JOURNAL OF FOOD SCIENCE
·
2018
·Vol. 83
·期 2
·565-573
·
IF 2.018
Lingying Luo,Yun Bai,Guanghong Zhou
3-Amino-1,4-dimethyl-5H-pyrido[4,3-b]indole (Trp-P-1) is a group 2B carcinogen characterized by the International Agency for Research on Cancer (IARC) and great efforts have been taken to reduce Trp-P-1 mutagenicity to humans. In this study, the effect of a reduction of Trp-P-1 on intestinal absorption as a promising strategy was investigated. The data showed that when 20 mM Trp-P-1 cotransported with 10 mM of sodium carboxymethyl cellulose (CMC), xanthan gum, or carrageenan, the absorption rate of Trp-P-1 was reduced by 31.5%, 49.5%, or 72.9% in MDCK-MDR1 cell monolayer, respectively; and 64.6%, 83.4%, or 64.1% in rat intestinal tissues, correspondingly. These 3 polysaccharides also reduced pharmacokinetic parameters, that is, C max , AUC 0-t , and AUC 0-∞ , after Trp-P-1 was given to rats intragastrically. However, gum arabic did not exhibit similar effects on Trp-P-1 absorption in vitro or in vivo . The Ames test showed that these 3 polysaccharides reduced Trp-P-1 mutagenicity to Salmonella typhimurium TA98, but gum arabic did not. Isothermal titration calorimetry assay indicated that Trp-P-1 interacted with these 3 polysaccharides. Thermodynamic study showed that the actual value of △ H <0, but its absolute value greater than the corresponding value of T∆S, suggest a specific interaction between Trp-P-1 and these 3 polysaccharides, probably through the hydrogen bond and/or ion interaction. Reduction of Trp-P-1 intestinal absorption using food additives could be one of the strategies to suppress Trp-P-1-induced carcinogenesis in human. Practical Application 1. This study provides insightful information for the food industry how gum arabic, xanthan gum, kappa carrageenan, and sodium carboxymethyl cellulose affect the absorption of Trp-P-1. 2. This study also provides novel information regarding a better formulation for meat products to reduce Trp-P-1 absorption.
研究领域:
营养学
·
毒理学
·
食品科学
✓ 已验证
DOI
PubMed
高影响因子
CARBON
·
2024
·
IF 10.5
Lu Xu,Ranran Si,Qi Ni,Jiaan Chen,Jiale Zhang,Qing-Qing Ni
Simultaneously achieving excellent shielding effectiveness (SE) and high absorption rate of flexible electromagnetic interference (EMI) shielding materials has become a growing demand for the new generation of highly integrated electronic devices. This study constructed a double-layer polydimethylsiloxane (PDMS) EMI shielding composite film, with the upper layer using Ni-plated carbon fiber (Ni@CF) as the high absorption loss part and the lower layer using Ag-plated graphene fiber (Ag@GF) as the reflection attenuation part. Due to the synergistic magnetic/dielectric loss effect in the upper layer, high electrical conductivity in the lower layer, and the shielding mechanism of “absorption-reflection-reabsorption” induced by the double-layer structure, this composite film achieves efficient EMI shielding performance and high absorption characteristics in the X-band. The EMI SE values of the 2 mm thick film containing 0.03 wt% Ni@CF and 1.2 wt% Ag@GF reach 33.7 dB, while shielding effectiveness of reflection ( SE R ) and absorption ( SE A ) is 0.8 dB and 32.9 dB, respectively. This result means that the composite film only reflects 17.2 % of the microwaves while shielding 99.9 % and absorbs nearly 82.7 %, exhibiting a significant absorption-dominated shielding mechanism. This flexible and efficient shielding film with a high absorption rate suits portable and wearable intelligent electronic products to reduce secondary electromagnetic pollution.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2020
·
IF 5.797
Gajula Prasad,Jun-Wei Liang,Wei Zhao,Yingbang Yao,Tao Tao,Bo Liang,Sheng-Guo Lu
