UNLABELLED PREMISE OF THE STUDY Utah agave (Agave utahensis) and its putative subspecies, A. utahensis subsp. kaibabensis and A. utahensis subsp. utahensis, are keystone species of the Mojave Desert and Colorado Plateau in the southwestern United States. Here we developed microsatellite markers to study population structure and genetic diversity of the two subspecies of A. utahensis. • MET...

Three known flavones and seven known homoisoflavonoids were isolated from the methanolic extract of the leaves of Agave sisalanaPerrine ex Engelm. Their structures were elucidated on the basis of spectroscopic analysis. The isolated compounds were also evaluated for immunopharmacological activity. PBMC were used as target cells, and cell proliferation was determined by (3)H-thymidine uptake. (+...

This report is an investigation into Hilbert’s Problems, a set of twentythree questions posed by David Hilbert in 1900. In particular, the report focuses on the first and third problems those of the Continuum Hypothesis, following Cohen’s original proof of its independence; and the Equidecomposability of Polyhedra, following Hadwiger’s proof. It also looks at sets of problems for the twenty-fir...

Traditions of Russian fundamental and applied life sciences go back to the last third of the nineteenth century, the reign of “Tzar-Liberator” Alexander II. Basic scientific schools in organic chemistry and life sciences appeared in St. Petersburg, Moscow, Kazan, Kiev, and Warshaw. Since then, Russian bioscience and biotechnology has experienced rises and falls together with the whole country.

Maps are powerful tools used to analyze and compare a wide range of geographically referenced data. The last third of the twentieth century has witnessed the increasing use of maps to portray statistical information. Maps of mortality and morbidity are useful for assessing relationships with potential risk factors. They can also be used to track progress in public health programs and policy dev...

The year 2000 marks the onset of the 21st century. In this transitional year, prominent physical anthropologists will provide brief reflections on our discipline, including what attracted them to it, and their views on the directions our discipline may pursue as we enter, in January 2001, the third millennium.

The third and last section of the volume aims to represent Brazilian colony in 18th century through an historical, iconographical literary point view, analyzing three very important volumes same period.

Eclipses in the 14.4 day period double-lined binary SS Lac were observed photographically and visually early in the 20 century, but stopped some 50 or 60 years ago. This has been explained by the presence of a distant third star in the system, which has now been detected spectroscopically with a period of 679 days. The plane of the orbit of the binary is changing relative to the line of sight i...