FOOD CHEMISTRY
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2023
·
IF 8.8
Yumei Qin,Yufei Zhou,Xue Yan,Zihan Qin,Yuezhong Mao,Shiyi Tian
Sweetness is a crucial indicator for identifying sweeteners used for flavor regulation and nutritional matching of foods. This study established a new quantitative sweetness evaluation method based on a combination of transiently transfected sweet taste receptor cells (STRs) and human sensory evaluation. Here, nine different sweeteners were evaluated and 10 sensory difference intensities and their corresponding concentrations were obtained through sensory evaluation. Using the same concentration solution as in the sensory evaluation, the dosage-response curve and EC 50 of the nine sweeteners were obtained by analyzing the intracellular calcium signal fluctuation of STRs. Data analysis revealed that the calcium signal intensity and sweetness intensity under the same concentration of sweetener presented a strong linear correlation (R 2 > 0.9). Additionally, we found a favorable correlation (R 2 = 0.8746) between the relative sweetness and EC 50 . These findings indicate that the quantitative evaluation of sweetness based on STRs could be a potential alternative to human sensory evaluation.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Ying Li,Yuyang Zhang,Rida Javed,Rui Li,Hongbin Zhao,Xing Liu,Chenghui Zhang,Hongmei Cao,Daixin Ye
Recently, nanozymes as an outstanding alternative to natural enzymes has attracted wide attention because of its high stability performance. In this study, P N C nonmetal nanozymes with high oxidase-like activity was synthesized can specifically catalyze colorless 3,3,5,5-tetramethyl-benzidine(TMB) to form blue oxidized TMB (TMBox). In the presence of nitrite, it further oxidizes TMBox to obtain yellow derivative products attributed to nitrite inducing diazotization reaction in TMBox. Based on this principle, a colorimetric and electrochemical sensing system was developed, and the ultra-sensitive multi-mode detection of nitrite was realized by combining RGB mode of smart phone, UV–Vis spectrum and electrochemical method. Compared with single signal detection, the multi-mode sensing system can realize self-validation to achieve more reliable detection results. What's more, the developed multi-mode sensing could quickly and sensitively detect nitrite in real sample, especially RGB mode of smart phone meeting the equipment limited areas, suggesting a broad application prospects in food safety.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Ting Zhang,Yuting Li,Xiaoming Lv,Shen Jiang,Shuang Jiang,Zhongqi Sun,Mingxu Zhang,Yang Li
The detection of biomolecules utilizing surface-enhanced Raman spectroscopy (SERS) is highly trending in research, but the unlabeled and sensitive detection of saccharides in body fluids is challenging. Here, a novel SERS substrate (AgNS 600 ) is fabricated by physical scratching of smooth silver sheets, which successfully achieves enhanced SERS fingerprinting by capturing glucose molecules through nanoscale grooves on the surface of the substrate to form multi-dimensional “hot spot” regions. The platform proves to be rapid, reliable, and reproducible, with a lower detection limit of 0.5 amol L −1 in deionized water. Further detection of multiple monosaccharides, polysaccharides, and mix samples, which are distinguished with machine learning and heat map, demonstrates the versatility and specificity of the platform. Importantly, real samples are explored and the results show that the platform is able to detect and recognize SERS signals of glucose in the blood, urine, tears, and perspiration, and non-destructive predict diabetes by analyzing the signal intensity of different characteristic peaks. In this work, it is the first non-chemical, un labeled determination of glucose with high sensitivity via SERS, which provides a potential strategy for advancing the clinical development of SERS technology and the early diagnosis of glucose metabolic diseases.
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ENERGY & FUELS
·
2021
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IF 3.605
Bing Li,Yao Chen,Wen Guan,Yanan Wei,Yunlei Zhang,Yongsheng Yan
In this paper, water-in-oil (W/O)-type Pickering high-internal phase emulsions (Pickering HIPEs) were stabilized using the modified SBA-15 with appropriate wettability as the stable particle. After thermal polymerization and subsequent sulfonation, we obtained hierarchical porous nitrogen-doped carbon catalysts (SNCs) with acid–base bifunctional active sites. The as-prepared catalysts have hierarchical porous structures, and acidic and basic catalytic activity centers, which can significantly improve the catalytic activity of the conversion of glucose to 5-hydroxymethylfurfural (HMF). The results showed that the highest HMF yield of 61.3% can be obtained, and the recovered catalyst still has a significant catalytic activity after four consecutive cycles. This work offers a versatile strategy for developing nitrogen-doped carbonaceous catalysts for a wide range of biomass transformation to platform chemicals.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Haitao Wang,Juan He,Lei Ge,Zhi Xu,Wei Zhou,Zongping Shao
Although many metal-based compounds demonstrate the ability to detect glucose, limited metal compounds have the desired high conductivity. Metal nitrides with different states of metal elements (M), such as M 0 and M 2+/3+ , can perform excellent conductivity and catalytic activity. In this work, self-supported non-enzymatic electrochemical sensors supported by carbon paper (CP) were synthesized for monitoring glucose in alkaline solutions. The antiperovskites FeNNi 2 Co and FeNNi 3 as electrocatalysts are first reported in the field of the electrochemical sensor, displaying outstanding catalytic activity and high electrical conductivity. Electrochemical tests suggest that the FeNNi 2 Co/CP and FeNNi 3 /CP electrodes perform outstanding sensing abilities toward rapid glucose determination. In addition, the FeNNi 2 Co with multi-metals can display the trimetallic synergic effect and superior performance than the original material of FeNNi 3 . The sensitivity of FeNNi 2 Co/CP electrode can reach level of 3621 and 1141 μA mM −1 cm −2 in the concentration ranges of 2–2789 μM and 2789–7444 μM, respectively. The repeatability of the glucose concentration in the glucose drink measured by the FeNNi 2 Co/CP electrode can achieve 96.2%.
