نتایج جستجو برای: donor density
تعداد نتایج: 475000 فیلتر نتایج به سال:
PURPOSE To report our clinical experience and 4-year follow-up results of Descemet stripping automated endothelial keratoplasty (DSAEK) with the suture pull-through insertion technique. METHODS This is a retrospective study of 195 eyes in which a posterior lamellar keratoplasty was performed between 2007 and 2011. The insertion of a folded donor lenticule was performed with a double-armed 10-...
Donor-Acceptor (D-A) polymer field-effect transistors (pFETs) are at the cutting edge of organic electronics. However, some fundamental cognition interface states remains unquantified, particularly different dynamic scales. In this study, D-A quantified using pumping method. The experimental results indicate that state density transistor is insensitive to measurement pulse condition and stays w...
Energy level alignments at the organic donor–acceptor interface cannot be predicted from cyclic voltammetry. Onsets for joint density of states and charge generation, reveal cases energy uphill – newly observed downhill generation.
PURPOSE The purpose of this study was to assess the relationship between donor factors and 5-year corneal graft survival in the Cornea Donor Study. METHODS Donor corneas met criteria established by the Eye Bank Association of America, had an endothelial cell density of 2300 to 3300/mm, and were determined to be of good to excellent quality by the eye banks. Donor corneas were assigned using a...
OBJECTIVE To determine whether endothelial cell loss 5 years after successful corneal transplantation is related to the age of the donor. DESIGN Multicenter, prospective, double-masked clinical trial. PARTICIPANTS Three hundred forty-seven subjects participating in the Cornea Donor Study who had not experienced graft failure 5 years after corneal transplantation for a moderate-risk conditio...
The effects of microwave {MW) irradiation on photoexcited free and donor-bound electrons are studied in semi-insulating, bulk GaAs in the temperature range of 2—20 K. The main observations are as follows: an abrupt increase in the photoinduced microwave absorption (PMA), a concurrent decrease of the donor-acceptor pair photoluminescence and self-oscillations in the PMA when the incident MW powe...
DFT-GGA method of Perdew-Burke-Ernzerhof (PBE) is used with aug-cc-PVTZ, 6-311++G**, and Def2-TZVP large basis sets to study the hydrogen bond interactions between oxygen lone pair as a donor electron with hydrogen atom connected to the aniline’s nitrogen as an electron acceptor (H2O···HNH-Ph), and nitrogen lone pair with hydrogen of water molecule (Ph-H2N···HOH...
Bioluminescence resonance energy transfer (BRET) is often used to study association of membrane proteins, and in particular oligomerization of G protein-coupled receptors (GPCRs). Oligomerization of class A GPCRs is controversial, in part because the methods used to study this question are not completely understood. Here we reconsider oligomerization of the class A β2 adrenergic receptor (β2AR)...
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