1820results about How to "Prevent evaporation" patented technology

The invention relates to a device for displacement of at least a small volume of liquid (5) under the effect of an electrical control, including a substrate (1) provided with first electrically conducting means (2), the device also comprising second electrically conducting means (3) arranged facing the first electrically conducting means (2), the first electrically conducting means and the second electrically conducting means possibly being connected to electrical power supply means to enable the application of electrostatic forces to the small liquid volume (5). The second electrically conducting means include at least one conducting wire (3) arranged parallel to the substrate and at a fixed distance from the substrate to enable displacement of the small volume of liquid (5) along said conducting wire (3) under the effect of the applied electrostatic forces.

A multipurpose hemofiltration system (10) and method are disclosed for the removal of fluid and / or soluble waste from the blood of a patient. The system (10) continuously monitors the flow rates of drained fluid, blood, and infusate. When necessary, the pumping rates of the infusate, drained fluid and blood are adjusted to remove a preselected amount of fluid from the blood in a preselected time period. A supervisory controller (160) can monitor patient parameters, such as heart rate (120) and blood pressure (130), and adjust the pumping rates accordingly. The supervisory controller (160) uses fuzzy logic to make expert decisions, based upon a set of supervisory rules, to control each pumping rate to achieve a desired flow rate and to respond to fault conditions. An adaptive controller (162) corrects temporal variations in the flow rate based upon an adaptive law and a control law.

In a device for transporting liquid, liquid to be transported is enclosed by an oil droplet, which is fractionated with air, for manipulation. Moreover, as a method for supplying liquids wherein a plurality of liquids are enclosed by an oil droplet sequentially and treated, liquid enclosed by an oil droplet is formed by associating one oil with one liquid in a liquid introducing section. According to the present invention, even in the case where a plurality of liquids are manipulated, it is possible to manipulate stably without affecting other liquids. Moreover, it is possible to treat as a liquid enclosed by an oil droplet successively in the device for transporting liquid, thereby allowing the invention to be applied to a system for analyzing easily.

Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.

The device enables a second drop to be mixed in a first drop deposited on an electrically insulating layer of an analysis support, in a viscous liquid environment and to mix the resulting drop. The device comprises at least one injector forming the second drop above the first drop. After formation of the second drop, a voltage impulse is applied between a first electrode, arranged under the electrically insulating layer of the analysis support, underneath the first drop, and a second electrode arranged near the outlet orifice of the injector. The voltage impulse fosters the coalescence phenomenon between the two drops, while preventing risks of contamination of the injector by the reagent of the first drop.

Ultra cleaning of combustion gas to near zero concentration of residual contaminants followed by the capture of CO2 is provided. The high removal efficiency of residual contaminants is accomplished by direct contact cooling and scrubbing of the gas with cold water. The temperature of the combustion gas is reduced to 0-20 degrees Celsius to achieve maximum condensation and gas cleaning effect. The CO2 is captured from the cooled and clean flue gas in a CO2 absorber (134) utilizing an ammoniated solution or slurry in the NH3—CO2H2O system. The absorber operates at 0-20 degrees Celsius. Regeneration is accomplished by elevating the pressure and temperature of the CO2-rich solution from the absorber. The CO2 vapor pressure is high and a pressurized CO2 stream, with low concentration of NH3 and water vapor is generated. The high pressure CO2 stream is cooled and washed to recover the ammonia and moisture from the gas.

The present invention provides an analytical element which is free from evaporation of a sample during measurement and therefore capable of quantifying a substrate using a very small amount of sample with high accuracy and which is free from scattering of the sample during and after the measurement and therefore hygienically excellent; and a measuring device and a substrate quantification method using the same. The analytical element comprises a cavity for accommodating a sample, a working electrode and a counter electrode exposed to an inside of the cavity, a reagent layer which comprises at least an oxidoreductase and is formed inside or in the vicinity of the cavity, an opening communicating with the cavity and a member covering the opening.

