JOURNAL OF SEPARATION SCIENCE
·
2023
·Vol. 46
·期 7
·2200823
·
IF 3.1
Gaodan Liu,Simin Feng,Minghui Sui,Bilian Chen,Peilong Sun
In this study, quartz sand with particularly sharp nanoscale edges acted like a nanoscale knife physically cut cells of Polygonatum cyrtonema Hua into nanosized particles and was synergized with natural deep eutectic solvent to extract steroidal saponins of Polygonatum cyrtonema Hua. The natural deep eutectic solvent (choline chloride-lactic acid)-synergistic quartz sand-assisted extraction was optimized using response surface methodology. The steroidal saponins purified with AB-8 macroporous resin were identified using ultra-high-performance liquid chromatography-triple time of flight mass spectrometry. The results showed that the experimental total saponins content value (36.97 ± 0.12 mg dioscin equivalent/g dry weight) at optimal extraction conditions with a temperature of 68°C, a rotational speed of 20 400 rpm, shear time of 4.3 min, the liquid-solid ratio of 38 ml/g, was close to the maximum possible theoretical value (36.64 mg dioscin equivalent/g dry weight). A total of 20 steroidal saponins were identified, among which the content of (25 R )-Kingianoside E was the highest (102.66 ± 3.47 mg/g). Furthermore, a new steroid saponin (3 β ,25 S )-26-( β -D-glucopyranosyloxy)-22-hydroxyfurost-5-en-3-yl 4- O - β -D-glucopyranosyl- β -D-galactopyranoside+Glc was found for the first time. These results revealed that natural deep eutectic solvent-synergistic quartz sand-assisted extraction was an efficient and green method to extract a variety of steroidal saponins.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Xiaowei Liu,Qikun Zhou,Kexin Li,Peng Chen,Miaomiao Ye,Lili Wang
Coagulation is an effective pre-treatment step for ultrafiltration (UF) drinking water treatment but is limited by the inability to regulate membrane fouling , particularly organic and biological fouling. Herein, we propose a permanganate/bisulfite (PM/BS) pre-oxidation enhanced coagulation process (PM/BS + coagulation) as UF pre-treatment and apply it to treat samples of natural surface waters. The results indicate that PM/BS + coagulation demonstrated superior performance in mitigating membrane fouling. For the four different types of real water, the specific membrane flux decline of UF following PM/BS + coagulation was 4.2 %–22 % less than that of UF following coagulation, and PM/BS + coagulation decreased the total filtration resistance by 21.7 %–74.9 % compared to coagulation alone. To achieve the best membrane fouling alleviation, PM/BS was suggested for use with aluminum polychloride-coagulation under optimized oxidation C ox T ox , coagulant dosage, GT value, and sedimentation time. PM/BS + coagulation pre-treatment controlled UF membrane fouling by: 1) directly changing the UF feed water quality (e.g., composition and properties of organic matter, amount and properties of particulate matter , quantity, and metabolic activity of microorganisms) and affecting the foulant characteristics; and (2) indirectly adjusting the foulants' depositional environment (e.g., zeta potential , roughness, hydrophobicity , and interfacial free energy). These two factors influenced the subsequent fouling development. This work highlights the potential of PM/BS + coagulation to assist UF in producing high-quality drinking water while preserving a low membrane fouling propensity.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Huiling Wu,Huangzhao Wei,Xu Yang,Chengyu Jin,Wenjing Sun,Kai Deng,Xin Rong,Gu Bin,Chenglin Sun
Separation of small-molecule carboxylic acids , especially acetic acid, from wastewater is challenging due to its high-water solubility, acidity, and low concentration. In this work, resin-derived spherical activated carbon (RSAC) was directly prepared from resin spheres through facile pre-oxidation and carbonization processes. RSAC was characterized by SEM, N 2 physisorption , XRD, Raman, element analysis and XPS. RSAC showed high removal rates (> 95.8 %) for a variety of small-molecule carboxylic acids. The initial adsorption capacity of acetic acid over RSAC was 23.4 mg/g and 94 % of the removal rate was retained after five successive adsorption-desorption cycles for 1000 mg/L acetic acid. In addition, RSAC showed a high total organic carbon removal rate (> 80 %) for the high-salinity effluent of catalytic wet air oxidation (CWAO) process. The adsorption of acetic acid over RSAC complied with the pseudo-second-order model and Langmuir model ideally, through Vander Waals force and pore-filling effect. Furtherly, discarded resin microspheres were used to prepare spherical active carbon, which showed 88.2 % removal of acetic acid (1000 mg/L). The benign scheme of “treating wastes by wastes” from economical and environmental aspects was realized.
