Chemical Composition of Dust Storms in Agricultural Areas of Arid Land in KSA

2020 ◽  
Vol 14 (1) ◽  
pp. 13-20
Author(s):  
Abdulaziz B. Alharbi
Keyword(s):  
Chemical Composition ◽  
Dust Storms ◽  
Arid Land ◽  
Agricultural Areas

The chemical composition of aerosols settling in Israel following dust storms

1991 ◽  
Vol 25 (12) ◽  
pp. 2665-2670 ◽  
Author(s):  
E. Ganor ◽  
H.A. Foner ◽  
S. Brenner ◽  
E. Neeman ◽  
N. Lavi
Keyword(s):  
Chemical Composition ◽  
Dust Storms

scholarly journals Chemical Composition, Vitamin and Fatty Acid Profile of Meat from Carcass Cuts of Indigenous Goat in Tunisian Arid Land

2020 ◽  
Vol 18 (10) ◽  
pp. 291-297
Author(s):  
Naziha Ayeb ◽  
Maha Hammouda ◽  
Mohamed Dbara ◽  
Mohamed Chniter ◽  
Belgacem Lachiheb ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Chemical Composition ◽  
Fatty Acid Profile ◽  
Arid Land ◽  
Indigenous Goat ◽  
Carcass Cuts

A comparative evaluation of water uptake on several mineral dust sources

2010 ◽  
Vol 7 (2) ◽  
pp. 162 ◽  
Author(s):  
Juan G. Navea ◽  
Haihan Chen ◽  
Min Huang ◽  
Gregory R. Carmichel ◽  
Vicki H. Grassian
Keyword(s):  
Chemical Composition ◽  
Relative Humidity ◽  
Dust Particle ◽  
Water Uptake ◽  
Mineral Dust ◽  
Dust Storms ◽  
Dust Aerosol ◽  
Dust Particles ◽  
Particle Interactions ◽  
Dust Sources

Environmental context. Dust particles produced from wind blown soils are of global significance as these dust particles not only impact visibility, as evident in the recent 2009 Australian dust storm, but also atmospheric chemistry, climate and biogeochemical cycles. The amount of water vapour in the atmosphere (relative humidity) can play a role in these global processes yet there are few studies and little quantitative data on water-dust particle interactions. The focus of this research is on quantifying water-dust particle interactions for several dust sources including Asia and Africa where dust storms are most prevalent. Abstract. Mineral dust aerosol provides a reactive surface in the troposphere. The reactivity of mineral dust depends on the source region as chemical composition and mineralogy of the aerosol affects its interaction with atmospheric gases. Furthermore, the impact of mineral dust aerosol in atmospheric processes and climate is a function of relative humidity. In this study, we have investigated water uptake of complex dust samples. In particular, water uptake as a function of relative humidity has been measured on three different dust sources that have been characterised using a variety of bulk and surface techniques. For these well-characterised dust samples, it is shown that although there are variations in chemical composition and mineralogy, on a per mass basis, water uptake capacities for the three dusts are very similar and are comparable to single component clay samples. These results suggest that the measured uptake of water of these bulk samples is dominated by the clay component.

scholarly journals Chemical composition of dust storms in Beijing and implications for the mixing of mineral aerosol with pollution aerosol on the pathway

2005 ◽  
Vol 110 (D24) ◽  
Author(s):  
Yele Sun ◽  
Guoshun Zhuang ◽  
Ying Wang ◽  
Xiujuan Zhao ◽  
Jie Li ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Dust Storms

Chemical composition of PM2.5 in an urban environment in Chengdu, China: Importance of springtime dust storms and biomass burning

2013 ◽  
Vol 122 ◽  
pp. 270-283 ◽  
Author(s):  
Jun Tao ◽  
Leiming Zhang ◽  
Guenter Engling ◽  
Renjian Zhang ◽  
Yihong Yang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Urban Environment ◽  
Biomass Burning ◽  
Dust Storms

scholarly journals Spatial Shift of Aridity and Its Impact on Land Use of Syria

2019 ◽  
Vol 11 (24) ◽  
pp. 7047 ◽  
Author(s):  
Mohammad Rajab Houmsi ◽  
Mohammed Sanusi Shiru ◽  
Mohamed Salem Nashwan ◽  
Kamal Ahmed ◽  
Ghaith Falah Ziarh ◽  
...  
Keyword(s):  
Potential Evapotranspiration ◽  
Arid Land ◽  
Climate Data ◽  
Princeton University ◽  
The North ◽  
Spatial Shift ◽  
Spatiotemporal Trends ◽  
Analysis Of Results ◽  
Agricultural Areas ◽  
Semi Arid

Expansion of arid lands due to climate change, particularly in water stressed regions of the world can have severe implications on the economy and people’s livelihoods. The spatiotemporal trends in aridity, the shift of land from lower to higher arid classes and the effect of this shift on different land uses in Syria have been evaluated in this study for the period 1951–2010 using high-resolution monthly climate data of the Terrestrial Hydrology Research Group of Princeton University. The trends in rainfall, temperature and potential evapotranspiration were also evaluated to understand the causes of aridity shifts. The results revealed an expansion of aridity in Syria during 1951–1980 compared to 1981–2010. About 6.21% of semi-arid land was observed to shift to arid class and 5.91% dry-subhumid land to semi-arid land between the two periods. Analysis of results revealed that the decrease in rainfall is the major cause of increasing aridity in Syria. About 28.3% of agriculture land located in the north and the northwest was found to shift from humid to dry-subhumid or dry-subhumid to semi-arid. Analysis of results revealed that the shifting of drylands mostly occurred in the northern agricultural areas of Syria. The land productivity and irrigation needs can be severely affected by increasing aridity which may affect food security and the economy of the country.

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

On the Inhomogeneity of Chemical Composition over the Surface of 21 Per

1976 ◽  
Vol 32 ◽  
pp. 343-349
Author(s):  
Yu.V. Glagolevsky ◽  
K.I. Kozlova ◽  
V.S. Lebedev ◽  
N.S. Polosukhina
Keyword(s):  
Chemical Composition ◽  
Spectral Line ◽  
Variable Star ◽  
Radial Velocities ◽  
Crimean Astrophysical Observatory ◽  
Line Intensities ◽  
Magnetic Variable

SummaryThe magnetic variable star 21 Per has been studied from 4 and 8 Å/mm spectra obtained with the 2.6 - meter reflector of the Crimean Astrophysical Observatory. Spectral line intensities (Wλ) and radial velocities (Vr) have been measured.

Structural Studies on Mitotic Spindle Fibres

1978 ◽  
Vol 36 (3) ◽  
pp. 615-626
Author(s):  
J.R. Mcintosh
Keyword(s):  
Chemical Composition ◽  
Mitotic Spindle ◽  
Structural Studies ◽  
Mitotic Apparatus ◽  
Chemical Studies ◽  
Medical Interest ◽  
Spindle Fibres

The mitotic apparatus is a structure of obvious biological and medical interest, but it has proved to be a difficult cellular machine to understand. The chemical composition of the spindle is only slightly elucidated, largely because of the difficulties in preparing useful isolates of the structure. Chemical studies of the mitotic spindle have been reviewed elsewhere (Mcintosh, 1977), and will not be discussed further here. One would think that structural studies on the mitotic apparatus (MA) in situ would be straightforward, but even with this approach there is some disagreement in the results obtained with various methods and by different investigators. In this paper I will review briefly the approaches which have been used in structural studies of the MA, pointing out the strengths and problems of each approach. I will summarize the principal findings of the different methods, and identify what seem to be fruitful avenues for further work.

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