Biuret Reaction Research Articles

Biotechnological methods for separation of pigs pancreas glands protein substances with membrane technologies

The pancreas gland (PG) is a secondary product of livestock processing; it contains a wide range of biologically active compounds. The purpose of this article is to analyze the efficiency of technological approaches for pancreas gland extraction with the help of trehalose and a glycine-proline mixture aimed for recovery and separation of the gland’s protein-peptide compounds. The extraction was conducted with 0.9% NaCl, 0.9% NaCl, with addition of 0.5 M trehalose (0.9% NaCl-0.5 M trehalose) and 0.9% NaCl with addition of 1% glycine and 0.1 M L-proline (0.9% NaCl-1% Gly-0.1M Pro), the ratio of pancreas gland to extractant was equal to 1:5. The concentration of the protein in the supernatants after their extraction was measured by the biuret reaction in a semi-automatic biochemical analyzer Biochem SA. The proteomic composition of the extracts and the native pancreas gland was assessed by one-dimensional Laemmli electrophoresis in a 12.5% polyacrylamide gel and by two-dimensional O’Farrell electrophoresis. When determining the intensity of the protein fractions, it was noted that the methodology of separation of protein-peptide mixtures extracted from the pigs pancreas gland with the extractant 0.9% NaCl-1% Gly-0.1M Pro, ensured the higher extraction of the proteins in comparison with the method of 0.9% NaCl-0.5 M trehalose. Notwithstanding the fact that application of amino acids (glycine and proline) mixture provided for a greater yield of proteins from the extract into the diafiltrate, the experiments in vitro showed that the diafiltrate obtained though trehalose featured higher activity. This may be explained by the fact that after dialysis removal of trehalose from the protein fraction with a molecular weight of less than 50 kDa, its residual quantities were still sufficient to prevent proteins aggregation and, as a consequence, the biological activity of the extracted proteins was preserved, while in the diafiltrate obtained through amino acids mixture where numerous protein aggregates were detected by 2-DE. This study allowed testing the biotechnological methodics on pig pancreatic tissues aimed to intensifying the extraction and separation of protein compounds. The results of the study are important for development of methodological approaches to obtaining the targeted substances for their further utilizing for various purposes.

Influence of pH on protein extraction from Sus scrofa pancreas

The porcine pancreas contains various enzymes, structural, regulatory, secretory, receptor and other biologically active substances that ensure both the functioning of the organ and its biological role in the organism. The aim of this work was to study the influence of pH changes in 0.9% sodium chloride solution used as an extractant on the efficiency of bioactive protein isolation from the porcine pancreas. The extraction was carried out with the 0.9% NaCl, 0.9% NaCl pH=4 and 0.9% NaCl pH= 8.5 with a stirring speed of 400 rpm for 150 min at 4 ºC; the ratio of pancreas: extractant was 1:5, the supernatant was separated by centrifugation. The protein concentration was measured by a biuret reaction on a semi-automatic biochemical analyzer Biochem SA. The proteomic composition of extracts and native pancreas was evaluated by 10% SDS-PAGE according to Laemmli method in the “VE10” chamber. Digital images of electrophoregrams were obtained using a Bio-5000 Plus scanner, edited in a graphic editor and analyzed using ImageJ software. When determining the intensity of protein fractions, it was noted that the use of 0.9% NaCl contributed to a greater yield of proteins with molecular weights of 200 kDa, 150 kDa, 69 kDa, 52 kDa and 33 kDa into the extractant; a pH shift to the acidic area stimulated the yield of fractions with molecular weights of 130 kDa, 50 kDa, 49 kDa, 45 kDa, 40 kDa, 30 kDa and 27kDa, and a pH shift to the alkaline area — only 47 kDa and 42 kDa. Most pancreas proteolytic enzymes have a molecular weight in a range of 34–23kDa, excepting the immature form of carboxypeptidases with MW 45–47kDa. The greatest intensity of protein bands was observed in the region with MW less than 33kDa on the obtained electrophoregrams. The presence of intense protein fractions in the region of molecular weights of less than 50–52kDa and 40kDa was also noted, which may correspond to enzymes such as pancreatic lipase and phospholipase A2, and the presence of protein fractions with MW above 130 kDa corresponding to various types and isoforms of collagen and laminin. In addition, such processes as protein aggregation and proteolysis can also influence the molecular weight distribution of protein fractions.