The effect of a N,N-dimethylformamide (DMF)/acetone solvent system (3:7, 4:6, 5:5, 6:4, 7:3) and spinning medium (air and water) on the membrane morphology and the structure-property relationship were investigated. A facile method was optimized to generate a porous, polymer-fiber membrane via the combinative effect of electrospinning and thermally inducing phase separation of the DMF/acetone (4:6) solvent system in a water medium. The attenuated total reflection (ATR) - Fourier transform infrared (FTIR) results showed an increased β-phase compared to the pristine poly(vinylidene fluoride) (PVDF). The XRD and DSC results further confirmed that the co-existing α- and β-phases in the pristine PVDF were converted into a unique β-phase in the electrospun membranes. In addition, the solvent uptake percentage of the DMF/acetone (4:6) solvent system in a water medium (540) is much greater than that in an air medium (320), and over two times better than that of commercial polyethylene (PE) membranes (190). Similarly, the discharge capacity of the PVDF membrane separator prepared with the DMF/acetone (4:6) solvent system in a water medium is higher than that of the air medium. This enhancement of solvent uptake might be due to the interconnected porous morphology present in the water medium.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Solar RRL
·
2020
·Vol. 5
·期 3
·2000620
·
IF 7.527
Liuxu Yu,Xiangzhao Zhang,Guiwu Liu,Jian Yang,Wenkui Cao,Junlin Liu,Guanjun Qiao
Good thermal shock resistance and high absorptivity in a wide spectral range, as the two key aspects of photothermal coating in high-temperature applications, are seldom realized simultaneously. Herein, it is reported that a reticular porous Ca-doped LaCrO 3 perovskite photothermal coating fabricated by a simple process presents excellent thermal shock resistance between 1200 °C and room temperature and optical absorptivity of ≈94% in the wavelength range of 0.3–14 μm. The high-temperature sintering after screen printing triggers significant variations in the microchemistry and microstructure of the Ca-doped LaCrO 3 coatings, and the experimental analyses and the first-principles calculation demonstrate that the appropriate doping of Ca 2+ causes lattice distortion, decreases the lattice parameters and bandgap, and effectively enhances interactions between the photon and carrier, resulting in the high optical absorptivity in the visible, near-, and mid-infrared ranges. The reticular porous microstructure and interfacial diffusion bonding between the coating and Al 2 O 3 substrate with a gradient transition layer contribute to the high-temperature thermal shock resistance. Herein, a novel way to fabricate a high-performance and low-cost photothermal conversion coating is provided, which presents a broad application prospect in energy harvesters and sensors.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2025
·
IF 2.3
Jianfeng Wu,Jiaqi Yu,Xiaohong Xu,Yaqiang Shen,Deng Zhang,Lingyun Hu
In solar thermal power generation (STPG) systems, materials with high absorptivity and low emissivity are essential for efficient solar radiation capture and minimal thermal energy loss. This study explores the impact of ZnO on the optical properties of corundum-spinel composite ceramics. A material with high absorptance (92.60%) and low emittance (80.72%) was developed, showing excellent thermal shock resistance. The ZnAl 2 O 4 formed from ZnO and Al 2 O 3 enhances light absorption through electron transitions. Additionally, ZnAl 2 O 4 suppresses grain growth, reducing grain size and increasing phase boundaries, promoting light scattering and extending photon transport paths. These structural changes, along with defect sites, further boost absorptivity. ZnAl 2 O 4 also reduces mid-infrared emissivity, lowering overall infrared radiation. The material's combination of high absorptivity, low emissivity, and thermal stability makes it a strong candidate for STPG applications.
