JOURNAL OF ANIMAL SCIENCE
·
2022
·Vol. 100
·期 11
·
IF 3.338
Pan Long,Feng Shaoxuan,Li Wang,Zhu Weiyun
High-tannin sorghum grain (HTS) has been previously proved to contain lower apparent total tract digestibility (ATTD) of nutrients than low-tannin sorghum grain (LTS) for pigs. This study was conducted to identify in which segments (foregut or hindgut) of the intestinal tract of pigs the digestion of nutrients was mostly influenced, and to compare the digestion and fermentation characteristics of LTS and HTS in the porcine gastrointestinal tract. In experiment 1, HTS and LTS were digested by porcine pepsin and pancreatin to simulate small intestine digestion, and subsequently the undigested residues were incubated with fresh pig cecal digesta as inoculums for 48 h to simulate the porcine large intestine fermentation in vitro. The results revealed that the in vitro digestibility of air-dry matter, gross energy (GE), and crude protein (CP) was lower (P < 0.05) in HTS than that in LTS, regardless of the simulated small intestine digestion or large intestine fermentation. The enzymatically unhydrolyzed residue of HTS decreased the accumulative gas production excluding the first 3 h and the short-chain fatty acid concentration including acetic acid, propionic acid, and butyric acid in the fermented solutions (P < 0.05), although it provided more nutrients as fermentation substrates (P < 0.05). In experiment 2, 12 crossbred barrows (25.5 ± 2.5 kg body weight) with a T-cannula inserted in the distal ileum were randomly allotted to two diets (N = 6) to determine nutrient digestibility in the foregut (AID, apparent ileal digestibility) and in the hindgut of pigs (HGD, hindgut disappearance). The study lasted 10 d, with a 5 d adaption to the diets followed by a 3 d collection of feces and then a 2 d collection of ileal digesta. Diets included 96.6% HTS or LTS as the only source of dietary energy and nitrogen. The AID and ATTD of dry matter, GE, and CP in HTS were lower than those in LTS (P < 0.05). There was no difference in HGD of nutrients between LTS and HTS. Eight out of fifteen amino acids in HTS had lower AID values (P < 0.05). In conclusion, HTS provided lower small intestine digestibility of nutrients and lower large intestine fermentation parameters, implying that condensed tannins in sorghum grain may impede the nutrient digestibility in the foregut and limit the fermentability in the hindgut segment of pigs. Hence, digestion and fermentation characteristics of sorghum grain may vary depending on the condensed tannins.
研究领域:
动物营养学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Antioxidants
·
2022
·Vol. 11
·期 4
·772
·
IF 7.675
Jiaman Liu,Yanbiao Chen,Xinxin Zhang,Jie Zheng,Weiying Hu,Bo Teng
The application of hops could be extended to obtain higher commercial values. Tannins from hops were assessed for their tyrosinase inhibition ability, and the associated mechanisms were explored. Nuclear magnetic resonance (NMR) and high-performance liquid chromatography–electrospray ionization–tandem mass spectrometry (HPLC–ESI–MS/MS) revealed that the hop tannins were characterized as condensed tannins with (epi)catechin and (epi)gallocatechin as subunits and an average polymerization degree of 10.32. Tyrosinase inhibition assay indicated that hop tannins had an IC50= 76.52 ± 6.56 μM. Kinetic studies of the inhibition processes indicated the tannins provided inhibition through competitive–uncompetitive mixed reactions. In silico molecule docking showed that tannins were bound to the active site of tyrosinase via hydrogen and electrovalent bonds. Circular dichroism (CD) observed the structural variation in the tyrosinase after reacting with the tannins. Fluorescence quenching analysis and free radical scavenging assays indicated that the tannins had copper ion chelating and antioxidant activities, which may also contribute to inhibition. The intracellular inhibition assay revealed that the melanin was reduced by 34.50% in B16F10 cells. These results indicate that these tannins can be applied as whitening agents in the cosmetics industry.Keywords:hop tannins;polyphenols;condensed tannin;tyrosinase inhibitor;whitening agent
研究领域:
药理学
·
化妆品学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Biomaterials and Tissue Engineering
·
2022
·Vol. 12
·期 12
·2473-2477
·
IF 0.144
Li Min,Xiao Ru,Chen Shaoqing,Wang Cheng,Ni Xinye
Tannic acid (TA), as a common natural catechol derivative, has been widely applied as antibacterial drug or in the construction of carriers for drug delivery with metal ions. However, unlike dopamine, another catechol derivative whose polymerized form of nanoparticles have been successfully
constructed and adopted in various biomedical fields, the development of poly-TA nanoparticles (PTANPs) is rarely reported and the optimization studies are even less. Therefore, the understanding of details and information regarding to the synthesis of PTANPs can provide insights into the
polymerization process of TA and inspire the development of other catechol derivatives based nanoscale platforms for diverse scientific applications. Herein, we used a typical sodium hydroxide (NaOH) triggered polymerization followed by hydrogen peroxide (H2O2) degradation
to prepare PTANPs. In our study, we explored the impact of temperature, weight/volume of reactants (TA, NaOH and H2O2) and reaction time (NaOH and H2O2) on the size of finally obtained PTANPs, which can give guidance and inspiration for future researches
and facilitate the studies of followers.
