and the concentrations
of the initiator and the monomer, on the polymerization
of MAA were investigated. The results showed
that the polymerization rate of MAA was slower than that of
acrylamide in the microemulsions reported in the literature.
The degree of conversion increased with the initiator concentration,
reaction temperature, and monomer concentration.
However, the stable microemulsions became turbid
during the polymerization when the reaction temperature
was at 70°C or at a high monomer concentration (40 wt %)
The synthesized PMAA particles were spherical and had
diameters in the range of 50 nm
Image_9_Novel Immune-Related Gene Signature for Risk Stratification and Prognosis of Survival in Lower-Grade Glioma.PDF
ObjectiveDespite several clinicopathological factors being integrated as prognostic biomarkers, the individual variants and risk stratification have not been fully elucidated in lower grade glioma (LGG). With the prevalence of gene expression profiling in LGG, and based on the critical role of the immune microenvironment, the aim of our study was to develop an immune-related signature for risk stratification and prognosis prediction in LGG.MethodsRNA-sequencing data from The Cancer Genome Atlas (TCGA), Genome Tissue Expression (GTEx), and Chinese Glioma Genome Atlas (CGGA) were used. Immune-related genes were obtained from the Immunology Database and Analysis Portal (ImmPort). Univariate, multivariate cox regression, and Lasso regression were employed to identify differentially expressed immune-related genes (DEGs) and establish the signature. A nomogram was constructed, and its performance was evaluated by Harrell’s concordance index (C-index), receiver operating characteristic (ROC), and calibration curves. Relationships between the risk score and tumor-infiltrating immune cell abundances were evaluated using CIBERSORTx and TIMER.ResultsNoted, 277 immune-related DEGs were identified. Consecutively, 6 immune genes (CANX, HSPA1B, KLRC2, PSMC6, RFXAP, and TAP1) were identified as risk signature and Kaplan–Meier curve, ROC curve, and risk plot verified its performance in TCGA and CGGA datasets. Univariate and multivariate Cox regression indicated that the risk group was an independent predictor in primary LGG. The prognostic signature showed fair accuracy for 3- and 5-year overall survival in both internal (TCGA) and external (CGGA) validation cohorts. However, predictive performance was poor in the recurrent LGG cohort. The CIBERSORTx algorithm revealed that naïve CD4+ T cells were significant higher in low-risk group. Conversely, the infiltration levels of M1-type macrophages, M2-type macrophages, and CD8+T cells were significant higher in high-risk group in both TCGA and CGGA cohorts.ConclusionThe present study constructed a robust six immune-related gene signature and established a prognostic nomogram effective in risk stratification and prediction of overall survival in primary LGG.</p
Image_3_Novel Immune-Related Gene Signature for Risk Stratification and Prognosis of Survival in Lower-Grade Glioma.PDF
ObjectiveDespite several clinicopathological factors being integrated as prognostic biomarkers, the individual variants and risk stratification have not been fully elucidated in lower grade glioma (LGG). With the prevalence of gene expression profiling in LGG, and based on the critical role of the immune microenvironment, the aim of our study was to develop an immune-related signature for risk stratification and prognosis prediction in LGG.MethodsRNA-sequencing data from The Cancer Genome Atlas (TCGA), Genome Tissue Expression (GTEx), and Chinese Glioma Genome Atlas (CGGA) were used. Immune-related genes were obtained from the Immunology Database and Analysis Portal (ImmPort). Univariate, multivariate cox regression, and Lasso regression were employed to identify differentially expressed immune-related genes (DEGs) and establish the signature. A nomogram was constructed, and its performance was evaluated by Harrell’s concordance index (C-index), receiver operating characteristic (ROC), and calibration curves. Relationships between the risk score and tumor-infiltrating immune cell abundances were evaluated using CIBERSORTx and TIMER.ResultsNoted, 277 immune-related DEGs were identified. Consecutively, 6 immune genes (CANX, HSPA1B, KLRC2, PSMC6, RFXAP, and TAP1) were identified as risk signature and Kaplan–Meier curve, ROC curve, and risk plot verified its performance in TCGA and CGGA datasets. Univariate and multivariate Cox regression indicated that the risk group was an independent predictor in primary LGG. The prognostic signature showed fair accuracy for 3- and 5-year overall survival in both internal (TCGA) and external (CGGA) validation cohorts. However, predictive performance was poor in the recurrent LGG cohort. The CIBERSORTx algorithm revealed that naïve CD4+ T cells were significant higher in low-risk group. Conversely, the infiltration levels of M1-type macrophages, M2-type macrophages, and CD8+T cells were significant higher in high-risk group in both TCGA and CGGA cohorts.ConclusionThe present study constructed a robust six immune-related gene signature and established a prognostic nomogram effective in risk stratification and prediction of overall survival in primary LGG.</p
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