Journal of the Taiwan Institute of Chemical Engineers
·
2015
·
IF 3
Xuemin Xiao,Dandan Liu,Yujun Yan,Zhilin Wu,Zhansheng Wu,Giancarlo Cravotto
Coal-based activated carbons (CAC) were prepared from coal in Xinjiang China by microwave-assisted activation. The effects of preparation conditions on adsorption capabilities of CAC for methylene blue (MB) and iodine were investigated. The microwave activation was carried out with coal activator ratio of 1:3 for 12 min at 700 W of power, the adsorption capacities of the prepared CAC achieved the maximal values of 312 and 1048.19 mg/g for MB and iodine. The increasing of CAR, activation time, and microwave power reduced the surface functional groups and improved the pH PZC of CAC. The BET surface area and total pore volume of CAC prepared were identified as 1770.49 m 2 /g and 0.99 cm 3 /g, respectively. Hence, the work demonstrates that the use of microwave heating for preparing CAC is more rapid, cheaper and efficient. The adsorption behaviors of typical polycyclic aromatic hydrocarbons (PAHs) in ethanol aqueous solution on CAC were also explored. Equilibrium data were favorably described by the Langmuir and Freundlich isotherms, and adsorption kinetics was fitted to the pseudo-second-order model well. The equilibrium adsorption amounts were 117.17 mg/g for pyrene, 111.39 mg/g for phenanthrene, and 78.18 mg/g for naphthalene. Thus, CAC prepared by microwave activation could have a very effective application in removal of these PAHs.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Canadian Journal of Chemistry
·
2023
·Vol. 101
·期 6
·
IF 1.1
Langman Xing,Hongping Quan,Jinyang Zhao,Xiaomei Huang
The viscosity of the heavy oil was closely correlated with its own resin content by comparing three types of crude oil. In this paper, two novel viscosity reducers with characteristic groups in molecular structures were synthesized for Xinjiang heavy oil, namely viscosity reducer 1 (VR-1) and viscosity reducer 2 (VR-2), both of them showed the better viscosity reduction effect on Xinjiang heavy oil and VR-2 was better than VR-1. The measurement results of ultraviolet-visible spectrophotometer and scanning electron microscope showed that the VR-2 had better separation effect for resin than the VR-1. By analyzing the infrared spectrum results of resin molecule, it could be seen that the resin molecule contained more heteroatoms, which could more easily form the stronger hydrogen bonding with VR-2 with more polar groups to result the better resin dispersion effect. Hence, the phenomenon that VR-1 was not as good as VR-2 in improving fluidity of Xinjiang heavy oil was explained.
研究领域:
石油化学
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分子生物学
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DOI
高影响因子
International Journal of Environmental Research and Public Health
·
2017
·Vol. 14
·期 9
·970
·
IF 2.101
Gehui Wang,Jianjiang Lu,Zhenni Xing,Shanman Li,Zilong Liu,Yanbin Tong
Despite risks associated with perfluoroalkyl acids (PFAAs) in many regions, little is known about their prevalence in Xinjiang. We determined the presence of 13 PFAAs in 293 beef muscle and liver samples collected in 22 cities covering northern, southern, and eastern Xinjiang using liquid chromatography, coupled with tandem mass spectrometry. Overall, the average values for PFAAs were relatively low compared with previous studies. Liver presented higher mean levels of total PFAAs at 1.632 ng/g, which was over 60-fold higher than in muscle (0.026 ng/g). Among the PFAAs analyzed, medium-chain compounds were dominant, accounting for more than 70% of the total. Perfluorooctane sulfonate (PFOS) was highly prevalent in the liver with the highest mean concentration (0.617 ng/g) and detection frequency (80%). When comparing the three regions of Xinjiang, we found differences in PFAA profiles, with the northern region showing the highest levels. Furthermore, the average daily intake and hazard ratios of PFOS and perfluorooctanoic acid varied by region, urban/rural environment, gender, ethnicity, and age. The highest risk value of 13 PFAAs was estimated to be 0.837 × 10−3, which is far below 1, indicating that there is no health risk posed by eating beef muscle and liver in Xinjiang.Keywords:perfluoroalkyl acids;muscle;liver;average daily intake;health risk;Xinjiang
研究领域:
环境科学
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毒理学
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DOI
PubMed
高影响因子
PLoS One
·
2015
·Vol. 10
·期 3
·e0116832
·
IF 3.234
Yan-Ling Zheng,Li-Ping Zhang,Xue-Liang Zhang,Kai Wang,Yu-Jian Zheng