Antiangiogenic Activity of Pineapple (Ananas comosus) Stem Extract on Chicken Embryo’s Chorioallantois Membrane (CAM)

Inhibition of angiogenesis is able to suppress cancer growth by starving the cancer cells. It has been reported that the growth of human tongue squamous cell carcinoma can be inhibited by administering pineapple’s (Ananas comosus) extract. However, antiangiogenic activity of this extract has not been studied yet. This study aimed to investigate antiangiogenic activity of pineapple’s stem extract on chorioallantoic membrane (CAM) of chicken embryo. Pineapple stems were extracted by ultrasonic-assisted method using ethanol 96%. The chemical compositions were determined by thin layer chromatography (TLC) and the protein concentration was analysed by the biuret method. In-ovo antiangiogenics assay was performed on CAM induced by basic fibroblast growth factor (bFGF). The extract at concentrations of 0.6%, 0.9% and 1.2% were administered on days 9-14 of egg incubation. We counted the number of CAM vasculatures using a stereomicroscope and examined the embryonic blood smears-stained May-Grunwald to investigate the extract-induced inflammation. Pineapple extract contained saponin by TLC and 1.93 mg/ml protein by the biuret test. The vasculatures were significantly reduced by all concentrations of the extract. At a concentration of 1.2%, the extract did not induce notable inflammation in chicken embryos. In conclusion, pineapple stems extract shows antiangiogenics activity on CAM.

Understanding hypergammaglobulinemia in experimental or natural visceral leishmaniasis.

Nonspecific hypergammaglobulinemia (HGG) occurs in symptomatic human visceral leishmaniasis (VL) caused by L. L. infantum. This study assessed this finding in experimental infection in hamsters and natural infection in dogs. The serum concentration of proteins, albumin and globulins was determined through the biuret and bromocresol green reaction, where the HGG was better expressed through the albumin/globulin (A/G) ratio. HGG was associated with a higher concentration of specific anti-glycan antibodies (BSA-G)/promastigote soluble extract (PSE) and the presence of circulating immune complexes (IC) by dissociative enzyme-linked immunoassay (ELISA). The study found monovalent IC in 37.9% (PSE) and 50% (BSA-G) of sera from infected hamsters, with increased frequency as the disease progressed. HGG was found in >60% of the samples in dogs with VL, associated with higher levels of specific immunoglobulin (Ig)A and IgM, but not IgG, determined using the PSE and BSA-G ELISA. HGG was associated with the presence of monovalent IC in 58.9% (PSE) and 63.4% (BSA-G) positive dog samples. HGG may result not only from the nonspecific activation of B cells, with greater production of specific and nonspecific antibodies, but also due to lower IgG excretion due to the presence of soluble monovalent IC. HGG correlates to the progression of VL and may be a marker for manifested disease.

Extraction and Characterization of Keratin Protein from Chicken Feathers using Alkaline Hydrolysis Method: Effects of Sodium Sulphide Concentration and Shelf-life Evaluation

This study investigated the extraction of keratin protein from chicken feathers through alkaline hydrolysis using sodium sulphide as a digesting agent. The protein was precipitated using hydrogen chloride and confirmed through biuret test, solubility test, sulfur test, and FTIR analysis. The effect of varying sodium sulphide concentrations (0.5 M, 0.75 M, and 1 M) on the extracted keratin was evaluated. Results showed that a higher concentration of sodium sulphide produced a higher yield of keratin, with 1 M producing 65.8% yield. However, the shelf-life of wet keratin extracted using 1 M concentration was four weeks, compared to six weeks for 0.5 M and 0.75 M concentrations. The dried keratin was unaffected after six weeks. The study suggests that a higher concentration of the reducing agent produced a higher yield of keratin protein but with a shorter shelf-life if drying was not carried out. The utilization of abundant waste generated by poultry industries is crucial in reducing pollution and creating opportunities for valuable product development. The extraction of keratin from chicken feathers provides an eco-friendly approach to waste management and creates opportunities for product development.

