ANALYTICAL CHEMISTRY
·
2016
·
IF 5.886
Yongqiang Dong,Jianhua Cai,Qingqing Fang,Xu You,Yuwu Chi
Nitrogen and sulfur codoped carbon-based dots (N,S-CDs) with strong blue light emission are encapsulated into red light-emitting europium metal–organic frameworks (Eu-MOFs) to form two color light-emitting nanohybrids (Eu-MOFs/N,S-CDs). In organic solvents, the encapsulated N,S-CDs are aggregated and confined in the cavities of the Eu-MOFs, exhibiting only a very weak photoluminescence (PL) signal. Therefore, the nanohybrids show red light emission of the Eu-MOFs. Contrarily, when the Eu-MOFs/N,S-CDs are dispersed in water, the encapsulated N,S-CDs are released into solution while the red light emission of the Eu-MOFs is quenched due to the effect of O–H oscillators. The nanohybrids are used as the probe for the water content in organic solvents. Take ethanol as an example; as the water content is increased from 0.2 to 30%, the nanoprobe provides distinguishable PL color change. The ratio of light intensity at 420 nm to that at 623 nm (I420/I623) increases linearly with increasing water content in the range from 0.05 to 4% with a low detection limit of 0.03%.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Foods
·
2024
·Vol. 13
·期 20
·3216
·
IF 4.7
Tao Huang,Dan Ouyang,Shangyuan Sang,Caiming Li,Xiaosan Wang,Xiao Wang,Jiali Xing,Xiaohu Luo
The grinding process is one of the key factors affecting the quality of glutinous rice flour (GRF). As an emerging grinding method, semidry grinding aims to solve the problems of the high yield of wastewater in traditional wet grinding and the high content of damaged starch in dry grinding, in which the water content has a great influence on the quality of GRF. However, semidry grinding has not yet been formally put into production due to limitations such as the long time required to adjust the water content of rice grains. Therefore, this work was carried out to shorten the soaking time of glutinous rice (GR) by hot air pretreatment, and to conduct a systematic and in-depth study of the effect of water content on the quality of GRF, including water distribution, water hydration properties, thermal properties, rheological properties, and microstructure. The results showed that the GRF with higher water content had lower water solubility and higher enthalpy of pasting, which were due to the low content of damaged starch and the high degree of crystallization. The particle size of the GRF became smaller as the interaction between water and starch was enhanced and the GR was softened. In addition, the viscosity and elasticity of the GRF were also improved with an increase in water content. This work provides theoretical guidance for the improvement of semidry grinding to a certain extent.
研究领域:
食品科学
·
加工工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yanqing Xu,Zhaojiang Yin,Qian Long,Haotian Xie,Xinying Yan,Fusheng Liao,Hanfeng Cui,Hao Fan
This study reports the design and synthesis of a fluorescent probe TPA-ACL based on the triphenylamine (TPA) structure for the dual detection of hydrogen sulfide (H₂S) and water content. In the presence of H₂S, TPA-ACL exhibits a pronounced “turn-on” fluorescence response, demonstrating excellent selectivity and high sensitivity with a detection limit (LOD) of 2.02 nM. Furthermore, TPA-ACL enables real-time detection of H₂S using test strips, allowing for visual monitoring of H₂S gas generated during food spoilage, indicated by a color change from pale yellow to deep yellow. The probe was also successfully applied for the quantitative analysis of trace water content in food samples, with a detection limit (LOD) of 70.7 ppm (0.0071 vol%) in tetrahydrofuran (THF). This study provides a sensitive, efficient, and practical tool for detecting H 2 S and water content, demonstrating significant potential for applications in food safety monitoring.
研究领域:
分析化学
·
食品科学
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Waste and Biomass Valorization
·
2016
·Vol. 8
·期 1
·95-102
·
IF 0.915
Zhang Peng,Chang Zhidong,Wang Dongyu,Blamo Benjamin John,Li Wenjun
Biodiesel is an environmentally friendly fuel which can be economically produced by the use of waste culinary oil as raw material and NaOH as catalyst. However, the moisture in waste culinary oil or solid NaOH can affect the distribution of final products. In this paper, the water content of solid NaOH and waste culinary oil were determined to be 4.7 and 1.0 % respectively. A simulated transesterification system of methyl butyrate and n-butanol was catalyzed by anhydrous NaOH which was sintered at 800 °C for 2 h. The moistures in reaction system were imitated by contrived addition of water. Experimental results show that when the water content is 0.25 %, the yield of transesterification achieves the highest, simultaneously, saponification remains at the minimum level. The soybean oil and methanol were investigated as exemplary biodiesel system. The results show that when the water content is 1 %, the yield of biodiesel reaches 98.81 %, which is the highest.
