JOURNAL OF THE AMERICAN COLLEGE OF NUTRITION
·
2017
·
IF 2.107
Jinhui Yu,Yong Ma,Jie Sun,Liyuan Ran,Youwei Li,Ning Wang,Tao Yu,Wenting Gao,Wenbin Jia,Rujiao Jiang,Meihua Guo,Yuping Bi,Yingjie Wu
Objective: Dietary n-3 polyunsaturated fatty acids (PUFAs), especially eicosapentaenoic acids (EPA) and docosahexaenoic acid (DHA), are proved to be effective in obesity reduction. Microalgal oil (MO) is an important alternative source of n-3 PUFAs that effectively alleviates obesity. The aim of the present study was to explore the anti-obesity effects of microalgal oil from Schizochytrium sp. (SMO) and to compare the effects of 2 SMOs (SMO1 and SMO2) with different levels of purity of n-3 PUFAs on high fat diet (HFD)-induced obesity in male C57BL/6J mice.Methods: Mice were randomly divided into 5 groups: (1) regular chow (RC); (2) HFD; (3) HFD + fish oil (FO); (4) HFD + SMO1; and (5) HFD + SMO2. Body weight and food intake were weekly monitored. After 16 weeks of treatment, a glucose tolerance test (GTT) and an insulin tolerance test (ITT) were performed. Serum lipid profile, morphological changes in the liver and epididymal white adipose tissue (eWAT), and the mRNA expression of lipid metabolism–related genes were also examined.Results: SMO treatment significantly decreased HFD-induced abdominal fat accumulation, lowered the levels of triglycerides, cholesterol, and low-density lipoprotein, as did the positive control treated with FO. Morphological examination revealed a remarkable reduction in lipid droplet formation in the liver tissue and the particle size of eWAT. An alleviation of inflammation infiltration in eWAT caused by a high-fat diet was also observed. Real-time reverse transcription–polymerase chain reaction analysis examination confirmed that microalgal oil inhibited the gene expression of fatty acid synthase, sterol responsive element-binding protein-1c, and acetyl-CoA carboxylase but promoted that of hormone-sensitive lipase and lipoprotein lipase, carnitine palmitoyltransferase-1, and uncoupling proteins in the liver and eWAT. Moreover, similar anti-obesity effects were obtained with the same dosage but different purity of n-3 PUFAs.Conclusions: As an alternative n-3 PUFAs resource, dietary intake of SMO might be beneficial to prevent HFD-induced abdominal fat accumulation.
研究领域:
营养学
·
肥胖研究
·
分子生物学
·
脂质代谢
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Jiaxiang Luo,Óscar Monroig,Qicun Zhou,Douglas R. Tocher,Ye Yuan,Tingting Zhu,Jingjing Lu,Dongying Song,Lefei Jiao,Min Jin
The quality of crustaceans’ flesh has direct impact on consumers’ purchase choices, with water environment and dietary nutrition being effective ways to regulate flesh quality. The aim of present study was to investigate the impacts of water salinity (low, 4 and medium, 23) and dietary lipid source (fish oil and soybean oil) on nutritional values, texture, taste and odor of flesh of mud crab. While water salinity had no significant influence on nutritional values of crab flesh, crabs fed soybean oil displayed significantly lower contents of amino acids and n-3 PUFAs in muscle. However, crabs reared at low salinity showed reduced flesh hardness, chewiness and gumminess likely related to altered myofiber structure, that impacted muscle texture. Furthermore, low salinity and dietary soybean oil weakened umami taste and aroma characteristics of crab flesh associated with decreased contents of free amino acids, flavor nucleotides, inorganic ions and odor active compounds in flesh.
研究领域:
水产养殖
·
营养学
·
海洋生物学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOORGANIC & MEDICINAL CHEMISTRY
·
2015
·
IF 2.793
Dongmei Zhao,Honglei Xie,Changlin Bai,Chunchi Liu,Chenzhou Hao,Shizhen Zhao,Hongli Yuan,Changqun Luo,Jian Wang,Bin Lin,Jiang Zheng,Maosheng Cheng
A series of N , N -3-phenyl-3-benzylaminopropanamide derivatives were identified as novel CETP (cholesteryl ester transfer protein) inhibitors. In our previous study, lead compound L10 was discovered by pharmacophore-based virtual screening (Dong-Mei Zhao et al., 2014). Based on L10 (IC 50 8.06 μM), compound HL6 (IC 50 10.7 μM) was discovered following systematic structure variation and biological tests. Further optimization of the structure–activity relationship (SAR) resulted in N , N -3-phenyl-3-benzylaminopro panamides derivatives as novel CETP inhibitors. They were synthesized and evaluated against CETP by BODIPY-CE fluorescence assay . Among them, HL16 (IC 50 0.69 μM) was a highly potent CETP inhibitor in vitro. In addition, HL16 exhibited favorable HDL-C enhancement and LDL-C reduction in vivo by hamster. The molecular docking of HL16 into the CETP was performed. The binding mode demonstrated that HL16 occupied the CETP binding site and formed interactions with the key amino acid residues.
