ACS Applied Electronic Materials
·
2022
·
IF 4.494
Zhang Chen,Xiaotian Sun,Zizheng Wang,Yong Zhu,Chuanxiang Cao,Jiadong Zhou,Yanfeng Gao
Porous carbon was fabricated for broadband microwave absorption application, which was obtained from facile KOH activated carbon microspheres prepared from hydrothermal d-fructose. It is found that micropores (diameter < 2 nm) in the porous carbon played an important role in broadband and high microwave absorption properties. The prepared samples can achieve a wide bandwidth (the widest is 7.9 GHz, from 10.1 to 18 GHz), high dielectric loss (−60.0 dB as the best), and low thickness sensitivity (the bandwidth maintains 70% of the maximum within a film thickness fluctuation of up to 1.02 mm). Our findings offered an invaluable insight into designing and synthesizing highly microwave-absorbing materials through the micro/nanostructure.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
Catalysts
·
2018
·Vol. 8
·期 10
·468
·
IF 3.465
Lu Zheng,Yining Sun,Jing Wang,He Huang,Xin Geng,Yi Tong,Zhi Wang
In this present study, we proposed a smart biomineralization method for creating hybrid organic–inorganic nanoflowers using a Co2+-dependent enzyme (D-psicose 3-epimerase; DPEase) as the organic component and cobalt phosphate as the inorganic component. The prepared nanoflowers have many separated petals that have a nanometer size. Under optimum conditions (60 °C and pH of 8.5), the nanoflower can display its maximum activity (36.2 U/mg), which is about 7.2-fold higher than free DPEase. Furthermore, the immobilized DPEase presents enhanced pH and thermal stabilities. The DPEase-nanoflower maintained about 90% of its activity after six reaction cycles, highlighting its excellent reusability.Keywords:nanoflower;immobilization;metal-dependent enzyme;D-psicose;DPEase
研究领域:
生物化学
·
酶工程
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DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2013
·Vol. 31
·期 8
·1095-1101
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IF 0.917
Hongyan Bai,Qian Sun,Haiyu Tian,Junhong Qian,Lingyi Zhang,Weibing Zhang
A single boronic acid-based fluorescent probe (compound CSP) for saccharides was designed and synthesized. The probe, with an α , β -unsaturated ketone conjugated into the coumarin fluorophore, was synthesized by 4 steps from the commercial material 4-diethylamino salicylaldehyde. The electron push-pull effect is enhanced with the N , N -diethyl amino as the electron donor and the carbonyl as the electron acceptor. Both the absorption (463 nm) and emission (616 nm) maxima of CSP are in the visible wavelength region with a Stokes shift of about 150 nm, which ensures CSP a potential probe for biological application. Under near physiological conditions, significant fluorescence enhancement of CSP was observed upon the addition of some saccharides, namely, D -sorbitol, D -fructose, D -glucose, D -mannose and D -galactose. The probe showed relatively high sensitivity towards D -fructose and D -sorbitol, and their detection limits were 0.05 mmol/L and 0.1 mmol/L, respectively.
研究领域:
分析化学
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生物化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2018
·
IF 4.513
Kemeng Shi,Christian Marcus Pedersen,Zhaohui Guo,Yanqiu Li,Hongyan Zheng,Yan Qiao,Tuoping Hu,Yingxiong Wang
The tautomer distributions of d ‑fructose, a popular model compound for biorefinery , in various lower alcohols and DMSO‑ d 6 (ROHs/DMSO‑ d 6 ) mixtures at 298 K were investigated by quantitative 13 C NMR. The tautomer distributions of d ‑fructose in ethanol/DMSO‑ d 6 and methanol/DMSO‑ d 6 with different volume ratios of alcohols to DMSO‑ d 6 were also examined. For these normal alcohols (methanol, ethanol, n ‑propanol and n ‑butanol)/DMSO‑ d 6 , the tautomer distribution of d ‑fructose in methanol/DMSO‑ d 6 exhibited the shortest equilibration time (46 h) and the lowest concentration of β‑furanose (39.0%) at equilibrium. The fraction of fructofuranose (α‑furanose and β‑furanose) at equilibrium and time needed to reach equilibrium in branched chain alcohols/DMSO‑ d 6 obey the following order: 2‑propanol/DMSO‑ d 6 (62.2%, 320 h) > tert ‑butanol/DMSO‑ d 6 (61.6%, 307 h) > 2‑butanol/DMSO‑ d 6 (60.6%, 216 h) > isobutanol/DMSO‑ d 6 (57.8%, 134 h). For the diols/DMSO‑ d 6 , the time for the tautomer distribution of d ‑fructose to reach the equilibrium was found to be: 1,4‑butanediol/DMSO‑ d 6 (113 h) > 1,2‑propanediol/DMSO‑ d 6 (38 h) > ethylene glycol/DMSO‑ d 6 (36 h). For ethanol/DMSO‑ d 6 and methanol/DMSO‑ d 6 with respectively different volume ratios, the experimental results showed that the high concentration of ethanol or methanol increases the conversion rate of tautomers.
