A sequence of amorphous iron r>xide-rich sediments, interbedded with iron-free calcareous nannoplankton oozes, occurs in the basal zones of Sites 74 and 75 of the Deep Sea Drilling Project, immediately overlying basalt. These sediments have affinities with iron and manganeserich sediments previously described from the crest of the East Pacific Rise. It is considered most likely that this sedime...

Perfusing a rat liver with digitonin in the concentration range 2-20mg/ml results in complete decolorization of the organ within 45-250s. Decolorization progresses with time in the direction of flow, and it is therefore possible, by collecting the eluate, to obtain material from specific intracellular compartments of hepatocytes in different zones in the microcirculatory unit of the liver. The ...

INTRODUCTION The antibacterial effects of calcium hydroxide (CH), mineral trioxide aggregate (MTA), and calcium enriched mixture (CEM) cement against various spp. of microorganisms were assessed in-vitro using agar diffusion test. MATERIALS AND METHODS A base layer of Petri plates was made using Muller-Hinton agar. Four cavities were made in agar and filled with freshly mixed materials after ...

During development and regeneration, new cells are added and incorporated to the liver parenchyma. Regulation of this process contributes to the final size and shape of the particular organs, including the liver. We identified the distribution of liver growth zones using an embryonic chicken model because of its accessibility to experimentation. Hepatocyte precursors were first generated all ov...

In shallow lakes, different primary producers might impact the physiochemical characteristics of the sediment and the associated microbial communities. Until now, little was known about the features of sediment Archaea and their variation across different primary producer-dominated ecosystems. Lake Taihu provides a suitable study area with cyanobacteria- and macrophyte-dominated zones co-occurr...

Duplication of eukaryotic genomes during S phase is coordinated in space and time. In order to identify zones of initiation and cell-type- as well as gender-specific plasticity of DNA replication, we profiled replication timing, histone acetylation, and transcription throughout the Drosophila genome. We observed two waves of replication initiation with many distinct zones firing in early-S phas...

Introduction: Upon cooling in their host rocks, orthopyroxenes undergo cation ordering and exsolution processes. The state of order achieved during cooling [1] and the type and morphology of the exsolution products depend on the rate of cooling. Often, the formation of stable exsolution phases is preceded by the formation of metastable phases, e.g. Guinier-Preston (GP) zones. GP zones consist o...

Abstract Understanding the processes of subducted sediment recycling in subduction zones is vital to decipher Earth’s crust-mantle interactions. This study uses along-arc geochemical variations and zircon U-Pb-Hf-O isotopes Quaternary arc basalts andesites on Sumatra Island, Indonesia assess mode zones. The Hf-O inherited zircons near Toba Caldera indicate that some them were derived from terri...

Abstract We recorded the concentrations, distributions and sources of 16 polycyclic aromatic hydrocarbons (PAHs), along with zinc (Zn), lead (Pb) cadmium (Cd), in soils from different areas Krakow––the city-centre, industrial residential zones––and outside city. Their relationships to soil properties were examined, associations established between pollution myocardial infarction (MI) incidences...