Ethylene

minute compared to one hundred barrels per minute with polyacrylamide. The increased pumping rate allows for microfractures to be created in the shale. Other chemicals used in slickwater fracturing are butanol, monobutyl ether, hydrochloric acid and ethylene glycol. Also up to five million gallons of water are used per operation (Hyder and Lerner 2250). By 2010, approximately sixty percent of new oil and natural gas wells use hydraulic fracturing (“Fracking” 1004). Today, about ninety…

centrifuged at 1500 × g for 10 min to obtain serum (Schaeffer et al, 2000). The resultant serum was aliquoted into RNase/DNase-free tubes and stored at -80°Cuntil RNA extraction. For the separation of plasma, about 2.5 ml blood was added into potassium-ethylene-diaminetetraacetic acid (K2-EDTA)coated tubes. Plasma was separated by centrifugation at 1,000xg for 10 minutes at 4˚C to remove blood cells, followed by centrifugation of the supernatant at 14,000 x g for 10 minutes at 4˚C to remove…

Pest infestation is one problem which could not go away easily and even after many efforts householders would find insects like bed bugs crawling back into the house without care or concern. Bed bugs are the most hated pets and are causatives to ailments like allergies, insomnia and several psychological problems. It is very difficult to terminate them permanently and even companies offering bed bugs removal in Toronto cannot completely guarantee their extinction in the treated house. Although…

stating that plastic was once considered a green product, due to the fact that it would save precious resources such as ivory and tortoise shells. The call to invent a material with the qualities of plastic was mainly due to the necessity of reducing ethylene gas, a major waste product, from the oil refining process and making it into polyethylene. Polyethylene is the most commonly used…

structure as histamine . These H1 antihistamines constitute the second most commonly used class of medications after antibiotics and there are many varieties used in different conditions . H1 antihistamines are classified into six groups: ethanolamines, ethylene diamines, alkylamines, piperazines, piperadines, and phenothiazines . Since this classification is of limited clinical relevance, H1 antihistamines are also being classified as first- and second generation. First- and second generation…

membrane, which consist thermoplastic polyolefin top fly compound, TPO polymer base and polyester-reinforced fabric center. TPO fabric also uses fillers made out of carbon fiber, Metal Oxy Sulfate, wollastonite and fiberglass as well as EPDM and ethylene-propylene rubber. The TPO membranes can only be installed on flat or near flat roofing surfaces to create a water runoff and prevent leaks. The growing popularity of TPO roofing has seen many commercial building owners replace the older and less…

The first scanning electron microscope (SEM) was invented by Manfred von Ardenne in 1937 (McMullan). However, further development of the SEM was accomplished by Charles Oatley and his colleagues at Cambridge University (McMullan; Egerton 17). He and his colleagues acquired their first images from the SEM in 1951 (Egerton 17). The SEM was developed because if a TEM is utilized, a specimen must be made extremely thin to prevent the electrons from dispersing inside the specimen and so the electrons…

sachets are highly effective and can reduce moisture, oxygen, ethylene and CO2 levels in a package to as low as to ppm levels. However, when dealing with food, scavenging sachets must be safe, easily to use, should not come in direct contact with the food material, compact in size and must not produce toxic substances or offensive odors/gases (Smith et al., 1995). They also must absorb a large amount of targeted substance (e.g. oxygen, ethylene etc.) with an appropriate absorption speed and…

MST 313 Semester Project Progress report 1 Wheelchair-friendly Carousel for children fig 1. A sketch of the carousel (Pretorius, 2015) Bernadine Pretorius 28302207 Armand Meyer 10026305 Erica Davison 12064212 Target Market: The design of this wheelchair friendly carousel is targeted at children who are physically disabled and unable to use more conventional jungle gyms/outdoor toys. This carousel can be designed to be part of an indoor playground and can also become inclusive…

Today, increasing prevalence of kidney stones is a global phenomenon due to change in living conditions and lifestyle. The urinary stone disease is a common multifactorial disorder estimated to occur in approximately 12% of the world population with a recurrence rate of 70-80% in male, and 47-60% in female (Araujo V., et al., 1999). Kidney stone disease is the third most common afflictions in urinary tract found in humans (Selvam et.al. 2001). Primary kidney stone formation and its recurrence…