INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Liuxing She,Lei Peng,Hang Yuan,Tianrong Zhu,Qiang Fu,Zaikun Wu
The absorption kinetics of CO2 into a novel nonaqueous mixture of 2-amino-2-methyl-1-propanol (AMP) and piperazine (PZ) was studied at atmospheric pressure. The effects of AMP/PZ molar ratio, total concentration, absorption temperature, and inlet flow rate were discussed. The results showed that the composite absorbent with an AMP/PZ ratio of 6:4 had a good effect on the CO2 absorption at 293 K. Unlike relevant reports at home and abroad, the solubility of CO2 in the 1-pentanol solution of AMP and PZ (AMP-PZ-Pentanol) was calculated based on a solution rule model and relevant data from Aspen Plus. The absorption kinetics of CO2 into nonaqueous composite absorbent was analyzed by a double stirred-cell absorber. It shows the enhancement factor increases with the increasing of total concentration but decreases with the increasing of absorption temperature. The absorption mechanism of CO2 in AMP-PZ-Pentanol was determined to be the formation of carbamate by FT-IR, 13C NMR, and XRD analysis. Based on the vapor–liquid equilibrium theory, the reaction heat of CO2 into the phase change absorbent was calculated to be 9.30 KJ mol–1. The results show that the composite absorbent has a lower reaction heat than any single component in it. The desorption experiment of saturated solution shows that the composite absorbent can be completely regenerated in a short period of time, which meets the industrial requirements for CO2 absorbents and will provide a theoretical basis for further industrial applications of this type of absorbent.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Xiaoda Wang,Yuan Gao,Chaoqun Li,Zhixian Huang,Ting Qiu
Liquid–liquid equilibrium data were determined for the two ternary systems of water + thioglycolic acid (TGA) + 2-ethyl-1-hexyl thioglycolate (ETE) and water + 2-ethyl-1-hexyl thioglycolate (ETE) + 2-ethyl-1-hexanol (EHL) at 293.15, 303.15, and 313.15 K under 101 kPa. The nonrandom two-liquid (NRTL) and universal quasi-chemical (UNIQUAC) activity coefficient models were used to correlate the experimental LLE data. The LLE data calculated by the NRTL and UNIQUAC models were in good agreement with the experimental ones.
研究领域:
化学工程
·
物理化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2010
·
IF 1.695
Yihe Wang,Weidong Yan
Densities of binary mixtures of 1,3-diethyl propanedioate with methanol, ethanol, propan-1-ol, propan-2-ol, butan-2-ol, 2-methyl-propan-1-ol, and pentan-1-ol have been measured at temperatures of (288.15, 298.15, 313.15, and 328.15) K using an Anton Paar model DMA 5000 M oscillating densimeter. Excess molar volumes were calculated from these densities. The experimental data were fitted to the Redlich−Kister equation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ETHNOPHARMACOLOGY
·
2024
·
IF 4.8
Yassmin Raafat Hassan,Riham A. El-Shiekh,Hala M. El Hefnawy,Osama G. Mohamed,Karema Abu-Elfotuh,Ahmed M. Hamdan,Alshaymaa Darwish,Ayah M.H. Gowifel,Ashootosh Tripathi,Camilia George Michael
Ethnopharmacological relevance Irvingia gabonensis (Aubry-Lecomte ex O'Rorke) Baill., also known as “African mango” or “bush mango”, belonging to family Irvingiaceae, has been mostly used as food and traditional medicine for weight loss and to enhance the health. Aim of the study The overconsumption of high-fat and high-carbohydrate (HFHC) food induces oxidative stress, leading to neurological and cognitive dysfunction . Consequently, there is an immediate need for effective treatment. Hence, this study explored the efficacy of orlistat , metformin , and I. gabonensis seeds' total aqueous extract (IG SAE) in addressing HFHC-induced cognitive impairment