Tuberculosis is a major global public health problem, which also affects economic and social development. China has the second largest burden of tuberculosis in the world. The tuberculosis morbidity in Xinjiang is much higher than the national situation; therefore, there is an urgent need for monitoring and predicting tuberculosis morbidity so as to make the control of tuberculosis more effective. Recently, the Box-Jenkins approach, specifically the autoregressive integrated moving average (ARIMA) model, is typically applied to predict the morbidity of infectious diseases; it can take into account changing trends, periodic changes, and random disturbances in time series. Autoregressive conditional heteroscedasticity (ARCH) models are the prevalent tools used to deal with time series heteroscedasticity. In this study, based on the data of the tuberculosis morbidity from January 2004 to June 2014 in Xinjiang, we establish the single ARIMA (1, 1, 2) (1, 1, 1) 12 model and the combined ARIMA (1, 1, 2) (1, 1, 1) 12 -ARCH (1) model, which can be used to predict the tuberculosis morbidity successfully in Xinjiang. Comparative analyses show that the combined model is more effective. To the best of our knowledge, this is the first study to establish the ARIMA model and ARIMA-ARCH model for prediction and monitoring the monthly morbidity of tuberculosis in Xinjiang. Based on the results of this study, the ARIMA (1, 1, 2) (1, 1, 1) 12 -ARCH (1) model is suggested to give tuberculosis surveillance by providing estimates on tuberculosis morbidity trends in Xinjiang, China.
研究领域:
流行病学
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传染病学
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生物统计学
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公共卫生
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预防医学
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DOI
高影响因子
Frontiers in Plant Science
·
2025
·
IF 4.8
Zhipeng Bian,Ying Zhang,Bing Liu,Tao Zhang,Haibin Yuan,Yanhui Lu
Introduction: The cotton aphid (Aphis gossypii Glover) is a major global agricultural pest that damages cotton and numerous other economically significant crops through feeding and virus transmission. It possesses high adaptability and rapid reproduction rates, contributing to widespread resistance to chemical insecticides and thereby reducing the effectiveness of such control methods. It should be noted that plants have developed advanced chemical defense mechanisms over long periods of synergistic evolution, allowing them to synthesize volatile compounds. These compounds not only defend against herbivorous insects but also crucially reduce the development of pest resistance. Consequently, this study strives to explore plant-emitted volatiles as a potential eco-friendly alternative for aphid management.Methods: In this study, we first tested the behavioral responses of A. gossypii to the volatile blends of fifteen native plant species in Xinjiang, China, using a Y-tube olfactometer and cage experiments. We identified six out of fifteen plant species that were repellent to A. gossypii. We then collected the volatile compounds of repellent plants using a headspace collection method and used gas chromatography-mass spectrometry (GC-MS) to identify the key components. The antennal responses of winged A. gossypii to the compounds were evaluated with an antennal potential test. Finally, further testing using a Y-tube olfactometer and Petri dish experiments.Results: We identified six out of fifteen plant species (i.e. Anethum graveolens L., Juglans regia L., Rhaponticum repens L., Karelinia caspia Pall., Launaea polydichotoma Ostenf., and Brassica rapa L.) that were repellent to A. gossypii. We collected the volatile compounds of these six repellent plants and identified thirty-one key components. Our electroantennogram (EAG) tests revealed that sixteen of the thirty-one compounds caused significant antennal responses in winged A. gossypii. Further testing using a Y-tube olfactometer and Petri dish experiments confirmed fourteen compounds that repelled intact, winged cotton aphids.Discussion: Our study report that the volatiles of four plant species – R. repens, K.caspia, L. polydichotoma, and B. rapa – present a significant repellent effect on winged cotton aphids, suggesting that these compounds might be useful for eco-friendly cotton aphid pest management. These results provide essential theoretical foundations and practical knowledge for the application of plantderived repellent volatiles.
