Toemsak Srikhirin

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A recombinant polyester-degrading hydrolase from Thermobifida sp. BCC23166 targeting on aliphatic-aromatic copolyester (rTfH) was produced in Streptomyces rimosus R7. rTfH was expressed by induction with thiostrepton as a C-terminal His(6) fusion from the native gene sequence under the control of tipA promoter and purified from the culture supernatant to(More)
In this article, a novel circuit, which can function both as quadrature oscillator and universal biquad filter (lowpass, highpass and bandpass functions) is introduced. The features of the circuit are that, working as quadrature oscillator, the oscillation condition and oscillation frequency can be adjusted independently with the input bias currents:(More)
In this study, readily available antibodies that are used in standard agglutination tests were evaluated for their use in ABO blood typing by a surface plasmon resonance imaging (SPR imaging) technique. Five groups of antibodies, including mixed clones of anti-A, anti-B, and anti-AB, and single clones of anti-A and anti-B, were used to construct the(More)
An immunosensor based on surface plasmon resonance imaging (SPR imaging) using a specific monoclonal antibody 11E5 (MAb 11E5) was developed for the detection of the seed-borne bacterium Acidovorax avenae subsp. citrulli (Aac), which causes fruit blotch in watermelons and cantaloupes, and compared to the conventional ELISA technique. The 1:40 mixed(More)
A flow-induced cell movement assay combined with a surface plasmon resonance (SPR) technique was developed to quantify the agglutination strength, derived from the standard tube-agglutination test. Red blood cells (RBCs), based on the ABO blood group system, were specifically captured by anti-A and/or anti-B antibodies immobilized on a sensor surface. The(More)
STATEMENT OF PROBLEM Polysiloxane has been used as a coupling material in restorative dental materials for several decades. However, few studies are available on the application of polysiloxane in other dental prosthesis functions. PURPOSE The purpose of this study was to investigate the effects of silane-SiO2 nanocomposite films on Candida albicans(More)
Bacillus sphaericus produces mosquito-larvicidal binary toxin composed of BinA and BinB. While BinB is expected to bind to a specific receptor on the cell membrane, BinA interacts to BinB or BinB receptor complex and translocates into the cytosol to exert its activity via unknown mechanism. To investigate functional roles of aromatic cluster in BinA, amino(More)
OBJECTIVE To evaluate the antimicrobial activities of silver inorganic materials, including silver zeolite (AgZ), silver zirconium phosphate silicate (AgZrPSi) and silver zirconium phosphate (AgZrP), against oral microorganisms. In line with this objective, the morphology and structure of each type of silver based powders were also investigated. METHODS(More)
We introduce and experimentally demonstrate a fiber-connectorized optical system based on the use of a fiber-loop mirror (FLM) to study both the optical transmissivity and the optical phase retardation of a material. Our approach to investigating the optical transmissivity of a test sample is by initially adjusting the optical powers at both FLM output(More)
Recently, a novel class of photoaddressable polymers (PAPs) has been reported, which allows for reversible photorecording with values of the photoinduced birefringence in excess of 0.2. These polymers are copolymers of methacrylate-type monomers with a mesogenic and a nonmesogEnic photoactive azobenzene in the side chain. This report presents a detailed(More)