scholarly journals Study of protein extraction from residues of tambatinga amazon fish

2020 ◽  
Vol 42 ◽  
pp. e10
Author(s):  
Sumária Sousa e Silva ◽  
Danieli Alini Pettenon ◽  
José Wilson Pires Carvalho ◽  
Sumaya Ferreira Guedes ◽  
Raquel Aparecida Loss
Keyword(s):  
Acetic Acid ◽  
Hydrochloric Acid ◽  
Sodium Hydroxide ◽  
Protein Extraction ◽  
Physicochemical Characterization ◽  
Waste Utilization ◽  
Moisture Determination ◽  
Forced Circulation ◽  
Fish Waste ◽  
Powder Samples

The present work aimed to extract proteins from tambatinga fish residue with physicochemical characterization, a hybrid of the crossing between the female tambaqui (Colossoma macropomum) and the male pirapitinga (Piaractus brachypomus). Protein extraction was performed by the following methods: acid (hydrochloric acid, acetic acid) and basic (sodium hydroxide). The protein fraction was characterized in relation to moisture content, ash, protein and yield. The moisture determination was performed with powder samples, submitted to drying at 40 ° C, in a forced circulation oven, which presented values of 7.29; 11.42 and 3.14% respectively. Regarding the fixed mineral residue (ash), the samples differed from each other, with values between 81.52; 50.65 and 44.76%. The samples obtained by the different processes presented protein contents of 3.63; 9.36 and 39.55% respectively. And the yield of protein extraction was 8.96; 3.64 and 6.43% for hydrochloric acid, acetic acid and sodium hydroxide, respectively. The obtained results indicate that it is possible to perform protein extraction for fish waste utilization, mainly by the basic extraction method.

Organic sulfur compounds. VII. Some reactions of benzothiazine hydroxamic acids

1970 ◽  
Vol 48 (23) ◽  
pp. 3727-3732 ◽  
Author(s):  
R. T. Coutts ◽  
Sharon J. Matthias ◽  
E. Mah ◽  
N. J. Pound
Keyword(s):  
Acetic Acid ◽  
Hydrochloric Acid ◽  
Sodium Hydroxide ◽  
Unsaturated Acid ◽  
Hydroxamic Acids ◽  
Sulfur Compounds ◽  
The Other ◽  
Complex Reaction ◽  
Organic Sulfur Compounds ◽  
Derivatives Of

Treatment of (3,4-dihydro-4-hydroxy-3-oxo-2H-1,4-benzothiazin-2-yl)acetic acid (1a) with sodium hydroxide yields the corresponding lactam, i.e. (3,4-dihydro-3-oxo-2H-1,4-benzothiazin-2-yl)acetic acid, together with the α,β-unsaturated acid, 3,4-dihydro-3-oxo-2H-1,4-benzothiazine-Δ2,α-acetic acid. The 6-methyl- and 6-bromo-derivatives of 1a behaved similarly when reacted with sodium hydroxide but when 3,4-dihydro-4-hydroxy-3-oxo-2H-1,4-benzothiazine was so treated a more complex reaction occurred.Methyl (6-bromo-3,4-dihydro-4-hydroxy-3-oxo-2H-1,4-benzothiazin-2-yl)acetate was also treated with hydrochloric acid. The two products isolated were (6-bromo-3,4-dihydro-3-oxo-2H-1,4-benzothiazin-2-yl)acetic acid and (6-bromo-7-chloro-3,4-dihydro-3-oxo-2H-1,4-benzothiazin-2-yl)acetic acid.The action of hydrochloric acid on 3,4-dihydro-4-hydroxy-7-methyl-3-oxo-2H-1,4-benzothiazine also gave two products. One was the corresponding lactam; the other was unexpected and has been tentatively identified as bis[2-(3,4-dihydro-7-methyl-3-oxo-2H-1,4-benzothiazine].