研究领域:
材料科学
·
药学
·
生物医学工程
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Sijie Liu,Rui Shu,Chen Nie,Yuechun Li,Xing Luo,Yanwei Ji,Xuechi Yin,Jing Sun,Daohong Zhang,Jianlong Wang
Although lateral flow immunoassay (LFIA) as a point-of-care (POC) diagnostic tool has been widely used because of numerous merits, it remains challenging to realize higher sensitivity, easier labeling, and fewer antibodies consumption. Herein, a bioresource-derived tannic acid (TA)-supported immuno-network based LFIA for clenbuterol (CLE) monitoring was proposed by employing poly TA nanospheres (PTAN) as the new tracer. Attributing to the effective protein-enrichment ability of TA, plenty of goat anti-mouse immunoglobulins (GAMI) were first absorbed on the surface of PTAN and then monoclonal antibodies (Ab CLE ) were added to form immuno-network. Compared with directly coupling antibodies, the utilization efficiency of Ab CLE was significantly improved. Thus, the detection sensitivity (take the cut-off value as an example) was enhanced 5-fold and 10-fold at least compared with PTAN-Ab CLE and colloidal gold-based LFIA, respectively. Additionally, the proposed method was successfully verified in beef and pork liver and provided an effective strategy for food safety monitoring.
研究领域:
分析化学
·
食品科学
·
免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Applied Sciences-Basel
·
2021
·Vol. 11
·期 20
·9684
·
IF 2.679
Wei Luo,Huiting Lin,Zhihao Wu,Jingteng Chen,Ruiyang Chi,Xiaoxia Ye,Jie Chen
Plant tannins have the ability to form stable complexes with metal ions, while microporous membranes have low pressure drop and high flux characteristics. Combining these two materials, a new type of tannin-immobilized membrane (M-TAN) adsorption material has been developed. The PA-BWT, PVDF-BWT, CELL -BWT, and PA-AA-BWT were prepared using different types of microporous membranes as substrates, which maintained the porous structure of the membranes and had the characteristics of high flux and fast filtration rate. The surface contact angle and pure water flux analysis showed that the introduction of tannin with multi-phenolic hydroxyl groups increased the hydrophilicity and water flux of the M-TANs. The adsorption performance shows that the adsorption capacity of four kinds of M-TANs for UO22+is in the order of PA-BWT > PA-AA-BWT > PVDF-BWT > CELL-BWT, and PA-BWT has the largest adsorption capacity of 0.398 mmol g−1. In addition, the adsorption isothermal and kinetic data of PA-BWT were well fitted by the Langmuir equation and the Elovich model, respectively. The negative values of ΔG for UO22+adsorption on PA-BWT indicated that adsorption is a spontaneous and favorable process. These facts indicate that PA-BWT can be used as a low-cost adsorbent for effective removal of UO22+from aqueous solutions.Keywords:plant tannins;microporous membranes;immobilized tannins;membrane adsorption
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Jian Zhao,Jiahuan Xu,Lingxi Li,Baoshan Sun
Polymeric polyphenols in different parts (fruits, leaves and calyces) of persimmon ( Diospyros kaki L. cv. Mopan) were characterized via four different degradation methods, followed by HPLC/UPLC-UV/vis, HPLC/UPLC-Q-Exactive-Orbitrap/MS and UPLC-QqQ/MS to obtain comprehensive structural constituent unit information of polymeric polyphenols. The results indicated that persimmon polymeric polyphenols not only consisted of proanthocyanidins as terminal and extension units, but also contained anthocyanidins, flavonols and phenolic acids as terminal units. Among these different fragments detected, (−)-gallocatechin, (−)-gallocatechin-3- O -gallate, (+)-catechin and (+)-catechin-3 -O- gallate as extension units and (−)-epicatechin, (−)-gallocatechin, (−)-epigallocatechin, eight phenolic acids and four flavonols as terminal units were found for the first time in persimmon polymeric polyphenols. The molar percentages of constitutive units of persimmon polymeric polyphenols varied considerably. Compared to polymeric polyphenols in persimmon fruits and calyces, anthocyanidins, flavonols and phenolic acid units with the highest molar percentages were found in polymeric polyphenols in persimmon leaves. In contrast, the mean polymerization degrees of polymeric polyphenols in persimmon fruits, leaves and calyces were 26.45 ± 0.43, 6.23 ± 0.08 and 11.60 ± 0.07, respectively. These findings provide, for the first time, comprehensive structural information on persimmon polymeric polyphenols, and offer valuable insights into their composition and characteristics.
