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METTLER TOLEDO is pleased to announce publication of a new white paper entitled “Metal Catalyzed Transformations.” As part of METTLER TOLEDO’s Recent Advances in Organic Chemistry series, “Metal Catalyzed Transformations” covers academic examples where in situ spectroscopy supplied critical but hard-to-obtain reaction parameters in a time- and resource-saving way. The paper is available for free download at www.mt.com/webaddress?.
Authored by METTLER TOLEDO’s Adrian Burke and Dominique Hebrault, “Metal Catalyzed Transformations” reviews four recent academic examples where METTLER TOLEDO’s ReactIRTM in situ spectroscopy quickly supplied key reaction parameters—some of which had been lacking using other methodology—to researchers in highly usable graphic formats. ReactIR also allowed results collection in fewer experiments saving researchers’ time as well as materials cost.
Defining reaction start and end points—and ensuring reaction completeness—has historically presented a challenge to researchers in both academia and industry. However, IR spectroscopy, such as METTLER TOLEDO’s ReactIR, has been shown to help researchers describe mechanisms, pathways and kinetics of critical catalytic reactions. “The ability to thoroughly define these parameters is increasingly important due to the large number of complex manufacturing processes that rely on metal catalysts, which can be scarce, expensive, or both,” said Mr. Burke, head of Software and Segment Marketing for METTLER TOLEDO AutoChem. “Better process definition means more reliable reactions as well as reduced materials costs.”
The paper highlights the contexts in which ReactIR answered key reaction questions. In the first three studies, ReactIR was used to analyze reaction time-to-completion, the structure of reaction intermediaries, and reaction rate & mechanism, respectively. The fourth and final study demonstrated the power of combining structural information offered by the functional specificity of mid-IR with the kinetic information gained from in situ reaction-rate monitoring: Researchers determined that formation of an unexpected intermediary was negatively affecting racemization.
ReactIR in situ spectroscopy was shown to provide valuable information that enabled full description of the complex reactions. Results also proved complementary to other structural data such as NMR. Finally, the combination of ReactIR with METTLER TOLEDO’s iC KineticsTM software created a more robust methodology that allowed the study of reaction kinetics using fewer experiments than more traditional approaches.
“We hope this paper demonstrates how ReactIR in situ spectroscopy, when used either on its own or with other technologies, can help clarify reaction parameters in both academic and industry environments and ultimately promote more accurate, predictable and cost-effective manufacturing,” concluded Mr. Burke.
For more on ReactIR spectroscopy, or complementary technologies such as iC Kinetics or METTLER TOLEDO’s EasyMaxTM, please visit www.mt.com/autochem. To download the white paper itself, please visit www.mt.com/addressMETTLER TOLEDO is pleased to announce publication of a new white paper entitled “Metal Catalyzed Transformations.” As part of METTLER TOLEDO’s Recent Advances in Organic Chemistry series, “Metal Catalyzed Transformations” covers academic examples where in situ spectroscopy supplied critical but hard-to-obtain reaction parameters in a time- and resource-saving way. The paper is available for free ...
(source : user amr on 01.04.2012)(source : user amr on 01.04.2012)
Life is a mystery, Life is a secret.
Live it free, Without any regret.
After every dark night, There shines a sun.
So forget your worries, And enjoy the fun
Duct Tape to Remove Warts
In 2002, a group of doctors compared duct tape’s effectiveness with liquid nitrogen in removing warts. After two months of wearing duct tape on a daily basis and using a pumice stone about once a week to exfoliate the dead skin, 85 percent of patients’ warts were gone, whereas freezing only removed 60 percent. “The question is whether there is something in the chemical adhesive itself, or if the occlusion (suffocation) causes the destruction of the wart,” says New York City–based dermatologist, Robin Blum, MD. “The other thinking is that the duct tape causes irritation, which stimulates our body’s immune cells to attack the wart.” Photo: Thinkstock
Vapor Rub to Cure Nail Fungus
While there are no studies to prove coating infected toenails with vapor rub once or twice a day is an effective treatment for nail fungus, a basic Internet search results in a number of personal testaments to the medicinal ointment’s fungus-killing powers. “I’ve heard many patients say that vapor rub does help, but I’m not exactly sure why,” Dr. Blum admits. While some argue it’s the menthol in the balm that kills the fungus and others say it’s the smothering effect of the thick gel, if used consistently, vapor rub has been shown to get rid of not just the fungus, but the infected toenail, too, which will turn black and eventually fall off. When the new nail grows in, it should be fungus-free. Photo: Thinkstock
Oatmeal to Soothe Eczema
“This is absolutely true, as oats have anti-inflammatory properties,” Dr. Blum says. Whether it’s used as a paste or poured into a bath, most experts recommend choosing colloidal (finely ground) oatmeal and soaking the affected area for at least 15 minutes. In addition to reducing inflammation, oats are thought to have an antihistamine effect, Dr. Blum says. By lowering levels of histamine, which triggers inflammation as part of the immune system’s recovery response, she explains, oats prevent or reduce the redness. Photo: Thinkstock
