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  • Hindawi Limited  (6)
  • 1
    Online Resource
    Online Resource
    Effect of -O- on Water Molecule Adsorption and Adsorption Mechanism of Lignite and Coke
    Hindawi Limited ; 2021
    In:  Journal of Chemistry Vol. 2021 ( 2021-10-21), p. 1-10
    Details
    In: Journal of Chemistry, Hindawi Limited, Vol. 2021 ( 2021-10-21), p. 1-10
    Abstract: The high moisture content of lignite restricts its extensive and efficient use. Furthermore, the reabsorption of lignite is also a factor that affects lignite spontaneous combustion. Therefore, it is of great importance to study the process and mechanism of water molecule desorption and adsorption on lignite and coke (25–950°C) to achieve the clean and efficient utilization of lignite and environmental protection. Proton nuclear magnetic resonance (1H-NMR), thermogravimetric analysis, and other techniques were used in this study to explore the water molecule absorption and desorption processes of lignite pyrolysis at different temperatures (25–950°C) and the special contributions of ether bonds to water molecule adsorption. A mechanism of lignite water molecule adsorption was proposed. The results showed that ether bonds played a special role in the water molecule adsorption by pyrolyzed lignite. The ether bond content was greater in the coal samples at 300 and 950°C, which changed the trend of lignite water molecule absorption and the distribution of water (T2) detected in the 1H-NMR experiments and delayed the escape of water molecules during moisture desorption. The total amount of adsorbed water decreased first and then increased in the coal samples as the pyrolysis temperature increased. However, the maximum adsorption interactions of each coal sample increased first and then decreased. This was the result of the interactions between the pores and the oxygen-containing functional groups. Based on the above analysis, water molecule adsorption mechanism models of lignite and coke were constructed. This study offers a new approach for investigating the water molecule adsorption and adsorption mechanisms of lignite and coke.
    Type of Medium: Online Resource
    ISSN: 2090-9071 , 2090-9063
    URL: Article
    DOI: 10.1155/2021/5573498
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2021
    detail.hit.zdb_id: 2393625-3
    detail.hit.zdb_id: 2703077-5
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  • 2
    Online Resource
    Online Resource
    Macerals of Shengli Lignite in Inner Mongolia of China and Their Combustion Reactivity
    Hindawi Limited ; 2016
    In:  Journal of Chemistry Vol. 2016 ( 2016), p. 1-7
    Details
    In: Journal of Chemistry, Hindawi Limited, Vol. 2016 ( 2016), p. 1-7
    Abstract: The macerals, including fusinitic coal containing 72.20% inertinite and xyloid coal containing 91.43% huminite, were separated from Shengli lignite using an optical microscope, and their combustion reactivity was examined by thermogravimetric analysis. Several combustion parameters, including ignition and burnout indices, were analyzed, and the combustion kinetics of the samples were calculated by regression. Fusinitic coal presented a porous structure, while xyloid coal presented a compact structure. The specific surface area of fusinitic coal was 2.5 times larger than that of xyloid coal, and the light-off temperature of the former was higher than that of the latter. However, the overall combustion reactivity of fusinitic coal was better than that of xyloid coal. The combustion processes of fusinitic and xyloid coals can be accurately described by both the homogeneous model and the shrinking core model. The features of xyloid coal agree with the shrinking core model when its conversion rate is 10%–90%. The activation energy of fusinitic coal during combustion can be divided into three phases, with the middle phase featuring the highest energy. The activation energy of xyloid coal is lower than that of fusinitic coal in the light-off phase, which may explain the low light-off temperature of this coal.
