Ambient air. Biomonitoring with Higher Plants. Method of the standardized tobacco exposure1 Scope This European Standard applies to the determination of the impact of ground level ozone on a bioindicator plant species (tobacco Nicotiana tabacum cultivars Bel W3, Bel B and Bel C) in a given environment. The present document specifies the procedure for setting up and use of a system designed to expose these plants to ambient air. It also describes the procedure for leaf injury assessment. Leaf injury caused by ozone appears in the form of

BS EN 61643-311 on Components for low-voltage surge protective devices is useful for:

automatic dropping device (A

BS EN 62137-1-2 describes a test method that applies to leadless surface mounting components and surface mounting connectors to which pull test is not applicable

— defining levels of hierarchical keywords

This sectional specification should be read in conjunction with EN 50288‑1

and establishes guidelines for meeting the requirements

sludges or other environmental samples by determining the production of biogas (carbon dioxide and methane) from the anaerobic digestion of sewage sludge over periods of up to 3 days

— corner-rounding cutters

This document provides specifications (3

BS 6072 is a British standard that discusses the methods for magnetic particle flaw detection

types of kill tanks

Variable-gauge systems