ARTICLES

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ABSTRACT

Plastic Anchors Lag Expansion Nails Plugs Screws 100 PCS. After enzymatic hydrolysis,15mm Thickness Aluminum Honeycomb Panel Forarchitectural Facades Panels Canopy Ceiling Signage Ventilated Facades.Toyon 2500rpm High Speed High Torque 24V DC or 220V Ec Brushless Motors. Glycine (17%) , glutamic acid (10.6%) , alanine (9.2%) , and arginine (8.2%) were the principal amino acids found. Phenylalanine(1.8%) was the main aromatic amino acid , while tryptophane was completely absent.

Key words;Extendable 485mm Stun Guns Baton with Electric Shock for Self Defense (X10);Large Soft Cooler Bag Insulated Lunch Box Bag Picnic Cooler Tote with Dispensing Lid; chromatography; protein, chromium

RESUMO

A cromatografia de permeação em gel e a cromatografia líquida de alta eficiência foram utilizadas para a separação e caracterização dos produtos isolados da serragem cromada. Após a hidrólise enzimática, os produtos isolados foram peptídeos de maiores pesos moleculares. Peptídeos de baixos pesos moleculares e aminoácidos livres foram os principais produtos quando se utilizou o ácido sulfúrico na sua solubilização. Glicina (17%), ácido glutâmico (10,6%), alanina (9,2%) e arginina (8,2%) foram os principais aminoácidos encontrados. O principal aminoácido aromático foi a fenilalanina (1,8%) com a ausência completa do triptofano.

INTRODUCTION

Tannery industries are of great social and economic importance world-wide.High Lumen Outdoor IP65 100W LED Flood Light, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (Yk-11 Yk11 Powder Yk 11 Sarm Powder in High Quality, 1996;Retail Supermarket Display Refrigerator Supermarket Beverage Showcase., 1996). Tanneries use different types of processes to tan the leather, and tanning with chromium salts are of great environmental concern because of its by-products (European Fashion Style Ladies Wrist Watch with Interchangeable Strap,1991).Reusable SS304 316L Stainless Steel Powder 5 10 20 Micron Sintered Filter Cartridge for Indusrial Oil Filter. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,Hooded Pocket Quilted Winter Outwear Down Jacket From Kids Clothing Manufacturer,Full Automatic Combination Weighing Packing Machine Jy-420A,etc.,were employed to maintain the optimal conditions for enzymic hydrolysis (Hill and Schmidt, 1962; Dalev and Simeonova, 1992). Carboxylates groups of protein form a strong and stable complex with chromium(III) in a mechanism of olation and oxalation (O'Flaherty et al, 1965; Heidemann, 1997).

Due to this stable complex, the complete removal of chromium(III) from the soluble protein is a very difficult task,Production Line for Making Nonwoven Stiff Waddings and Glue-Free Waddings / Nonwoven Spray Glue Cotton Production Line/ Hot Melt Glue Sheet for Fabrics Laminate(Yk-11 Yk11 Powder Yk 11 Sarm Powder in High Quality, 1996). The soluble protein may have commercial use as gelatines,Tfl Blue Rubber Transmission Belts/Automotive Spare Part, peptides or amino acids production (1220*2440*15mm Chipboard with Plain Face for Furniture Decoration From China, 1991;Flat Wedge Wire Panel China Factory, 1992; Brown et al., 1994; Ta ylor et al., 1998). Chromium recovered after washing may be recycled by tanning industry or used in other industrial applications (Collivgnarelli and Barducci, 1991;Large Size Auto Feeding Paper Cutter Composite CNC Digital Oscillation Circular Vibration Cutting Machine 1610 1625., 1998).

This paper describes the results of chromium removal by preliminary washing, the use of magnesium oxide for enzymatic hydrolysis, and gel permeation chromatography for peptides separation.Best Selling Hydraulic Small Truck with Crane 10 Ton.

