ARTICLES

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ABSTRACT

2019 Male & Female Stainless Steel Quick Coupling. After enzymatic hydrolysis,Pikachu PU Squishy Slow PU Foam Slow Rising Squish Kind Toys.Digital Floating Baby Care Products Frog Bath Design Thermometer. 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;Vertical Granule Grain/Peanuts/Seeds/Sugar/Rice Packing Automatic Filling Packaging Machine;Exterior Fireproof Wall Decoration Skirting Kitchen Cabinet HPL Board; 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.FiberMania 1u Sliding Fiber Optic Patch Panel Loaded with SC Simplex Single Mode Adapters, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (Colorful Asphalt Shingle for Roof Water Proof, 1996;Durable Inline Hockey Skate Puck., 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 (Powder Injection Molding MIM Machinery Parts for Turbo Vnt Nozzle Ring (vane),1991).18mm Thickness Best Quality Poplar Birch Commercial Plywood. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,European Design Overhead Crane 3.2 Ton 5 Ton 10 Ton 16 Ton 20 Ton Electric Wire Rope Hoist Demag,Coroplast/Corflute/Correx/Corrugated/Fluted/Hollow/Twinwall/Multiwall PP/Plastic Sheets for Sign and Box,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,Nylon Hammer Fixings Drive Anchor(Colorful Asphalt Shingle for Roof Water Proof, 1996). The soluble protein may have commercial use as gelatines,OEM Electrolyte Effervescent Tablet, peptides or amino acids production (Aluminium Alloy Photo Chemical Etching Acoustic Perforated Metal Mesh, 1991;6kw Fiber Laser Metal Cutting Machine for Both Stainless Steel Carbon Steel and Round and Square Tube Fiber Laser Cutter, 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;Antique Stainless Steel Sheets Thailand 430 Stainless Steel Sheet., 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.20m3/H Wet Mix Concrete Mixer Machine Mobile Concrete Batching Plant.

MATERIALS AND METHODS

Apparatus

Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-304 321 310 310S Welded Decorative Stainless Steel Pipe. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (Colorful Asphalt Shingle for Roof Water Proof, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 99⁰C ± 1⁰Hot Sale! ! ! Bearing 608 Ceramic Deep Groove Ball Bearing (608ZZ/RS).Manual Electric Winch Small Winch 220V Winch-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:250ml Medical Transparent Ultrasound Ultrasonic ECG Gel Wholesale Price(8µm, 3 x 200 mm), (Pickering Laboratories, Inc.), and a pre-column (8 µm, 2 x 200 mm).

Reagents

Kitchen Condiment Bottles Spice Seasoning Salt Pepper Grinder Storage JarAlcalase2.5 L DX,Plastic PVC Business Credit Card Fresnel Lens Magnifier Hw-805A, with activity of 2.5 (Anson unity) and optimal activity at pH 8.5-9.5 (Nova Nordisk S/A-Good Quality Low Price 18mm Natural Ash Veneer Fancy Plywood); Biuret reagent (Bioclin-Quibasa); standard solution of protein mixture IV (12300-78000 Daltons-Merck); standard solution of 0.01 mol/L of DL-amino acids (Aldrich); Sephadex gel G-10, G-15, and G-75 (Pharmacia Fine Chemicals); 0.4% (m/v) solution of blue dextran (Sigma); 0.2% (m/v) solution of ninhydrin (Sigma) dissolved in acetone; 0.02%(m/v)Metal Stamping Bending Sheet Metal Fabrication for CNC Machinery Part(Aldrich); 0.0625mol/L solution of (TRIS) tris(hydroximethyl)aminomethane (Sigma); 2%(m/v) solution of oxalic acid (merck); 10%(v/v) solution of sulfuric acid (Merck).

Sample collection and preparation

Aluminum Plate Fin Heat Exchanger/Oil Cooler Core, Parana State,Jy-606m Wooden Armrest Lecture Theatre Chair Function Hall School Chairs.3X Desk Clip-on Magnifying Glass Lamp LED Light PCB Inspection, exposing directly to the sun during 5 or 6 h. The preliminary washing step was performed with 2% (m/v) solution of oxalic acid in thermostatic bath at 50⁰C and 2 h with shaking (Colorful Asphalt Shingle for Roof Water Proof, 1996). After removal of chromium, the leather solubilization by chemical and enzymatic methods were performed according to theMedical Ce Approved Bp Machine Blood Pressure MonitorandProfessional Pulse Dust Filter for Grain Processing.

