FOOD SCIENCE AND TECHNOLOGY RESEARCH
·
2017
·
IF 0.459
Liangzhi Li,Lina Gu,Xin Ju,Cuiying Hu,Jiaolong Fu,Hongying Cheng,Pei Kang
This study investigated the production of erythritol by Trichosporonoides oedocephalis in response to the varying osmotic pressure. Osmotic pressure was exerted by adding NaCl or KCl into the fermentation broth. It was demonstrated that appropriate raise in osmotic pressure enhanced erythritol production, wherein 5 g/L KCl addition increased erythritol yield by 44.21% compared to the control. The reason for the significant increase in the erythritol production showed that the 5 g/L KCl addition accelerated the glucose utilization in the late period of fermentation time. It was also revealed that 5 g/L KCl increased the activity of erythrose reductase (ER) in the same fermentation period. In bioreactor, the erythritol yield with initial 5 g/L KCl addition was up to 50.54 g/L, which was 47.69% higher than the control (34.22 g/L). The study provided a novel fermentation regulation, that is, economical addition of KCl made more effective production of erythritol when using T. oedocephalis.
研究领域:
微生物学
·
发酵工程
·
生物技术
✓ 已验证
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2013
·
IF 2.379
Xiang Liu,Yonghong Hu,Wenge Yang,Yan Liu,Mengmeng Liang
Data on corresponding solid–liquid equilibrium of erythritol in methanol, ethanol and methanol + ethanol was measured with temperature range from 283.15 K to 333.15 K under atmospheric pressure by employing the gravimetric method. The experimental results indicated that the solubility of erythritol in the solvents increases with increasing both temperature and mass fraction of organic solvents. The experimental data were well-correlated with the modified Apelblat equation, the λh equation and the van’t Hoff equation. In addition, the calculated solubilities showed good agreement with the experimental results. It was found that the modified Apelblat equation could obtain the better correlation results than the other two models. The standard enthalpy, standard entropy, and Gibbs free energy change of solution of erythritol were calculated from the solubility data by using the modified Apelblat model and the van’t Hoff equation. What's more, the experimental data and model parameters would be useful for optimizing the process of purification of erythritol in industry.
研究领域:
食品科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 3.7
Yugang Shu,Jiaguang Zheng,Chengguo Yan,Ao Xia,Meiling Lv,Zhenxuan Ma,Zhendong Yao
NaBH 4 was widely regarded as a low-cost hydrogen storage material due to its high-mass hydrogen capacity of approximately 10.8% (mass) and high volumetric hydrogen capacity of around 115 g·L –1 . However, it exhibits strong stability and requires temperatures above 500 °C for hydrogen release in practical applications. In this study, two polyhydric alcohols, xylitol and erythritol (XE), were prepared as a binary eutectic sugar alcohol through a grinding-melting method. This binary eutectic sugar alcohol was used as a proton-hydrogen carrier to destabilize NaBH 4 . The 19NaBH 4 -16XE composite material prepared by ball milling could start releasing hydrogen at 57.5 °C, and the total hydrogen release can reach over 88.8% (4.45% (mass)) of the theoretical capacity. When the 19NaBH 4 -16XE composite was pressed into solid blocks, the volumetric hydrogen capacity of the block-shaped composite could reach 67.2 g·L –1 . By controlling the temperature, the hydrogen desorption capacity of the NaBH 4 -XE composite material was controllable, which has great potential for achieving solid-state hydrogen production from NaBH 4 .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
·
2024
·
IF 6.4
Chongyang Wei,Yi Li,Jinliang Song,Jinxing Cheng,Zhongfeng Tang
The application of erythritol to medium-temperature latent heat energy storage systems is limited by its low thermal conductivity and large supercooling. Three types of graphite foams (GFs) with different thermal conductivities were used as the porous skeleton for encapsulating erythritol via vacuum impregnation, and the erythritol/GF composites were investigated using different methods to solve the aforementioned problems. The GF pores were effectively filled with erythritol via vacuum impregnation, and the filling rate of erythritol reached more than 90%. The thermal conductivity of the erythritol/GF composites was 73.80, 35.05, and 13.30 W/m·K. The thermal conductivity of the erythritol/GFs was improved by 26–158 times over that of pure erythritol. The subcooling degree of the erythritol/GF composites was reduced from 64.1 °C to 59.4 °C, facilitating the release of latent heat. The erythritol/GF composites had remarkably boosted thermal stability compared with that of pure erythritol. The developed erythritol/GF phase-change composite material exhibits excellent heat transfer and storage properties, and it has broad prospects in the field of phase-change heat storage at intermediate temperatures.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2012
·
IF 1.58
Yonghong Hu,Xinmin Jiang,Wenge Yang,Zhaoguo Chen,Xiaoqin Meng,Fei Shen
In this study the solubility of erythritol in methanol + water, ethanol + water, and 1-propanol + water was experimentally measured over the temperature range of (278.15 to 333.15) K at around 5 K intervals by employing an analytical stirred-flask method. Experimental result shows that the solubility of erythritol in the binary mixtures increases with the increase of both temperature and mole fraction of water. Results of these measurements were well correlated with the modified Apelblat equation and the Buchwski–Ksiazaczak λh equation. It was found that the modified Apelblat equation could give the better correlation results than the Buchwski–Ksiazaczak λh equation. In addition, the calculated results show good agreement with the experimental solubilities. Therefore, the experimental data and model parameters would be useful for optimizing the process of purification of erythritol in industry.