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2014
·
IF 2.703
Xudong Nie,Abudurman Adalati,Juan Du,Huanhuan Liu,Shimei Xu,Jide Wang
It is important for montmorillonite (Mt) -based nanocomposites to achieve good intercalation or exfoliation of Mt in composite structure. In this paper, N-[3-(dimethylamino)propyl] methacrylamide (DMAPMA), which is nonionic in neutral solution but cationic character in acid solution, and acrylic acid (AA) were used to modify Mt with AA together. Here DMAPMA and AA were used not only as the intercalators to disperse and intercalate Mt but also as the main monomers to form amphoteric nanocomposite hydrogels. The XRD and TEM results illustrated that an exfoliated or a highly intercalated nanocomposite structure was obtained. Compression strength of amphoteric nanocomposite hydrogel reached 54.4 kPa under the water content of 99.8%. It should be emphasized that the excellent mechanical property of the hydrogels was reached without adding chemical crosslinking agents. Compared with the organic hydrogel, the hydrogels showed significant improvement in swelling capacity.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Food Bioscience
·
2024
·
IF 4.8
Xiaoqiang Zou,Mudassar Hussain,Imad Khan,Yanxi Wang,Bangzhi Jiang,Lei Zheng,Yuechao Pan,Jijie Hu,Azqa Ashraf
Medium- and long-chain structured lipids (MLSLs) rich in docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) were synthesized by acidolysis of fish oil (Omax 1812, a mixture of sardine and anchovy oils) with caprylic acid (CA) using a lipase bio-imprinted with fatty acids as a catalyst. A bio-imprinted lipase for the acidolysis reaction was first prepared under optimal conditions, and its activity was 1.43 times higher than that of the non-bioimprinted. The bio-imprinted lipase was used as a catalyst to produce such MLSLs, and the reaction conditions were optimized. Under the optimal conditions, equilibrium was achieved in 8 h, and the total and the sn -1, 3 CA contents in the obtained product were 28.72% and 42.26%. Additionally, the total and the sn -2 DHA contents were 14.23% and 21.10%, respectively, and the total and the sn -2 EPA contents were 16.43% and 10.14%, respectively. These obtained MLSLs, rich in sn -1, 3 CA, and sn -2 DHA, EPA can deliver significant health benefits.
研究领域:
生物化学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Baiyou Liu,Huayong Luo,Hongwei Rong,Xueyang Zeng,Kelin Wu,Zuhao Chen,Hanxing Lu,Dongchuan Xu
We explore the feasibility of using thermosensitive hydrogels based on copolymers of acrylic acid (AAC) and N-[3-(dimethylamino)propyl] acrylamide (DMAPAA) [P(AAC-co-DMAPAA)] for adsorption and desorption of phosphate in aqueous solutions by a temperature swing. The hydrogels were protonated when they swelled in acidic solution at room temperature, exhibiting good adsorption capacity of phosphate. The phosphate ions were desorbed at high temperature due to the ionic repulsion of carboxyl groups caused by the dissociation of hydrogen bonding. The hydrogels were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The effects of solution pH and temperature on phosphate removal were investigated. Kinetic data revealed that the adsorption of phosphate fitted the pseudo-first-order model. Isotherm data showed that the Freundlich model was more suitable than the Langmuir model. Effective desorption of phosphate was observed by raising the solution temperature to 55°C, and repeated adsorption and desorption behaviors were achieved within three consecutive cycles by a temperature swing between 25°C and 55°C. These findings suggest the possible phosphate removal and recovery from aqueous solutions by changing the environmental temperature.
