نتایج جستجو برای: ppv
تعداد نتایج: 5238 فیلتر نتایج به سال:
Single chains of conjugated polymers e.g. MEH-PPV (poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene) have become interesting objects for single molecule spectroscopy (SMS) studies. However, most of the experiments so far were performed without full awareness of the isolation status of the polymer chains in host matrices. We used steady-state and time-resolved fluorescence methods and 2...
The charge photogeneration and early recombination in MEH-PPV-based charge-transfer complexes (CTCs) and in MEH-PPV/PCBM blend as a reference are studied by ultrafast visible-pump-IR-probe spectroscopy. After excitation of the CTC band, an immediate (<100 fs) electron transfer is observed from the polymer chain to the acceptor with the same yield as in the MEH-PPV/PCBM blend. The forward charge...
Sharka is a disease of fruiting, ornamental and wild Prunus species of great socio-economic relevance that has spread to most Prunusgrowing nations. It is caused by Plum pox virus (PPV), a member of the genus Potyvirus. In recent years, there have been notable advances in our understanding of genome organization and expression, functions of gene products, and pathogenicity and host range determ...
Purpose. To determine the factors associated with the development of a macular hole (MH) after successful rhegmatogenous retinal detachment (RRD) surgery. Methods. Of 1260 eyes that underwent surgery for RRD between April 2005 and March 2010 in our hospital, the medical records of 4 cases from our hospital and one case from another hospital that had undergone RRD surgery and later developed MH ...
در این مقاله، گزارش ساخت و مشخصه‌یابی دیودهای نورگسیل پلیمری (PLED) دو‌لایه با ساختار ITO/PEDOT:PSS/MEH-PPV/Al، با هدف کاهش ولتاژ روشن شدن، ارائه می‌شود. در این کار، لایۀ PEDOT:PSS به-عنوان لایۀ تزریق‌کنندۀ حفره با سرعت rpm 2000 و لایۀ MEH-PPV به‌عنوان مادۀ فعال با چهار سرعت لایه‌نشانی متفاوت و به‌روش لایه‌نشانی چرخشی، لایه‌نشانی شد. اثر تغییر ضخامت لایۀ MEH-PPV بر روی خواص سطحی لایه‌ها، خواص ج...
Purpose: This study aimed to evaluate and compare the long-term surgical complications of scleral buckling (SB), pars plana vitrectomy (PPV), and their combination in pseudophakic retinal detachment (PRD). Methods: This retrospective study included 127 patients who were operated with PRD diagnosis and followed-up for at least 6 months. The patients were divided into 4 groups: Group 1 included c...
The rheological behavior of different precursor poly(p-phenylene vinylene) (prec-PPV) monolayers at the air-water interface was investigated using an interfacial stress rheometer (ISR). This device nicely reveals a transition of the precursor poly(2,5-dimethoxy-1,4 phenylene vinylene) (prec-DMePPV) monolayer from Newtonian to elastic behavior with increasing surface pressure. The transition is ...
BACKGROUND The best predictors of short- and medium-term mortality of cirrhotic patients receiving intensive care support are unknown. METHODS We conducted meta-analyses from 13 studies (2523 cirrhotics) after selection of original articles and response to a standardized questionnaire by the corresponding authors. End-points were in-ICU, in-hospital, and 6-month mortality in ICU survivors. A ...
Dynamic preload assessment tests, especially pulse pressure variation (PPV) and stroke volume variation (SVV), are increasingly acknowledged in mechanically ventilated patients as being predictors of fluid responsiveness. However, the limitations of this method are often neglected or overlooked. One of the prerequisites for PPV and SVV evaluation, in addition to intermittent positive pressure v...
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