INDUSTRIAL CROPS AND PRODUCTS
·
2021
·
IF 5.645
Qiuqin Lin,Yuxiang Huang,Wenji Yu
Bamboo cellulose has been widely used as reinforcement for polymers or template material for composites manufacturing due to its high strength-weight ratio and biodegradability. In this work, effects of four extraction methods on the morphology, structure and properties of bamboo cellulose are investigated, including hydrothermal extraction (HT), standard alkali extraction (SA), ambient condition extraction (AC) and two-stage extraction (TS). Among these methods, pure cellulose I with high crystallinity and intact single cell morphology can be obtained by TS. The cellulose extracted by SA have complete cell morphology, mixed structure of cellulose I and II, outstanding toughness and thermal stability. By contrast, there are hemicellulose residues of the cellulose extracted by HT. But it performs better in mechanical properties and thermal stability. The advantage of AC is that the pure cellulose I can be obtained without thermal history, but treatment time is relatively long, resulting in the damage of cellulose morphology.
研究领域:
材料科学
·
生物质材料
✓ 已验证
DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2024
·
IF 3.1
HongXia Chen,Hao Zhou,Zhiwen Qi,Xingying Xue,ChengZhang Wang
Toxicodendron vernicifluum bark has been used for many years as a component in foods and as a traditional herbal medication. Unfortunately, the presence of urushiols, which induce allergies, limits its application. This study used a vortex-blending matrix solid-phase dispersion microextraction technique to extract urushiols from Toxicodendron vernicifluum bark. HPLC was used to evaluate the amounts of the extracted urushiols (15:0, 15:1, 15:2, and 15:3). The modified magnetic adsorbent was prepared through an in situ coprecipitation method and characterized using a variety of techniques. The optimized extraction conditions are as follows: using magnetic Zeolite Socony Mobil-Five as an adsorbent, a 1:2 sample/adsorbent ratio, 2.5 min of vortex-blending time, 4 mL of 0.1% (V/V) trifluoroacetic acid-methanol as the elution solvent and 8 min of ultrasound time. There was good linearity and high repeatability in the method. Furthermore, the limits of detection for the urushiols ranged from 0.20 to 0.50 μg/mL. Under the optimized conditions, 50 compounds were identified by ultra high performance liquid chromatography and quadrupole time-of-flight mass spectrometry. These compounds included 8 phenolic acids, 9 monomeric urushiols, 11 urushiol dimers, 10 other components, and 11 flavonoids. The suggested approach, which has the advantages of few stages and high extraction efficiency over existing extraction procedures, is a potentially useful method for obtaining and evaluating urushiols in raw materials or extracts.
研究领域:
植物化学
·
分析化学
·
药物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Hongying Gao,Yi Lin,Jie Wei,Yike Zhang,Hong Pan,Miaomiao Ren,Jin Li,Liuying Huang,Xi Zhang,Qingyu Huang,Heqing Shen
Toxicological data demonstrate that nanoplastics (NPs) can cause direct adverse health effects. However, a method for quantifying NPs in biological samples is lacking to date. In this study, a diatomite associated coagulation-sedimentation extraction (CSE) protocol was developed to selectively enrich polystyrene nanoplastics (PS-NP) from microplastics (PS-MP) in the digest of animal tissues, which were then analyzed using pyrolysis gas chromatography–mass spectrometry. We demonstrate that 0.02 g of 7-μm diatomite can selectively adsorb 70-nm PS-NP in 5 mL oyster digest. The method works in the range of 0.006–5 μg PS-NP per 0.5 g wet weight tissue, which has been verified via samples of environmentally contaminated oysters and chow diet PS-NP-treated C57BL/6 mice (digestive tract, kidney, and liver tissues). The particle size-dependent colloidization or buoyancy theoretically supported the general CSE procedure. This work will pave the way for assessing human exposure to NPs and associated health risks.
