Analysis of Teos Silicon Dioxide: The Identification of Carbonatious Contaminants

1997 ◽  
Vol 500 ◽  
Author(s):  
M. L. Pereira Da Silva ◽  
A. Romanelli Cardoso ◽  
J. J. Santiago-Aviles
Keyword(s):  
Surface Characterization ◽  
Chemical Properties ◽  
Total Carbon ◽  
Electrical Characteristics ◽  
Total Carbon Content ◽  
Raman Scattering Spectroscopy ◽  
Physico Chemical ◽  
Organometallic Precursors ◽  
Deposited Films

ABSTRACTThis work presents the analysis performed on a SiO2 film deposited from organometallic precursors with the aim of correlating their physico-chemical properties including electrical characteristics with processing variables. The characterization tools used in this study included SEM for film homogeneity; SIMS for the determination of total carbon content; FT-MS and Raman scattering spectroscopy for surface characterization. GC-MS was used to understand the electrochemical reactions taking place while performing I-V characteristics measurements.The use of these multiple characterization techniques pointed out to deposited films with reasonable deposition characteristics but poor electrical ones. Phase segregated heterogeneity's rich in carbonatious residues influenced the degradation of the electrical characteristics.

scholarly journals Comparison among Different Rewetting Strategies of Degraded Agricultural Peaty Soils: Short-Term Effects on Chemical Properties and Ecoenzymatic Activities

Agronomy ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1084
Author(s):  
Vittoria Giannini ◽  
Eleonora Peruzzi ◽  
Grazia Masciandaro ◽  
Serena Doni ◽  
Cristina Macci ◽  
...  
Keyword(s):  
Peat Soil ◽  
Management Strategies ◽  
Chemical Properties ◽  
Total Carbon ◽  
Available Phosphorus ◽  
Total Carbon Content ◽  
Peatland Restoration ◽  
Physico Chemical ◽  
Wetland System ◽  
Set Up

In 2013, a pilot experimental field of about 15 ha was set up within the basin of Lake Massaciuccoli (Tuscany, Italy) in order to compare different management strategies—a paludicultural system (PCS), a constructed wetland system (CWS), a nearly-natural wetland system (NWS)—for peatland restoration after almost a century of drainage-based agricultural use (CS). After five years, changes in peat soil quality were investigated from a chemical, biochemical, and ecoenzymatic perspective. The soil in CS was mainly characterized by oxidant conditions, higher content of overall microbial activity, low levels of easily available phosphorus for vegetation, and medium total carbon content ranging from 25.0% to 30.7%. In PCS, the levels of total carbon and the content of bioavailable P were higher, while the oxidant conditions were lower compared to the other systems. As expected, the soils in CWS and NWS were characterized by the most reduced conditions and by the highest levels of arylsulphatase activity. It was noteworthy that soils in the NWS systems were characterized by the highest level of nonavailable P. Outputs from ecoenzymatic activity confirmed the physico-chemical and biochemical results.

Determination of physico chemical properties of biodiesel from Citrullus lanatus seeds oil and diesel blends

2018 ◽  
Vol 122 ◽  
pp. 702-708 ◽  
Author(s):  
S. Sani ◽  
M.U. Kaisan ◽  
D.M. Kulla ◽  
A.I. Obi ◽  
A. Jibrin ◽  
...  
Keyword(s):  
Citrullus Lanatus ◽  
Chemical Properties ◽  
Physico Chemical

scholarly journals Diagnostics of boron deficiency for plants in reference to boron concentration in the soil solution  

2013 ◽  
Vol 59 (No. 8) ◽  
pp. 372-377 ◽  
Author(s):  
W. Szulc ◽  
B. Rutkowska
Keyword(s):  
Soil Properties ◽  
Soil Solution ◽  
Boron Concentration ◽  
Chemical Properties ◽  
Boron Deficiency ◽  
Organic C ◽  
Physico Chemical ◽  
Nutritional Needs ◽  
Cultivated Soils

