In this paper a novel electrochemical sensor based on nickel carbide (Ni3C) nanoparticles as a new modifier was constructed. Ni3C nanoparticle was synthesized and characterized by scanning electron microscopy, X-ray diffraction and first-principles study. Electrochemical impedance spectroscopy (...

Vitamin K1 (VK1) is a natural and lipophilic compound currently used in dermatological formulations. In this work, nanoemulsions containing VK1 have been proposed to overcome some issues associated to semisolid VK1-incorporating formulations. The study has been focused on the design of a lipid-f...

SummaryBackground & aimsVitamin K acts as a coenzyme in the γ-carboxylation of vitamin K-dependent proteins, including coagulation factors, osteocalcin, matrix Gla protein (MGP), and the growth arrest-specific 6 (GAS6) protein. Osteocalcin is a key factor for bone matrix formation. MGP is a loc...

Cultured human lymphocytes were treated with vitamins K1 and B1, potential anticancer agents, either alone or in combination with irinotecan, a semisynthetic analogue of camptothecin. The frequency of sister chromatid exchanges (SCEs) was measured as an indicator of genotoxicity and the prolifer...

Vitamin K1 has recently been identified as a potentially important nutrient for prevention of chronic diseases, especially those associated with aging, like osteoporosis and cardiovascular disease. Currently the majority of Vitamin K1 is produced via chemical synthesis; the aim of this work is t...

Vitamin K1 (phylloquinone) is one of the vitamin Ks. Several studies have previously investigated the role of vitamin K1 status in respect to disease, but without consistent results. Since vitamin K deficiency has been associated with different disease states it is important to develop a biochem...

The effects of polychlorinated biphenyls (PCBs) on human cytochrome P450 aromatase activity in vitro were investigated using a commercially available microsomal fraction obtained from baculovirus infected insects that had been transfected with the human CYP19 gene and cytochrome P450 reductase. ...

Phase-controlled and shape-controlled nickel phosphides were synthesized using nickel chloride, nontoxic red phosphorus and polyvinyl pyrrolidone (PVP). The hexagonal Ni2P and tetragonal Ni12P5 could be transformed via adjusting the amount of polyvinyl pyrrolidone. Besides, the addition of PVP c...

The development of high-efficiency nonprecious electrocatalysts based on inexpensive and earth abundant elements is of great significance for renewable energy technologies. Here, Co-tuned nickel phosphide electrocatalysts have been prepared by a facile co-precipitation, oxidation, and phosphidat...

Metal phosphide structures have been widely explored for electrocatalytic hydrogen evolution reaction (HER) owing to their high activity and durability, and the phosphidation reaction is very important for the preparation of metal phosphides. In this paper, we reported a facile, effective, and p...

Developing high-effectiveness electrocatalysts towards hydrogen evolution reaction (HER) is important for the friendly generation of hydrogen gas on a large scale through electrochemical water splitting. In this study, a hybrid nanostructure based on zinc-nickel phosphide nanosheets vertically g...

Transition metal-doped nickel phosphide nanoparticles with metallic properties are prepared by a simple and facile wet-chemical method. It is shown for the first time that these transition metals: iron, cobalt, manganese, and molybdenum, can atomically substitute nickel in the parent hcp phosphi...

Nickel/Nickel phosphides electrodes are prepared through in-situ reduction of NiSO4 and NaH2PO2 on carbon cloth substrates using square-wave and cyclic voltammetry methods. Nickel/nickel phosphide nanospheres prepared with the pulse deposition procedure exhibits higher activity in the hydrogen e...

SiO2, HZSM-5 and Al2O3 were used to support nickel phosphides to prepare hydrodeoxygenation (HDO) catalysts. The nickel loading was kept at 20 wt% while the Ni/P molar ratio was varied among 3, 2, and 1 in the preparation by incipient wetness impregnation. XRD characterization revealed that Ni3P...

Fast pyrolysis oil is an attractive second-generation bio-fuel. However, due to its high oxygen content, upgrading technologies are necessary to improve the properties of bio-oil. The objective of this work is to evaluate the performance of nickel phosphides supported on carbon-covered alumina (...

Nickel phosphide nanostructures are synthesized by hydrothermal method. The effect of different nickel phosphide phases on structural, morphological, and optical properties as well as photocatalytic performance are investigated. XRD results show that initially, the Ni12P5 phase is formed, then b...

The use of nonprecious metal-based materials as bifunctional electrocatalysts for overall water splitting is of great significance to design and utilize cost-efficient commercial clean energy devices. Herein we report a facile method for the in-situ growth of iron/nickel phosphides hybrid on nic...

Samples of pheromone lures used in boll weevil, Anthonomus grandis (Boheman), eradication programs are routinely analyzed by Gas Chromatography (GC) to ensure lures are adequately dosed with grandlure, the synthetic aggregation pheromone produced by male weevils. However, preparation of GC sampl...

Wittig olefinations of methyl (1S,2R,4R)-N-benzoyl-2-formyl-7-azabicyclo[2.2.1]heptane-1-carboxylate with several phosphoranes and the Horner–Wittig reaction, using methyl diethylphosphonoacetate, have been tested in order to evaluate their utility in the synthesis of β-substituted conformatio...

An O-[2-(methacryloyloxy)-ethylcarbamoyl]-10,11-dihydroquinidine (MQD)-silica hybrid monolithic column was prepared by a facile “one-step” strategy within a 100 μm I.D. capillary. The influence of the methanol, ethylene glycol and water volume ratio, reaction temperature and time, cetyltrimet...