Erkki Ikonen Helsinki University of Technology Metrology Research Institute P.O. Box 3000 FIN-02015 HUT Finland Abstract. A photometer used for on-line product testing of light-emitting diode (LED) buoy lanterns is calibrated for illuminance responsivity using two different methods. The first method is based on absolute calibration of the photometer with the CIE standard illuminant A light sour...

introduction: the aim of the present study was to investigate the effects of srp assisted by the two clinical treatment methods of diode laser or chlorhexidine gel applications in comparison with srp alone. methods: eight patients with moderate to severe chronic periodontitis, each with at least three pockets 4–7 mm deep, were selected for this study. over 66 pockets were selected and randomly ...

introduction: the aim of this study was to compare the antibacterial efficacy of diode laser 810nm and photodynamic therapy (pdt) in reducing bacterial microflora in endodontic retreatment of teeth with periradicular lesion. methods: in this in vivo clinical trial, 20 patients who needed endodontic retreatment were selected. after conventional chemo mechanical preparation of root canals, microb...

introduction: to improve laser hair removal (lhr) for dark skin, the fluence rate reaching the hair follicle in lhr is important. this paper presents the results of a comparative study examining the function of wavelength on dark skin types using 755 nm alexandrite and 810 nm diode lasers. methods: the structure of the skin was created using a realistic skin model by the advanced systems analys...

This work reports the development of a fast chromatographic methodology for quantitation of two phytoestrogens: daidzein (DAI), and genistein (GEN), in river water samples. The proposed method is based on high performance liquid chromatography-diode array detection (HPLC-DAD) data, and multivariate curve resolution-alternative least square (MCR-ALS) second-order calibration. Initially, the meth...

A simple, rapid, and sensitive HPLC method was developed and validated to quantify Amphotericin B (AmB) in human plasma. AmB was extracted from spiked plasma by simple protein precipitation with methanol. The separation was performed on an XBridgeTM C18 (150 × 4.6 mm, 3.5 μm) column, with a mobile phase of acetic acid (0.73%) – acetonitrile (60:40, v/v) and at a flow rate of 1 mL/min. The elute...

A high-performance liquid chromatography method employing diode array detection was developed to determine levels of the major catechins, proanthocyanidin (procyanidin B2), caffeine, thymoquinone and carvacrol and its isomer, thymol, which are present in different natural complex matrices found in commercial products of Camellia sinensis L. and/or Nigella sativa L. Reversed-phase separation was...

A series of two-way diode array chromatograms were recorded at 0.1±0.5% and 1±5% of 3-hydroxypyridine impurity coeluting with 2-hydroxypyridine, recorded at pH 4.9 (good resolution) and 5.0 (poor resolution). Four methods for PLS calibration, namely, using summed spectral pro®les, summed elution pro®les, unfolded three-way PLS and true three-way PLS were applied to the datasets, both using auto...

An ultra-low-power constant charge injector (CCI) circuit is presented for wirelessly-powered electro-acupuncture (EA). The CCI adopts adaptive pulse-width and frequency-drift (APF) calibration loop that not only accommodates to body impedance variation (BIV) of 100-200k but also is tolerable to frequency-drift. The proposed 5Hz current starving clock generator combined with sub-Vth reference ...

The paper describes the use of a laser range finder and a rotating CCD line camera for scanning and visualizing panoramic (360◦) indoor scenes. The paper describes coordinate systems of both sensors, specifies the fusion of depth and texture data acquired by both sensors, and reports on three different alternatives for visualizing the generated 3D data set. Compared to earlier publications the ...