研究领域:
生物化学
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分析化学
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产品关联
DOI
高影响因子
Micro & Nano Letters
·
2021
·Vol. 17
·期 1
·16-24
·
IF 1.102
Zhenpei Pang,Guidong Lin,Yuheng Wu,Hongmei Li,Yunhao Sun,Hongjun Zhou,Shenggen He
The green synthesis of nano-silver (NS) has gained increasing attention owing to its cost-effectiveness and environmental friendliness. Herein, a novel one-step green preparation method of stable NS aqueous solution using Tollens reagent as the silver ion source, D-fructose as the reduction agent, and polyvinyl pyrrolidone as the stabilizing and capping agent is reported. The prepared NS solution had a pH value of 7.10, with approximately spherical NS particles in the range of 13.95–87.36 nm. The resulting NS solution was stable under normal temperature, boiling water bath, and acidic environment. The NS solution had a remarkable absorption peak at 410 nm in its ultraviolet–visible spectrum. The dynamic light scattering/Zeta analysis showed the average particle size of the NS aqueous solution was 183.5 nm, polymer dispersion index was 0.282, and the zeta potential of the green synthesized NS was –18.0 mV. Moreover, the NS solution exerted a strong inhibitory effect on the growth of the bacteria isolated from the vase water of cut carnation ‘Prince’ flowers. These findings indicate that the obtained NS solution is potentially a practical and effective antibacterial agent for preserving cut carnations and other cut flowers.
研究领域:
植物学
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材料科学
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微生物学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Ting Huang,Huang-xian Zhang,Xiao-hua Zhang,Da-yong Peng,Xu-liang Nie,Jing Chen,Wan-ming Xiong
A kind of functionalized diallylimidazole ionic liquids (CnDAIMF) was synthesized and applied in the dehydration of D-fructose to produce 5-HMF under the microwave radiation. The results showed that X-ray, 1 H NMR and FT-IR confirmed the production. The target ILs existed in a highly centrally symmetric, and crystalline state at room temperature, with a good thermal stability up to 300 °C (HTD ≥ 340 °C). In the experiments of conversion D-fructose to 5-HMF, 5-HMF could be obtained via the catalysis of diallylimidazole IL whether in water or DMSO. The catalytic performance of these ILs was not much different from that of solid acid (like camphor sulfonic acid or solid carbon sulfonic acid), and which was higher than that of the monoimidazole hexafluorophosphate or imidazole class bromine salt, but there were no obvious changes can be found with the variation of carbon chain length between imidazole rings in diallylimidazole IL. The effects of temperature and solvent on the reaction were more significant. The optimized yield of 5-HMF was 52.59% at 185 °C in a water-C 2 DAIMF solvent (t = 10 min), while 73.71% at 195 °C in DMSO-C 2 DAIMF solvent. Furthermore, six CnDAIMF have a considerable effect on the conversion in water and 5-HMF yield of about 50% could be obtained, which is satisfactory compared with other similar processes, especially in the microwave system of aqueous solution. Therefore, this process may be benefit for many researches and applications related to functionalized ionic liquid research and biomass conversion applications.
研究领域:
化学工程
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生物质能
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绿色化学
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产品关联
DOI
高影响因子
ChemSusChem
·
2021
·Vol. 14
·期 23
·5311-5319
·
IF 8.928
Jianwang Xu,Xinge Miao,Lei Liu,Yantao Wang,Weiran Yang
Graphical Transfer hydrogenation : 5-Methylfurfural (5-MF), a promising C 6 platform molecule, is directly produced from biomass-derived carbohydrates by iodide-mediated transfer hydrogenation. Under the optimized conditions, 30–50 % of 5-MF is yielded from low-cost sugars and starch with 5-MF productivity as high as 103 mmol g cat −1 h −1 . The catalytic system is simple, robust, recyclable, and preferable to other approaches for the production of 5-MF. Herein, a robust catalytic system was developed for the green synthesis of 5-methylfurfural (5-MF) by iodide-mediated transfer hydrogenation. Around 50 % of 5-MF was yielded from d -fructose within 7.5 min using NaI as the catalyst and formic acid as both the hydrogen source and co-catalyst. The catalytic system was used for six consecutive cycles without any decrease in the yield. Various starch and raw biomass could be used as promising starting materials for 5-MF synthesis with moderate yields, and the productivity of 5-MF from corn starch reached 103 mmol g cat −1 h −1 , which is comparable with the best result from l -rhamnose. Moreover, the co-production of 5-MF and furfural from raw biomass makes this methodology more competitive than other routes.
