In this paper, we show a novel sustainable route for the production of sorption materials for carbon capture technologies by utilizing a general plastic waste. By supporting aminated poly(vinyl ...chloride) on mesoporous silicas, a family of polymer/silica composites was synthesized, characterized and tested gravimetrically for adsorption of CO
2
from the 1 : 1 v/v CO
2
-N
2
mixture. The composites show good adsorption capacity for CO
2
peaking at 12 cm
3
g
−1
for ethylenediamine-treated PVC products on SBA-15 support. The adsorption efficiency (CO
2
: N ratio) is comparable to those observed for other nanoporous materials, such as amine-grafted mesoporous silicas. Ethylenediamine was found to be the best aminating reagent for PVC as the composite prepared from EDA-PVC gave the highest CO
2
adsorption efficiency. Moreover, contact angle measurements suggested a significant improvement in hydrophobicity of the selected composites when they were compared with the unfunctionalized silica supports. This very useful development could make the composites suitable for applications in elevated moisture content environments found in flue vapours of gas-fired power plants.
The paper presents a novel sustainable route for the production of carbon capture materials from general plastic waste.
In this paper, we show a novel sustainable route for the production of sorption materials for carbon capture technologies by utilizing a general plastic waste. By supporting aminated poly(vinyl ...chloride) on mesoporous silicas, a family of polymer/silica composites was synthesized, characterized and tested gravimetrically for adsorption of CO 2 from the 1 : 1 v/v CO 2 –N 2 mixture. The composites show good adsorption capacity for CO 2 peaking at 12 cm 3 g −1 for ethylenediamine-treated PVC products on SBA-15 support. The adsorption efficiency (CO 2 : N ratio) is comparable to those observed for other nanoporous materials, such as amine-grafted mesoporous silicas. Ethylenediamine was found to be the best aminating reagent for PVC as the composite prepared from EDA–PVC gave the highest CO 2 adsorption efficiency. Moreover, contact angle measurements suggested a significant improvement in hydrophobicity of the selected composites when they were compared with the unfunctionalized silica supports. This very useful development could make the composites suitable for applications in elevated moisture content environments found in flue vapours of gas-fired power plants.
Our study compares the attitudes to their lab experience of students in two science subjects, Chemistry and Physics. We found this to be consistent across the disciplines. Laboratory learning is ...appreciated by students, as a means to develop knowledge and skills. Many of the benefits that students report are in line with the aims set out by the American Association of Physics Teachers (AAPT) for practical teaching. This suggests that laboratory teaching in both subjects is meeting its goals and providing a valuable contribution to the education of students.
With advances in genomic sequencing technology, the number of reported gene-disease relationships has rapidly expanded. However, the evidence supporting these claims varies widely, confounding ...accurate evaluation of genomic variation in a clinical setting. Despite the critical need to differentiate clinically valid relationships from less well-substantiated relationships, standard guidelines for such evaluation do not currently exist. The NIH-funded Clinical Genome Resource (ClinGen) has developed a framework to define and evaluate the clinical validity of gene-disease pairs across a variety of Mendelian disorders. In this manuscript we describe a proposed framework to evaluate relevant genetic and experimental evidence supporting or contradicting a gene-disease relationship and the subsequent validation of this framework using a set of representative gene-disease pairs. The framework provides a semiquantitative measurement for the strength of evidence of a gene-disease relationship that correlates to a qualitative classification: “Definitive,” “Strong,” “Moderate,” “Limited,” “No Reported Evidence,” or “Conflicting Evidence.” Within the ClinGen structure, classifications derived with this framework are reviewed and confirmed or adjusted based on clinical expertise of appropriate disease experts. Detailed guidance for utilizing this framework and access to the curation interface is available on our website. This evidence-based, systematic method to assess the strength of gene-disease relationships will facilitate more knowledgeable utilization of genomic variants in clinical and research settings.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Cancer invasion and metastasis have been likened to wound healing gone awry. Despite parallels in cellular behavior between cancer progression and wound healing, the molecular relationships between ...these two processes and their prognostic implications are unclear. In this study, based on gene expression profiles of fibroblasts from ten anatomic sites, we identify a stereotyped gene expression program in response to serum exposure that appears to reflect the multifaceted role of fibroblasts in wound healing. The genes comprising this fibroblast common serum response are coordinately regulated in many human tumors, allowing us to identify tumors with gene expression signatures suggestive of active wounds. Genes induced in the fibroblast serum-response program are expressed in tumors by the tumor cells themselves, by tumor-associated fibroblasts, or both. The molecular features that define this wound-like phenotype are evident at an early clinical stage, persist during treatment, and predict increased risk of metastasis and death in breast, lung, and gastric carcinomas. Thus, the transcriptional signature of the response of fibroblasts to serum provides a possible link between cancer progression and wound healing, as well as a powerful predictor of the clinical course in several common carcinomas.
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DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
In this article, we report a new sustainable synthesis procedure for manufacturing chitosan/silica CO sub(2) adsorbents. Chitosan is a naturally abundant material and contains amine functionality, ...which is essential for selective CO sub(2) adsorptions. It is, therefore, ideally suited for manufacturing CO sub(2) adsorbents on a large scale. By coating chitosan onto high-surface-area mesoporous silica supports, including commercial fumed silica (an economical and accessible reagent) and synthetic SBA-15 and MCF silicas, we have prepared a new family of CO sub(2) adsorbents, which have been fully characterised with nitrogen adsorption isotherms, thermogravimetric analysis/differential scanning calorimetry, TEM, FTIR spectroscopy and Raman spectroscopy. These adsorbents have achieved a significant CO sub(2) adsorption capacity of up to 0.98mmolg super(-1) at ambient conditions (P=1atm and T=25 degree C). The materials can also be fully regenerated/recycled on demand at temperatures as low as 75 degree C with a >85% retention of the adsorption capacity after 4cycles, which makes them promising candidates for advanced CO sub(2) capture, storage and utilisation technology. It captures the carbon: Chitosan-coated mesoporous silica materials have been prepared as a new family of CO sub(2) adsorbents. These adsorbents have achieved a significant CO sub(2) adsorption capacity of up to 0.98mmolg super(-1) at P=1atm and T=25 degree C, and they can also be fully regenerated/recycled at temperatures as low as 75 degree C.
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FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
Abstract
In this article, we report a new sustainable synthesis procedure for manufacturing chitosan/silica CO
2
adsorbents. Chitosan is a naturally abundant material and contains amine ...functionality, which is essential for selective CO
2
adsorptions. It is, therefore, ideally suited for manufacturing CO
2
adsorbents on a large scale. By coating chitosan onto high‐surface‐area mesoporous silica supports, including commercial fumed silica (an economical and accessible reagent) and synthetic SBA‐15 and MCF silicas, we have prepared a new family of CO
2
adsorbents, which have been fully characterised with nitrogen adsorption isotherms, thermogravimetric analysis/differential scanning calorimetry, TEM, FTIR spectroscopy and Raman spectroscopy. These adsorbents have achieved a significant CO
2
adsorption capacity of up to 0.98 mmol g
−1
at ambient conditions (
P
=1 atm and
T
=25 °C). The materials can also be fully regenerated/recycled on demand at temperatures as low as 75 °C with a >85 % retention of the adsorption capacity after 4 cycles, which makes them promising candidates for advanced CO
2
capture, storage and utilisation technology.
Full text
Available for:
FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
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