研究领域:
昆虫学
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植物化学
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农业生态学
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DOI
PubMed
高影响因子
Frontiers in Plant Science
·
2023
·
IF 5.6
Zhong Haixia,Yadav Vivek,Wen Zhang,Zhou Xiaoming,Wang Min,Han Shouan,Pan Mingqi,Zhang Chuan,Zhang Fuchun,Wu Xinyu
Xinjiang is the largest grape-producing region in China and the main grape cultivation area in the world. The Eurasian grape resources grown in Xinjiang are very rich in diversity. The sugar composition and content are the main factors that determine the quality of berries. However, there are currently no systematic reports on the types and contents of sugars in grapes grown in Xinjiang region. In this research, we evaluated the appearance and fruit maturity indicators of 18 grape varieties during fruit ripening and determined their sugar content using GC-MS. All cultivars primarily contained glucose, D-fructose, and sucrose. The glucose content in varieties varied from 42.13% to 46.80% of the total sugar, whereas the fructose and sucrose contents varied from 42.68% to 50.95% and 6.17% to 12.69%, respectively. The content of trace sugar identified in grape varieties varied from 0.6 to 2.3 mg/g. The comprehensive assessment by principal component analysis revealed strong positive correlations between some sugar components. A comprehensive study on the content and types of sugar will provide the foundation to determine the quality of grape cultivars and effective ways to utilize resources to improve sugar content through breeding.
研究领域:
农学
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食品科学
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植物代谢组学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2023
·
IF 6
Jie Yu,Hongping Quan,Shihao Chang,Zhiyu Huang
The high viscosity characteristics of heavy oil make it difficult to extract, transport and process. Therefore, enhancing the fluidity of heavy oil can effectively improve the economic benefits of heavy oil resource development. Aggregation and precipitation of asphaltenes are the main causes of high viscosity of heavy oil. Asphaltene molecules are able to self-associate by intermolecular forces such as hydrogen bonding and π-π interactions, resulting in the formation of supramolecular aggregates with large particle size, leading to the increasing of viscosity of heavy oil. Fluorine is the most electronegative element and has a strong ability to form hydrogen bonds. This is due to the special role of the element fluorine, including high electronegativity and small atomic radius. In this study, the fluorine-containing copolymer was synthesized and used to disperse asphaltenes. This copolymer was also used for viscosity reduction on heavy oil in a block in Xinjiang, and the viscosity reduction rate (VRR) reached 70.25% at 600 ppm. Possible mechanism of asphaltene dispersion was proposed by fluorescence microscopy, X-ray diffractometry (XRD), scanning electron microscope (SEM), atomic force microscope (AFM) and transmission electron microscopy (TEM). The mechanism of interaction between copolymer and asphaltene by hydrogen bonds was further analyzed by infrared spectroscopy.
