FOOD CHEMISTRY
·
2018
·
IF 4.946
Lanxin Luo,Yan Cui,Jinhui Cheng,Bairui Fang,Zongmin Wei,Baoshan Sun
To develop an efficient method for degradation of grape seed and skin proanthocyanidins polymers into oligomers, an optimized sulphurous acid degradation conditions for grape seed with the temperature of 60 °C, reaction time of 60 min and sample-sulphurous acid ratio of 1:0.2, and for grape skin with the temperature of 40 °C, reaction time of 60 min and sample-sulphurous acid ratio of 1:0.2, were established. Afterwards, HSCCC and prep-HPLC were used to fractionate and isolate individual proanthocyanidin oligomers from the degradation products. Total of ten dimeric or trimeric procyanidins were obtained, and most of them presented high yield (from 0.7 mg to 13.6 mg per run in grape seed and from 0.5 mg to 4.1 mg per run in grape skin) and high purity (over 90%). The proposed method provides a new way for large preparation of oligomeric proanthocyanidins from naturally abundant and wasted polymeric ones.
研究领域:
植物化学
·
食品科学
·
天然产物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 54
·34107-34116
·
IF 3.361
Jiawei Li,Ouwen Xu,Xiashi Zhu
In this study, an on–off–on fluorescence probe for the detection of trace Cu(II) and ascorbic acid (AA) based on biomass-derived sulfur and nitrogen double heteroatom-doped carbon dots (N,S-CDs) was designed. For the first time, the probe (N,S-CDs) was prepared from grape seeds and thiourea as the precursor. Cu(II) was added to the carbon point solution, the fluorescence intensity (FL) of N,S-CDs was strongly quenched (switch OFF) and the fluorescence probe turned to “ON” (switch ON) with the addition of AA. Under the optimal conditions, the as-synthesized N,S-CDs had a good detection performance for Cu(II) and AA assay with the linearity ranges from 150–500 μg mL−1 and 0.1–400 μg mL−1, and the LODs were 0.048 mg L−1 and 0.036 mg L−1, respectively. The as-prepared N,S-CDs exhibited a low cytotoxicity and a good biocompatibility, which show their potential for application in the biological imaging of living cells.
研究领域:
生物化学
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2024
·
IF 4.9
Shiqin Dong,Haiyang He,Zhilian Qiu,Liguo Peng,Shuang Qin,Jianjun Fang,Dianwen Liu,Peilun Shen
This study explores the selective depression mechanism of pyrite by proanthocyanidins (PC) during chalcopyrite-pyrite flotation separation. The selective inhibition effect of inhibitor PC was examined through flotation experiments. The depression mechanism of PC on pyrite was analyzed employing X-ray photoelectron spectroscopy (XPS) analysis, selective adsorption tests, adsorption experiments, contact angle measurement, and zeta potential measurement. The artificial mixed mineral flotation test of chalcopyrite-pyrite at a ratio of 1:12 was conducted under pH 7, PC concentration of 75 mg/L, and PAX concentration of 18.75 mg/L. The copper concentrate exhibited a recovery rate of 88.97%, with a copper grade of 29.43%. The sulfur grade in copper concentrate was 40.35%, and the pyrite recovery rate was 1.97%. PC can be used as a potential depressant of pyrite. adsorption experiments and Zeta potential measurement indicated that PC treatment significantly impeded PAX adsorption on the pyrite surface, as confirmed by XPS test results and Ion adsorption analysis.
研究领域:
矿物加工工程
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环境科学
·
材料化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CEREAL SCIENCE
·
2020
·
IF 2.938
Yuxue Zheng,Jinhu Tian,Yukiharu Ogawa,Xiangli Kong,Shiguo Chen,Donghong Liu,Xingqian Ye
To characterize the impact of grape seed proanthocyanidins (GSPAs) on the physicochemical properties and in vitro digestibility of extruded rice, the XRD, RVA, DSC , FT-IR, micro-CT, as well as the in vitro digestion model was applied. Compared with normal rice, the extruded rice with different proportions of GSPAs (0–1.5%) increased the color depth, enhanced the porosity, and changed the semi-crystalline structure of extruded rice from an A-type to a mixture of A- and V-types. The viscosity and thermal properties of extruded rice with GSPAs were also changed noticeably. Additionally, a significantly lower equilibrium hydrolysis and k constant were observed in extruded rice with GSPAs ( p < 0.05). Those results indicated that extruded rice with GSPAs could be an attractive approach to produce rice starchy food with low digestibility.
