Frontiers in Chemistry
·
2024
·
IF 3.8
Ali S. Alkorbi,Nouman Gill,Muhammad Naveed Anjum,Muhammad Jawwad Saif,Mirza Nadeem Ahmad,Muhammad Bilal Qadir,Zubair Khaliq,Mohd Faisal,Mohammed Jalalah,Farid A. Harraz
Industrial dye effluent causes significant risks to the environment. The present study was focused on photocatalytic degradation of the dye Direct Red 28 using a ternary composite of graphitic carbon nitride, TiO2, and polyorthoanisidine (g-C3N4/TiO2/POA), prepared by in-situ oxidative polymerization o-anisidine. The synthesized composite g-C3N4/TiO2/POA properties were characterized using different analytical techniques. X-ray diffraction (XRD) results revealed the prominent pattern of TiO2 and g-C3N4 in the composite peak at 2θ° while Fourier transform infrared (FTIR) results provided the confirmation peaks for g-C3N4/TiO2/POA and POA at 1,110 cm−1 and 1,084 cm−1 for C-O-C ether. Scanning electron microscopy (SEM) demonstrated an increase in the average size of the composite up to 428 nm. The energy-dispersive X-ray spectroscopy (EDX) spectrum provided the weight percentages of the C, O, and Ti in the composite were 8.5%, 45.69%, and 45.81%, respectively. The photocatalytic degradation of Direct Red 28 dye under UV irradiation using a composite showed that 86% Direct Red 28 dye was degraded by a 30 mg/L dose of g-C3N4/TiO2/POA in 240 min at pH 2. After four consecutive cycles, the utilized composite showed 79% degradation of Direct Red 28, demonstrating the stability and effectiveness of the g-C3N4/TiO2/POA photocatalyst. The high reusability and efficiency of the g-C3N4/TiO2/POA composite are due to increased light absorption range and reduced e−/h+ recombination rate in the presence of g-C3N4 and POA.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Huihui Zhang,Lushi Tan,Zhejuan Zhang,Guirong Zhang,Jiaxing Lu
In this work, different mass percentage of activated carbon (YBC) doped carbon paste electrodes (YBCPE) were firstly prepared, then electrodeposition of Pt nanoparticles was performed at a constant potential -0.1 V vs. Ag|AgCl|KCl (3 M) to prepare working electrodes Pt/YBCPE. It was shown that Pt/YBCPE(16%) exhibits the highest mass activity for formaldehyde oxidation compared to platinum deposited on pure carbon paste electrode (CPE) and other YBCPE(X%) electrodes. Afterwards, poly-o-anisidine (POA) film was prepared by electro-polymerization onto the CPE and YBCPE(16%) in o-anisidine monomer solution at 0.7 V and then Pt nanoparticles were electro-deposited at the POA film surface for fabrication of the Pt/POA/CPE and Pt/POA/YBCPE composite electrodes. The morphology of the composite electrodes was characterized by SEM, TEM, XRD and XPS which revealed that the presence of YBC and POA in the composite electrodes significantly improves the dispersion of Pt nanoparticles on the electrodes. Electrochemical impedance spectroscopy (EIS), chronoamperometry and cyclic voltammetry were used to verify the conductivity and durability of the composite electrode and its electro-catalytic activity. The obtained results indicated that the Pt/POA(16mC)/YBCPE(16%) exhibits excellent electro-catalytic activity towards the formaldehyde oxidation owing to the synergistic effect of the support-catalyst. Some comparisons for the electrooxidation of formaldehyde and the electrooxidation of methanol and formic acid on the composite electrodes also were conducted.
