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Prince Synthetic Gut
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 Prince Synthetic Gut Duraflex 16G Black  US $4.75
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 Prince Synthetic Gut Original 16G White US $4.25
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Featured Article:
Strings have been one of the hottest topics of discussion on the pro tour in recent years. Most specifically how the Luxilon strings have become such powerful method of improving player performance. Darren Cahill, the long time coach of Andre Agassi, recently commented that by converting his racquet to a Luxilon blend - Andre was able to improve his spin and control dramatically in the later part of his career, extending his playing days until eventually his back gave way.
This new string technology will also improve the performance of developing and social players.
Natural Gut
For decades Natural Gut string was the preferred string for top professionals. Babolat VS Natural Gut had achieved legendry status as the choice of legends such as Pete Sampras. Natural Gut delivered great "feel" and comfort for the best players. It did however have drawbacks; it wasn't very durable and would lose tension relatively quickly. For social tennis players it was out of reach due to high prices so it was only the privileged few who were able to use it.
Luxilon
More recently players have however turned to the Luxilon strings in great numbers. Luxilon is a "coated poly"; it is durable, maintains its tension and delivers incredible spin and control to its users. Most of the top players from Federer to Nadal to Henin use Luxilon in their string bed. Other companies have attempted to create string with similar qualities to Luxilon - not quite reaching the magic formula - but providing cheaper alternatives.
Hybrid String Patterns
A popular practice with top players is to "blend" their string pattern, using a different string on the mains and the crosses. Federer, for example, uses a blend of Luxilon and Natural Gut. The aim is to get the best of both world's, the feel of Gut and the durability and spin of Luxilon. This method is highly recommended for players looking to improve their game.
A major hurdle for the developing and social player is the cost of both Luxilon and Natural Gut string. Fortunately cheaper alternatives are available which offer similar characteristics; if not quite the same performance.
All companies will have their own version of Synthetic Gut, which is designed to have similar characteristics of Natural Gut - providing power and a "soft feel." By spending a little extra you may experience even better performance by stringing with a "multi filament" string. "Head Rip Control", "Prince Syn Gut Multifilament", "Wilson NXT" and "Klip Excellerator" are examples of multifilament strings which deliver Natural Gut like characteristics without the cost.
Different tennis companies have also begun producing Luxilon type "coated poly" strings providing extra spin and durability. "Klip K-Boom", "Head Sonic Pro" and "Kirschbaum Super Smash" are strings which imitate the qualities of Luxilon at a lower price.
Customising your racquet and string
When considering your string specifications it is also important to consider the type of racquet you use. Although technology is always improving, generally speaking racquets, like strings, are usually designed for power; or control. Using an entirely "poly" string bed in a racquet with a tight string pattern (18 mains, 95 sq inch frame) may result in a dead feeling. Conversely using a soft synthetic gut string in a wide string pattern (16 mains, 110 sq inch frame) may adversely affect your control.
Conclusion
Using a Luxilon type "poly" string in the mains and a softer "Gut" string in the crosses is a great way to get the best stringing results. Stringing entirely with a softer "gut" type string can result in broken strings and losing tension quickly. Only stringing with a "poly" can make the racquet feel stiff and uncomfortable.
If you have the budget, string your mains with Luxilon and cross with Natural Gut in a blend. You can still get great results using the cheaper options recommended in this article. This will work in all types of racquet frames and deliver the all round improvement everyone is seeking.
You may however decide you need particular upgrading in certain aspects of your game - more spin, or durability, or comfort or power. In this case you may use exclusively "poly" (more spin and durability) or "gut" (power and comfort). The most important thing is taking advantage of this revolution in strings - they can and will improve your game!
By Rufus Keown
Club Professional Coach
BBus (Mgt), Grad Dip Sport Mgmt
Co-founder http://www.globalsportscoaching.com
Genetically Modified Food: The Benefits and the Risks
Background Genetically modified foods or GM foods for short, also go under many different names, including transgenic food, genetically engineered food or biotech food.
