The present monograph studies the asymptotic behaviour of eigenvalues, products and functions of block Toeplitz matrices generated by the Fourier coefficients of a continuous matrix-valued function. This study is based on the concept of asymptotically equivalent sequences of non-square matrices. The asymptotic results on block Toeplitz matrices obtained are applied to vector asymptotically wide...

BACKGROUND For decades, hormone replacement therapy (HRT), which includes both estrogen and progestin, has been administered to postmenopausal women to mainly treat the symptoms of menopause and help prevent osteoporosis, with the added benefit of preventing coronary heart disease (CHD). Recently released study results have left clinicians wondering if HRT should be used at all, and, if so, wit...

Introduction Gamma-linolenic acid (GLA) is an important conditionally essential fatty acid (EFA). GLA is an omega-6 polyunsaturated fatty acid (PUFA). The fatty acid molecule is comprised of 18 carbon atoms with three double bonds. It is also known as 18:3n-6; 6,9,12-octadecatrienoic acid; cis-6, cis-9, cis-12octadecatrienoic acid; and gamolenic acid. GLA is found naturally in the fatty acid fr...

Description and Constituents Piper methysticum (kava kava) is a perennial plant native to the Pacific Island region, and has been used ceremonially for thousands of years. Traditionally, a beverage is prepared, then drunk before the evening meal. Indigenous methods of mastication of the kava root have given way to grinding or pounding the plant substance, which is then mixed with water or cocon...

The use of tobacco dates back to the ancient civilizations of the Americas, where it played a central role in religious occasions. The peoples smoked tobacco in cigars and pipes and chewed it with lime, for its pleasurable euphoriant effects. In the 16 th century, Europeans spread the use of tobacco in North America, while the Spanish bring it into Europe. In the 1559, Jean Nicot, the French am...

Section Prostrata of the genus Verticillium was introduced by GAMS (1971) to separate verticillium-like anamorphs of the Clavicipitaceae from other species of the genus that were known or supposed to have affinities with other families of the Hypocreales. Other sections of Verticillium were subsequently described by GAMS & VAN ZAAYEN (1982). MESSNER et al. (1996) showed that the most important ...

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