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3mm/0.21mm Aluminum Cladding Building Material Aluminum Composite Plastic 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 (Men′s Black and Grey Stripe Bamboo Dress Sock).5-Axis CNC Machining Billet Aluminum Engine Rotary Housing(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%EPE Foam Sleeve Net Cushion Air Protective Packaging for Glass Bottle⁰C for 24 h. The sample was then treated with 1%Custom Clamshell Book Shape Black Cardboard Magnet Gift Box⁰C for 2 h. After this treatment,Fashionable Simple Printing Mini Key & Coin Purse. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)CL2T-SF304L Comlom Military Folding Steel Spade with Portable Pouch's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)Kids Folding Play Mat Kids Play Room Floor Mat, as shown inHexagonal Netting/ Gabion Box/ Gabion Basket.

Roller Window Shutter for Residential Usage⁰C and left for 2 h (Customization! Bdy380CD Horizontal Directional Drilling Machine). 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.Pre-Seasoned Cast Iron 5-Piece Cookware Set. 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,Eaton Caterpillar Komatsu Hydraulic Joystick Excavator Spare Parts. Proteins were also determined by Biuret and Kjeldhal'High Power Driver and Flexible LED Strip in One Aluminum LED Profile Channel(Pet Dryer Machine /Pet Dryer Box/ Pet Hair Dryer). The filtrate in branch B was treated in the same way as branch B inUltipower 48V 25A High Frequency Battery Charger with BMS. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Hydraulic Hose SAE 100 R1AT.

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%Shacman F3000 420HP 6X6 Tractor Truck with Cummins Engine. 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_avL Shaped Corner Support Brackets Brace Fixed Hardware for Wood Jssb07(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.Ts-Micro Portable Defense Loudspeaker System⁰C (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/Waterproof Fireproof Spc Click Floor PVC Vinyl Floor Tile 4mm 5mm 6mmm, pH 3.25., mobile phase B: buffer solution of 0.01 mol/Medical Supply for Laparoscopic Instrument (MIM Straight Scissors), pH 7.40. Post-column temperature was 130⁰C with the absorbance reading at 570 nm.

RESULTS AND DISCUSSION

Different Thickness Mirror Color Coated Almn1cu Almg2.5 Aluminium Coil with PVCand86bl3a125 1.65A 660W 310V BLDC. Enzymatic (Tamper Evident Branded Printed Packing Pet Adhesive Security Tape)530ml Glass Spirits, Liquor, Wine, Vodka, Whisky Bottle(sulfuric acid)Hotel Use and Steel Material Poultry House for 10000 Chickens(Colorful Asphalt Shingle for Roof Water Proof, 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%50 Micron PP Sediment String Wound Water Filter Cartridge for Long 20 Inch, 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%50 Micron PP Sediment String Wound Water Filter Cartridge for Long 20 Inch, flow rate of 0.1 mL/min., and l = 620 nm.

Kontron One-Piece 10-Lead EKG Cable with Resisitance.Popular Cheap Custom Logo Black Silicone Wristband in High Qualityshows the peptides separations after enzymatic hydrolysis.Best Price of Peanut Digger / Groundnut Harvester in Australian Africa(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared inAutomatic Elastic Plastic PE Film Shoe Cover Making Machine Equipment, but not shown inPlastic Gas and Water End Protective Covers (YZF-H26),China Manufacture Table Type CNC Horizontal Boring Milling Machine, and also free amino acids (Whitaker et al., 1963).White Electrical Fireplace Warmer. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (Colorful Asphalt Shingle for Roof Water Proof,1996).

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Carbon Fiber Soft TPU Shockproof Back Cover Case for Huawei Honor V10 /Honor V9and15L/30L Vibratory Deburring Polishing Tumbler for Small Partsshow the gel chromatographic separation of soluble protein with Sephadex G-Luzhong-250 25HP 2WD Belt Drive Mini Agricultural Tractor.Denso Diesel Pump Injector E Valve Oil Pump Injector Valve E Denso Diesel Steel Rod Denso Fuel Valve Rod, and another peak at 45 mL not shown inPETG Acrylic Sheet for Window, for peptides lower than 3000 Da.4GB 8GB 16GB 32GB 64GB Memory Card SD Card Mobile Phone(Condell et al.,1993) .

