Surfactant

In this study, the effect of benzenethiol ligand on CdSe/ZnS core/shell quantum dots was investigated. Conventional long-chain oleic acid (OA) and trioctylphosphine (TOP) capping ligands were partially replaced by short benzenethiol ligands, and the improvement in the luminescence performance was observed in quantum dot light emitting diodes (QD-LED). Approximately 1.8 fold improvement was achieved for both the maximum luminance and maximum current efficiency for the QD-LEDs fabricated with…

Stages of pregnancy Weeks 1-3: The female hormone oestrogen will trigger a women’s uterus so it forms a thick blood-rich lining of tissue. The other female hormone progesterone will begin to prepare the uterus so it can support a fertilised egg and accommodate the growing baby over the next few months. During this time, the woman’s ovaries will also ripen the eggs in follicles (sacs filled with fluid). Ovulation This is a part of the menstrual cycle where the woman’s ovaries release an…

Nanocrystal thin film transistors (NC TFTs) have been intensively researched, because of their low-temperature processability.1,2 Colloidal NCs are synthesized in a liquid solution containing some stabilizing organic molecules, broadly termed as surfactants, which are bulky and insulating ligands. The individual NCs in the thin film are indeed separated by these ligands, which significantly inhibit the charge transport. One of the simple yet effective ways to enhance the electrical performance…

The first 12 hours of a neonates life is the most critical time in which hypothermia can set in. For 9 months the child is in a warm amniotic sac where coldness is never felt. Once the neonate experiences extrauterine life, the neonate is now at risk for cold stress (Durham, 2014, p. 377). There are four different ways in which a neonate can loose heat; these four are radiation, convection, conduction, and evaporation. Studies have shown that the nurses procedures have a major effect on heat…

degraded in the body. PLGA microspheres with particle size ranges from 100nm to 500µm show a loading level of 38.1%. This means each gram of PLGA microsphere is loaded with 381 mg of risperidone (2). The clear and colourless diluent contains the surfactant polysorbate 20 to reduce the surface tension for easier reconstituting, the stabiliser sodium carboxymethyl cellulose to stabilise the micro suspension, sodium chloride and sodium hydroxide to adjust the pH, disodium hydrogen phosphate…

Fracking has large impact on daily life for global consumers, it effects prices and availability of fuels for consumers. Fracking is an exceptionally complicated process. To start the process, a ten thousand foot well is drilled below the surface into shale layers. Next, 1 to 8 million gallons of water mixed with chemicals are injected into the well at extremely high pressures to crack the rock. This will allow the product to flow out once the water is mostly removed. This process is highly…

Introduction Graphene is considered as pure carbon in the form of a very thin, one atom thick nearly transparent sheet. It is very strong for its low weight (100 times more stronger than steel and it conducts heat and electricity efficiently. While scientists had theorized about graphene for decades, it was first produced in the lab in 2003. Because it is virtually two-dimensional, it interacts oddly with light and with other materials. Researchers have identified the, ballistic transport of…

During the nine-month period of pregnancy, the most remarkable process of events leads to the birth of a baby. This period is broken down into 3-month increments called trimesters. Each trimester marks the end and beginning of a very important process going on inside the womb. The trimesters each have different responsibilities and goals that must be accomplished before the end of that period. If the goals are not reached by their set time limit, the pregnancy is at the chance of being…

The major bottleneck for lipid extraction from the wet microalgae is the low extraction efficiency, because of the immiscibility of nonpolar organic solvents with water contained in wet microalgae {Yoo, 2012 #31} {Kim, 2013 #118}. Traditional method for lipid extraction from dry biomass uses a co-solvent system, which consist of a non-polar solvent and polar solvent {Halim, 2012 #7} {Kim, 2013 #118}. When the co-solvent system is directly applied to wet microalgal biomass, the microalgal cells…

Imagine a world where instead of cool, crisp rivers, there were hazardous, burnt coffee colored bodies of water. The air we breathe and the water we drink are considered very important to every living organism in the world; unfortunately, humans using more and more of the earth’s resources, which results in the deterioration of them. Water resources are necessary for human survival, but our constant pollution of them will result in its end. The only solution is for change; America must cut back…