yrammuS 要概83Nutthita CHUANKRERKKUL84Nadnudda RODTHONGKUM85Buranee KANCHANATAWANPowder injection moulding of porous Ni-YSZ anode for solid oxide fuel cell(Project 2014)Graphene-Polymer Nanocomposite Based Electrochemical Biosensor for Medical Diagnosis(Project 2014)Negative symptoms and neurocognitive defects in schizophrenia: associations with staging of illness, quality of life and social functioning(Project 2014)67Powder injection moulding (PIM) is a cost effective process for large-scale, near-net-shape fabrication. PIM is employed in this work to fabricate porous anode for solid oxide fuel cells (SOFC). The PIM process started with a preparation of feedstocks by mixing powder with binder. The feedstock then is injected into the mould of desired shapes. The mouldings were subsequently undergo the removal of the binder (debinding) and, finally, sintering. In this work, PIM can be applied in a preparation of porous nickel-yttria stabilized zirconia (Ni-YSZ) anodesupported for solid oxide fuel cells. Mixtures composed of NiO and YSZ powders were prepared. A water-soluble based binder system, consisted mainly of polyethylene glycol (PEG), has been used in this work. This is to avoid the use of organic solvents when wax-based binder was used. This binder can also promote more environmentally friendly process. The removal of binder was carried out using water debinding technique. The porous anode for SOFC was subjected to systematic characterisation. The effect of processing parameters, such as powder characteristics and powder/binder ratio has been investigated. It was found that adjusting the sintering temperatures can controlled the porosity of the specimens. The porous anode specimens were also characterised for the properties. In addition, the microstructure was observed by scanning electron microscope.Nanocomposites of graphene (G) and polymer are developed and used as novel electrodes in electrochemical biosensor for rapid and sensitive detection of disease biomarkers. The large surface area and high electric conductivity and of G can substantially increase the electrochemical response of the system, leading to enhanced sensitivity in the detection of target biomolecules. Here, type of G nanocomposite, electrode fabrication, electrode functionalization and electrochemical parameter are investigated and optimized with target biomarkers (Neutrophil gelatinase-associated lipocalin; NGAL). Eventually, this approach is applied for real-life sample analysis in medical diagnosis.There are lots of evidences suggested that schizophrenia is one of neurodegenerative disorder. Types of schizophrenia was suspected to influence the degree of cognitive degeneration especially schizophrenia with negative symptoms such as deficit schizophrenia. This study would like to assess cognitive impairment related to negative symptoms, staging of illness, quality of life and social function. Three groups of sample ,consisting of deficit schizophrenia(DS), non-deficit schizophrenia(NDS) and normal control(NC) 40 cases each, were comparatively evaluated in demographic data, staging of illness, quality of life , social functioning and series of cognitive tests : MMSE, verbal fluency test, Boston naming test, word list recall and recognition as well as CANTAB (the Cambridge Neuropsychological Test Automated Battery) which providing assessment of motor, attention, memory, working memory, executive function, planning and emotional recognition. The outcome
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