Test Carbohydrate and Protein Content in Commercial Condensed Milk (SKM) Qualitative and Quantitative

Sweetened condensed milk (SKM) is a milk product obtained by evaporating some of the water from pure milk with the addition of sugar. SKM is not a sterile product, but its preservation depends on the sugar content; (1) Background: Qualitative and quantitative tests of carbohydrates and proteins were carried out to determine the presence of carbohydrates and proteins in SKM. The qualitative test is based on a change in color or precipitate formed, while the quantitative test is to determine carbohydrate and protein levels; (2) Method: Qualitative and quantitative test of carbohydrates with the DNS method. Qualitative and quantitative test of protein with the Lowry method; (3) Results: Qualitative analysis of carbohydrates Molisch test on SKM "A", "B", "C", "D", "F" is positive, while SKM "E" is negative. The Osazon test on SKM "A", "B", "C", "D", "F" is positive and SKM "E" is negative. Iodine test, Benedict's test, Barfoed's test, Seliwanoff's test showed positive. Quantitative test for carbohydrates, sample concentration SKM "A" 0.228mg/mL the lowest value and SKM "F" 1.544mg/mL the highest value. Biuret test protein qualitative analysis on SKM "A", "B", "C" is positive while SKM "D", "E", "F" is negative. The Ninhydrin test on SKM "D", "F" is positive while SKM "A", "B", "C", "E" is negative. Sulfur test on SKM "A", "B" is positive while SKM "C", "D", "E", "F" is negative. Xantoprotein test on SKM "A", "C", "D", "E", "F" was positive while SKM "B" was negative. The Neuman test on SKM "D", "E", "F" is positive while SKM "A", "B", "C" is negative. Quantitative protein test for SKM“B” concentration was 10.77mg/mL, the lowest value, and the SKM “D” sample was 90.11mg/mL, the highest value; and (4) Conclusion: The qualitative analysis of carbohydrates SKM "A", "B", "C", "D", "F" showed positive and the quantitative test of SKM "F" contained high carbohydrates. Whereas SKM "A", "D", "F" showed positive protein and the SKM "D" quantitative test contained high protein.

AN EVALUATION OF PHYSICOCHEMICAL PARAMETERS AND QUANTITATIVE PHYTOCHEMICAL ANALYSIS OF DATURA METEL- A RESEARCH ARTICLE

Datura is known as a medicinal plant and plant hallucinogen all over the world. Datura is a rich source of alkaloids such as Hyoscyamine, hyoscine, scopolamine, atropine, with anolides (lactones) and other tropanes. Based on the presence of alkaloids, formulations containing Datura exhibit antibacterial, antioxidant, herbicidal, antifungal, antiviral and antiulcer properties. Historically, Datura has been employed in the treatment of skin disorders, ear pain, cough, fever, and asthma, among other traditional uses. Qualitative phytochemical test indicates the identification of primary metabolites (Carbohydrate, protein, fat etc.) and secondary metabolites (alkaloids, glycosides tannin etc.). Aim- Physicochemical parameters and quantitative phytochemical analysis of Datura metel. Material & Method- The powdered form of Datura seeds was prepared, and its physicochemical or phytochemical testing & standardization were conducted in accordance with established protocols. Results- Datura was evaluated for different standardization parameters which showed Loss on drying (7.36%), Total ash (7.26%), Acid insoluble ash (3.65%), Water soluble extractive (17.65%), Alcohol soluble extractive (12.25%) and Water-soluble ash (5.19%). Molisch test was positive in aqueous extract. Benedict test was positive in alcoholic extract. Fehling test was positive in aqueous extract. Alkaloids were identified in aqueous extract due to positive of Dragondroff test, Wagner’s test, and Hager’s test positive in aqueous extract. Amino acid was present in aqueous extract due to show positive result in Ninhydrine test. Proteins were present in test sample due to positive in Biuret test and Xenthoprotic test in aqueous extract. Foam test was positive in aqueous extract. Borntroger’s test positive in aqueous extract. Phenolic test was positive in aqueous and alcoholic extract. FeCl3 test, Pot. Dichromate test was positive in extract of seeds that’s indicate that tannin is present in sample. Conclusion- This paper highlights organoleptic characters and constituents of Datura metel and the data obtained from this study can be utilized to establish standards for Datura metel.

