The total antioxidant power of freshly prepared mixture of 25 types of dried tea leaves were measured according to ferric reducing/antioxidant power (FRAP) assay . Results showed that different teas had widely different in vitro antioxidant power and that the antioxidant capacity was strongly correlated with the total phenolic content of the tea. Expressed as mol of antioxidant power/g of dried tea leaves, values ranged as 132-654 µmol/g for black (fermented) teas, 233-532 µmol/g for Oolong (semifermented) teas, and 272-1144 µmol/g for green (nonfermented) teas. (Benzie et al., 1999).
Guohau Cao et al. 1996, measured the antioxidant activities of 22 common vegetables, one green tea, and one black tea using the automated oxygen radical absorbance capacity assay .The green and black teas of Camellia sinensis had much higher antioxidant activities against peroxyl radicals than all these vegetables. However, the Camellia sinensis teas also showed a pro oxidant activity ,which was not found with any of the vegetables studied.
Hui-YIN Chen et al,(2007) , examined the antioxidant activities and free radical scavenging effects of extracts of aqueous leaves of Psidium guajava L. (PE), Camellia sinensis (GABA tea; CE), Toona sinensis Roem. (TE) and Rosemarinus officinalis L. (RE). The antioxidant power of four nutraceutical herbs were in the order of PE>RE>CE>TE. The antioxidant activities of nutraceutical herbs were evaluated in a liposomes oxidation system promoted by Fe3+/ascorbic acid/H2O2.
Anna et al, 2010, research was to determine the antioxidant properties of green, black, Pu-erh, white teas and herbal infusions and the content of total polyphenols by using a Folin-Ciocalteu assay. It was observed that the antioxidant proprie...
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... commercially available different types of teas (premium black, flavored black, green, and fruit tea) and the infusions produced from them . Flavonoids were predominantly present as glycosides. Rutin was present at much higher levels in black and green teas.
Taheri, Mohammad etal.,2011 examined , antioxidant activity of hot water extract of white, green and black teas measured with three assays of DPPH, TPC and FRAP, showed antioxidant activity of white tea is more. Hot water extracts of green and black tea showed statistically significant antioxidant activities (P < 0.05). There has been seen no statistically significant difference between the antioxidant activities of black tea and tea wastes like barks and old leaves . It has been found that the antioxidant capacities of water extracts of green tea leaves were almost equivalent to water extract of white tea
The purpose of conducting an experiment using various temperatures, pH levels, and enzyme concentrations was to observe the effects these factors had on the rate of horseradish peroxidase activity. Furthermore, testing how peroxidase reacts to different set ambient conditions and finding the conditions that allow for maximum rates. Enzymes are used in this experiment to demonstrate the importance of certain environmental conditions since they affect the speed of an enzymatic reaction in order to carry out life. An extract from horseradish is used as the enzyme since it contains peroxidase which has a highly accessible active site. The experiment was administered by using a spectrometer as a tool to measure oxygen production using an indicator called guaiacol which would allow the rate of horseradish peroxidase activity to be seen. Environmental circumstances, such as enzyme concentration, temperature, and pH, are tested by using guaiacol as an indicator of oxygen production and H2O2 as an oxygen producing agent. The ending results conclude that higher enzyme concentration can increase the speed of the rate of enzyme activity. The results also conclude
Abstract: Different compounds were tested to see their ability to inhibit polyphenol oxidase and prevent the browning from ortho quinones of fruits and vegetables. Five compounds were tested to see which compound produced more brown product and which compound showed higher inhibition. The production of benzoquinone was tested through a 420 nm spectrophotometer. Compounds A and D showed the most inhibition for the production of benzoquinone.
First things first, coffee has antioxidants. Our bodies contain reactive molecules called free radicals. The free radicals have unpaired electrons that can severely damage important cell structures. Antioxidants including polyphenols and hydrocinnamic acids disarm free radicals by donating electrons. Antioxidants are protecting people against aging and disease that include oxidative stress. They are also important in health overall.
With a mixed berry flavor and anti-oxidants ingredients (such as vitamin C, A, D, E, Omega-3, Goji, Acai, blueberry and pomegranate) added to the energy giving ingredients, this drink is for those that are looking to glow from within by not only getting a boost of energy, but also having their vitamins in liquid form. The different berries and pomegranate present in this drink prove to be excellent antioxidants that help to improve hair and skin’s health. In fact Pomegranate is so popular that is considered the next big thing as David Karp said in his article Pomegranates For One And All: “Pomegranates, which contain high levels of antioxidants, have been reputed for millennia to have therapeutic properties, and recent medical studies convinced the Resnicks that the fruit could be the next big thing.”(1). In addition to pomegranate this drink contains equally beneficial such as Goji, Acai, black and blueberries, all with the sole purpose of creating a drink that no only gives consumers energy but also a healthy
Society is programed to feel very healthy, but if when actual regarding the statistics it would be surprising to the contrary. The modern healthcare system is flawed in its basic theology. It focuses on treating the main symptoms and not treating the root cause and preventing illnesses. To return to a healthier society, the medical care system needs that focuses more on holistic or the all of the systems that make up someone 's body. The needs to be a shift in the way medical professionals treat their patients it would create a superior society.
