Results 31 to 40 of about 127,546 (339)

EFFECT OF BIOCHAR ON K AND P RELEASE FROM K-FELDSPAR & ROCK PHOSPHATE AND ITS IMPACT ON SOME GROWTH PARAMETER OF MAIZE PLANT [PDF]

open access: yesArab Universities Journal of Agricultural Sciences, 2019
Pot experiments were carried out using sand (collected from Ismailia ARS), in the greenhouse to study the effect of biochar application, on K and P release from their natural bearing minerals i.e.,K- feldspar and rock phosphate and\or bentonite on some ...
Manal El mahdy   +3 more
doaj   +1 more source

Role of Soluble Starch in the Flotation Separation of Feldspar and Quartz

open access: yesKuangchan zonghe liyong, 2022
The role of soluble starch in the flotation separation of feldspar from quartz was revealed through the single mineral flotation test, potentiodynamic test and absorption measurement.
Yaxiong Xiao, Qing Shi, Qiming Feng
doaj   +1 more source

Congo River sand and the equatorial quartz factory [PDF]

open access: yes, 2019
A never solved problem in sedimentary petrology is the origin of sandstone consisting exclusively of quartz and most durable heavy minerals. The Congo River offers an excellent test case to investigate under which tectonic, geomorphological, climatic ...
Andò, Sergio   +10 more
core   +1 more source

Sintering and mechanical properties of porcelains prepared from algerian raw materials Sinterização e propriedades mecânicas de porcelanas preparadas com matéria-prima argelina

open access: yesCerâmica, 2011
Porcelain is a type of ceramics highly valued for its beauty and strength. The overall goal of this work is to utilize local raw materials within the following fractions: 37 wt.% kaolin, 35 wt.% feldspar and 28 wt.% quartz.
S. Kitouni, A. Harabi
doaj   +1 more source

Soil formation in high elevation and permafrost areas in the Qinghai Plateau (China) Edafogénesis en zonas elevadas y con permafrost en el Plateau Qunghai (China) Formação do solo em áreas de elevada altitude e em ambientes"permafrost" do planalto de Qinghai Plateau (China) [PDF]

open access: yesSpanish Journal of Soil Science, 2012
<p style="text-align: justify;">Soil systems continuously gain and lose matter and energy even in areas where climate is too harsh to support the higher plants such as in high elevations and in permafrost environments. The purpose of this
Joselito Arocena   +2 more
doaj   +1 more source

Observation of centimetre-scale argon diffusion in alkali feldspars: implications for 40Ar/39Ar thermochronology [PDF]

open access: yes, 2013
New data from a gem-quality feldspar from Itrongay, Madagascar, record naturally occurring 40Ar/39Ar age profiles which can be numerically modelled by invoking a single diffusion mechanism and show that microtexturally simple crystals are capable of ...
Flude, Stephanie   +5 more
core   +3 more sources

Tectonic history of the South Tannuol Fault Zone (Tuva region of the northern Central Asian Orogenic Belt, Russia) : constraints from multi-method geochronology [PDF]

open access: yes, 2020
In this study, we present zircon U/Pb, plagioclase and K-feldspar Ar-40/Ar-39 and apatite fission track (AFT) data along the South Tannuol Fault Zone (STFZ).
De Grave, Johan   +6 more
core   +1 more source

Review for High-purity Quartz (SiO2) (PartⅠ): Activation and Separation of Trace, Fine-grain Alumino Silicate Gangue

open access: yesKuangchan zonghe liyong, 2022
High-purity quartz, famous for low impurities and high purity, has been widely used in optical fiber communication, photovoltaic, aerospace, semiconductor displayand other high-tech industries.
Min Lin   +8 more
doaj   +1 more source

How large are departures from lithostatic pressure? Constraints from host-inclusion elasticity [PDF]

open access: yes, 2015
Minerals trapped as inclusions within other host minerals will develop non-lithostatic pressures during both prograde and retrograde metamorphism because of the differences between the thermo-elastic properties of the host and inclusion phases.
Adams   +39 more
core   +1 more source

Efeito da modificação da composição química na sinterização e microestrutura de porcelanas de ossos bovinos Effect of chemical composition modification on sinterability and microstructure of bone china

open access: yesCerâmica, 2010
Bone china é um tipo especial de porcelana que foi primeiramente desenvolvida no Reino Unido e é caracterizada pela alta resistência mecânica, grande alvura e translucidez.
D. Gouvêa, S. Hirakata, H. Kahn
doaj   +1 more source

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