An attachment is designed such that a concentration measuring apparatus is attachable to and detachable from it. Inside the leading end portion of the attachment, leading ends of two light guide members are provided opposite to each other so as to hold a micro cuvette mounted on the attachment. One light guide member guides light from a light source of the concentration measuring apparatus to subject matter in the micro cuvette while the other guides light from the subject matter to light receiv...

An apparatus and method using a two-serial space sensor (having first and second internal spaces 2,3) for accurately measuring NOx concentration in gas, e.g., exhausted from an internal combustion engine. Both NOx (nitrogen oxide) and oxygen are forced to be partially dissociated in the first space 2 to an oxygen concentration level of 2.times.10.sup.-7 to 2.times.10.sup.-10 atm by pumping out oxygen from the first space 2. The NOx concentration is determined based on the second current measured...

A concentration controlling apparatus is provided for controlling the toner concentration of a developer contained in a developer unit. The developer contains a plurality of components including toner to be transferred to a photosensitive body for forming an electrostatic latent image. The concentration controlling apparatus includes a toner concentration detector for detecting the toner concentration of the developer, a supply determiner for determining a need for toner supply in response to de...

In a gas concentration detecting apparatus, a voltage is applied to electrodes of a sensor element. A change is caused in either the applied voltage or an element current. An amount of a change in each of a current value and a voltage value caused is measured in response to the caused change. An amount of resistance of the sensor element is calculated based on a ratio between the change amounts in the current value and the voltage value. A detection unit detects abnormality relating to controlli...

An apparatus for measuring a glucose concentration is noninvasive, accurate, and compact. The apparatus includes a detection unit (10) and a principal component analysis (PCA) unit (20). The detection unit includes a light source (11) to emit mid-infrared light, an ATR prism (12) to receive the mid-infrared light with a measuring object placed on the ATR prism, and a spectrum detector (13) to detect an absorption spectrum from the mid-infrared light from the ATR prism. The PCA unit includes a lo...

A concentration measuring apparatus includes a vibration member; a shielding unit that limits a flowable area of a solution to be measured close to the vibration member; a vibration control unit that vibrates the vibration member at a frequency; a variation measuring unit that measures a physical variation of the vibration member vibrated; an eigenfrequency computing unit that computes an eigenfrequency of the vibration member in the solution from the frequency and the variation; and a concentra...

A method of determining the concentration of antibiotic in bone comprising crushing the bone, adding a stabilizing agent to the bone, homogenizing the bone in an extraction solvent to obtain a homogenous suspension, and analyzing the suspension supernatant to determine the concentration of antibiotic in bone.

The invention provides a local concentration management system (LCMS) for delivery of highly concentrated therapeutic agent formulations. The LCMS comprises a device comprising an elongate body defining a lumen between its proximal and distal ends, and a diffuser element, a dilutor element, or both. The diffuser element, which is selectively permeable to the agent, is operatively associated with the elongate body so that agent flows through the elongate body, and into and through the diffuser el...

A single-use system for separating blood and producing platelet concentrates includes an elongated container for receiving blood from a patient. The container has a movable plunger mounted within the blood container for expressing blood fractions separated during centrifugation of the container through a first port mounted at one end of said container, a second port mounted on the plunger, and a third port mounted on a plunger rod attached to the plunger.

In a gas concentration measuring apparatus, a measurement substrate is provided. A conductive pattern portion is formed in the measurement substrate. The conductive pattern portion includes a signal input pattern constituting the signal processing circuit and electrically connected to the connection terminal, said signal input pattern having direct current impedance with respect to the connection terminal, said direct current impedance being 10 percent or less of the input impedance of the conne...