Animal Nutrition
·
2023
·
IF 6.3
Linglian Kong,Yuanli Cai,Xue Pan,Chuanpi Xiao,Zhigang Song
Medium-chain fatty acids and their derivatives are natural ingredients that support immunological functions in animals. The effects of glycerol monolaurate (GML) on intestinal innate immunity and associated molecular mechanisms were investigated using a chicken embryo model. Sixty-four Arbor Acres broiler embryos were randomly allocated into four groups. On embryonic day 17.5, the broiler embryos were administered with 9 mg of GML, which was followed by a 12-h incubation period and a 12-h challenge with 32 μg of lipopolysaccharide (LPS). On embryonic day 18.5, the jejunum and ileum were harvested. Results indicated that GML reversed the LPS-induced decline in villus height and upregulated the expression of mucin 2 ( P < 0.05). GML decreased LPS-induced malondialdehyde production and boosted antioxidant enzyme activity ( P < 0.05). GML alleviated LPS-stimulated intestinal secretion of interleukin (IL)-1β, IL-6, and tumor necrosis factor-α (TNF-α) ( P < 0.05). GML also normalized LPS-induced changes in the gene expression of Toll-like receptor 4, nuclear factor kappa-B p65 ( NF-κB p65 ), cyclooxygenase-2, NOD-like receptor protein 3, IL-18 , zonula occludens 1, and occludin ( P < 0.05). GML enhanced as well the expression of AMP-activated protein kinase α1 and claudin 1 ( P < 0.05). In conclusion, GML improved intestinal morphology and antioxidant status by alleviating inflammatory responses and modulating NF-κB signaling in LPS-challenged broiler embryos.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiwen Tao,Zhengguang Zhang,Zheng Li,Shuangsheng Xiong,Shengmei Wang,Faming Gao,Chen Wang,Li Hou
Potassium-ion batteries (PIBs) have become the desirable alternatives for lithium-ion batteries (LIBs) originating from abundant reserves and appropriate redox potential, while the considerable radius size of K+ leading to poor reaction kinetics and huge volume expansion limits the practical application of PIBs. Hybridization of transition-metal phosphides and carbon substrates can effectively optimize the obstacles of poor conductivity, sluggish kinetics, and huge volume variation. Thus, the peapod-like structural MxPy@BNCNTs (M = Fe, Co, and Ni) composites as anode materials for PIBs were synthesized through a facile strategy. Notably, the unique architecture of B/N codoped carbon nanotube array as fast ion/electron transfer pathways effectively improves the electronic conductivity of composites. The MxPy nanoparticles (NPs) are encapsulated in BNCNTs with an amorphous carbon layer (5–10 nm), which discernibly alleviate the volume changes during potassiation/depotassiation. In conclusion, the composites show a commendable cycling performance, possessing reversible capacities of 111, 152, and 122 mA h g–1 after 1000 cycles at 1.0 A g–1 with a negligible capacity loss for FeP@BNCNT, CoP/Co2P@BNCNT, and Ni2P@BNCNT electrodes, respectively. Especially, after 1000 cycles at 2.0 A g–1, the CoP/Co2P@BNCNT electrode still possesses a capacity of 87.9 mA h g–1, demonstrating excellent rate performance and long-term life. This work may offer an innovative and viable route to construct a stable architecture for solving the issue of poor stability of TMP-based anodes at a high current density.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 37
·50949
·
IF 3.125
Fan Kong,Xueli Jia,Shuting Zhang,Mengqi Lin,Yu Cheng
