Crop residue return sustains global soil ecological stoichiometry balance.

Although soil ecological stoichiometry is constrained in natural ecosystems, its responses to anthropogenic perturbations are largely unknown. Inputs of inorganic fertilizer and crop residue are key cropland anthropogenic managements, with potential to alter their soil ecological stoichiometry. We conducted a global synthesis of 682 data pairs to quantify the responses of soil carbon (C), nitrogen (N), and phosphorus (P) and grain yields to combined inputs of crop residue plus inorganic fertilizer compared with only inorganic fertilizer application.

[Correlation of cyclooxygenase 2 expression with microlymphatic density and its clinical significance].

Objective: To study the expression of cyclooxygenase-2 (COX-2) in esophageal carcinoma and its correlation with microlymphatic density (MLD), and to investigate the clinicopathological and prognostic significance of COX-2 and MLD in patients with esophageal cancer.

Methods: COX-2 expression and MLD were detected by immunohistochemistry in 100 cases of esophageal squamous cell carcinoma. Follow up was available in 76 patients.

Toward automatic behavioral screen: a computational model for analyzing Caenorhabditis elegans locomotion.

Genetic screen has been facilitating molecular geneticists to analyze mutants that produce certain phenotypes. However traditional methods for behavioral phenotype screen of mutant Caenorhabditis elegans rely on human observers and therefore are subjective and imprecise. This work dedicates a model to quantify and analyze the worm behavior using automatically-tracking and time-coded images.