scholarly journals Modelling the physico-chemical effect of silver electrorefining as effect of temperature, free acid, silver, copper and lead concentrations

2017 ◽  
Author(s):  
Arif T. Aji ◽  
Taina Kalliomäki ◽  
Benjamin P. Wilson ◽  
Jari Aromaa ◽  
Mari Lundström
Keyword(s):  
Free Acid ◽  
Chemical Effect ◽  
Effect Of Temperature ◽  
Silver Copper ◽  
Physico Chemical

scholarly journals Modelling the effect of temperature and free acid, silver, copper and lead concentrations on silver electrorefining electrolyte conductivity

2016 ◽  
Vol 166 ◽  
pp. 154-159 ◽  
Author(s):  
Arif T. Aji ◽  
Taina Kalliomäki ◽  
Benjamin P. Wilson ◽  
Jari Aromaa ◽  
Mari Lundström
Keyword(s):  
Free Acid ◽  
Effect Of Temperature ◽  
Electrolyte Conductivity ◽  
Silver Copper

Effect of temperature, salinity, heavy metals, ammonium concentration, pH and dissolved oxygen on ammonium removal by an aerobic nitrifier

RSC Advances ◽  
2015 ◽  
Vol 5 (97) ◽  
pp. 79988-79996 ◽  
Author(s):  
Ying Wang ◽  
Hu Chen ◽  
Yu-Xiang Liu ◽  
Rui-Peng Ren ◽  
Yong-Kang Lv
Keyword(s):  
Gene Sequence ◽  
High Salinity ◽  
Alcaligenes Faecalis ◽  
Effect Of Temperature ◽  
Ammonium Concentration ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Physico Chemical ◽  
Gene Sequence Analysis ◽  
Chemical Conditions

An aerobic nitrifier WY-01 was identified asAlcaligenes faecalisby its 16S rRNA gene sequence analysis. It could remove ammonium effectively in varying physico-chemical conditions, such as low temperature, high salinity and high ammonium loads.

The Effect of Hydrothermal Dewatering Temperature on Hydro-Char Obtained from Oily Scum

2019 ◽  
Vol 971 ◽  
pp. 127-133
Author(s):  
Shuang Hui Deng ◽  
Xue Bin Wang ◽  
Dao Yang Ma ◽  
Xu Chao Lu ◽  
Hou Zhang Tan
Keyword(s):  
Particle Size ◽  
Moisture Content ◽  
Surface Characteristics ◽  
Gas Content ◽  
Effect Of Temperature ◽  
Content Increase ◽  
Liquid Content ◽  
Physico Chemical ◽  
Methylene Groups ◽  
Reactor Temperature

Oily scum was treated by hydrothermal dewatering (HTD) under 120-240°C. The changes of surface characteristics and physico-chemical structure of oily scum were investigated and the effect of temperature on the properties of the hydro-char obtained from oily scum was analyzed through different characterization techniques. Results show that the moisture content of HTD treated hydro-char decreases as the temperature increases, which implies that the oily scum can be dewatered and upgraded through HTD method. The morphologies of the HTD pretreated oily scum present less oil content, smaller particle size, and become darker. As the reactor temperature increases from 120 to 240°C during the HTD process, the moisture content of hydro-char obtained decreases from 35.51 to 11.31%, while the liquid content and hydro-char content increase from 58.53 to 79.76% and from 2.50 to 5.29%, respectively, and the released gas content slightly varies in the range of 3.14 - 4.31%. The breaking and gathering effects of the HTD upgrading on oily scum result in a wide particle size distribution of products, which indicates that the overall structure of raw oily scum has been destroyed. With the increase of HTD temperature, the shorten vibration of methylene groups in hydro-char products is weakened.

scholarly journals Effect of Temperature and Slice Size on Avocado Pulp Drying Rate and Oil Yield

2013 ◽  
Vol 34 (2) ◽  
pp. 116-124
Author(s):  
Abraham T. Temu
Keyword(s):  
Moisture Content ◽  
Chemical Properties ◽  
Oil Yield ◽  
Effect Of Temperature ◽  
Drying Rate ◽  
Seed Oils ◽  
Slice Thickness ◽  
Physico Chemical ◽  
Thin Layer Drying ◽  
Drying Models