Extraction of Chitosan from <i>L. squarrosulus</i> (Mushroom) and <i>C. africana</i> (Shrimp) Based and Production of Film Polymer

The deacetylated form of chitin presents enormous areas of application. The research work was aimed at the production of polymer film by the extraction of chitosan from Lentinus squarrosulus (mushroom) and Caridina africana (shrimp) using a chemical process involving deproteinisation, demineralisation, and deacetylation. The two samples were thoroughly washed with distilled water to remove impurities, then dried at room temperature for three days. The mushroom was grounded to powder, deproteinised at varying concentrations (1, 2, 3, and 4 M) and temperatures (60, 80, and 100 °C). The emanating products were now demineralised and deacetylated at 3 M and 60 °C. Biuret test analysis was carried out on 3 M, 60 °C and 4 M, 100 °C of L. squarrosulus chitosan and C. africana with the later showing a clearer positive result for the application. The physicochemical and mechanical properties of chitosan composite films of C. africana and gelatinous composition (CS30: G70, CS50: G50, and CS70: G30) plasticised with glycerol were studied. The chitosan composite films, L. squarrosulus (3 M, 60 °C), and C. africana were characterised by FT-IR. The FTIR spectra showed the functional groups associated with the various bands, intensities, and stretching established that the samples were chitosan. The results of the flexibility and refractive index analysis indicated that the higher chitosan films were more flexible and refractive, finding a much greater application in the manufacture of lenses of higher magnification. The FTIR spectra of the compact films of the homogeneous structure showed that there was a reaction in C. africana chitosan. The SEM analysis of chitosan in C. africana showed morphological differences of ×300, ×500, ×1000, and ×1500.

Control of sesame bacterial leaf spot with copper fungicides

In recent years, Mie Prefecture has been working to establish a domestic production area for sesame (Sesamum indicum L.), and the cultivation area has been increasing. Meanwhile, there is a wide incidence of sesame bacterial leaf spot (caused by Pseudomonas syringae pv. sesami Young, Dye & Wilkie, Acidovorax valerianellae Gardan, Stead, Dauga & Gillis, and Xanthomonas sp.), contributing to yield loss. No pesticides against the disease are currently registered in Japan, and no control measures have been established. We evaluated three copper fungicides (basic copper sulfate, sodium bicarbonate/anhydrous copper sulfate, and basic copper chloride/sulfur) in pot and field tests. Our results demonstrated that all fungicides could suppress the disease when applied before its onset or in its early stage.

