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Preloading을 이용한 손상된 PSC Beam 교량의 보강 방안
유용민,박종면,장석윤 서울시립대학교 도시과학연구원 2002 도시과학논총 Vol.28 No.1
In Basic structures, bridge structures are increasing as economy develops. Design, construction and maintenance relating bridge structures are rapidly developing. Especially bridge structures using prestressing are designed and constructed for many kinds of structures such as expressways, industrial roads and circular expressways. But Because PSC beam bridges are different from steel structures and concrete structures in structural concept, this is designed and constructed differently. And it needs complete maintenance. When PSC beam bridges are damaged, this paper shows repair and reinforcement analysis using prestressing characters. In this paper, basic researches are achieved for repair methods of new form using preloading.
급성 B형 간염 환자에서 HBsAg / 1gG 면역복합체 측정의 의의
김홍수,이문호,김선주,황성규,양동호,박필원,박상흠,정일권,홍세용,박종면 대한소화기학회 1998 대한소화기학회지 Vol.32 No.1
Backgrounds/Aims: HBsAg/IgG immune complexes (ICs) have been found in patients with hepatitis B virus (HBV) infection. To understand the immunologic process in patients with acute viral hepatitis (AVH) B, HRsAg/IgG ICs were quantified. Methods: We serially quantified HBsAg/IgG ICs in patients with AVH B by ELISA method (Ag-specific), Results: The ICs were detected in 6 out of 9 cases of AVH B with wide quantitative range from 24 ng/mL to 2,251 ng/mL. In the two cases of high ICs, the ICs were measured as 2,251 ng/mL in the 1st week and 540 ng/mL in the 3rd week. In 4 cases, ICs were detected in relatively low titers from 24 to 186 ng/mL. In all the 6 cases of HBsAg/IgG ICs positive, anti-HBs was all negative, and HBcAb was all positive. In 5 out of the 6 cases, HBsAg was positive. The appearance of ICs was not correlated with the level of serum SGPT or the duration of liver function recovery. Conclusions: HBsAg or anti-HBs were present as HBsAg/ IgG ICs during acute phase of AVH B, in which HBsAg or anti-HBs were not detected by conventional radioimmunoassay (RIA). The HBsAg/IgG ICs could be the viral marker complementing eonventional RIA as qualitative method. The quantitive measurement of HBsAg/IgG ICs might provide better understanding of the immunologic process of AVH B.