In order to increase the egg production of hens, some chicken raisers can increase the amount of vitamins to be fed. As a result, the chickens are hypervitaminic, which affects the growth and laying of laying hens. The addition of vitamins to the laying hens must be strictly adhered to the standard, and the increased dosage will cause harm to the laying hens.
The appropriate content of vitamin A per kg of feed for laying hens is 4000 international units. When the feeding amount exceeds the feeding standard, the hens may cause hypervitaminosis, which is manifested as depression or convulsions, decreased feed intake, no food when serious, and feathers fall off.
The appropriate content of vitamin D per kg of feed for laying hens is 500 international units. When the feeding amount exceeds the feeding standard, a large amount of calcium can be transferred from the bone tissue of the laying hen, and the absorption of calcium in the gastrointestinal tract is promoted, and the blood calcium concentration is increased, and the calcium is deposited on the arterial wall, the joint, the renal tubule, and the heart. And other soft tissues, clinical manifestations of loss of appetite, diarrhea, kidney stones, laying hens often die of uremia.
The appropriate content of vitamin E per kg of feed for laying hens is 5 international units. When fed too much, it can cause fat metabolism disorder in laying hens, leading to death from excessive fat or poisoning.
The appropriate amount of vitamin K per kilogram of feed for laying hens is 0.5 mg. When the feed is excessive, because it stimulates inflammation of the gastrointestinal mucosa, the chicken exhibits a sharp loss of appetite and squatting, resulting in a decrease in egg production and a serious discontinuation.
Rod Cylinder Lens
Rod cylinder Lens is polished on the circumference and ground on both ends. Optical performance is similar to a Cylindrical Lens . Collimated light passing through the diameter of the rod cylinder lens will be focused into a line. N-BK7 and UV Fused Silica substrates are available for a variety of UV, Visible and NIR applications. Also we supply kinds of Plano-Convex Cylindrical Lens,Plano-Concave Cylinder Lens,Double-Convex Cylinder Lens,Double-concave Cylinder Lens, Meniscus Cylinder Lens ,Rod cylinder lens,special cylindrical lens etc. these cylindrical lens and components are available in a range of micro sizes for integration into a host of OEM applications.
Custom sizes, variations in polishing/ ground surfaces and additional coatings on cylindrical lens are available upon request, please contact our Sales Department for details.
Rod cylinder lens
Specification of our rod cylinder lens and other cylindrical lens as follow:
*Material: BK7,Ge,UV-grade fuse silica(JGS1,JGS2,JGS3)or other optical materials
*Dimension Tolerance: +0.0 -- -0.1mm
*Center Thickness: +/-0.1mm
*Focal Length Tolerance: +/-1%
*Surface Quality:20/10
*Surface Figure: lambda/2 at 633nm on plano side
*Clear Aperture>90%
*Chamfer: 0.25mm at 45 degree typical
*Coating Optional
Rod Cylinder Lens,Long Cylinder Lens,Long Cylindric Lens,Optical Glass Rod Cylindrical Lens
China Star Optics Technology Co.,Ltd. , https://www.opticsrealpoo.com