研究领域:
食品科学
·
营养学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Zhuo Ge,Hanyu Ren,Rongli Zhang,Chunhui Luo
Establishing the adhesion between soft yet wet materials remains challenging due to the interfacial water, the dilution of polymer strands, and the lubrication of the interface. Herein, nanohesives based on the grape seed protein and tannic acid (GSP-TANHs) were reported to adhere various hydrogels (including polyvinyl alcohol, polyacrylamide, poly 2-acrylamido-2-methyl-1-propane-sulfonic acid, and chitosan) with each other. Due to the rapid formation of widely available short-range forces between nanoparticles and hydrogel surfaces, GSP-TANHs could establish the initial adhesion around 10 s. Additionally, they served as universal hesives to a wide range of substrates without chemical modifications or pretreatments for adherents, such as plastics, cardboard, glass, iron, and rubber. The adhesion force for cardboard reached 11.37 N. Meanwhile, the adhesion force could be easily regulated by varying nanoparticle sizes and specific surface area. Thanks to the sensitivity of hydrogen bonding to heating, on-demand debonding was realized after increasing the temperature to 45 °C. Because of the reversible interactions, the adhesion was also repeatable. Due to the merits of grape seed protein and plant polyphenol, it could be completely biodegraded within 7 days. Bearing several merits, this strategy has promising applications in new implantable devices, E-skin, and biofabrication processes.
研究领域:
材料科学
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生物医学工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Carbon Letters
·
2025
·
IF 5.8
Ding Lixin,Sun Na,Zuo He,Luan Fang,Hou Lin,Chen Zhiyou,Sun Xue,Zheng Yuting,Dai Zongyu,Lv Yuguang,Hou Xingyu
Waste utilization is not only a way to protect the environment and realize green chemistry, but also a means to create novel materials. In this study, based on waste grape seeds as the biowaste-derived carbon dots (G-BCDs), a straightforward one-pot green method was employed for the rapid detection of folic acid (FA). Owing to the internal filter effect and the static mixing quenching mechanism, the sensing principle of G-BCDs was effectively quenched by FA. The results showed fluorescence at an emission wavelength of 415 nm upon excitation at 330 nm with a quantum yield of 1.5%. Particularly, the FA sensing assay obtained a broad linear range of 2–220 μM and the limit of detection was 0.48 μM. In addition, the fluorescence probe was successfully utilized for detecting FA in tablets, blood, and urine samples, yielding desirable results, which indicated promising applications in the fields of biological and pharmaceutical analysis. Graphical abstract
研究领域:
分析化学
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环境科学
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生物医学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 37
·49118
·
IF 2.52
Chunhui Luo,Ning Wei,Xinxin Sun,Faliang Luo
Developing hydrogels with excellent mechanical performances and multiple functions is challenging. Herein, polyvinyl alcohol (PVA) and grape seed extracted polymer (GSP) were used to achieve this goal. The hydrogel was firstly cross-linked by crystalline regions of PVA upon freezing–thawing cycles, it was further immersed in ammonium sulfate (AS) solution to induce the hydrophilic to hydrophobic transition of GSP. The relationship between microstructures and mechanical properties of the obtained PVA–GSP hydrogel was revealed. The results showed that the PVA–GSP precursor hydrogels were weak due to the uneven network and lower cross-link density. After soaking in ammonium sulfate solution, the network became more dense and uniform because of the hydrophilic to hydrophobic transition of GSP. Meanwhile, frictions between polymer chains increased. As a result, ultra-strong (tensile stress = 20.5 MPa), antifatigue (>95%), self-healable (healed stress = 10.0 MPa), and conductive hydrogels were obtained. The strength and toughness of our gel are among top values in literature to date. Furthermore, the swollen gel even after soaking in DI water for 36 hr still maintained tensile strength at the megapascal level, superior to most water-rich hydrogels. This tough and functional gel might find potential applications in cartilage repair, artificial skin, and sensors.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Zhuo Ge,Zi Wang,Chunhui Luo
Realizing adhesion between wet materials remains challenging because of the interfacial water. Current strategies depend on complicated surface modifications, resulting in limited functions. Herein, a facile strategy based on the powder of grape seed protein and tannic acid (GSP-TA) was reported to endow various non-adhesive hydrogels adhesion without chemical modifications for both hydrogels and adherents. The GSP-TA powder has the capability to absorb interfacial water, form an adhesive layer on the hydrogel surface, diffusion into the underneath hydrogel matrix, and establish the initial adhesion within 5 s. By forming multiple non-covalent interactions between powders and substrates, the GSP-TA powder served as an efficient surface treating agent, enabling robust adhesion to solid substrates (wood, cardboard, glass, iron, and rubber) and wet tissues (pigskin, muscle, liver and heart). The adhesive strength for wood, cardboard, glass, iron, and rubber was 145.92 ± 5.93, 123.93 ± 15.98, 66.24 ± 7.67, 98.22 ± 4.13, and 80.83 ± 7.48 kPa, respectively. Because of reversible interactions, the adhesion was also repeatable. Due to the merits of grape seed protein and plant polyphenol, it could be completely degraded within 11 days. Bearing several merits, this strategy has promising applications in wound patches, tissue repair, and sensors.