Optimization of Keratin Hydrolysate Extraction from Tannery Sheep Hair Waste

Tannery hair wastes are becoming a challenge for tanners regarding environmental pollution control and human health. In this study, an experiment had been designed to hydrolyse sheep hair in an alkaline medium, and the operational condition for the alkaline extraction of KH has been modeled and optimized. The structure, morphology, functional groups, particle size, and molecular mass of the KH extracts were evaluated experimentally by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), particle size analysis, and SDS-PAGE analysis, respectively. FTIR analysis of the extract confirmed the presence of carboxylic, amide, and aldehyde functional groups and alkyl side chains of amino acids. The molecular weight of the extracted keratin ranges between 3–15 kDa, and X-ray diffraction (XRD) analysis showed an amorphous form of structure with two peaks at 2 theta of 9.36° and 21.16° due to α -helix and β - sheet structure in keratin. Response surface methodology (RSM) coupled with BOX-Behnken design was applied as a statistical tool to investigate the effect of extraction time, the concentration of the hydrolysing agent, and temperature on the response variable (yield of keratin protein). The concentration of the hydrolysing agent was found to be the most significant factor affecting the speed of extraction, but its gradual increase tends to affect the protein content of the extract. Optimum parameters of 0.5 N, 80°C, and 3.5 hr were obtained for the concentration of NaOH, temperature, and extraction time, respectively, with a maximum average protein yield of 91.5% and a percentage total nitrogen content of 14.6% using the Kjeldahl method and 86.57% using the biuret test method.

A SIMPLE SPECTROPHOTOMETRIC METHOD FOR QUANTIFICATION OF CASEIN IN MILK AND MILK PRODUCTS

In the food industry, production processes and food products are subjected to the highest possible quality control requirements. In order to safeguard the quality of a certain product along the production chain, it is important to know its composition. This, for instance, especially applies to a natural product like milk and its further processing in order to efficiently control the production of cheese and quark. Milk contains an important natural protein that is responsible for the essential curdling process during the production of cheese: casein. Casein protein provides the body with all the amino acids necessary to help build muscle. Casein protein is digested more slowly than other proteins, so it might be better at reducing appetite and increasing feeling of fullness. Effective control of the production processes of dairy products only becomes possible when the casein concentration is known. In this experiment casein content in milk and curd samples was determined at 524.5nm in visible range against biuret reagent by using simple uv-visible spectrophotometer. The curd and milk samples were collected from the local market. For quantitative determination of casein in milk and curd, classic protein analysis method was used i.e. biuret method. This method is based on biuret reaction in which colored copper based complex was formed. The casein protein concentration in curd sample was found to be 1684ppm. The concentration in milk sample 1 was found to be 2893ppm and in milk sample 2 was found to be 1522ppm.

Comparison of refractometer and biuret reaction as measurement methods for serum total protein concentration in Warmblood foals

Comparison of refractometer and biuret reaction as measurement methods for serum total protein concentration in Warmblood foals

Biotechnological techniques for intensification of protein extraction from the porcine pancreas

Processing of secondary products after slaughter of farm animals is in demand. The pancreas is a rich source of bioactive protein substances, effective extraction of which is a serious problem today due to their aggregation. The aim of the work was to assess the extractivity of protein substances of the porcine pancreas using sodium chloride, trehalose, arginine, and combination of glycine and proline. The protein concentration was determined in the obtained extracts by the biuret reaction and their protein composition was assessed by densitometry of two-dimensional electropherograms using software ImageMaster™ 2D Platinum powered by Melanie 8.0. The results showed a positive effect of anti-aggregation agents on the release of protein substances into a solution. The highest protein concentration (33.36±0.64 g/l) was observed when adding 1М L-arginine; however, it was conditioned mainly by an increase in the content of three major protein fractions rather than by diversity of the protein composition. In general, the use of 0.9% NaCl as an extractive agent was quite effective, but selectivity to certain protein groups was observed for anti-aggregation agents such as sodium chloride, trehalose, arginine, glycine and proline, as well as their combination. The obtained results are important for intensifying extraction of protein substances including target ones with the subsequent application in different fields.

Milk-Derived Carbon Quantum Dots: Study of Biological and Chemical Properties Provides Evidence of Toxicity.