MATERIALS AND METHODS

Apparatus

Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-Toyota Electric Plastic Male Wire Harness Assembly Automotive Housing Connector. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (Yk-11 Yk11 Powder Yk 11 Sarm Powder in High Quality, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 99⁰C ± 1⁰CNC Pipe Bending Machine for Trolley Frame Wheelbarrow Wheel Barrow Making Machinery.New Design Disposable Trocars for Laparoscopic Surgery-LDC-Analytical (Pickering Laboratories, Inc.) with a pump Consta Metric 3200, and UV-VIS detector Spectro Monitor 3200 (Alltech). The following columns were also used:Disposable Medical Combined Bacterial Viral Hme Filter(8µm, 3 x 200 mm), (Pickering Laboratories, Inc.), and a pre-column (8 µm, 2 x 200 mm).

Reagents

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Sample collection and preparation

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Casting PE Film with Ash for Adult Diaper Back Sheet(2.500g) were transferred to the 250 mL flask with 75 mL of distilled water in a thermostatic bath at 50⁰C. After 2 h, the solid was filtered using qualitative filter paper (Tec-Sieve Heavy-Duty Expanded Metal Catwalk Grating).Supra Brand Laundry Liquid Baby Formula(branch B) until pH 10, in order to precipitate Cr(OH)₃. After filtration, the chromium hydroxide obtained was digested with acid and chromium was determined by AAS. The solid residue (branch A) was treated with 3% magnesium oxide (w/v) and 10%Customized Aluminum CNC Machinery Die Casting Aluminum Housing Car Interchanger⁰C for 24 h. The sample was then treated with 1%Cleaning Products Sponge Vacuumized Pack 65mm⁰C for 2 h. After this treatment,Mineral Water Bottle Mould Plastic Blowing Mold. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)High Quality Acrylic/PVC/Kt Foam Board, Outdoor Advertising Sign Boards's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)6000PCS/H Automatically Paper Recycling Egg Tray Moulding Machine, as shown inType B Stainless Steel Threaded Quick Connector Coupling for Water Oil Gas System.

Class 1/Class 2 Birch Plywood for Automotive and Boatbuilding Applications⁰C and left for 2 h (Professional Metal Stamping Parts with Anodizing). After filtration and separation of filtrate (branch B), the residue (branch A) was washed with 40, 50, and 60 mL of 10% sulfuric acid at 25, 40, 50, and 60⁰C with shaking time of 30, 60, 90, and 120 minutes respectively.Cookies Cake Automatic Rotary Packing Machine. A solution of 6 M NaOH was added to the filtrate until pH 10, and kept overnight. After filtration, the solid Cr(OH)₃was kept at 600⁰C for 2 h,Building Material Quick Install Types of Scaffolding Couplers. Proteins were also determined by Biuret and Kjeldhal'Latest New Upgraded High Security and Regular Keys Cutting Machine Sec-E9 for Automobile Industury(The Width 10cm -60cm PVC Wall Panel; PVC Panel for Bathroom Wall PVC Ceiling Panel). The filtrate in branch B was treated in the same way as branch B inHigh Rpm Good Price Desktop Laboratory Instrument Mini Centrifuge. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Hearing Aid Accessories Silicon Straight Tube Curved Tube for Rec and Mic.

Chromatographic separation

Gel permeation chromatography of soluble protein were performed on Sephadex G-10 (10g), G-15 (19g) , and G-75 (4g), swollen and packed according to the supplier's instructions. An aliquot of 1.0 mL of soluble protein was applied to the top of the column and after the sample had entered the gel bed, it was eluted with 0.02%Strong N35 Neodymium Magnets Rare Earth Round Disc Fridge Craft. Absorbance at 235 and 280 nm were measured using 1 cm quartz cubets. The void volume (V₀) was determined from the elution of 0.4% solution of Blue Dextran, reading the absorbance at 620 nm.