研究领域:
食品科学
·
化学工程
✓ 已验证
DOI
高影响因子
CARBOHYDRATE RESEARCH
·
2012
·
IF 2.332
Junhui Xue,Xiaohui Hua,Weihong Li,Limin Yang,Yizhuang Xu,Guozhong Zhao,Gaohui Zhang,Chunping Li,Kexin Liu,Jia’er Chen,Jinguang Wu
Three novel lanthanum chloride–erythritol complexes (LaCl 3 ·C 4 H 10 O 4 ·5H 2 O (LaE(I)), LaCl 3 ·C 4 H 10 O 4 ·3H 2 O (LaE(II)), and LaCl 3 ·1.5C 4 H 10 O 4 (LaE(III)) were synthesized and characterized by single crystal X-ray diffraction, FTIR, far-IR, THz, and Raman spectroscopy. The coordination number of La 3+ is nine. LaE(I) and LaE(II) have similar coordination spheres, but their hydrogen bond networks are different. Erythritol exhibits two coordination modes: two bidentate ligands and tridentate ligands in LaE(III). Chloride ions and water coordinate with La 3+ or participate in the hydrogen-bond networks in the three complexes. Crystal structures, FTIR, FIR, THz, and Raman spectra provide detailed information on the structures and coordination of hydroxyl groups to metal ions in the metal–carbohydrate complexes.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
·
2019
·
IF 3.488
Biao Feng,Li-Wu Fan,Yi Zeng,Jing-Yu Ding,Xue-Feng Shao
Molecular dynamics (MD) simulations were performed to give insights into the effects of hydrogen bonds (HBs) on the melting process and heat conduction of erythritol as a promising latent heat storage material. First, among four force fields (GAFF, GROMOS, OPLS and CHARMM), the applicability of GROMOS force field was verified by comparing the predicted density and heat capacity of erythritol at various temperatures of interest with the measured values. The microscopic melting process of erythritol was simulated using the interface/NPT method, leading to a predicted melting point of ~394 K that agrees well with the measured value (~392 K). It was demonstrated that the variation of HBs energy associated with changes of molecular structure is the primary contribution to the latent heat. Upon melting, the strong inter-molecular HBs in solid erythritol break off and form weaker intra- and inter-molecular HBs in the liquid phase. In addition, non-equilibrium MD simulations were performed to study the microscopic heat conduction in erythritol molecules and to examine the dependence of the van der Waals (vdW) and Coulomb heat currents on the interatomic distance. It was revealed that the heat transfer capability of HB interactions is better than those of the Coulomb or vdW interactions. In the solid phase, the amount of heat transfer through HBs becomes greater with increasing the number of HBs. The results shed light on a promising approach to improving the latent heat storage capacity and thermal conductivity of erythritol (and other sugar alcohols) by manipulating the number and strength of HBs.
研究领域:
材料科学
·
分子动力学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2017
·
IF 4.784
Yi Wang,Shuang Li,Ting Zhang,Deyi Zhang,Hui Ji
The main aim of this paper is to mitigate the supercooling and improve the heat release performance of erythritol (ET) as phase change material for thermal energy storage using the method of encapsulation and doping additives . The capsules containing ET, thickening and nucleating agent were prepared and various characterization techniques were employed to investigate the structure and thermo-physical properties of the composite, especially the supercooling inhibition and exothermicity improvement. Experimental results reveal that capsulation and adding thickening and nucleating agents have positive influence on the supercooling elimination, heat discharging ability improvement and thermal stability enhancement. The optimal capsules, with the maximal ET mass percentage of 59.2%, melt at 121.2 °C and freeze at 106.4 °C with the latent heat of 213.3 J/g and 206.9 J/g, respectively. Due to the improved crystallization kinetics , the degree of supercooling decreased by 83.6% as well as the heat release ratio increased by 52.2% compared to those of pristine ET. The as-prepared capsules have obvious core-shell structure, good compatibility between the shell and core materials. The thermal conductivity is 0.84 W/m K, increased by 29.2% than that of pristine ET. The results of accelerated thermal cycling test indicate that the supercooling, heat release ability and thermal reliability of encapsulated ET changed imperceptibly. In total, the technology of capsulation and adding thickening and nucleating agents can be used to suppress the supercooling and improve the thermal behavior of ET.
