Freeze–thaw cycles under the conditions of snowmelt and rainfall infiltration in winter are triggers for petroglyph weathering. Rock samples from Helan Mountains were subjected freeze–thaw various laboratory testing, mass, elastic wave velocity unconfined compressive strength tested. The results show that mass loss rate, decreased. In addition, according to XRD analyses, content calcite feldspa...

background: besides of transmitting several diseases to animals, and tick paralysis, ornithodoros lahorensis induce skin lesions. this experiment was done to determine histopathological features of adult o. lahorensis bite on rat. methods: in this investigation adult male rats were infested with o. lahorensis ticks. animals were divided into two groups and euthanized two days and two weeks afte...

Abstract Carbon/carbon (C/C) composites have received considerable attention for one of the most promising materials in thermal-structural applications owing to their low density, excellent mechanical strength at high temperature, and superior thermal shock resistance. However, C/C are susceptible destructive oxidation atmospheric environment temperature. Matrix modification by adding ultra-hig...

Infiltration is the process by which water enters the earth’s surface. Although contribution of soil water to total water present on earth surface is negligible, but it is of prime importance for plant life. Very recently, dimensionless form of Kostiakov equation was proposed for precise estimation of Kostiakov model parameters. The present paper is an assessment of accuracy of proposed dimensi...

Ultrastructural artifacts regarding collapse and aggregation of cultured cells have been problematic, especially when investigated apoptotic cells. The infiltration process during sample preparation is considered to be the most crucial factor for this problem. This study was conducted using two culture systems: a suspension culture system of human T-lymphocyte Jurkat cells and rabbit mature den...

This paper summarizes the progression of modeling efforts of infiltration, percolation, and seepage conducted between 1984 and 2008 to evaluate feasibility, viability, and assess compliance of a repository in the unsaturated zone for spent nuclear fuel and high-level radioactive waste at Yucca Mountain, Nevada. Scientific understanding of infiltration in a desert environment, unsaturated percol...