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INDUSTRIAL CROPS AND PRODUCTS
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2021
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IF 5.645
Ming-Zhao Xiao,Rui Sun,Zhi-Yan Du,Wen-Bin Yang,Zhuohua Sun,Tong-Qi Yuan
Cadmium (Cd) contaminant in soil can pollute crops and poison consumers higher in the food chain. Sorghum ( Sorghum bicolor (L.) Moench) is a promising bioenergy crop that can absorb and accumulate Cd from soil while generate renewable biomass resources for bioethanol or other valuable products, and limit waste production by rational utilization of all components. In this study, a sustainable agricultural strategy was presented and six sorghum cultivars grown under field conditions for the phytoremediation of Cd-contaminated agricultural soil were investigated with the goal of comparing their ability to accumulate Cd and their theoretical bioethanol yields (Cd concentration in the soil was 0.25 and 0.96 ppm). Striking differences were found in the Cd accumulation of these sorghum cultivars, and the result indicated that the Cd accumulation in stalks increased with maturity. The total absorbability of Cd ranged from 19.6 to 148 g/ha, and N6G60 sorghum showed the highest Cd accumulation with a concentration of 9.16 ppm in the stalk on a dry basis. The theoretical yield of bioethanol ranged from 5510 to 7510 L/ha. The overall performance of N6G60 and 15016 sorghums surpassed that of other sorghum cultivars because of their stronger capacities for Cd translocation and higher theoretical yields of bioethanol. Considering the experimental results, as well as the potential ethanol yield and growing situations of sorghums, 15016 sorghum was considered the cultivar showing the most promise for future applications.
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GREEN CHEMISTRY
·
2021
·Vol. 23
·期 5
·2058-2068
·
IF 10.182
Changqu Lin,Chaoqun Chai,Yuanzhang Li,Jiao Chen,Yanyu Lu,Hongli Wu,Lili Zhao,Fei Cao,Kequan Chen,Ping Wei,Pingkai Ouyang
Alkaline earth metal salts are environmentally friendly and economical. They have attracted much attention in the process of biomass conversion, especially for isomerization and dehydration. However, the lack of understanding of the alkaline earth metal-mediated catalytic mechanism prevents the achievement of high HMF yields from glucose or fructose. Herein, we performed experimental and theoretical studies on CaCl2-catalyzed glucose-to-fructose isomerization and fructose-to-HMF dehydration. In CaCl2 solution, the highest fructose yield (33.6%) from glucose can be achieved at 80 °C. Meanwhile, the presence of CaCl2 in fructose-to-HMF dehydration notably improved fructose conversion. A “one-pot” isomerization–dehydration of glucose to prepare HMF was designed and 100% conversion and 52.1% HMF yield were obtained. The CaCl2 solution can be reused for five runs while maintaining catalytic activity without regeneration. Through 1H NMR, 13C NMR, DOSY-NMR and DFT calculations, we concluded that the coordination between the C1/C2 sites of the β-glucopyranose tautomer and CaCl2 promoted the 1,2-intramolecular hydride shift of glucose, thus rapidly converting glucose into fructose. Similarly, Ca2+ can complex with the C2/C6-OH of β-D-fructofuranose and stabilize this tautomer, which easily forms HMF. This is the main reason that CaCl2 can promote the preparation of HMF from fructose.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Xiaolin Yang,Chenggang Long,Yaozong Tan,Qianming Wang
As for the accurate determination of analytes, most of chemical probes suffer from poor selectivity and data fluctuation. Sensor systems via colorimetric and fluorometric modes have caused considerable interests since the two ways are free from employment of special instrumentation and complicated techniques. A new type of cobalt oxyhydroxide (CoOOH) nanosheet has been developed and boron nitride is incorporated. Such nanoplatform can oxidize o-phenylenediamine (OPD) to 2,3-diaminophenazine (OxOPD) with emission change. In the presence of ascorbic acid, CoOOH can be reduced to Co 2+ ions and the generation of OxOPD has been suppressed. Therefore, the fluorescent signal of boron nitride has been recovered and ratiometric determination for ascorbic acid can be realized (detection limit: 1.07 μM; linear range: 0.05–80 μM). In addition, colorless 3,3′,5,5′-tetramethylbenzidine (TMB) can be transformed into oxidized form-TMBox with blue color and the sensitivity can reach as low as 120 nM. Current study will not only provide a typical case of colorimetric and fluorometric sensing for quantitative analysis of ascorbic acid, but also promote a new molecular design concept in practical field.