An antibacterial fluid may be applied to a tubular medical cannula for access to a patient. The fluid comprises a typically metabolizable antibacterial formulation having a viscosity of at least about 5,000 cp. The cannula may then be inserted into the patient with an increased lubricity for a reduction of pain, while at the same time, unlike silicones, preferred materials do not readily accumulate in the patient. The tubular medical cannula may be a rigid, hollow needle, sharp or blunt, a spike, or a flexible catheter. Also, the viscous antibacterial fluid may be used to lock a catheter or other cannula while implanted in the patient, for storage purposes. The formulation is typically an alcohol plus a viscosity increasing agent.

A bipolar, filter press-like electrochemical cell stack comprising a plurality of electrochemical cells, where each electrochemical cell is supplied with a gaseous anodic reactant and either supplied with a gaseous cathodic reactant or produces a gaseous cathodic product, and where each electrochemical cell avoids drying out the ion exchange membrane polymer electrolyte, avoids flooding at the cathode, facilitates recovery of liquid water at the anode, and reduces water losses from at least one of the electrodes. A water retention barrier is variously positioned, such as between a gas diffusion electrode and a fluid flow field. The barrier may be either: (i) a thin, gas permeable, liquid water impermeable membrane; (ii) a thin, porous sheet of material; or (iii) a thin, substantially solid sheet of material except for a plurality of small through-holes that penetrate from one side of the sheet to an opposing side of the same sheet. The barrier is advantageously used at the cathode and facilitates air cooling of the cell.

The invention discloses a lightweight high-performance foam concrete, which is composed of the following components in parts by weight: 50 to 60 parts of cement, 20 to 35 parts of mineral slag, 15 to 20 parts of fly ash, 5 to 10 parts of gypsum, 60 to 80 parts of fine aggregate, 2.7 to 7.3 parts of additive, 0.1 to 0.2 part of fiber, 32 to 45 parts of water, and 5 to 25 parts of foam. The invention also discloses a preparation method of the foam concrete. The foam concrete has the advantages of small volume-weight, high strength, low water absorption, and small contraction rate, and has the waterproof and anti-cracking functions at the same time.

This invention provides a system that allows a user to assemble a chamber apparatus that prohibits samples from leaking or mixing with other samples or chamber array wells, when they are inserted into an array well of the chamber apparatus. In addition, the chamber frame design allows for easy assembly and disassembly for simplified use and slide substrate scanning on conventional microarray scanners. Chamber apparatus includes a chamber frame with an upper integrated gasket and a lower integrated gasket, a substrate, and a substrate frame that positions and captures the substrate. The lower integrated gasket provides a single sealing surface between the chamber frame and the substrate. The upper integrated gasket interfaces with a chamber cover forming a compression seal that prevents sample loss due to evaporation during the hybridization process. The chamber frame and substrate frame have integrated features that allow them to align and fasten to each other by latching or snapping resulting in an optimal clamping force to produce a compression seal between the integrated lower gasket and the substrate.

Two-phase immersion cooling systems can be used to cool electronic components submerged within a dielectric working fluid, but are susceptible to costly losses of working fluid when the cooling systems are opened to allow access to the electronic components for service or replacement. By selectively sealing certain portions of the cooling systems, loss of vaporized working fluid can be reduced.

Oxygen diffusive wound dressings and methods of manufacturing and use are described herein. The wound dressing may generally provide a ready supply of oxygen to a wound being treated via one or more oxygen conduits which are designed to pass oxygen from ambient air or other oxygen reservoirs into proximity to the wound, and may also provide for exudate removal through transecting channels in fluid communication with both the wound surface and a hydrophilic absorbent material.

Disclosed are methods and apparatuses for separating cells using magnets and droplet type cell suspension according to the present invention, which may effectively separate cells by forming droplet type cell suspension with cell suspension sample containing cells to which magnetic beads are coupled and applying magnetic force to the droplet type cell suspension.The apparatus of separating cells according to the present invention includes: a droplet type cell suspension forming part for forming a droplet type cell suspension under a lower part of the droplet type cell suspension forming part with cell suspension sample containing cells to which magnetic beads are coupled; a cell suspension inlet for supplying the droplet type cell suspension forming part with the cell suspension sample; a magnet for applying magnetic force to the droplet type cell suspension; a cell buffer inlet for supplying the droplet type cell suspension with cell buffer; and a temperature maintaining part for maintaining a temperature of the droplet type cell suspension.