研究领域:
材料科学
·
生物医学工程
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Sheng-Xiong Chen,Zhi-Jing Ni,Kiran Thakur,Shaoyun Wang,Jian-Guo Zhang,Ya-Fang Shang,Zhao-Jun Wei
Noodles were prepared using wheat flour supplemented with 1%, 3%, and 5% grape seed power (GSP). The farinograph properties of wheat flour, the textural properties of the dough, and thermal properties of the gluten were determined. The microstructure was analyzed by scanning electron and atomic force microscopy, and the effects of the addition of GSP on the physicochemical and structural properties (free sulfhydryl content, surface hydrophobic region, and secondary structure) of wheat gluten protein were analyzed. 1% GSP promoted the aggregation of gluten proteins by promoting hydrophobic interactions and hydrogen bonding, thus enhanced the noodle quality. Whereas, 3% and 5% GSP addition disrupted the disulfide bonds between gluten protein molecules and formed macromolecular aggregates linked to gluten proteins through non-covalent bonds and hydrophobic interactions, which prevented the formation of the gluten protein reticulation structure. Our study emphasized the interaction between wheat proteins and GSP in noodle making dough.
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
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2017
·
IF 4.421
Yao Ping,Jun Zhang,Tieling Xing,Guoqiang Chen,Ran Tao,Kwang-Ho Choo
This study focused on the green synthesis of silver nanoparticles (AgNPs) using grape seed extract and their use for the catalytic degradation of a hazardous dye. The reaction temperature for the synthesis had great impacts to the properties of AgNPs and thereby, contributed to their activity for reductive decomposition of Direct Orange 26 by NaBH 4 . The elevated temperature made silver particles grow bigger and so reduced the effectiveness of surface catalysis. This was evidenced by the decrease in the reaction rate of AgNPs. The biosynthesis of AgNPs below 40 °C had no negative effect on the degradation of Direct Orange 26.
研究领域:
纳米材料
·
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
STARCH-STARKE
·
2016
·
IF 1.523
Hualin Wang,Jian Lv,Suwei Jiang,Baicheng Niu,Min Pang,Shaotong Jiang
The present work aimed to develop a porous-gelatinized corn starch and evaluate its adsorption of grape seed proanthocyanidins (GSPs). The starches were fabricated by subjecting a porous starch (enzymolysis with α-amylase and amyloglucosidase) to moderate gelatinization at 65°C for 3 h. The resulting morphology, structure, and properties strongly depended on the order of the enzymolysis and gelatinization steps. The porous-gelatinized starch was mesoporous. During gelatinization, the pores in the enzymolysis starches shrank and some disappeared. Neither enzymolysis nor gelatinization changed the basic chemical structures of the starch. However, the crystallinity was increased by enzymolysis and decreased by gelatinization. Furthermore, the reduction in crystallinity decreased the enthalpy change (Δ H ) and increased the peak temperature ( T p ). The limited swelling upon gelatinization favored the diffusion of water molecules into the starch matrix and increased the water absorbability of the starches. A pseudo-first-order kinetic model accurately described the adsorption of porous-gelatinized starch toward GSPs ( R 2 > 0.995). The porous-gelatinized starch showed the best adsorption capability ( q e = 18.890 ± 0.084 mg/g) and a relatively low desorption tendency (49%) toward GSPs. Thus, this starch may be used as an effective adsorbent in order to improve the utilization efficiency of GSPs and maintain their antioxidant activity.
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
Materials Today Communications
·
2022
·
IF 3.662
Zi Wang,Min Huang
Conductive hydrogels were fascinating stretchable conductive materials that have found widespread application in electronic skin, wearable sensors and soft robots. Nonetheless, similar to conductive materials, conductive hydrogels experience severe performance degradation in strong UV environments and cold, dry climates, which severely restricts their practical applications. Using grape seed extract polymer (GSP), sodium chloride (NaCl), and a DMSO/ water binary solvent system, a type of hydrogel with a variety of fascinating multifunctional properties was quickly fabricated. The presence of GSP and NaCl endows hydrogel materials with remarkable UV-blocking (∼82%), DPHH radical scavenging ability (∼76.33%) and conductivity, allow them to be utilized as sensors. In addition, a DMSO/water binary solvent provides the hydrogel with superior long-term drying resistance and freezing tolerance, as well as excellent stretchability (>300%) and good conductivity even at − 23 °C. This work investigates the potential of dynamic plant catechol chemistry in the field of hydrogel materials and anticipates that it will enable flexible sensors capable of adjusting to a variety of complex environments.
研究领域:
材料科学
·
生物医学工程
✓ 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）