We have synthesized an amphiphilic block copolymer poly(N-isopropylacrylamide)- b -poly(N-vinylcarbazole) containing 1,8-naphthalimide and spirolactam rhodamine 6G moieties via reversible addition-fragmentation chain transfer radical polymerization. The photoluminescence (PL) spectrum of the poly(N-vinylcarbazole) block well matches the absorption spectrum of the 1,8-naphthalimide moiety and the enhanced emission with a peak at 510 nm from the 1,8-naphthalimide moiety is found in the block copolymer film for excitation at 330 nm. The 560-nm emission from the rhodamine 6G moiety is observed as the block copolymer film sprayed by Britton-Robinson (B-R) buffers or Fe 3+ aqueous solutions for excitation at 330 and 400 nm. The PL intensity at 560 nm is markedly increased for the pH value of the B-R buffer lower than 3.0 or the Fe 3+ concentration in water higher than 5 × 10 −4 M. The 560-nm PL intensity is much higher for the block copolymer film photoexcited at 330 nm than that photoexcited at 400 nm due to double-step resonance energy transfer. The PL intensity ratio of 560 to 510 nm (I 560 /I 510 ) is dependent on the resonance energy transfer from 1,8-naphthalimide to rhodamine 6G, which is sensitive to the concentrations of H + and Fe 3+ ions in water.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Hefeng Yuan,Shumin Wang,Zizai Ma,Manab Kundu,Bin Tang,Jinping Li,Xiaoguang Wang
Developing earth abundant electrocatalyst is imperative to large-scale hydrogen production for transforming current fossil fuel-based economy into future renewable energy economy. In this paper, we report the synthesis of self-supported V O B-Co 3 O 4 /NF nanowire arrays directly grown on Ni foam, which can serve as a trifunctional catalyst for producing hydrogen and oxygen by electrolyzing water in alkaline media or producing hydrogen via hydrolyzing alkaline NaBH 4 solution. The engineered boron and oxygen defects in Co 3 O 4 nanowires prove to effectively modulate their electronic structure leading to the increased electrical conductivity and create a large quantity of electroactive sites. The resulting self-supported V O B-Co 3 O 4 /NF electrode delivers a current density of 50 mA cm −2 at overpotentials of 184 mV for hydrogen evolution reaction (HER) and 315 mV for oxygen evolution reaction (OER) in 1.0 M KOH with excellent stability and durability. The V O B-Co 3 O 4 /NF as both cathode and anode requires 1.67 V to achieve a current density of 10 mA cm −2 for overall water splitting reaction. Besides, V O B-Co 3 O 4 /NF presents much higher hydrogen generation rate (HGR) of 7055 mL min −1 g catalyst −1 with activation energy (E a ) of ca. 29.7 kJ mol −1 . for hydrolytic dehydrogenation of alkaline NaBH 4 solution, outperforming most of the reported non-noble metal-based catalysts and even precious metal catalysts.
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Lanqing Ling,Yu Tu,Xuanyu Long,Qianwen Li,Jiabao Gu,Nan Liu,Zequan Li
The emission of organic dye wastewater poses a great threat to the ecological environment. Therefore, it is necessary to prepare environment-friendly photocatalytic materials with high photocatalytic performance to degrade organic dyes. In this work, a new composite photocatalyst SnS 2 /NH 2 -MIL-125 (Ti) was formed by loading the multiphase SnS 2 of quantum dots (QDs) and hexagonal nanodiscs (NDs) on the NH 2 -MIL-125 (Ti) through one-step hydrothermal method , then used it to remove 40 mg/L Rhodamine B (RhB) under visible light . Compared with SnS 2 and NH 2 -MIL-125 (Ti), the photocatalytic degradation activity of the 12 wt% SnS 2 /NH 2 -MIL-125 (Ti) was enhanced by 2.4 and 2.1 times respectively, reaching 90.5%, after 80 min of visible light irradiation. The four times recycling test shows that this photocatalyst has outstanding stability and durability. Through analysis, NH 2 -MIL-125 (Ti) modified SnS 2 can improve visible light absorption, provide more active sites and inhibit photoelectron-hole recombination, thus enhancing photocatalytic activity . Superoxide radical (•O 2 − ) and hole (h + ) were determined to be the key active substances in the process by the reaction substance capture experiment. The photodegradation mechanism of RhB is also investigated and studied in detail. This novel multiphase SnS 2 /NH 2 -MIL-125 (Ti) material provides a new perspective for the design of organic-inorganic composite photocatalysts with excellent performance and improved stability, and has potential application in environmental purification.
