CRYSTAL GROWTH & DESIGN
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2012
·
IF 4.72
Zi-Zhou Wang,Jia-Mei Chen,Tong-Bu Lu
Four cocrystals of (S-ox)(ga) (1), (RS-ox)(ga) (2), (S-ox)(pa) (3), and (RS-ox)(pa) (4) were prepared (S-ox = S-oxiracetam, RS-ox = racemic oxiracetam, ga = gallic acid, pa = 3,4-dihydroxybenzoic acid), and their structures were determined by single X-ray diffraction. In 1/2, two ga molecules link two S-ox/RS-ox molecules through intermolecular hydrogen bonds with a new R22(9) synthon to form a tetramer, the tetramers are further linked by intertetramer hydrogen bonds to generate a 2D sheet, and the adjacent 2D sheets are connected by intersheet hydrogen bonds to form the 3D structure of 1/2. In 3/4, the ox molecules form a 1D helical chain through intermolecular hydrogen bonds, and the helical chains are further linked by pa molecules through intermolecular hydrogen bonds to form a 2D sheet. The results of hygroscopic stability experiments indicate that the hygroscopic stability of S-ox is much enhanced after the formation of cocrystal 1.
研究领域:
药物化学
·
晶体学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 53
·33626-33636
·
IF 3.361
Leliang Wu,Yiting Lin,Yimin Zhang,Peng Wang,Mingjun Ding,Minghua Nie,Caixia Yan,Shiyao Chen
Alkaline substances could activate peroxymonosulfate (PMS) for the removal of organic pollutants, but relatively high alkali consumption is generally required, which can cause too high pH of the solution after the reaction and lead to secondary pollution. Within this study, PMS activated by a relatively low dosage of Ca(OH)2 (1 mM) exhibited excellent efficiency in the removal of bisphenol S (BPS). The pH of the solution declined to almost neutral (pH = 8.2) during the reaction period and conformed to the direct emission standards (pH = 6–9). In a typical case, BPS was completely degraded within 240 min and followed the kinetics of pseudo-first-order. The degradation efficiency of BPS depended on the operating parameters, such as the Ca(OH)2, PMS and BPS dosages, initial solution pH, reaction temperature, co-existing anions, humic acid (HA), and water matrices. Quenching experiments were performed to verify that singlet oxygen (1O2) and superoxide radicals (O2˙−) were the predominant ROS. Degradation of BPS has been significantly accelerated as the temperature increased. Furthermore, degradation of BPS could be maintained at a high level across a broad range of pH values (5.3–11.15). The SO4−, NO3− did not significantly impact the degradation of BPS, however, both HCO3− and HA inhibited oxidation of BPS by the Ca(OH)2/PMS system, and Cl− had a dual-edged sword effect on BPS degradation. In addition, based on the 4 identified intermediates, 3 pathways of BPS degradation were proposed. The degradation of BPS was lower in domestic wastewater compared to other naturals waters and ultrapure; nevertheless, up to 75.86%, 77.94% and 81.48% of BPS was degraded in domestic wastewater, Yaohu Lake water and Poyang Lake water, respectively. Finally, phenolic chemicals and antibiotics, including bisphenol A, norfloxacin, lomefloxacin hydrochloride, and sulfadiazine could also be efficiently removed via the Ca(OH)2/PMS system.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Huagen Liang,Haoran Wang,Anhu Wang,Ruolin Cheng,Shengyu Jing,Fu Chen,Palanisamy Kannan,Georgia Balkourani,Panagiotis Tsiakaras