by mitigating oxidative stress and their underlying mechanistic pathways. Materials and methods Initially, the secondary metabolite profile of IG SAE is determined using high-performance liquid chromatography coupled with a mass detector (UHPLC/MS). The in vivo study involves two phases: an established model phase with control (10 rats on a standard diet) and HFHC diet group (50 rats) for 3 months. In the study phase, HFHC is divided into 5 groups. The first subgroup receives HFHC diet only, while the remaining groups each receive HFHC diet with either Orlistat, metformin, or IG SAE at doses of 100 mg/kg and 200 mg/kg, respectively, for 28 days. Results More than 150 phytoconstituents were characterized for the first holistic approach onto IG metabolome. Characterization of IG SAE revealed that tannins dominate metabolites in the plant. Total phenolics and flavonoids were estimated to standardize our extract (77.12 ± 7.09 μg Gallic acid equivalent/mg extract and 8.039 ± 0.53 μg Rutin equivalent/mg extract, respectively). Orlistat, metformin, and IG SAE successfully reduced the body weight, blood glucose level, lipid profile, oxidative stress and neurotransmitters levels leading to improved behavioral functions as well as histological alternation. Also, IG SAE halted inflammation, apoptosis, and endoplasmic reticulum stress, together with promoting autophagy, via modulation of PI3K/AKT/GSK-3β/CREB, PERK/CHOP/Bcl-2 and AMPK/SIRT-1/m-TOR pathways. Conclusion Metformin, orlistat, and IG SAE offer a promising multi-target therapy to mitigate HFHC diet-induced oxidative stress, addressing cognitive function. This involves diverse molecular mechanisms, particularly the modulation of inflammation, ER stress, and both PI3K/AKT/GSK-3β/CREB and AMPK/SIRT-1/m-TOR pathways. Furthermore, the higher dose of IG SAE demonstrated effects comparable to orlistat and metformin across most studied parameters.
研究领域:
民族药理学
·
药理学
·
神经科学
·
代谢组学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
SYNTHESIS-STUTTGART
·
2021
·Vol. 53
·期 14
·2435-2448
·
IF 3.157
Xin Zhou,Qing Long,Dongwei Li,Jingru Gao,Qikai Sun,Shaozi Sun,Yong Su,Peng Wang,Wenjie Peng,Ming Li
Structurally defined and pure oligosaccharides corresponding to β-glucans have attracted great attention because of their potential properties as immunostimulating agents and as antigens of vaccine candidates. We herein describe a convergent synthesis of ready-to-conjugate tridecasaccharides composed of a β-1,3-glucan nonasaccharide backbone and a β-1,6-glucan tetrasaccharide branch. The assembly was achieved by employing trichloroacetimidate glycosylations and features the gram-scale preparation of the nonasaccharide backbone and installation of the tetrasaccharide branch involving orthoester rearrangement to the glycoside.
研究领域:
有机化学
·
生物化学
·
疫苗研究
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2013
·
IF 2.224
Zhuang Zhuang,Libin Yang,Xue Jiang,Feng Xin
Highly b -oriented Titanium Silicalite-1 (TS-1) film grew on the surface of glass modified with TS-1 precursor solution . By means of a facile sol–gel method, the glass surface was covered with TS-1 precursor, which modified the glass surface property to make it suitable for the growth of oriented TS-1 film. The influence of different immersion times for the growth of the oriented TS-1 films on the glasses was studied. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and attenuated total reflection infrared spectra (AT-FTIR) were used to study the crystal orientations , morphologies and the existence of framework Ti of the TS-1 films. The results showed that a highly b -oriented TS-1 monolayer could be prepared with the immersion time of 12 h, following with hydrothermal synthesis at 448 K for 24 h.
