Abstract:
An instrument determines a concentration of bacteria in a plurality of fluid samples, and comprises a housing, a rotatable platform, a plurality of fluid containers, a light source, a sensor, and a motor. The rotatable platform is within the housing. The fluid containers are located on the rotatable platform. Each fluid container holds a corresponding one of the plurality of fluid samples, and has an input window and an output window. The light source provides an input beam for transmission into the input windows of the fluid containers and through the corresponding fluid samples. The input beam creates a forward-scatter signal associated with the concentration of bacteria. The motor rotates the rotatable platform so that the input beam sequentially passes through each fluid sample. A sensor within the housing detects the forward-scatter signal exiting from the output window associated with the fluid sample receiving the input beam.
Abstract:
In some aspects, a device for apportioning granular samples includes a sample feeder defining a conduit, the conduit including a first opening to receive the granular samples and a second opening. The device includes a shuttle operably coupled to the sample feeder to receive the granular samples from the conduit via the second opening. The shuttle is configured to apportion the granular samples to incrementally enter a sample chamber to be analyzed. The device includes an outlet conduit fluidly coupled to the sample chamber and configured to permit the sample chamber to be evacuated.
Abstract:
Thermally controlled enclosures that can be used with gas analyzers are described. The enclosures incorporate one or more phase changing materials that buffer ambient and internal heat loads to reduce the power consumption demand of mechanical or electronic heating apparatus. Maintenance of gas analyzer equipment at a consistent temperature can be important to achieving stable and reproducible results. Related systems, apparatus, methods, and/or articles are also described.
Abstract:
A fluorescence detection apparatus is provided which comprises a sample holder (4) for holding stationarily sample vessels deployed along a circle line or concentric circle lines having different radiuses, a partition plate (3) connected to a driving means (7) to be rotatable around the center of the circle line or concentric circle lines, optical means (5) for excitation light and optical means (6) for fluorescence light fixed respectively to the partition plate to be rotatable in integration therewith, a first light guide (1) constituted of numerous optical fibers, a photosensor (2), and a light source (8) for generating the excitation light, wherein the partition plate, the optical means for excitation light, and the optical means for fluorescence are integrally rotated, and thereby the fluorescence of the sample arranged along the circle line is successively detected and the detected fluorescence is transmitted to the photosensor. This fluorescence detection apparatus is useful in real-time monitoring of fluorescence signals, and satisfies the requirements of precise temperature control, quick treatment of many samples, high sensitivity, high reliability, low cost, and small size of the apparatus.
Abstract:
L'appareil comporte une pompe (1) pour aspirer le liquide (5), un filtre (3) à deux sorties (8) et (9): la sortie (8) est pour la purge et la sortie (9) est pour le remplissage de la cellule (12). Des mesures interférométriques sont effectuées à une température de 35° à 50 °C (fluctuation 0,2 °C) et à une humidité relative maximale de 0,2 %. Des courbes d'absorbance a(f) sont déterminées par rapport à la matrice puis les concentrations des composantes à doser sont calculées à l'aide des équations étalons.
Abstract:
An apparatus for optical testing of samples is disclosed. The apparatus includes a) apparatus (28) for receiving a plurality of samples to be tested, b) light detection apparatus (20), c) apparatus (32, 42 and 48) defining light paths extending from the plurality of samples to the light detection apparatus and d) apparatus (40 and 56) for exposing the light detection apparatus to light received from individual ones of the plurality of samples along the light paths.
Abstract:
An apparatus for measuring amylose and/or amylopectin content in rice. A near infrared light beam having its wavelength in a range of from about 1900 nm to about 2500 nm is applied to sample rice (5). A detector (26,27,28) receives light reflected from and/or transmitted through the sample rice (5), to generate signals representative of luminous intensity of the received light. A memory device (122) has stored therein content conversion coefficients set for the amylose and/or amylopectin. A calculation device (123) calculates the amylose and/or amylopectin content in the sample rice (5), based on the detecting signals from the detector (26,27,28) and the content conversion coefficients stored in the memory device (122). The calculated content is displayed by a display device (126,127).