Graphitic phase carbon nitride (g-C 3 N 5 ), as a novel n -type metal-free material, is employed as a visible light-receptive catalyst because of its narrow band gap and abundant nitrogen. To overcome the low carrier mobility efficiency of g-C 3 N 5 , its modification by K ions was adopted. In addition, In 2 S 3 was selected to couple with modified g-C 3 N 5 to overcome the recombination of photogenerated e − /h + . As a novel photocatalytic material, it was proven to possess a high visible light absorption capacity and a strong H 2 O 2 production ability (up to 3.89 mmol⋅L -1 in 2 h). Moreover, a S-scheme heterojunction structure was successfully constructed between the two materials, which was tested and confirmed to be successful in raising the photogenerated e − /h + separation efficiency. Ultimately, the primary processes of photocatalytic H 2 O 2 production were summarized by superoxide radical and rotating disc electron measurements. This research provides a fresh perspective for the synthesis of C 3 N 5 -based S-scheme heterojunction photocatalysts for producing H 2 O 2 .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY
·
2025
·
IF 1.1
Haiyan Peng,Min Wu,Chao Yan,Jian Wan,Hongmao Zhang,Shumao Ding
Carbon nanotubes (CNTs) are ubiquitous in the environment and are widely used in industry and medicine, but their unspecified safety has raised concerns. This study aims to explore the potential hazards of carbon nanotubes. This study exposed different concentrations of single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) to HeLa cells. The results showed that exposure to SWCNTs and MWCNTs resulted in slow growth and decreased survival of HeLa cells. The oxidative stress and autophagy of the cells were intensified, the cell division was abnormal, and the number of S-phase cells was reduced. After 100 μg/ml MWCNTs exposure, the proportion of apoptotic cells increased, and the transcript levels of apoptosis-related genes like Caspase-3 and Bcl-2 were upregulated. In addition, each group’s differentially expressed proteins (DEPs) were mainly related to the regulation of protein catabolic process, glycogen metabolic process, nucleotide synthesis and processing, response to reactive oxygen species, and regulation of cell division and apoptosis. These findings suggest that CNTs induce toxic effects through oxidative stress, exacerbating autophagy and apoptosis, and reducing cell viability. Therefore, the harmful effects of CNTs on organisms should be comprehensively considered in their production and utilization.
研究领域:
毒理学
·
细胞生物学
✓ 已验证
产品关联
DOI
高影响因子
ENGINEERING IN LIFE SCIENCES
·
2012
·Vol. 13
·期 2
·194-200
·
IF 1.925
Yuanyuan Yu,Jiugang Yuan,Qiang Wang,Xuerong Fan,Ping Wang,Xuejiao Sun
Cellulases can penetrate into the fiber, causing tensile strength loss of the cellulosic fibers or fabrics. To minimize the tensile strength loss, we have immobilized cellulases on Eudragit S-100. The characteristics of covalent Eudragit cellulase were evaluated using gel filtration analysis and UV spectra. Gel filtration analysis revealed that the cellulases were covalently bound to the polymer. Covalent Eudragit cellulase was loaded with the enzyme of about 40% and had a relative activity about 80% at a Eudragit S-100 concentration of 15 g/L. When cellulase is bound to the polymer, the solubility profile becomes similar to the one of Eudragit. In addition, the effects of the enzyme on the cotton yarns and fabric using cellulases have been investigated. Native and immobilized cellulases caused improvements in whiteness and wrinkle recovery angle of the fabric in comparison to the control samples. The bending stiffness results show that native and immobilized cellulase treated cotton fabric has an improved softness than the control samples. It was found that using the immobilized cellulase reduced the weight and tensile strength, because the hydrolytic attack is only limited to the surfaces of cotton fibers.
