We have studied the effect of small amounts of added liquid on the dynamic behavior of a granular system consisting of a mixture of glass beads of two different sizes. Segregation of the large beads to the top of the sample is found to depend in a nontrivial way on the liquid content. A transition to viscoplastic behavior occurs at a critical liquid content, which depends upon the bead size. We...

Matrix-assisted laser desorption/ionization (MALDI) time-of-flight (TOF) mass spectrometry was used to analyze short DNA duplex probes with one strand immobilized on solid supports (straptavidin-coated magnetic beads or controlled pore glass beads). Only the non-immobilized strand could be detected. Partial denaturation was found when the duplex probes were mixed with 3-hydroxypicolinic acid, a...

The mobility of the Blemmyes between Nile Valley and Red Sea coast, their skill in trading, are well attested literary sources archaeological record. While they operated mainly Eastern Desert, cemeteries, dated to mid-fourth century ce, were located strategic region Dodekaschoinos Lower Nubia. personal adornments composed beads, but glass imports have not yet been scientifically studied. This p...

In this study, we present the methods of the particle separation by employing electrokinetic phenomena (dielectrophoresis (DEP) and traveling-wave electroosmosis (TWEO)) and the inclined gravity. The methods can separate particles of same sign DEP. However, it is very difficult to separate particles on a plane electrode. To cope with this problem, we create the “Bottle neck Fork-trace electrode...

background: cystic hydatid disease is an important zoonosis, affecting humans and animals and is a significant public health and economic problem throughout the world and iran. since extraction of dna from the parasite is a primary and crucial step which has a principal effect on pcr results, in the current study five simple methods for dna extraction from protoscoleces of echinococcus granulos...

BACKGROUND Mutagenesis of yeast artificial chromosomes (YACs) often requires analysis of large numbers of yeast clones to obtain correctly targeted mutants. Conventional ways to isolate yeast genomic DNA utilize either glass beads or enzymatic digestion to disrupt yeast cell wall. Using small glass beads is messy, whereas enzymatic digestion of the cells is expensive when many samples need to b...