3007-31-6Relevant articles and documents
Preparation of Stable Single-Compartment Vesicles with Cationic and Zwitterionic Amphiphiles Involving Amino Acid Residues
Murakami, Yukito,Nakano, Akio,Ikeda, Hidetsugu
, p. 2137 - 2144 (1982)
Cationic and zwitterionic amphiphiles involving amino acid residues were synthesized as modifications of the phospholipids.Their aggregated structures in both dilute aqueous dispersion and solution were investigated by electron microscopy.Amphiphiles involving an alanine residue or a sarcosine residue, N,N-didodecyl-Nα--L-alaninamide bromide (N+C5Ala2C12), N,N-didodecyl-Nα-hexanoyl>-L-alaninamide bromide (CAC2N+C5Ala2C12), N,N-didodecyl-Nα-sarcosinamide bromide (N+C5Sar2C12), and N,N-didodecyl-Nα-hexanoyl>sarcosinamide bromide (CAC2N+C5Sar2C12), readily form well-developed multiwalled bilayer assemblies (lamellae and vesicles) and stable single-walled vesicles without any additives in dilute aqueous dispersion and sonicated aqueous solution, respectively.On the other hand, those involving one or three leucine residues, N,N-didodecyl-Nα--L-leucinamide bromide (N+C5Leu2C12), N,N-didodecyl-Nα-hexanoyl>-L-leucinamide bromide (CAC2N+C5Leu2C12), and N,N-didodecyl-Nα-α'-α''--L-leucyl>-L-leucyl>-L-leucinamide bromide (N+C5Leu32C12), form partly developed multiwalled bilayer assemblies in aqueous dispersion while stable single- or double-walled vesicles are observable in sonicated aqueous solution.The significance of the tripartite structure in amphiphile assemblies for the formation of stable single-walled bilayer vesicles has been discussed.
MATERIALS COMPRISING CARBON-EMBEDDED COBALT NANOPARTICLES, PROCESSES FOR THEIR MANUFACTURE, AND USE AS HETEROGENEOUS CATALYSTS
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Page/Page column 17; 19, (2021/03/13)
The present invention relates to catalytically active material, comprising grains of non-graphitizing carbon with cobalt nanoparticles dispersed therein, wherein dP, the average diameter of cobalt nanoparticles in the non-graphitizing carbon grains, is in the range of 1 nm to 20 nm, D, the average distance between cobalt nanoparticles in the non-graphitizing carbon grains, is in the range of 2 nm to 150 nm, and ω, the combined total mass fraction of metal in the non-graphitizing carbon grains, is in the range of 30 wt% to 70 wt% of the total mass of the non-graphitizing carbon grains, and wherein dP, D and ω conform to the following relation: 4.5 dP / ω > D ≥ 0.25 dP / ω. The present invention, further, relates to a process for the manufacture of material according to the invention, as well as its use as a catalyst.
Selective Transformations of Triglycerides into Fatty Amines, Amides, and Nitriles by using Heterogeneous Catalysis
Jamil, Md. A. R.,Siddiki, S. M. A. Hakim,Touchy, Abeda Sultana,Rashed, Md. Nurnobi,Poly, Sharmin Sultana,Jing, Yuan,Ting, Kah Wei,Toyao, Takashi,Maeno, Zen,Shimizu, Ken-ichi
, p. 3115 - 3125 (2019/04/26)
The use of triglycerides as an important class of biomass is an effective strategy to realize a more sustainable society. Herein, three heterogeneous catalytic methods are reported for the selective one-pot transformation of triglycerides into value-added chemicals: i) the reductive amination of triglycerides into fatty amines with aqueous NH3 under H2 promoted by ZrO2-supported Pt clusters; ii) the amidation of triglycerides under gaseous NH3 catalyzed by high-silica H-beta (Hβ) zeolite at 180 °C; iii) the Hβ-promoted synthesis of nitriles from triglycerides and gaseous NH3 at 220 °C. These methods are widely applicable to the transformation of various triglycerides (C4–C18 skeletons) into the corresponding amines, amides, and nitriles.