ACS Omega
·
2024
·
IF 3.7
Hao Ding,Zhian Huang,Shijie Peng,Hongsheng Wang,Jinyang Li,Ruixiang Wang,Yinghua Zhang,Pengfei Wang
Most dust suppressants used for buildings currently lack sufficient resistance to harsh conditions, such as high temperatures and wind erosion. To solve this problem, it is necessary to develop a new type of dust suppressant. In this study, the guar gum molecule was chemically modified to remove the active hydroxyl group in order to significantly improve the stability and adhesion of guar gum. Eventually, a composite dust suppressant was synthesized by incorporating a surfactant and an absorbent agent into modified guar gum. The functional groups of the reaction products were analyzed via infrared experiments, thus confirming the success of the modification. Wind erosion resistance and scanning electron microscopy experiments confirmed the improved bonding capabilities of the composite dust suppressant with dust particles. In experiments on wind erosion resistance, the dust fixation rate exceeded 50% after the application of the composite dust suppressant. The results of the thermogravimetric tests showed that the maximum mass loss rate of the samples with modified guar gum dust suppressants was 6.0% and 28% lower than those of the samples with unmodified guar gum dust suppressants and water, respectively. Furthermore, the tests conducted on pH value and corrosion resistance indicated that the pH value of this dust suppressant was comparable to that of tap water and demonstrated a similar rate of metal corrosion. The practical significance of this study is to improve the dust suppressant used in buildings, to improve the performance of dust suppressant and resistance to harsh environment, and to help to continuously improve the health of personnel and environmental protection during construction. The practical significance of this study is to improve the dust suppressant used in buildings, to improve the performance of dust suppressant and resistance to harsh environments, and to help to continuously improve the health of personnel and environmental protection during construction, which has positive practical significance for the building industry and related fields.
研究领域:
建筑材料
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Dingqiang Zheng,Lei Shi,Ming Zhang,Weixing Huang,Zhenghui Li,Shoufu Long,Dongsheng Song
To alleviate the global freshwater crisis, a self-floating magnetic Janus biomass composite hydrogel has been fabricated through a rational asymmetric bilayer structure design, which exhibits many merits such as remarkable light-absorption, photothermal conversion, water-evaporation, salt rejection, wind-resistant, etc. Specifically, sodium alginate, cellulose nanofibrils (from corn straw), and acrylic acid were crosslinked by triple interpenetrating networks (chemical cross-linking, ionic cross-linking and hydrogen bonding). Janus hydrogel evaporator was constructed by incorporating the top layer containing light-absorbing core–shell magnetic nanoparticles (Fe 3 O 4 @PDA NPs), and the bottom layer composed of self-floating foam gel due to the addition of foaming agent. Under one solar irradiation, the average evaporation rate and photothermal conversion efficiency of Janus biomass composite hydrogel reached 2.89 ± 0.09 kg·m −2 ·h −1 and 95.66 ± 2.68 %, respectively. Its evaporation stability and salt tolerance capability have been demonstrated by extended period of simulated desalination. Furthermore, Janus biomass composite hydrogel also had excellent mechanical property (ultimate stress of 1.6 MPa) and magnetic performance, which can not only effectively resist the stress induced by wind and waves, but also enable the magnetic maneuvering and wind-resistance floating on the sea. When the input voltage of electromagnet was 24 V, the furtherest response displacement and maximum resisted wind speed were 9 cm and 7.2 m/s, respectively. Therefore, such magnetic self-floating Janus biomass composite hydrogel serving as interfacial solar-driven evaporator system offers a green, efficient and sustainable solution for clean freshwater production.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
Food Bioscience
·
2022
·
IF 5.318
Fangwei Yang,Cheng Wang,Hang Yu,Yahui Guo,Yuliang Cheng,Weirong Yao,Yunfei Xie
The risk of the illegal addition of anti-inflammatory and analgesic chemical drugs in anti-rheumatic health foods should not be ignored. Market supervision and rapid on-site detection technology need to be strengthened. Thin-layer chromatography-surface-enhanced Raman spectroscopy (TLC-SERS), which has the advantages of simple operation, fast separation, and qualitative and quantitative detection, was used in this study. And these eleven chemical drugs (acetaminophen, acetylsalicylic acid, aminophenazone, dexamethasone , diclofenac sodium , hydrocortisone, indometacin, naproxen, phenylbutazone, piroxicam , prednisone 21-acetate) that may be added to anti-rheumatic health foods have been simultaneously identified by TLC-SERS combined with chemometrics method. The characteristic signals of the separated drug spots were collected by SERS, which were optimized by the gold colloidal nanoparticles' volume and integration time. Then SERS was subjected to principal component analysis (PCA) to reduce dimensionality and combined with the pattern recognition methods in chemometrics, such as PCA-Linear Discriminant Analysis (LDA), PCA-K Nearest Neighbor and PCA-Support Vector Machine, and eleven drug components were judged and identified. Moreover, the predictive performances of different models were also analyzed and compared. The results showed that the TLC plate and four organic solvents of petroleum ether, chloroform , ethyl acetate and acetic acid were selected as the developing agent. The dropping amount of gold colloidal nanoparticles and the integration time were set and optimized. The limit of detection of the simultaneous detection method of SERS was 10–100 mg/L. Furthermore, SERS was preprocessed by Gap-Segment 2nd Derivative, and then the PCA-LDA model was established, and the model's prediction accuracy can reach 100%. The method is simple, rapid, sensitive and accurate, and has low experimental instruments and equipment requirements. It is suitable for the on-site simultaneous detection of various anti-inflammatory and analgesic chemical drugs in health foods. It can also provide guarantee and support for the establishment of appropriate rapid detection methods and the development of supervision technology.