Wet-Etching Characteristics of SiCN Films Deposited by HWCVD Method

2012 ◽  
Vol 81 ◽  
pp. 34-38
Author(s):  
H. Nakanishi ◽  
T. Ogata ◽  
Y. Kadotani ◽  
Akira Izumi
Keyword(s):  
Acetic Acid ◽  
Sulfuric Acid ◽  
Sodium Chloride ◽  
Hydrochloric Acid ◽  
Phosphoric Acid ◽  
Sodium Hydroxide ◽  
Potassium Hydroxide ◽  
Wet Etching ◽  
Chemical Agents ◽  
Acid Etch

We investigated the wet-etching properties of SiCN films using chemical agents. Our results show that sodium hydroxide, potassium hydroxide and phosphoric acid etch SiCN films, while hydrochloric acid, sulfuric acid, acetic acid, ammonium chloride and sodium chloride cannot etch SiCN films.

Combined Effects of pH and Temperature on Listeriolysin O Production by Listeria monocytogenes SLCC 5764

1996 ◽  
Vol 59 (10) ◽  
pp. 1076-1078 ◽  
Author(s):  
LISA S. SCHILLING ◽  
SCOTT E. MARTIN
Keyword(s):  
Acetic Acid ◽  
Listeria Monocytogenes ◽  
Hydrochloric Acid ◽  
Sodium Hydroxide ◽  
Combined Effects ◽  
Listeriolysin O ◽  
Effects Of Ph ◽  
Acidic Conditions ◽  
Effects Of Temperature

Listeria monocytogenes SLCC 5764 was propagated at 4, 25, or 37°C in tryptic soy broth (TSB) acidified with either acetic acid at pH 5.2, 5.7, or 7.0, or hydrochloric acid at pH 5.0, 5.7, or 7.0; or made alkaline with sodium hydroxide at pH 7.5, 8.5, or 9.5. These studies were undertaken to determine the combined effects of temperature and pH on the production of listeriolysin O (LLO). The LLO activity was greatest after the cells were propagated in TSB acidified by either acid to pH 7.0 at 37°C. Very little LLO activity was detected for cells propagated at 4° under acidic conditions. There were no significant differences found between the LLO produced in media acidified with either acid. The LLO activity was highest after the cells were propagated in media at pH 7.5 at 37°C.

Phospholipase C Production of Listeria monocytogenes SLCC 5764 Cultured with Various Salt Concentrations, pHs, and Temperatures

1996 ◽  
Vol 59 (5) ◽  
pp. 472-475
Author(s):  
LISA S. SCHILLING ◽  
LINDA M. MILO ◽  
SCOTT E. MARTIN
Keyword(s):  
Acetic Acid ◽  
Listeria Monocytogenes ◽  
Hydrochloric Acid ◽  
Sodium Hydroxide ◽  
Phospholipase C ◽  
Growth Temperature ◽  
Alkaline Media ◽  
Growth Environment

Listeria monocytogenes SLCC 5764 was propagated at 4, 25, or 37°C in tryptic soy broth (TSB) containing 428, 787, or 1,112 mM NaCl; or adjusted with either acetic acid to pH 5.2, 5.7, or 7.0 or hydrochloric acid to pH 5.0, 5.7, or 7.0; or made alkaline with sodium hydroxide to pH 7.5, 8.5, or 9.5, to determine the effects on the production of phospholipase C (PLC). Altering the growth environment caused alterations in PLC production. The PLC activity was highest after cells were propagated in TSB containing 428 mM NaCl at each growth temperature. Little PLC activity was detected at 4 or 25°C in media with the lowest and highest salt concentrations. Similarly, little PLC activity was detected at 4 or 37°C at each pH from cells grown in media adjusted with either acid. The PLC activity was greater after the cells were grown in media adjusted with either acid at pH 7.0 at 25°C. For growth in alkaline media, the PLC activity was highest after the cells were propagated in media at pH 7.5 at each growth temperature.

Interlaboratory comparison of results of erythrocyte protoporphyrin analysis.