研究领域:
材料科学
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电化学
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环境科学
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DOI
高影响因子
Kuwait Journal of Science
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2025
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IF 1.1
Mirza Nadeem Ahmad,Muhammad Naveed Anjum,Akbar Ali,Rabeya Ijaz,Sarosh Iqbal,Rashad Al-Salahi,Hatem A. Abuelizz,Cedric Delattre
The synthesis of poly( o -anisidine)/multi-walled carbon nanotubes composite (POA/MWCNTs NC) was carried out via chemical oxidative polymerization for the adsorptive removal of Direct Yellow 26 dye (DY 26). In the polymerization, the ammonium persulphate was used as an oxidant along with 4,4′-diaminodiphenylamine dimer as initiator. Then, the structural composition, crystalline properties, absorption behavior, morphology, and surface attributes of both the polymer and the nanocomposite were analyzed by different techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), UV–visible spectroscopy (UV–visible), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller analysis (BET). BET analysis showed significant improvement in the surface area (690 m 2 /g) and porosity (0.216 cm 3 /g) of the composite material as compared to pure POA. Further, the composite was applied for the elimination of DY 26 in aqueous media. Moreover, the adsorption parameters were also optimized like pH, contact time, adsorbent dose and dye concentration. The highest dye removal efficiency was achieved up to 83% against 50 mg/L concentration of dye solution under the conditions of pH at 2, contact time of 30 min, and 2 g amount of the adsorbent. Furthermore, the kinetic studies revealed that the adsorption of DY 26 followed the pseudo first-order rate constant by the polymeric adsorbent.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
·
2017
·Vol. 119
·期 12
·1700243
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IF 2.145
Wenlu Zuo,Xuechao Hu,Yaqiong Yang,Ling Jiang,Lujing Ren,He Huang
p -Anisidine value (AV) is an important and commonly used index to determine the second oxidation statue of edible oils, but it sometimes cannot reflect the concentrations of all the secondary products, such as saturated aldehydes. An improved method for the determination of saturated aliphatic aldehydes (SAA) in docosahexaenoic acid (DHA)-rich oils is developed in this study. This method reduces the aldehyde 2,4-dinitrophenylhydrazone adducts (DNPhydrazones) using 2-picoline borane, which can eliminate the analytical error caused by the isomerism of DNPhydrazone derivatives. The changes of SAA content during the oxidation of DHA-rich oil is subsequently monitored. Acetaldehyde (168.8 µmol kg −1 ) and propionaldehyde (78.5 µmol kg −1 ) are the two main SAAs in fresh oil, and their concentrations increase to 824.8–811.9 µmol kg −1 , respectively, after oxidation for 50 h at 80 °C. Furthermore, a Michael addition reaction is found to significantly reduce the AV of oxidized oils, from 172.5 to 11.7. Moreover, the concentration of SAAs shows no significant difference and could clearly identify the low-quality oil. These results demonstrate that SAA content might be a potential index to identify oxidized oils, which could provide a good supplementary value to the traditional AV index. Practical Applications : The method that has been developed in this study makes it possible to quantify saturated aliphatic aldehydes as markers of oxidation of oils, especially when the panisidine value (AV) cannot correctly assess the levels of secondary products. It could serve as a supplement to the AV index and could be applied to oils, fats, and food products. This work provides quantitative data regarding the amounts of saturated aliphatic aldehydes that can be present in DHA-rich oils during the oxidation process. An improved method for determinig saturated aliphatic aldehydes (SAA) in docosahexaenoic acid (DHA)-rich oils is developed. The changes of SAA content during the oxidation of DHA-rich oil is monitored. Furthermore, a Michael addition reaction is found to significantly reduce the AV of oxidized oils, from 172.5 to 11.7. The concentration of SAAs does not display significant differences and can clearly identify the low-quality oil. These results demonstrate that the SAA content might be a potential index to identify oxidized oils, which could serve as a good supplement to the AV index.