    Type of Medium: Online Resource
    ISSN: 2090-9063 , 2090-9071
    URL: Article
    DOI: 10.1155/2016/2513275
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2016
    detail.hit.zdb_id: 2393625-3
    detail.hit.zdb_id: 2703077-5
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  • 3
    Online Resource
    Online Resource
    Optimal Timing of Simethicone Supplement for Bowel Preparation: A Prospective Randomized Controlled Trial
    Hindawi Limited ; 2021
    In:  Canadian Journal of Gastroenterology and Hepatology Vol. 2021 ( 2021-10-27), p. 1-6
    Details
    In: Canadian Journal of Gastroenterology and Hepatology, Hindawi Limited, Vol. 2021 ( 2021-10-27), p. 1-6
    Abstract: Background and Aims. Simethicone (SIM), as an antifoaming agent, has been shown to improve bowel preparation during colonoscopy. However, the optimal timing of SIM addition remained undetermined. We aimed to investigate the optimal timing of SIM addition to polyethylene glycol (PEG) to improve bowel preparation. Methods. Eligible patients were randomly assigned to two groups: the SIM evening group (SIM addition to PEG in the evening of the day prior to colonoscopy) and the SIM morning group (SIM addition to PEG in the morning of colonoscopy). The primary outcome was Bubble Scale (BS). The secondary outcomes were Boston Bowel Preparation Scale (BBPS) and adenoma detection rate (ADR). Results. A total of 419 patients were enrolled in this study. The baseline characteristics of the patients were similar in both groups. No significant differences were observed in terms of BS (8.76 ± 0.90 vs. 8.65 ± 1.16, P  = 0.81), ADR (34.1% vs. 30.8%, P  = 0.47), Boston Bowel Preparation Scale (BBPS) (8.59 ± 0.94 vs. 8.45 ± 1.00, P  = 0.15), and withdrawal time (8.22 ± 2.04 vs. 8.01 ± 2.51, P  = 0.094) between the two groups. Moreover, safety and compliance were similar in both groups. However, the SIM evening group was associated with shorter cecal intubation time (3.80 ± 1.81 vs. 4.42 ± 2.03, P   〈  0.001), higher BS (2.95 ± 0.26 vs. 2.88 ± 0.38, P  = 0.04) in the right colon, and diminutive ADR (62.5% vs. 38.6%, P  = 0.022) in the right colon, when compared to the SIM evening group. Conclusions. The SIM addition to PEG in the evening of the day prior to colonoscopy can shorten cecal intubation time and improve BS scores and diminutive ADR of the right colon compared with the SIM addition to PEG in the morning of colonoscopy in bowel preparation.
    Type of Medium: Online Resource
    ISSN: 2291-2797 , 2291-2789
    URL: Article
    DOI: 10.1155/2021/4032285
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2021
    detail.hit.zdb_id: 2762184-4
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  • 4
    Online Resource
    Online Resource
    Molecular Mechanism for the Regulation of Microcystin Toxicity to Protein Phosphatase 1 by Glutathione Conjugation Pathway
    Hindawi Limited ; 2017
    In:  BioMed Research International Vol. 2017 ( 2017), p. 1-10
    Details
    In: BioMed Research International, Hindawi Limited, Vol. 2017 ( 2017), p. 1-10
    Abstract: Glutathione (GSH) conjugation was an important pathway to regulate the toxicity of microcystins (MCs) targeted to protein phosphatases. To explore the specific molecular mechanism for GSH detoxification, two typical MC-GSHs (derived from MCLR and MCRR) were synthesized, prepared, and purified according to previous research. Then, the reduced inhibition effect for MC-GSHs on protein phosphatase 1 was verified by comparing with their original toxins. To further clarify the molecular mechanism for MC-GSHs detoxification, we evaluated the interactions between MCs/MC-GSHs and PP1 with the assistance of MOE molecule simulation. When GSH was introduced to MCs, the covalent binding (Mdha 7 to Cys 273 ), the hydrophobic interaction (Adda 5 with PP1), the hydrogen bonds (especially for Lys 2 -Arg 96 and Glu 6 -Tyr 272 ), the covalent combination (between Mdha 7 and Cys 273 ), and the ion bonds (between Mn 2+ and Asn 124 /His 248 /Asp 64 /His 66 ) of MCLR/MCRR-PP1 complexes weakened to a certain extent, while the ion bonds between Mn 2+ and His 173 /Asp 92 residues increased. It was not difficult to find that the toxicity of MCs was closely related to the above sites/interactions and the above key information for MCs-PP1; MC-GSHs-PP1 complexes were important for clarifying the detoxification mechanism of MC-GSHs pathway. This study offers a comprehensive cognition on MCs toxicity regulation and provides valid theoretical support to control their potential risk.
