Singers in Russian Military Choir Among 92 Feared Dead After Plane Crashes Into Black Sea. Russian Military Plane Crashes into Sea. Shortly after takeoff on Sunday morning, a Russian military plane carrying 92 people crashed into the Black Sea near Sochi.
Keywords: chloride in concrete, near-infrared spectrometry, rapid determination. 1. INTRODUCTION. 1.1 Background. Penetration of chloride ions into concrete is a well-known problem, because it eventually results in. corrosion of rebars, leading to cracks, spalling, delamination and other roadway defects [1]. The problem is. particularly acute in bridge decks, which are subject to frequent salt applications during the winter months.
Passive diffusion across tight junctions is the primary mechanism of potassium transport in the colon. The passive uptake of water (which largely follows sodium absorption) serves to convert the liquid ileal contents to semisolid feces. Most water and sodium are absorbed in the ascending and transverse colon.ite: Calcium is absorbed from the duodenum and upper jejunum primarily by an active vitamin D-dependent transcellular process; in the ileum, the predominant process is passive vitamin D-independent, paracellular diffusion. Absorption of Ca ++ in the ileum is about one-third as rapid in the upper small intestine.