Van der Waals force

Cyclodextrins are enzymatically modified starches composed of glycopynanose units which form a ring of either six (α-cyclodextrin), seven (β-cyclodextrin) or eight (γ-cyclodextrins) units. Characteristics of β-cyclodextrins include: • Glucose unit: 07 • Molecular weight: 1135 • Solubility =1.85g/100ml • Cavity diameter = 6.4 Ǻ • Diameter of outer periphery = 15.4 Ǻ • Approx. volume of cavity = 262 (Ǻ)3 Cyclodextrins have a cylindrical shape with central axial cavity and resembles the shape of a…

This is because of the strong van der Waals forces, that graphene tend to agglomerate rapidly [35]. Latex compounding or latex blending is one of the mixing methods which incorporate the rubber latex with aqueous dispersion of filler under certain condition. Latex particles with sizes approximately…

intermolecular force. Below are a few examples Covalent A covalent bond is between two non-metallic atoms. These are held in a simple molecular lattice with individual molecules (see diagram A below of an Iodine molecule) with a strong covalent bond. A) s-cool (2016) The melting and boiling points are quick low and can be broken with relatively little energy (OCR, 2008), the low melting and boiling points are due to the fact you only need to overcome the weak intermolecular force, not the…

remarkable adsorption behavior in purification and detoxification of the environmental pollutants[12]. Their characteristics of being highly porous, having large specific area and being not solvable in aqueous solution because of the high Van der Waals interaction forces on the tube walls(pi-stacking) allow them to be great environmental pollutants adsorbent in solution. Thus, researchers have been concentrated on aqueous solution purification with single-walled carbon nanotubes(SWCNTs) and…

Gecko Gloves Many children dream of being a superhero and climbing walls, however this idea may seem too far fetched for any human to accomplish; or is it? The gecko gloves are an astounding new development in the technological field that allows humans to climb walls with ease. Most of the development is for the movies and the military, however some variations are being dispersed for public usage. These variations will contain many of the same aspects as the original, however, the variation…

Phospholipids Phospholipids are a kind of lipid that are well suited to both their biochemical and physiological function. They comprise of a glycerol backbone with a phosphate head and two fatty acid tails. The tails are hydrophobic, meaning that they do not interact with water. When a group of phospholipids come into contact with water they arrange themselves in a bilayer that hides the hydrophobic parts from the aqueous surroundings. This leaves the head of the phospholipid in contact with…

In this experiment, solid-liquid extraction was used to separate trimyristin from the other components in nutmeg. The result was then tested for purity using melting point analysis. This extraction technique uses differing solubilities of components in a chosen solvent system, in this case diethyl ether, as a means of separation. Utilizing this technique, of the original 3.8146 grams of nutmeg, 0.1905 grams of trimyristin were recovered, yielding a 4.99 % composition. This methodology can…

compartments. It is also a carrier protein by non specifically binding several biomolecules. Ligand is a molecule can bind and make a complex with a biomolecule for biological purpose. Its binds those molecules with intermolecular force such as H-bonding, ionic bond, and Van der Waals forces. In this experiment, we used the phenol red to bind to the albumin. Phenol red…

for body fluids distribution between body tissues and intravascular compartments. Ligand is a molecule can bind and make a complex with a biomolecule for biological purpose. Its binds those molecules with intermolecular force such as H-bonding, ionic bond, and Van der Waals forces (#1. Worldlibrary.org). In this experiment, we used the…

Name of disease Sickle Cell Disease Location 11p15.4 – chromosome 11, on short arm of chromosome, region 1, band 5, sub-band 4 Gene/locus HBB – haemoglobin subunit beta HTML reference Stumpf, A.M. (2013). Sickle cell disease Available form: http://www.omim.org/entry/603903?search=Sickle%20Cell%20Disease&highlight=cell%20sickle%20disease Frequency More than 230 000 children with sickle cell disease are born in Africa every year, which makes about 80% of the global total. In Europe estimated…