研究领域:
化学工程
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2025
·
IF 6.2
Xiaoyu Zhang,Shun Zhou,Jin Zhang,Jiuyi Liu,Xiaofeng Wang,Weijian Chen,Yanyan Li,Mengdie Cai,Lisheng Guo,Song Sun
Heated tobacco products (HTPs) have gradually become an important development direction of tobacco products because of their significant advantages in reducing the release of harmful components. To reveal the thermal degradation characteristics of the heated tobacco products is of great significance for the development of novel heated tobacco products. The effects of heating method on pyrolysis and smoke release of the tobacco granules were studied with in situ diffuse reflection Fourier transform infrared spectroscopy (DRIFTS) technology and infrared thermal imaging technology. The results showed that: 1）The different heating methods of tobacco granules had a great influence on the temperature field distribution. Among them, the bottom heating method had a more uniform temperature distribution and a higher average temperature than the central heating method. 2) Different heating methods directly led to the difference in the release of various chemical components. The DRIFTS spectra indicated that the release characteristic of gaseous products with different heating methods were different, while the release temperature ranges were slightly different due to the differences of chemical components. The bottom heating method was more conducive to smoke release. 3) The moisture content of tobacco granules also directly affected the pyrolysis process and the smoke release characteristics. Either too high or too low moisture content was not conducive to the pyrolysis process and smoke release. The mathematical model of the thermal degradation characteristics was established to predict the quality of tobacco granules and to provide theoretical guidance for the product development of heating tobacco.
研究领域:
烟草科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Jishuang Deng,Aiym Bolgazy,Xinxin Wang,Meng Zhang,Yang Yang,Hao Jiang
To investigate the effect and mechanism of water on the structure, physicochemical properties, and in vitro digestibility of starch treated with CP, different moisture content (16.7 %, 28.6 %, 37.5 %, 44.4 %, and 50 %, w /w) were used, followed by treatment with CP (40 V , 1 A, 3 mins). Results show that CP treatment preserves the Maltese cross pattern, crystal morphology, and Fourier transform infrared spectroscopy spectra of potato starch. However, significant changes were observed in molecular weight, chain length distribution, average particle size, ordered structure, and relative crystallinity. As moisture content increased, the etching effect on the particle surface intensified, leading to further reductions in molecular weight and ordered structure. Concurrently, amylose content, solubility, relative crystallinity, and resistant starch content increased. At higher water levels, water molecules exhibited protective effects, mitigating CP-induced structural damage by reducing etching and loss of molecular weight. These findings suggest that the role of water in CP treatment is complex and provide insights into the interaction between CP and water in starch properties, highlighting its potential applications in starch-based foods.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Liming Hu,Abdou Latif Imorou,Zhixin Chen,Henglin Xiao
Efficient slurry dewatering is critical in numerous engineering and environmental applications. Traditional electro-osmosis methods often struggle with uneven electrical field distribution and electrode corrosion, limiting their performance. To address these challenges, this study presents an enhanced pressurized electro-osmotic dewatering (EPEOD) technology featuring a three-electrode array configuration and a fabric electrode (FE) material. This configuration offers bi-directional water migration, superior corrosion resistance, and uniform electric current distribution, enhancing dewatering efficiency significantly. Experiments were conducted using slurry samples of bentonite and kaolin in varying proportions to assess the variation in dewatering performance and soil properties. The findings demonstrated that the proposed technique significantly improved water removal, reducing the initial moisture content from 325 % to a final moisture content of 94.3 % for a 100 % bentonite sample. This performance was notably better than that of other methods, such as mechanical dewatering (MD), electro-osmotic dewatering (EOD), and pressurized electro-osmotic dewatering (PEOD) with electrode reversal (ER) technique with a final water content of 130.4 %. The electrode array configuration and the fabric electrode minimize corrosion and reduce electrical potential loss at the electrode-soil interface. Ion concentration profiles indicated that Ca 2+ ions are primarily responsible for the transportation of pore water toward the cathode. The EPEOD process was shown to alter soil properties, including reductions in liquid limits (LL) and plasticity indices (PI). Overall, this study highlights the effectiveness of the proposed novel EPEOD technique in enhancing slurry dewatering performance by implementing a three-electrode array configuration and a fabric electrode material.
