نتایج جستجو برای: donations
تعداد نتایج: 2999 فیلتر نتایج به سال:
BACKGROUND Testing of blood donors for human immunodeficiency virus type 1 (HIV-1) and hepatitis C virus (HCV) RNA by means of nucleic acid amplification was introduced in the United States as an investigational screening test in mid-1999 to identify donations made during the window period before seroconversion. METHODS We analyzed all antibody-nonreactive donations that were confirmed to be ...
BACKGROUND Japanese Red Cross (JRC) blood centers implemented anti-hepatitis B core antigen (HBc) screening in 1989 and 50-minipool (MP)-nucleic acid testing (NAT) in 2000. A systematic lookback study has been conducted to determine the hepatitis B virus (HBV) transmission risk of donations drawn in the pre-hepatitis B surface antigen (HBsAg) and/or MP-NAT window phase and by donors with occult...
Money is central in US politics, and most campaign contributions stem from a tiny, wealthy elite. Like other political acts, campaign donations are known to be socially contagious. We study how campaign donations diffuse through a network of more than 50,000 elites and examine how connectivity among previous donors reinforces contagion. We find that the diffusion of donations is driven by indep...
The article proposes methodological guidelines for studies on a new tool in communication and gift-giving: online donations. It looks at donations the context of gift culture, with particular emphasis changes introduced by digitisation. author argues that are source valuable data, which could prove useful many sciences. As very specific relatively form media market, not an easy research materia...
The bulk of today's (“preorder-,” “reward-,” “gift-,” and “donation-based”) crowdfunding raises funds for small, private entrepreneurial ventures without granting funders claims to the projects’ income or ability guarantee realization delivery project outcomes. We theorize show empirically – via a mixed-method approach applied representative remarkably informative case that payoff structure cro...
Background and Aims: Evaluation of the prevalence of transfusion-transmissible infections (TTIs) in blood donors is a valuable index of donor selection and blood safety. This study was conducted to explore the prevalence and trends of TTIs markers and study of confidential unit exclusion )CUE) option among blood donors in Kurdistan province in the west of Iran. Materials and Methods: We conduc...
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