So what are GM foods? Although different people and groups have different definitions, GM foods can broadly define as foods that "are produced from crops whose genetic makeup has been altered through a process called recombinant DNA, or gene splicing, to give the plant a desirable trait." The modification is usually done in the lab using molecular techniques or genetic engineering although there are others who would argue that crops produced through conventional breeding can also be considered as GM food.
The first GM food crop, a tomato developed by Montsanto was submitted for approval to the US FDA in August 1994 and came into market in the same year. As of September 9, 2008, a total of 111 bioengineered food products have completed the US FDA "consultation procedures" on bioengineered foods. In addition to the tomato, the range of products includes soybean, corn, cotton, potato, flax, canola, squash, papaya, radicchio, sugar beet, rice, cantaloupe, and wheat. According to estimates by the Grocery Manufacturers of America, "between 70 percent and 75 percent of all processed foods available in U.S. grocery stores may contain ingredients from genetically engineered plants. Breads, cereal, frozen pizzas, hot dogs and soda are just a few of them."
The benefits of GM foods. Support for GM foods come from different sectors: scientists, economists, and understandably from the agricultural and food industries.
GM foods can fight world hunger. The world population has reached an all-time high of over 6 and a half billion. Over 20% of these are suffering from poverty and hunger. That GM foods can stop hunger is one of the noblest motivations behind the development of GM foods. GM foods supposedly are easier to grow and bring higher yields. In poverty-stricken parts of the world, higher yields can save millions of lives and bring much-needed economic benefits. In a review, Terri Raney of the United Nations says "...the economic results so far suggest that farmers in developing countries can benefit from transgenic crops..."
GM crops are better. GM crops are designed to be sturdier and more robust than their non-modified cousins. They are meant to be resistant to drought, diseases, and pests. The Hawaiian papaya industry, for example, only managed to survive a virus epidemic after the introduction of more resistant transgenic varieties.
GM foods have been with us for hundreds of years. The wide variety of many plants that we see today came about through natural as well as traditional man-made plant cross-breeding that took thousands of years. That is peppers come in different shapes, colors, and taste, from the very spicy hot to the sweet types. That is why we have more than 1000 different types of tomatoes.
GM foods can fight malnutrition. In a world suffering from malnutrition, GM foods can answer the need for more nutritious food. To cite an example, Swiss research strove to create rice strains that contain large amounts of beta-carotene and iron to counteract vitamin A and iron deficiency. Malnutrition can refer to both undernutrition and wrong nutrition. People in rich and developed countries may have more than enough food but not the proper nutrition necessary to keep them healthy. For this reason, researchers at the European-funded FLORA project have developed strains of fruits and vegetables with enhanced content of antioxidants. Through genetic engineering, FLORA oranges have higher than normal flavonoids and phenolics. The FLORA purple tomatoes have three times the amount of the antioxidant anthocyanins compared to normal tomatoes.
GM foods are good for the environment. The damage to the environment that insecticides such as DDT bring about is well-known. The use of synthetic fertilizers in the farmlands led to the eutrophication of rivers and lakes all over the world. GM foods translate into less use of pesticides, herbicides and fertilizers, and therefore less pollution.
GM foods can help medicine. GM foods can be used in producing pharmacological products in the so-called "medical molecular farming: production of antibodies, biopharmaceuticals and edible vaccines in plants." FLORA stands for "flavonoids and related phenolics for healthy living using orally recommended antioxidants" and it sees it self as "a player in the future of medicine." As early as 2005, Indian researchers reported the potential use of transgenic bananas in carrying vaccines against hepatitis B. In the same year, the biotech company GTC Biotherapeutics based in Framingham, Massachusetts has developed a herd of genetically modified goats that produce milk which contains a human anticoagulant called anti-thrombin.
GM foods are safe. The creators of GM crops are quick to assure that GM foods are safe and pose no threat to human health. GM crops are regulated by three agencies: the US Department of Agriculture (USDA), and the Environmental Protection Agency (EPA), and the US FDA. "The FDA ensures that foods made from these plants are safe for humans and animals to eat, the USDA makes sure the plants are safe to grow, and the EPA ensures that pesticides introduced into the plants are safe for human and animal consumption and for the environment. While these agencies act independently."