研究领域:
化学工程
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可再生资源
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2021
·
IF 5.279
Zhaohui Guo,Christian M. Pedersen,Pengfei Wang,Minjun Ma,Yingqing Zhao,Yan Qiao,Yingxiong Wang
The isomerization of d-glucose to d-fructose plays a key role in the biochemical and chemical conversion of biomass, and it is therefore desirable to develop and improve catalysts for this reaction. In this study, the environmentally friendly polymer poly(amidoamine) (PAMAM) dendrimer’s properties as catalysts for this isomerization are investigated. The experimental results showed that the PAMAM dendrimers, which have basic terminal groups, can effectively promote the d-glucose isomerization reaction. Under the optimized reaction conditions, d-fructose was generated with a 20% maximum yield and above 90% selectivity. 13C and 2H isotope experiments by NMR were carried out to explore the reaction mechanism. When the reaction was performed in D2O, the C1 signal of d-fructose changed to a triplet, which confirmed that the C1 carbon binds to a deuterium atom, i.e., isotopic exchange. It was also found that the deuterium atom at the C2 position of d-glucose-2-d1 cannot transfer to d-fructose. These data indicate that PAMAM dendrimers catalyze d-glucose isomerization through a mechanism, which includes deprotonation, formation of ene-diol intermediate, and proton exchange with the solvent.
研究领域:
生物化学
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绿色化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2019
·Vol. 43
·期 23
·8950-8957
·
IF 3.069
Xi Wang,Xue-Chen Xu,Mian Yang,Peng Jiang,Jie Zhao,Feng-Lei Jiang,Yi Liu
New multicolor carbon dots made from D-fructose and NH4HCO3, denoted as F-CDs, have been synthesized via a time-saving and energy-saving microwave-assisted method. By just adjusting the concentration, the optimal emission wavelength of the F-CDs could be tuned from 404 nm to 583 nm. Furthermore, the sp2 carbon core and abundant functional groups provided the foundation for concentration-dependent photoluminescence properties. The relationship between the aggregation process and the concentration-induced photoluminescence mechanism is fully discussed. The maintenance of the F-CDs’ PL intensity with increasing concentration occurred by a mechanism similar to the crosslinked enhanced emission (CEE) effect. Finally, the highly stable and biocompatible multicolor F-CDs were successfully applied in fluorescent ink and multicolor bioimaging.
研究领域:
材料科学
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生物医学工程
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Heliyon
·
2023
·Vol. 9
·期 9
·e19889
·
IF 4
Zhou Chen,Yimei Shen,Run Wang,Siting Li,Yingmin Jia
A novel gene ( BbFFase9 ), with an ORF of 1557 bp that encodes β-d-fructofuranosidase from Bifidobacteriaceae bacterium , was cloned and expressed in Escherichia coli . The recombinant protein (BbFFase9) was successfully purified and showed a single band with a molecular mass of 66.2 kDa. This was confirmed as a β-d-fructofuranosidase and exhibited a high specific activity of 209.2 U/mg. Although BbFFase9 was a soluble protein, it exhibited excellent tolerance to proteases such as pepsin, trypsin, acidic protease, neutral protease and Flavourzyme®, indicating its potential applicability in different fields. BbFFase9 exhibited typical invertase activity, and highly catalyzed the hydrolysis of the α1↔2β glycosidic linkage in molecules containing fructosyl moieties but with no detectable fructosyltransferase activity. It was optimally active at pH 6.5 and 50 °C and stable between pH 6.0 and 9.0 at a temperature of up to 45 °C for 30 min BbFFase9 could also effectively hydrolyze galacto-oligosaccharides, which are a flatulence factor in soybean meal, thus releasing new types of product such as melibiose and mannotriose, or degrading them into invert sugars, the sweeter fructose and glucose. This study is the first to report the application of this type of β-d-fructofuranosidase.