研究领域:
环境科学
·
高分子化学
·
水处理
·
吸附技术
·
功能材料
✓ 已验证
DOI
高影响因子
AQUACULTURE
·
2013
·
IF 2.009
Cuiying Chen,Baoli Sun,Xiaoxia Li,Peiyu Li,Wutai Guan,Yingzuo Bi,Qing Pan
To quantify the optimum requirement of dietary linolenic acid (18:3n-3, LNA) for Nile tilapia ( Oreochromis niloticus ), purified ethyl linolenate was added to the basal diet to provide the dietary LNA level of 0.00, 0.10, 0.32, 0.63, 0.98, 1.56 and 2.04% of dry weight, respectively. All diets contained similar amounts of 18:2n-6 (0.61% of dry weight) and 18:1n-9 from purified ethyl linoleate and oleate , respectively. Basal diet without LNA was considered as a control. After 2-week acclimation with a lipid-free diet, 4 replicate groups of 120 juvenile fish with initial body weight of 2.10 g were fed with experimental diets in a recirculated fresh water rearing system for 10 weeks. Feeding rate was 10% of body weight in the first 2 weeks, 8% in the following 4 weeks, and then gradually reduced to 5% in the next 4 weeks. Fish were fed three times daily at 8:30, 12:00 and 17:00. The results showed that fish fed the diet with 0.63% of LNA had significantly higher weight gain (WG) and specific growth rate (SGR) than fish fed the control diet ( P < 0.05). Feed efficiency (FE) and protein deposition (PD) in fish fed diets with 0.63, 0.98, 1.56 and 2.04% of LNA were significantly higher than those of the control group ( P < 0.05). Fish muscle fatty acid composition reflected dietary fatty acids. Increasing dietary LNA levels resulted in increased contents of LNA and 22:6n-3, but decreased contents of 20:4n-6 and 20:5n-3. When WG and FE were subjected to broken-line regression analysis, the breakpoint was achieved at dietary LNA levels of 0.45 and 0.64% of dry weight, respectively. Based on those results, the recommended optimum requirement of dietary LNA for juvenile tilapia is 0.45–0.64% of dry weight.
研究领域:
水产养殖学
·
营养学
✓ 已验证
产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2026
·
IF 3.3
Yu Wanquan,Zhang Run,Wang Yujian,Liu Mengxia,Su Jichang,Lv Xuewei,Dang Jie
The high cost of conventional titanium feedstocks has severely constrained the industrial application of Ti–Al-based MAX-phase composites. This work presents a clean, cost-effective pathway for synthesizing Ti 4 Al(C, N) 3 /Al 2 O 3 composites directly from natural ilmenite concentrate. The synthesis encompasses two sequential stages: (i) the reduction and carbonitridation of pre-oxidized ilmenite in a hydrogen-rich atmosphere to yield a Ti(C, N, O) precursor, and (ii) pressureless sintering of the precursor with Al and Ti powders, followed by acid leaching to remove intermetallic byproducts. Through systematic parametric optimization, the precursor synthesis was established at 1150 °C for 70 min in a 4 vol pct CH 4 –80 vol pct H 2 –16 vol pct N 2 atmosphere, achieving a carbonitridation ratio exceeding 90 pct while suppressing detrimental carbon deposition. Subsequent pressureless sintering at 1500 °C for 4 h with a molar ratio of 2.2Ti(C, N, O):2Al:1Ti yielded the target composite. Mechanistic investigation, combining experimental characterization and density functional theory (DFT) calculations, reveals that the Al 3 Ti intermediate phase plays a dual critical role: it promotes deep deoxygenation of Ti(C, N, O) with in situ formation of Al 2 O 3 reinforcements, while simultaneously healing N vacancies in the MAX-phase lattice. Aberration-corrected transmission electron microscopy (AC-TEM) confirmed that the synthesized Ti 4 Al(C, N) 3 solid solution possesses a pristine hexagonal structure identical to that of phase-pure Ti 4 AlN 3 , with no observable lattice distortion or extended defects. This work presents a novel strategy for the economical and sustainable synthesis of high-performance Ti 4 Al(C, N) 3 /Al 2 O 3 composites.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·
IF 13.3
Yue Wu,Tianzhe Zhao,Xiao Shao,Junyu Chen,Tianyong Zhang,Bin Li,Shuang Jiang
Chiral inorganic quasi-2D perovskites are prepared by self-assembling 3D perovskites in solution for the first time. The quasi-2D perovskite synthesized is a pure-phase perovskite with < n > = 3 and is periodically arranged, which is a big breakthrough in quasi-2D inorganic perovskites. With the individual chiral CsPbBr 3 nanocrystals (NCs) assemble into quasi-2D perovskite, the g-factor significantly improved (≈5 × 10 −3 ). In addition, the chiroptical activity of quasi-2D perovskites is explored to be improved with the lateral size increasing. In the first stage of assembly, chiral optical activity is increased due to the lateral size-dependent optical activity, while the changes in the later stages are attributable to the chiral morphology. Interestingly, chirality inversion is found to be correlated to the number of ligands. It is believed that different conformers of chiral ligands caused by steric hindrance of the original ligand oleylamine result in opposite circular dichroism (CD) polarities. The chirality inversion phenomenon is universal, regardless of the choice of ligands. This work opens up a new path for the synthesis of quasi-2D perovskites and provides more opportunities for the modulation of chiral optical activity.