The invention relates to a saline-sodic land reclamation and control method. Wide and deep research is long developed on the reclamation of saline-sodic land at home and abroad, and more focuses on engineering measures than applies biological techniques; although achievement has been made, some insurmountable difficulties still exist. The saline-sodic land reclamation and control method comprises the following steps: bulk deep loosening, applying soil deep loosening agents and saline-sodic soil improvement agents to deep loosening soil, purposefully and proportionally applying biologically organic fertilizer according to the composition of soil detected by adopting a nutrient balance method and a nitrogen phosphorus and potassium proportioning method which both comprise the following steps: subtracting soil nutrient-supplying amount from the fertilizer requirement of target yield, supplementing the balance through fertilizing, hathpace ridge forming, draining water and controlling salt, planting green manure-saline alkali tolerant high-yielding grass crop jerusalem artichoke to thoroughly improve the soil.

A volume control pad is provided for use in the socket of an artificial limb. The volume control pad has a core surrounded by a flexible shell. The core includes super absorbent polymer particles which form a gel upon the addition of water thereto. The volume control pad includes a tube for the introduction of water into the core portion of the pad. The volume control pad provides a simple and inexpensive means for adjusting the conformance of the socket around the residual limb from an initial swollen condition to a further point in time in which the swelling has diminished.

Disclosed are methods and apparatuses for separating cells using magnets and droplet type cell suspension according to the present invention, which may effectively separate cells by forming droplet type cell suspension with cell suspension sample containing cells to which magnetic beads are coupled and applying magnetic force to the droplet type cell suspension. The apparatus of separating cells according to the present invention includes: a droplet type cell suspension forming part for forming a droplet type cell suspension under a lower part of the droplet type cell suspension forming part with cell suspension sample containing cells to which magnetic beads are coupled; a cell suspension inlet for supplying the droplet type cell suspension forming part with the cell suspension sample; a magnet for applying magnetic force to the droplet type cell suspension; a cell buffer inlet for supplying the droplet type cell suspension with cell buffer; and a temperature maintaining part for maintaining a temperature of the droplet type cell suspension.

The invention relates to a method for ameliorating a saline and alkaline land, in particular to a method for ameliorating a saline and alkaline land with heavily adhesive soil, which comprises: building raised fields to form a pattern of alternately distributed raised fields and shallow pools; preparing a raised field 1 to make a slope with two inclined sides, applying crushed straw and fermented cow dung on the surfaces of the raised fields, deeply plowing and raking the raised fields flat, wherein the vertical structure of each raised field comprises a bottom water isolating layer, bottom discharge pipes, a top water isolating layer and ridges from bottom up; and pilling sea ice or saline ice in the shallow pools on the surfaces of the raised fields, covering non-woven fabrics or crop straw on the surface of ice piles, and fixing covering materials on the surfaces of the raised fields. The method has the characteristics of high rate of desalination, soil fertility improvement, drought resistance and soil moisture conservation.

The invention relates to multifunction degradable pollutant liquid mulching film and its preparation method. It includes the following steps: using the degradability of the polyvinyl alcohol and starch, the water retention property of the acrylic acid polymer to synthesize starch group polymer; diluting by water to spray for forming. The mulching film has the advantages of convenient using, low cost, preventing water content from evaporating, degradable, wide application range such as agriculture production, forestation etc.

Lithium metal anode protection, and various semi-fuel cell constructions for use in deep, high pressure seawater or air media are provided. The described lithium semi-fuel cells achieve record high energy densities, due to the high energy density of lithium anode and the use of the cathode reactant from the surrounding media, which is not part of the cell weight, and the use of ultralight and flexible packaging materials. These features make the described semi-fuel cells the ideal choice for powering underwater and air vehicles.