研究领域:
生物化学
·
纺织科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yu Peng,Bei Cheng,Liuyang Zhang,Jingjing Liu,Jiaguo Yu
As we all know, formaldehyde (HCHO) is extremely harmful to human health and has been identified as a primary carcinogen by the World Health Organization. Therefore, there is an urgent need to design efficient formaldehyde-sensing materials. In this work, a highly responsive formaldehyde sensor of In 2 O 3 @ZnO derived from MIL-68(In)@ZIF-8 precursor was successfully prepared. By adjusting the ratio of In 2 O 3 and ZnO, it can be found that the performance of the resulting sensor has greatly improved under 100 ppm HCHO at an operating temperature of 220 °C and the detection limit can be as low as 4 ppb. Additionally, it also has excellent selectivity (Q≥10), anti-interference (the deviation value≤3.5%), and long-lasting stability (the variation value≤4%). Such distinguished sensing performance can be attributed to the metal-organic framework (MOF) derived step-scheme (S-scheme) heterojunction , which ultimately increases the adsorption of oxygen and HCHO. This work verifies that ingenious heterojunction construction can significantly improve gas sensing performance.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
TETRAHEDRON LETTERS
·
2020
·
IF 2.275
Youming Huang,Hongyi Chen,Wenting Zheng,Qingle Zeng
A new protocol for the synthesis of (enantioenriched) benzylic sulfones via the Cu 2 O-catalyzed C–S bond cross coupling of alkane-/arene-sulfinates and (enantioenriched) benzylic quaternary ammonium salts has been developed. The product benzylic sulfones were obtained in good to high yields (75–96%). Chiral arylmethyl sulfones with high enantiomeric excess (90–94% ee) were also synthesized in the presence of Cu 2 O and 1,1′-bis-(diphenylphosphino)ferrocene (dppf).
研究领域:
有机化学
·
合成化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Runqian Yang,Rui Xiong,Kunpeng Wang,Yining Jiang,Qian Chen,Liping Ruan
The problem of microwave pollution becomes more serious with the widespread popularity of electronic equipment; the development of microwave absorption materials has assumed critical importance. However, most reported carbon-based microwave absorption materials have no obvious absorption performance in 2–4 GHz (S band), which seriously limits their application. In this work, Ni(OH)2-coated peach pit carbon [Ni(OH)2/C1] is prepared by simple precipitation to achieve a minimum reflection loss (RL) value of −46.2 dB (5.6 mm, at 2.9 GHz) and absorption band cover 2.54–4 GHz in the thickness range of 3.7–6 mm in the S-band. In addition, Ni(OH)2/C1 achieved an RLmin value of −58.05 dB (2.7 mm, at 7.68 GHz) and maximum effective absorption bandwidth (EAB) of 3.95 GHz in the range 2–18 GHz. Our work provides new insights into the microwave absorption in low frequencies and expands the application range and scenarios of carbon-based materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Jie Tian,Yumeng Qi,Junyan Wei,Ahmed Rady,Saleh Maodaa,Ahmed A. Allam,Zunyao Wang,Ruijuan Qu
The degradation process of bisphenol S (BPS) in ozone/peroxymonosulfate (O 3 /PMS) system was systematically explored. The results showed that the removal efficiency of BPS by O 3 could be significantly improved with addition of PMS. Compared with ozonation alone, the pseudo-first-order constant ( k obs ) was increased by 2–5 times after adding 400 μM PMS. In O 3 /PMS system, accelerated removal of BPS was observed under neutral and alkaline conditions. The removal efficiency of BPS reached 100% after 40 s of reaction at pH 7.0, with the k obs of 0.098 s −1 . Moreover, Cu 2+ had a catalytic effect on the O 3 /PMS system, because it could catalyze the decomposition of ozone and PMS to produce •OH and SO 4 •- , respectively. Electron paramagnetic resonance illustrated that •OH and SO 4 •- were the reactive species in O 3 /PMS system. Twelve intermediates were identified by mass spectrometry, and the degradation reactions in O 3 /PMS system mainly included hydroxylation, sulfate addition, polymerization and β-scission. Finally, the toxicity of the products was evaluated by the EOCSAR program. Our results introduce an efficient method for BPS removal and would provide some guidance for the development of O 3 -based advanced oxidation technology .