Carbon dots (CDs) are carbon-based zero-dimensional nanomaterials that can be prepared from a number of organic precursors. In this research, they are prepared using fat-free UHT cow milk through the hydrothermal method. FTIR analysis shows C=O and C-H bond presence, as well as nitrogen-based bond like C-N, C=N and -NH2 presence in CDs, while the absorption spectra show the absorption band at 280 ± 3 nm. Next, the Biuret test was performed, with the results showing no presence of unreacted proteins in CDs. It can be said that all proteins are converted in CDs. Photo luminance spectra shows the emission of CDs is 420 nm and a toxicity study of CDs was performed. The Presto Blue method was used to test the toxicity of CDs for murine hippocampal cells. CDs at a concentration of 4 mg/mL were hazardous independent of synthesis time, while the toxicity was higher for lower synthesis times of 1 and 2 h. When the concentration is reduced in 1 and 2 h synthesized CDs, the cytotoxic effect also decreases significantly, ensuring a survival rate of 60-80%. However, when the synthesis time of CDs is increased, the cytotoxic effect decreases to a lesser extent. The CDs with the highest synthesis time of 8 h do not show a cytotoxic effect above 60%. The cytotoxicity study shows that CDs may have a concentration and time-dependent cytotoxic effect, reducing the number of viable cells by 40%.

Control efficacy of a basic copper sulfate flowable formulation for bacterial shoot blight on tea plant

Control efficacy of a basic copper sulfate flowable formulation for bacterial shoot blight on tea plant

The genetic diversity and variation in crude protein content of wheat (Triticum aestivum L.) promising cultivars for breeding in Albania

The genetic diversity and variation in crude protein content among eleven wheat genotypes, comprising three elite local genotypes and eight wheat genotypes of foreign origin were investigated in the present study. Variability was evidenced in grain protein content estimated by biuret test, it ranged from 9.5 to 13.9% with mean of 11.58%. Comparative analysis between local and introduced wheat genotypes revealed that the local genotypes had lower protein content than those of foreign origin. Fourteen polymorphic RAPD markers were used to assess genetic diversity among selected wheat varieties. The mean similarity among wheat genotypes was 67%. Genetic similarity among local wheat varieties was higher (83%) than among those of foreign origin (66%). The wheat genotypes were grouped into two main clusters on UPGMA dendrogram constructed based on Dice similarity coefficients. A clear clustering of genotypes according to the origin wasobserved. This clustering was also supported by principal coordinate analysis (PCoA) results. There was no observed clustering based on the protein content. The data revealed that local wheat genetic had narrow genetic diversity, however the wheat genotypes of foreign origin constitute a promising material to be employed in breeding programs aiming the increase of wheat protein content and genetic diversity.

Efficient and Simple Paper-Based Assay for Plasma Separation Using Universal Anti-H Agglutinating Antibody.

Conventional laboratory tests require plasma separation using centrifugation by skilled personnel in well-equipped lab. Development of a simple, reliable, and cheap point-of-care (POC) test for plasma separation will overcome these limitations. Plasma separation was achieved in filter paper using the anti-H agglutinating antibody. Hydrophobic channels were created using a solid ink printer. The reproducibility, efficiency, recovery, and applicability of the assay were validated on a large number of blood samples. A simple, fast, cheap, and direct paper-based assay for plasma separation from whole blood using universal anti-H agglutinating antibody was developed without equipment or pretreatment requirements. The purity of plasma separation using anti-H treated paper was confirmed by microscopy and biuret test for plasma albumin detection. Plasma separation was affected by paper structure, antibody concentration, donor gender, and hematocrit. The efficiency of the assay was 72% and the reproducibility was about 90% with minimal interassay and intra-assay variabilities. The assay successfully separated plasma from 116/119 samples, indicating high sensitivity (97.5%). Furthermore, the assay accurately recovers thyroid stimulating hormone from samples compared to standard methods with 107% recovery rate. Paper-based plasma separation using anti-H agglutinating antibodies would have numerous applications in paper-based POC tests and in resource limited areas.