✓ 已验证
产品关联
DOI
高影响因子
Fermentation-Basel
·
2023
·Vol. 9
·期 2
·79
·
IF 3.7
Jiawei Luo,Shan Xiao,Jihui Wang,Bo Wang,Yanxue Cai,Wenfeng Hu
Value-added utilization of pineapple waste is very import for the food industry and environmental protection. In this study, whey protein (2.6%,w/w) was added to pineapple waste in order to make up for the protein deficiency of the raw material and give the final products better flavor characteristics. AutochthonousLactococcus lactisLA5 andHanseniaspora opuntiaeSA2 were used for the co-inoculation of pineapple by-products; during fermentation, the metabolite profiling and microbial community dynamics were investigated. Results showed that the contents of organic acids, total FAAs, total phenolic compounds and flavonoids significantly increased with fermentation, and 152 kinds of peptides were identified in the final products. Relevant analyses demonstrated that dominant strains includingLactococcus lactis,HanseniasporaandSaccharomycesnot only significantly promoted the accumulation of organic acids, total phenols and other active substances, but also inhibited the growth of pathogenic bacteria and further influenced the fermentation process of pineapple waste.Keywords:pineapple by-products;whey protein;metabolites;microbial community;active peptide
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2022
·
IF 4.52
Meng Dong,Ran Xin,Zhi-Yuan Li,Yu-Lian Li,Xu-Hui Huang,Xiu-Ping Dong,Bei-Wei Zhu,Lei Qin
The organic acids in fruits have critical impacts on palatability and flavor . In this paper, we established a method to quantify 21 essential organic acids in animal and plant matrices using HPLC mass spectrometry with high sensitivity and broad applicability. The organic acids in 12 animal and plant matrices were quantified. Additionally, the profile and concentration of organic acids could achieve the classification of samples. The fruit quality traits and important organic acids content during the storage of cherry tomatoes were monitored via our method. Nine organic acids changed significantly in 16 days of storage, especially citric acid , as the most predominant organic acid, decreased from 4260 to 2290 μg/g, leading to a decline in sourness of 46.2 %. In contrast, after 16 days of storage, galacturonic, gluconic, malonic and quinic acids increased by 155 %, 88 %, 162 %, and 112 %, respectively, which had a potential effect on softening and deteriorating of cherry tomatoes.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL DAIRY JOURNAL
·
2023
·
IF 3.1
Hongjuan Li,Yifei Wu,Dongyu Hou,Shujing Zhao,Dan Li,Xiaopeng Wang,Hongbo Li,Jinghua Yu
The emulsion and emulsion gel obtained by pre-emulsifying butter with whey protein isolate (WPI) were applied in processed cheese making. The processed cheese was sterilised at 121 °C or pasteurised at 100 °C for 15 min, then stored at 25 °C or 4 °C. The effects of pre-emulsification and pasteurisation on texture, functional characteristics and Maillard reaction of processed cheese during storage were investigated. WPI emulsions significantly improved the texture and inhibited the free oil released from 25 °C stored cheese, while WPI emulsion gels softened the texture and increased the free oil released. Scanning electron microscopy revealed decreased uniformity of cheese microstructure and an increase in the number of large free fat pools after pre-emulsification. Pre-emulsification process slowed the Maillard reaction of refrigerated stored cheese and reduced the content of Maillard reaction products. This study provided a method for improving the texture defects of room temperature stored cheese.