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Zhipeng Mao,Wei Hao,Wei Wang,Fubin Ma,Chengcheng Ma,Shougang Chen
As an influential antifouling material, photocatalytic materials have drawn attention increasingly over recent years owing to their potential bacteriostatic property in the domain of marine antifouling. Herein, a flower-like BiOI@CeO 2 @Ti 3 C 2 S-scheme photocatalyst was contrived and prepared by hydrothermal method . The innovative combination of Ti 3 C 2 and narrow band gap semiconductor BiOI was implemented to modify CeO 2 and the photocatalytic bacteriostatic mechanism of BiOI@CeO 2 @Ti 3 C 2 was elucidated. Schottky junction was formed between CeO 2 and Ti 3 C 2 , and a p-n junction was formed between CeO 2 and BiOI. By photoelectrochemical characterization, BCT-10 exhibits the best photoelectrochemical performance of which photogenerated carrier transport can be performed more readily at 10 % CeO 2 @Ti 3 C 2 addition. 99.76 % and 99.89 % of photocatalytic bacteriostatic efficiency of BCT-10 against Escherichia coli and Staphylococcus aureus were implemented respectively, which were 2.98 and 3.07 times higher than that of pure CeO 2 . The ternary heterojunction can suppress photogenerated electron-hole complexes more effectively and enhance the photocatalytic bacteriostatic effect of CeO 2 , which also provided a new concept to the further broadened application of CeO 2 in the marine bacteriostatic and antifouling field.
研究领域:
材料科学
·
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiating Liu,Peizeng Yang,Yuefei Ji,Junhe Lu
Sulfate radical (SO 4 •- )-based advanced oxidation processes (SR-AOPs) show great potential in the elimination of organic pollutants in wastewater treatment and groundwater remediation . Tetrabromobisphenol S (TBBPS) as an emerging contaminant can be effectively degraded in SR-AOPs. However, the present study found that SO 4 •- also reacted with ammonium (NH 4 + ), a ubiquitous inorganic nitrogen species in aquatic environments, thus markedly affected the rates and pathways of TBBPS degradation in SR-AOPs. TBBPS underwent β-scission and debromination upon SO 4 •- attack, leading to various transformation products . The released bromide (Br - ) underwent further oxidation by SO 4 •- to form free bromine which reacted with certain TBBPS intermediates, generating disinfection byproducts (DBPs). When NH 4 + was present in such system, the abatement of TBBPS was apparently suppressed. Meanwhile, NH 4 + was oxidized by SO 4 •- to nitrogen dioxide radical (NO 2 • ) which coupled with certain radical intermediates of TBBPS oxidation, yielding nitrophenolic products including 2,6-dibromo-4-nitrophenol (DBNP) and mono-nitro substituted TBBPS. When 10 μM TBBPS was treated by heat activated peroxydisulfate with 1 mM NH 4 + , the molar yield of DBNP reached 22% in 2 h. More importantly, NH 4 + scavenged the in situ formed free bromine to form monobromamine (NH 2 Br), decreasing regulated DBPs formation but leading to highly toxic dibromoacetonitrile (DBAN). This study broadens the understanding of interactions between the transformation of halogens and NH 4 + during SO 4 •- oxidation. It also reveals the potential environmental risks when SR-AOPs are employed for the organohalogen pollutants degradation in realistic environments where NH 4 + is present.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 24
·17376
·
IF 5.6
Mingyu Xue,Xiaohong Xia,Yadi Deng,Fei Teng,Shiyue Zhao,Hui Li,Dejun Hao,Wei-Yi Chen
Alpha-pinene is one of the main defensive components in conifers.Monochamus alternatus(Coleoptera: Cerambycidae), a wood borer feeding on Pinaceae plants, relies on its detoxifying enzymes to resist the defensive terpenoids. Here, we assayed the peroxide level and GST activity ofM. alternatuslarvae treated with different concentrations of α-pinene. Meanwhile, agstgene (MaGSTe3) was isolated and analyzed. We determined its expression level and verified its function. The results showed that α-pinene treatment led to membrane lipid peroxidation and thus increased the GST activity. Expression ofMaGSTe3was significantly upregulated in guts following exposure to α-pinene, which has a similar pattern with the malonaldehyde level. In vitro expression and disk diffusion assay showed that the MaGSTe3 protein had high antioxidant capacity. However, RNAi treatment of MaGSTe3 did not reduce the hydrogen peroxide and malonaldehyde levels, while GST activity was significantly reduced. These results suggested MaGSTe3 takes part in α-pinene adaptation, but it does not play a great role in the resistance ofM. alternatuslarvae to α-pinene.Keywords:glutathione S-transferase;detoxification enzymes;monoterpene
研究领域:
昆虫学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）