Soil compaction is one of the most harmful elements affecting soil structure, limiting plant growth and agricultural productivity. It crucial to assess degree penetration resistance discover solutions consequences compaction. In order obtain appropriate value, using cone requires time labor-intensive measurements. Currently, satellite technologies, electronic measurement control systems, comput...

in-situ testing techniques have proven to be successful in improving the speed and reliability of geotechnical investigations. one of the most common in-situ methods in engineering geology and site investigation is cone penetration test (cpt), which is mainly used for characterization of soils, as it is a robust, simple, fast, reliable and economic test that can provide continuous soundings of ...

lack of sufficient information on conservation tillage systems leads to the dominating use of conventional tillage practice in most parts of iran. testing other management practices may help in decision making regarding the types of tillage systems that reduce soil deterioration. a three- years field experiment was conducted to study the effects of conventional (ct), reduced (rt) and no-till (n...

introduction: this study was carried out to compare the capability of k-files with mtwo rotary file in terms of negotiation as well as depth of penetration in second mesiobuccal (mb2) canal of maxillary first molar. materials and methods: a total of 32 mb2 canal of maxillary first molars having different root curvatures (not more than 30 degree) and root lengths were selected and then detected ...

ABSTRACT Soils are highly variable across landscapes, which can be assessed and characterized according to scale, as well fractal multifractal concepts of scale. Thus, the objective this study was analyze multifractality penetration resistance (PR) vertical profiles from different slope forms (concave convex). The experimental plot incorporated 44.75 ha, PR measured at 70 sampling points in 0-0...

When bacteria assume the biofilm mode of growth, they can tolerate levels of antimicrobial agents 10 to 1,000 times higher than the MICs of genetically equivalent planktonic bacteria. The properties of biofilms that give rise to antibiotic resistance are only partially understood. Inhibition of antibiotic penetration into the biofilm may play a role, but this has not been proven directly. In th...

A common response by plants to fungal attack is deposition of callose, a (1,3)-β-glucan polymer, in the form of cell wall thickenings called papillae, at site of wall penetration. While it has been generally believed that the papillae provide a structural barrier to slow fungal penetration, this idea has been challenged in recent studies of Arabidopsis (Arabidopsis thaliana), where fungal resis...