研究领域:
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2018
·
IF 3.909
Zhengyu Hu,Penghui Wang,Hongli Zhou,Yaping Li
Response surface methodology (RSM) combined with a Box–Behnken design (BBD) was used to optimize the hot-water extraction (HWE) conditions which were determined to be: liquid-solid ratio 29.25:1 mL/g, extraction time 1.66 h, extraction temperature 95 °C, the optimized yield of polysaccharides 0.47 ± 0.01% ( n = 3). Hot-water extraction polysaccharides (HWEP) and Microwave-assisted extraction polysaccharides (MAEP) both consist of Rha:Xyl:Ara:Fru:Glu with the molar ratio of 1.05:1.21:3.86:1:3.61:4.5 and 1:1.95:1.72:1.78:4.36:6.18, respectively. Ultrasound-assisted extraction polysaccharides (UAEP) consists of Rha:Xyl:Ara:Fru:Man:Glu with the molar ratio of 1:2.31:5.23:1.05:3.17:4.17:7.89. The molecular weight distribution of HWEP, MAEP and UAEP ranged from 16 kDa to 1698 kDa, 15 kDa to 913 kDa, and 17 kDa to 1118 kDa, respectively. The absorption peaks in FT-IR confirmed the skeletal modes of the pyranose ring in polysaccharides. The second derivative of FT-IR proved difference of polysaccharides obtained from different extraction methods. The antioxidant activity investigations shown all three polysaccharides extracts possess high scavenging activity of DPPH radicals, hydroxyl radical and ABTS+ radical. Polysaccharides from Carex meyeriana Kunth (CMKP) might be potentially used for various practical applications such as medical and food industries, and this paper provides a theoretical basis and reference for further study of CMK.
研究领域:
植物化学
·
食品科学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Yu-Pei Gao,Yuan Yang,Lei Li,Wen-Jing Wei,Hai Xu,Qiang Wang,Ya-Qun Qiu
Ever-growing application of engineering nanoparticles in many sectors of the society requires efficient methods to extract them from soil and sediment, for the sake of environmental protection. In this study, we develop a new method which uses sodium pyrophosphate solution (TSPP, Na 4 P 2 O 7 ) as extratant to extract gold nanoparticle (AuNPs) from soil and sediment under optimized parameters through vortexing, water bath oscillation, ultrasonic bath and precipitation. SP-ICP-MS was used for the detection of number concentration, mass concentration and size distribution of AuNPs in soil. UV irradiation was innovatively used to directly degrade soil organic matter to improve the recovery of AuNPs due to their low recovery rate in rich organic soils. It could be found that the mass fraction recovery increased from 36% (without UV digestion) to 83% (with 48h UV digestion). The extraction method is versatile for different coating layers and wide-ranging particle sizes in real soil and sediment. Therefore, the rapid and efficient characterization and quantification of AuNPs in soil and sediment are achieved, and the researches on the extraction method of AuNPs and their behavior and toxicity assessment in soil environment can be enriched.
研究领域:
环境科学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
Biofuels Bioproducts & Biorefining-Biofpr
·
2023
·Vol. 17
·期 3
·592-601
·
IF 3.9
Liangliang Zhang,Man Xu,Qinhao Guan,Jianchun Jiang,Kang Sun,Emmanuel Manirafasha
Tannin is a chemical compound found in plants such as tea, with yellow or brown as a characteristic color. Tannin is present in any plant species’ wood, stems, barks, leaves, roots, and fruits. However, the tannin contents in those plants are not the same and plants rich in tannin are the most used raw material for industrial-level tannin extraction, such as chestnut. The central purpose of this article was to identify the tannin content of vegetables. In this study, tannins were extracted from 72 plants in China. The contents and purities of tannins, non-tannins and insoluble substances in those studied plants were determined. A gravimetric approach, using hider powder as a precipitate to bind tannins, has been developed to quantify total tannins in plants. The results showed that high contents of tannins (>20%) were found in Pltycarya strobilacea fruit, Quercus acutissima shell, Quercus variabilis shell, Acacia mearnsii bark, Albizia kalkora bark, Camellia oleifera wood, Rosa cymosa root, Rosa laevigata root, Rhus chinensis gallnut, Bruguiera sexangular bark, Kandelia candel bark, Ceriops tagal bark, Lumnitzera racemose bark and Dioscorea cirrhosa tuber. The purity of tannins was more than 70% in some plants: Larix gmelimi bark, Causuarina equisetifolia bark, P. strobilacea fruit, Castanopsis tibetana wood, Quercus aliena shell, Quercus chenii shell and bark, A. mearnsii bark, A. kalkora bark, Bruguiera gymnorrhiza bark, C. tagal bark, K. candel bark and D. cirrhosa tubers . These plants are excellent resources for vegetable tannins in China. © 2023 Society of Industrial Chemistry and John Wiley & Sons Ltd.