✓ 已验证
DOI
高影响因子
Biomaterials Research
·
2026
·
IF 9.8
Yiqiong Yang,Rui Zuo,Yi Wang,Rumeng Liu,Yi Zhou,Jun Wang
Sepsis-induced acute kidney injury (AKI) is characterized by mitochondrial dysfunction and dysregulated inflammation, with a lack of effective therapies. Studies have found that down-regulation of Sirtuin 3 (Sirt3) expression in renal tubular epithelial cells is associated with mitochondrial imbalance, suggesting its potential as a therapeutic target. Based on this, the research team developed a targeted nanodelivery system: black phosphorus nanosheets loaded with a cortistatin agonist were encapsulated with macrophage membranes modified with (KKEEE)₃K peptides to specifically deliver Sirt3-activating components to the kidneys. This nanosystem demonstrated favorable stability and biocompatibility. Ex vivo experiments confirmed its ability to alleviate lipopolysaccharide-induced oxidative stress, apoptosis, and inflammation in HK-2 cells, while restoring mitochondrial function. Mechanistically, the nanomaterial regulates mitochondrial homeostasis by activating the Sirt3–YME1L1 deacetylation axis. This study provides a novel nano-therapeutic strategy for sepsis-induced AKI, combining targeting capability with metabolism regulation, and holds broad implications for the treatment of inflammatory organ damage.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Li Yang,Xiaoyan Yang,Weishuang Fang,Sihao Deng,Lunhua He,Laijun Liu,Alberto J. Fernández-Carrión,Xiaojun Kuang
In this contribution, the novel double-perovskite La 2 Mg(Mg 1/3 Sb 2/3 )O 6 has been successfully prepared by solid-state reaction method, and its structure has been determined for the first time by a combination of X-ray and neutron powder diffraction data analysis. The novel material exhibits a thermal expansion of ∼9.1 ppm/°C and a large optical band gap (4.23 eV). The complex impedance data analysis indicates that La 2 Mg(Mg 1/3 Sb 2/3 )O 6 features a Debye-like behaviour, with a bulk conductivity, σ b , varying between 10 -7 -10 -4 S ‧cm -1 within 500–900 °C temperature range, and activation energy (E a ) of ∼ 1.36 eV. In addition, the microwave dielectric properties of La 2 Mg(Mg 1/3 Sb 2/3 )O 6 sintered at 1625 °C display optimized quality factor (Q× f ) of ∼ 28,700 GHz ( f = 9.65 GHz), a dielectric constant (ε r ) of ∼ 20.2 and temperature coefficient of the resonant frequency ( τ f ) of ∼ − 89 ppm/°C. This work widen the reduced number of A 3 + B 2 / 3 2 + B 1 / 3 5 + O 3 compounds explored so far.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 32
·48638-48647
·
IF 5.19
Li Qian,Tang Zeqin,Zhang Jiahui,Hu Jingtao,Chen Jianmeng,Chen Dongzhi
Simultaneous biodegradation of malodorous 1-propanethiol (PT) and dimethyl sulfide (DMS) by Pseudomonas putida S-1 and Alcaligenes sp. SY1 was investigated and the interactions implicated were explored. Results showed that PT was completely degraded in 33 h, while a lag of 10 h was observed for DMS degradation alone, and the lag was even extended to 81 h in the binary mixture. Mechanism analysis found that the lag was mainly attributed to the exposure of DMS degrader ( Alcaligenes sp. SY1), rather than PT metabolites and PT degrader. The exposure time and PT concentration also influenced the lag duration much. Citric acid could effectively reduce the lag. Pseudo-first-order model was proved suitable for the description of PT degradation, revealing that PT degradation could be enhanced in presence of DMS with a concentration of < 50 mg L −1 . A modified Gompertz model, incorporated the lag phase, was developed for the description of DMS degradation in the mixture, revealing that DMS degradation depended on the initial PT concentration, and when the lag was not considered, PT with low-concentration could promote DMS biodegradation, while a higher concentration (> 20 mg L −1 ) cast negative effect.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2022
·
IF 5.204
Yang Zhang,Yuanlu Cui,Jiyu He,Rongjie Yang