研究领域:
土木工程
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Biobased Materials and Bioenergy
·
2024
·Vol. 18
·期 5
·803-809
·
IF 0.5
Lv Xuemei,Ai Xin,Zhu Xuechao
This study investigates the effects of light intensity, water content, and the application of biochar nanoparticles (BNPs) on the growth and development of tomato seedlings to provide valuable insight into tomato cultivation. BNPs were prepared using rice straw. In this experiment,
the light intensity was set at 350 μmol ·m−2 · s−1 (L1), 300 μmol ·m−2 · s−1 (L2), and 250 μmol ·m−2 · s−1
(L3). The irrigation amount was set at 150 mL/plant (W1) and 100 mL/plant (W2). The contents of BNPs were set at 0% BNPs (N1) and 5% BNPs (N2). L2W2N2 was used as the control. A total of 12 groups were
included in the study. Groups D, E, F, J, K, and L did not use BNPs, while the remaining six groups used 5% BNPs. We found that BNPs exhibit significant aggregation with spherical morphology. As the pH increased, the particle size of BNPs showed a trend of initial increase, followed by a decrease
and subsequent increase. Carbon elements existed in three different forms and possessed distinct chemical bonds, resulting in different relative contents. The relative content of C═O accounted for 26.40%, which was significantly higher than that of C—O by approximately 15%. Under
the W1 treatment, the height of the tomato plant in L1N2 was 31.7 cm, which is higher by 0.4 cm than that in L1N1. Under L2W1N1 treatment, the net photosynthetic rate, transpiration rate, stomatal conductivity, and
intercellular CO2 concentration of tomatoes were 9.68 μmoL ·m2 · s−1, 1.223 mmoL ·m2 · s−1, 0.071 μmoL ·m2 · s−1, and 626 ppm, respectively,
which are significantly higher than the control. In conclusion, this research provides a foundation for growing tomatoes.
研究领域:
植物生理学
·
农业科学
✓ 已验证
DOI
高影响因子
APPLIED RADIATION AND ISOTOPES
·
2024
·
IF 1.6
Yue Li,Yongqiang Zhang,Guoqiang Zhong,Wenjing Pu,Wei Lu,Weihua Wang
Liquid scintillator consists of an organic solvent and one or more scintillation solutes, which can emit light pulses after absorbing X- and γ-rays, or high-energy particles. It has the characteristics of strong neutron/γ-ray (n/γ) discrimination, short decay time, unlimited size and low cost, which plays an important role in high-sensitivity and large-scale radiation detection, especially in the construction and safe operation of nuclear facilities. However, the impact of solvent selection and moisture content on the fluorescence-scintillation properties of scintillators has not been adequately investigated in the literature. In this study, liquid scintillators consisting of scintillation solutes, 2, 5-diphenyl-oxazole and 1, 4-bis (5-phenyl-2-oxazolyl) benzene, were prepared with different moisture contents, which were determined using the Karl-Fischer method. The fluorescence emission spectra, scintillation sensitivity and n/γ discrimination were systematically characterized using various solvents with corresponding moisture contents. The results show that the scintillation count rate and n/γ discrimination reach their maximum values when employing p -xylene as the solvent and maintaining moisture content below 20 ppm. The theoretical calculation elucidates the performance degradation of liquid scintillators induced by moisture.
