Abstract: A method for reducing current ripple at an output of a power supply includes sensing an alternating current (AC) input voltage waveform; determining a correction factor for a switching frequency of the power supply based on the sensed AC input voltage; and applying the correction factor to the switching frequency of the power supply to modify the power supply switching frequency. A modification of the switching frequency synchronizes the switching frequency of the power supply to the AC input voltage waveform.

Abstract: The present disclosure provides complexes comprising: i) a cationic oligosaccharide comprising one or more cationic moieties bonded to a trehalose, a sucrose, or a gluco-n-oligosaccharide moiety, where n is 2-6; ii) a surfactant; and iii) one or more additives selected from: a sterol, a helper lipid, an immunomodulator, and a targeting molecule; and uses thereof.

Abstract: Nowadays, one of the major problems of the oil industry is the presence of large amounts of water and salts, which cannot be efficiently removed by conventional dehydrating polymers. In addition, the acid stimulation operations of petroleum wells cause the chemical degradation of demulsifiers such as polyethers and phenolic resins, reducing drastically their efficiency as water and salt removers. Based on aforementioned, a series of new copolymers has been developed, where the copolymers are combinations of an acrylic and an aminoacrylic monomer and are synthesized by semi-continuous emulsion polymerization (under starved feed conditions), which ensures both the homogeneity of the different chains as well as the randomness of the monomers distribution. The solutions of one of these random copolymers have shown an efficiency similar or superior to combinations of two or three block copolymers (formulations), when they are applied in light or heavy crude oils.

Abstract: The present invention is related to the application of terpolymers based on alkyl acrylates as defoamers of gasified crude oils, with densities between 10 and 40° API. The evaluation of terpolymers based on alkyl acrylates at conditions similar to those of gas-liquid separators has shown that the terpolymers are efficient as inhibitors of the foam formation in heavy and super-heavy crude oil, abating the foam between 15 and 50% faster than in non-dosed crude oil (blank). Even some acrylic terpolymers exhibited a greater efficiency as defoamers than that of commercial silicon-based polymers, which promoting the defoaming only 20-25% faster than the blank collapse. The employ of silicones as defoamers presents serious problems as the formation of deposits and the deactivation of catalysts in the refining processes. This situation has provoked that refineries in Mexico and a worldwide ban the application of this kind of inorganic polymers, and new silicon-free defoaming agents are required.

Abstract: Nowadays, one of the major problems of the oil industry is the presence of large amounts of water and salts, which cannot be efficiently removed by conventional dehydrating polymers. In addition, the acid stimulation operations of petroleum wells cause the chemical degradation of demulsifiers such as polyethers and phenolic resins, reducing drastically their efficiency as water and salt removers. Based on aforementioned, a series of new copolymers has been developed; these copolymers are combinations of an acrylic and an aminoacrylic monomer and they are synthesized by semi-continuous emulsion polymerization (under starved feed conditions), which ensures both the homogeneity of the different chains as well as the randomness of the monomers distribution. The solutions of one of these random copolymers have shown an efficiency similar or superior to combinations of two or three block copolymers (formulations), when they are applied in light or heavy crude oils.

Abstract: Embodiments of the present invention provide for efficient methods and processes for preparing ionic amino acid esters from a specific synthesis route. The disclosed embodiments consist of a single reaction step: reacting a natural or synthetic unprotected amino acid with an aliphatic, branched or aromatic fatty alcohol of even or odd number of carbon atoms from 6 to 20 with or without unsaturation(s), in stoichiometric amounts, in the presence of an organic acid (HX) like carboxylate, mesylate, tosylate or sulfonate, employed as catalyst and under conventional heating (CC) of 1 to 3 hours at a temperature in the range of approximately 60 to 150° C. and pressure the range of approximately 0 to approximately 250 psi; the product obtained is cooled and recrystallized from ethanol.

