3/19/2023 0 Comments Grand truck simulator 2 1.0.29c![]() ![]() Hamdane, Mohamed Moncef Bougrine, Fethi Msakni, Issam Dhaoui-Ghozzi, Amen Bouziani, Ammar Le kyste hydatique du cordon spermatique: une localisation exceptionnelle It also shows that desert sand microbiomes can vary depending on conditions, with broad implications for sandstone monument bacterial communities This work shows that the Jizan desert area of Saudi Arabia can contain a diverse bacterial community on the sand and surrounding the roots of pioneer desert plants. The most abundant members found in the samples belong to the Bacteroidetes, Firmicutes and Proteobacteria phyla. The Chao1 estimation of the bacterial diversity fluctuated from 637 to 2,026 OTUs for a given sample. The results showed a total of 3,530 OTUs in the five samples, calculated using ≥ 97% sequence similarity levels. We examined five different samples, four from the rhizosphere of pioneer plants plus a surface sand sample, and used pyrosequencing of PCR-amplified V1-V3 regions of 16S rDNA genes from total extracted DNA to reveal and compare the bacterial population diversity of the samples. The Jizan desert area, located in Saudi Arabia, supports particular vegetation that grows in the large sandy flat terrain. These extreme environments can influence the microbial community present on the surface sands and any rhizosphere members surrounding desert plant roots. Life in arid regions and, in particular, hot deserts is often limited due to their harsh environmental conditions, such as large temperature fluctuations and low amounts of water. Zelicourt, Axel de Bisseling, Ton Geurts, Rene Hirt, Heribert DuBow, Michael S. Such information will be needed in future environmental, toxicological, epidemiological, and source apportionment studies.īacterial Rhizosphere Biodiversity from Several Pioneer Desert Sand Plants Near Jizan, Saudi Arabia The suite of techniques used in this study has yielded an in-depth characterization of sand particles. Results suggest that carbon and other contaminant fine particles were produced by fossil-fuel combustion and industrial emissions in heavily industrialized areas of Haifa and Yanbu, and transported as cloud condensation nuclei to Douf Mountain. Fe, C, O, Ti, Si, V, and S dominated the composition of black sand. Aqueous extracts of black sands were acidic (pH = 5.0. Morphological Scanning Electron Microscopy (SEM and Laser Scanning Microscopy (LSM analyses revealed that the black sand contained fine and ultrafine particles (50 to 500 nm ranges and was strongly magnetic, indicating the mineral magnetite or elemental iron. Black sand particles exhibited different morphologies and microstructures (surface roughness compared with the white sand and volcanic sand. White sand was comprised of natural coarse particles linked to wind-blown releases from crustal surfaces, weathering of igneous/metamorphic rock sources, and volcanic activities. The study used multiple high resolution electron microscopies to study the morphologies, emission source types, size, and elemental composition of the particles, and to evaluate the presence of surface “coatings or contaminants†deposited or transported by the black sand particles. Three categories of sand were studied: black sand, white sand, and volcanic sand. This study determines the microscopic make-up of different varieties of sand particles collected at a sand dune site in Badr, Saudi Arabia in 2012. Study of Black Sand Particles from Sand Dunes in Badr, Saudi Arabia Using Electron Microscopyįull Text Available Particulate air pollution is a health concern. By choosing another non-dominated result in the solution space, air pollutants emission outside the cordon and the whole network can be reduced without a significant reduction in social welfare. Therefore, it is necessary to consider air pollutants emission. ![]() In addition, cordon pricing is a multi-objective problem. The results reveal that this multi-objective model can be a useful tool for the sustainable and optimal design of the cordon and P&R scheme. A solution algorithm is also presented based on the second version of strength Pareto evolutionary algorithm (SPEA2. Therefore, in this paper, a multi-objective bi-level optimization model is developed. Hence, air pollutants emission may only transfer from inside of the cordon to its outside. Although air pollutants emission decreases within the cordon by the implementation of cordon pricing scheme, it may increase outside the cordon and the whole network. Cordon Pricing Considering Air Pollutants Emissionĭirectory of Open Access Journals (Sweden)įull Text Available This paper considers the issue of air pollutants emission for the optimal and sustainable determination of cordon location, toll level, and price of park and ride (P&R.
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