摘要:
An oil-contaminated soil and groundwater treatment system, in which the polluted groundwater pumped into the electrocatalytic device uses a high-voltage electric field to change the structure of water molecules. After high voltage discharge, electrocatalysis and electrolysis, alkaline reduced water, acidic oxidized water and neutral water can be quickly produced. By the oxidation effect of electrocatalytic device anode, chloride ions and dissolved oxygen in water generate hypochlorous acid and superoxide ions, and the interaction between the two generates hydroxyl radicals and microbubbles with high oxidizing ability and long-lasting oxidation, thereby effectively remediating soil and groundwater polluted by total petroleum hydrocarbons.
摘要:
An example approach is provided for providing recommendations to a user based on user's role derived from the context information and an advanced user profile. A recommendation platform processes context information to determine one or more roles associated with a user. Next, the recommendation platform calculates at least one level of similarity between the one or more roles and one or more other roles associated with one or more other users. Then, the recommendation platform determines recommendation information associated with the one or more other users based, at least in part, on the at least one level of similarity. Next, the recommendation platform processes the recommendation information to generate one or more recommendations for the user.
摘要:
Dry mix formulations containing a redispersible polymer powder (RDP) made of a low carboxylation, large particle size water-insoluble film-forming styrene butadiene polymer having at least one ethylenically unsaturated dicarboxylic acid monomer, and a high alumina content cement such as a calcium aluminate cement (CAC) or a calcium sulfoaluminate cement (CSA) provides cement compositions having unexpectedly superior water immersion shear strength and set time for a cement containing tile adhesive (CBTA or CTA), superior adhesion properties in water proofing mortars or mortar applications, and superior flexural and compressive strength in grout applications.
摘要:
A porous ceramic matrix contains a plurality of ceramic particles adhered to each other, and a plurality of channels defined by surfaces of neighboring ceramic particles, the channels each having an average diameter of 0.5-2.5 μm. Preferred ceramics also have a porosity of 25.0-40.0%, a Darcy's Permeability of 1.57-34.8×10−14 m2, and a mechanical strength of 25-64 MPa. Also disclosed is a method of preparing such a porous ceramic matrix, comprising providing a pellet containing ceramic particles that are coated with a monomer, a catalyst, and a binder; polymerizing the monomer in the solid state by heating, then carbonizing and sintering the pellet.
摘要:
A water redispersible polymer powder is produced by drying an aqueous mixture of a thermosettable epoxy resin having a glass transition temperature (Tg) of at least 50° C., and a colloidal stabilizer capable of dispersing the epoxy resin at a temperature above the Tg of the epoxy resin, preferably a polyvinyl alcohol, in an amount of the colloidal stabilizer of at least 2% by weight, based upon the weight of the thermosettable epoxy resin. The RDP may optionally include a hardener or curing agent, and may be hardened, cured, or crosslinked by cement ingredients when admixed with water. The water redispersible polymer powder exhibits unexpectedly superior redispersibility and good stability in cementitious formulations.
摘要:
Cement tile adhesives and methods for using them, the adhesives comprising a dry mix of a water-redispersible polymer powder made from a low carboxylation, large particle size water-soluble film-forming vinyl aromatic-diene copolymer latex and a reduced amount of cellulose ether exhibit superior water immersion shear strength and freeze/thaw shear strength.
摘要:
A uniform electrical field dielectric barrier discharge reactor consists of an electrode unit, a dielectric catalyst container and an insulative housing. Each electrode plate of the electrode unit includes an insulative plane frame structure, and discharge needles evenly distributed on the insulative plane frame structure. The dielectric catalyst container is a hollow solid member internally coated with a metallic catalyst coating layer. The flow directing plate is made of a conducting substrate, having two opposite sides thereof covered by a metallic catalyst coating layer. The invention is practical for use in an air purifier, fluid sterilizer or waste water treatment equipment.
摘要:
A water redispersible polymer powder is produced by drying an aqueous mixture of a low carboxylation, low Tg, large average particle size water insoluble film-forming polymer latex or emulsion and a colloidal stabilizer. The latex polymer may have an average particle size of 2000 Å to 5,000 Å, and an amount of carboxylation of 0.1% to 2.75% by weight of at least one ethylenically unsaturated dicarboxylic acid, salts or mixtures thereof, based upon the weight of the polymer. Dispersions containing the polymer and a polyvinyl alcohol as a colloidal stabilizer exhibit an unexpectedly low viscosity which facilitates spray drying and permits use of high solids content dispersions with low pressure spray drying to increase production efficiency. Cement compositions such as mortars, which contain the redispersible polymer powder exhibit unexpectedly lower rates of viscosity buildup for better workability or troweling, faster set time, and superior heat flow characteristics.
摘要:
The invention provides a method for detecting a propensity toward or risk of developing preeclampsia, comprising detecting in a female subject the presence of a single base pair point mutation, ΔA at position +1754, in the HLA-G mRNA 3′UTR. The mutation is associated with preeclampsic subjects, and with decreased RNA stability in vitro. The presence of this ΔA mutation may provide an explanation for lower levels of HLA-G expression seen in association with preeclampsia.
摘要:
A cleaning stick includes a stick, which has two bulb-like mounting portions at the two opposite ends thereof and a plurality of barbed portions protruded from the periphery adjacent to the bulb-like mounting portions, and two cap-like cleaning tips respectively detachably capped on the bulb-like mounting portions of the stick, each cap-like cleaning tip having a plurality of mounting grooves located on the rear neck thereof and respectively fastened to the barbed portions of the stick.