研究领域:
石油工程
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材料科学
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化学工程
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 25
·25486-25495
·
IF 2.8
Wang Gehui,Lu Jianjiang,Li Shanman,Liu Zilong,Chang Haisha,Xie Chunbin
The presence of perfluoroalkyl acids (PFAAs) in animal foods is worldwide, and their fate and spatial distribution in Xinjiang are not well understood. In this study, beef muscle and liver collected from five major cities in southern Xinjiang were analyzed ( n = 70) for 13 PFAAs using an ion-pairing method combined with HPLC-MS/MS. Overall, PFAA contamination was widespread, exceeding 50% of samples with concentrations ranged from below the limits of detection to 6.118 ng/g. Perfluorooctane sulfonate, perfluorooctanoic acid, and perfluoroundecanoic acid were the predominant PFAAs of ten detected compounds, with maximum concentrations in Korla liver samples of 2.543, 0.856, and 1.386 ng/g, respectively. When comparing the five cities, the highest levels and detection frequencies were observed in samples from Korla (muscle, 0.013 ng/g; liver, 3.336 ng/g), followed by Yanqi, Akesu, Kashgar, and Hotan. The different pollution patterns and distribution profiles of PFAAs among cities were significantly related to local economy and geographical conditions. In addition, the dietary intake assessments for PFAAs showed that samples originating from Korla had the greatest impact on human health, but the total hazard ratio was 0.814 × 10 −3 , which is far less than 1, indicating that consumption of beef muscle and liver poses no immediate harm to local residents.
研究领域:
环境科学
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食品科学
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毒理学
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产品关联
DOI
PubMed
高影响因子
Foods
·
2025
·Vol. 14
·期 15
·2645
·
IF 5.1
Cong Zhang,Kai Jiang,Yilin Lin,Rui Cui,Hong Wu
In this study, a composite film with dual antioxidant and antibacterial properties was prepared by combining 2% chitosan and 7% gelatin (2:1, w:w), with D-carvone (0–4%) as the primary active component. The effect of D-carvone content on the performance of the composite films was systematically investigated. The results showed that adding 1% D-carvone increased the water contact angle by 28%, increased the elongation at break by 35%, and decreased the WVTR by 18%. FTIR and SEM confirmed that ≤2% D-carvone uniformly bonded with the substrate through hydrogen bonds, and the film was dense and non-porous. In addition, the DPPH scavenging rate of the 1–2% D-carvone composite film increased to about 30–40%, and the ABTS+scavenging rate increased to about 35–40%; the antibacterial effect on Escherichia coli and Staphylococcus aureus increased by more than 70%. However, when the addition amount was too high (exceeding 2%), the composite film became agglomerated, microporous, and phase-separated, affecting the film performance, and due to its own taste, it reduced the sensory quality of the noodles. Comprehensively, the composites showed better performance when the content of D-carvone was 1–2% and also the best effect for freshness preservation in Xinjiang ramen. This study provides a broad application prospect for natural terpene compound-based composite films in the field of high-moisture, multi-fat food preservation, and provides a theoretical basis and practical guidance for the development of efficient and safe food packaging materials. In the future, the composite film can be further optimized, and the effect of flavor can be further explored to meet the needs of different food preservation methods.
研究领域:
食品科学
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高分子科学
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材料工程
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食品包装
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抗菌技术
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抗氧化研究
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产品关联
DOI
PubMed
高影响因子
Petroleum Science
·
2022
·
IF 4.757
He Li,Xian-Bin Huang,Jin-Sheng Sun,Kai-He Lv,Xu Meng,Zhen Zhang
Wellbore instability, especially drilling with water-based drilling fluids (WBDFs) in complex shale formations, is a critical challenge for oil and gas development. The purpose of this paper is to study the feasibility of using hydrophobically modified silica nanoparticle (HMN) to enhance the comprehensive performance of WBDFs in the Xinjiang Oilfield, especially the anti-collapse performance. The effect of HMN on the overall performance of WBDFs in the Xinjiang Oilfield, including inhibition, plugging, lubricity, rheology, and filtration loss, was studied with a series of experiments. The mechanism of HMN action was studied by analyzing the changes of shale surface structure and chemical groups, wettability, and capillary force. The experimental results showed that HMN could improve the performance of WBDFs in the Xinjiang Oilfield to inhibit the hydration swelling and dispersion of shale. The plugging and lubrication performance of the WBDFs in the Xinjiang Oilfield were also enhanced with HMN based on the experimental results. HMN had less impact on the rheological and filtration performance of the WBDFs in the Xinjiang Oilfield. In addition, HMN significantly prevented the decrease of shale strength. The potential mechanism of HMN was as follows. The chemical composition and structure of the shale surface were altered due to the adsorption of HMN driven by electrostatic attraction. Changes of the shale surface resulted in significant wettability transition. The capillary force of the shale was converted from a driving force of water into the interior to a resistance. In summary, hydrophobic nanoparticles presented a favorable application potential for WBDFs.
