INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Isaac Duah Boateng,Xiao-Ming Yang,A.A. Aly Tahany,Yuan-Yuan Li,Yolandani
Fresh Ginkgo biloba L. seeds (GBS) contain toxic compounds that are deleterious when consumed frequently, but the drying process can reduce its content. In this study, fresh GBS was rehydrated using two steps: dried using different methods (freeze-drying, infrared drying, hot-air drying, and pulse-vacuum drying) followed by rehydration by submerging into water. The influence of drying methods on rehydration kinetics and quality attributes were evaluated. Results showed the Weibull model provided the best fitting for each rehydration curve (Coefficient of determination ( R 2 ) > 0.99, residual sum of squares (RSS), reduced chi-square ( χ 2 ), and root mean square error (RMSE) closer to zero). Toxic compounds (ginkgotoxin, ginkgolic acid, and cyanide) decreased significantly while total phenolic content (TPC) and total flavonoid content (TFC) increased in rehydrated products compared with fresh GBS. The sensory score was acceptable for all rehydrated products. Besides, rehydrated products showed retention of antioxidant activities and the formation of Maillard reaction products (MRP). Amongst rehydrated products, infrared drying coupled to rehydration stood out being superior with higher TPC, TFC, MRP, and antioxidant activities and lowest enzyme activities, which were again corroborated from the principal component analysis. The present findings will offer more information in selecting the best drying method for GBS's rehydration as a snack, breakfast, or others.
研究领域:
食品科学
·
植物学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Changmin Qi,Yunlei Zhang,Jie Tang,Weiyi Zhao,Shuanhong Ma,Bo Yu,Meirong Cai,Feng Zhou
Synovial exudation, creeping, and lubrication failure in natural cartilage under a long-term normal loading can be counteracted by a tribo-rehydration (sliding-induced rehydration) phenomenon. Hydrogels, as porous materials, can also restore interfacial lubrication and overcome creep through this strategy. At appropriate sliding velocities, water molecules at the interface contact inlet are driven by hydrodynamic pressures into the porous network to resist creep extrusion. In this work, polyelectrolyte brushes were grafted onto the hydrogel surface to construct a loose, large-pore network structure and improve the interface hydration, enhancing the tribo-rehydration. Compared to the gel without grafted brushes, the grafted surface facilitated the water molecules flowing into the gel network, and the hydrated brushes effectively anchor water at the interface and increase their enrichment at the contact surface for enhancing the rehydration. Finally, the structure of the polymer brush was modulated by multivalent ions to explore the relationship between the rehydration and structure. These results indicate that constructing a loose, hydrated polymer brush layer on the gel surface significantly enhances its tribo-rehydration capability. This strategy can not only improve the load-bearing capacity and resistance to creep of the hydrogel but also effectively restore and maintain long-term lubrication.
研究领域:
生物材料学
·
生物力学
·
医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2021
·
IF 4.952
Xiang Li,Jian Li,Rui Wang,Abdul Rahaman,Xin-An Zeng,Charles S. Brennan
This study aimed to investigate the effects of pulsed electric field (PEF), ultrasound (US), and combined pretreatments (PEF-US) on mass transfer, rehydration capacity, microstructure, and nutritional quality of shiitake mushrooms (Lentinus edodes) . The results indicated that pretreatments could accelerate mass transfer during the hot-air drying process at 65 °C, resulting in lower drying time and energy requirement than control. Meanwhile, the low-field nuclear magnetic resonance (LF-NMR) analysis revealed better rehydration capacity of the pretreated groups than the untreated group. The results of scanning electron microscopy (SEM) demonstrated that pretreatments significantly changed the cell structure by developing intracellular space and larger cavities and facilitating the drying and rehydration process of mushrooms. Additionally, the physiochemical analysis illustrated that pretreatment could preserve the color and nutritional quality more effectively than the untreated groups. Of the pretreatment groups, the shortest drying time was observed in the combined (PEF-US) group (4.7 h). The PEF-US pretreated mushroom also exhibited the highest phenolics (224.17 μg/μL) and soluble sugar (3.90 mg/mL) levels. Overall, the study concluded that the combined pretreatment group (PEF-US) was a promising pretreatment method for hot-air drying of mushroom products to improve the drying efficiency, product quality control, and nutritional value protection.