研究领域:
食品科学
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分析化学
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DOI
高影响因子
Pharmaceutics
·
2023
·Vol. 15
·期 6
·1645
·
IF 5.4
Zhe Zhang,Zuyi Chen,Cheng Li,Zhenyu Xiao,Yuan Luo,Xiaochen Pan,Liang Xu,Xuesong Feng
Antisense oligonucleotides (ASONs) have proven potential for the treatment of various diseases. However, their limited bioavailability restricts their clinical application. New structures with improved enzyme resistance stability and efficient drug delivery are needed. In this work, we propose a novel category of ASONs bearing anisamide conjugation at phosphorothioate sites for oncotherapy. ASONs can be conjugated with the ligand anisamide very efficiently and flexibly in a solution. The conjugation sites and the ligand amount both influence anti-enzymatic stability and cellular uptake, resulting in changes in antitumor activity that are detectable by cytotoxicity assay. The conjugate with double anisamide (T6) was identified as the optimal conjugate, and its antitumor activity and the underlying mechanism were examined further in vitro and in vivo. This paper presents a new strategy for the design of nucleic acid-based therapeutics with improved drug delivery and biophysical and biological efficacy.Keywords:oligonucleotide conjugation;anisamide;anti-enzymatic stability;cellular uptake;antitumor activity
研究领域:
药学
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分子生物学
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癌症研究
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DOI
PubMed
高影响因子
Catalysts
·
2023
·Vol. 13
·期 2
·239
·
IF 3.9
Mohammed Jalalah,Zubair Nabi,Muhammad Naveed Anjum,Mirza Nadeem Ahmad,Atta Ul Haq,Muhammad Bilal Qadir,Mohd Faisal,Mabkhoot Alsaiari,Muhammad Irfan,Farid A. Harraz
Growing industry and its effluents create a serious environmental concern. Various industrial wastes such as toxic dyes and volatile organic compounds are posing a threat to a clean environment because of their non-biodegradable nature and high chemical stability. In recent years, the degradation of toxic dyes and drugs by photo-catalysts has gained much importance and proved a successful approach to capture light by hybrid photo-catalysts for decomposing toxic organic molecules. This work presents the synthesis of a poly(o-anisidine)-based composite with graphitic carbon nitride and zinc oxide (POA/g-C3N4/ZnO) and its utilization as a photo-catalyst. Various analytical techniques investigated the synthesized photo-catalysts’ chemical structure, crystallinity, and morphology. The degradation of Congo red dye evaluated the efficiency of the photo-catalyst in an aqueous medium under ultraviolet light. It was revealed that the photo-catalytic activity of the synthesized POA/g-C3N4/ZnO composites show 81.43%, 92.28%, and 87.05% degradation. This sustainable composite will be highly beneficial to treat industrial wastewater to make our environment clean.Keywords:poly(o-anisidine);graphitic carbon nitride;zinc oxide;ternary composite;photo-catalytic degradation;Congo red;industrial wastewater treatment
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
Food Bioscience
·
2023
·
IF 5.2
Yujie Zhu,Xinhong Zheng,Qiaoling Zeng,Rongbin Zhong,Yujing Guo,Feifei Shi,Peng Liang
Large yellow croaker roe phospholipid (LYCRPLs) is a potential antioxidant. In this study, the inhibition of LYCRPLs on fish oil (FO) oxidation was systematically investigated by evaluating peroxide value , acid value, p -anisidine value, thiobarbituric acid value, and volatile compounds in the accelerated oxidation reaction . The results showed that LYCRPLs presented remarkable antioxidant activity and extended FO shelf-life compared with soybean phospholipids. The analysis of volatile compounds elucidated that LYCRPLs mainly inhibited the formation of aldehyde volatile compounds and thus improved the oxidative stability of FO. Moreover, LYCRPLs could effectively improve the thermal stability of FO. This research provides new insights into LYCRPLs as a promising natural antioxidant in the food industry.
