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- 저자 : Mossalayi, Haydar (검색결과 2 건)
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Moghimi, Ali,Mossalayi, Haydar Korean Chemical Society 2008 대한화학회지 Vol.52 No.2
2-Propylpiperidine-1-carbodithioate(PPCD)I 로 수식화한 octadecyl로 결합된 실리카 막 디스크로 구리(II) 이온의 잔유양의 추출과 간단하고 빠르게 원자흡수분광법(AAS)으로의 정량법을 소개한다. 추출효율과 흐름속도, pH, 형 태, 벗김 산의 가장 적은 양에 대해 연구되었다. Anthraquinone 유도체의 2 mg로 수식한 막디스크의 최대 용량은 425 μg Cu2+ 이었다. 제안한 방법의 검출한계는 7 ng/ml이다. 이 방법은 다른 시료와 온천수 시료로부터 Cu2+의 회수에 적용하 였다. A simple and fast method for extraction and determination of trace amounts of copper(II) ions using octadecyl-bonded silica membrane disks modified with 2-propylpiperidine-1-carbodithioate (PPCD)I and atomic absorption spectrometry (AAS) is introduced. Extraction efficiency and the influence of flow rates, pH, and type and smallest amount of stripping acid were investigated. Maximum capacity of the membrane disks modified with 2 mg of the anthraquinone derivative used was found to be 425μg Cu2+. The limit of detection of the proposed method is 7 ng/ml. The method is applied to the recovery of Cu2+ from different synthetic samples and a spring water sample.
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Challenging issues in vitiligo research
( A Taieb ),( T Jouary ),( K Boniface ),( J Seneschal ),( M Cario Andre ),( D Mossalayi ),( K Ezzedine ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
In the last five years we have studied prospectively a large cohort of children and adults with vitiligo. Clinical and pathological observations made in this group of patients have been of major importance to direct our bench research. In particular, the relation of segmental to nonsegmental vitiligo has been questioned, new forms of vitiligo have been delineated, and the importance of factors affecting immune responses (autoimmune and atopic diathesis) in patients and families have been studied. Recent data underline that vitiligo associated with thyroid autoantibodies has distinct clinical features from vitiligo without thyroid autoantibodies. In particular, patients with longer duration of disease and greater body surface involvement are more likely to present thyroid autoantibodies and should thus be monitored for thyroid function and anti-thyroid antibodies on a regular basis. Koebner`s phenomenon and its role in primary melanocytorrhagy vs relation to inflammatory progression of disease is important for disease assessment and prognosis. A simple clinical score for Koebner`s phenomenon was developed indicating that seven variables were independently associated with the presence of KP namely disease duration of more than 3 years, forehead + scalp areas, eyelids, wrists, genital + belt areas, knees and tibial crests. The score sustained adequate discrimination and calibration arguing that KP can be adequately predicted. Better nomenclature and outcome measures to perform muticenter randomized trials are future goals of our group within the Vitiligo European task force, now joined by other international colleagues since last year Vitiligo Global Issues Consensus Conferences held in Seoul and Bordeaux.
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