研究领域:
食品科学
·
生物工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Xin Su,Dezhao Hao,Xiuqi Xu,Xinglin Guo,Zhengning Li,Lei Jiang
Hydrogels, as a representative of soft and biocompatible materials, have been widely used in biosensors, biomedical devices, soft robotics, and the marine industry. However, the ir-recoverability of hydrogels after dehydration, which causes the loss of original mechanical, optical, and wetting properties, has severely restricted their practical applications. At present, this critical challenge of maintaining hydrogels’ accurate character has attracted less attention. To address this, here we report a hydrogel based on synergistic effects to achieve both well-regulated rehydration and deswelling properties. The hydrogel after dehydration can quickly restore its original state both on the macro- and microscale. In addition, the hydrogel has excellent mechanical stability after several dehydration–rehydration cycles. All of these properties offer a possibility of water condition endurance and increase the service life. The robust property is attributed to the hydrophilic–hydrophobic and ionic interactions induced by the synergy of hydrophilic/oleophilic heteronetworks. Moreover, zwitterionic segments as hydrophilic network play a vital role in fabricating anti-biofouling hydrogels. The durable and reusable hydrogel may have promising applications for biomedical materials, flexible devices, and the marine industry.
研究领域:
材料科学
·
生物医学工程
·
海洋科学
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2024
·
IF 11
Jie Jia,Jiayi Duan,Xin Jia,Junlin Ge,Mengxue Dong,Xuebo Liu,Xiujuan Yang,Xiang Duan
Spray-dried egg white powder has limited applicability as a raw material in food production due to its deteriorative rehydration capacity. Lactic acid fermentation is a promising technique for protein denaturation and has been widely used in the food industry. In this work, we investigated the effects of 4, 8, and 12-h lactic acid fermentation on protein structure, powder characteristics, rehydration capacity, and foaming property of spray-dried egg white powder. Results show that the fermentation treatment significantly reduced the surface hydrophobicity of egg white powder samples, while 8 and 12 h of fermentation significantly increased their zeta potential. During the 12 h of fermentation, the particle size of the powder gradually decreased from 2.59 μm to 1.69, 1.23, and 0.76 μm, respectively. Scanning electron microscope result shows the same and also indicates a concave hole structure in fermented egg white powders. These changes in protein molecules result in the significantly improved wettability, dispersibility, and solubility of the powder, thus enhancing its rehydration capacity. The foaming ability and foam stability of egg white powder also significantly improved after fermentation. Furthermore, the fermentation process altered the secondary structure, moisture content, bulk densities, flowability, and color of the powder. This work demonstrates the usefulness of lactic acid fermentation in enhancing the quality of egg white powder. The findings have significant implications for the development of better-quality egg white powder products in the food industry.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Tengjiao Xu,Lin Zhang,Bowen Song,Xi Bai,Zixuan Huang,Xiaodan Bu,Tiantian Chen,Hai Fu,Peipei Guo
The irrecoverability of mechanical strength , conductivity and other properties after dehydration, has severely restricted the practical applications of hydrogels. To address this issue, here we report a P(AA-SMA-SBMA) zwitterionic copolymer-based hydrogel with anti-swelling, high mechanical property and reusability after dehydration/hydration process by polymerization of acrylic acid (AA), octadecyl methacrylate (SMA) and sulfobetaine methacrylate (SBMA). The structures of the original hydrogels and that after dehydration/hydration cycles were characterized by SAXS , SEM, Raman, FT-IR, XRD , DSC and rheology, etc. It was proved that both the macroscopic properties and the micro-structures were maintained after several dehydration/hydration cycles, owing to the synergistic effects of hydrophobic and super-hydrophilic interaction in the 3D network structure. Moreover, the fabricated hydrogels possess high strain sensitivity which is applied to monitor both junction motion and subtle movement like breathing and pulse. In addition, such sensitivity of the hydrogel sensors could be maintained after several dehydration/hydration cycles or even sinking in water for over two months. This work provides a type of hydrogel material with stable properties after dehydration process by regulating hydrophobic and hydrophilic interaction , which is beneficial for the life-time and sustainability of hydrogel devises.