研究领域:
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Mai Ouyang,Kehui Hu,Qianwen Jiang,Qingda Yao,Hualong Zhou,Yupei Deng,Yiyue Shen,Fahui Li,Linghua Zhuang,Guowei Wang
Chrome tanning agent is the most widely used tanning agent with the best performances of finished leather , but the traditional chrome tanning process poses severe challenges because of the serious chromium pollution, thus the upgrading of cleaner chrome tanning process is imminent. In order to reduce the residual chromium in wastewater and increase the utilization rate of chrome tanning agent, 4-acetyl-heptanediate (AHA), a high exhaustion chrome auxiliary , was developed and applied in chrome retanning process. The results showed that AHA chrome retanning processes (AHA-6 and AHA-4) significantly reduced the chromium content in wastewater by 48.14% and 47.57%, and increased the chromium content in leather by 102.14% and 82.43%. COD and TDS values decreased by 43.82% and 31.46% with AHA-4 method. The addition of AHA obviously reduced the chromium concentration of wastewater, improved the chromium absorption rate, and promoted the cleaner chrome retanning process, which satisfied with the overall requirements of modern sustainable leather industry. The formation of AHA and chromium (III) was discussed using Gaussian 16 program to explain the high exhaustion chrome tanning agent mechanism. The work will guide on design and preparation of new high exhaustion chromium tanning agents for clean leather production.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 37
·46686
·
IF 1.901
Safdar Ali,Farooq Khurum Shehzad,Inamullah Maitlo,Sultan Valiev,Ghulam Muhyodin,Jun Nie
Two types of cryogels were obtained using 2-hydroxyethyl acrylate (HEA) and 2-hydroxyethyl methacrylate (HEMA) by homogeneous mixing with poly(ethylene glycol) diacrylate (PEGDA) as crosslinker at subzero temperature followed by photopolymerization with two different light initiation sources (high-pressure Hg arc lamp and UV-LED).The solution was frozen unidirectionally at −60 °C before polymerization and finally photopolymerized at the same temperature. The cryogels were characterized using photo-DSC, UV–vis and Fourier transform infrared spectroscopy, and scanning electron microscopy techniques. The cryogels cured with an LED light showed a higher polymerization rate and better morphological characteristics than ones cured with a high-pressure Hg arc. The water intake ratio of HEA/PEGDA was higher than HEMA/PEGDA for both curing sources. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46686.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS AND MANUFACTURING PROCESSES
·
2019
·
IF 3.35
Chunyu Wang,Yuhuan Bu,Shenglai Guo,Zhuang Cai,Baojiang Sun,Guangquan Li,Zhonghou Shen
pH-sensitive water and oil dual-absorption material (WODAM) has been successfully synthesized through microemulsion polymerization. Firstly, microemulsions prepared with monomers were analyzed by pseudo-ternary phase diagram. In addition, conductivities of microemulsions were tested to identify microemulsion types. Meanwhile, the factors that affected microemulsion types were analyzed. Then WODAMs were prepared, and the chemical structure was characterized using Fourier transform infrared (FTIR) spectroscopy. Liquid absorption tests indicated that both monomer ratio and microstructure of WODAMs had influences on their water absorption rate (WAR) and oil absorption rate (OAR). In addition, pH sensitivity tests showed that WODAM absorbed much water in neutral and weak alkaline solutions, but little water in strong alkaline solutions. What’s more, liquid absorption tests in cement slurry filtrate (CSF) showed that WODAM was applied to oil well cement. This paper prepared a new self-healing agent, and is of great significance to realize self-healing cement in complex downhole condition.
研究领域:
材料科学
·
化学工程
·
高分子科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Zhengkai Wei,Zhimeng Liu,Xiaowei Fu,Yuechuan Wang,Anqian Yuan,Jingxin Lei
A series of solvent-free waterborne polyurethanes (WPUs) with different soft segment structure were prepared by respectively using different number-average molecular weight ( M n ) of polytetramethylene glycol (PTMG, M n = 1000, 2000, 3000) and poly (1,4-butylene adipate) (PBA, M n = 1000, 2000 3000) as main diol in this paper. Effect of soft segment crystallization on water resistance of WPUs was discussed. The crystallization properties of WPU films were investigated by differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The water resistance was determined by water absorption ratio. DSC and XRD results confirm that there are no crystalline structures in the WPU films which are synthesized with PTMG ( M n = 1000, 2000, 3000) and PBA ( M n = 1000), while the WPU films synthesized with PBA ( M n = 2000 and 3000) have obvious crystalline structures at room temperature. Meanwhile, the WPU films synthesized with PBA ( M n = 2000 and 3000) possess excellent water resistance because the existence of crystalline structure.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Zhihua Li,Ziyi Wang,Yidan Zhang,Ziteng Guo,Bo Zhao,Sainan Liu
Polyurethane elastomers are widely employed as underwater transducer encapsulants, owing to their distinctive mechanical and acoustic properties. However, the lack of hydrophobicity of polyurethanes remains a problem to be resolved. A series of hydrophobic fluorine-modified polyurethanes (FPUs) were synthesized by incorporating 1H,1H,2H,2H-perfluorodecyltriMethoxysilane (FAS-17) into polybutadiene-based polyurethane. These fluorinated chain extenders enhance the hydrophobicity by reducing surface energy and increase physical cross-linking points, thereby improving the material's overall performance. Remarkably, at a FAS-17 content of 4 wt%, the water contact angle of FPU-2 rises to 106.0°, with a water absorption rate of only 0.189%. This corresponds to a substantial 58.6% reduction in water absorption compared to unmodified polyurethane (PU), demonstrating its exceptional hydrophobicity. Additionally, the introduction of fluorine-containing chains enhances mechanical properties, with FPU-2 having an elongation at break (452%) and tensile strength (10.93 MPa). These results demonstrate that fluorinated polyurethane not only retains the essential properties for underwater sound transmission but also significantly improves hydrophobicity.