Statistical Study of Extract Keratin Protein from Waste Chicken Feather Based on Response Surface Methodology

The feathers contain a significant amount of keratin protein, which is used in cosmetics, shampoos, hair treatment creams, and skin creams. Dissolving chicken feathers with reducing agent and then separating the protein from chemicals are the key steps involved. However, in order to enhance the amount of recovered keratin as much as possible, the best conditions for extracting keratin from chicken feathers are required. In this study, Response Surface Methodology (RSM) was used in order to simulate and optimize the operating parameters for extracting keratin from waste chicken feathers in order to increase the amount of keratin protein compared to previous studies. Dissolving chicken feathers using sodium sulphide as a reducing agent at various periods, temperatures, and concentrations is the first step in the fundamental technique. After the feathers have been dissolved with a reducing agent, the fluid is treated with an ammonium sulfate solution to precipitate the protein. As determined by a biuret test and UV-Vis analysis, the keratin protein had a maximum wavelength of 290 nm. Finally, the statistical optimization of the extraction conditions provided a better understanding of the reaction parameters. The optimum yield of keratin was achieved at 3.7 hours at 30.07°C with 0.05 M sodium sulfide.

PENGARUH PAPARAN LINEAR ALKALYBENZEN SULFONAT (LAS) TERHADAP KADAR PROTEIN TOTAL PADA IKAN NILA (Oreochromis niloticus) DENGAN METODE SPEKTROFOTOMETRI UV-VIS

Tilapia is a source of protein that is healthy and low in fat. Tilapia is a source of protein that is healthy and low in fat. Animal protein is found in fish, one of which is tilapia which has a protein content of more than 16.05%. One of the causes of protein denaturation is detergent. Razmi's research results, 2021 measuring the levels of laundry waste in Martapura river water in Sungai Lulut Village obtained concentrations at a distance of 100 meters of 3.4 mg/L, a distance of 200 meters of 2.4 mg/L and a distance of 300 meters of 1.6 mg/L. To determine the effect of exposure to Linear Alkalybenzen Sulfonate (LAS) on total protein levels in tilapia in the Martapura River and the effect of differences in time intervals of exposure to Linear Alkalybenzen Sulfonate (LAS) on total protein levels in tilapia in the Martapura River. This research uses Pre Experimental with Post Test Only Control Group Design approach. The test method was carried out qualitatively and quantitatively. The qualitative test method was carried out by the biuret test while the quantitative test method saw the difference in the time interval of exposure to Linear Alkalybenzen Sulfonate (LAS) on the total protein content of tilapia using Visible Spectrophotometric instruments. Data analysis using One-Way ANOVA. Based on the qualitative analysis, all samples were positive in the biuret test. The results of the quantitative analysis obtained were a decrease in total protein levels at intervals of 0.3,6,9 hours with an average control at 3 hours 2.26%, 3 hours to 6 hours 4.49%, and 6 hours to 9 hours. 4.5%. 501.64 ppm. The administration of LAS with different intervals of exposure (control, 3 hours, 6 hours, 9 hours) showed a significant effect on the total protein content of tilapia, namely a decrease in the total protein content.

Analysis of Protein Content of Hair Cream Enriched with Keratin Extract from Chicken Feathers

This work investigated the extraction of keratin from chicken feathers and the use of the extract in the production of hair cream, for a period of 2 weeks. The study is aimed at finding beneficial utilization of such wastes like chicken feathers in the improvement of beauty products. Standard chemical procedure for keratin extraction was used; pretreatment and dissolution of feathers, protein precipitation and protein purification. The results obtained indicate that keratin was extracted from chicken feathers using different reducing agents. The keratin produced was 61.4% pure and was subjected to biuret testing and finally used in production of hair cream. The protein content in the produced hair cream was also determined. The solvent used was obtained from the combination of sodium metabisulphite, urea and sodium dodecyl sulphate. The keratin tested positive to Biuret test and the protein content of the produced hair cream was 2.8% while the commercially available hair creams contained no protein. This work has shown that keratin can be obtained from organic wastes like chicken feathers and used in the fortification of hair cream- a typical conversion of waste to wealth.