The effect of temperature and slice thickness on avocado pulp drying rate and oil yield was determined at 50 o C, 60 o C and 70 o C. Pulp slices of 2mm and 5 mm thick were used. The avocado pulp was found to contain 74-75% (wet basis) water, which makes extraction of oil by both chemical and mechanical means difficult. Experimental results showed that oil yield increased with decreasing moisture content reaching a yield of 61% at 10% moisture content. The rate of drying increased with temperature, but decreased with slice thickness. The drying data obtained agreed well with several thin-layer drying models. The models showed that the characteristic drying constant increased linearly with drying temperature and decreased with slice thickness. The Physico-chemical properties of the obtained oil compared favorably with those obtained from other conventional seed oils.

scholarly journals Estimation of The Physico-Chemical Parameters in Marine Environment (Yumurtalik Bight- Iskenderun Bay)

2016 ◽  
Vol 4 (2) ◽  
pp. 97
Author(s):  
Gökhan Tamer Kayaalp ◽  
Oya Işık ◽  
Benin Toklu Alıçlı
Keyword(s):  
Light Intensity ◽  
Analysis Of Variance ◽  
Chemical Properties ◽  
Effect Of Temperature ◽  
Chemical Parameters ◽  
Marine Life ◽  
Multiple Comparison Test ◽  
Physico Chemical ◽  
Iskenderun Bay ◽  
Dissolved O2

The study was carried out to estimate the temperature, light intensity, salinity, Dissolved O2 (DO), pH values and the biotic parameter chlorophyll- a in the water column related with the depth. Because, the physico-chemical parameters affect greatly both primary and secondary producers in marine life. For this purpose the physico-chemical properties were determined day and night for 40 meter depth during the eight days. The means were compared by using the analysis of variance method and Duncan’s Multiple Comparison Test. Also physico-chemical parameters were estimated by using the analysis of regression and correlation. The effect of temperature and salinity were found significant according to the result of the analysis of variance during the day. Also the similar results were found for the night. While the effect of the depth on the chloropyll-a a was significant in the night, the effect of the depth on the DO was not significant in the day and night. The correlations among the depth and the parameters were defined. It was found the negative correlation between the depth and the temperature and light intensity. Determination coefficient of the model for salinity was also found different for day time. The correlation values among the depth and the temperature, salinity and pH were found different for the night.

scholarly journals Effect of Dehydration on Several Physico-Chemical Properties and the Antioxidant Activity of Leeks (Allium porrum L.)

2011 ◽  
Vol 39 (1) ◽  
pp. 144 ◽  
Author(s):  
Mehmet OZGUR ◽  
Arzu AKPINAR-BAYIZIT ◽  
Tulay OZCAN ◽  
Lutfiye YILMAZ-ERSAN
Keyword(s):  
Antioxidant Activity ◽  
Dry Matter ◽  
Chemical Properties ◽  
Effect Of Temperature ◽  
Allium Porrum ◽  
Drying Process ◽  
Hot Air Drying ◽  
Air Drying ◽  
Hot Air ◽  
Physico Chemical

This study investigated the changes in some physico-chemical properties and variations in antioxidant compounds of leeks (cv. ‘Inegol-92’) caused by the drying process. The dry matter and ash contents of the fresh leek samples were 8.06 and 0.58 g 100 g-1, respectively. The pH of the fresh leek samples was 6.02, and the titritable acidity in terms of citric acid was 0.14%. As expected, application of hot-air drying significantly increased the dry matter and ash values due to removal of water from the leek slices. The rehydration ratio of dried leeks at 45°C was 5.41, and the coefficient of rehydration was 0.47. The contents of chlorophyll a and b were higher in the dried leeks than in the fresh leeks. The dehydrated leeks showed a high total color difference (?E=12.53) mainly due to the effect of temperature on heat-sensitive compounds. As expected, both fresh and dried leek samples exhibited antioxidant activity with fresh leeks showing a higher capacity of antioxidant activity. Drying the leeks resulted in some ascorbic acid loss. Fresh leeks had much higher phenolic values (26.33 mg rutin eq 100 g DM-1) than the dehydrated samples. The antioxidant capacity of leeks was decreased by more than 50% during the drying process. Although being the most applied method of thermal dehydration, hot air drying causes the degradation of sensitive components, which results in significant losses in sensorial and physico-chemical properties of the dried products.