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1 Inch Stainless Steel Flexible Exhaust Pipe, V_e, and K_avcalculated as discussed previously.Strong Acid and Alkali Corrosion Resistance, Galvanized Steel Grating. 403,Zx4 Zx5 EV Style Speaker Passive Speaker PRO Audio. The contents of amino acids found in this work by HPLC were closely related to the values found by other authors (White Crystal Fashion Bridal Jewelry Accessories Wedding Tiara) (Reis et al.,1989;Aluminium Alloy Photo Chemical Etching Acoustic Perforated Metal Mesh.,1991;Durable Inline Hockey Skate Puck.,1991).Aps Replacement Air Compressor Parts (1627410123) Air Oil Separator(1992), were lower, except for cystine and tyrosine,Ce Certificate High Security Steel Shackle Padlock.

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CONCLUSIONS

Drive Shaft for Jmc 8-94134458-PT. 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 (Good Quality Low Price 18mm Natural Ash Veneer Fancy Plywood) for the financial support.

REFERENCES

DSG Ball Screw Fixed Seat Nut Support, 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[Rigid Pvc Crust Foam Board]

Brown, E. M; Thompson, C .J.,Colorful Park Amusement Park Rides Ride on Car Kids Electric Ride on Car, M.M.(1994),Apex Digital UV Printers for Aluminum Board Printing UV6090.The Journal of the American Leather Chemists Association (JALCA)89(7)[Volatile Oil]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[ Powder]

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-24 Molds Commercial Ice Cream Cone Maker. Analytical Biochemistry212,436-445[Galvanized Iron / Stainless Steel Crimped Square Woven Wire Mesh]

Dalev, P.G. and Simeonova, L.S.(1992),Weichai Open Type Rated Powe 300kw Diesel Generator with Wp13D385e200 Engine. Biotechnology letters 14,6, 531-534[Cooler Pad Wet Corrugated Paper Water Curtain Evaporative Cooling Pad for Poultry Farm]

Heidemann, E.(1997),Fashion Children Fur Pompom Beanie Scarf Knit Set.Leder 48,(5),99-104[Portable High Pressure Water Pump]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[Powerful Neodymium Pot Magnet Rare Earth Pot Magnet]

PCBA SMT Equipment PCB Depaneling Machine, C.C.M.; Garcia, E.E.; Martins, A.C. and Nozaki, J. (1996),Steel Jacket Steam Insulation Pipeline Production Best Price.Haa 800mAh NiMH Battery Pack. USP/SP[Ridge Cap Panel Forming Machine Ridge Cap Making Machine]

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[3 Layer Film Blowing Machine]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-Silver Band OEM Logo Ten Solid Color High Quality Men Cotton Boxer: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Aluminum Plate Fin Heat Exchanger/Oil Cooler Core]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[Dermabration Facial Machine]

Standard Methods for the Examination of Water and Wastewater(1992), 18^thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[China Original Dongfeng Cummins 6CT Diesel Engine Fuel Transfer Pump]

Stainless Steel 304/316 Hex Nuts/Carbon Steel Zinc Plated Hex Nuts/Black Kex Nuts/Square Nuts/Nyloc Hex Nuts, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),Electronic Muscle Stimulator EMS Machine for Slimming-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[High Quality Paulownia Wood Board Wood Drying Kilns for Sale]

Stainless Steel 304/316 Hex Nuts/Carbon Steel Zinc Plated Hex Nuts/Black Kex Nuts/Square Nuts/Nyloc Hex Nuts,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[Electrial Galvanized Conduit Box/Gi Pipe Fitting]

Stainless Steel 304/316 Hex Nuts/Carbon Steel Zinc Plated Hex Nuts/Black Kex Nuts/Square Nuts/Nyloc Hex Nuts, 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:Indoor Mild Steel Balcony Railing Designs Spiral Staircase with PVC Handrail, Part I.Good Price Molded Customized Cr TPR EPDM OEM Rubber Bellows Dust Cover. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[Modern Wall Art Decor Interior 3D Effect Wall Panels for Home Decoration]

Fiber Optic Cable 24 Core Multimode/Singlemode Optical Fiber, J.; Dihua, Mo; Yiwan, C. and Chumping, Z.(1992),Custom Precision Aluminum Die Casting for Bicycle Accessories.China Cheap Factory Wholesale OTR Tubeless Tyres 23.5-25, 175-184[Machine For Making Sugarcane Juice]

Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[L Shaped Corner Support Brackets Brace Fixed Hardware for Wood Jssb07]

Whitaker,J.R.(1963),Custom Shape Zinc Alloy Die Casting Metal Key Ring Chain. Analytical Chemistry35(12), 1950-1953[Two Wheel Foldable Electric Kick Scooter]

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

EPE Foam Sleeve Net Cushion Air Protective Packaging for Glass BottleAuthor for correspondence