The determination of a range of boron concentration in the soil solution, evaluation of the effect of physico-chemical soil properties on boron concentration in the soil solution as well verification whether boron quantity in the soil solution is sufficient for nutritional needs of selected plants cultivated in Poland were comprised. Average boron concentration in the soil solution of Poland&rsquo;s cultivated soils ranges from 0.59 to 5.07 &micro;mol/L and is differentiated by physico-chemical properties of soil. Taking into account decreasing effects of soil properties on the increase of boron concentration in the soil solution, the soil properties can be arranged as follows: organic C &gt;<br />soil abundance in available boron &gt; soil texture &gt; soil pH. The minimum boron quantity observed in the soil solution of Poland&rsquo;s cultivated soils was not sufficient to fulfil nutritional needs of the plants. The maximum boron quantity observed secured nutritional needs of cereals and potatoes but not those of rape plants and sugar beets. Based on the study it can be concluded that the measurement of the concentration of boron in the soil solution can be used in the diagnosis of deficiency of this element for crops.

scholarly journals Determination of Physico-chemical Properties of Aonla (Emblica officinalis Gaerth) Fruits among Different Populations in Garhwal Himalaya

2020 ◽  
Vol 20 (sup3) ◽  
pp. S1579-S1589
Author(s):  
Dinesh Chandra Naithani ◽  
J.M.S. Rawat ◽  
Bhupendra Singh ◽  
Vinod Prasad Khanduri ◽  
Manoj Kumar Riyal
Keyword(s):  
Chemical Properties ◽  
Garhwal Himalaya ◽  
Emblica Officinalis ◽  
Physico Chemical ◽  
Different Populations

Rapid determination of the total carbon content of titanium carbide

1972 ◽  
Vol 11 (6) ◽  
pp. 509-511 ◽  
Author(s):  
S. A. Bibinov ◽  
G. T. Dzodziev ◽  
V. K. Vitryanyuk ◽  
V. D. Petrenko
Keyword(s):  
Titanium Carbide ◽  
Carbon Content ◽  
Rapid Determination ◽  
Total Carbon ◽  
Total Carbon Content

Determination of site-specific management zones using soil physico-chemical properties and crop yields in coastal reclaimed farmland

Geoderma ◽  
2014 ◽  
Vol 232-234 ◽  
pp. 381-393 ◽  
Author(s):  
Rong-Jiang Yao ◽  
Jing-Song Yang ◽  
Tong-Juan Zhang ◽  
Peng Gao ◽  
Xiang-Ping Wang ◽  
...  
Keyword(s):  
Crop Yields ◽  
Chemical Properties ◽  
Site Specific ◽  
Management Zones ◽  
Physico Chemical ◽  
Specific Management

scholarly journals Determination of the influence of organic and inorganic impurity on physico-chemical properties of detergent zeolite type 4A

2016 ◽  
Vol 57 (4) ◽  
pp. 523-532
Author(s):  
Danijela Rajic ◽  
Dragan Toskovic ◽  
Ljubica Vasiljevic ◽  
Zeljko Ostojic
Keyword(s):  
Chemical Properties ◽  
Physico Chemical ◽  
Zeolite Type

scholarly journals New QSAR and Solvatochromic Estimation of Molecular Parameters of Chlortetracycline

2020 ◽  
Vol 71 (2) ◽  
pp. 121-127
Author(s):  
Antonina Gritco-Todirascu ◽  
Dorina Emilia Creanga ◽  
Liliana Mihaela Ivan ◽  
Dana Ortansa Dorohoi ◽  
Anamaria Ciubara
Keyword(s):  
Biological Activity ◽  
Chemical Properties ◽  
Basic Structure ◽  
Variation Method ◽  
Absorption Bands ◽  
Spectral Shifts ◽  
Physico Chemical ◽  
Excited State Dipole Moment ◽  
Qsar Parameters

The present paper is focused on determination of the main parameters of Chlortetracycline. Chlortetracycline belongs to one of the most used family of antibiotics worldwide, Tetracyclines. Because of the large spectrum of infections which can be treated with this category of antibiotics there are attempts to find new derivatives from this class. The compounds derived from the same basic structure exhibit same chemical properties, that is why knowing in detail the main physico-chemical properties of Chlortetracycline could be a real help in synthesize new efficient derivatives. In order to evaluate the reactivity and biological activity HyperChem was used to establish the optimized structure, the electro-optical, the energetic and QSAR parameters. The solvatochromic methods allowed determining the intermolecular interactions types and their contribution to the spectral shifts of measured electronic absorption bands. Based on computational and solvatochromic results, the excited state dipole moment of Chlortetracycline was established by variation method.

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