Protein Based Bioflocculants, Tizazu Mekonnen

The effect of molecular weight on the rate of diffusion was assessed using agar-water gel test. The agar-water gel set up was composed of a petri dish of agar-water gel containing three wells. Drops of potassium permanganate (KMnO4), potassium dichromate (K2Cr2O7) and methylene blue(C16H18N3SCl) were simultaneously introduced to each well. Methylene blue, having the largest molecular weight, displayed the smallest diameter (11 mm) and diffused at the slowest rate (0.20 mm/min.). Next is potassium dichromate with a diameter of 24 mm and rate of diffusion of 0.30 mm/min.. The fastest is the

It is help us to understanding of how coagulation process occurs in vitro and interpretations of laboratory tests for coagulation system abnormalities(This is the reason they are used so far). But there are Disadvantages in thes model.

However, in the case of overproduction or impaired clearance, A aggregates into extracellular oligomers, fibrils and eventually, plaques.18

Seven clean 100 mL volumetric flasks were obtained and 2.00 mL of 1.551 ×10^(-3) M bromothymol blue was added to the 7 flasks via volumetric pipet. Other reagents including K2HPO4, NaHPO4 and NaOH were added though volumetric pipets as instructed in the table below:

If you noticed when you take your clothes out of the dryer, there is also some clothes that don’t stick together like the others do. Why don’t those stick together also? The same charges repel from each other and the same charges repel. Neutral objects attract to any charge both positive and negative. When the clothes get charged the

First used as a way to dispose of livestock; during alkaline hydrolysis lye and water are combined to break down the body into liquid and small pieces of bone. Also called digestion this concept is beginning to be used for humans as well. Although some see alkaline hydrolysis method as strange, it is the most effective version of cadaver disposal; therefore alkaline hydrolysis method should replace the more common burial methods.

Fluorine Proteins’ advantage on transgenic organisms are important for agriculture. The farmer used Fluorine Proteins to perform “in vivo” tag to identify breeding for animals. For example, Fluorine Proteins chickens, pigs and cattle are served as marked for transgenes. Although Fluorine Proteins used to create lots of GMO products and its increase the commercial stock, the GMO products( like cereal, can food, frozen food...) cause potential health risks for human bodies (Stoffel). Health risks from GMO products can be gluten disorder, food allergy, birth defect and even cancer (Burke). Therefore, customers should be more careful about daily foods.

The good results obtained with the epoxy crosslinked enzymes encourages us to make a step forward and implemented the method for magnetic CLEAs. Magnetic CLEAs have the advantage over the CLEAs of being directly removed from the reaction medium with a magnet avoiding centrifugation steps. The procedure was the same as the CLEAs but including amino derivatized magnetic particles to crosslink with the protein, resulting in protein and magnetic particles aggregates. The precipitants selected for this assays were ammonium sulfate as it works for the normal CLEAs and a 50 % PEG 6000 (polyethylene glycol with an average molecular weight of 6000) solution. PEGs are well known protein precipitants, they adsorb water dehydrating the proteins and precipitating

The actual combination of properly prepared amino acid/peptide compounds and minerals is not 100% complete with simple tank mix procedures.

In wastewater treatment, coagulation and flocculation are employed to separate suspended solids from water. Although the terms coagulation and flocculation are often used the single term "flocculation" is used to describe both; they are, in fact, two distinct processes. Finely dispersed solids (colloids) suspended in wastewaters are stabilized by negative electric charges on their surfaces, causing them to repel each other.

According to the research work on a high viscous binder detergent granulation system of LAS (high viscosity binder) and zeolite carried out by Rough et al (2005), they found that at a higher impeller speed, size distribution had the same peak modal diameter, a narrower peak width and less vol% of bigger granule diameter. Comparing findings from Rough et al (2005) detergent granulation with pharmaceutical granulation of lactose and PEG melt (low viscosity binder) carried out by Schaefer et al (1993), Schaefer et al (1993) reported a larger peak modal diameter and a narrower size distribution at higher speed. Heng et al (2000) suggested that at higher impeller speed with increased shear forces, rate of granule consolidation should increase as surface plasticity and

These amorphous and metastable polymorphs can be formed in the spray dryer. Since a spray drying quickly evaporates the

Nowadays, the most common commercially FO membrane has been the asymmetric CTA membrane. In spite of the CTA membranes have proper characteristics that including high chlorine resistant and high hydrophobicity, they possess some drawbacks that hinder the future development. The CTA membranes have limited stability to pH, temperature and microorganisms. Accordingly, the feed and draw solutions must be maintain at pH between 4 and 6 and temperature below

Monodisperse sub-200nm polystyrene nanoparticles were synthesized by a facile one-step emulsion polymerization technology using sodium dodecyl sulfonate (SDS) and 2, 2′-azobis (2-methylpropionamide) dihydrochloride (AIBA) as the surfactant and initiator, respectively. The in situ neutralization between negatively charged surfactant SDS and positively charged AIBA was used to control the primary particle (or swollen micelle) volume and the extent of the particle coagulation. As the oligomeric radicals with cationic AIBA chain ends were captured by anionic swollen micelles, the electrostatic stability of swollen micelles gradually reduced, further promoting the primary particle coagulation. As a result, the initial particle number decreased with the addition of AIBA. The earlier primary particle coagulation not only enlarged the particle size, but also narrowed the particle size distribution of the final latex particles. This approach was easy to scale-up as a facile industrial technology to produce monodisperse polymeric nanoparticles on large scale.

Particles at fluid interfaces are very common both in nature and technological process such as food science, biomaterials and biomedicine. Constraint of particles at fluid interfaces has lead to a critical study. This research pays attention on fundamental problems of soft matter in order to develop new processes and products.