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Magnesium oxide
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Cùng tham khảo “Đề thi học kì 1 môn KHTN lớp 8 năm 2023-2024 có đáp án - Trường THCS Lê Quý Đôn, Tiên Phước” được chia sẻ dưới đây để giúp các em biết thêm cấu trúc đề thi như thế nào, rèn luyện kỹ năng giải bài tập và có thêm tư liệu tham khảo chuẩn bị cho kì thi sắp tới đạt điểm tốt hơn.
11p
khanhchi0990
20-06-2024
1
0
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Sugarcane bagasse ash (SCBA) is an industrial waste that consists of silicon oxides, calcium, aluminum, iron, magnesium, and alkali metal oxides. The composition and structure of thermomechanical treated SCBA was analyzed by X-ray fluorescence (XRF), Scanning Electron Microscopy (SEM) and X-Ray diffraction (XRD). Thermomechanical treated SCBA was mixed with clay, quartz and feldspar at different compositions according to an appropriate mixing ratio and using this mixture for the production of dry pressed ceramic tiles.
6p
dianmotminh02
03-05-2024
5
1
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This paper presents the influence of oxidizer/fuel ratios on several energetic characteristics (the heat of combustion, gaseous volume, burning rate) of the red flame pyrotechnic containing strontium nitrate, magnesium, polyvinyl chloride, and novolac resin.
9p
viengels
25-08-2023
5
3
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This study examines the effects of iron (III) oxide (Fe2O3) nanoparticles on the burning characteristics (i.e., the heat of combustion, the burning rate, and the infrared radiance) of the pyrotechnic composition based on Magnesium-Teflon-Viton (MTV).
12p
viengels
25-08-2023
3
3
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Microarc oxidation method has been developed in the field of surface protection of magnesium alloys and considered as a simple, highly effective, commercial and environmentally friendly method in industry. MAO coatings are fabricated on novel Mg-AlLi-Zn alloy to improve the anti-corrosion performance of surface by using friendly alkaline electrolytes under a high electrical potential.
5p
vichristinelagarde
04-07-2022
7
1
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Microcirculatory alterations play a pivotal role in sepsis and persist despite correction of systemic hemodynamic parameters. Therefore it seems tempting to test specific pro-microcirculatory strategies, including vasodilators, to attenuate impaired organ perfusion. As opposed to nitric oxide donors, magnesium has both endothelium-dependent and non-endothelium-dependent vasodilatory pathways.
6p
viisaacnewton
26-04-2022
12
1
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Magnesium borates can be used as detergent compounds or hydrocarbon catalyzers and in the ceramics industry for superconductor material manufacture owing to their high elastic coefficient and resistance to corrosion at high temperatures. In the present study, the synthesis of magnesium borate was facilitated via a novel ultrasonic method of mixing and the identification and characterization of the material were carried out via X-Ray diffraction (XRD), Fourier transform infrared (FT-IR), and Raman spectroscopies, and the B2 O3 content was determined through titration.
14p
langthannam
29-12-2021
12
0
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Synthesis of the magnesium type of the mineral boracite (Mg 3 B7 O13 Cl) was studied. Several parameters affecting boracite synthesis were investigated. The raw materials selected were magnesium chloride hexahydrate (MgCl 2 .6H2 O), magnesium oxide (MgO), and boron oxide (B2 O3). Reaction temperatures were selected between 600 ◦ C and 900 ◦ C. Moreover, three different reaction times of 4, 1, and 0.5 h were studied with the determined optimum molar ratio, reaction temperature, and reaction medium.
13p
langthannam
29-12-2021
11
0
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The composite adsorbent exhibited an excellent adsorption capacity towards three types of ions and heavy metals that are found in acid sulfate water. After treating with agarose/MgO, the concentrations of Fe and Al decreased from 60.28 and 604.84 µg/l, respectively, to under 3.42 and 1.78 µg/l, respectively. These exceptional results reveal the potential uses of agarose/MgO composites as adsorbents in the treatment of acid sulfate water.
5p
princessmononoke
29-11-2021
9
1
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Nitric oxide is one of the most important biochemical parameters in biological processes; it is also known as carcinogenic. There is need for the design of stable and durable solid phase nitric oxide sensors. In this study, we immobilized the nitric oxide sensitive molecules pyrene, tris(2,2’-bipyrdyl)dichlororuthenium(II) hexahydrate (Ru(bipy) 2+ 3 ), and magnesium phthalocyanine (Mg-Pc) for the first time in polymeric or glassy matrices. We applied silver nanoparticles and ionic liquids in the fabrication process of polymeric electrospun fibers and thin films.
