摘要:
A method of non-invasively measuring the presence, absence or concentration of one or more analytes in an ocular element of a subject, the subject including an eye with an ocular surface and a tear layer, includes exposing at least a portion of the tear layer and/or other ocular elements of the subject to electromagnetic radiation without contact with the ocular surface; detecting electromagnetic radiation reflected from the tear layer and/or other ocular elements without contact with the ocular surface; and determining a radiation signature of the reflected electromagnetic radiation to determine the presence, absence or concentration of the one or more analytes in the tear layer and/or other ocular elements of the subject.
摘要:
A vane-type throttle valve assembly including a body having a passage therethrough and a pivotable shaft transverse of the passage and supporting a vane for variably restricting the flow of material through the passage. The shaft is disposed in opposing bores in the valve body. Each bore includes an access slot. The valve is assembled by inserting an integrated shaft and vane into the passage, engaging the ends of the shaft into the access slots, and translating the shaft ends in the access slots until the ends of the shaft are positioned in the bores. The shaft is retained in the bores by bushings inserted from outside the valve body. In a currently preferred embodiment, the access slots are formed over an angle from an axis of the bores, and the shaft ends are entered into the bores by rotating the shaft and vane about the passage axis.
摘要:
DNA involved in the bacterial gene expression of carbapenem antibiotics comprising: a) at least one of the genes carA, carB, carC, carD, carE, carF, carG, carH, b) DNA capable of hybridizing to any of the genes defined in a) and capable of functioning as such genes in the biosynthetic pathway of a carbapenem, c) DNA which is a) or b) above by virtue of the degeneracy of the genetic code. Polypeptides encoded by such DNA.
摘要:
A compound having formula (1) for use as a medicament wherein n is 2 or 3; Y is O, S or NH; X is O, S or NH; and R is C.sub.1 -C.sub.18 alkyl or acyl which may be substituted. ##STR1##
摘要:
An air bearing gauge 10 is characterized by a flat land 30, instead of the prior art's "knife-edge" 30', so as to provide an area 32 over web 12 through which pressurized gas flows in escaping from the gas supply means 16 and the gas bearing region 24. The land 30 provides an upward scaling of the readings obtained on-line, which can correlate the reading to standard TAPPI caliper gauge measurements of sheets as are obtained off-line, in the laboratory.
摘要:
For measuring a property such as caliper of a traveling sheet, a sensor body and a target body are located on opposite sides of the sheet and constrained (e.g., by gas bearings) along a sensor path intersecting the path of the sheet. Gas bearings maintain these bodies at, substantially constant distances from the opposite surfaces of the sheet while permitting them to move in response to the position and thickness of the sheet. An active sensor element aboard the sensor body and a passive sensor element aboard the target body interact through the sheet to produce aboard the sensor body a response dependent on the sheet property. Manifestations of this response, such as light beam modulations, are produced, without solid bodily connections, at a location spaced from the sensor body where the manifestations are detected to produce a sheet property-indicative signal.
摘要:
Apparatus is provided for sensing a property of a sheet (18). A sensor element (32) is adapted to be placed alongside the sheet path, and a base member (34) is adapted to be positioned on one side of the sheet and in sliding contact with one surface thereof. The sensor element is enabled to produce a sheet property sensing interaction with the sheet in a limited region of the sheet path, the interaction region being movable to any one of a plurality of sensing locations spaced across the width of the sheet. The base member has a pair of groove portions (44, 46) forming gas conducting channels with open sides exposed to the sheet surface in contact with the base member. Each of the groove portions has a part (40, 40A) extending upstream of the interaction region. The groove portions diverge from each other as they extend in a downstream (20) direction. A source of subambient gas pressure communicates with the groove portions for reducing the gas pressure therein so that the contacting surface of the sheet is at least nominally depressed into the groove portions to such an extent that the divergence of the grooves and the longitudinal movement of the sheet exert thereon a transverse tension. This tension is sufficient to substantially smooth out longitudinally extending sheet wrinkles. Typically a plurality of gas removal devices are provided for minimizing the introduction of gas between the base member and the sheet.
摘要:
Methods and apparatus are provided for gauging the thickness or other property of a plastic film such as blown film or other material having a front side, a back side, and characteristics including a substantial transparency to radiation at a reference wavelength and a degree of transparency depending on the value of the property at an absorption wavelength. These methods and apparatus provide a useful measurement of the material property in the presence or absence of detrimental effects such as those caused by a broadband absorbing substance (e.g. carbon black) or scattering substance (e.g. TiO.sub.2) in the material, or variations in the apparent reflectivity of one or both of the surfaces on the front and back sides, as a result, for example, of the minute surface irregularities in high-density polyethylene. Radiations, typically infrared radiations at the reference and absorption wavelengths, are directed into the front side of the material, and reflected radiations including the reference and absorption wavelengths are detected from the front side at the specular reflection angle. From the detected radiations there is produced an instrument response wherein the effects of the reference and absorption wavelengths reflected from the front side have been selectively subdued, whereby the response is indicative of the value of the property primarily as a function of the reference and absorption wavelengths reflected from the back side of the material. Typically the method is performed by additionally directing into the front side of the material a third wavelength, (e.g. 3.43 microns) to which the material exhibits a substantial opacity, additionally detecting from the front side at the specular reflection angle reflected third wavelength radiation, and producing the response so that the principal effects therein of the reference and absorption wavelengths reflected from the front side are cancelled by the effect of the third wavelength. Typically the method includes directing into the front side of the material a second reference wavelength of radiation, detecting the reflected second wavelength from the front side at the specular reflection angle, and producing from the detected first and second reference wavelengths a composite reference component of the instrument response, derived in accordance with a function which relates the relative intensities of the reflected first and second reference wavelengths to the differences in wavelength among the absorption and first and second reference wavelengths.
摘要:
Methods for spectroscopic analysis of biological tissues to classify an individual as diabetic or non-diabetic, or to determine the probability, progression or level of a disease or medical condition in an individual.
摘要:
Apparatus and methods for spectroscopic analysis of biological tissues to classify an individual as diabetic or non-diabetic, or to determine the probability, progression or level of a disease or medical condition in an individual.