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FUEL
·
2021
·
IF 6.609
Chihe Sun,Qiang Liao,Ao Xia,Cheng Chen,Qian Fu,Yun Huang,Xun Zhu,Fubao Sun
A multifunctional carbon solid acid with binding and catalytic domains was prepared by co-carbonisation of β-cyclodextrin and polyvinyl chloride followed by sulfonation. The abundant –OH group on the surface of β-cyclodextrin cavity increased the hydrophilicity and dispersibility of catalyst, and the grafting of –Cl group collectively promoted its adsorption performance (45.8% within 6 h). Additionally, the oxidation and substitution of alkyl chains and aliphatic bridges in carbon precursors were responsible to introduce catalytic functional –SO 3 H group. The catalyst directionally facilitated disaccharide hydrolysis with strong bond-breaking effects on α–1, 4 and β–1, 4–glycosidic bonds; the hydrolysis rates ranged 72.7%–84.3%, and the monosaccharide yields ranged 68.7%–78.2%. However, the destruction of α–1, 1–glycosidic bond was weak, and the fracture of α, β–1, 2–glycosidic bond was likely to cause fructose decomposition. The reaction rate constants of glucose production and decomposition increased with the increase of temperature. The apparent activation energy of glucose production was 98.6 kJ/mol, decreased by 25.9% and 10.4% compared with homogeneous dilute acids and conventional carbon solid acids. The binding domains of catalyst not only played important role in enhancing the surface hydrolysis reaction of saccharides, but also decreased the activation energies.
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MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Li Liu,Li Wang,Qisheng Liang,Tao Guo,Feng Guo
Copper oxide-single walled carbon nanotube (CuO-SWCNT) hybrid nanostructure and poly-(diallyldimethylammonium chloride) (PDDA) modified glassy carbon electrode (GCE) for sensitive enzyme-free H 2 O 2 detection has been fabricated via electrostatic interaction strategies. Characterization by XRD, IR and SEM showing that CuO was coated on SWCNT molecular wires, and positively charged PDDA attached to the negatively charged SWCNT, thus CuO-SWCNT-PDDA was constructed. The reduction peak current of H 2 O 2 was significantly increased due to the catalytic property of CuO, which was further enhanced by the synergic effect of SWCNT due to its improvement of electron transfer rate. The calibration curve was linear in the range of 1–1150 µM with a detection limit of 0.39 µM. The electrode coupled with amperometric measurement was successfully applied in H 2 O 2 residue determination in milk and the soaking solutions of chicken paw samples. The results have no remarkable difference compared with the reference UV–Vis method.
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FOOD CHEMISTRY
·
2021
·
IF 7.514
Zhishan Liang,Dongfang Han,Fangjie Han,Zhifang Wu,Xin Zhao,Wencai Fu,Wei Wang,Dongxue Han,Li Niu
Effective evaluation methods for assessing the nutritional quality of foods that eliminate free radicals (i.e., foods that are classified as antioxidants) have long attracted the attention of scientists and the populace. In this case, constructing a corresponding photoelectrochemical sensor that has the advantages of being intuitive, rapid, and capable of accurate assessment for global antioxidant capacity is of profound significance. In this study, a novel g-C 3 N 4 /NiS/TiO 2 photoelectric sensitive platform was constructed and afforded the possibility of a synergistic/antagonistic effect for estimating intrinsic antioxidant ingredients in food. Further investigation revealed that the internal influences of the compound structure, such as the redox potential and type of groups on the molecular benzene ring should be the main internal reasons for antioxidant synergistic behaviors. The photochemical strategy of concern is expected to provide benefits for on-site foods nutrition assays that should become a guide for health care diets.
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FOOD SCIENCE AND BIOTECHNOLOGY
·
2021
·Vol. 30
·期 5
·631-642
·
IF 2.391
Wu Lu,Tan Li Xia,Gong Fen Fang,Xia Yu,Chu Rui Ge,Yang Hua Sheng
This study was designed to evaluate the absorption promoting capacity of Maillard Reaction Products (MRPs) produced during the stir-frying process of Hordei Fructus Germinatus on catechin, ferulic acid, quercetin and kaempferol by the ex vivo rat everted gut sac model, in situ single-pass intestinal perfusion model and the whole animal model. Moreover, verapamil, EDTA and mannitol were used for determining the transport mechanism of catechin, ferulic acid, quercetin and kaempferol. The tight junction (TJ) proteins including zonula occudens-1(ZO-1) and claudin-1 were chosen to investigate the promoting mechanism of MRPs by quantitative real-time PCR (qRT-PCR) and western blot analyses. The results showed that the MRPs produced during the stir-frying process of Hordei Fructus Germinatus could improve the intestinal absorption of catechin, ferulic acid, quercetin and kaempferol. And the absorption-promoting effect of MRPs was related to chelating effect and the reduced expression of claudin-1 and ZO-1. Our results suggested that MRPs could be promising oral absorption promoters, which might be another processing mechanism of Hordei Fructus Germinatus .
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