研究领域:
石油工程
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材料科学
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产品关联
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Yong Qu,Jingmei Liu,Xiaodong Zhou,Lang Liu,Ruitao Ma,Yongguo Su,Chunmei Ma,Pengtao Sun
Low-temperature coal tar (LTCT) is the preferred raw material for the catalytic hydrogenation of coal tar. In order to study and popularize the technology of preparing fuel oil by hydrogenation of LTCT, it is necessary to research its composition and structural characteristics. Heavy hydrogenated coal tar (HHCT) from a company in Xinjiang, which is a mixture of hydrorefined tail oil distillate (>350 °C) and hydrotreated circulating tail oil (>350 °C). To make scientific and customized use of HHCT, the chemical composition and molecular structure characteristics of HHCT and its subcomponents were investigated by using elemental analysis (EA), infrared analysis (FT-IR), and nuclear magnetic resonance (1H NMR and 13C NMR) through fraction separation. Compared to other low-temperature coal tar (LTCT), the content of saturates (SA) in HHCT is 95.01 wt %, considerably higher than other LTCT samples, and the content of aromatics (AR), resins (RE), and asphaltenes (AS) is all much lower than other LTCT samples. Compared with the basic properties, elemental content, and refining performance of other crude oils, HHCT is good-quality oil with relatively small density, high H/C ratio, fewer heteroatoms, and low metal impurities, and is easy to refine and process. FT-IR and NMR results show that HHCT and SA are primarily constituted of long-chain n-alkanes possessing longer aliphatic chains and fewer branched chains. Aromatics are predominantly present in AR and mainly encompass bicyclic and tricyclic aromatics. HHCT and other fractions contain a small quantity of aromatic structures.
研究领域:
能源化学
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石油加工
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燃料化学
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分析化学
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煤化工
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有机地球化学
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材料化学
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产品关联
DOI
PubMed
高影响因子
Frontiers in Nutrition
·
2022
·
IF 6.59
Hui Jiang,Fei Wu,Xi Jiang,Yun-Feng Pu,Li-Rong Shen,Cui-Yun Wu,Hong-Jin Bai
Pear is one of the most popular fruits in the world. With the fruit ripening, a series of physiological changes have taken place in fragrant pear, but up to now, the research on the metabolism and biological activity of phenolic compounds in different growth stages of fragrant pear is still lacking. In this study, four kinds of Xinjiang pears were selected as research objects, and the changes of phenolic content, antioxidant capacity, cell protection and whitening activity during fruit development were analyzed. The results showed that the phenolic content and antioxidant capacity of four pear varieties presented a decreasing trend throughout the developmental stages. The phenolic content and antioxidant activity of the four pears in the young fruit stage were the highest, and the active ingredients of the Nanguo pear were higher than the other three pear fruits. Pear extract could protect cells by eliminating excessive ROS in cells, especially in young fruit stage. The western blot results showed that the extract of fragrant pear in the young fruit stage could inhibit the expression of TYR, TYR1 and MITF in B16 cells, and it was speculated that the extract of fragrant pear in the young fruit stage might have good whitening activity. Therefore, the findings suggest that young pear display a good antioxidant potential and could have a good application prospect in food preservation and health product industry.
研究领域:
食品科学
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药理学
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植物生理学
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生物化学
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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）