The presence of example sentences

The presence of a functional group such as alcohol dictates the properties of the carbon compound, regardless of the length of the carbon chain.He tried raising caterpillars in the presence of beetles.Polythene is obtained by the combination of large number of ethene molecules at high temperature, high pressure and in the presence of a catalyst.On the other hand, high levels of anxiety that are distressing and interfere with effective functioning indicate the presence of an anxiety disorder — the most common category of psychological disorders.Since a water molecule is eliminated from the alcohol molecule in the presence of an acid, this reaction is known as acidic dehydration of alcohols.The presence of reactants in an open beaker is an example of an open system*.What is the nature of this influence? What impact does the presence of others have on our performance? We will discuss two situations : an individual performing an activity alone in the presence of others (social facilitation), and an individual performing an activity along with the others as part of a larger group (social loafing).We are aware that normally rain water has a pH of 6 due to the presence of H+ ions formed by the reaction of rain water with carbon dioxide present in the atmosphere.The presence of Susu is an indication of the health of the river.In the presence of oxides of vanadium, molybdenum or chromium supported over alumina get dehydrogenated and cyclised to benzene and its homologues.), ways of dealing and relating with others, pattern of behaviours in the presence of others, etc.Halogenation takes place either at higher temperature (573-773 K) or in the presence of diffused sunlight or ultraviolet light.During photosynthesis, chlorophyll containing cells of leaves (Figureure 2), in the presence of sunlight, use carbon dioxide and water to synthesise carbohydrates (Figureure 3).The presence of starch in leaves indicates the occurrence of photosynthesis.It is because of the presence of d orbital in them.