【生物炭对土壤atrazine矿化的影响】Nicolai David Jablonowski Nils Borchard Petra Zajkoska Jesús D. Fernández-Bayo Rosane Martinazzo Anne E. Berns and Peter Burauel. Biochar-Mediated [¹⁴C]Atrazine Mineralization in Atrazine-Adapted Soils from Belgium and Brazil. J. Agric. Food Chem. 2013 61(3): 512–516

Biochar addition to soil has been reported to reduce the microbial degradation of pesticides due to sorption of the active compound. This study investigated whether the addition of hardwood biochar alters the mineralization of ¹⁴C-labeled atrazine in two atrazine-adapted soils from Belgium and Brazil at different moisture regimens. Biochar addition resulted in an equally high or even in a significantly higher atrazine mineralization compared to the soils without biochar. Statistical analysis revealed that the extent of atrazine mineralization was more influenced by the specific soil than by the addition of biochar. It was concluded that biochar amendment up to 5% by weight does not negatively affect the mineralization of atrazine by an atrazine-adapted soil microflora.

【细胞三维培养】Martin A. Schwartz Christopher S. Chen.Deconstructing Dimensionality. Science 2013 339(6118): 402-404

Cells were first cultured in glass dishes over a century ago (1 2) a technology still used with only minimal changes. Yet cells on glass or tissue culture plastic so-called two-dimensional (2D) culture often fail to reflect in vivo function. The ability to grow cells within extracellular matrix (ECM) gels (3D culture) was a major advance that recapitulated in vivo cellular behaviors ranging from differentiated function to maintenance of stem cell niches (3–5). The question of