Yabani Raventte(Rheum ribes L.) Doku Kültürü ile Çoğaltım Üzerine Araştırma

Veri Madenciliğinde Özellik Seçim Tekniklerinin Bankacılık Verisine Uygulanması Üzerine Araştırma ve Karşılaştırmalı Uygulama

Özet. Günümüzde pek çok kurum mevcut verilerini ilişkisel veri tabanlarında saklamakta ve modellemelerini bu verileri kullanarak gerçekleştirmektedir. Kurumsal veri modellerinin karmaşıklığı, veriye ait özelliklerin çokluğu ve veri miktarının fazlalığı, veri üzerinde her türlü analizin (kümeleme, regresyon, vb.) yapılmasını zorlaştırmaktadır. Bu nedenle veri kümeleri üzerinde tahmin gücü yüksek...

/?-Carboline Alkaloids from Ribes nigrum L

From Ribes nigrum L. two ß-carboline alkaloids (deshydroxymethyl flazin (1) and flazin methyl ether (2)) could be isolated in minute amounts. The structure elucidation is described. The two compounds are present in the freshly pressed juice, but they are also formed during storage of the juice by condensation of tryptophane with ascorbic acid or its degradation products. This could be shown by ...

BLACK CURRANT (Ribes nigrum L.) – AN INSIGHT INTO THE CROP

Detection of the polyphenolic components in Ribes nigrum L.

BACKGROUND The blackcurrant (Ribes nigrum L.) is a species of native currant which contains a lot of polyphenolic antioxidants which is used medicinally and has a fundamental role in the maintenance health. MATERIALS, METHODS AND OBJECTIVE: Ultraviolet-visible spectrophotometry and ultraviolet range high performance liquid chromatography (HPLC) were used to characterize the polyphenolic content...

Combinatorial Explorations in Su-Doku

Su-Doku, a popular combinatorial puzzle, provides an excellent test-bench for heuristic explorations. Several interesting questions arise from its deceptively simple set of rules. How many distinct Su-Doku grids are there? How to find a solution to a Su-Doku puzzle? Is there a unique solution to a given Su-Doku puzzle? What is a good estimation of a puzzle's difficulty? What is the minimum puzz...