研究领域:
植物化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Ting Shi,Gangcheng Wu,Qingzhe Jin,Xingguo Wang
Camellia oil has become one of the most popular edible vegetable oils especially in China. It can be obtained by cold-pressing (CPE), soxhlet extraction (SE), aqueous enzymatic extraction (AEE), and supercritical carbon dioxide extraction (SC-CO 2 ), while research on their efficient identification is limited. Thus, in this study, proton nuclear magnetic resonance ( 1 H NMR) and conventional chemical analysis, respectively coupled to chemometrics, were employed to compare the camellia oils, produced by CPE, SE, AEE, and SC-CO 2 . The results showed an obviously overlapping among those four different extracted camellia oils, in both principal component analysis (PCA) and hierarchical clustering analysis (HCA), when using fatty acids as input variables. While two obtained PCA models showed good discrimination, according to the minor component compositions (α-tocopherol, squalene, stigmasterol, β-sitosterol, β-amyrin and lanosterol) and 1 H NMR spectra, respectively. Additionally, by means of variable importance for the projection (VIP) scores, less 10 dominant 1 H NMR spectra signals were screened out as detailed markers for different camellia oils classification. Therefore, 1 H NMR combined with chemometrics may be applied as an efficient technique to classify different extracted camellia oils and potentially other vegetable oils.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2016
·
IF 4.035
Zhongling Liu,Wei Yu,Hanqi Zhang,Fanbin Gu,Xiangqun Jin
Salting-out homogenous extraction followed by ionic liquid/ionic liquid dispersive liquid-liquid micro-extraction system was developed and applied to the extraction of sulfonamides in blood. High-performance liquid chromatography was applied to the determination of the analytes. The blood sample was centrifuged to obtain the serum. After the proteins in the serum were removed in the presence of acetonitrile , ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, dipotassium hydrogen phosphate , ionic liquid 1-Hexyl-3-methylimidazolium hexafluorophosphate were added into the resulting solution. After the resulting mixture was ultrasonically shaken and centrifuged, the precipitate was separated. The acetonitrile was added in the precipitate and the analytes were extracted into the acetonitrile phase. The parameters affecting the extraction efficiency, such as volume of ionic liquid, amount of dipotassium hydrogen phosphate , volume of dispersant , extraction time and temperature were investigated. The limits of detection of sulfamethizole (STZ), sulfachlorpyridazine (SCP), sulfamethoxazole (SMX) and Sulfisoxazole (SSZ) were 4.78, 3.99, 5.21 and 3.77 μg L −1 , respectively. When the present method was applied to the analysis of real blood samples, the recoveries of analytes ranged from 90.0% to 113.0% and relative standard deviations were lower than 7.2%.
研究领域:
分析化学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2016
·
IF 4.052
Li Ma,Zhaoguang Yang,Qian Kong,Lin Wang
Extraction of arsenic (As) species in leafy vegetables was investigated by different combinations of methods and extractants. The extracted As species were separated and determined by HPLC-ICP-MS method. The microwave assisted method using 1% HNO 3 as the extractant exhibited satisfactory efficiency (>90%) at 90 °C for 1.5 h. The proposed method was applied for extracting As species from real leafy vegetables. Thirteen cultivars of leafy vegetables were collected and analyzed. The predominant species in all the investigated vegetable samples were As(III) and As(V). Moreover, both As(III) and As(V) concentrations were positive significant ( p < 0.01) correlated with total As (tAs) concentration. However, the percentage of As(V) reduced with tAs concentration increasing probably due to the conversion and transformation of As(V) to As(III) after uptake. The hazard quotient results indicated no particular risk to 94.6% of local consumers. Considerably carcinogenic risk by consumption of the leafy vegetables was observed.