scholarly journals Physico–Chemical Interaction between Clay Minerals and Albumin Protein according to the Type of Clay

Minerals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 396 ◽  
Author(s):  
Kim ◽  
Oh
Keyword(s):  
Circular Dichroism ◽  
Fluorescence Quenching ◽  
Conformational Change ◽  
Clay Minerals ◽  
Protein Denaturation ◽  
Chemical Interaction ◽  
Harmful Effect ◽  
Chemical Effect ◽  
Physico Chemical ◽  
Circular Dichroïsm

Clay minerals are widely utilized in pharmaceutical and dermatological sciences as a gastrointestinal medicine or skin remediation agent. In order to verify the feasibility of clays as an injection, pill, or topical agent, it is important to study their interactions with biological components, such as proteins. In this study, we utilized a protein fluorescence quenching assay and circular dichroism spectroscopy to evaluate general aspects of protein denaturation and conformational change, respectively. Three different clays; layered double oxide (LDO), montmorilonite (MMT) and halloysite nanotube (HNT), were treated with albumin and the physico-chemical effect on the protein’s conformation was investigated. MMT was shown to influence the conformational change the most, owing to the large accessible adsorption site. HNT showed meaningful circular dichroism (CD) band collapse as well as fluorescence quenching in the protein, suggesting a potential harmful effect of HNT toward the protein. Among the three tested clays, LDO was determined to affect protein structure the least in terms of three-dimensional conformation and helical structure.

scholarly journals Biochemical Analysis and Physico Chemical Stability of a Partially Purified Lectin from Hilsha Eggs

1970 ◽  
Vol 17 ◽  
pp. 35-40 ◽  
Author(s):  
Imtiaj Hasan ◽  
Syed Rashel Kabir ◽  
Md Ashraful Haque ◽  
Nurul Absar
Keyword(s):  
Biochemical Analysis ◽  
Chelating Agent ◽  
Effect Of Temperature ◽  
Free Sugar ◽  
Chromatographic Technique ◽  
Specific Class ◽  
Physico Chemical ◽  
Nutritional Analysis ◽  
Calcium Phosphorus ◽  
Ph Inactivation

Context: Hilsha is one of the most popular fish in Bangladesh. Biochemical analysis of Hilsha egg revealed that it is quite a healthful food. A specific class of proteins called lectins is partially purified from this source.Objectives: To carry the nutritional analysis of Hilsha eggs and to isolate sugar-specific lectins from the animal source by applying effective purification techniques.Materials and Methods: The moisture, ash, protein, lipid, polysaccharide, free sugar, cholesterol, calcium, phosphorus and iron contents were determined by the conventional methods and the lectins were isolated by using the affinity chromatographic technique. The effect of temperature, pH and metal ions were observed by performing the hemagglutination assay.Results: The moisture, ash, protein, lipid, polysaccharide, free sugar, cholesterol, calcium, phosphorus and iron contents were 34-, 2.4-, 32.59-, 28.35-, 0.036-, 0.059-, 0.40-, 0.178-, 0.193- and 0.136%, respectively. The partially purified crude protein by affinity chromatography from Hilsha eggs agglutinated rabbit erythrocytes and the hemagglutinating activity is inhibited by 25mM Raffinose followed by 100 mM of glucose, N-acetyl-D-glucosamine, N-acetyl-D-galactosamine and D-galactosamine-HCl each. In the presence of the chelating agent EDTA, the lectin lost its activity completely. Thermal and pH inactivation assay of the lectin indicates that the activity is highest at 30 to 40°C and at the pH 5 to 9, respectively. Conclusion: Hilsha fish eggs can be recommended as a nutritious food and as well as can be regarded as a source of animal lectins, a group of sugar-binding proteins.Key words: Nutritional analysis; Hemagglutination assay; Temperature; pH; Tenualosa ilisha.DOI: 10.3329/jbs.v17i0.7097J. bio-sci. 17: 35-40, 2009

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