摘要:
The invention refers to an in vitro method and apparatus for analysing the behaviour of substances in simulated physiological environment. The method comprises the steps of providing a first fluid, a gel matrix and a second fluid, separating the first fluid and the gel matrix by at least one first semi-permeable membrane and separating the gel matrix and the second fluid by at least one second semi-permeable membrane. The method further comprises the steps of injecting a substance into the first fluid, letting the substance migrate from the first fluid through the at least one first semi-permeable membrane, through the gel matrix, through the at least one second semi-permeable membrane and into the second fluid, and determining clearance of the substance from the first fluid.
摘要:
Methods and apparatus for the in vitro modelling of changes that occur on administration of a drug formulation are described, in particular for studying the changes that take place on administration of protein or peptide drug formulations by subcutaneous injection.
摘要:
The invention relates to a method and a device for analyzing nanoparticles, wherein the nanoparticles are first fractionated depending on their particle size and are then analyzed, X-ray small angle scattering being used for the analysis of the nanoparticles. The invention further relates to a corresponding device for carrying out said method. The analysis by X-ray small angle scattering comprises the focusing of X-radiation onto the nanoparticles to be analyzed by means of a slit collimator (44), and analyzing the nanoparticles using a detector/sample distance of less than 50 cm.
摘要:
The invention relates to a method for determining diffusion and/or transfer coefficients of a material having electronic and ionic conductivity. The material is permeable to at least one gas. The aim of the invention is to provide a cost-effective, exact method for determining the diffusion coefficient and the surface transfer coefficient, which requires little time and therefore can be used for screening materials especially for use in the field of permeable membranes. According to the invention, a sample of the material is arranged in a measuring chamber and an electric current flows through it to determine the electric resistance. A gas mixture in which the respective gas is contained is guided through the measuring chamber as a gas flow and the partial pressure of the respective gas in the gas mixture is regularly periodically changed. The change of the electric resistance of the sample is measured and the diffusion and/or transfer coefficient of the material for the respective gas can be determined based on the determined change in electric resistance.
摘要:
The invention relates to a device for microfluidic analyses for a substrate having a planar base surface and cover surface. A chamber (2) having at least two inlets is integrated inside the substrate in order to receive fluid and a semi-permeable or permeable membrane (3) is arranged in the chamber. The chamber is divided into two partial chambers (2a, 2b), which are provided with at least one respective inlet (6, 7), by means of the membrane.
摘要:
Two conductive solid materials with their respective different compositions are joined in parallel with a gravity direction thereof, and then, heated and melted under static magnetic field orthogonal to the gravity direction to form two conductive melts with their respective different compositions. Then, the conductive melts are maintained for a predetermined period of time under the static magnetic field, and cooled and solidified.
摘要:
A method of determining a relationship between a mutual diffusion co-efficient D m and the concentration c of a solute within a solvent. The method comprises: obtaining a Taylorgram (100) comprising a plurality of measurements of solute concentration c; and deriving from the Taylorgram (200) a plurality of mutual diffusion coefficient values D m corresponding with a plurality of different concentrations c of solute in the solvent.
摘要:
Bei einer Vorrichtung zur Messung einer durch Diffusion durch mindestens ein Probenmaterial abgegebenen Menge eines Stoffes für ein Messzellensystem, wobei das mindestens eine Probenmaterial in einem Messzellensystem angeordnet ist, wobei das Messzellensystem mindestens eine, vorzugsweise mehrere Messzellen aufweist, die jeweils einen ersten Behälter, in dem jeweils ein Probenmaterial angeordnet ist, und einen zweiten Behälter aufweisen, wobei der erste Behälter in dem jeweiligen zweiten Behälter angeordnet ist, mit mindestens einem Messkopf, der mindestens eine Messeinrichtung aufweist, ist vorgesehen, dass die Messeinrichtung mindestens eine erste und eine zweite Sensoreinrichtung aufweist, wobei die erste und die zweite Sensoreinrichtung in einem definiertem Abstand zueinander angeordnet sind, wobei die Geometrie und die Abmessungen des Messkopfes derart an zumindest eine Messzelle des Messzellensystems angepasst ist, dass der Messkopf derart auf dem ersten Behälter platzierbar ist, dass die Sensoreinrichtungen jeweils in einem definierten Abstand zu dem Probenmaterial und/oder zu einer im ersten Behälter angeordneten Referenzebene platzierbar sind.
摘要:
A method of estimating a parameter for fitting a multi-component Taylorgram model (603, 604, 605, 606) to Taylorgram data g ( t ) is disclosed. The data (601, 602) comprises a multi-component Taylorgram peak or front at t = t r . The method comprises: evaluating a value of an integration or differential of the data; determining the parameter, based on an analytical expression that includes the value of the integral or differential of the data, the parameter corresponding with a physical property of a sample from which the Taylorgram data was obtained.
摘要翻译:公开了一种估计用于拟合多分量泰勒数据模型(603,604,605,606)到泰勒数据g(t)的参数的方法。 在t = t r时,数据(601,602)包括多分量泰勒图峰或前。 该方法包括:评估数据的积分或差分的值; 基于包含数据的积分或微分值的解析表达式确定参数,该参数对应于获得泰勒数据数据的样本的物理属性。
摘要:
A measurement apparatus is disclosed in which a barrier (2) separates a chamber into a first region (10) and a second region (20). The barrier (50) is of a known thickness (T), and it comprises holes having a known radius (R). Gas flow means provide a flow of a carbon dioxide (12) in the first region (10) and a flow of a nitrogen (22) in the second region (20). A gas detector (28) measures the concentration of carbon dioxide in the second region (20) and a processor (32) calculates the theoretical diffusive flux from one region to another based on the known properties of the through-holes. The processor (32) is arranged to calculate a calibration parameter in order to relate the measured parameter to the theoretical diffusive flux, based on the known properties of the through-holes.