研究领域:
食品科学
·
植物化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2016
·Vol. 8
·期 9
·314
·
IF 2.944
Xiaoma Fei,Fangqiao Zhao,Wei Wei,Jing Luo,Mingqing Chen,Xiaoya Liu
Toughening an epoxy resin by bio-based modifiers without trade-offs in its modulus, mechanical strength, and other properties is still a big challenge. This paper presents an approach to modify epoxy resin with tannic acid (TA) as a bio-based feedstock. Carboxylic acid-modified tannic acid (TA–COOH) was first prepared through a simple esterification between TA and methylhexahydrophthalic anhydride, and then used as a modifier for the epoxy/anhydride curing system. Owing to the chemical modification, TA–COOH could easily disperse in epoxy resin and showed adequate interface interaction between TA–COOH and epoxy matrix, in avoid of phase separation. The use of TA–COOH in different proportions as modifier of epoxy/anhydride thermosets was studied. The results showed that TA–COOH could significantly improve the toughness with a great increase in impact strength under a low loading amount. Moreover, the addition of TA–COOH also simultaneously improved the tensile strength, elongation at break and glass transition temperature. The toughening and reinforcing mechanism was studied by scanning electron microscopy (SEM), dynamic mechanical analysis (DMA) and thermal mechanical analysis (TMA), which should be owned to the synergistic effect of good interface interaction, aromatic structure, decreasing of cross linking density and increasing of free volume. This approach allows us to utilize the renewable tannic acid as an effective modifier for epoxy resin with good mechanical and thermal properties.Keywords:tannic acid;epoxy resin;bio-based;toughening
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Minerals
·
2022
·Vol. 12
·期 8
·996
·
IF 2.818
Yupeng Qian,Xuan Qiu,Tiewei Shen,Yangyang Huai,Bin Chen,Zhen Wang
In the flotation of semi-soluble minerals such as calcite and fluorite, Ca2+is one of the common dissolved components influencing the collector adsorption behaviors on the mineral surfaces. However, there is very limited research focusing on how the dissolved Ca2+affects the separation of fluorite and calcite. In the study, with sodium oleate (NaOL) as a collector and tannic acid (TA) as a depressant, a flotation test, zeta potential measurement, and adsorption experiment in the presence of Ca2+were conducted. Flotation tests indicated that in the presence of Ca2+, fluorite and calcite were both significantly depressed by TA, leading to difficulty in the separation of the two minerals. It was also found that the depression effect on fluorite flotation was minimized with a high concentration of NaOL. Zeta potential measurement and the adsorption experiment results are consistent with the flotation results, revealing that it is only in the low concentration of NaOL that the flotation of fluorite was depressed by TA in the presence of Ca2+. Specifically, in the low concentration of NaOL, TA adsorbed on the fluorite surface and depressed the flotation of fluorite due to the preferential interaction between NaOL and Ca2+in the solution leading to a shortage in the effective NaOL in the solution. In the high concentration of NaOL, the adsorbed TA on the fluorite surface was displaced by the excessive NaOL in the solution; hence, the flotation of fluorite was recovered. In contrast, TA always hinders the interaction of NaOL with calcite regardless of the presence and absence of Ca2+and NaOL, hence, depressing the flotation of calcite. The study presented that a high concentration of NaOL may mitigate the negative effect of Ca2+on the fluorite surface and improve the separation of fluorite from calcite.Keywords:calcium ion;fluorite;adsorption mechanism;tannic acid
研究领域:
矿物学
·
浮选化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2017
·
IF 4.217
Hao Luo,Shengxiao Zhang,Xiaoyan Li,Xia Liu,Qiang Xu,Junshen Liu,Zhenhua Wang