The invention provides a tree wound healing protective agent, which consists of the following components in percentage by weight: 0.1-3 percent of sterilizing agent, 35-48 percent of protective agent, 0.1-8 percent of nutrient, 0.1-3 percent of pigment, 30-50 percent of adhesive, 0.1-8 percent of regulator, 1-5 percent of auxiliary agent and 10-26 percent of water. The preparation method comprises the following steps of: adding water into a reaction kettle; adding the nutrient and the regulator with stirring; heating to maintain solution at 45-65 DEG C; stirring for 30-60 minutes; stopping heating and keeping stirring; naturally cooling mixture in the kettle and adding the adhesive and the auxiliary agent; stirring for 70-90 minutes; stopping heating; adding the sterilizing agent and the pigment with stirring; stirring for 30-50 minutes and then adding the protective agent; and then stirring for 90-240 minutes and stopping. The protective agent has a special effective effect on rotten scars, canker scars, gummosis scars, and cut and saw cut of fruit trees.

A method and apparatus for a rapid disruption of cells or viruses using micro magnetic beads and a laser are provided. According to the method and apparatus for a rapid disruption of cells or viruses using micro magnetic beads and a laser, cell lysis within 40 seconds is possible, the apparatus can be miniaturized using a laser diode, a DNA purification step can be directly performed after a disruption of cells or viruses, and a solution containing DNA can be transferred to a subsequent step after cell debris and beads to which inhibitors of a subsequent reaction are attached are removed with an electromagnet. In addition, by means of the cell lysis chip, an evaporation problem is solved, vibrations can be efficiently transferred to cells through magnetic beads, a microfluidics problem on a rough surface is solved by hydrophobically treating the inner surface of the chip, and the cell lysis chip can be applied to LOC.

A disinfecting cap accepts a needleless injection site to apply an antiseptic agent. The cap includes a breakable seal located in a chamber between the proximal and distal portions so as to be spaced away from the opening. The cap body may include a compliant wall that deforms when a needleless injection site is inserted into the opening to removably hold the cap on the needleless injection site. In lieu of a compliant wall, a flexible skirt may extend from the cap body into the proximal portion, so that when a needleless injection site is inserted into the opening, the flexible skirt engages the outer diameter of the needleless injection site to removably hold the cap on the needleless injection site. A carrier strip may be used, wherein each of the plurality of disinfecting caps is removably attached at its proximal end to the carrier strip.

The invention discloses a vertical rotary stereo type multi-layer planting greenhouse, which is characterized in that: the two ends of the stereo greenhouse are provided with strut frame structures; the strut frames are fixed by cross beams of which the two ends are connected; each of the strut frames at the two ends is provided with a transmission gear; a cyclic lifting rotary chain is arranged on the transmission gear; a lifting lug is fixed at the proper distance on the chain; the lifting lug is provided with a cross bar on which a shaft sleeve is designed; the shaft sleeve is connected with a zipper rope respectively; the zipper rope is hung with a planting bed; the transmission gear at one end is connected to an electromotor and a transmission device; and an inverted U-shaped bracket is peripherally provided with a light-transmitting layer and a telescopic curtain uncovering body. The invention solves the problems of saving the planting area and increasing the planting area and has the advantages of simple structure, low material consumption, easy popularization and the like; moreover, the invention can adjust the plant of the planting bed to absorb the sunlight heat and adjust the light source device thereof so as to adjust temperature in the greenhouse and effectively prevent general natural disasters, and is applicable to the planting and cultivation of some plants in different regions.

A retractable writing instrument that substantially prevents writing fluid from evaporating through the tip when the tip is in a retracted position to eliminate the need for a cap. Within the writing instrument is an enclosure member that has a vapor chamber. In the retracted position, the tip of the writing instrument is within the vapor chamber to substantially seal the tip from ambient air so that writing fluid does not evaporate through the tip. The enclosure member has a lip that opens to allow the tip to move forward and extend from the writing instrument so that writing fluid can be delivered to the writing surface for writing. When the tip is moved back into the retracted position the lip closes to substantially seal the tip from the ambient air. An external compression force may be applied to the lip to assist in sealing the lip. The enclosure member may be made of a material that is durable so that the lip does not wear out after many cycles of moving the tip between the retracted and protracted positions, such as silicone, butyl rubber, and thermoplastic vulcanizate (TPV) material including butyl rubber cross-linked with polypropylene.