研究领域:
材料科学
·
纳米技术
·
光学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Food Science & Technology
·
2024
·
IF 2.6
Yiting Zhu,Yinghui Feng,Jiawei Wang,Zhaoting Yuan,Yulu Miao,Tingwei Miao,Bei Gao,Lujia Zhang
The synthesis of long-chain n-3 polyunsaturated fatty acid (n-3 PUFA) triacylglycerols (TAGs) via lipase-catalyzed esterification is crucial for optimal human nutrition. However, existing lipases lack selectivity for long-chain n-3 PUFAs, hindering the efficient synthesis of highly polyunsaturated TAGs. By two-dimensional NMR and quantum chemical calculations, polyunsaturated DHA was found to have a unique curved conformation. We rationally designed the lipase MAS1 from marine Streptomyces sp. Strain W007 was based on the bent conformation of DHA, using virtual saturation mutagenesis and binding free energy calculations. Consequently, D150V with more hydrogen bonds and a lower binding free energy to DHA (−28.3820 kcal/mol) was obtained. The esterification selectivity of D150V to DHA was 2.18-fold that of the wild type, whereas its selectivity to behenic acid exhibited minimal improvement. Collectively, our findings present a significant advancement in lipase design for selective long-chain n-3 PUFA esterification, thereby opening avenues for lipase modification and industrial applications.
研究领域:
生物化学
·
酶工程
·
营养科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2016
·
IF 2.74
Dongren Cai,Jinbei Yang,Hairong Da,Ling Li,Hongxing Wang,Ting Qiu
Densities, ρ and viscosities, η of N , N -dimethyl-N-(3-sulfopropyl)cyclohexylammo-nium tosylate ([CyN 1,1 PrSO 3 H][Tos]) with water and methanol were measured, at temperatures from 303.15 K to 328.15 K with 5 K interval and 0.1013 MPa, as a function of [CyN 1,1 PrSO 3 H][Tos] molality (or mass fraction). The isobaric thermal expansion coefficient , molecular volume, standard molar entropy, and lattice energy of the pure IL were obtained based on the density data of pure IL . The apparent molar volume , V φ , infinite dilution apparent molar expansibility, E φ ∞ and energy barrier, E were calculated from the experimental data. The Redlich-Mayer equation was used to evaluate infinite dilution apparent molar volume , V φ ∞ . In addition, viscosities can be described satisfactorily by Vogel-Fulcher-Tammann (VFT) equation. The V φ ∞ values of the IL in water are higher than those in methanol, which suggests that the ion-solvent interactions for [CyN 1,1 PrSO 3 H][Tos] + water binary system are stronger than those for [CyN 1,1 PrSO 3 H][Tos] + methanol. And the energy barrier values decrease with the drop of IL mass fraction in both systems, indicating that the viscosity changes of binary mixtures are more sensitive to the temperature at high composition of the IL.
研究领域:
物理化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
·
2022
·
IF 7.088
Qidong Tang,Ting Peng,Jie Hu,Tao Zhang,Pengqin Chen,Daoxing Chen,Yunjie Wang,Lingfeng Chen,Linjiang Tong,Yi Chen,Hua Xie,Guang Liang
Pan-HER inhibitors exhibit extensive biological activity and offer unique advantages and usually bind to targets in an irreversible manner. Owing to the off-target toxicity of irreversible inhibitors, reversible pan-HER inhibitors are desirable. Herein, we describe the process of N -(ring structure fused phenyl)quinazoline-4-amine-based design, synthesis, and biological evaluation of pan-HER inhibitors in vitro and in vivo . Compound C5 , with the molecular skeleton of N -(3-bromo-1 H -indol-5-yl)-quinazolin-4-amine, displayed irreversible binding just like other effective pan-HER inhibitors. To our surprise, compound C6, which possessed the same skeleton, was found to be a high-strength reversible pan-HER inhibitor. This compound was capable of inhibiting HER1s (such as EGFR T790M/L858R and WT), HER2, and HER4 and can be considered as a breakthrough in the development of pan-HER inhibitors. Altogether, N -(3-bromo-1 H -indol-5-yl)-quinazolin-4-amine can serve as an effective molecular skeleton for developing both reversible and irreversible pan-HER inhibitors in the following discovery of antitumor drugs .
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）