Yogurt to Cure Bad Breath
Bad breath comes from a number of places, the two most common being the mouth and the stomach. The neutralizing powers of yogurt and other probiotics treat the latter cause. “Yogurt shouldn’t have any effect at all on the bacteria that live on the tongue because it’s not there long enough,” says Robert Meltzer, MD, a New York City–based gastroenterologist and attending physician at Lenox Hill Hospital. However, it likely has a neutralizing effect on the acid that resides anywhere between the mouth and the stomach, including the back of the throat and the esophagus, he explains. “I think almost any milk product or food that contains live cultures would have the same effect.” While yogurt can get rid of bad breath that results from gastrological conditions, like acid reflux, it won’t have any real effect on bad breath that is the product of gum, liver or lung disease, says Ohio-based dentist Matthew Messina, DDS. Photo: Thinkstock
A Spoonful of Sugar to Cure Hiccups
In 1971, Edgar Engelman, MD, conducted a study to find out if a spoonful of sugar really is an effective cure for hiccups. He assembled a group of 20 patients who had been experiencing intractable hiccups for more than six hours, eight of whom had had them anywhere from a full day to six weeks. Each of the test subjects was given one teaspoon of white granulated sugar to swallow dry, and for 19 of the 20 hiccup patients, the cure was immediate. André Dubois, MD, a gastroenterologist in Bethesda, Maryland, noted in The Doctors Book of Home Remedies that “the sugar is probably acting in the mouth to modify the nervous impulses that would otherwise tell the muscles in the diaphragm to contract spasmodically.” Photo: iStockphoto
Bite a Pencil to Cure a Headache
While doctors aren’t sure why we do it, clenching our teeth is a common side effect of stress. According to Fred Sheftell, MD, director of the New England Center for Headache in Stamford, Connecticut, when we clench up, we strain the muscle that connects the jaw to the temples, which can trigger a tension headache. By placing a pencil between our teeth—but not biting down—we relax our jaw muscles, which eradicates tension and reduces pain. Just remember, the remedy really only applies to tension headaches—not migraines or headaches caused by sinus pressure, etc. Photo: Thinkstock
Olives for Motion Sickness
According to the National Library of Medicine, there are a number of symptoms that present themselves as a result of motion sickness, including increased salivation, which is the body’s way of protecting the teeth from the high doses of acid accompanied by vomit. Enter olives, which contain tannins that, when released in the mouth, work to dry saliva—first eliminating the symptom and then the body’s instinct to follow suit. However, the treatment is only effective during the early stages of nausea, when the salivation changes first appear. Photo: Thinkstock
Gargle Salt Water for a Sore Throat
When you were a kid and had a sore throat, your mom likely made you gargle warm water with salt in it…and she was definitely on to something. According to Douglas Hoffman MD, PhD, author of the website The Medical Consumer’s Advocate, a sore throat is an inflammatory response of the infected tissues, and the salt helps draw out the excess fluid to temporarily decrease swelling and the pain it causes. Most remedies call for a ratio of 1 tablespoon salt to 8 ounces of water, but it’s always better to opt for more salt rather than less. Just keep in mind that you are treating the symptoms—not the illness. As Dr. Hoffman notes on his website: “The relief is very real, but also tends to be short-lived, since the gargle has done nothing to remove the cause of the sore throat.” Photo: Thinkstock
Read more: Health Tips – Home Remedies That Work at WomansDay.com – Woman’s Day
(source: http://www.stumbleupon.com/su/653uBq/www.womansday.com/health-fitness/8-home-remedies-that-actually-work-115675/)Duct Tape to Remove Warts In 2002, a group of doctors compared duct tape’s effectiveness with liquid nitrogen in removing warts. After two months of wearing duct tape on a daily basis and using a pumice stone about once a week to exfoliate the dead skin, 85 percent of patients’ warts were gone, whereas freezing only ...
Lord mahavir (Sanskrit महावीर, Kannada ಮಹಾವೀರ and Tamil அருகன்(“Arugan”) means “Great Hero”, traditionally 599–527 BCE) is the name most commonly used to refer to the Indian sage Vardhamana (Sanskrit: वर्धमान ) who established what are today considered to be the central tenets of Jainism. According to Jain tradition, he was the 24th and the last Tirthankara. In Tamil, he is referred to as Arugan or Arugadevan. He is also known in texts as Vira or Viraprabhu, Sanmati, Ativira,and Gnatputra. In the Buddhist Pali Canon, he is referred to as Nigantha Nātaputta.
(continued at : http://en.wikipedia.org/wiki/Mahavira )Lord mahavir (Sanskrit महावीर, Kannada ಮಹಾವೀರ and Tamil அருகன்(“Arugan”) means “Great Hero”, traditionally 599–527 BCE) is the name most commonly used to refer to the Indian sage Vardhamana (Sanskrit: वर्धमान ) who established what are today considered to be the central tenets of Jainism. According to Jain tradition, he was the 24th and the last ...