研究领域:
食品科学
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营养学
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化学
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DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2022
·Vol. 87
·期 12
·5276-5288
·
IF 3.693
Shiya Liang,Fengjiao Zhang,Songgui He,Weigang Li,Zhenqiang Wu
The deeply oxidized pork fat (PF) is the key in the production of Chi-aroma Baijiu, a Chinese distilled spirit. Previous studies have not proposed an integrated method to promote lipid oxidation of PF, and the formation of volatiles has not been studied. In this work, an efficient method was established to promote lipid oxidation and release of volatiles of pork fat pulp (PFP) in an integrated treatment for the production of Chi-aroma Baijiu. The results showed that the acid value of PFP by lipase pretreatment (T1) was significantly elevated ( p < 0.05), compared to the control (T0). Lipase-blue light-riboflavin-25°C (T2), lipase-open vial-dark-25°C (T3), and lipase-dark-40°C (T4) further promoted lipid oxidation and reached the oxidation level of PFP by F0, while T2 show the best results. The peroxide value of PFP by T2, T3, and T4 was 41.96-, 16.70- and 14.20-fold higher, and the para-anisidine value was 27.13-, 6.94- and 6.70 fold higher than that in T1. The flavor and volatile analyses showed that PFP by T2 had higher response values than T0 at six electronic nose sensors. T2–T4 promoted the release of volatiles and T2 showed the best result. T2 potentially facilitated lipid oxidation, esterification, and substance exchange of PFP, resulting in a higher type (78.57%) and content (114.50%) of volatiles than T0. The integrated treatment with lipase hydrolysis, blue light with riboflavin could promote lipid oxidation and volatiles release to improve production efficiency of deeply oxidized PF. The results would be viably applied to the production of Chi-aroma Baijiu. Practical Application Deeply oxidized pork fat was the key to the production of Chi-aroma Baijiu, while it took a long time (at least 4 months) to prepare. The integrated treatment with lipase hydrolysis, blue light with riboflavin could promote lipid oxidation and volatiles release to improve the production efficiency of deeply oxidized pork fat. The results would be viably applied to the production of Chi-aroma Baijiu.
研究领域:
食品科学
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饮料技术
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化学工程
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生物化学
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DOI
高影响因子
JOURNAL OF FOOD PROTECTION
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2021
·
IF 2.077
Lipeng Han,Ye He,Shujie Wang,Weiwei Cheng,Lukai Ma,Guoqin Liu,Dongxue Han,Li Niu
ABSTRACT Fat-related diseases and chemical hazards produced during the frying process pose a major threat to human health. Coatings have been used as a practical method to reduce the amount of oil and chemical hazards associated with fried foods. Methyl cellulose (MC) and soy protein isolate were used as coating materials to pretreat Chinese fried dough cake (CFDC) before frying. The 1.5% MC concentration was the best choice for coating to simultaneously lower oil and chemical hazards in CFDC. The CFDC prepared using 1.5% MC had 11.3% oil, 73.70 μg/kg acrylamide, 0.15 mg KOH/100 kg acid, 8.54 mmol/kg peroxide, p -anisidine value of 6.36, 0.36 μg/g malondialdehyde, 0.13 μg/g 4-hydroxy-2-( E )-hexenal (HHE), 0.51 μg/g 4-hydroxy-2-( E )-nonenal (HNE), and 4,272 μg/kg glycidyl ester. In contrast, the uncoated CFDC had 19.2% oil, 117.55 μg/kg acrylamide, 0.25 mg KOH/100 kg acid, 14.40 mmol/kg peroxide, p -anisidine value of 9.76, 0.63 μg/g malondialdehyde, 0.23 μg/g HHE, 0.86 μg/g HNE, and 5,758 μg/kg glycidyl ester. MC and soy protein isolate enhanced the oil barrier of the coating film, which effectively reduced the heat transfer coefficients, oil transfer, oil oxidation, and chemical hazards in the CFDC. Our work on this edible coating contributes to methods for control of oil and chemical hazards in fried foods.
研究领域:
食品科学
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营养学
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食品安全
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产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
·
2015
·Vol. 117
·期 7
·1008-1015
·
IF 1.812
Rong Shi,Yi Guo,Frank Vriesekoop,Qipeng Yuan,Shuna Zhao,Hao Liang
In this work we present a study of the influence of a stearic acid–surfactant–tea polyphenols complex (SSTC) on the oxidative and thermal stability of peanut oil under microwave heating and simulated deep fat frying. Changes of the quality parameters of all oil samples containing different SSTCs were very obvious, compared with those of pure peanut oil. Especially for the oil sample containing SSTC-P, the p-anisidine value decreased 48.89% and 14.90% after microwave heating and simulated deep fat frying. For K 232 , it decreased 36.90% and 33.18%, respectively. By GS–MS analysis, the content of unsaturated fatty acids in peanut oil containing SSTC-P was 8.7 times more than that in pure peanut oil after microwave treatment. As an efficient food antioxidant, the self-assembled complex of tea polyphenols in edible oil prepared by this novel method may have great market potential. Practical applications: Oxidation processes are one of the major problems encountered in oil consumption and storage. The addition of natural antioxidants is a major way to inhibit oxidation processes in edible oils. Tea polyphenols are excellent source of phenolic compounds, which have been reported to show good antioxidant activity. The results of this study suggest that oil-soluble tea polyphenols can be prepared based on a stearic acid–surfactant–tea polyphenols complex. The dispersion of SSTC into peanut oil can improve oxidative and thermal stability of edible oil. Therefore, the complex of tea polyphenols in edible oil may have great market potential of food antioxidant. Tea polyphenols solution was used as the aqueous phase. Stearic acid containing appropriate amount of surfactant were poured into a 50 mL centrifuge tube, and kept in a water bath maintained at 80°C and stirred at 500 rpm until a homogeneous clear solution was obtained. Then, the aqueous phase and the oil phase were mixed using a homogenizer at 26 000 rpm for 2 min to form a stable W/O emulsion. The resulting emulsion was frozen rapidly in liquid nitrogen, and lyophilized using a freeze-drying machine for 48 h. Finally, all of the stearic acid–surfactant–tea polyphenols complexes (SSTC) were obtained. The SSTC was dispersed in peanut oil. Oxidation products of the oil sample were analyzed by GC–MS under microwave heating.