Green and Black tea have been effective at stopping herpes-1 (oral herpes) outbreaks. Geen and White tea have been shown to be effective against! suppressing herpes HSV-2 infection. Green Tea Extract contains high amounts of EGCG, which has been proven to be an immune system
In Japanese culture, there are many traditions that are passed down from generation to generation and done in the same way as their ancestors. One of these traditions is the Japanese Tea Ceremony. The Japanese culture takes pride in traditions like this because it shows their culture and how customs were done in the past. But are these traditions necessary in today’s fast paced culture? In present day society, culture and tradition seem non-existent to the public, but to some people these traditions are very well alive. I do not think that old customs or traditions such as the Japanese Tea Ceremonies are necessary in today’s society but I do think that they are very present to the ones who practice them.
The major catechins found in tea are EGCG, EGC, ECG, and EC. Previous studies have shown that they inhibit expressions of carcinogen activating enzymes and increase enzyme levels that detoxify carcinogens. In addition, studies have shown that tea polyphenols inhibit carcinogen-induced DNA damage in some cell lines. Other studies have shown that tea constituents inhibit cancer development and reduce the risk in animal models of stomach, colon, liver, skin, breast, and prostate cancer. In a study, extracts from tea exhibited a dose-dependent protection of Chang liver cells. In a co-treatment consisting of EGCG and bleomycin there was 50% decrease in comparison to the treatment of bleomycin alone. (Yang, et al,
The phenols present in Pumpkin Seeds inhibit these free radicals from causing harmful oxidative stress.
While tea is said to be healthier, it is the second most consumed morning beverage. Why is that? On an average day, only one in five American adults drink tea. The average tea drinker takes in more than twenty times more flavonoid antioxidants per day than non-tea drinkers. So those non-tea drinkers are missing out on their daily helping of flavonoid. Caffeine in tea isn't as much of an issue as it is in coffee.
Epigallocatechin-3-gallate (EGCG) is the most abundant and most biologically active catechin found in green tea. It is believed that EGCG possesses much of the health promoting properties of green tea, including anti-inflammatory, immunomodulatory and antioxidant effects. In 1999, Haqqi and colleagues first reported the disease modulating effects of green tea polyphenols (GTPs) on RA in a murine collagen-induced arthritis (CIA) model. They found the GTPs administration would significantly reduce the incidence and lower the disease severity of arthritis, associated with a marked reduction in the expression of IFN-γ, TNF-α, and cyclooxygenase(COX)-2, as well as total IgG and type II collagen-specific IgG (Ab) in arthritic joints. Later on, the therapeutic effects of green tea or EGCG have been consistently reported in series of experiments using either CIA or Adjuvant-induced arthritis (AIA) disease models. Interestingly, in a prospective cohort study with 31,336 subjects, Mikuls et al. reported that consuming tea >3 cups per day could significantly reduce the risk of RA
Green tea is made from the plant Camellia Sinensis’s leaves without fermentation (Suzuki, Miyoshi & Isemura, 2012) and is regarded as a popular and healthy drink in Asian countries because of its health-promoting potentials such as protecting against cancer and cardiovascular disease (Harvard Health Publications, 2012; Iwasaki et al., 2014). Lots of the positive effects are due to the antioxidative activity of (-)-epigallocatechin gallate (EGCG) which is a major component of green tea (Suzuki et al., 2012). And it draws researchers’ interests and attentions to further investigate. According to Suzuki et al., one example of the health advantages is that catechins in green tea bring an anti-obesity effect by stimulating lipid metabolism in liver (2012).
An effort has been made to do a comparative study on two tea selling companies so as to practically comprehend the consumer perceptions and choice of consumers on the two brands. A survey is done by providing with a questionnaire to a group of people of various ages who consumes tea.
Herbal products are medicinal agents obtained from the plants. It’s all started 100 years ago by ancient people. Since synthetic medicine are not yet invented by that time, ancient people had invented medicine out of the plants. Through generations the original herbal medicine had been modified due to the new knowledge discovered and technologies invented.
This clearly shows that the fruits and vegetables play a vital role in maintaining our good health. Fruits and vegetables are seasonal and grown in different parts of our country. They need to be stored for longer period and transported to different places. It makes necessary for us to find out whether there is any damage to the useful contents of the fruits and vegetable during the storage and transportation or due to some preservatives or other factors and what kind of nutrients, minerals, etc. are present in their juices. With this idea in mind, the project has been undertaken.