研究领域:
核物理
·
辐射探测
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
·
2023
·
IF 10.7
Yuanyuan Chen,Xinshuai Zhang,Sha Li,Ding An,Hongshan Liang,Bin Li,Jing Li
The heterogeneous hygrothermal degradation (HHTD) method can simply and efficiently prepare depolymerized konjac glucomannan (KGM). The degradation rate was significantly improved when the KGM powder moisture was below 20%, but basically no longer increased after the moisture was above 20%. This study systematically examined the influence of the initial moisture content of powder on the molecular structure of KGM and the vapor pressure of degradation system to elucidate the association of these changes with hygrothermal degradation. The results indicated that with the increase of powder moisture, the disorder of KGM amorphous region increased dramatically, and the ordering degree of aggregate structure decreased. Water notably enhanced the freedom of KGM molecular chain motion by reducing the intermolecular hydrogen bond interaction and expanding the free volume. Furthermore, powder moisture markedly promoted the degradation of KGM by increasing the vapor pressure and mass transfer rate of the closed degradation system. The system reached saturated vapor pressure when the moisture content was above 20%. Consequently, the synergistic effect of the water-induced changes in KGM molecular structure and system vapor pressure significantly accelerated the hygrothermal degradation rate of KGM. The promotion effect of powder moisture on degradation reached the upper limit when the moisture content was higher than 20%, thus moderately solvated KGM-20% powder can achieve an efficient hygrothermal degradation effect. This work is expected to provide theoretical bases for the industrial application of HHTD as a controllable and efficient degradation method of KGM.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2024
·
IF 11
Ruican Wang,Richard W. Hartel,Xinyu Zhai,Wenhui Fu,Yi Sun,Shuo Wang
Phase separation is a prevalent phenomenon in gummy confections, often arising from potential molecular incompatibility between gelatin and long-chain polysaccharides in glucose syrups (GS). This study focuses on analyzing the phase separation and gelling behaviors of gelatin-GS mixtures, elucidating the roles played by water content and small molecular weight (MW) additional ingredients. Mixtures with 6% gelatin, 40% GS, and varying portions of water, sucrose/allulose, citric acid (CA), and citrates (soluble/insoluble) were prepared. Phase separation behaviors were observed using inverted fluorescent microscopy, with the gel properties characterized using rheology, texture profile analysis (TPA), and water-holding capacity (WHC) analysis. The results highlight the significant impacts of these small MW components on biopolymer compatibility (cosolubility). In gelatin-GS-water mixtures, reducing the water ratio without the addition of sugars promoted phase separation towards the polysaccharide-rich morphologies, while enhancing the sol-gel transition and gel strength due to increased gelatin/water ratio. The incorporation of sucrose or allulose into gelatin-GS-water mixtures, without altering the gelatin/GS/water ratio, generally improved the protein-polysaccharide co-solubility during mixing but had an adverse overall effect on gel formation. Acidification with CA increased the surface charges of the proteins, enhancing the biopolymer miscibility and gelling performance. Soluble citrates, e.g., sodium citrate (SC) and potassium citrate (PC), promoted protein-polysaccharide miscibility and gelation at low concentrations (1–5%), but led to severe phase separation and weakened gelation at higher dosage levels (7.5–10%). In contrast, insoluble citrate, i.e., calcium citrate (CC), marginally enhanced the protein-polysaccharide miscibility while facilitating gummy gelation as an active filler.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yuling Deng,Meifang Jiang,Qing Liu,Jun Wang,Yi Tao
Ginkgo ester (GBE50) is a well-known botanical drug derived from crude material Ginkgo Folium . Nonetheless, a swift and nondestructive method for full quality inspection on Ginkgo Folium is still lacking. Herein, an interpretable deep learning embedded hyperspectral imaging methodology was established to control the quality of Ginkgo Folium . Hyperspectral images were collected from 102 batches of Ginkgo Folium ranging from 389.8 nm to 1048.2 nm. The contents of three flavonol glycosides and four terpene lactones in Ginkgo Folium were unambiguously determined by well-validated high-performance liquid chromatography (HPLC) and ultra-high performance liquid chromatography-triple quadrupole-mass spectrometry (UHPLC-TQ-MS) methods, whilst the moisture content measured through a moisture meter. In order to realize the real-time full quality inspection, competitive adapative reweighted sampling-partial least squares regression (CARS-PLSR) and seven deep learning algorithms (ResNet50, AlexNet, GoogLeNet, DenseNet121, ResNeXt50, Inception-V4 and Inception-ResNet-V2) were attempted to establish a robust quantitative calibration model embedded hyperspectral imager. As a result, DenseNet121 algorithm showed the most excellent predictive performance. The R p 2 values of quercetin, kaempferol, isorhamnetin, bilobalide, ginkgolide A, ginkgolide B, ginkgolide C, and moisture were determined to be 0.9969, 0.9913, 0.9965, 0.9988, 0.9951, 0.9952, 0.9988 and 0.9981, respectively, and the RMSEP values were 0.0084, 0.0094, 0.0103, 0.0053, 0.0056, 0.0099, 0.0084 and 0.0050, respectively. Grad-CAM was used to unlock the blackbox of DenseNet121model and interpret the model. It’s believed that the established DenseNet121 embedded hyperspectral imager can rapidly and nondestructive determine the eight quality attributes and provide a tool for full quality inspection on Ginkgo Folium .
研究领域:
植物学
·
药物分析
·
质量控制
✓ 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）