A series of novel 1-oxo-4-hydroxymethyl-2,6,7-trioxy-1-phosphabicyclo[2,2,2]octane (PEPA)-functionalized metallophthalocyanines (PEPA-MPcs, M = Al, Co, Ni, Zn, and Ce) have been successfully synthesized and characterized. The obtained PEPA-MPcs were added to epoxy resin (EP) to prepare a variety of flame retardant composites (EPP-MPcs) and their thermal behavior and flame retardancy were investigated using thermogravimetric analysis (TGA), the limiting oxygen index (LOI), and cone calorimetry. The flame-retardant mechanism was systematically analyzed in the gas and condensed phases, respectively. The highest LOI value of EP containing 2 wt.% PEPA-MPcs was increased by 19% to 27.6% when compared to pure EP. The peak of heat release rate (pHRR) and the total heat release (THR) values observed for EPP-AlPc were reduced by 64.3% and 48.6%, respectively. The main flame retardant mechanism of the PEPA-MPcs is the synergistic effect of the P and N atoms, including the dilution of highly non-flammable gases in the gas phase and the formation of an intumescent char layer from the condensed phase. Furthermore, the char residues of the EPP-MPcs were significantly increased via the catalysis and surface enrichment of the metal atoms, which reduced the fire hazards of the EP composites. In addition, the EPP-MPcs exhibit excellent mechanical properties and uniform dispersions. This work provides a new approach to the preparation of metal containing/non–halogen/phosphorus-containing flame retardants.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2020
·
IF 5.006
Jingjie Luo,Enhui Qu,Yixue Zhou,Yanan Dong,Changhai Liang
Rhenium , although viewed as one of the noble metals with lower-price, has been commonly used as doping element in the bimetallic catalysts due to its middlebrow to activate hydrogen. Its major role as catalyst is less frequently mentioned. In this work, rhenium has been decorated on the surface of activated carbon and used for the selective hydrogenation of dimethyl 1, 4-cyclohexanedicarboxylate (DMCD) to 1, 4-cyclohexanedimethanol (CHDM). Characterizations suggested that ReO x particles were anchored occupying the surface oxygenated groups on pre-functionalized carbon. Rhenium decoration modified both the textural and chemical properties of the samples. Electrons were easily transferred from Re to the neighboring C atoms as a result of the formation of fine ReO x particles. Medium strong acid sites were generated and rhenium species in the reduced states could be still maintained under appropriate rhenium dispersion. The moderate hydrogenation ability of rhenium catalyst partially restrained the excessive hydrogenation of CHDM to other by-products. Rational decoration of 5 wt% Re performed the better catalytic performance with complete conversion of diester and 66 % yield of diol. The specific rate reached 9.5 × 10 2 m m o l D M C D ∙ g R e - 1 ∙ h - 1 at 220 °C under 10 MPa H 2 .
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOTECHNOLOGY
·
2019
·
IF 3.163
Fei Peng,Ying Zhao,Fang-Zhou Li,Xiao-Yang Ou,Ying-Jie Zeng,Min-Hua Zong,Wen-Yong Lou
The asymmetric resolution of racemic 1-phenyl-1,2-ethanediol (PED) to ( S )-PED by Kurthia gibsonii SC0312 ( K. gibsonii SC0312) was conducted in a biphasic system comprised of an organic solvent and aqueous phosphate buffer. The impacts of organic solvents on the whole cell catalytic activity, metabolic activity, membrane integrity, and material distribution were first evaluated. The results showed that all organic solvents, except for dibutyl phthalate, showed a detrimental effect on the metabolic activity of the cells, especially for those with low log P values. All organic solvents were capable of changing the membrane permeability and membrane integrity of the cells. Moreover, some organic solvents showed a good extraction of the oxidation product. Finally, a high yield of 47.7 % of ( S )-PED was obtained by the asymmetric resolution of racemic PED using K. gibsonii SC0312 in a biphasic system under the optimal conditions: racemic PED 120 mM, temperature 35 °C, reaction time 6 h, 180 rpm, and a volume ratio of dibutyl phthalate to aqueous phosphate buffer of 1:1. The optical purity of ( S )-PED increased from 51.3 % to >99 %. This work described an efficient approach to improve reaction efficiency, and constructed a highly effective biphasic reaction system for the fabrication of ( S )-PED via K. gibsonii SC0312.
✓ 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）