JOURNAL OF FOOD PROCESSING AND PRESERVATION
·
2022
·Vol. 46
·期 12
·e17177
·
IF 2.609
Xue-Chen Wang,Xiao-Fan Cui,Yi-Nan Du,Shi-Qi Xu,Yu-Qiao Wang,Hai-Tao Wu
The gel properties and microstructure of scallop male gonad hydrolysates (SMGHs) were investigated by combing with κ-carrageenan (κ-C) and locust bean gum (LBG). It was shown that the initial elastic module of SMGHs/κ-C 0.1 Hz got marked improvement from 202.3 Pa to 326.7 Pa and the melting temperature also increased 6°C with the addition of LBG. According to the data of low-field nuclear magnetic resonance, the relaxation time T 23 markedly reduced in SMGHs/κ-C/LBG, representing the migration of water might result in a strong bind among SMGHs, κ-C, and LBG. Fourier transform infrared spectroscopy showed the existence of hydrogen bonding between LBG and SMGHs/κ-C. Low-temperature scanning electron microscopy showed that the SMGHs/κ-C/LBG ternary complexes possessed smaller voids and more dense network structures. These results could provide more possibilities for the application of SMGHs and polysaccharide complexes in functional hydrogel development. Novelty impact statement We evaluated the gel and microstructure properties of ternary composite gel consisted of protein hydrolysates from male gonad of scallop ( Patinopecten yessoensis ) (SMGHs), κ-carrageenan (κ-C), and locust bean gum (LBG). The results showed that the addition of κ-C and LBG significantly improved the gel properties of SMGHs.
研究领域:
食品科学
·
材料科学
·
生物物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Wanbin Zhang,Kangmin Zhang,Ying Wang,Lun Du,Ruijun Liu,Junfeng Zhu,Ce Zhang,Guanghua Zhang
In this work, the architecture of poly(sodium styrene sulfonate) (PSSNa) dispersants were flexibly tailored by various strategies. Three categories of PSSNa dispersants with different topologies were obtained, namely, linear structured PSSNa (1-A-PSSNa), three-arm star PSSNa (3-AS-PSSNa) and six-arm star PSSNa (6-AS-PSSNa). The molecular weights ( M n ) of these dispersants were adjusted in the range of 3200–26,200 g/mol by varying the feeding ratio of monomer to initiator. In addition, the polydispersity index (PDI) of resultant dispersants were also varied by using different polymerization technologies, such as atom transfer radical polymerization (ATRP) and conventional free radical polymerization technique (RP). Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy and gel permeation chromatography (GPC) verified these architecture parameters of resultant PSSNa dispersants. Afterwards, the impact of these architectural factors on the performance of PSSNa dispersants in coal water slurry (CWS) preparation were evaluated. The results revealed that with the M n of dispersants increased from 9800 to 26,200 g/mol, the apparent viscosity of CWS increased by around 11 %. The comparison between dispersants with approximate M n (26,200 and 26,900 g/mol) and very different PDI (1.27 and 2.25) indicated that wide PDI are favourable for the performance. This work also confirmed that the topology of dispersants has a significant impact on their performance. The maximum coal loaded can increase from 63.9 % to 64.3 % when 1-A-PSSNa dispersant was replaced by 6-AS-PSSNa. Meanwhile, these architectural factors have a limited impact on the fluid type of CWSs, as all CWSs obtained in this work were pseudoplastic fluids regardless of the used dispersants. The potential mechanism was investigated using various technologies, such as the measurements of zeta potentials, contact angles, and low-field nuclear magnetic resonance spectra. The results revealed that topologizing did not alter the interaction between dispersant and coal surface. However, due to the special features of topological polymers, they can grant adsorbed coal particles with enhanced electrostatic repulsion and steric hindrance, which facilitated the dispersion of coal particles.