研究领域:
能源存储
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2024
·Vol. 16
·期 11
·1686-1696
·
IF 2.7
Xinyue Zhang,Si Wu,Tao Feng,Yuanhao Yan,Shijing Wu,Yinyu Chen,Yu Wang,Qingmiao Wang,Ning Hu,Li Wang
Based on the versatile properties of bio-derived materials, non-enzymatic assays in combination with electronic devices have attracted increasing interest. Here, we report a novel enzyme-free visualization approach for the detection of erythritol, which is a zero-calorie natural sweetener and serves as an ideal sucrose substitute for diabetics or overweight people who need sugar control. The recognition element of the electrochemical biosensor was constructed by catechol modification on a chitosan-based hydrogel film. The signal transduction was achieved by the competitive binding assay of sweeteners. The results show that 2-fluorophenylboronic acid (FPBA) can form a cyclic boronate ester with the ortho-hydroxyls of both reduced catechol and oxidized quinone, impeding the electron transfer and leading to redox signal attenuation. The addition of sweeteners caused a competitive reaction resulting in bonding between the 1,2-diols and FPBA moieties, and in the recovery of the redox signals. Importantly, the pattern of redox signal changes of catechol can be detected optically, as the oxidized quinone state is darker in color than the reduced catechol state. Using a simple cell phone imaging application, we demonstrate that erythritol can be distinguished from other sweeteners in real samples using the oxidized catechol-Chit0/agarose hydrogel film. Thus, we envision that this method could allow diabetics and people who need to control their sugar intake to detect whether the product contains only erythritol in the field or at home. In addition, this work further illustrates the potential of bio-derived materials for performing redox-based functions and enzyme-free visualization assays.
研究领域:
生物化学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Jia Mi,Yingchun Li,Wensheng Wang,Zhimao Li,Tong Liu,Guang Nie,Zheyu Zhang
Bio-based copolyesters have garnered significant attention in the domains of packaging and agriculture due to their exceptional degradability and mechanical properties. Building upon existing research, this study further modifies bio-based copolyesters with the objective of enhancing their comprehensive mechanical properties and broadening their application scope. High-performance aromatic copolyesters were synthesized through a two-step esterification and polycondensation process, utilizing terephthalic acid, adipic acid, 1,4-butanediol, and erythritol as raw materials. The structures of the synthesized copolyesters were characterized using FTIR, 1 H NMR, 13 C NMR. Compared to PBAT, the tensile strength and elongation at break of the copolyesters demonstrated improvements of 22.14 % and 80.14 %, respectively. Moreover, the tear strength and puncture resistance of the copolyesters were enhanced by 25.10 % and 54.13 %, respectively. TG indicated that the copolyesters exhibit high thermal stability. Notably, these copolyesters maintained good degradability after 35 days at ambient temperature. In conclusion, the enhancement of both mechanical and degradation properties of copolyesters was imperative for the advancement and promotion of degradable foams, films, and elastomers.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2024
·
IF 3.6
Yingbiao Yuan,Jun Li,Piao Wang,Liyuan Zhang,Haidong Ju,Renjie Chen
Erythritol-based nanocapsules with a phase-change temperature of 120 °C are successfully prepared under very mild conditions. The nanocapsules are produced via multiple crystallization precipitations from a saturated erythritol aqueous solution, followed by SiO 2 coating using a sol–gel method. Their nanostructure and elemental composition are characterized using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The latent heat of the nanocapsules is measured with a differential scanning calorimeter. The erythritol nanocapsules, with an average size of ≈220 nm, exhibit a melting enthalpy of 192.7 J g −1 . Notably, the supercooling degree of the nanocapsules is reduced by ≈30.0 °C compared to pure erythritol. After 200 thermal cycles, the heat storage performance of the nanocapsules shows only a 7.6% decrease. A latent heat functional thermal fluid, suitable for high-temperature heat transfer, is prepared by dispersing the nanocapsules in silicone oil. The thermal conductivity and specific heat capacity of this fluid increase by 20.5% and 283.3%, respectively, compared to pure silicone oil. These findings demonstrate that erythritol nanocapsules significantly enhance the thermal properties of high-temperature heat transfer fluids, highlighting their potential for high-temperature heat storage and transfer application.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2015
·Vol. 73
·期 1
·97-112
·
IF 1.438
Teng Lijing,Nie Wangyan,Zhou Yifeng,Chen Pengpeng
In this paper, a series of star-shaped poly( l -lactide)s (s-PLLA) were synthesized via ring-opening polymerization of l -lactide (LLA) using erythritol as initiator. The structure and properties of s-PLLA were characterized by 1 H NMR, GPC and DSC. Then taking rifampicin (RIF) as the model drug, RIF-loaded s-PLLA microspheres were prepared using an oil-in-water emulsion solvent evaporation method. SEM and size analysis indicated that s-PLLA with high monomer/initiator molar ratios (s-PLLA98 and s-PLLA99) could form regular microspheres with smooth surface and have narrow size distributions, which hold the drugs well. The XRD spectra of the RIF-loaded microspheres demonstrated that s-PLLA and RIF were both in their amorphous state after the encapsulation process, which might be caused by the impediment effect of each other. The in vitro release profiles of the RIF-loaded microspheres showed that the s-PLLA99 microspheres were able to sustain the release of RIF for a considerable period of time (70–80 % within 180 h) and the release profiles of RIF from s-PLLA microspheres followed the Baker–Lonsdale model equation. Therefore, these biodegradable and biocompatible s-PLLA microspheres may find practical applications as drug delivery carriers.
研究领域:
生物材料学
·
药剂学
·
高分子化学
✓ 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）