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Maternal–cord blood vitamin C status and its relation to fetal growth and placental apoptosis
submitted by kamada3k8 17 minutes ago - Topic: Health
Although the antioxidant property of vitamin C as well as its endothelial function promotion are well documented, its role in fetal growth during pregnancy is still not conclusive in previous studies. This study aimed to estimate maternal and cord blood vitamin C level and to detect its influence on neonatal growth as well as placental weight and placental apoptosis. The study was conducted on ...



Effect of processing additive 1,8-octanedithiol on the lifetime of PCPDTBT based Organic Photovoltaics
submitted by spoz 21 minutes ago - Topic: Health
The effect that processing additives have upon the lifetime of PCPDTBT-based OPVs has been investigated. The results show conclusively that whilst ODT processing additive enhances the initial performance of PCPDTBT:PCBM OPVs, it is detrimental to their long term performance, when measured under light soaking at 1 Sun of irradiance. are shown for both encapsulated and non-encapsulated devices. T...

On the mode of operation in electrolyte-gated thin film transistors based on different substituted polythiophenes
submitted by spoz 22 minutes ago - Topic: Health
Organic Thin Film Transistors (OTFT), gated through an aqueous electrolyte, have extensively been studied as sensors in various applications. These water-gated devices are known to work both as electrochemical (Organic ElectroChemical Transistor – OECT) and field-effect (Organic Field-Effect Transistor – OFET) devices. To properly model and predict the response of water-gated OTFT sensors i...

Enhanced power conversion efficiency of organic solar cells by embedding Ag nanoparticles in exciton blocking layer
submitted by spoz 22 minutes ago - Topic: Health
We demonstrate the power conversion efficiency of bulk heterojunction organic solar cells can be enhanced by introducing Ag nanoparticles into organic exciton blocking layer. The Ag nanoparticles were incorporated into the exciton blocking layer by thermal evaporation. Compared with the conventional cathode contact materials such as Al, LiF/Al, devices with Ag nanoparticles incorporated in the ...

High efficiency green phosphorescent top-emitting organic light-emitting diode with ultrathin non-doped emissive layer
submitted by spoz 22 minutes ago - Topic: Health
Ultrathin non-doped emissive layer (EML) has been employed in green phosphorescent top-emitting organic light-emitting diodes (TOLEDs) to take full advantages of the cavity standing wave condition in a microcavity structure. Much higher out-coupling efficiency has been observed compared to conventional doped EML with relatively wide emission zone. A further investigation on dual ultrathin non-d...



Absolute photoluminescence quantum yield of perylene dye ultra-thin films
submitted by spoz 22 minutes ago - Topic: Health
Using integrating sphere method we have determined the absolute photoluminescence quantum yield (QY) of two perylene derivatives in ultra-thin films. Monomolecular and multilayer films were deposited onto quartz substrates by using Langmuir–Blodgett technique. The method adopted by us allows to evaluate QY with a high accuracy for samples having absorbance down to 0.0The evaluated luminescenc...

Ethoxylated polyethylenimine as an efficient electron injection layer for conventional and inverted polymer light emitting diodes
submitted by spoz 22 minutes ago - Topic: Health
We report inverted light emitting devices using ethoxylated polyethylenimine (PEIE) as a single electron injection layer for indium tin oxide cathode, which possess comparable efficiency to those using ZnO/PEIE double electron injection layers. Implementation of a PEIE layer between light emitting polymer layer and aluminum has been shown to significantly enhance device efficiency as well. Impr...


Phosphorescent dye-doped hole transporting layer for organic light-emitting diodes
submitted by spoz 23 minutes ago - Topic: Health
Hole transport materials are critical to the performance of organic light-emitting diodes (OLEDs). While 1,1-bis(di-4-tolylaminophenyl)cyclohexane (TAPC) with a high triplet energy is widely used for high efficiency phosphorescent OLEDs, devices using TAPC as a hole transport layer (HTL) have a short operating lifetime due to the build-up of trapped charges at the TAPC/emitting layer (EML) inte...

Pulsed voltage driven organic field-effect transistors for high stability transient current measurements
submitted by spoz 23 minutes ago - Topic: Health
In this article, we propose the usage of gate voltage pulses of alternating polarity, to effectively suppress the hysteresis in organic field effect transistors (OFETs). The hysteretic behaviour of poly(3-hexylthiophene-2,5-diyl) (P3HT) based OFETs is systematically investigated by using continuous and pulsed sweep voltage mode. On the basis of the experimental results, both time settings and m...


Efficient organic near-infrared photodetectors based on lead phthalocyanine/C60 heterojunction
submitted by spoz 23 minutes ago - Topic: Health
High efficiency organic small molecule near-infrared photodetectors (NIR-PDs) based on a lead phthalocyanine/C60 planar heterojunction are demonstrated. The NIR-PDs show a broad-band response that extends to 1100nm. The performance of the NIR-PDs is improved by using CuI as anode buffer layer. The optimized NIR-PD exhibits a response peak at about 900nm with external quantum efficiencies (EQEs)...

Relationship between circulating endothelial progenitor cells and insulin resistance in non-diabetic patients with ischemic chronic heart failure
submitted by riin2345 39 minutes ago - Topic: Health
The objective of this study was to assess a relationship between insulin resistance (IR) and counts of CD45−CD34+, CD14+CD309+, and CD14+CD309+Tie2+ phenotyped circulating endothelial progenitor cells (EPCs) in patients with ischemic chronic heart failure (CHF). The study involved 300 CHF patients (186 males) aged 48–62 years with angiografically proven coronary artery disease and/or previo...


Diagnostic utility of p53 and CK20 immunohistochemical expression grading urothelial malignancies
submitted by kinwelkens 51 minutes ago - Topic: Health
Current grading system in application by WHO/ISUP divides urothelial malignancies in low and high grade by morphologic criteria while strict segregation may become cumbersome in limited tissue specimens. As grading these carcinomas are of utmost prognostic significance after depth of invasion, therefore we evaluated the role of immunohistochemical expression of p53 and cytokeratin 20 as an adju...

Acid mine drainage: Challenges and opportunities
submitted by ondriomongane 54 minutes ago - Topic: Environment
Acid mine drainage (AMD) or acid rock drainage (ARD) is considered as one of the main pollutants of water in many countries that have historic or current mining activities. Its generation, release, mobility, and attenuation involves complex processes governed by a combination of physical, chemical, and biological factors. In general, AMD is produced by the oxidative dissolution of sulphide mine...

Fabrication of highly visible light sensitive graphite-like C3N4 hybridized with Zn0.28Cd0.72S heterjunctions photocatalyst for degradation of organic pollutants
submitted by ondriomongane 55 minutes ago - Topic: Environment
Novel hybridization of g-C3N4/Zn0.28Cd0.72S heterjunctions photocatalysts was successfully synthesized via the combination of chemisorptions and thermal post-treatment, wherein the g-C3N4 serves as substrates to provide sites to anchor the Zn0.28Cd0.72S nanorods. These nanostructured g-C3N4/Zn0.28Cd0.72S composites were extensively characterized by X-ray diffraction (XRD), field emission scanni...

CO2 capture with complex absorbent of ionic liquid, surfactant and water
submitted by ondriomongane 55 minutes ago - Topic: Environment
A new kind of high efficiency and low cost CO2 complex absorbent was studied. Through innovative research, imidazolium-based ionic liquid was mixed with an aqueous solution of a non-ionic surfactant. The absorption ability of each complex absorbent with different concentrations was tested under a condition of 20°C, from 0.1 to 0.6MPa. The absorption capacity of CO2 in absorbents increases with...