Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
This manuscript describes the versatile fabrication and characterization of a novel composite membrane that consists of a porous alumina support, a 100 nm thick nanoporous gold coating, and a selective poly(5-(perfluorohexyl)norbornene) (pNBF6) polymer that can be grown exclusively from the nanoporous gold or througho…
The penultimate reaction in the oxidative degradation of nicotinate (vitamin B(3)) to fumarate in several species of aerobic bacteria is the hydrolytic deamination of maleamate to maleate, catalyzed by maleamate amidohydrolase (NicF). Although it has been considered a model system for bacterial degradation of N-hetero…
Random attachment of sugar molecules to synthetic polymers is an important strategy to induce biodegradability in these polymers. The present study successfully employs “click” chemistry to introduce low levels of sugar molecules onto styrene–butadiene–styrene (SBS) copolymer, a widely used commodity polymer which is…
Undoped and TiO2-doped lead phosphate glasses were prepared. Ultraviolet (UV)–visible and Fourier transform-infrared (IR) absorption spectra of the prepared samples were measured before and after being subjected to doses of 30 and 60 kGy of gamma irradiation. The parent undoped lead phosphate glass reveals charge tran…
Novel optical field-stabilised defect structures are presented in nematic liquid crystals as produced by Laguerre–Gaussian optical beams. Our modelling study is based on the phenomenological free energy approach. To mimic generic experiments, Laguerre–Gaussian optical beams of various helical indices are applied to a…
The new ligand, tris(5-methylpyrazolyl)methane (1), has been prepared by the reaction of n-butyl lithium with tris(pyrazolyl)methane followed by trimethylation of the tetralithiated species with methyl iodide. The BF(4)(-), ClO(4)(-), and BPh(3)CN(-) salts of the Fe(II) complex of this ligand were also synthesized. Th…
Abstract Water-soluble fluorinated polymer nanoparticles (PNPs) with well-defined structure were successfully prepared as a 19F MRI contrast agent by living radical copolymerization of 2,2,3,3-tetrafluoropropyl methacrylate (TFPMA) and tert-butyl methacrylate (tBMA) initiated from a dendritic macroinitiator. The obtai…
Abstract A novel inorganic‐organic hybrid compound, allylammonium hexabromobismuthate(III), (C 3 H 5 NH 3 ) 3 BiBr 6 (ABB), was synthesised and its structure determined by means of single‐crystal X‐ray diffraction studies at four temperatures (280, 230, 170 and 100 K). At 100 K, the compound crystallises in the monocl…
We have measured the dose dependence of the degree of amorphization of titanite, CaTiSiO(5). Titanite is an often metamict mineral which has been considered as a matrix for the encapsulation of radiogenic waste, such as Pu. The amorphous fraction p of geologically irradiated samples (ages between 0.3 and 1 Ga) follows…
Samples of polycrystalline zirconium were irradiated with fast neutrons (E>0.1 MeV) in Pakistan Research Reactor-1 at 423 K to fluences 1.22×1020, 4.87×1020 and 9.70×1020 n/m2. Mechanical properties such as yield stress (YS), ultimate tensile stress (UTS), percentage elongation, stress relaxation rate and hardness of…
The photoprotection of porphyrins is of immense importance for their utilisation in several photo-related applications. In the present study, we have employed gold nanoparticles (AuNPs) to photoprotect a porphyrin, magnesium tetraphenylporphyrin (MgTPP). Absorption, fluorescence and X-ray photoemission spectroscopic (…
The deposition of monosodium urate (MSU) crystals in synovial fluid is a classic clinical symptom of the joint disease gout. In previous work (CrystEngComm, 2011, 13, 1111–1117), it was reported that crystal growth occurs by an island deposition mechanism in 2–10 mM urate solutions under simulated physiologic conditio…
In this paper we have grown pure Ba 0.25 Sr 0.75 TiO 3 (BST) and BST doped by Ferric Oxide Fe 2 O 3 (BFST) with doping variations of 5%, 10%, and 15% above type-p Silicon (100) substrate using the chemical solution deposition (CSD) method with spin coating technique at rotation speed of 3000 rpm, for 30 seconds. BST t…
A high-temperature superconducting (HTS) DC cable system has attracted a great deal of interest from the view point of low loss, dense structure and large capacity compared to HTS AC cable system. It has a HTS cable and a termination. A HTS DC cable system consists of a conductor, cooling system and electrical insulat…
We demonstrate the electrochemical etching of gold in a solution of hydrofluoric acid and dimethylformamide (DMF) to fabricate nanoporous gold (NpAu) films. Compared to de-alloyed NpAu, the electrochemically etched NpAu exhibits controllable pore size and etching depth by adjusting the etching conditions. We propose a…
We consider a theoretical model for a binary mixture of colloidal particles and spherical emulsion droplets. The hard sphere colloids interact via additional short-ranged attraction and long-ranged repulsion. The droplet-colloid interaction is an attractive well at the droplet surface, which induces the Pickering effe…
Novel polyurethanes have been synthesized using aliphatic diisocyanate and aromatic chain extenders with varying spacer length. Nanohybrids of those polyurethanes have been prepared using two-dimensional surface modified nanoclay by dispersing it in poly-ol followed by prepolymerization and subsequent extension with c…
CONTEXT: Emex spinosa (L.) Campd. (Polygonaceae), Leptadenia pyrotechnica (Forsk.) Decne (Asclepiadaceae), Haloxylon salicornicum (Moq.) Bunge ex Bioss. (Chenopodiaceae) and Ochradenus baccatus Delile (Resedaceae) are used in folk medicine for treatment of male sexual disorders. OBJECTIVE: To investigate the effects o…
We simulated the thermoreversible micellization–demicellization process and micellar shuttle of a poly(N-isopropylacrylamide-block-ethylene-oxide) (PNIPAM–PEO) diblock copolymer in a water/ionic-liquid (1-butyl-3-methylimidazolium hexafluorophosphate, [BMIM][PF6]) system by means of dissipative particle dynamics (DPD)…
Crystallization of a Schiff base with nickel acetate in different solvents yields a tetranuclear (dicubane-like [Ni4O4] core with two missing vertices) and a hexanuclear cluster ([Ni6O6] core with two nickel(II) ions attached to a [Ni4O4] cubane through oxygen bridges). Metal centers within these clusters exhibit ferr…