AN ideal sample introduction system for gas chromatography suitable for use with a variety of columns and detection devices should possess the following characteristics: (1) the entire sample should ...

Clovis Paleoindian Tradition and Western Stemmed Tradition are types of lithic technologies which are classified by stone tools found in the Western United States (Andrefsky, 1994). A collection of ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...