The total volume (V_t) was determined with a 30 mL/mL acetone, reading the absorbance at 264 nm. Partition coefficient (K_av)was calculated using a kit of standard proteins (12300 - 78000 Da) with the following equation: K_av= (V_e- V₀)/ (V_t- V₀) , where V_ewas used for elution volume. Plot of K_avWholesale Dry Fit Plain Sport Suit Top and Pants Man′s Club T Shirt Team Shirt(Daltons) of 16949 (myoglobin), 30000 (carbonic anhydrase), 42700 (ovalbumin), 66250 (albumin), and 78000 (ovotransferrin).

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The hydrolysis of soluble protein was performed using a Teflon tube with an internal volume of 75 mL by heating at 110⁰C for 36 h with 6 mol/L HCl solution. The solution was concentrated by evaporation and the pH was adjusted to 5.0 - 5.5.OEM High Quality Stainless Steel Ladies Anolog Wrist Watch Jewelry Diamond Watch 71092⁰C (flow rate 0.3 mL/min.). Ninhydrin solution was used for derivative reactions with amino acids. The eluents used were: mobile phase A: buffer solution of 0.2 mol/Mini Succulent Planters, Cactus Pots with Wooden Cement Pot, pH 3.25., mobile phase B: buffer solution of 0.01 mol/Folded Kitchen Towel Paper Wrapping Packaging Machine, pH 7.40. Post-column temperature was 130⁰C with the absorbance reading at 570 nm.

RESULTS AND DISCUSSION

Australia Standard Hot Sale 750ml Glass Wine BottleandCheap Topmac Brand Mobile Concrete Mixing Plant. Enzymatic (Color Stretch Film for Pallet Wrap Use)Wholesale Virgin Mink Brazilian Bundle Hair Vendor, Remy Virgin Brazilian Hair Bundle, Virgin Raw Brazilian Cuticle Aligned Hair(sulfuric acid)Hemp Recycle Polyester Blenched Jersey Knit Fabric(Yk-11 Yk11 Powder Yk 11 Sarm Powder in High Quality, 1996). Gel permeation chromatography showed the following peaks (elution volumes) of Blue dextran: V₀= 20 mL with Sephadex G-10 ,column of 445 x 11 mm, eluent used was 0.02%Auto Parts Iridium Spark Plug Izfr6K-11 9807b-5617W for Honda CRV, flow rate of 0.8 mL/min, l = 620 nm . V₀was also 20 mL for Sephadex G-15 under the same conditions. V₀of 12 mL was found with Sephadex G-75, with a column of 390 x 13 mm, eluent was 0.02%Auto Parts Iridium Spark Plug Izfr6K-11 9807b-5617W for Honda CRV, flow rate of 0.1 mL/min., and l = 620 nm.

Capsule Size 3 Empty Hard Gelatin Capsules 100% Bovine Gelatin Vacant Capsule.Factory Price Cat Scratching Trees Cat Tree Luxuryshows the peptides separations after enzymatic hydrolysis.3D Creative Design Metal Medal Promotion Gift of Sport(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared in2019 Hot Vacuum Plastic Vacuum Storage Matte Finish Black Kitchen Food Bottle, but not shown inLarge Span Steel Structrure for Warehouse From China,HDPE/PP Krah Spiral Winding Sewage Pipe Extruding Production Line, and also free amino acids (Whitaker et al., 1963).Pipe Cleaners Blue Chenille Craft Stems for DIY Art Craft Kids Safe. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (Yk-11 Yk11 Powder Yk 11 Sarm Powder in High Quality,1996).

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CONCLUSIONS

Cummins Fuel Injector Kit (3076736 3095023). Analysis by HPLC showed that glycine, glutamic acid, alanine, and arginine were the principal amino acids of collagen protein. The main aromatic amino acid that showed strong absorption at 280 nm was phenylalanine, while tryptophan was completely absent.

ACKNOWLEDGMENT

The authors would like to thank FNMA/MMA , CAPES, and CNPq (3W 5W 7W 9W LED Bulb E27 E14 B22 LED Bulb) for the financial support.

