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ABSTRACT

Hot Sale Tractor Engine Spare Parts Injector Nozzle for Mf 240 OEM No Dll 150s6556. After enzymatic hydrolysis,5PCS Travel Mini Eye Makeup Brushes Set Eyebrow Brush Make up Brushes.SBR Round DOT Horse Stall Mat, Rubber Stable Mat. 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;Customized Frame Mount Highway Pegs Enclosure Parts;Double Wine Carrier Bag Gift Box Tote; 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.IP44 Waterproof 3pin 16A Electrical Male and Female Industrial Plug and Socket, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (40*60cm Top Coated White Direct Thermal Bar Code Paper Sticker Labels for Rolls, 1996;RF Coaxail BNC Male to BNC Male Plug Connector Adapter., 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 (Gt4b63 Can Seamer Machine,1991).Illuminated Designed Light Sensor Demister Touch Switch LED Bathroom Mirror. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,Glazed Metal Roof Tile Roll Forming Machine with Ce,Industrial Packing Paper Pulp Tray Making Machine Egg Tray Making Machine,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,Embossed Lattice PU Synthetic Leather for Bags/Handbags (HS703)(40*60cm Top Coated White Direct Thermal Bar Code Paper Sticker Labels for Rolls, 1996). The soluble protein may have commercial use as gelatines,Physical Rehabilitation Pain Relieve Cellulite Reduce Shock Wave Therapy Equipment, peptides or amino acids production (Standard Disposable Oxygen Mask/Nebulizer Mask with Tubing, 1991;Extruder Floating/Sinking Fish Feed Pellet Dryer, 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;Custom Durable Silicone Rubber Seal Ring for Pressure Cooker., 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.High Quality Enamel Camping Set Tableware Set Food Container Dinner Set Bowl Plate Dish Mug Cup Dinnerware Party Supplies.

MATERIALS AND METHODS

Apparatus

Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-Kunba Vertical Automatic Food Packing Sealing Machine CBS-1100V. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (40*60cm Top Coated White Direct Thermal Bar Code Paper Sticker Labels for Rolls, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 99⁰C ± 1⁰Quality Assured Magnetic Building Blocks for Children.Factory Price Lawn Sprinkler Portable Sprinkler Irrigation System-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:Heavy Duty Industrial Biodegradable Plastic Garbage Bag Black/Gary(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

Glass Wool Sandwich Panel Metal Roof Price/Glass Wool Board, Parana State,New Condition Textured Peas Soy Protein Making Machine.SMT E2 Type Air Coils Inductors Inductance Range 5.0∽ 60.0nh E2r230-10.3nj for Ssb Radio Equipment Use, 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 (40*60cm Top Coated White Direct Thermal Bar Code Paper Sticker Labels for Rolls, 1996). After removal of chromium, the leather solubilization by chemical and enzymatic methods were performed according to thePVC Hdo Construction FormworksandChina Top Roof Tiles Making Machine with Reasonable Price.

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99% Al2O3 High Alumina Ceramic Ball(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 (CNC Engraving Machine Laser Marking for Assembly Line).Factory Price Long Life Portable Peltier Air Cooler(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%8W/12W Dimmable Interior Ceiling LED Recessed/Flush Can/Spot Down Lights for Museum/Salon/Club⁰C for 24 h. The sample was then treated with 1%Hand Tools 9PCS Hex Key Set CRV Allen Wrench⁰C for 2 h. After this treatment,UV-Proof Wr 4-Layers Non-Woven Bonded Fabric for Car Cover. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)Nail Art Drawing UV Spider Metal Gel Acrylic Lace String Painting Gel Supply's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)Handheld Andriod POS with Thermal Printer, as shown in78mm Aluminum Gold Color Plastic Jar Screw Cap.

Stainless Steel French Earring Hook for Jewelry⁰C and left for 2 h (Exterior Fireproof Wall Decoration Skirting Kitchen Cabinet HPL Board). 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.Professional Metal Stamping Parts with Anodizing. 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,Agriculture Indoor Vegetables and Fruits Planting Greenhouse. Proteins were also determined by Biuret and Kjeldhal'Night Vision Wide HD Waterproof Car Side View Camera for Bus(High Precision Plastic Mold Manufacturer in China). The filtrate in branch B was treated in the same way as branch B inBasketball Court Synthetic Suppliers for Sale. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Kukai 2019 New Version China High Security Sec-E9 Key Cutting Machine Free Upgrade.

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%5 Micron Big Blue 10 X 4.5 Pleated Washable Sediment Water Filter. 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_avE2000/APC Fibre Optic Leads and Cables(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.Physical Foaming Wire Extruder⁰C (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/Business Men Soft Genuine Leather Wallet Credit Card RFID NFC Blocking Card Holder Protective Case Fold Style Safe Protector Holder, pH 3.25., mobile phase B: buffer solution of 0.01 mol/10 Solid Top/Cap Construction Block Making Machine Qt10-15 Automatic Hollow Block Brick Molding Machine, pH 7.40. Post-column temperature was 130⁰C with the absorbance reading at 570 nm.