Abstract: Nowadays, one of the major problems of the oil industry is the presence of large amounts of water and salts, which cannot be efficiently removed by conventional dehydrating polymers. In addition, the acid stimulation operations of petroleum wells cause the chemical degradation of demulsifiers such as polyethers and phenolic resins, reducing drastically their efficiency as water and salt removers. Based on aforementioned, a series of new copolymers has been developed; these copolymers are combinations of an acrylic and an aminoacrylic monomer and they are synthesized by semi-continuous emulsion polymerization (under starved feed conditions), which ensures both the homogeneity of the different chains as well as the randomness of the monomers distribution. The solutions of one of these random copolymers have shown an efficiency similar or superior to combinations of two or three block copolymers (formulations), when they are applied in light or heavy crude oils.

Abstract: The present invention is related to the application of terpolymers based on alkyl acrylates as defoamers of gasified crude oils, with densities between 10 and 40° API. The evaluation of terpolymers based on alkyl acrylates at conditions similar to those of gas-liquid separators has shown that the terpolymers are efficient as inhibitors of the foam formation in heavy and super-heavy crude oil, abating the foam between 15 and 50% faster than in non-dosed crude oil (blank). Even some acrylic terpolymers exhibited a greater efficiency as defoamers than that of commercial silicon-based polymers, which promoting the defoaming only 20-25% faster than the blank collapse. The employ of silicones as defoamers presents serious problems as the formation of deposits and the deactivation of catalysts in the refining processes. This situation has provoked that refineries in Mexico and a worldwide ban the application of this kind of inorganic polymers, and new silicon-free defoaming agents are required.

Abstract: A process allows working with viscous petroleum referred to as “heavy and extra heavy crudes” such as 20 to 6° API by adding an appropriate biosurfactant to an aqueous phase containing a biosurfactant active compound. The surfactant can be alkyl glycosides, glycerol esters and alkyl betaines. The result is the formation of a stable crude/water emulsion even with salt present therein.

Abstract: Embodiments of the present invention provide for efficient methods and processes for preparing ionic amino acid esters from a specific synthesis route. The disclosed embodiments consist of a single reaction step: reacting a natural or synthetic unprotected amino acid with an aliphatic, branched or aromatic fatty alcohol of even or odd number of carbon atoms from 6 to 20 with or without unsaturation(s), in stoichiometric amounts, in the presence of an organic acid (HX) like carboxylate, mesylate, tosylate or sulfonate, employed as catalyst and under conventional heating (CC) of 1 to 3 hours at a temperature in the range of approximately 60 to 150° C. and pressure the range of approximately 0 to approximately 250 psi; the product obtained is cooled and recrystallized from ethanol.

Abstract: A computer-implemented method for monitoring and controlling a controlled space. The method includes partitioning a controlled space into one or more regions; evaluating motion within the controlled space; determining occupancy within the one or more regions. The method may also include adjusting conditions within the controlled space based on whether the controlled space, or a specific region thereof, is occupied. Corresponding devices and systems are also disclosed herein.

Abstract: The present invention provides a process, which allows working with viscous petroleum referred to as “heavy and extra heavy crudes” by adding an appropriate biosurfactant to an aqueous phase containing a biosurfactant active compound. The result is the formation of a stable crude/water emulsion even with salt present therein.

Abstract: An assemblable and disassemblable table formed by a die-cut rectangular sheet of corrugated paper board having pieces removed from its corners and central side areas to leave four pairs of oppositely projecting members, each of which pairs is bisected by first creases for inward folding and to define the table top with further 45 degree angle creasing extending outwardly from the intersections of the first creases. Each member is slotted at its extremity so that, when folded inwardly its slotting registers with the slotting of an adjacent most proximate member, one side of which folds into abutment with it to constitute a table leg when secured by a further slotted rectangular element bent at a 90 degree angle along a bisecting crease line and inserted with its slotting interlocking with the registering slotting of abutting members.