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sn-2棕榈酸甘油酯 1

人乳替代脂 1

定量分析 1

棕榈酸 1

结构甘油三酯 1

酶法合成反应 1

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Inhibition of protein kinase B by Palmitate in the insulin signaling of HepG2 cells and the preventive

XIA Yanzhi, WAN Xuedong, DUAN Qiuhong, HE Shansu, WANG Ximing

《医学前沿（英文）》 2007年第1卷第2期页码 200-206 doi: 10.1007/s11684-007-0038-y

摘要： Elevated plasma levels of free fatty acids (FFAs) may contribute to insulin resistance (IR) that is characteristic of type 2 diabetes mellitus. In this study, we investigated the effects of two fatty acids, palmitate (PA) and arach

关键词： palmitate characteristic study plasma resistance

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Ni-Co alloy catalysts: preparation and performance for aqueous phase hydrodeoxygenation of methyl palmitate

《化学科学与工程前沿（英文）》 2022年第16卷第3期页码 443-460 doi: 10.1007/s11705-021-2079-1

摘要： Carbon-coated Ni, Co and Ni-Co alloy catalysts were prepared by the carbonization of the metal doped resorcinol-formaldehyde resins synthesized by the one-pot extended Stöber method. It was found that the introduction of Co remarkably reduced the carbon microsphere size. The metallic Ni, Co, and Ni-Co alloy particles (mainly 10–12 nm) were uniformly distributed in carbon microspheres. A charge transfer from Ni to Co appeared in the Ni-Co alloy. Compared with those of metallic Ni and Co, the d-band center of the Ni-Co alloy shifted away from and toward the Fermi level, respectively. In the in-situ aqueous phase hydrodeoxygenation of methyl palmitate with methanol as the hydrogen donor at 330 °C, the decarbonylation/decarboxylation pathway dominated on all catalysts. The Ni-Co@C catalysts gave higher activity than the Ni@C and Co@C catalysts, and the yields of n-pentadecane and n-C₆–n-C₁₆ reached 71.6% and 92.6%, respectively. The excellent performance of Ni-Co@C is attributed to the electronic interactions between Ni and Co and the small carbon microspheres. Due to the confinement effect of carbon, the metal particles showed high resistance to sintering under harsh hydrothermal conditions. Catalyst deactivation is due to the carbonaceous deposition, and the regeneration with CO₂ recovered the catalyst reactivity.

关键词： Stöber method carbon-coated Ni-Co alloy in-situ hydrodeoxygenation methyl palmitate decarbonylation/decarboxylation

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Efficient hydrothermal deoxygenation of methyl palmitate to diesel-like hydrocarbons on carbon encapsulated

《化学科学与工程前沿（英文）》 2023年第17卷第2期页码 139-155 doi: 10.1007/s11705-022-2217-4

摘要： Porous carbon-encapsulated Ni and Ni–Sn intermetallic compound catalysts were prepared by the one-pot extended Stöber method followed by carbonization and tested for in-situ hydrothermal deoxygenation of methyl palmitate with methanol as the hydrogen donor. During the catalyst preparation, Sn doping reduces the size of carbon spheres, and the formation of Ni–Sn intermetallic compounds restrain the graphitization, contributing to larger pore volume and pore diameter. Consequently, a more facile mass transfer occurs in carbon-encapsulated Ni–Sn intermetallic compound catalysts than in carbon-encapsulated Ni catalysts. During the in-situ hydrothermal deoxygenation, the synergism between Ni and Sn favors palmitic acid hydrogenation to a highly reactive hexadecanal that easily either decarbonylate to n-pentadecane or is hydrogenated to hexadecanol. At high reaction temperature, hexadecanol undergoes dehydrogenation–decarbonylation, generating n-pentadecane. Also, the C–C bond hydrolysis and methanation are suppressed on Ni–Sn intermetallic compounds, favorable for increasing the carbon yield and reducing the H₂ consumption. The n-pentadecane and n-hexadecane yields reached 88.1% and 92.8% on carbon-encapsulated Ni₃Sn₂ intermetallic compound at 330 °C. After washing and H₂ reduction, the carbon-encapsulated Ni₃Sn₂ intermetallic compound remains stable during three recycling cycles. This is ascribed to the carbon confinement that effectively suppresses the sintering and loss of metal particles under harsh hydrothermal conditions.

关键词： extended Stöber method carbon encapsulated Ni–Sn intermetallic compounds confinement in-situ hydrothermal deoxygenation hydrogenation decarbonylation

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酶法合成sn-2棕榈酸甘油酯的研究进展 Review

韦伟, 孙聪, 王小三, 金青哲, Xuebing Xu, Casimir C. Akoh, 王兴国

《工程（英文）》 2020年第6卷第4期页码 406-414 doi: 10.1016/j.eng.2020.02.008

摘要：

人乳脂（human milk fat, HMF）是婴儿重要的能量和营养来源，甘油三酯（TAG）在人乳脂中的含量约为98%，其具有独特的分子结构。HMF在甘油碳骨架sn-2位的棕榈酸（PA）含量超过70%，而在sn-1,3位高度富集多不饱和脂肪酸。研究表明，HMF中特定的TAG结构在婴儿生长过程中起重要作用。Sn-2棕榈酸甘油酯是一种结构TAG，主要由1,3-二油酸-2-棕榈酸甘油三酯组成，将其添加到婴幼儿配方奶粉中可以模拟HMF的TAG结构。本文综述了过去25年中酶法合成sn-2棕榈酸甘油酯的研究进展及其在实验室条件下的制备流程，重点分析了结构TAG合成过程中所用的商业化sn-1,3位选择性脂肪酶、TAG结构分析的常用方法，以及一些市售sn-2棕榈酸甘油酯产品。另外，本文还对酶法合成sn-2棕榈酸甘油酯的前景进行了展望。

关键词：结构甘油三酯棕榈酸人乳替代脂酶法合成反应 sn-2棕榈酸甘油酯定量分析