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2020
·
IF 12.35
Shengbo Zhang,Mei Li,Lisheng Li,Fabrice Dushimimana,Jiankang Zhao,Shuai Wang,Jinyu Han,Xinli Zhu,Xiao Liu,Qingfeng Ge,Hua Wang
Regulating electron density at the active site by integrating contributions from multiple channels is an effective strategy to accelerate the reaction rate. Herein, the hydrolysis of ammonia borane (AB) is systematically studied on the NiCu alloy-loaded carbon nitride nanosheets (NixCuy/CNS). The TOF of AB hydrolysis for NiCu/CNS catalyst under visible light irradiation was nearly 3.5 times higher than that in the dark. Photoelectrochemical characterizations indicate that the improved photocatalytic activities originate from a combination of alloying effect, Mott–Schottky junction at the metal–semiconductor interface as well as the localized surface plasmon resonance induced under the visible light irradiation, which synergistically increase the local electron density at the active Ni sites. More importantly, the infrared spectra and isotope labeling-mass spectrometry methods were used to establish the source of hydrogen and unravel the reaction mechanism. It is suggested that the cleavages of B–H and O–H bonds are the initial steps of AB hydrolysis, which lead to the formation of intermediates M–H– (metal and electronegative H– from −BH3) and M–H+ (metal and electropositive H+ from H2O), respectively. The H2 molecule could form through three main paths as (1) two H atoms from −BH3, (2) two H atoms from H2O, and (3) one H atom from −BH3 and another from H2O. Results of density functional theory (DFT) calculations are consistent with the formation of electron-rich Ni sites in the NiCu, and the activation of H2O is a rate-limiting step (RLS). Redistribution of electrons in NiCu significantly enhances the adsorption of AB, the activation of H2O molecules, and the associative desorption of H adatoms as well, which effectively promote the cleavage of B–H and O–H bonds and release of H2. This work gives a systematic mechanistic study on photocatalytic AB hydrolysis involving multichannel electron-transfer pathways, which will provide a powerful guidance for the rational design of active catalysts for AB hydrolysis through multipronged effects.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 10
·1906707
·
IF 11.459
Yunqing Kang,Joel Henzie,Huajun Gu,Jongbeom Na,Amanullah Fatehmulla,Belqes Saeed A. Shamsan,Abdullah M. Aldhafiri,W. Aslam Farooq,Yoshio Bando,Toru Asahi,Bo Jiang,Hexing Li,Yusuke Yamauchi
Selective hydrogenation of nitriles is an industrially relevant synthetic route for the preparation of primary amines. Amorphous metal–boron alloys have a tunable, glass-like structure that generates a high concentration of unsaturated metal surface atoms that serve as active sites in hydrogenation reactions. Here, a method to create nanoparticles composed of mesoporous 3D networks of amorphous nickel–boron (Ni-B) alloy is reported. The hydrogenation of benzyl cyanide to β-phenylethylamine is used as a model reaction to assess catalytic performance. The mesoporous Ni-B alloy spheres have a turnover frequency value of 11.6 h −1 , which outperforms non-porous Ni-B spheres with the same composition. The bottom-up synthesis of mesoporous transition metal–metalloid alloys expands the possible reactions that these metal architectures can perform while simultaneously incorporating more Earth-abundant catalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Qian Zhang,Yan-Ling Yang,Yu-lian Zhou,Jun-ming Hong
This paper presents the use of B and N co-doped reduced graphene oxide (BN-GN) as an electrode for paracetamol electrochemical degradation. The reaction mechanism, focused on active sites in the atom level and dominant radical species generated through the reaction, was analyzed by characterization, density functional theory (DFT) calculation, quenching experiments, and electron paramagnetic resonance analysis. The characterization results indicated that the introduction of N and B functionalities into GN improved catalytic activity due to the generation of new surface defects , active sites, and improvement of conductivity. Results of experiments and DFT showed that co-doping of B and N greatly improved the catalytic activity, and the B atoms in C–N–B groups were identified as main active sites. The main active substances of BN-GN generated in the electrocatalytic oxidation of paracetamol in the solution were O 2 •− and active chlorine. The influence of O 2 •− and active chlorine on the efficiency/path of catalytic oxidation and the proposed mechanism were also determined for paracetamol degradation. This study provides an in-depth understanding of the mechanism of BN-GN catalysis and suggests possibilities for practical applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
·
2021
·Vol. 56
·期 12
·6405-6419
·
IF 3.713
Huishan Shen,Meijuan Xu,Chunyan Su,Bo Zhang,Xiangzhen Ge,Guoquan Zhang,Wenhao Li
