Tortilla chips made with white sorghum and corn: Comparison of sensory and physicochemical characteristics with corn‐made commercial products

2020 ◽  
Vol 44 (9) ◽  
Author(s):  
Ana Luisa Gutiérrez‐Salomón ◽  
Victoria Guadalupe Aguilar‐Raymundo ◽  
Jahir Antonio Barajas‐Ramírez
Keyword(s):  
Physicochemical Characteristics ◽  
Commercial Products ◽  
Tortilla Chips

Physicochemical and Microbiological Profile of Packed Table Olives

2004 ◽  
Vol 67 (10) ◽  
pp. 2320-2325 ◽  
Author(s):  
A. LÓPEZ-LÓPEZ ◽  
P. GARCÍA-GARCÍA ◽  
M. C. DURÁN-QUINTANA ◽  
A. GARRIDO-FERNÁNDEZ
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Water Activity ◽  
Physicochemical Characteristics ◽  
Table Olives ◽  
Spontaneous Fermentation ◽  
Commercial Products ◽  
Mean Values ◽  
Low Levels ◽  
Alkaline Oxidation

The water activity of different commercial products of table olives as well as their physicochemical and microbiological profiles were studied. Average values of water activity were 0.976, 0.977, and 0.990 for green, directly brined, and ripe (by alkaline oxidation) olives, respectively. Mean values of pH were 3.69, 3.92, and 6.52 while salt levels were 5.53, 4.98, and 2.55 for the same commercial products. In some of the commercial products of green and directly brined olives that were examined, a certain level of microorganisms was observed. Most of them were lactic acid bacteria and yeasts, the lactic acid bacteria being more abundant than the yeasts. Traditionally, this flora has not been considered harmful due to its resemblance to that found in natural and spontaneous fermentation. Spore-forming mesophilic aerobes, which can be considered contaminants from ingredient or product handling, were present in only some samples and were always at low levels. However, their detection does not cause any concern regarding safety because there is no reference showing that they can grow in any of the products studied given the physicochemical characteristics found.

scholarly journals Analysis of gas condensate and its different fractions of Bibiyana gas field to produce valuable products

2015 ◽  
Vol 50 (1) ◽  
pp. 59-64 ◽  
Author(s):  
SMA Sujan ◽  
MS Jamal ◽  
M Hossain ◽  
M Khanam ◽  
M Ismail
Keyword(s):  
Sulfur Content ◽  
Diesel Fuel ◽  
Octane Number ◽  
Physicochemical Characteristics ◽  
Gas Condensate ◽  
Gas Field ◽  
Commercial Products ◽  
Fuel Pump ◽  
Boiling Range ◽  
Pump Station

Physicochemical characteristics of raw gas condensate from Bibiyana gas field, commercial motor spirit, kerosene and diesel fuel as well as products obtained from gas condensate were determined. Experiments were carried out to take apart motor spirit, kerosene and diesel from gas condensate based on boiling ranges. The analysis revealed that collected gas condensate contains more than 50% is motor spirit (regular octane/petrol) in the boiling range of 21-1450C, 23% is kerosene in the boiling range of 140-2210C and 24-25% is diesel in the boiling range of 178-3350C. Remaining 2-3% is found as residue and system loss. The characteristics of different fractions (Motor spirit, Kerosene & Diesel) obtained from condensate are very comparable to commercial products (collected from nearby fuel pump station supplied by Meghna petroleum) and BSTI standard except two properties of petrol (octane number and sulfur content). The octane number of motor spirit is increased by adding 5% of supper octane or ethanol or MTBE.Bangladesh J. Sci. Ind. Res. 50(1), 59-64, 2015

Applications of SEM/EDXA in cement clinker investigation

1990 ◽  
Vol 48 (4) ◽  
pp. 870-871
Author(s):  
Arezki Tagnit-Hamou ◽  
Shondeep L. Sarkar
Keyword(s):  
Mineralogical Composition ◽  
Physicochemical Characteristics ◽  
Cement Clinker ◽  
Accurate Information ◽  
Phase Identification ◽  
History Of ◽  
Bulk Chemical ◽  
Resolution Imaging ◽  
Proven Method ◽  
Instantaneous Chemical

All the desired properties of cement primarily depend on the physicochemical characteristics of clinker from which the cement is produced. The mineralogical composition of the clinker forms the most important parameter influencing these properties.Optical microscopy provides reasonably accurate information pertaining to the thermal history of the clinker, while XRDA still remains the proven method of phase identification, and bulk chemical composition of the clinker can be readily obtained from XRFA. Nevertheless, all these microanalytical techniques are somewhat limited in their applications, and SEM/EDXA combination fills this gap uniquely by virtue of its high resolution imaging capability and possibility of instantaneous chemical analysis of individual phases.Inhomogeneities and impurities in the raw meal, influence of kiln conditions such as sintering and cooling rate being directly related to the microstructure can be effectively determined by SEM/EDXA. In addition, several physical characteristics of cement, such as rhcology, grindability and hydraulicity also depend on the clinker microstructure.

