In this work the two-photon activity of nanoparticles obtained from a fluorene monomer (M1) and its cross-conjugated polymer (P1) is reported. Aqueous suspensions of M1 and P1 nanoparticles prepared through the reprecipitation method exhibited maximum two-photon absorption (TPA) cross-sections of 84 and 9860 GM (1 GM = 10(-50) cm(4) s) at 740 nm, respectively, and a fluorescence quantum yield o...

CD44 is the major cell surface receptor for the extracellular matrix glycosaminoglycan hyaluronan and is implicated in a variety of biological events that include embryonic morphogenesis, lymphocyte recirculation, inflammation, and tumor metastasis. CD44 delivers activation signals to T lymphocytes, B lymphocytes, natural killer cells, polymorphonuclear leukocytes, and macrophages by stimulatin...

Formation damage has been observed in several oil reservoirs and production equipment in Iranian oil fields. Laboratory and field testing confirmed that the primary cause of damage was the build-up of calcium carbonate, calcium sulfate and strontium sulfate scale either in the perforation tunnels or in the formation sandstone nears the wellbore. Conventional acid treatments could dissolve this ...

Focused ion-beam (FIB) milling is a commonly used technique for transmission electron microscopy (TEM) sample preparation of inorganic materials. In this study, we seek to evaluate the FIB as a TEM preparation tool for human dentin. Two particular problems involving dentin, a structural analog of bone that makes up the bulk of the human tooth, are examined. Firstly, the process of aging is stud...

Stabilization efficiencies of spinel-based construction ceramics incorporating simulated nickel-laden waste sludge were evaluated and the leaching behavior of products investigated. To simulate the process of immobilization, nickel oxide was mixed alternatively with gamma-alumina, kaolinite, and hematite. These tailoring precursors are commonly used to prepare construction ceramics in the build...

A ?-analogue of the superalloy CMSX-4 that does not contain strengthening ??-phase and only consists ?-solid solution nickel has been designed, solidified as single-crystals different orientations, tested under creep conditions in temperature range between 1150 1288 °C. The tests have revealed a very high anisotropy this alloy, was previously found for at supersolvus This could be explained by ...

Cementitious materials are frequently applied in environments which they exposed to acid attack, e.g., sewer systems, biogas plants, and agricultural/food-related industries. Alkali-activated (AAMs) have repeatedly been shown exhibit a remarkably high resistance against attack by organic inorganic acids and, thus, promising candidates for the construction repair of acid-exposed structures. Howe...

The potassium silicate (K-silicate) alteration zone is the main ore contributor in porphyry copper deposits worldwide. Knowledge of element behaviors and mineralization processes essential for an improved understanding mineralization, but they are still not well understood. In this study, we reacted synthetic Cl-rich fluids, containing K, Na, Cu, Mo, Zn, etc., with andesite a complex experiment...

Nanoparticles derived from a group of uniform materials based on organic salts (nanoGUMBOS) are considered promising candidates for protein analysis due to their facile synthesis in aqueous media and high tunability. In this study, phosphonium-erythrosin B-based nanoGUMBOS (i.e., [P4444]2[EB]) was prepared using an ultrasound-assisted reprecipitation method, its ability discriminate quantify pr...

The Atacama Desert, on the western margin of Central Andes, hosts some world's largest porphyry copper deposits (PCDs). Despite a hyperarid climate, many these PCDs have undergone secondary “supergene” enrichment, whereby has been concentrated via groundwater-driven leaching and reprecipitation, yielding supergene profiles containing valuable records weathering landscape evolution. We combine h...