研究领域:
材料科学
·
化学工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jiahao Liu,Xiaojie Jin,Xi Lu,Xinyu Huang,Hongyan Chen,Long Qiu,Xiaowei Huang,Yongxiu Li,Jing Li
The application of rare earth micro-nano materials requires first formulating them into slurries with high dispersion stability, including polishing powders, catalysts, phosphors, ceramics, and other materials. To achieve this, it is essential not only to prepare monodisperse micro-nano particles but also incorporate appropriate dispersants to prevent particle aggregation. For this purpose, the study designed and synthesized a core-shell structured Gd 3 + -doped CeO 2 -coated SiO 2 composite abrasive: SiO 2 /CeO 2 :Gd. Low-field nuclear magnetic resonance technique was employed to investigate the sedimentation behavior of polishing slurries and explore the mechanism by which different dispersants enhance slurry dispersion stability, achieving real-time nuclear magnetic resonance imaging tracking of the sedimentation process. Results show that: The strong paramagnetic properties of Gd 3+ significantly enhance the relaxation efficiency of water molecules within the particle surface region, thereby serving as a sensitive probe for characterizing the liquid environment at the particle surface. Based on the T 2 distributions, settling can be divided into three stages: homogenization, sedimentation, and agglomeration. In polishing slurries, water molecules primarily exist in three forms: bulk water (P1), hydration layer water (P4) and surface-bound water (P5), attributing to different peaks of T 2 relaxation times. However, only one T 2 peak (P2) was observed for the homogenization slurry due to the rapid exchange among the three kind of water molecules. With the sedimentation proceeding, P2 transforms into two peaks of P1 and P3. The rate of change in the peak areas of P1 and P2 can reflect the sedimentation rate of the slurry. In the agglomeration stage, the overlapping of hydration layers forms interstitial water, leading to an increase in its T 2 relaxation time. Therefore, the P3 can further split into two peaks of P4 and P5, corresponding to interstitial water and surface-bound water in the sediment layer.
研究领域:
材料科学
·
核磁共振（NMR）
·
化学机械抛光（CMP）
·
胶体与界面科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CEREAL SCIENCE
·
2021
·
IF 3.616
Jinguang Liu,Yuqian Liu,Anqi Wang,Zhen Dai,Rui Wang,Hui Sun,Padraig Strappe,Zhongkai Zhou
Yellowing is associated with the changes in rice quality during storage. This study revealed that the increased yellowness of rice was highly associated with the moisture content of rice during storage. The hysteresis loop formed by sorption and desorption curves showed that the water loss of japonica rice was the largest, suggesting the internal structure of japonica rice was more vulnerable to be damaged. The heat enthalpy of rice increased first, and then decreased during yellowing, indicating the changes in the corresponding rice structure. The changes in the moisture migration were monitored by low-field NMR, and the data showed that the content of tightly bound water decreased during yellowing, and the tightly bound water transferred to higher fluidity in medium moisture content (MMC) and higher moisture content (HMC) sample. The concentration of most esters, ketones and alcohols of rice was increased during yellowing in a lower moisture content (LMC) sample. This study revealed that the yellowing process could inhibit the release of some volatiles for MMC and HMC samples. The increased 1,2-dimethoxy-benzene and phenol in HMC sample during yellowing were the characteristic volatiles for the highest yellowed rice samples. This study may highlight the further understanding of rice yellowing mechanism.
研究领域:
食品科学
·
农业工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yongqiang Li,Zhifeng Shi,Liuyang Shang,Quan Tao,Qisheng Tang,Hans-Joachim Krause,Siwei Yang,Guqiao Ding,Hui Dong
Magnetic relaxation switches (MRS) based on target-induced state changes of magnetic nanoparticles are vital approaches for biomolecule detection in in vitro diagnosis. Recently, magnetic graphene quantum dots have been employed as magnetic probes instead of iron oxide nanoparticles and showed high sensitivity. Introducing magnetic separation into an MRS assay before the relaxometry measurements can enhance the sensitivity, elevate accuracy, and expand the linear region. In this work, magnetic separation-assisted MRS was developed to detect endoglin utilizing iron oxide as the magnetic carrier and magnetic graphene quantum dots as the magnetic probe. The assay possesses a broad linear region from 5 ng/mL to 50 μg/mL and a sensitive limit of detection of 1.3 ng/mL, which is two orders of magnitude lower than that of MRS without magnetic separation. The high accuracy and consistency have been proved for endoglin (CD105) detection in real samples. This graphene quantum dot-based MRS involving magnetic separation provides a new route for enhancing the sensitivity and accuracy of biomolecule detection.