1978 ◽  
Vol 24 (12) ◽  
pp. 2135-2138 ◽  
Author(s):  
K W Jackson
Keyword(s):  
Acetic Acid ◽  
Hydrochloric Acid ◽  
Ethyl Acetate ◽  
Disease Control ◽  
Whole Blood ◽  
Interlaboratory Comparison ◽  
Direct Reading ◽  
Blood Samples ◽  
Erythrocyte Protoporphyrin ◽  
Whole Blood Samples

Abstract Each of 65 laboratories analyzed 10 whole-blood samples for erythrocyte protoporphyrin by one or more of several analytical procedures. These procedures were of two types: (a) extraction of protoporphyrin from the erythrocytes into ethyl acetate/acetic acid, re-extraction into hydrochloric acid, and fluorometric measurement; or (b) direct reading in a portable fluorometer (hematofluorometer), with no pretreatment of the blood sample. Interlaboratory correlation was generally poor, especially between laboratories using extraction procedures. Hematofluorometric results intercorrelated better, but they had a low bias as compared to the extraction approach. Nationwide standardization of the test is required to assure satisfactory interlaboratory performance and to identify laboratories whose results are sufficiently accurate to be used for interpretations according to guidelines set forth by the Center for Disease Control for erythrocyte protoporphyrin testing.

scholarly journals Kinetics of Substituted Bis- and Mono-azo Dyes as Corrosion Inhibitors for Aluminium in Hydrochloric Acid and Sodium Hydroxide Solutions

1999 ◽  
Vol 23 (7) ◽  
pp. 408-409
Author(s):  
Loutfy H. Madkour ◽  
R. M. Issa ◽  
I. M. El-Ghrabawy
Keyword(s):  
Hydrochloric Acid ◽  
Sodium Hydroxide ◽  
Azo Dyes ◽  
Thermodynamic Model ◽  
Corrosion Inhibitors ◽  
Kinetics Of ◽  
Alkaline Corrosion

This investigation is designed to apply an advanced kinetic–thermodynamic model on the data obtained from acidic and alkaline corrosion of aluminium using bis- and mono-azo dyes as corrosion inhibitors.

Production of monosaccharides from poplar by a two-step hydrogen peroxide-acetic acid and sodium hydroxide pretreatment

2021 ◽  
Vol 170 ◽  
pp. 113820
Author(s):  
Hong Liao ◽  
Jiaxin You ◽  
Peiyao Wen ◽  
Wenjun Ying ◽  
Qianqian Yang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Sodium Hydroxide

scholarly journals Kinetics and Mechanism of the Change of the 4-Nitrobenzylthio-System into 4,4′-Diformylazoxybenzene in Alkaline Dioxane-Water Media

1985 ◽  
Vol 40 (11) ◽  
pp. 1128-1132
Author(s):  
Y. Riad ◽  
Adel N. Asaad ◽  
G.-A. S. Gohar ◽  
A. A. Abdallah
Keyword(s):  
Acetic Acid ◽  
Sodium Hydroxide ◽  
Rate Constants ◽  
Main Product ◽  
Reaction Medium ◽  
Aqueous Dioxane ◽  
Proton Abstraction ◽  
First Order ◽  
Water Media ◽  
Different Temperatures

Sodium hydroxide reacts with α -(4-nitrobenzylthio)-acetic acid in aqueous-dioxane media to give 4,4'-diformylazoxybenzene as the main product besides 4,4'-dicarboxyazoxybenzene and a nitrone acid. This reaction was kinetically studied in presence of excess of alkali in different dioxane-water media at different temperatures. It started by a fast reversible a-proton abstraction step followed by two consecutive irreversible first-order steps forming two intermediates (α -hydroxy, 4-nitrosobenzylthio)-acetic acid and 4-nitrosobenzaldehyde. The latter underwent a Cannizzaro's reaction, the products of which changed in the reaction medium into 4,4'-diformylazoxybenzene and 4,4'-dicarboxyazoxybenzene. The rate constants and the thermodynamic parameters of the two consecutive steps were calculated and discussed. A mechanism was put forward for the formation of the nitrone acid.Other six 4-nitrobenzyl, aryl sulphides were qualitatively studied and they gave mainly 4,4'-diformylazoxybenzene beside 4,4'-dicarboxyazoxybenzene or its corresponding azo acid.

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