ORTAOKUL ÖĞRENCİLERİNİN FEN BİLİMLERİ ÖĞRENİMİNDE ZAMAN TERCİHLERİ

Tamoxi fen ,

Purpose: This trial was prompted by uncertainty about the need for breast irradiation after lumpectomy in node-negative women with invasive breast cancers of < 1 cm, by speculation that tamoxifen (TAM) might be as or more effective than radiation therapy (XRT) in reducing the rate of ipsilateral breast tumor recurrence (IBTR) in such women, and by the thesis that both modalities might be more e...

Zaman Tetikli Almaç Planlayıcı Yazılım Bileşeni Tasarımı

BAÜ Fen Bil

The essential nature of selenium as well as its toxicity depend on the concentration and the chemical forms in which this element is present in environmental and biological samples. Dissolved inorganic selenium can be found in natural waters and soils as selenides, selenite and selenate. Organoselenium compounds that may be present in air, soils and plants are volatile methylselenides, trimethy...

Efficient Prediction of Marsaglia-Zaman Random Number Generators

We show that the random number generator of Marsaglia and Zaman produces the successive digits of a rational -adic number. (The -adic number system generalizes -adic numbers to an arbitrary integer base .) Using continued fractions, we derive an efficient prediction algorithm for this generator.

FEN Nucleases: Bind, Bend, Fray, Cut

In this issue, Orans et al. (2011) and Tsutakawa et al. (2011) report exciting insights into the molecular principles governing diverse endo- and exonucleolytic cleavage specificities of members of the RAD2/FEN superfamily of nucleases, which have critical roles in DNA replication and maintenance.