研究领域:
食品科学
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化学
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营养学
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产品关联
DOI
高影响因子
Journal of Food Measurement and Characterization
·
2022
·Vol. 16
·期 2
·1404-1415
·
IF 3.006
Tran Thily,Yang Ligang,Zhou Haiteng,Pan Da,Xu Dengfeng,Shi Xiangling,Wang Shaokang,Chen Shiqing,Sun Guiju
This study aimed to evaluate the influence of frozen storage time on the nutritional quality of boxed vegetables prepared with different cooking oils prior to freezing. Two types of vegetables, broccoli and Chinese cabbage, prepared with palm oil (PO) and soybean oil (SBO), were analyzed during their 12-month freezing storage (− 20 °C). The results showed that the nutritional quality of the frozen vegetable products was seriously affected during the storage period. During the storage period, some of the nutritional quality indexes, such as the vitamin C and total phenolic (TP) content, strongly deteriorated by 27–56% and 8.1–8.6%, respectively, whereas the nitrite content was increased by 10–14%. Additionally, a slight change was observed in the nitrate content. Concurrently, the oxidative degradation of the extracted cooking oils was also evaluated, and PO showed better oxidative stability than SBO. The peroxide value (PV), acid value (AV), malondialdehyde (MDA), and anisidine value (AnV) in PO increased less than those in SBO after 12 months at − 20 °C, and the PV, AV, MDA and AnV in PO were lower than those in SBO after frozen storage. On the basis of the findings from this study, PO was recommended as the best oil for the preparation of boxed frozen vegetables to reduce adverse effects during long-term storage.
研究领域:
食品科学
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营养学
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食品贮藏
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产品关联
DOI
高影响因子
Food Chemistry-X
·
2023
·
IF 6.1
Zhiyong Xue,Juan Liu,Qing Li,Yuanyuan Yao,Yalin Yang,Chao Ran,Zhen Zhang,Zhigang Zhou
Lipoic acid ferulate (LAF) was synthesized and its anti-free radical ability in vitro was determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2-azino-bis (3-ethylbenzothiazoline-6-sulfonicacid) (ABTS) assays. Protective effects of LAF in stabilizing fish oil were tested, compared to antioxidants such as lipoic acid, ferulic acid and tert -butylhydroxyquinone (TBHQ) by measuring peroxide values, thiobarbituric acid reactants, p -anisidine values, nuclear magnetic resonance (NMR) spectra and gas chromatography–mass spectrometry (GC–MS) spectra of fish oil during accelerated storage (12 days, 80 °C). The inhibitory effect of these antioxidants on fish oil oxidation followed the order TBHQ ≧ LAF > ferulic acid > lipoic acid. In addition, the omega-3 polyunsaturated fatty acids were the first to be oxidized. The formation of oxidation products followed a first-order kinetic model, and the addition of LAF effectively reduced the reaction rate constants. Therefore, LAF can effectively slow down the formation of oxidative products and prolong the shelf life of fish oil.
研究领域:
食品科学
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化学
·
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）