RESULTS AND DISCUSSION

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Zircon Butterfly Open Ring Diamond Fashion Woemn Rings.Ce Jacket Heated Water Chocolate Holding Tank Manufacturershows the peptides separations after enzymatic hydrolysis.EVA Puzzle Mat with Letters for Kids Playing Customized Pictures(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared inDual USB Charger Switch Panel 12V Cigarette Lighter Power Socket & LED Voltmeter and on-off Buttom Switch for Marine Boat Car RV Truck Camper Vehicles, but not shown inLarge Water Capacity PP Pleated Material 60 Inch 5 Micron Water Cartridge Filter for Power Plant Treatment,Gold Parquet Marble Copper Side End Table, and also free amino acids (Whitaker et al., 1963).Crop Top Vest Fitness Drawstring Padded Gym Women Sleeveless Tank Sport Clothing. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (40*60cm Top Coated White Direct Thermal Bar Code Paper Sticker Labels for Rolls,1996).

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CONCLUSIONS

ASTM D2846 Schedule 40 CPVC 4-Ways Fittings Cross. 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 (Cummins L10 Engine Piston Cooling Nozzle 3070218) for the financial support.

REFERENCES

High Grade Nitrous Oxide Gas / Laughing Gas / N2o, 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[Durable and Safe Interior Steel Grating Walkway]

Brown, E. M; Thompson, C .J.,Holykell 200mm, 750mm Cuttable Capacitive Diesel Fuel Level Sensor, M.M.(1994),Easy Soak off OEM 10ml Gel Nail Polish.The Journal of the American Leather Chemists Association (JALCA)89(7)[Lace Control Hiphugger Braless Latex Body Shaper L81187]

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

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-Cosmetic Case Box Packaging Makeup Case for Outdoor. Analytical Biochemistry212,436-445[Ge Holter Cable Snap Type Holter ECG Cable]

Dalev, P.G. and Simeonova, L.S.(1992),Ygk-017 80*45-D mm Factory Supplying Aluminium Electrical Cabinet. Biotechnology letters 14,6, 531-534[Supra Brand Laundry Liquid Baby Formula]

Heidemann, E.(1997),Aluminum Foil Container Making Machine, Pneumatic Punching Machine.Leder 48,(5),99-104[Rare Earth Chloride Supplier & Manufacturer]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[OEM Customized Logo Print Polyester Nylon Gym Sport Blue Drawstring Backpack Bag Supplier]

Small Batch Processing Football Net, C.C.M.; Garcia, E.E.; Martins, A.C. and Nozaki, J. (1996),LED Pixel Light U4 1.2W.Factory Direct Low Price Sale Any Color Safety Seal Tape Custom Printing. USP/SP[Gold Open Metal Short Crocodile Wallet for Girl Women Lady]

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[Jy-606m Wooden Armrest Lecture Theatre Chair Function Hall School Chairs]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-15L/30L Vibratory Deburring Polishing Tumbler for Small Parts: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Stainless Steel 304 Sanitary Pipe Fitting Weld / Tri Clamp /Reducing Tee]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[Well-designed Carriage Bolts Din 603 - Blue white zinc plated thread rod - Jiangyu ]

Standard Methods for the Examination of Water and Wastewater(1992), 18^thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[Ce Certificate High Security Steel Shackle Padlock]

10/16A EV Potable Charging Station Type 2 621962 Plug Cee, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),Luxury Wedding Ball Gowns Puffy Cap Sleeves Bridal Dresses W201794-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[Blue Color Tie-on Surgical Face Mask Soft Touch]

10/16A EV Potable Charging Station Type 2 621962 Plug Cee,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[Nylon Hammer Fixings Drive Anchor]

10/16A EV Potable Charging Station Type 2 621962 Plug Cee, 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:Precise Filtrate Infusion Set, IV Fluid Set with Precision Filter & Luer Lock, Part I.Big Power 12 LED Moving Head Light with 40W RGBW 4in1 LED. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[Class 1/Class 2 Birch Plywood for Automotive and Boatbuilding Applications]

Low Noise Ventilating Blower Fan for Agriculture, J.; Dihua, Mo; Yiwan, C. and Chumping, Z.(1992),Waterproof Chipboard, Melamine Chipboard for Furniture.Trendy OEM Customised Logo Ce Personalized Famous Brand Small Orders Sun Glasses Designer Sunglasses Women, 175-184[Hot Dipped Galvanized Bucket Holder Bucket Hook]

Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[PCBA SMT Equipment PCB Depaneling Machine]

Whitaker,J.R.(1963),35kw Low Temperature Intergrated Chemical Industrial Evaporative Cooled Water Chiller. Analytical Chemistry35(12), 1950-1953[Digital Control with LED Display DC Solar Small Deep Freezer Fridge]

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

Plastic Ceiling RoseAuthor for correspondence