研究领域:
分析化学
·
药物分析
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
ANNALS OF THE RHEUMATIC DISEASES
·
2022
·Vol. 81
·期 12
·1647-1653
·
IF 27.973
Cristina Ponte,Peter C Grayson,Joanna C Robson,Ravi Suppiah,Katherine Bates Gribbons,Andrew Judge,Anthea Craven,Sara Khalid,Andrew Hutchings,Richard A Watts,Peter A Merkel,Raashid A Luqmani
Objective To develop and validate updated classification criteria for giant cell arteritis (GCA). Methods Patients with vasculitis or comparator diseases were recruited into an international cohort. The study proceeded in six phases: (1) identification of candidate items, (2) prospective collection of candidate items present at the time of diagnosis, (3) expert panel review of cases, (4) data‐driven reduction of candidate items, (5) derivation of a points‐based risk classification score in a development data set and (6) validation in an independent data set. Results The development data set consisted of 518 cases of GCA and 536 comparators. The validation data set consisted of 238 cases of GCA and 213 comparators. Age ≥50 years at diagnosis was an absolute requirement for classification. The final criteria items and weights were as follows: positive temporal artery biopsy or temporal artery halo sign on ultrasound (+5); erythrocyte sedimentation rate ≥50 mm/hour or C reactive protein ≥10 mg/L (+3); sudden visual loss (+3); morning stiffness in shoulders or neck, jaw or tongue claudication, new temporal headache, scalp tenderness, temporal artery abnormality on vascular examination, bilateral axillary involvement on imaging and fluorodeoxyglucose–positron emission tomography activity throughout the aorta (+2 each). A patient could be classified as having GCA with a cumulative score of ≥6 points. When these criteria were tested in the validation data set, the model area under the curve was 0.91 (95% CI 0.88 to 0.94) with a sensitivity of 87.0% (95% CI 82.0% to 91.0%) and specificity of 94.8% (95% CI 91.0% to 97.4%). Conclusion The 2022 American College of Rheumatology/EULAR GCA classification criteria are now validated for use in clinical research.
研究领域:
风湿病学
·
血管炎
·
临床免疫学
·
诊断学
·
流行病学
·
医学影像学
·
转化医学
✓ 已验证
DOI
PubMed
高影响因子
Matter
·
2023
·
IF 18.9
Xuetao Xu,Ziyun Chen,Xizi Wan,Zhao Wang,Yikai Zhang,Jingxin Meng,Lei Jiang,Shutao Wang
Summary Low-carbon building materials are attracting enormous attention due to the massive energy consumption and carbon emissions from conventional constructions. Existing natural-based building materials are promising for low-carbon constructions but challenging in realizing high mechanical strength for practical applications. Here, inspired by colonial sandcastles, we report the large-scale fabrication of natural-based low-carbon building materials (nLCBMs/±) by a bio-inspired adhesive strategy under low temperature and atmospheric pressure. The as-prepared nLCBMs/± show outstanding compressive strength up to the construction criteria of cement-based materials, hydration-enabled recyclability, and an anti-weathering property. Furthermore, the bio-inspired adhesive strategy is versatile to various grains, such as desert sands, sea sands, concrete slag, coal cinders, and mineral residues. Our finding provides a promising route in accelerating the next-generation construction industry with limited energy consumption and carbon emissions.
研究领域:
土木工程
·
材料科学
·
可持续建筑
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）