botany, also called plant science s , plant biology or phytology, is the science of plant life and a branch of biology. a botanist, plant scientist or phytologist is a scientist who specialises in this field. the term 'botany' comes from the ancient greek word βοτάνη botanē meaning ' pasture ', ' grass ', or ' fodder .
there is no clear relationship between the size of soil mineral components and their mineralogical nature: sand and silt particles can be calcareous as well as siliceous, while textural clay 0.002 mm 7.9 × 10 −5 in can be made of very fine quartz particles as well as of multi-layered secondary minerals.
a hydrothermal vent is a fissure on the seafloor from which geothermally heated water issues. hydrothermal vents are commonly found near volcanically active places, areas where tectonic plates are moving apart at spreading centers, ocean basins, and hotspots. hydrothermal deposits are rocks.
with regard to mineral dressing research, reference was made to comminution, mineral breakage, particle size control, and flotation kinetics. regarding mineral processing and hydrometallurgy, mention is made of extraction of uranium values from refractory ores, solvent-in-pulp extraction of metal values, and solar heating of leaching circuits.
nakhodka fertilizer plant translit. nahodkinsky zavod mineralnih udobrenii abbreviated as nzmu , russian : зао «находкинский завод минеральных удобрений is an investment project for the construction of a plant for the production of methanol and nitrogen fertilizers in primorsky region .
soil texture is a classification instrument used both in the field and laboratory to determine soil classes based on their physical texture. soil texture can be determined using qualitative methods such as texture by feel, and quantitative methods such as the hydrometer method.
plankton are primarily divided into broad functional or trophic level groups: . phytoplankton from greek phyton, or plant , are autotrophic prokaryotic or eukaryotic algae that live near the water surface where there is sufficient light to support photosynthesis.among the more important groups are the diatoms, cyanobacteria, dinoflagellates and coccolithophores.
the group's scope includes mineral-forming microorganisms, which exist on nearly every rock, soil, and particle surface spanning the globe to depths of at least 1600 metres below the sea floor and 70 kilometres into the stratosphere possibly entering the mesosphere .
idioblasts are isolated plant cells which differ from neighboring tissues and contain non-living substances. they have various functions such as storage of reserves, excretory materials, pigments, and minerals.
plant growth, root development, and seed and fruit development are usually reduced in potassium-deficient plants. often, potassium deficiency symptoms first appear on older lower leaves because potassium is a mobile nutrient, meaning that a plant can allocate potassium to younger leaves when it is k deficient.
paperboard is a thick paper-based material.while there is no rigid differentiation between paper and paperboard, paperboard is generally thicker usually over 0.30 mm, 0.012 in, or 12 points than paper and has certain superior attributes such as foldability and rigidity. according to iso standards, paperboard is a paper with a grammage above 250 g/m 2, but there are exceptions.
lignin is a class of complex organic polymers that form key structural materials in the support tissues of vascular plants and some algae. lignins are particularly important in the formation of cell walls, especially in wood and bark, because they lend rigidity and do not rot easily.chemically, lignins are cross-linked phenolic polymers.
cement board is composed of aggregated portland cement with a glass-fiber mesh on the surfaces. this 5/16 inch 7.9 mm thick cement board is designed as an underlayment for tile floors. these are 3 by 5 foot 91 by 152 cm sheets. a cement board is a combination of cement and reinforcing fibers formed into 3 by 5 feet 91 by 152 cm sheets, 1 .
magnesium oxide, more commonly called magnesia, is a versatile mineral that when used as part of a cement mixture and cast into thin cement panels under proper curing procedures and practices can be used in residential and commercial building construction. some versions are suitable for a wide range of general building uses and for applications that require fire resistance, mold and mildew control, as well as sound control applications and many other benefits.
in modern coal-fired power plants, fly ash is generally captured by electrostatic precipitators or other particle filtration equipment before the flue gases reach the chimneys. together with bottom ash removed from the bottom of the boiler, it is known as coal ash.