31results about How to "Signal strength is stable" patented technology

A mass spectrometer is disclosed comprising a separation device arranged and adapted to emit an eluent over a period of time. The separation device preferably comprises a Capillary Electrophoresis (“CE”) separation device. The mass spectrometer further comprises a nebulizer and a target. Eluent emitted by the separation device is nebulized, in use, by the nebulizer wherein a stream of analyte droplets are directed to impact upon the target so as to ionize the analyte to form a plurality of analyte ions.

There is provided a high-frequency element capable of stabilizing DC bias voltage applied to an electrostatic drive type vibrator and a power supply element capable of supplying a stable DC bias voltage. There is also provided a communication device including a filter using the high-frequency element. The high-frequency element includes a high-frequency signal element having an electrostatic drive type vibrator operated by applying DC bias voltage and a circuit having a function for stabilizing the DC bias voltage and arranged between a pad for supplying the DC bias voltage and the vibrator. The power supply element is used for driving the high-frequency element and includes a circuit having a function for stabilizing the DC bias voltage. The communication device is formed by using a filter using the high-frequency element.

The invention belongs to the field of biotechnology, and relates to a compound amplification system, a kit and an application of rapidly mutating Y chromosome short tandem repeat sequences. The compound amplification system includes 16 pairs of primers, which can simultaneously amplify 16 STR sites: DYS630, DYS464, DYF403S1b, DYF399S1, DYS518, DYF403S1a, DYS527, DYS713, DYS612, DYS626, DYS627, DYS526, DYF404S1, DYF387S1, DYS449, DYS547. Compared with the prior art, the present invention has the following advantages: 1. Contains 16 STRs with high mutation rate of human male Y chromosome, which is unique and novel, with large amount of information and good compatibility. 2. It has wide adaptability, strong directivity and high precision, and is suitable for forensic DNA analysis in all cases involving male cellular evidence. All biological samples containing male cells, such as blood stains, semen spots, saliva, hair, nails, cartilage and other human tissues, can be identified. 3. The system has good specificity and stability. After repeated verifications, no non-specific amplification products are produced, and the signal intensity is stable. 4. High sensitivity, the amount of DNA template as low as 15 pg can be accurately typed.

The invention is based on the use of photoluminescent probes for intracellular sensing of oxygen, especially assaying intracellular oxygen concentration. The photoluminescent probe comprises a suspension of polymeric particles having an average diameter in the 20 nm to 100 nm range, formed from an amphiphilic cationic co-polymer which is oriented in the formed particle to provide a hydrophobic core and a hydrophilic shell. The probe includes a hydrophobic oxygen-sensitive photoluminescent dye such as Pt-tetrakis(pentafluorophenyl)porphine, PtPFPP embedded in the hydrophobic core of the particle, and the co-polymer includes quaternary ammonium groups which provide hydrophilic and cationic character to the particle shell. The photoluminescent probe, which in use is provided in the form of an aqueous suspension of probe, is incubated with live mammalian cells in a suitable growth medium for a period of time to allow the probe particles passively load into the cells. Oxygen can then be sensed by detecting a photoluminescent signal of the photoluminescent probe, which can be correlated with oxygen status, for example oxygen concentration or changes in oxygen concentration / levels, using existing techniques.

In a photoelectric encoder including a scale (14, 16, 18) for making a relative move and an image forming optical system (22, 24), adapted to detect relative displacement of the scale, a transparent protective material (40, 42) having a thickness t equal to or greater than the depth of focus (DOF) of the image forming optical system is disposed on the lattice (15, 17, 19) side surface of the scale. The transparent protective material can be transparent tape 40 bonded to the lattice side surface of the scale or a transparent protective material 42 applied to the lattice side surface of the scale. The surface of the transparent protective material can have hydrophilicity or lipophilicity.