Tannic acid (TA) film covered magnetic microspheres (Fe 3 O 4 @TA–Fe 3+ ) was synthesized and applied for removal of Pb 2+ and Hg 2+ from aqueous solution. The resulted Fe 3 O 4 @TA–Fe 3+ was characterized with thermo-gravimetric analysis, vibrating sample magnetometer, transmission electron microscope, and Fourier transform infrared spectra. The adsorption of pollutants was pH dependent because the complexation of TA with Fe 3+ was disassembled at low pH. The composites showed high maximum adsorption capacity for Pb 2+ up to 1115.3 mg/g and Hg 2+ to 279.4 mg/g. Furthermore, the Fe 3 O 4 @TA–Fe 3+ composites could be easily separated from the solution by a magnet after adsorption because of the excellent superparamagnetic property. Thermodynamics study indicated that the adsorption of Pb 2+ and Hg 2+ on Fe 3 O 4 @TA–Fe 3+ sorbents was spontaneous, chaotic degree decreasing and endothermic process. The present results warrant the promising application of magnetic Fe 3 O 4 @TA–Fe 3+ composites for removal of Pb 2+ and Hg 2+ from contaminated water, and this study is the first application of TA film in environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Fenglei Liu,Shan Hua,Chao Wang,Baowei Hu
Herein, using dialdehyde waste paper (DAWP) as a cross-linking agent to immobilize persimmon tannin (PT) was first used to remove the U(VI) and Cr(VI) via the “waste control by waste” concept. The microscopic and macroscopic surface properties of the as-prepared adsorbent was characterized by the advanced characterization techniques. Factors that affected the elimination process such as variable pH, coexistence ions and equilibrium time were investigated by batch techniques. The results showed that the maximal removal capacities of U(VI) and Cr(VI) on DAWP-PT were 242.3 mg/g (pH = 6.0) and 178.7 mg/g (pH = 2.0) at 298 K, which exhibited competitiveness with most of the reported solid materials. Meanwhile, adsorption data were fitted perfectly to the Langmuir and Pseudo-second-order equations, which indicated that the monolayer and homogenous chemisorption dominated the removal process. The SEM-EDX, DFT and XPS analysis conformed that adsorption of U(VI) was mainly via surface complexation, while the elimination of Cr(VI) was a redox reaction process, and about 65.33% of Cr(III) and 34.67% of Cr(VI) co-existed onto the surface of DAWP-PT. Thus, this study would provide a high-efficiency and low-cost adsorbent for radionuclide and heavy metal treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Shaofeng Yuan,Jian Yang,Xiaoyan Fu,Hang Yu,Yahui Guo,Yunfei Xie,Yuan Xiao,Yuliang Cheng,Weirong Yao
The effect of tannic acid (TA) binding on the thermal degradation of boscalid was studied in this work. The results revealed that TA binding has a significant impact on boscalid degradation. The degradation rate constant of bound boscalid was reduced, and its corresponding half-life was significantly prolonged compared to the free state. Four identical degradation products were detected in both states through UHPLC-Q-TOF-MS, indicating that degradation products were not affected by TA binding. Based on DFT and MS analysis, the degradation pathways of boscalid included hydroxyl substitution of chlorine atoms and cleavage of C N and C C bonds. The toxicity of B2 and B3 exceeded that of boscalid. In summary, the binding of TA and boscalid significantly affected the thermal degradation rate of boscalid while preserving the types of degradation products. This study contributed to a fundamental understanding of the degradation process of bound pesticide residues in complex food matrices.
研究领域:
食品科学
·
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY & BIODIVERSITY
·
2024
·
IF 2.3
Xiaonan Zhang,Xiaocheng Zhuang,Manxin Chen,Jingrong Wang,Zhuoyu Liu,Daxiong Qiu,Jinna Wang,Yan Huang,Weina Li,Zhiwei Liu
Tannic acid and Fe 3+ were used in this study to create a polyphenol–metal network-based composite film for the preservation of Melaleuca bracteata essential oils. The inhibition rate of ABTS and DPPH free radicals reached more than 90 % at an essential oil concentration of 20 mg/mL. Additive quantities of 2.0 % essential oil nano-emulsion, 0.8 % tannic acid/Fe 3+ solution, 0.4 % microcrystalline cellulose, and 1 % chitosan were used to maximize the characteristics of the composite films. When combined with FTIR analysis, X-ray diffraction and scanning electron microscopy revealed that the composite film containing the essential oil emulsion had a more reticulated structure. The essential oil composite layer on mangoes increased the fruit shelf time to 12 days, decreased weight loss by 10.81±4.70 %, increased the amount of soluble solids by 2.03±0.31 %, and increased the amount of vitamin C by 2.18±0.09 %. A trustworthy technical method for the storage and transportation of agricultural goods is offered by this study. Graphical
研究领域:
食品科学
·
植物化学
✓ 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）