Archive for June, 2010
June 29th, 2010 | 
Author: Most of the elderly wear prescription glasses, regardless of the design and style, but if you are young adults, style and design really matters! If you are going to wear glasses, you might as well look good in them! Thus, if you are after chic-designed glasses at prices you can afford, Zenni: the #1 online eyeglasses store is your best stop! But don’t jump with joy yet, Opticians don’t want give you PD data., and without it you can’t have your corrected lenses made. For their own security, Opticians keep you away from ZenniOpt.
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A 1,000 square meter Urban Farming roof top green house can potentially produce 43,000 kilos of tomatoes a year. Since tomatoes are 95% percent water and 4% carbohydrate composition, this results in 1,720 kilos of carbohydrates. The general formula of carbohydrates is Cn(H2O)n or empirical values of CH2O. With Carbon at 12 Atomic units, Hydrogen at 2 atomic units and Oxygen at 16 atomic units for a total 30 atomic units molecular weight. The carbon component is therefore 12/30 or 40%. Thus, of the 1,720 kilos of carbohydrates, carbon is 688 kilos.
All this carbon is taken carbon dioxide in the urban air. Since the chemical formula of carbon dioxide is CO2, the molecular weight is 12 + (16 *2) or 44. Thus, the amount of carbon dioxide removed from the air is (688 kilos / 12) *44 or 2,523 kilograms, 2.5 Tons per year all from just a single building. This is value 2.523 kilograms per square meter and applying this to a 800,000 square meter roof top area of a 1 square kilometer urban area, this totals 2,018,133 kilograms or 2,018 tons of CO2 per year.
The new entry level Epson Stylus S21 promises to be cheap solution for your everyday printing tasks and going by the price tag it seems to be just that. The price of an inkjet printer shouldn’t be judged on it price tag alone, printer ink cartridges are where printer manufactures make their profits and this makes them expensive. Epson S21 ink cartridges are no more expensive than most other printer cartridges in fact they’re reasonable in comparison but still expensive when compared to the price of the S21 printer itself. One surprising feature of the Stylus S21 is its build quality, the plastic feel solid and should stand up to trails of everyday use with the exception of the paper feed try support which feels a weak. Print quality is also good; the S21 is capable of printing photos up to A4 size on a variety of paper media including gloss, satin and matte photo papers. Although the quality is there the S21 doesn’t make a very good printer for photos because it is far too slow, even the smallest of photos (6×4) takes over five minutes to print and if you are printing more than ten photos your looking at more than an hour! Document printing is not much better, amazingly Epson claim that the S21 can print 25 pages per minute but is a ridiculous claim and numerous test shave shown it capable of no more than 8 pages per minutes in its lowest quality setting. Overall the Stylus S21 is great as long as you’re not planning on doing any large printing jobs with it.
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