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排序方式: 共有170条查询结果,搜索用时 15 毫秒
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Marcela Socol Nicoleta Preda Carmen Breazu Gabriela Petre Anca Stanculescu Ionel Stavarache Gianina Popescu-Pelin Andrei Stochioiu Gabriel Socol Sorina Iftimie Christine Thanner Oana Rasoga 《Materials》2023,16(1)
Lately, there is a growing interest in organic photovoltaic (OPV) cells due to the organic materials’ properties and compatibility with various types of substrates. However, their efficiencies are low relative to the silicon ones; therefore, other ways (i.e., electrode micron/nanostructuring, synthesis of new organic materials, use of additives) to improve their performances are still being sought. In this context, we studied the behavior of the common organic bulk heterojunction (P3HT:PC70BM) deposited by matrix-assisted pulsed laser evaporation (MAPLE) with/without 0.3% of 1,8-diiodooctane (DIO) additive on flat and micro-patterned ITO substrates. The obtained results showed that in the MAPLE process, a small quantity of additive can modify the morphology of the organic films and decrease their roughness. Besides the use of the additive, the micro-patterning of the electrode leads to a greater increase in the absorption of the studied photovoltaic structures. The inferred values of the filling factors for the measured cells in ambient conditions range from 19% for the photovoltaic structures with no additive and without substrate patterning to 27% for the counterpart structures with patterning and a small quantity of additive. 相似文献
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A new comprehensive 12‐segment approach to right ventricular systolic and diastolic functions by 2D speckle tracking echocardiography in healthy individuals 下载免费PDF全文
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Grisaru-Granovsky S Samueloff A Elstein D 《European journal of obstetrics, gynecology, and reproductive biology》2008,136(2):146-150
Abnormally high- or low-serum maternal levels and/or levels in placental, umbilical blood, and fetus/neonate are associated with a wide spectrum of complicated pregnancies. Whereas the state of knowledge about mechanisms and pathways involving secondary or tertiary modulators is far from complete, the role of leptin from ovulation and implantation and throughout pregnancy underscores its importance in normal and abnormal states. 相似文献
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Roxana Cristina Rimbaş Sorina Mihăilă Baldea Ruxandra Drăgoi Galrinho Antunes Guerra Simona Ionela Visoiu Mihai Rimbaş Corina Silvia Pop Dragoş Vinereanu 《Ultrasound in medicine & biology》2018,44(3):562-574
There are no clear recommendations regarding cirrhotic cardiomyopathy (CC) evaluation in patients with pre-transplant liver cirrhosis. The roles of new methods, tissue Doppler imaging (TDI) and speckle tracking echocardiography (STE) in the diagnosis and prognosis of cirrhotic cardiomyopathy remain controversial. We investigated the utility of TDI/STE parameters in cirrhotic cardiomyopathy diagnosis and also in predicting mortality in patients with liver cirrhosis. Left/right ventricular function was studied using conventional TDI (velocities) and STE (strain/strain rate). We assessed left ventricular diastolic dysfunction, graded into four new classes (I/Ia/II/III). Serum NTproBNP (N-terminal prohormone of brain natriuretic peptide), troponin I, β-crosslaps, QTc interval, arterial compliance and endothelial function were measured. Liver-specific scores (Child–Pugh, MELD, MELDNa) were computed. There was a 1-y follow-up visit to determine mortality. We observed resting biventricular diastolic myocardial dysfunction, not presently included in the definition of cirrhotic cardiomyopathy. We provided an improved characterization of cardiac dysfunction in patients with liver cirrhosis. This might change the current definition. However, the utility of STE/TDI parameters in predicting long-term mortality in patients with liver cirrhosis remains controversial. 相似文献
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Grisaru-Granovsky S Seaward PG Windrim R Wyatt P Kelly EN Ryan G 《Fetal diagnosis and therapy》2000,15(4):209-211
Thoracoamniotic shunting has been described as having a beneficial role in the antenatal management of primary pleural effusions in singleton pregnancies. We report a case of a twin pregnancy in which progressive pleural effusions and hydrops were diagnosed in one of the fetuses at 16 weeks of gestation. An initial evaluation ruled out underlying genetic and anatomic abnormalities in both twins. At 19 weeks gestation, the first procedure of bilateral thoracoamniotic shunting was performed in the affected fetus, subsequent to which the lungs re-expanded and the hydrops resolved. Three additional shunt replacements and one therapeutic amniocentesis were required on follow-up. At 35 weeks, labor was induced. The first fetus (healthy) was delivered vaginally and the second fetus (affected) was delivered by cesarean section. Both neonates are healthy at one year follow-up. 相似文献
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