16p
tudichquannguyet
29-11-2021
5
1
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Mục tiêu của nghiên cứu này nhằm sử dụng các phương pháp hóa học tính toán để nghiên cứu phản ứng hydrogen hóa CO2 trên các hệ xúc tác trên cơ sở nickel; xây dựng các đường phản ứng, dự đoán đường phản ứng ưu tiên; so sánh và đánh giá khả năng xúc tác của các hệ vật liệu trên cơ sở nickel; làm rõ vai trò của chất mang. Mời các bạn cùng tham khảo.
177p
cucngoainhan2
02-11-2021
19
5
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This paper presents the influence of oxidizer/fuel ratios on several energetic characteristics (combustion heat, gaseous volume, burning rate) of the red flame pyrotechnic containing potassium perchlorate, magnesium, strontium carbonate, polyvinyl chloride, and novolac resin.
7p
vijenchae2711
21-07-2021
18
1
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Mục đích nghiên cứu của Luận án nhằm sử dụng các phương pháp hóa học tính toán để nghiên cứu phản ứng hydrogen hóa CO2 trên các hệ xúc tác trên cơ sở nickel; xây dựng các đường phản ứng, dự đoán đường phản ứng ưu tiên; so sánh và đánh giá khả năng xúc tác của các hệ vật liệu trên cơ sở nickel. Mời các bạn cùng tham khảo!
27p
thebadguys
08-06-2021
14
3
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The structural characterization showed a fine distribution of MeOx metal oxides on magnesium silicate nanobars. The sepiolite-loaded-metal oxide catalysts have been screened for the partial oxidation of benzyl alcohol and shown a good conversion and a very high selectivity to benzaldehyde at mild conditions.
7p
tamynhan4
06-09-2020
11
1
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The second one is form by titanium oxide of the Magnéli phases, Magnesium titanates, Magnesium oxide and Titanium. Product distribution of each reactor exhibit a huge variation depends of the specific configuration and a 100% of Strongly reduce product can be reached.
18p
cleopatrahuynh
01-06-2020
18
0
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Thanks to its specific chemical and physical properties, graphene has aroused growing interest in many fields of Science and Technology. The present study focuses on the properties of microcrystalline chitosan (MCCh): A compound known to increase the biocompatibility of various matrices, including those made of graphene layers, enabling the controlled release of molecules of therapeutic compounds.
9p
vijiraiya2711
27-05-2020
9
1
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Magnesium (Mg) deficiency causes physiological and molecular responses, already dissected in several plant species. The study of these responses among genotypes showing a different tolerance to the Mg shortage can allow identifying the mechanisms underlying the resistance to this nutritional disorder.
17p
vishikamaru2711
25-04-2020
12
1
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The production of the bioethanol from the vast quantity of ligno-cellulosic (LC) biomass using cellulases and yeasts has been suggested as an alternate energy source and offers potential to reduce the burden on fast depleting fossil fuel reservoirs. The major bottlenecks in commercial production of second generation bioethanol are complex feed stocks, high cost of enzymes and non-availability of co-fermenting yeasts.
13p
kethamoi4
18-04-2020
9
0
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Magnesium (Mg) is the structural component of chlorophyll and polysaccharides and also an activator of several enzymes. Magnesium plays an important role in photosynthesis. An attempt was made in the present investigation on utilizing this property for increasing rate of photosynthesis of maize plant and subsequently higher root exudations which enhance the microbial activities in soil. Green house experiments were conducted to evaluate the effect of MgO nano particles spray on maize plant (Zea mays L.) in three benchmark soils of India which are phosphorus (P) deficient.
10p
caygaocaolon2
11-03-2020
14
1
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The present study is to deal with the distribution of Cr2O3 particles over sepiolite which was known as a fibrous clay mineral with peculiar surface properties [10]. Indeed, sepiolite is constructed of magnesium silicate fibers. A block is composed of an octahedral Mg-OH layer intercalating between two tetrahedrally structured SiO4 planes.
8p
abcxyz123_02
03-03-2020
14
0
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