334 results about "Cell volume" patented technology

Method and apparatus for reflected imaging analysis. Reflected imaging is used to perform non-invasive, in vivo analysis of a subject's vascular system. A raw reflected image (110) is normalized with respect to the background to form a corrected reflected image (120). An analysis image (130) is segmented from the corrected reflected image to include a scene of interest for analysis. The method and apparatus can be used to determine such characteristics as the hemoglobin concentration per unit volume of blood, the number of white blood cells per unit volume of blood, a mean cell volume, the number of platelets per unit volume of blood, and the hematocrit. Cross-polarizers can be used to improve visualization of the reflected image.

A biosensor apparatus and method with sample type and cell volume detection. The apparatus includes a sine wave generator to apply an AC signal to a biosensor cell containing a sample, a current-to-voltage converter, a phase shifter, a square wave generator, a synchronous demodulator, and a low pass filter which yields a signal proportional to the effective capacitance across the biosensor cell, which is proportional to the volume of the sample. In addition, the current-to-voltage converter yields a signal indicative of the type of sample contained within the biosensor cell. The method includes applying a sine wave to the biosensor cell, shifting the phase of the resultant signal, generating a square wave synchronous with the sine wave, demodulating the resultant signal with the square wave, and filtering the demodulated signal to produce a signal proportional to the effective capacitance across the biosensor cell. The biosensor apparatus and method are capable of determining sample type and measuring glucose levels over a wide range of sample volumes.

Disclosed are system and method for characterizing a system consisting of a fluid sample on a two sided stage, utilizing data obtained by applying, from both sides thereof, beams of electromagnetic radiation to a fluid coated surface in a containing cell volume. The beams can have the same or different wavelength content and / or polarization state, and can be applied at the same or different magnitude angles-of-incidence, and a third typically unpolarized beam can be applied at a normal angle-of-incidence.

A novel reagent system for use with automated and semi-automated hematology analyzers including an essentially isotonic blood diluting reagent, a blood cell lysing and hemoglobin conversion reagent, and a second lysing reagent for differentiating white blood cells into classes by size and functional characteristics. The diluent reagent enhances properties for counting and sizing blood specimens, while stabilizing cellular volume and cellular integrity for many hours. The blood cell lysing reagent removes red blood cells and enables subsequent enumeration of white blood cells and simultaneous determination of hemoglobin without use of the toxic cyanide anion. The third lysing reagent and a companion quenching differentiates blood cells into classes by size and functional characteristics, based on d.c. impedance volume, conductivity / opacity and light scatter measurements. The companion quenching reagent adjusts pH and conductivity of the final measurement solution to match the analyzer system requirements. Novel methods for use of the reagents with automated and semi-automated hematology analyzers are also provided.< / PTEXT>

A method and apparatus for determining a cell volume of a red blood cell is provided. The method includes the steps of: a) depositing a sample into an analysis chamber, the chamber defined by an first panel interior surface, a second panel interior surface, and a known or determinable height, which height is such that at least one red blood cell subject to a sphering agent assumes a partially compressed spherical shape in contact with the interior surfaces; b) imaging the at least one partially compressed spherical red blood cell contacting the interior surfaces, and producing image signals; c) determining a radius of the partially compressed spherical red blood cell from the image signals; and d) determining a volume of the imaged red blood cell using the determined radius.

Methods and apparatus are disclosed for determining the volume, hemoglobin concentration, maturity and cell shape of mammalian red blood cells in a whole blood sample and simultaneously monitoring system standardization. Methods for distinguishing red blood cells from other cellular particles, prior to the red blood cell analysis are also disclosed. Red blood cells are passed through a beam of light in single file at a selected wavelength, obtaining an initial cytogram by means of the resultant magnitude of one light loss signal and one forward angle light scatter signal at a selected angular interval and a third side angle light scatter or two forward angle light scatter signals at a selected angular intervals and a third side-angle light scatter signal, projecting the cytogram, point by point, onto a pre-calibrated 3-dimensional surface containing grid lines of volume and hemoglobin concentration and determining accurate values of cell volume and hemoglobin concentration.