研究领域:
生物分子检测
·
纳米技术
·
磁共振
·
体外诊断
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Lian Jiang,Yongli Tian,Haide Zhang,Shisheng Liu
The high temperature induces conformational changes in β-glucosidase, making it inactive and limiting its application field. In this paper, the effect of trehalose on the thermostability of β-glucosidase from low-moisture Hevea brasiliensis seeds was investigated. The results showed that the residual enzyme activities of β-glucosidase supplemented with trehalose after high-temperature treatment were significantly higher than that of the control group. The improvement of thermostability could be explained by low-field nuclear magnetic resonance (LF-NMR) and molecular dynamics (MD) simulations at the molecular level. Moreover, adding trehalose increased the water activity and water content of β-glucosidase, leading to a more stable conformation. Trehalose replaced some water and formed a stable network of hydrogen bonds with protein and surrounding water. The glass formed by trehalose also reduced molecular movement, thus providing good protection for enzymes.
研究领域:
酶学
·
生物化学
·
生物物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULES
·
2024
·
IF 5.1
Yijie Jin,Shan Lu,Xinran Chen,Qianyao Fang,Xin Guan,Liguo Qin,Chongyi Chen,Chuanzhuang Zhao
Breakthrough to the extreme properties of polymer networks relies on new insights into their molecular dynamics. Time-salt concentration superposition has been discovered in polyelectrolyte coacervate systems, proving instrumental in tuning the mechanical performance of polyelectrolyte hydrogels. However, time-salt type superposition has never been mentioned in the existing literature. Herein, we reported that the mechanical properties of poly(methacrylamide) (PMAm) hydrogel can be systematically regulated in a vast range by treating with different salts, for example, Young’s modulus can be tuned from 10–2 to 103 MPa. The unusual behavior of salt-stiffening arises from the salt-enhanced phase separation of the polymer network and a subsequent glassy transition of the polymer-rich phase. Rheological results demonstrate that the dynamic behavior of the hydrogels can be superposed onto “time-salt type” master curves with the salt types aligning along the Hofmeister series. The time-salt type shift factor exhibits correlation with the mobility of water molecules as revealed by low-field nuclear magnetic resonance spectroscopy. A polymer–water–salt ternary interaction mechanism was proposed to elucidate the time-salt type equivalent behavior. Guided by the “time-salt type” superposition principle, a salt processing strategy was brought up to expand the property limits of the PMAm hydrogel. With simply switching the type of salt employed, the hydrogel could either be a stiff and wear-resistant material akin to glassy plastics or a soft and flowable gel utilizable for recycling.
研究领域:
高分子科学
·
材料科学
·
化学工程
·
物理化学
✓ 已验证
DOI
高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2024
·
IF 6.4
Hongchen Wan,Zhiwei Zhu,Da-Wen Sun
Moisture plays an important role in fruit preservation. In this study, deep eutectic solvents (DESs) were prepared and DES-based films with the property of buffering moisture variation were fabricated (CG 10 , CG 50 ). Low-field nuclear magnetic resonance (LF-NMR) analyses and Raman spectra suggested that the water states in DESs and DES-based films transferred from a tight combination to a loose combination during the moisture sorption process. In addition, the moisture sorption capacity (M eq = 2.91) of the film suggested that CG 50 possessed water storage capacity and a high effective diffusion coefficient (0.01 mm 2 d −1 ) ensured the easy passing of water molecules through the DES-based films. Furthermore, the fruit preservation experiment using cherry tomatoes as a representative showed that DES-based films as a “buffer pool” not only could inhibit spoilage but also maintain the stable packaging RH, indicating the potential of DES-based films in moisture regulation.
研究领域:
食品科学
·
材料科学
·
农业工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Youquan Ling,Luxiang Zhao,Yanjiang Bai,Shuai Li,Junjie Liu,Bolin Xiao,Xi Zhang,Mei Liang,Yang Chen,Huawei Zou
In this study, high-energy electron beam irradiation was strategically employed to modify the interface of the aramid fibers. Systematic investigation revealed that controlled irradiation doses produced dual surface enhancements: simultaneous generation of reactive functional groups and nanoscale topological restructuring. These synergistic modifications effectively improved the interfacial adhesion with EPDM rubber matrices. The optimized coirradiation protocol with epichlorohydrin demonstrated superior performance, achieving remarkable enhancements of 154% in H-pullout force and 30% increase in tensile strength of EPDM composites. Advanced characterization through low-field NMR coupled with in situ electron microscopy analysis elucidated the dynamic interfacial bonding mechanism and its direct correlation with macroscopic mechanical properties. Furthermore, the strengthened interface was found to facilitate carbon layer evolution during ablation, enabling the formation of denser adiabatic carbon structures that reduced the mass ablation rate by 21%. This radiation-induced interfacial engineering approach presents a scalable pathway for manufacturing high-performance flexible composites, successfully addressing the long-standing challenge of balancing mechanical robustness with thermal protection requirements in aerospace applications.
