Alex Yi-Min Tsai

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The assembly of long non-contractile phage tails begins with the formation of the tail tip complex (TTC). TTCs are multi-functional protein structures that mediate host cell adsorption and genome injection. The TTC of phage λ is assembled from multiple copies of eight different proteins, including gpL. Purified preparations of gpL and several homologues all(More)
The use of autogenous gingival grafts has proved to be an effective and predictable way to increase the amount of keratinized gingiva. However, discomfort and pain at the donor site are unavoidable. Acellular dermal matrix (ADM) allograft can be used as a donor tissue to eliminate the need for another surgical site and alleviate pain and trauma. The purpose(More)
Acute lower respiratory infections, which broadly include pneumonia and bronchiolitis, are still the leading cause of childhood mortality. ALRI contributed to 18% of all deaths in children younger than five years of age in 2008 [1], and the main pathogens responsible for high mortality were Streptococcus pneumoniae, Haemophilus influenzae and respiratory(More)
We study the implications of CEO equity ownership for incentives and control in a sample of 1,011 newly public firms. Before an initial public offering, equity investments by venture capitalists reduce CEO ownership by about half, from an average of 35 percent to 19 percent. Venture capitalists narrow this difference by granting options, reducing secondary(More)
AIMS β-Site amyloid precursor protein (APP)-cleaving enzyme 1 (BACE1) is a biological and positional candidate gene for Alzheimer's disease (AD). Previous studies found that BACE1-null mice had impaired performance on cognition and neurodegeneration during the aging process. Additionally, a synonymous polymorphism of BACE1 (rs638405) in exon 5 has been(More)
The amide bond may be considered as one of the most important chemical building blocks, playing an important role not only in living organisms but in organic chemistry as well. The exact description and precise quantification of the amide bond strength is difficult, requiring a particular type of theoretical investigation. The present paper suggests a(More)
AIM This study compared clinical results of 40 periodontal osseous defects treated by two types of absorbable barrier materials. MATERIAL AND METHODS Thirty patients (23 males and seven females) suffering from moderate to advanced periodontitis (with comparable osseous defects) were randomly assigned to receive either Atrisorb barrier (n = 22; group A) or(More)
OBJECTIVES To determine the effect of various systemic antibiotic prophylaxis regimes on patient-reported outcomes and postsurgical complications in patients undergoing conventional implant installation. MATERIAL AND METHODS Three hundred and twenty-nine healthy adults in need of conventional implant installation were randomly assigned to one of four(More)
This paper describes board size and composition and investigates the role of venture capital in a sample of 1,116 firms’ initial public offerings. First, firms backed by venture capital have fewer insider and instrumental directors and more independent outsiders. Second, we consider board composition as the outcome of a bargain between the CEO and outside(More)