ABNT NBR 6401 PDF

Malalrajas ABSTRACT This study aimed to quantify the tannic content of the barks and fruit of angico-vermelho, jurema-preta and acacia-negra using skin powder as detanizador agent. Considering that the tannic portion of the analytical solution was retained in the skin powder, it was calculated using the same Equation 6. Experimental design and data analysis The experiment included particle mixtures for all individuals of the same species and parts bark agnt fruit. The soluble solids correspond to a fraction of the total solids, and the other portion corresponds to the insoluble solid difference between total solids and water soluble solids. Few studies have been realized to investigate the occurrence of species in the Caatinga, particularly studies seeking to extract and quantify tannins in species, which present potential for commercial exploitation for this purpose Paes et al.

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Malalrajas ABSTRACT This study aimed to quantify the tannic content of the barks and fruit of angico-vermelho, jurema-preta and acacia-negra using skin powder as detanizador agent. Considering that the tannic portion of the analytical solution was retained in the skin powder, it was calculated using the same Equation 6.

Experimental design and data analysis The experiment included particle mixtures for all individuals of the same species and parts bark agnt fruit. The soluble solids correspond to a fraction of the total solids, and the other portion corresponds to the insoluble solid difference between total solids and water soluble solids. Few studies have been realized to investigate the occurrence of species in the Caatinga, particularly studies seeking to extract and quantify tannins in species, which present potential for commercial exploitation for this purpose Paes et al.

In this sense, research into alternative raw materials to obtain tannins is important, since such studies in the Caatinga have demonstrated the richness in tannins in some species found in the region Paes et al.

The total solids content be understood as the total of the powdered extract. Tannic agents may be hbr as natural, synthetic or mineral substances capable of transforming skin into leather, which occurs due to chemical bonds between the collagen of the skin and polyphenols Panshin et al, ; Haslam, Food Chemistry ; In press. However, commercial skin powder qbnt not used due to the difficulty of obtaining it and its high cost. Pr jeto da inst lacoes Pa Pa Br seguinte: After initial stirring with a glass rod, the mixture was left to stand for 24 h.

The solution was evaluated using four treatments: The particles were stored in numbered and sealed bottles, protected from light and humidity. About ml of crude analytical solution, after filtering through fabric and porosity crucible 2, was subjected to filtering using medium filtration white band filter paper. Angico vermelho presented potential similar to acacia negra, a global standard in the leather tanning industry. A third rate of ml was pipetted into the analytical solution, filtered and subsequently deposited into a container containing 10 g of chrome skin powder.

Angico vermelho bark stood out due to its higher soluble solids values abnf Generation of analytical solution Applied Spectroscopy ; 69 Mean comparisons are presented in Table 2. Download Nbr The extraction to obtain ml of analytical solution followed. Firstly, they were submitted to a hammer mill, then to grinding in a Wiley mill, thereby producing a material with a smaller particle size. Non-tannic soluble solids SSnT were then calculated using Equation abmt. Measurement of Tannic Substances in Forest Species Finally, the skin powder was stored in identified and tightly sealed containers, protected from light and humidity.

The Academic Press; This amount is undesirable since a lower value for this parameter is preferable. Cerne a; 12 3: Lobby, Restaurantes bares, dlversao als e c 4,8 1,1 5,7 1,4 1,1 5,7 1,4 1,1 5,7 1,4 1,1 5,7 1,4 0,4 15,0 0,5 1,1 5,7 1,4 AB To — With regard to jurema, in a study by Paes et al.

Three replicates were evaluated extractions per treatment and all sub-replicates moisture content, total solids, total soluble solids, soluble solids tannic etc. Lis ventilacao muit Co freqClentement menor 0, verificada no ar exterior pela respiracao pela pessoas.

This was not observed with the other materials tested. The variability in tannin chemical composition for each species and plant organ analyzed should be taken into account, which may influence its usefulness. Given that this value refers to the mass of material in the leaching process, this value was subtracted from the anbt in the treatments.

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