研究领域:
材料科学
·
声学工程
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR RESEARCH
·
2021
·Vol. 29
·期 10
·727-734
·
IF 2.227
Yang Haiyang,Li Duxin,Yang Jun,Wang Jin,Gan Shunchang,Cao Kaikai,Liu Yufeng
Polyamide-imide (PAI) materials with good heat resistance, excellent friction, wear properties, and low water absorption were prepared by acyl chloride process with diamine monomer containing trifluoromethyl in the side chain. The results showed that PAI prepared from 2,2′-bis(trifluoromethyl)-[1,1′-biphenyl]-4,4′-diamine without flexible hinge group had the best heat resistance, with T g as high as 302.6 °C and T d5% as 490.1 °C. With the increase of the proportion of flexible hinge groups in diamine monomer, the thermal properties of PAI materials would decrease. The wear mechanism of PAI prepared from 2,2′-bis(trifluoromethyl)-[1,1′-biphenyl]-4,4′-diamine was mainly adhesive wear. With the increase of the proportion of flexible hinge groups in diamine monomer, the wear mechanism would change from abrasive wear, slight adhesive wear to severe adhesive wear. The friction coefficient and wear loss of PAI prepared by 1,4-bis(4-amino-2-trifluoromethylphenoxy)benzene were the smallest, which were 0.4706 and 3.5, respectively. PAI synthesized by diamine monomer containing trifluoromethyl had low water absorption and high water contact angle. With the increasing flexibility of monomer containing trifluoromethyl diamine, the elongation at break and tensile strength of the material increased gradually.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2023
·
IF 7.5
Luoming Kang,Airong Li,Yuan Lu,Yuling Ma,Cheng Wang
Mercaptans as volatile organic sulfur compounds would cause environmental pollution. Researches are focused on the removal of mercaptans by solvent absorption method. In this work, a new efficient absorbent of 1-butyl-3-methylimidazolyl alanine ([Bmim]Ala) was prepared and evaluated by the removal of mercaptans from the model gas containing methyl mercaptan (MeSH, 307.6 mg/m 3 ), ethyl mercaptan (EtSH, 201.1 mg/m 3 ) and propyl mercaptan (PrSH, 149.9 mg/m 3 ) in nitrogen. The results showed that the removal rate of MeSH, EtSH and PrSH was 97.77, 98.12 and 100.00%, respectively, at a temperature of 35 °C and a pressure of 1.00 bar for 2 min. After 6 recycling times, [Bmim]Ala remained a good performance for the removal of mercaptans. The desulfurization mechanism was proposed that the absorption sites were mainly on the alanine anion (Ala − ) and Ala − could be replaced by the thiol anion (RS − ) to form a new ionic liquid 1-butyl-3-methylimidazolyl thiolate ([Bmim] + RS − ). Meanwhile, since the electrostatic interaction between -COO − in Ala − and H -g on the imidazolium cation could be destroyed by the -SH group, the -COO − group would interact with mercaptans to form a strong H-bond. The amino in Ala − and the -SH group could form Lewis acid-base compounds.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）