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Yinsong Si,Jintao Sun,Fujian Liu,Huazhang Shen,Xiaoming Qi,Qiao Xu,Chengliang Zhou,Yu Liu,Yaqin Fu
Flexible composite membrane with strong strength and good thermal performances simultaneously are highly desired in broad fields. Herein, rabbit-hair-like silica/polyimide (SiO 2 /PI) composite nanofibers with super durability are prepared by a simple electrospinning and impregnating process. The embedded hollow SiO 2 microspheres and the bamboo-shaped hollow structure of the composite nanofibers endow the membrane with excellent thermal insulation , while the externally coated thin PI layer provides quite high strength without significantly reducing its thermal stability. The obtained SiO 2 /PI composite membrane demonstrates high tensile strength (19.7 MPa), good flexibility (withstanding dynamic bending at least 20000 cycles), low thermal conductivity (18.7–42.8 mW m −1 K −1 ), multi-cycle friction resistance (500 cycles) and abrupt hot/cold alternation stability (near 400 °C). These excellent properties are mainly attributed to the 3D bonding network of the composite membrane and the impregnating-reinforcing effect on single SiO 2 nanofiber. This composite membrane not only overcomes the low tensile strength and poor durability of pure SiO 2 membrane, but also possesses lightweight and fireproof properties, demonstrating broad prospects in thermal insulation, anti-shock of fire/cold and wearable protective fabrics.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF FOOD PROPERTIES
·
2022
·
IF 3.388
Zhihua Liu,Yezi Yang,Chongzhi Sun,Yang Wu,Xiaobo Li
Mei (Prunus mume) is widely planted in Eastern Asian countries. To evaluate the effect of cultivar and producing origin on the quality of Mei fruit, we studied the phytochemical properties and antioxidant activities of the 16 Mei fruit cultivars from 6 provinces in China, as well as their profiles of 121 volatile compounds, 5 organic acids, 13 minerals, 24 amino acids and 3 active peptides. Multivariate analysis revealed that the four Mei fruit cultivars with a drier climate in Yunnan province had the characteristics of low water moistures and proteins contents, high total acids, soluble solids, flavones, and phenols contents, and high antioxidant activities, which could be distinguished from fruits of other producing areas. Further component analysis showed that Mei fruits were rich in volatile compounds, organic acids (such as citric acid and malic acid), minerals (such as K, Ca, Mg, P, and Fe), and amino acids (such as Orn, Asn, and Asp), and the nutrient composition ratio in different cultivars was different. In conclusion, Mei fruits can be used as nutritious health food and different cultivars focus on different nutritional compositions.
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Cong-Jia Duan,Xu Han,Yuan-Hang Chang,Jian Xu,Gan-Lu Yue,Ying Zhang,Yu-Jie Fu
A novel ternary deep eutectic solvent (DES), consisted of choline chloride, oxalic acid and ethylene glycol, was developed as a green, low-cost and recyclable pretreatment system for multi-stage utilization of Eucommia ulmoides seed shells. Under optimum conditions, 79.7 % hemicellulose and 65.6 % lignin were quickly removed while 84.0 % cellulose was retained. After DES pretreatment , the yield and purity of gutta-percha achieved 85.1 mg/g and 96.2 %, which increased 1.4 and 1.8 folds higher than that of un-treatment ones. Meanwhile, 69.1 % enzymatic digestibility of cellulose was obtained, that was 2.3 folds higher than that of raw substrates. Moreover, 53.6 % low-condensation lignin with aromatic structures and valuable aryl-ether linkages was well collected. Importantly, the DES that has been recycled five runs can still remove 73.9 % hemicellulose and 58.0 % lignin. Overall, the DES was determined to efficiently promote the separation and conversion of high-quality gutta-percha, value-added lignin and high-yield glucose from Eucommia ulmoides seed shells.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·
IF 1.193
Jin-Ling PU,Pei-Hong TONG,Yong-Juan MENG,Jian-Ping LI
A bilayer-structured ZIF-8 composite with dual functions of sensing and recognition was synthesized, with ZIF-8 serving as an electrochemiluminescence (ECL) probe carrier and molecularly imprinted membrane to construct a molecularly imprinted electrochemiluminescence sensor. The inner layer was a ZIF-8 layer loaded with a luminescent probe, which was obtained by the reaction of zinc ions with 2-methylimidazole on the magnetic Au@CoFe 2 O 4 surface in the presence of Ru(bpy) 3 2+ , the composite magnetic particle is marked as ZIF(Ru)/Au@CoFe 2 O 4 . The outer layer was a layer with recognition function using ZIF-8 as an imprinted membrane, which was obtained by a layer-by-layer self-assembly method on the surface of ZIF(Ru)/Au@CoFe 2 O 4 