Abstract Mafic volcanic activity is dominated by effusive to mildly explosive eruptions. Plinian and ignimbrite-forming mafic eruptions, while rare, are also possible; however, the conditions that promote such explosivity still being explored. Eruption style determined ability of gas escape as magma ascends, which tends be easier in low-viscosity, magmas. If permeability sufficiently high reduc...

The pegmatites of the Seridó Pegmatite Province show a granitic bulk mineralogical composition, composed K-feldspar, albite, quartz, muscovite and occasionally biotite. Detailed studies major minerals are scarce. There is, on other hand, relatively larger number published contributions concerning pegmatite accessory minerals. This field trip guide focus mainly occurrence locations these last mi...

Highly explosive Plinian eruptions of basaltic magma are enigmatic because low melt viscosities should inhibit such eruptive style. Masaya volcano, Nicaragua, is a persistently active system capable wide range styles, from open-conduit lava lake activity to voluminous eruptions; it thus an ideal natural laboratory constrain potential controls on eruption Here we report the major, trace, and vol...

Himalayan leucogranites are abundant within a ~2000-km-long, E-W trending belt on the Tibetan Plateau. Recently, it has been shown that several and pegmatites (including aplites) of Himalayan leucogranitic closely related to rare-metal mineralization. The commonly peraluminous strongly peraluminous, classifying as highly-fractionated granites in terms whole-rock geochemistry chara...

Echistatin is a 49-amino-acid peptide belonging to the family of disintegrins that are derived from snake venoms and are potent inhibitors of platelet aggregation and cell adhesion. Integrin avb3 receptor plays a critical role in several physiological processes such as tumor-induced angiogenesis, tumor cell metastasis, osteoporosis and wound repair. In this study, we have characterized the bind...

Soil cation exchange capacity (CEC) depends on the extent and negative charge density of surfaces of soil mineral and organic components. Soil water sorption also depends on the extent of such surfaces, giving thus way to significant relationships between CEC and hygroscopic moisture (HM) in many soils. In this work, we explored whether CEC could be accurately predicted from HM in agricultural ...

introduction the study area is a small part of the urumieh-dokhtar structural zone in the markazi province, located in the northeastern part of the farmahin, north of arak (hajian, 1970). the volcanic rocks studied from the area include andesite, dacite, rhyodacite, ignimbrite and tuff of middle to late eocene age (middle lutetian to upper lutetian) (ameri et al., 2009). it seems that folding a...

Four major glutamate receptor 2 (GluR2) transcripts differing in size ( 4 and 6 kilobases) due to alternative 3 untranslated regions (UTRs), and also containing alternative 5 UTRs, exist in the brain. Both the long 5 UTR and long 3 UTR repress translation of GluR2 mRNA; repression by the 3 UTR is relieved after seizures. To understand the mechanism of translational repression, we used rabbit re...