Summary The effect of repeated annealing treatment (RANN) and continuous annealing treatment (CANN) on the structure, physicochemical properties and digestibility of wheat B-starch were studied. Annealing degraded the starch molecules, disrupted amylopectin and amylose structures, and decreased the molecular weight and the long chain of amylopectin. Meanwhile, the double helix structure and the crystalline and amorphous region were broken, the starch and water molecules were rearranged after RANN and CANN. As a result, annealing increased the crystallinity, gelatinisation temperature, resistant starch and slowly digestible starch content, while decreased the solubility, swelling power and pasting viscosity. The different changes of structural and physicochemical properties for normal and waxy B-starch upon annealing treatment were because of the different amylose contents and amylopectin chain mobility. The RANN exhibited greater advantages than CANN in the modification of the structural, physicochemical, and digestible properties of normal B-starch; while CANN significantly affected properties of waxy B-starch.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2019
·
IF 5.399
Hui Cao,Petra Högger,Randolph Arroo,Jianbo Xiao
Phosphate buffered saline (PBS) is a commonly used buffer in biological research. Herein, the stability of a series of flavonoids , i.e. myricetin , kaempferol , baicalein , luteolin and quercetin , were assessed in PBS within 5 s. Apigenin proved very stable in PBS and was therefore used as a control. Kaempferol and baicalein were less stable with small amounts of oxidized and hydroxylated products being detected. The other flavonoids were unstable and their dimers were identified in PBS at 4 °C under normal atmospheric conditions. Flavonols with a catechol or pyrogallol substitution pattern on ring B readily formed stable dimers and oxidized products in PBS (pH = 7.4) at 4 °C within 5 s. The chosen experimental conditions improved the stability of dimers and allowed their detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Min Wei,Lei Huang,Shangli Huang,Zhenyu Chen,Dandan Lyu,Xiaoran Zhang,Shuangbao Wang,Zhi Qun Tian,Pei Kang Shen
Improving utilization of precious metals is one of the crucial challenges for electrochemical energy catalysis. Tuning precious metal structure to expose active sites is an effective strategy to reduce mass loading in the practical application. Herein, Pt-Co hollow nanospheres were synthesized via a sequential reduction strategy using amorphous Co-B-O complex as the key spheres-forming intermediates. The modulation mechanism of Pt-Co hollow nanospheres formation was established by investigating critical factors of addition sequence of reducing agent, the type of reducing agents and the ratio of Pt and Co precursors. The optimized Pt-Co hollow nanospheres with the Pt/Co molar ratio of 1:1 by this method is characterized by the average diameter of around 30 nm and the shell thickness of 2.3 nm. They displays superior performance for enhanced hydrogen evolution reaction (HER) in the aspect of activity and stability in 0.5 M H 2 SO 4 , in which the mass activity of the Pt-Co hollow spheres exhibits 2.82 times higher than that of commercial Pt/C and its stability also has a significant enhancement. The outstanding activity of the Pt-Co hollow nanospheres for HER is mainly attributed to its highly accessible electron/mass transport path, expose active sites on the ultra-thin shells and strain effect induced by the hollow sphere structure. This hollow nanospheres with ultra-thin shell provides a promising way to develop highly efficient precious metal based electrocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2019
·Vol. 27
·期 2
·339-345
·
IF 1.947
Zuo Guihong,Wang Anqi,Yang Ying,Huang Hailiang,Wang Fangbiao,Jiang Hongwei,Zhang Lei,Zheng Youjin
Recently, Ag/AgCl has been widely researched by various methods and used as photocatalyst to degrade organic dyes due to its excellent photocatalytic properties under visible light. In this paper, a novel visible-light-driven plasmonic photocatalyst Ag/AgCl@ZIF-8 was successfully prepared by depositing AgCl nanoparticles into the ZIF-8 crystals, and then reducing partial Ag + ions of AgCl nanoparticles to Ag 0 species under UV light irradiation. All as-synthesized samples were characterized by XRD, SEM, TEM, BET and UV–Vis diffuse reflectance spectra. The photocatalytic activity of all as-synthesized samples was evaluated by degradation RhB solution under visible light irradiation. The results show that AgCl nanoparticles are well dispersed and inlaid in the body of ZIF-8 crystals, and partial Ag + ions of AgCl nanoparticles are reduced into Ag 0 species after 30 min of UV light irradiation.The as-synthesized Ag/AgCl@ZIF-8 keeps the high surface area of ZIF-8 and holds the excellent photo-properties of Ag/AgCl. The photocatalytic activity of all as-synthesized sample were evaluated by degradation RhB solution under visible light irradiation. Ag/AgCl@ZIF-8 exhibited the highest photocatalystic activity, which could degrade 99.12% RhB. The synergistic effect of Ag/AgCl and ZIF-8 makes Ag/AgCl@ZIF-8 possible to be used for the degradation of organic dye by using sunlight.
✓ 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）