what is phacoemulsification
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Phacoemulsification Phacoemulsification refers to modern cataract surgery in which the eye 's internal lens is emulsified with an ultrasonic handpiece and aspirated from the eye.Aspirated fluids are replaced with irrigation of balanced salt solution, thus maintaining the anterior chamber, as well as cooling the handpiece.hacoemulsification refers to modern cataract surgery in which the eye 's internal lens is emulsified with an ultrasonic handpiece and aspirated from the eye.
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In the digestion of fats, what do emulsifiers act as? The emulsifying agents are a natural detergent molecule and do much the same job as the detergents used in washing up liquids - the main digestive emulsifying agent are bile salts, produced by the liver and secreted in bile into the intestines in response to fat being present in the intestines. Murph · 9 years ago.
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Transesterification In organic chemistry, transesterification /ˌtraenzˌɛstərɨfɨˈkeɪʃən/ ˌtrænzˌɛstərɨfɨˈkeɪʃən is the process of exchanging the organic Group″ r of an ester with the organic Group′ r of an. Alcohol these reactions are often catalyzed by the addition of an acid or base. catalysthe reverse reaction, methanolysis, is also an example of transesterification. This process has been used to recycle polyesters into individual monomers (see plastic recycling). It is also used to convert fats (triglycerides) into biodiesel.
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Emulsifiers in food Emulsifiers are the chemicals that make emulsions happen. Nature uses proteins and phospholipids, and many emulsifiers used in modern food production are based on these natural substances. An emulsifier is a molecule in which one end likes to be in an oily environment and the other in a water environment. To make an oil-in-water emulsion, such as mayonnaise, droplets of oil molecules are surrounded by the oil-loving end of the emulsifier molecules.
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shoppingThe Best Oven Brands The Best Oven Brands. List Criteria: Vote up and add all of your favorite brands for ovens. List of oven brands that include the most reliable models available. Oven manufacturers include those from major makers of home appliances, including GE, Sharp, Samsung and more.he Best Oven Brands. List Criteria: Vote up and add all of your favorite brands for ovens. List of oven brands that include the most reliable models available. Oven manufacturers include those from major makers of home appliances, including GE, Sharp, Samsung and more.
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What Does Emulsify Fats Mean? Egg whites help emulsify fats and water-based liquids in certain recipes. Emulsification is a process by which you mix two liquids that normally do not mix well together. Emulsification of fats allows you to mix them with water-based substances, which has important implications for cooking and for digestion. To emulsify fats, you need substances such as bile salts or other compounds that help connect the fat and water.
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- Phacoemulsification for cataracts. Definition. Phacoemulsification cataract surgery is a procedure in which an ultrasonic device is used to break up and then remove a cloudy lens, or cataract, from the eye to improve vision. The insertion of an intraocular lens (IOL) usually immediately follows phacoemulsification.
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emulsion 2. (Chemistry) chem a colloid in which both phases are liquids: an oil-in-water emulsion. 3. (Chemistry) Also called: emulsion paint a type of paint in which the pigment is suspended in a vehicle, usually a synthetic resin, that is dispersed in water as an emulsion. It usually gives a mat finish. 4. (Pharmacology) pharmacol a mixture in which an oily medicine is dispersed in another liquid.
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Saponification Definition and Reaction Saponification is the alkaline hydrolysis of the fatty acid esters. Example: The chemical reaction between any fat and sodium hydroxide is a saponification reaction. triglyceride + sodium hydroxide (or potassium hydroxide) → glycerol + 3 soap molecules.
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- Since fat is. insoluble in water, emulsification is required for the. digestion of fat in an aqueous medium as it exists in the GIT. This emulsification leads to the organization of dietary. lipids in the form of droplets in the aqueous digestive. system (Carey et al., 1983; Øverland et al., 1993). Digestion. of dietary triacylglycerols starts in the stomach with the. action of gastric lipase at the lipid-water-interface.
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- An emulsifier allows for miscibility between two substances that do not normally mix together. An example of this is the lecithin in egg yolk, which is used to allow the oil and vinegar to mix together to form an emulsion.
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Emulsifying Wax Emulsifying waxes are created when a vegetable wax is processed with a detergent like sodium dodecyl sulfate. This procedure causes oil and water to bind and form into an emulsion and thus an emulsifying wax is created.mulsifying wax is considered to be as a cosmetic emulsifying agent. The word is often followed by the initials NF. This means that the wax conforms to the specification of a governing body that is called the National Formulary.