The invention provides a method for determining the concentration of an analyte in a sample comprising the steps of heating the sample and measuring the concentration of the analyte or the concentration of a species representative thereof in the sample at a predetermined point on a reaction profile by means that are substantially independent of temperature. Also provided is an electrochemical cell comprising a spacer pierced by an aperture which defines a cell wall, a first metal electrode on one side of the spacer extending over one side of the aperture, a second metal electrode on the other side of the spacer extending over the side of the aperture opposite the first electrode, means for admitting a sample to the cell volume defined between the electrodes and the cell wall, and means for heating a sample contained within the cell.

The secondary lithium ion cell opening positive pressure formation method includes the following steps: using the aged cell in which the electrolyte in injected, sealing its electrolyte-injecting hole with adhesive paper, placing said cell on the charging cabinet, using small current to make constant current charge by 0.01-1c, then using 0.05C-10C heavy current to make constant current charge andageing at 30-80 deg.C for 0.5-160 hr. Said method for making cell includes production of positive pole piece anjd negative pole piiece, after aged, it is used for making cell, and can be used for raising cell volume and prolonging service life of cell.

The core panel includes a plurality of carbon foam blocks. One or more of the blocks have a cell volume wherein at least about 90% of the cells have a diameter of between at least about 10 microns and about 150 microns. Also at least about 1% of the cell volume of the block has cells having a diameter of about 0.8 microns to about 3.5 microns.

The present invention provides a multilayer ceramic capacitor and a manufacturing method thereof. The average particle size of the crystal grains mainly composed of barium titanate is 0.2 μm or less, and the product of the lattice constants (a, b, c) obtained from the X-ray diffraction pattern of the crystal grains is expressed. If the volume V of each unit cell is set below 0.0643nm3, a dielectric ceramic with a high dielectric constant can be obtained. A multilayer ceramic capacitor includes a capacitor body formed by alternately laminating dielectric layers made of the dielectric ceramic and internal electrode layers, and external electrodes formed at both ends of the capacitor body.

The invention provides a compound cesium fluoborate, a nonlinear optical crystal with the cesium fluoborate, methods for preparing the compound cesium fluoborate and the nonlinear optical crystal and application of the compound cesium fluoborate and the nonlinear optical crystal. A chemical formula of the compound is CsB<4>O<6>F, the molecular weight of the compound is 291.15, and the compound is of a crystal structure and is prepared by the aid of solid-phase synthesis processes or vacuum packaging processes. A chemical formula of the nonlinear optical crystal is CsB<4>O<6>F, the molecular weight of the nonlinear optical crystal is 291.15, the nonlinear optical crystal belongs to orthorhombic crystal systems, space groups of the nonlinear optical crystal are Pna2<1>, crystal cell parameters of the nonlinear optical crystal include that an a is equal to 7.9241 , a b is equal to 11.3996 , a c is equal to 6.6638 and an alpha, a beta and a gamma are equal to 90 degrees, and the unit cell volumes of the nonlinear optical crystal are 601.95 <3>. Frequency doubling effects of the nonlinear optical crystal is approximately two times frequency doubling effects of KH<2>PO<4> [KDP (potassium dihydrogen phosphate)], and ultrasonic absorption edges of the nonlinear optical crystal are shorter than 190 nm. The nonlinear optical crystal is grown from the CsB<4>O<6>F by the aid of melt processes, high-temperature solution processes, vacuum packaging processes, hydrothermal processes or room-temperature solution processes. The compound cesium fluoborate, the nonlinear optical crystal, the methods and the application have the advantages that the nonlinear optical crystal is free of deliquescence in air, is good in chemical stability and can be applied to all-solid-state laser devices as an ultraviolet nonlinear optical crystal or deep ultraviolet nonlinear optical crystal.

