site effect on some important flavonoid compounds of linden tree (tilia platifolia l.)

Do linden trees kill bees? Reviewing the causes of bee deaths on silver linden (Tilia tomentosa).

For decades, linden trees (basswoods or lime trees), and particularly silver linden (Tilia tomentosa), have been linked to mass bee deaths. This phenomenon is often attributed to the purported occurrence of the carbohydrate mannose, which is toxic to bees, in Tilia nectar. In this review, however, we conclude that from existing literature there is no experimental evidence for toxicity to bees i...

Effect of different salinity levels on physiological characteristics, phenylalanine ammonia lyase activity and some flavonoid compounds in hydroponic cultivation of saffron (Crocus sativus L.)

The use of salt tolerant plants in arid and semi-arid regions of the world, including Iran, is one of the ways to achieve high yields. The aim of this study was to investigate the effect of different salinity treatments in hydroponic culture on physiological characteristics, phenylalanine-ammonialyase (PAL) activity and also the small amount of flavonoid compounds kaepmferol and quercetin in fi...

effect of oral presentation on development of l2 learners grammar

this experimental study has been conducted to test the effect of oral presentation on the development of l2 learners grammar. but this oral presentation is not merely a deductive instruction of grammatical points, in this presentation two hypotheses of krashen (input and low filter hypotheses), stevicks viewpoints on grammar explanation and correction and widdowsons opinion on limited use of l1...

مطالعه اثر رویشگاه بر میزان برخی از ترکیبات فلاونوئیدی (Tilia platifolia L.) درخت نمدار

Flavonoids from the leaves of Iranian Linden; Tilia rubra subsp. caucasica

Background and objectives: Plants belonging to the genus Tilia L. (Tiliaceae) are often tall beautiful trees which are considered for various medicinal potentials of their flowers and leaves. The present study was an attempt to investigate the phytochemical constituents of Tilia rubra subsp. caucasica leaves from the hyrcanian forests of north of Iran. Methods: Chromatography on Silica gel (nor...

the effect of explicit teaching of metacognitive vocabulary learning strategies on recall and retention of idioms

چکیده ندارد.