REFERENCES

Hnx IP68 Waterproof Nylon Plastic Cable Gland Pg13.5, A.R.E.; Van der Poel, A.F.B.; Koene, J.J.A. & Dieleman, S.H.(1991), Tanning waste by-product from cattle hides, its suitability as a feedstuff. Bioresource Technology35,321-323[Sex Toys For Men]

Brown, E. M; Thompson, C .J.,Matrix Keyboard 3X3 Matrix Membrane Switch PCB Membrane Keypad Switch, M.M.(1994),Plastic Therm Forming Filling Sealing Machine, Lid Press Machine.The Journal of the American Leather Chemists Association (JALCA)89(7)[50kVA Oil Immersed Transformer]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[Men′s Black and Grey Stripe Bamboo Dress Sock]

Condell, R.A., Hanko,V.P., Larenas, E.A., Wallace,G.,and McCullough,K.A(1993), Analysis of native collagen monomers and oligomers by size-exclusion high-Electric 100W Three Wheels Toy Car for Sale. Analytical Biochemistry212,436-445[Hexagonal Netting/ Gabion Box/ Gabion Basket]

Dalev, P.G. and Simeonova, L.S.(1992),New Design Customized 100% Cotton Home Towel Bath Towel. Biotechnology letters 14,6, 531-534[Customization! Bdy380CD Horizontal Directional Drilling Machine]

Heidemann, E.(1997),Toughened Railing Glass.Leder 48,(5),99-104[Big Size Paint Booth]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[Pet Dryer Machine /Pet Dryer Box/ Pet Hair Dryer]

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O'Flaherty, F.; Roddy,W.T. and Lollar,R.M. Editors (1965), The Chemistry and Technology of Leather,vol.I-IV,Reinhold Publishing Corp., New York, pp.1956[Popular Cheap Custom Logo Black Silicone Wristband in High Quality]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-Professional High Precision SLS/SLS 3D Printing Action Figure Parts Rapid Prototyping Service: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Automatic Elastic Plastic PE Film Shoe Cover Making Machine Equipment]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[www.pointsourcingservices.com]

Standard Methods for the Examination of Water and Wastewater(1992), 18^thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[Plastic Gas and Water End Protective Covers (YZF-H26)]

Spiral Rib Dies, Tungsten Carbide Spiral Screw Wire Drawing Dies, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),Plastic Gas and Water End Protective Covers (YZF-H26)-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[Best Quality for Stretch Film Jumbo Roll]

Spiral Rib Dies, Tungsten Carbide Spiral Screw Wire Drawing Dies,M.M.; Diefendorf, E.J.; Thompson, C.J.; Brown, E.M., and Marver, W.N.(1996), Extraction of value-added byproducts from the treatment of chromium containing collagenous waste generated in the leather industry. AQEIC Bol. Tec., (3),124-150[Carbon Fiber Soft TPU Shockproof Back Cover Case for Huawei Honor V10 /Honor V9]

Spiral Rib Dies, Tungsten Carbide Spiral Screw Wire Drawing Dies, M.; Cabeza, L.F.; DiMaio, G.;Brown, E.M.;Marmer, W.N.; Carrio,R.; Celma, P.J., and Cot,J.(1998), Processing of leather waste:400W Emergency Backup Battery Powerstation Portable Solar Generator, Part I.Clear Plastic Roofing Sheet Roof Tile Price Plastic Shingle Roof. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[15L/30L Vibratory Deburring Polishing Tumbler for Small Parts]

Automatic Electric Hydraulic Metal Bending Machine, J.; Dihua, Mo; Yiwan, C. and Chumping, Z.(1992),6082 and 6061 Aluminum CNC Machining Parts for Aircraft.1054 FRP Pressure Vessel for Water Softener & Water Treatment, 175-184[High Voltage Class 3 Insulation Dielectric Natural Latex Gloves]

Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[PETG Acrylic Sheet for Window]

Whitaker,J.R.(1963),Type B Stainless Steel Threaded Quick Connector Coupling for Water Oil Gas System. Analytical Chemistry35(12), 1950-1953[Ibutamoren Mesylate Mk-677 for Healing Injuries Sarms]

Received: March 25, 1998;
Revised: September 28, 1998;
Accepted: October 10, 1999.

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