Effects of mindfulness intervention on competition state anxiety in sprinters-a randomized controlled trial.

Objectives: With the rapid growth of China's sprint program's international competitiveness, the psychological problems of sprinters have become a common concern in sports training theory and practice. Hence, the study examined the impact of a 7-week Mindfulness training program on competition state anxiety in Chinese sprinters.

Methods: Twenty-four sprinters (M = 22.

[Lead adsorption by the root cell wall of tea plant].

A research was done to study the Pb adsorption by the root cell wall of tea plant extracted from Longjing 43. It was indicated that the amount of Pb adsorbed by the root cell wall increased with augment of the initial pH of the solution under acidic condition, dramatically as the pH ranged from 2.0 to 4.

[Research advances in uptake, translocation, accumulation and detoxification of Pb in plants].

Contamination of soils by lead (Pb) is of widespread occurrence because of the industrialization, urbanization, mining, and many other anthropogenic activities. It is urgent and necessary for scientists to uncover the mechanisms of uptake, translocation, accumulation and detoxification of Pb in plants for the following two reasons. First, it helps target and regulate the key process of Pb uptake by crops and vegetables and minimize the threat of Pb introduction to the food chain.

[Characteristics of distribution and chemical forms of Pb in tea plant varieties].

A hydroponics experiment combined with subcellular fractionation and sequential extraction was conducted to study the Pb concentration in different organs of two tea plant varieties (Longjing 43 and Yingshuang) and the Pb subcellular distribution and chemical forms in the roots of the varieties. Under Pb stress, the root system of the two varieties had different features in morphology. With the increasing concentration of Pb in culture solution, the Pb concentration in Longjing 43 young leaves increased, but that in Yingshuang' s had no significant variation.

[Biosorption of heavy metals from solution by tea waste: a review].

Tea waste is an important part of agricultural solid wastes, because of its various sources and huge amount. The heavy metals removal from waste water by tea waste has been paid much attention by the researchers around the world, owing to the adsorption characteristic of tea waste. In this paper, the research advances in the heavy metals removal from aqueous phase by tea waste were summarized from the aspects of affecting factors, adsorption mechanism, pretreatment, desorption, and regeneration, and the prospects were put forward.