Abstract Coarse‐textured soils are typically not highly aggregated due to low surface reactivity of sand‐sized grains. However, soil erosion and sealing can still be a concern from frequently tilled in relatively flat landscapes the Coastal Plain Flatwoods southeastern United States. Soil at 0‐to‐10‐cm depth was sampled 120 randomly chosen cotton ( Gossypium hirsutum L.) fields North Carolina, ...

Land management affects soil structure and many other properties processes. Our objectives were to evaluate organic C (SOC), aggregate size distribution, aggregate-associated C, as affected by long-term land slope. A chronosequence of 38 on-farm sites with low high (5–18%) slopes was selected 5–40 yr management. The classified business usual (BAU) cropland (BAU-Crop), BAU pasture (BAU-Past), ne...

Emulsion polymerization process provides a unique polymerization locus that has a confined tiny space with a higher polymer concentration, compared with the corresponding bulk polymerization, especially for the ab initio emulsion polymerization. Assuming the ideal polymerization kinetics and a constant polymer/monomer ratio, the effect of such a unique reaction environment is explored for both ...

Laser light scattering (LLS) including the angular dependence of the absolute integrated scattered intensity (StaticLLS) and of the line-widthdistribution (dynamic LLS) has been used to characterize the molecular weight distributions of dextran samples with different branching densities. In the procees of converting a translational diffusion coefficient distribution (G(D)) obtained from the pre...

Widespread shrub encroachment in grasslands can lead to changes soil aggregates and organic carbon (SOC), especially deep soils. Soil physicochemically protect SOC thus affect sequestration. Characterizing the their associated with is critical for evaluating ecological consequences of different grasslands. In this study, we investigated various sizes at maximum depths 5 m patches neighboring gr...

BACKGROUND The skin prick test (SPT) is a valid and approved tool that is used to diagnose atopic diseases. The SPT is accurate, safe, simple and inexpensive. However, the histamine concentration used as a positive control in the SPT varies among centers. OBJECTIVE To compare SPT results using different concentrations of locally-prepared and imported histamine solutions. METHOD This prospec...

The objective of this investigation was assessment of physical and chemical parameters ofsoil and sediment in loess lands under different land uses, in the north of Iran. A yearly soilsampling was carried out randomly in three land uses (cultivated, forest and pasture) inQarnave and Yelcheshme watersheds. Sediment samples were taken monthly in thewatersheds at the hydrometrical station of Tamer...