研究领域:
材料科学
·
聚合物复合材料
·
辐射加工
·
航空航天工程
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Qi-Yue Guo,Shu-Yue Ren,Jing-Yi Wang,Ye Li,Zi-Yi Yao,Hui Huang,Zhi-Xian Gao,Shi-Ping Yang
Based on superparamagnetic nanoparticles , a responsive polyacrylamide hydrogel self-assembled by nucleic acid hairpin hybridization chain reaction was designed, and a universal low field nuclear magnetic resonance sensing platform was successfully constructed. As the target was gradually added, the hydrogel coating on the surface of the magnetic nanoparticle was opened layer by layer through binding with the aptamer, which specifically bonded thereto, causing different degrees of exposure of the magnetic nanoparticle, resulting in changes of low field nuclear magnetic resonance signals. This method was originally applied to the rapid detection of adenosine triphosphate (ATP), and the versatility of the method was verified using polychlorinated biphenyl 77 (PCB77). This method had the advantage of being fast, convenient, and low cost, and it can be easily operated with high repeatability. This universal method can detect a variety of targets by replacing aptamers and may be useful in controlling food quality and for rapidly detecting cancer cells in vitro.
研究领域:
分析化学
·
纳米技术
·
生物医学工程
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Daojiu Zhang,Xu Yang,Yichun Wang,Biao Wang,Shaoyu Wang,Jinyang Chang,Suwen Liu,Hao Wang
We investigated the roles of Proanthocyanidin B2 (PCB2) and transglutaminase (TGase) in improving myofibrillar protein (MP) gel properties. TGase and PCB2 increased the surface hydrophobicity (41 %) and water holding capacity (WHC) (16 %) of the MP. Secondary and tertiary structures of MP were respectively analyzed by Fourier transform infrared spectroscopy (FTIR) and fluorescence spectrophotometry. The content of α -helix in MP was found to be increased while its fluorescence intensity decreased upon the addition of PCB2 and TGase. The addition of PCB2 and TGase resulted in formation of a dense MP network structure as revealed by scanning electron microscopy (SEM). Low-field nuclear magnetic resonance (LF-NMR) and magnetic resonance imaging (MRI) analysis showed that immobilized water levels in the MP gel were markedly increased while the amount of free water was significantly decreased after PCB2 and TGase addition. These findings indicate that a combination of PCB2 and TGase are potential additives for meat products.
研究领域:
食品科学
·
蛋白质化学
·
生物物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Kangyong Zhang,Hongwei Tang,Muhammad Salman Farid,Fangqin Xiang,Bailiang Li
The processing characteristics of yogurt are closely related to the composition and arrangement of exopolysaccharides (EPS) in lactic acid bacteria (LAB). To fully understand and develop the functional properties of EPS and to study the effect of EPS molecular weight on yogurt and its mechanism, the physicochemical properties of high molecular weight EPS-LH43, medium molecular weight EPS-LH13, and low molecular weight EPS-LH23, as well as the gel properties and protein conformation of yogurt, were determined and analyzed in this experiment. The results indicate that EPS-LH43 and EPS-LH13 are both composed of mannose, rhamnose, galacturonic acid, glucose, and galactose. EPS-LH23 is composed of mannose, galacturonic acid, glucose, and galactose. Their Number-average Molecular Weight is 5.21 × 10 6 Da, 2.39 × 10 6 Da and 3.76 × 10 5 Da, respectively. In addition, all three types of EPS have good thermal stability and can improve the stability of casein. In addition, the analysis of the texture, particle size, potential, water holding capacity, rheology, low field nuclear magnetic resonance, microstructure, and flavor characteristics of yogurt confirmed the relationship between the molecular weight of LAB EPS and the gel properties of yogurt. Fluorescence spectrophotometer and circular dichroism analysis indicate that the different molecular weights of LAB EPS have different effects on protein structure, which is an intrinsic factor leading to significant differences in the gel properties of the three types of fermented milk. These findings provide new references for enhancing the understanding of the structure-activity relationship of EPS and indicate that EPS-LH43 can be used to improve the gel properties of dairy products.
研究领域:
食品科学
·
微生物学
·
化学
·
乳品科学
✓ 已验证
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）