    Type of Medium: Online Resource
    ISSN: 2314-6133 , 2314-6141
    URL: Article
    DOI: 10.1155/2017/9676504
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2017
    detail.hit.zdb_id: 2698540-8
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  • 5
    Online Resource
    Online Resource
    CMTM3 as a Potential New Immune Checkpoint Regulator
    Hindawi Limited ; 2022
    In:  Journal of Oncology Vol. 2022 ( 2022-9-20), p. 1-12
    Details
    In: Journal of Oncology, Hindawi Limited, Vol. 2022 ( 2022-9-20), p. 1-12
    Abstract: Objectives. To evaluate the role of CKLF-like MARVEL transmembrane domain containing 3 (CMTM3) in tumor microenvironment and cancer immunotherapy and explore its potential mechanism. Method. The cancer genome map was obtained from the UCSC Xena database. RNAseq data from the Genotype-Tissue Expression (GTEx) and The Cancer Genome Atlas (TCGA) databases were utilized for evaluating the expression and prognostic value of CMTM3 through survival data of clinical trials. The enrichment analysis of CMTM3 was performed using the R package “clusterProfiler.” The scores of immune cell infiltration in TCGA samples were downloaded from the ImmuCellAI database and TIMER2 database, and the relationship between both immune cell invasion and CMTM3 expression was investigated. Immunological activation and suppression genes, immune checkpoints, chemokines, and their receptors were all investigated in relation to CMTM3. Results. Most tumor types had varied levels of CMTM3 expression and predicted poor survival status. The CMTM3 expression is closely associated with cancer-associated fibroblasts, macrophages, myeloid dendritic cells, endothelial cells, immune activation genes, immune suppressor genes, immune checkpoints, chemokines, and related receptors. Conclusion. Our data reveal that CMTM3 might be used as a cancer biomarker. CMTM3 may work in conjunction with other immunological checkpoints to alter the immune milieu, which could lead to the establishment of new immunotherapy medicines.
    Type of Medium: Online Resource
    ISSN: 1687-8469 , 1687-8450
    URL: Article
    DOI: 10.1155/2022/2103515
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2022
    detail.hit.zdb_id: 2461349-6
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  • 6
    Online Resource
    Online Resource
    Impact of an Abdominal Compression Bandage on the Completion of Colonoscopy for Obese Adults: A Prospective Randomized Controlled Trial
    Hindawi Limited ; 2022
    In:  Canadian Journal of Gastroenterology and Hepatology Vol. 2022 ( 2022-9-6), p. 1-8
    Details
    In: Canadian Journal of Gastroenterology and Hepatology, Hindawi Limited, Vol. 2022 ( 2022-9-6), p. 1-8
    Abstract: Background and Aim. Obesity has been linked to incomplete colonoscopy. In the present study, we aimed to determine whether an abdominal compression bandage could improve the complete colonoscopy rate (CCR) of obese patients. Methods. Eligible patients were randomly allocated into the abdominal bandage and conventional groups during a routine colonoscopy. The primary outcome was CCR. Results. A total of 250 eligible patients were randomly assigned to the abdominal bandage and conventional groups from January 2021 to April 2021. Eleven patients (five in the abdominal bandage group and six in the conventional group) were excluded due to schedule cancellation after randomization, and 239 patients were eventually included in the final analysis. There were no significant differences between the two groups regarding baseline characteristics (P  〉  0.05). Furthermore, no significant differences were observed in terms of advanced adenoma detection rate (AADR), polyp detection rate (PDR), bowel preparation scale (BBPS), bubble scale (BS), and withdrawal time between the two groups (P  〉  0.05). However, compared with the conventional group, the cecal insertion time (CIT) of the abdominal bandage group was significantly shortened (279.00 (234.50–305.75) vs. 421.00 (327.00–485.00), P  〈  0.001), and the CCR (96.7% vs. 88.2%, P = 0.01) and adenoma detection rate (ADR) (47.5% vs. 32.8%, P  〈  0.001) were improved. Besides, logistic regression analysis showed that body mass index (BMI) and abdominal compression bandage were associated with CCR. Conclusions. Abdominal compression bandages could effectively shorten CIT and improve CCR and ADR for obese patients during a routine colonoscopy. This trial is registered with the Chinese Clinical Trial Registry (No. ChiCTR2100043556).
    Type of Medium: Online Resource
    ISSN: 2291-2797 , 2291-2789
    URL: Article
    DOI: 10.1155/2022/6010367
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2022
    detail.hit.zdb_id: 2762184-4
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