According to the US FDA, "bioengineered foods do not pose any risks for consumers that are different from conventional foods ... We make sure there are no hazards, such as an unexpected allergen or poisonous substance in the food, or that the food is not changed in some way that would affect its nutritional value."
The issues against GM foods.
The opponents of GM foods may be scientists, environmentalists, and of course consumer groups. In addition, many celebrities are openly anti-GM, thus setting role models for the public. Among the most well-known and outspoken GM sceptic is Charles, England's Prince of Wales.
GM foods are for profit. According to its opponents, GM foods were created for profit and nothing else. They cite the multinational giant Monsanto, a pioneer in GM research and owns the infamous Roundup crops. Companies like Monsanto are unlikely in the GM business for purely noble reasons.
GM foods are unregulated. The use of GM foods in the world is almost an unregulated free-for-all activity. Going through the US FDA consultation procedures is mainly voluntary. Anti-GM advocacy groups and concerned scientists are asking for more controls and regulations.
There are also reports of GM plants escaping field trials and finding their way to the natural environment, thousands of miles away. In 2006, rice which contained genes from the bacteria Bacillus thuringiensis (the notorious Bt) found its way to European supermarkets, causing a big outcry. The bacterial gene rendered the rice resistant to insects and the transgenic rice was a test plant that has not yet been approved for human consumption.
GM foods can harm the environment. GM foods are affecting their environment and some of these effects might actually be harmful. The effects are especially evident in other living organisms within the vicinity.
There are concerns, for examples, how cross-pollination with pollens from GM plants can affect non-GM plants.
Resistance development is another major issue. In China, for example, researchers used antibiotic-resistance marker genes to derive resistant transgenic rice strains. There are concerns that the marker genes will be taken up by naturally occurring gut bacteria and lead to resistant, more pathogenic strains.
Other studies also point to possible effects on animal life such as insects which are closely interact with the GM plants. One of the most well-known incidences was the claims that pollens from transgenic corn plants with Bt insecticidal gene markers are adversely affecting monarch butterflies in North America. Although experts say that the butterflies were safe from Bt, environmentalists were not satisfied.
GM foods can be detrimental to human health. The main concerns about adverse effects of GM foods on health are the transfer of antibiotic resistance, toxicity and allergenicity. With genetic modifications come new compounds in the crops which we virtually know nothing about. These compounds may be in the form of allergens and little-known proteins whose effects to human health are difficult to predict. In the food chain, this can even affects animals fed by GM crops and slaughtered for human use.
GM foods are not better. Western Europe is a stronghold of anti-GM movement. A European study last year declared that organic foods - which are exclusively non-GM-, are definitely better and more nutritious than their non-organic counterparts.
Which way do we go? The risks versus benefits of GM food are not an easy issue to settle. There is an urgent need for increasing food production and GM foods seem to be in the best position to address this need. In the short-term, GM foods are probably the solution to food shortage.
Currently, there is not enough scientific evidence to support the possible risks of GM foods. However, like in most things new and innovative, the long-term benefits and adverse effects can only be speculated upon.
Responsibility should be on the scientists, the health authorities, and the industries to act responsibly and to be as transparent as possible.
About the Author
The article providing the Pros and Cons on Genetically Modified Foods may be found in it's entirely with references and links on http://HealthWorldNet.com .
Should i Choose String Ports or String Holes for o3 Black speedport?
I play with prince synthetic gut regular (usually with duraflex) at 16 guage. The string is at a 59 pound tension.
Should i use string port or string holes? Why?
actually, its string ports= more power, string holes= more control.
String ports give you more power via bigger sweetspot.
How much control do you sacrifice for a string port?
My friend has a Prince O3 black. I believe the string ports that you install into the racket will give you more control. The string holes that comes standard gives you more power. So choose either to install the string port base on your playing style. Good luck 
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