Common modifications of selenocysteine in selenoproteins

2019 ◽  
Vol 64 (1) ◽  
pp. 45-53 ◽  
Author(s):  
Elias S.J. Arnér
Keyword(s):  
Amino Acids ◽  
Covalent Binding ◽  
Physicochemical Characteristics ◽  
Redox Active

Abstract Selenocysteine (Sec), the sulfur-to-selenium substituted variant of cysteine (Cys), is the defining entity of selenoproteins. These are naturally expressed in many diverse organisms and constitute a unique class of proteins. As a result of the physicochemical characteristics of selenium when compared with sulfur, Sec is typically more reactive than Cys while participating in similar reactions, and there are also some qualitative differences in the reactivities between the two amino acids. This minireview discusses the types of modifications of Sec in selenoproteins that have thus far been experimentally validated. These modifications include direct covalent binding through the Se atom of Sec to other chalcogen atoms (S, O and Se) as present in redox active molecular motifs, derivatization of Sec via the direct covalent binding to non-chalcogen elements (Ni, Mb, N, Au and C), and the loss of Se from Sec resulting in formation of dehydroalanine. To understand the nature of these Sec modifications is crucial for an understanding of selenoprotein reactivities in biological, physiological and pathophysiological contexts.

Phytochemical investigation of Noni fruit (Morinda citrifolia) and Noni-derived commercial products

Planta Medica ◽  
2006 ◽  
Vol 72 (11) ◽  
Author(s):  
O Potterat ◽  
P Dalsgaard ◽  
F Dieterle ◽  
T Paululat ◽  
T Kühn ◽  
...  
Keyword(s):  
Morinda Citrifolia ◽  
Commercial Products ◽  
Phytochemical Investigation

Study of the quality and antioxidant properties of tomatoes (Solanum lycopersicum L.) under different postharvest and dehydration conditions

2020 ◽  
Vol 13 (9) ◽  
Author(s):  
María Lorena Luna-Guevara ◽  
Teresita González-Sánchez ◽  
Adriana Delgado-Alvarado ◽  
María Elena Ramos-Cassellis ◽  
José Guillermo Pérez-Luna ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Rural Communities ◽  
Antioxidant Properties ◽  
Titratable Acidity ◽  
Physicochemical Characteristics ◽  
Soluble Solids ◽  
Convective Drying ◽  
Tomato Fruits ◽  
Solanum Lycopersicum L ◽  
Storage Temperatures

Objective: To study the effect of storage temperatures and dehydration conditions (solar and convective drying; SD, CD), on the quality, physicochemical parameters and antioxidant properties of tomato fruits. Methodology: The physicochemical characteristics pH, titratable acidity, soluble solids (°Bx) and color parameters (L*, a* and b*), were evaluated. The lycopene, carotenoids and antioxidant activity percentages retention of tomatoes fruits stored at 7 and 22 ° C for 5 days and subjected to SD (Temperature (T) of 67 °C and luminescence of 685 lum/sqf) and CD (T 70 °C, flow rates 0.5, 1.0 and 1.5 m/s), were analyzed. Results: The fruits reached humidities of 17 and 15% for SD and CD. The parameters pH, °Bx, L*, a*, b* were highest with 22°C and CD (1.5 m/s). The value of the carotenoids was higher in fruits stored at 7 ° C and subjected to CD (1.0 and 1.5 m/s) and SD with values of 83.85, 85.98 and 99.43%, respectively. The CD (0.5 m/s) and SD improved lycopene (94.37 and 95.14%) and the antioxidant activity with values of 73.06 and 97.21%. Implications: The application of solar dehydration depends on luminescence condition; however, it is inexpensive and environmentally friendly alternative. Conclusions: The results derived in a viable alternative for the conservation and commercialization of tomato fruits in rural communities

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