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What is the importance of emulsification in digestion of lipids? In digestion, lipids start out as large globs that are hard for enzymes to get to and for the body to absorb. The bile salts aid in emulsification, meaning that they break down the big glob into smaller ones. This way, the lipases have more surface area to work on. Remember, in biology, more often than not the key is to increase surface area! Lipids are fatty materials which are not soluble in water(e.g.
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emulsify to disperse a liquid into another liquid with which it is immiscible, making a colloidal suspension. Soaps and detergents emulsify by surrounding small globules of fat, preventing them from settling out. Bile acts as an emulsifying agent in the digestive tract by dispersing ingested fats into small globules. emulsification, n.
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Transesterification Transesterification: alcohol + ester → different alcohol + different ester. Strong acids catalyse the reaction by donating a proton to the carbonyl group, thus making it a more potent electrophile, whereas bases catalyse the reaction by removing a proton from the alcohol, thus making it more nucleophilic.he reverse reaction, methanolysis, is also an example of transesterification. This process has been used to recycle polyesters into individual monomers (see plastic recycling). It is also used to convert fats (triglycerides) into biodiesel.
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- Definition Phacoemulsification cataract surgery is a procedure in which an ultrasonic device is used to break up and then remove a cloudy lens, or cataract, from the eye to improve vision. The insertion of an intraocular lens (IOL) usually immediately follows phacoemulsification.
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Cataract surgery There are a number of different surgical techniques used in cataract surgery: 1  Phacoemulsification (phaco) is the most common technique used in developed countries. It involves the use of a machine with an ultrasonic handpiece equipped with a titanium or steel tip.
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- A process hazard analysis (PHA), or evaluation, is one of the most important elements of the process safety management program. A PHA is an organized and systematic effort to identify and analyze the significance of potential hazards associated with the processing or handling of highly hazardous chemicals.
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Emulsifying wax Emulsifying wax is created when a wax material (either a vegetable wax of some kind or a petroleum-based wax) is treated with a detergent (typically sodium dodecyl sulfate or polysorbates) to cause it to make oil and water bind together into a smooth emulsion.It is a white waxy solid with a low fatty alcohol odor.mulsifying wax is created when a wax material (either a vegetable wax of some kind or a petroleum-based wax) is treated with a detergent (typically sodium dodecyl sulfate or polysorbates) to cause it to make oil and water bind together into a smooth emulsion.
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- Phosphate pre-treatment is the most commonly overlooked step in preparation for coating. The generic term phosphating is a process where an acid attacks the metal of the work piece and re-deposits a material that is a combination of the metal substrate (and other metals-like zinc) along with phosphate.
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How Can a Loving God Send People to Hell? The Bible doesn't say that a loving God sends anyone to hell, and yet they do go to hell. But they don't go there because God sends them; it's the only place for those who have rejected Jesus Christ and have no capacity for God whatsoever.he thing that's going to send you to hell is that you're a sinner and you don't want to admit it. That's the problem with the human family. It's a self will, a desire to want to go their way. Yet God has provided a way for you to come. And any time you want to make the turn, a loving God will save you.
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- Not all compounds composed of hydrophilic and lipophilic can be used as emulsifiers. If hydrophilicity in a compound is greater than lipophilicity in it, the compound will disperse into water, while one with greater lipophilicity than hydrophilicity will disperse into oil.
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What Is An Emulsion? Emulsifying something means you’re either dispersing fat into water (mayonnaise, pan sauce) or water into fat (vinaigrette, butter) to make something with a uniform look and feel. In the case of the vinaigrette on your salad, you’re dispersing oil into water (vinegar is the water element here).
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Phosphate conversion coating The following is a typical phosphating procedure: 1  cleaning the surface. 2  rinsing. 3  surface activation. 4  phosphating. 5  rinsing. 6  neutralizing rinse (optional) 7  drying. 8  application of supplemental coatings: lubricants, sealers, oil, etc.
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What Does Emulsify Fats Mean? Emulsification of fats is also a critical part of digestion. Most of the fluid in your digestive tract is water-based, so when you consume fats, they tend to form large globules in your intestines. When the fat is in large globules, it is hard for the enzymes in your digestive tract to break down dietary fats. Large globules of fat are also poorly absorbed by your intestines. As a result, your body uses an emulsifier known as bile to break up these fat globules.
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Clinical Study Phacoemulsification cataract extraction was performed by one of two senior consultant surgeons via a temporal or superior clear corneal incision, as dictated by the orientation of existing astigmatism and/or the position and extent of trabeculectomy bleb.