The invention relates to the technology of management of power cells, and discloses a dynamic evaluation method of an SOC of a power cell. Thus, dynamic evaluation of the SOC of the power cell can be simply and precisely achieved. According to the invention, if an open circuit voltage method is used for evaluating the SOC value, certain compensation will be made according to temperature features; the SOC and the Volume after the compensation are used as initial values of the electrification of this time; if the open circuit voltage method is not used, the SOC and the Volume read from the EPPROM are directly used as the initial values of the electrification of this time; then, in the normal charging and discharging states, the current cell volume Volume is acquired according the charging and discharging current Ic, Id based on the ampere hour integration method; in the charging state, the cell volume Volume and the SOC are corrected according to the SOC of the charging curve and the corresponding cell voltage point CVn; and in the discharging state, the cell volume Volume and the SOC are corrected according to the magnitude of the discharging current and the SOC of the discharging curve and the corresponding cell voltage point DVn in the discharging current condition.

The invention relates to a non-linear optical crystal-sodium beryllate borate, a growth method and application thereof. A chemical formula of the sodium beryllate borate is NaBeB3O6, the sodium beryllate borate belongs to an orthorhombic system, a space group is Pna21, cell parameters are that a is equal to 9.1531*, b is equal to 11.9337*, c is equal to 4.3724*, alpha is equal to beta, gamma and 90 DEG, and z is equal to 4, and the unit-cell volume is that V is equal to 477.60*<3>. The frequency multiplication coefficient of the sodium beryllate borate is 1.22 times of that of LiB3O5(LBO). The ultraviolet absorption edge of the sodium beryllate borate is shorter than 190nm. A solid-phase synthesis method is adopted for sintering at high temperature to obtain a NBB compound. A monocrystal can be successfully grown by using a molten salt method and taking Na2O-B2O3 or NaF-B2O3 as a fluxing agent. The NaBeB3O6 has non-linear optical effect, cannot be dissolved into dilute acid, has good chemical stability, can be widely applied in various non-linear optical fields, and can develop the non-linear optical application of deep ultraviolet wavebands.

The invention belongs to the technical field of chemical compound preparation and in particular provides a novel metal organic framework structured compound and a preparation method thereof. The structural formula of the compound is [Zn4(mu4-O)(BTC)2(phen)2].4H2O, wherein mu4 is oxo-bridged; BTC is 1,3,5-trimesic acid (C9H6O6); phen is 1,10-o-phenanthroline (C12H8N2); the molecular formula of the compound is C42H30N4O17Zn4 and the molecular weight is 1124.18; the compound belongs to the monoclinic system and C2 / c space group; the cell parameter beta is 92.353(3) degrees; the cell volume is shown in the specification, Z is 4 and Dc is 1.806g / cm3. In the method, the cheap and nontoxic zinc acetate or zinc chloride is used as the reactant and the organics trimesic acid and o-phenanthroline are used as the ligands to obtain the Zn-MOFs material. The compound has simple preparation process and equipment and high heat stability at the temperature of more than 450 DEG C and can be widely applied to fluorescent organism markers.

A method and apparatus for measuring changes in cell volume generally includes introducing cells into a chamber having a volume between 2 and 100 times the volume of the introduced cell. A first electrically conductive extracellular fluid is introduced into the chamber and a current is applied. The voltage induced by said current flow is measured. The first fluid is exchanged with a second electrically conductive extracellular fluid and a current is applied. The voltage induced by said current flow is measured. The first induced voltage result and the second induced voltage result are used in conjunction with known voltages induced by such current flows to monitor changes in the volume corresponding to fluid flow between the cell and an extracellular fluid.

Provided is a cell packaging material having a layered structure of one or more layers, wherein at least one layer includes a flame retardant, a coating layer imparted with flame resistance, or both. In the cell packaging material, a cell itself does not include any flame resistant film or flame retardant. Therefore, it is possible to provide a cell with flame resistance while not increasing the cell volume or not affecting the cell operation.

Catalytic compositions and processes are disclosed for economical conversions of lower alkane hydrocarbons. Broadly, the present invention discloses solid compositions containing mixed metal oxides that exhibit catalytic activity for ammoxidation of lower alkane hydrocarbons to produce an unsaturated nitrile in high yield. Generally, these solid oxide compositions comprise, as component elements, molybdenum (Mo), vanadium (V) niobium (Nb) and at least one active element selected from the group consisting of the elements having the ability to form positive ions. Mixed metal oxide catalytic compositions advantageously comprise one or more crystalline phases at least one of which phases has predetermined unit cell volume and aspect ratio. Also described are methods for forming the improved catalysts having the desired crystalline structure and ammoxidation processes for conversion of lower alkanes.