研究领域:
生物化学
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食品科学
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Yu Peng,Luyao Jiang,Junhua Di,Cuiluan Ma,Qi Li,Yucai He
Biobased 2,5-bis(hydroxymethyl)furan is a versatile building block for the production of drugs, polymers, crown ethers, bioactive compounds, and value-added intermediates. To explore a more efficient route to synthesize 2,5-bis(hydroxymethyl)furan, a tandem transformation by quick dehydration with a deep eutectic solvent betaine:benzenesulfonic acid (Bet:BSA) and mild bioreduction with recombinant Escherichia coli (E. coli) DCF was developed for converting d-fructose into 2,5-bis(hydroxymethyl)furan. The 5-hydroxymethylfurfural yield reached 62.3 ± 1.6% (based on d-fructose) in Bet:BSA at 120 °C after a short time (2 min). d-Fructose-valorized 5-hydroxymethylfurfural was biologically transformed to 2,5-bis(hydroxymethyl)furan by newly constructed recombinant E. coli DCF containing reductase and formate dehydrogenase at 40 °C and pH 7.5 after 48 h, with a yield of 99.6 ± 0.1% (based on 5-hydroxymethylfurfural) in Bet:BSA-water containing the cosubstrate HCOONa (5-HMF-to-HCOONa molar ratio, 1:2.5). Meanwhile, 150 mM commercial 5-hydroxymethylfurfural was transformed into 2,5-bis(hydroxymethyl)furan in a yield of 94.4 ± 0.9%. An efficient hybrid process was constructed to valorize d-fructose to 2,5-bis(hydroxymethyl)furan in Bet:BSA-water, which has good industrial application potential.
研究领域:
生物化学
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工业生物技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOILS AND SEDIMENTS
·
2022
·Vol. 22
·期 8
·2129-2145
·
IF 3.536
Nkoh Jackson Nkoh,He Xian,Lu Hai-long,Li Ke-wei,Shi Ren-yong,Li Jiu-yu,Xu Ren-kou
Purpose This study aims to evaluate the effects of chitosan and D-fructose 1,6-bisphosphate (F16BP) trisodium salt on the acidity of selected Ultisols (Ultisol-QY1, Ultisol-QY2, Ultisol-LX, and Ultisol-YT) and their resistance to soil acidification. Materials and methods The effect of adsorbed chitosan and F16BP on soil acidity was evaluated by interacting different concentrations of the organic substrates with 4.0 g soil under different agitation times (2 to 264 h, 200 rpm, 25 °C). Also, the soils were amended with the organic substrate and incubated for 14 days to determine their effects on soil physicochemical properties. Afterwards, the soil solid phases from the adsorption studies and incubated soil were acidified with different concentrations of nitric acid to simulate soil acidification and activate soil aluminum (Al). Results and discussion The adsorption interactions of chitosan and F16BP with Ultisols demonstrated different potentials in their ability to displace mineral-bound hydroxyl groups and ameliorate soil acidity. The R-PO 4 3− group of F16BP was more effective in displacing the hydroxyl groups through a ligand exchange mechanism and thus showed greater ameliorating effect on soil acidity than chitosan. Compared to lime and F16BP, chitosan-treated soils exhibited the least decrease in pH during soil acidification due to the significant improvement in soil pH buffering capacity (pHBC). Specifically, when amended with chitosan, the pHBC of Ultisol-QY1, Ultisol-QY2, Ultisol-LX, and Ultisol-YT was increased by 262.2%, 88.9%, 337.7%, and 320.6% as opposed to 22.1%, 18.4%, 27.4%, and 83.0% for these Ultisols by F16BP, respectively. Thus, F16BP is a better material to improve soil pH, while chitosan is a better option to improve soil pHBC, inhibit soil acidification, and retard the activation of phytotoxic Al 3+ . By the nature of their functional groups, we deduced that F16BP ameliorated soil acidity by displacing the hydroxyl groups on soils due to adsorption of R-PO 4 3− group through ligand exchange mechanism, while chitosan directly improved pHBC by providing abundant R-NH 2 groups to accommodate excess exogenous H + . Conclusions Chitosan is a promising soil amendment material for use in the management of acidic soils due to its high N content and potential to inhibit soil acidification. Given the readily available raw materials and ease of producing chitosan, long-term incubation studies should be carried out to assess the effect of chitosan on soil pH variations, carbon, and N mineralization.
研究领域:
土壤科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）