with dopamine (DA) as a template molecule, which was marked as ZIF(MIP)/ZIF(Ru)/Au@CoFe 2 O 4 . After eluting the template molecules, the composite particle was immobilized on the surface of a magnetically controlled glassy carbon electrode (MGCE) to obtain a molecular imprinting (MIP) modified electrode. When dopamine molecules were re-adsorbed by the MIP, a charge/energy transfer between dopamine and Ru(bpy) 3 2+ occurred. It subsequently led to the quenching of electrochemiluminescence, which was used as the basis for the detection of dopamine by a molecularly imprinted electrochemiluminescence sensor. When the dopamine concentration was in the range of 1.0 × 10 −14 –5.0 × 10 −10 mol/L, the ECL intensity change of the sensor and the dopamine concentration had a good linear relationship, and the detection limit was 4.8 × 10 −15 mol/L. The molecularly imprinted electrochemiluminescence sensor was successfully applied to the detection of dopamine in human serum samples.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Nanomedicine
·
2023
·
IF 8
Huiquan Yang,Wenbin Chen,Jun Ma,Jing Zhao,Dongdong Li,Yuyu Cao,Peidang Liu
Background The synergistic effect of nanomaterials and chemotherapeutics provides a novel strategy for the treatment of tumors. Silver nanotriangles (AgNTs) exhibited some unique properties in nanomedicine. Studies on the synergy of silver-based nanomaterials and anti-tumor drugs against gliomas are rare.Materials and Methods Chitosan-coated AgNTs were prepared, followed by characterization using transmission electron microscopy, ultraviolet-visible spectroscopy and X-ray diffraction. The anti-glioma effect of cyclophosphamide (CTX), 5-fluorouracil (5-FU), oxaliplatin (OXA), doxorubicin (DOX) or gemcitabine (GEM) combined with AgNTs in different glioma cell lines (U87, U251 and C6) was assessed by the MTT assay to screen out a drug with the most broad-spectrum and strongest synergistic anti-glioma activity. The intracellular reactive oxygen species (ROS) level, mitochondrial membrane potential (MMP) and cell apoptosis were detected by flow cytometry. The possible underlying mechanisms of the synergy were further investigated with ROS scavenger and specific inhibitors of C-jun N-terminal kinase (JNK), p38 and extracellular signal-regulated kinase 1/2 pathways.Results The synthesized AgNTs were mainly triangular and truncated triangular with an average edge length of 125 nm. A synergistic anti-glioma effect of AgNTs combined with CTX was not observed, and the synergism between AgNTs and 5-FU was cell type-specific. AgNTs combined with OXA, DOX or GEM displayed synergistic effects in various glioma cell lines, and the combination of AgNTs and GEM showed the strongest synergistic activity. A decrease in cell viability, loss of the MMP and an increase in apoptosis rate induced by this synergy could be significantly attenuated by the ROS scavenger N-acetylcysteine and JNK inhibitor SP600125.Conclusion Our results suggested that the combination of AgNTs and GEM possessed broad-spectrum and potent synergistic anti-glioma activity, resulting from cell apoptosis mediated by a ROS-dependent mitochondrial pathway in which JNK might be involved.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2022
·
IF 6.556
Chiyu Ma,Liubing Kong,Xianyou Sun,Yanchi Zhang,Xinyi Wang,Xinwei Wei,Hao Wan,Ping Wang
Uric acid (UA) is the final product of purine metabolism. A high concentration of UA in body fluid may lead to kidney stones, gout, and some cardiovascular diseases. Therefore, the non-invasive daily monitoring of UA is of great significance for both hyperuricemia patients and fit people. However, most of the current detection methods for UA are enzyme-dependent which limits the application scenarios and lacks portable instruments for on-site detection, including optics and electrochemistry . In this work, an enzyme-free and wide-range colorimetric sensor for UA and H 2 O 2 detection was developed based on a mercaptosuccinic acid (MSA)-modified Cu nanoparticles (CuNPs). Under the action of UA or H 2 O 2 , with the cleavage of MSAs on the CuNPs surface, small Cu particles are further aggregated into larger particles with a lightning violet color. With the employment of the multi-channel handheld automatic photometer (MHAP), the concentration of UA and H 2 O 2 can be determined on-site according to the absorbance measurement by the photodiodes. The linear range of UA was 5 μM-4.5 mM with the limit of detection (LOD) of 3.7 μM, while the linear range of H 2 O 2 was 5 mM–500 mM and 5 μM-5 mM with the LOD of 4.3 μM. This approach has been applied to the detection of UA in human urine, providing more possibilities for non-invasive home health monitoring, community medical diagnosis, and broader prospects of on-site disease detection.
✓ 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）