The core panel includes a plurality of carbon foam blocks. One or more of the blocks have a cell volume wherein at least about 90% of the cells have a diameter of between at least about 10 microns and about 150 microns. Also at least about 1% of the cell volume of the block has cells having a diameter of about 0.8 microns to about 3.5 microns.

The invention provides a combined type centrifuge tube used for preparation of cytological paraffin block by using trace cast-off cells (less than 1-2 cubic millimeters or below by cell volume). According to the technical scheme, the combined type centrifuge tube for preparation of cytological paraffin block by using trace cast-off cells comprises a special dehydration embedding box and is characterized by further comprising a top tube, a cell mass collecting forming tube and a bottom tube which are all made of transparent material, wherein the top tube is a through tube, the inner and outer diameters of one end of the top tube are closed at the same time and the outer diameter of the top tube is provided with a thread. The combined type centrifuge tube can be operated simply and can completely collect trace cytological samples generated by puncture and the like in suspension liquid and centrifuge the collected samples so that solid phase components are endowed with a standard mode, thereby providing a material for the follow-up work and improving the quality of medical diagnosis.

Improved operating modes of a micro counter-current flame ionization detector (μFID) are demonstrated. By operating the flame inside the end of a capillary gas chromatography (GC) column, the effective cell volume enclosing the flame is considerably reduced and results in significantly lower gas flows being required to produce optimal sensitivity from the stable flame. In a post-column μFID arrangement, a very lean flame is now situated on the end of a stainless steel capillary delivering 10 mL / min of hydrogen, which is opposed by a counter-current flow of only 20 mL / min of oxygen. The μFID detection limit obtained in this stable, oxygen-rich counter-current flame mode is 7×10−11 gC / s with a response that is linear over 6 orders of magnitude. These findings are comparable to those of a conventional FID. Overall, the results indicate that the low-flow sensitive μFID operating modes presented demonstrate that this detector may be potentially useful for further adaptation to portable devices and related GC applications.

The invention discloses a method for efficiently regenerating plant through Hedychium coccineum Buch.-Ham somatic embryogenesis. The method comprises the following steps of: inducing calluses by using immature filaments and anthers of Hedychium coccineum Buch.-Ham as explants, conducting optimization, screening and subculture to obtain high-quality embryonic calluses, conducting suspension culture to the embryonic calluses and establishing an embryonic cell suspension culture system of Hedychium coccineum Buch.-Ham. A great number of somatic embryos can be obtained by using embryonic cell suspension cultures for inducing somatic embryos, an optimum effect can be obtained by using SH inorganic salt and 150mug.L<-1> TDZ, and the somatic embryo generation rate can reach 4429 / ml SCV (settled cell volume); the obtained somatic embryos can germinate seedlings with buds and roots on somatic embryo germination culture medium; and when SH culture medium is used as basic culture medium and the concentration of 6-BA is 0.5-1.0mg.L<-1>, the germination rate of the somatic embryos can reach 100 percent. Due to the method, a foundation is laid for the in-vitro rapid propagation and the biotechnological breeding of Hedychium coccineum Buch.-Ham, the large-scale popularization and application are facilitated and the application prospect is better.

The invention discloses a foliage spraying preparation for promoting fruit setting and fruit swelling and enhancing crop stress resistance. The preparation comprises the ingredients including fulvic acid, DA-6, 2,4-D sodium salt, alpha-pimacol, gibberellin, zeatin, dimethyl sulfoxide, butylcellosolve, sodium tetraborate, zinc sulfate, ferrous sulfate, molybdenum sulfate and magnesium sulfate. After the preparation is sprayed, nutrient substances are rapidly transferred from blade surfaces and are gathered at the plant reproduction active part, and the center endogenous hormones level of fruits is improved; the cell division is promoted, the cell size is amplified, the fruit swelling is accelerated, the chloroplast development and the chlorophyll formation are promoted, the photosynthetic efficiency of leaves is improved, and the unit area yield is increased; the flowing of nutrient substances to female flowers is enhanced, the fruit development speed is accelerated, the uniform fruit development is controlled, the deformity is reduced, the fruit surface is kept fresh, bright and smooth, and the commodity rate is obviously improved; and the immunological competence of plants are excited, the resistance is improved, the occurrence of the pest and disease damage is reduced, the senescence is delayed, and the picking period and the fruit shelf period are prolonged.