研究领域:
材料科学
·
生物医学工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Soft Matter
·
2022
·Vol. 18
·期 10
·2072-2081
·
IF 4.046
Feixue Gong,Na Du,Wanguo Hou
We recently found that rough glass surfaces (RGSs) can in situ mediate the micelle-to-vesicle transition in single-component solutions of simple single-tailed amphiphiles (STAs), but only result in a relatively small number of vesicles coexisting with a large number of micelles. In the current work, a dehydration–rehydration (DHRH) method was used to induce the formation of vesicles in the single-component aqueous solutions of alkyltrimethylammonium bromides (CnTABs, n = 12, 14, and 16), a kind of typical cationic STAs. That is, a CnTAB micelle solution dropped on smooth glass surfaces (SGSs) was first dried, and the dried CnTAB aggregates were then rehydrated in a monomer solution of CnTAB. A large population of vesicles and even pure vesicle (or vesicle-dominated) systems were obtained, indicating that the DHRH process could more effectively induce the formation of STA vesicles than RGS in situ mediation. The so-obtained vesicles were characterized using DLS, FF-/cryo-TEM, AFM, SAXS, and fluorescence techniques, and their stability was determined. In addition, the effects of the conditions of DHRH and the chain length of CnTABs on the vesicle formation were examined. It was demonstrated that the vesicles can be formed as long as the concentrations of CnTABs in the rehydrated systems are higher than their critical micelle concentrations. The size and wall thickness of vesicles increase with an increase in chain length. A possible mechanism for the DHRH-induced vesicle formation is proposed: bilayer sheets are formed on SGSs during dehydration, and then detached from the SGSs to form vesicles during rehydration. A highly interdigitated structure of alkyl chains between two leaflets was identified in the bilayers, which probably is the origin of the formation and stability of STA vesicles.
研究领域:
生物物理学
·
胶体与界面化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Device
·
2025
·
IF 8
Han Wu,Jun Li,Hengwei Gong,Hui Liu,Wei Ou-Yang
Triboelectric nanogenerators (TENGs) typically use insulating polymers as the tribo-layer and different conductive materials as the electrodes. Conductive hydrogels (CHGs) can be used as both the electrode and tribo-layer and simplify the structure of a TENG. However, hydrogel dehydration may cause charge dissipation, impairing long-term performance. Here, we explore the relationship between electrical conductivity and the surface charge density of the TENG. We leverage the active rehydration behavior of hydrogels instead of conventional evaporation suppression to boost the triboelectric output. This is an alternative to existing material modification techniques. The created CHG-TENG achieves a surface charge density of 325 μC·m −2 and a sensitivity of 1,572 mV·kPa −1 . The high-output and electron-donating CHG with high responsivity has potential for applications in tactile sensor arrays.
研究领域:
生物医学工程
·
柔性电子
·
传感器技术
·
功能材料
·
可穿戴设备
·
组织工程
·
纳米能源
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2024
·
IF 9.5
Liu Rui-Rui,Mao Li-Bo,Yu Shu-Hong
As a renewable, biocompatible, biodegradable soft material, chitin hydrogels have better advantages in stability, antibacterial activity, antifouling, cost, immunogenicity, and so on than most polymer hydrogels. However, compared with other widely used polymer hydrogels with high strength and toughness, the practical applications of chitin-based hydrogels have been limited by their weak mechanical properties, such as cartilage repair and meniscus replacement. Here, we present the design and fabrication of chitin hydrogels with excellent mechanical strength and toughness by a dehydration and rehydration strategy. By sequential dehydration and rehydration processes, the crystalline domains in the chitin hydrogels can be properly controlled. With optimized crystallinity, the elastic modulus of the chitin hydrogels exceeds all previously reported values, and the fracture toughness is even comparable to some synthetic polymer hydrogels, while maintaining a high-water-content of about 80 wt.%. At the same water content, the mechanical properties of the chitin hydrogels are positively correlated with the hydrogel crystallinity, which proves that the change of mechanical properties of hydrogels is not simply dependent on weight concentration. The hydrogels can be further strengthened by incorporating other biopolymers that are intrinsically weak, which makes the hydrogels promising for applications in fields such as cartilage repair and meniscus replacement. Moreover, the hydrogels enable loading and release of water-soluble and poorly water-soluble drugs. This highly extendable strengthening and toughening strategy of chitin and chitin-based biopolymer hydrogels paves the way for their widely applications.
研究领域:
材料科学
·
生物材料
·
生物医学工程
·
组织工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）