An antioxidant program is essential to help DNA-damaging free-radical production, which is an unavoidable part of energy metabolism. Antioxidant supplements containing vitamins A, C, E, selenium, zinc, and natural compounds from vegetable-derived foods are essential. The rate and quantity of DNA damage are directly related to elevated free-radical levels at both the nuclear an the cell-membrane levels. Experimental studies have shown that selegiline hydrochoride ( brand name Deprenyl), an anti-tremor drug most commonly used to treat Parkinson's disease, improves levels of the intrinsic antioxidant compounds that we normally produce on our own. The suggested dosage for antioxidant support is 2.5 to 5.0 mg/day, which is one-quarter to one-half the standard dose. Other antioxidant compounds such as superoxide dismutase(SOD), catalase, and glutathione peroxidase are produced within the cells and the mitochondria, which is where most free-radical production and free-radical damage takes place.
Nowadays, even in low light conditions, digital camera can quality pictures with higher ISO, noise and hot pixels have been gradually reduced. Sony has introduced back illumination process for consumer market. Sony BSI sensors evolved from Exmor to now Exmor RS( stacked) technology. This stacked technology allows further chip size reduction, which has strong demands in smartphone camera market. Digital astrophotography is also benefited from such advances, utilising Back Side Illumination technology Exmor: Within the CMOS sensor, it outputs low-noise digital signals by "on-chip column AD conversion" and "dual noise reduction" to suppress noise in the first half of the process In low light conditions, when a wide aperture is desirable to collect as much light as possible. At apertures wider than f/2.0, back-illuminated Exmor R sensors are significantly more efficient at collecting light than conventional, front-illuminated sensor...
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