Photochemistry of Vitamins A, B, C, D

( a ) Φ ( a , B ) Φ Φ ( B , C ) ( C , D )

جواب های معادله دیوفانتی a^4+b^4=c^4+d^4

اویلر برای این معادله دو جواب پارامتری ارایه نمود ولی جواب های کلی این معادله هنوز مشخص نیست. روشهایی که در این تحقیق از آن استفاده می شود عبارتند از سه تایی های فیثاغورسی ، شبه جواب ، شبه جواب فاکمبرگ، کاهش جبری، وتبدیلات پارامتری که هر روش دسته خاصی از جوابها را در بر می گیرد.سپس مثال های عددی بر اساس روش های فوق ارایه می گردد.این پایان نامه شامل لیست نا تمام از 218 جواب غیر بدیهی اولیه در اع...

A B C D PBSM SPACE PARTITION SHJ SPACE PARTITION ( a ) ( b ) A B C

We introduce a new algorithm to compute the spatial join of two or more spatial data sets, when indexes are not available on them. Size Separation Spatial Join (S 3 J) imposes a hierarchical decomposition of the data space and, in contrast with previous approaches, requires no replication of entities from the input data sets. Thus its execution time depends only on the sizes of the joined data ...

Water-Soluble Vitamins: B-Complex and Vitamin C

What are Vitamins? Vitamins are essential nutrients found in foods. They perform specific and vital functions in a variety of body systems, and are crucial for maintaining optimal health. The two different types of vitamins are fat-soluble vitamins and water-soluble vitamins. Fat-soluble vitamins — vitamins A, D, E and K — dissolve in fat before they are absorbed in the bloodstream to carry out...

Water Soluble Vitamins - Vitamin C & Vitamin B Complex in Dogs

According to Stedman's Medical Dictionary, a vitamin is 'one of a group of organic substances, present in minute amounts in natural foodstuffs, that are essential to normal metabolism.' As defined, vitamins are present in very small quantities in most foods and it is this fact that leads to the manufacture of vitamin supplements for dogs, cats, and people. Not only are vitamins naturally presen...