Background: Two of the important radionuclides which are entered to environment and human diet are radium-226 (226Ra) and cesium-137 (137Cs). It is clear that the methods for preparation of foods such as peeling, washing, cooking or frying can affect the dose which is received by human due the to consumption of foodstuffs. An experiment has been performed at the environmental monitoring section...

Fenpyroximate is an effective acaricide on several food crops. In the present study, dissipation of residue of this acaricide in black tea, tea infusion and spent tea was studied. Analysis was carried out using high performance liquid chromatography with diode array detection. The rate of dissipation was found to vary with the nature of the substrate. In tea leaves the half-life of fenpyroximat...

This study has been initiated with an aim of enhancing the acoustical comfort levels in architectural studios Bilkent University Ankara. Initial assessment by field tests indicated very long reverberation times, supporting complaints students and instructors. In order to be applied studio environment, panels are developed out recycled materials. The increasing coffee demand consumption our era ...

The unprecedented early spring frost that appears as a cold stress adversely affects growth and productivity in tea (Camellia sinensis L.); therefore, it is indispensable to develop approaches to improve the cold tolerance of tea. Here, we investigated the effect of pretreatment with exogenous melatonin on the net photosynthetic rate, the maximum photochemical efficiency of PSII, chlorophyll co...

Leaf-cutting ants learn to avoid plants initially harvested if they prove to be harmful for their symbiotic fungus once incorporated into the nest. At this point, waste particles removed from the fungus garden are likely to contain cues originating from both the unsuitable plant and the damaged fungus. We investigated whether leaf-cutting ant foragers learn to avoid unsuitable plants solely thr...

BACKGROUND Tea is the most consumed beverage in the world which is second only to water. Tea contains a broad spectrum of active ingredients which are responsible for its health benefits. The composition of constituents extracted to the tea brew depends on the method of preparation for its consumption. The objective of this study was to investigate the extraction kinetics of phenolic compounds,...

1. Abstract 2. Introduction 3. N-methyltransferases involved in caffeine biosynthesis 3.1. N-methyltransferase activity in cell free preparations 3.2. Purification of caffeine synthase from tea leaves 3.3. Molecular cloning of caffeine synthase gene from tea leaves 3.4. The orthologous genes in coffee 3.5. The characteristic future of N-methyltransferase in theobromineaccumulating species 4. Ca...