The invention relates to an electrical impedance measurement system abnormity detection method based on multi-feature combination and the system thereof. The method comprises the following steps: employing signals of at least two features of the electrical impedance measurement system; calculating characterization parameter of each feature, substituting in a decision function, calculating to obtain a function value; wherein the decision function is a function relative to the characterization parameter of at least two features; comparing the function value and a threshold scope, when the function value is not in the threshold scope, the electrical impedance measurement system is determined as abnormity. According to the provided electrical impedance measurement system abnormity detection method based on multi-feature combination and the system, at least two features of the electrical impedance measurement system are combined for abnormity state detection, alarming sensitivity and accuracy of the electrical impedance measurement system under abnormity can be effectively increased, and the problem of inaccurate measurement of counting value and cell volume due to abnormity of the electrical impedance measurement system can be reduced.

The invention provides a compound rubidium borofluoride and a rubidium borofluoride non-linear optical crystal and a preparation method and use of the rubidium borofluoride non-linear optical crystal. The compound rubidium borofluoride has a chemical formula of RbB4O6F, has molecular weight of 243.71 and is prepared through a solid phase synthesis method or a vacuum packaging method. The crystal has a chemical formula of RbB4O6F, has molecular weight of 243.71, belongs to the orthorhombic system, and has a space group of Pna 21 and cell parameters such as a=7.6742A, b=11.228A, c=6.6218A, alpha=beta=gamma=90 degrees, unit-cell volume of 570.57 A<3>, crystal frequency-doubled effect about 1.9 times that of KH2PO4 (KDP) and ultraviolet absorption edge shorter than 190nm. The crystal is formed through a melt method, a high temperature melt method, a vacuum encapsulation method, a hydrothermal method or a room-temperature solution method. The crystal has good chemical stability and can be used as an ultraviolet and deep-ultraviolet non-linear optical crystal in an all-solid-state laser.

The present invention encompasses a flow-through dispersion device for the dispersion of cell aggregates, the device comprising a first or upstream inlet obstacle and a second or downstream outlet obstacle, each obstacle having at least one traversing hole wherein no two holes align. Between the two obstacles is a turbulence chamber, such that when a cell suspension is passed through the inlet holes, into the chamber and then exits the second obstacle, the turbulence within the chamber disrupts and disperses cell aggregates. The device optionally may have more than two obstacles and turbulence chambers and multiple units may be placed in series to increase the amount of turbulence and time applied to a volume of cells. The invention further encompasses methods of using the device to disperse cell aggregates, and methods of culturing cells that involve seeding cultures and maintaining dispersed individual cells.

An improved FT-ICR Mass Spectrometer has an ion source 10 which generates ions that are transmitted through a series of multipoles 20 to an ion trap 30. Ions are ejected from the trap 30, through a series of lens and multipolar ion guide stages 40–90, and into a measurement cell 100 via an exit / gate lens 110. The measurement cell is mounted in a vacuum chamber 240 and this assembly is slideably moveable into a bore of a superconducting magnet 400 which provides the magnetic filed to cause cyclotron motion of the generated ions in the cell 100. By minimising the distance between the source 10 and cell 100, and by careful alignment of the ion optics, the ions can travel at high energies right up to the front of the measurement cell 100. The cell 100 extends in the longitudinal direction of the magnet bore and is coaxial with that. The ratio of the sectional area of the magnet bore to the sectional area of the cell volume is small (less than 3). The magnet is asymmetric and is relatively short on the ion injection side. The cell 100 is supported from in front of the cell and electrical contact is from the rear thereof.

A lithium ion secondary storage cell consists of electrode core component formed by positive electrode, negative electrode and diaphragm. It features that said component is packaged in metal shell together with nonaqueous cell liquor and metal lithium is packaged in package material of metal shell for raising cell volume and for improving cell storage performance.