研究领域:
环境科学
·
食品安全
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 95
·77581-77588
·
IF 3.84
Jingzhu Zhang,Kun Yu,Qiwei Yang,Zongbi Bao,Zhiguo Zhang,Yiwen Yang,Qilong Ren,Huabin Xing
Natural zwitterionic compounds are widely used as surfactants, drugs and food additives. However, obtaining high-purity zwitterions from biomass remains challenging because of the presence of structurally similar homologues in plants. Here, we developed a novel extraction method to separate zwitterionic phospholipid homologues using ionic liquids (ILs) as extractants. A large distribution coefficient and excellent separation selectivity for phosphatidylcholine (PC) were achieved with hydroxyl-functionalized and carboxyl-functionalized ILs as the extractants. An effective IL–cosolvent extraction strategy was employed in this work to reduce the consumption of IL and improve the extraction efficiency. Additionally, the underlying extraction mechanism was explored using ab initio calculations and dynamic light scattering. The results indicated the existence of multiple hydrogen-bonding interactions between the IL and both the negative and positive moieties of the zwitterion, and the formation of micelles in the IL–cosolvent mixture was also observed. In addition, the effects of the structure and concentration of ILs and the temperature on extraction performance were investigated, and the feasibility of recovery of ILs by electrodialysis was evaluated.
研究领域:
生物化学
·
分离科学
·
材料化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2015
·
IF 4.169
Runyue Zhu,Zhiyong Zhao,Jianhua Wang,Bing Bai,Aibo Wu,Liping Yan,Suquan Song
In this study, a reliable and fast method using a quick, easy, cheap, effective, rugged, and safe (QuEChERS) extraction procedure without any clean-up step was developed for simultaneous extraction of 15 mycotoxins, i.e., aflatoxin B1, aflatoxin B2, aflatoxin G1, aflatoxin G2, aflatoxin M1, aflatoxin M2, deoxynivalenol, 3-acetyldeoxynivalenol, 15-acetyldeoxynivalenol, de-epoxy-DON, zearalenone, α-zearalenol, β-zearalenol, α-zearalanol, and β-zearalanol, from eggs. High-performance liquid chromatography tandem mass spectrometry was used to separate and detect all of the analytes. Electrospray ionization at both negative and positive modes and multiple reaction-monitoring mode were applied to detect these analytes. The main factors, such as extraction time, extraction solvent, evaporation temperature, and pH of the solvent, were carefully optimized to improve the extraction efficiency. The coefficients of determination of the calibration curves ranged from 0.9884 to 0.9998. The recoveries of most of the analytes were between 71.3% and 105.4% at three concentration levels, except for AFB1 that showed recovery rates of not more than 67.5% in all concentrations. The repeatability and intra-lab reproducibility of this method were both lower than 15% and 25%, respectively. The limit of quantification ranged from 0.2 μg/kg to 5 μg/kg. The matrix effect was evaluated and reduced by the use of matrix-matched calibration curves. The validated method was applied in a pilot study to analyze mycotoxin contamination in 12 eggs, and trace amounts of deoxynivalenol, 15-acetyldeoxynivalenol, aflatoxin B1, aflatoxin G2, zearalenone and β-zearalenol were detected in these samples.
研究领域:
食品科学
·
分析化学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Mengtian Yu,Dongpo He,Yuhang Zhang,Dahao He,Xing Wang,Jinghui Zhou
Acanthopanax senticosus has been used to extract active products. However, abundant Acanthopanax senticosus residues (ASR), which contain plenty of lignin are discarded after extraction. An appropriate extraction method should be chosen to obtain the lignin with such desirable properties. Thus, this study investigated the effect of alkali, milled wood, deep eutectic solvent and ethanol methods on the lignin. Lignin obtained from different extraction methods were characterized, yields, chemical structure, thermal behavior, molecular weight and phenolic content were evaluated. The results show that the process of lignin acquisition has a great influence on the properties of lignin. Moreover, the multifarious functional groups exist in lignin macromolecules , such as phenolic, ether groups and other chromophores, conferred good UV resistance to lignin. Among them, the lignin from alkali method has the most phenolic-OH groups and smallest molecular weight result in a good UV-resistant, the SPF value achieves 2.39 at 1% AL content, the alkali method was the best way to make sunscreen blended with cream take various factors into consideration. This study used lignin as a bioactive ingredient to provide UV-resistant property to sunscreen formulations. Furthermore, lignin extracted from Acanthopanax senticosus residue provides a new application for the treatment of herb residue waste.
研究领域:
植物化学
·
材料科学
·
药用植物研究
✓ 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）