Eurycoma longifolia fruits are borne in large bunches consisting of 200-300fruits in each bunch. Even though trees produce abundant fruits during the peak fruiting season in September, yet the number of seedlings found growing in the forest floor is very low. Our results indicated that the seeds with hard endocarp sown in a 1:1 soil and sand mixture only start to germinate 43 days after sowing ...

Kimberlite eruptions bring exotic rock fragments and minerals, including diamonds, from deep within the mantle up to the surface. Such fragments are rapidly absorbed into the kimberlite magma so their appearance at the surface implies rapid transport from depth. High spatial resolution Ar-Ar age data on phlogopite grains in xenoliths from Malaita in the Solomon Islands, southwest Pacific, and E...

Shoshonitic volcanic centres are scarce within the back-arc mafic volcanism of Puna Plateau in Central Volcanic Zone Andes. San Jerónimo and Negro de Chorrillos volcanoes two well preserved shoshonitic monogenetic edifices that developed mainly Strombolian activity lava flows, which extended more than 9 4 km from vent, producing a volume DRE (Dense Rock Equivalent) 0.091 0.020 km3, respectively...

ABSTRACT Perched marshes in Lunenburg County differ exposure to prevailing waves (from most least exposed: Crescent Beach, Blue Rocks, Feltzen South). We sampled the middle marsh, recording replicates’ dried masses. In picking stage 1 (PS1), first 400 foraminifera, whether agglutinated or calcareous-walled, were picked and identified. From these data we calculated Shannon Function H compared be...

This paper investigates the physical, chemical, and microstructural properties of two types natural sand; alluvial sands dune sand from El-Oued region in northeastern Algerian Sahara. Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Fluorescence (XRF), Scanning electron microscopy (SEM/EDS), granulometry analysis have been performed. The FTIR XRD prove that consist high ...

Glucose-dependent growth of the luxCDABE reporter bacterium Pseudomonas fluorescens HK44 was monitored noninvasively in quartz sand under unsaturated-flow conditions within a 45- by 56- by 1-cm two-dimensional light transmission chamber. The spatial and temporal development of growth were mapped daily over 7 days by quantifying salicylate-induced bioluminescence. A nonlinear model relating the ...

This work studies a series of factors influencing erosion-corrosion in oilfield gathering pipelines steel using the home-made testing pipe flow loop. Results showed that was corroded oil-water flow. The corrosion rate increased with velocity on whole, and addition solid particles would intensify localized corrosion. For test added 2 wt% quartz sand at m/s, portion pure erosion accounted for 47....

This article analyzes the mechanism of protective layer formation under action alkali in a refractory castable when ground quartz sand (GQS) is used as an admixture to produce conventional castables (CC) and medium cement (MCC). It was found that, independently composition, addition GQS (2.5%) reduces degree K2CO3 dissolution at high temperature, released potassium reacts with silica forms visc...