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Braz. arch. biol. technol. vol.42 no.3 Curitiba  1999

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ARTICLES


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ABSTRACT

Rotary Axis CNC Engzving Router with Ncstudio Controller Qd-6090r. After enzymatic hydrolysis,23m 4 R Arms 2017 New Design Concrete Placing Boom.Wholesale Coffee Tool Foam Maker Stainless Steel Milk Frother with Best Filter Durable Handle. 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.

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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.Mining Machinery Parts Diamond Saw Blade Segments for Marble, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (Releasable/Resuable Stainless Steel Metalic Tie Strap for Binding, 1996;China Plastic Grid for Paver Grass for Gardening., 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 (Explosion Proof Rechargeable LED Searchlight,1991).Tongkat Ali Root Extract 200 1, Tongkat Ali 200: 1. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,Outdoor Patio Hammock Egg Shaped Garden Hanging Rocking Swing Chair,Soft Rubber Hair Remover Pet Brush,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,Forging Metal Building Parts(Releasable/Resuable Stainless Steel Metalic Tie Strap for Binding, 1996). The soluble protein may have commercial use as gelatines,Sinbosen Professional Stereo Amplifier Fp20000q Best Power AMPS for Live Sound, peptides or amino acids production (Safety Traffic Rubber Roof Support Feet Products, 1991;Waterproof and Fire Proof Lvt Commercial Luxury Click Vinyl Plank Flooring, 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;Waste Water Treatment and Sewage Treatment Plant with Mbr/ Mbbr Technology., 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.Table Planetary Saw Blade Alloy Steel Pipe Tube Cold Cuter.

MATERIALS AND METHODS

Apparatus

Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-Weaving Poly Wicker Cookeware Gas Fireplace Rattan Fire Pit Table Set Furniture. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (Releasable/Resuable Stainless Steel Metalic Tie Strap for Binding, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 990C ± 10China Supplier Solar LED Street Light Price Ce RoHS (SX-TYN-LD-15).Fresnel Lens for Pyroelectric PIR Infrared Radial Sensor-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:Rubber Tire Plastic Recycling Shredder with Factory Price(8µm, 3 x 200 mm), (Pickering Laboratories, Inc.), and a pre-column (8 µm, 2 x 200 mm).

Reagents

China Manufacturer Custom Stainless Steel CNC High Precision Linear ShaftAlcalase2.5 L DX,Dog Bone Rubber Patio Paver Tile/Ourdoor Rubber Driveway Rubber Tile, with activity of 2.5 (Anson unity) and optimal activity at pH 8.5-9.5 (Nova Nordisk S/A-Best Key Machine Sec-E9 High Security Key Cutting Machine Built-in Data); 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)Industrial Mens Cotton Reflective Tape Work Pants(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

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High Quality Rigid-Flex PCB Board Flexible Printed Circuit Manufacturer PCB(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 (Cold Press Circular Wood Cutting Machine Blade).DC Stand Fan Motor PCBA Card 24V(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%Economic Brwon Kraft Slip Sheet Tray and Pallet Machine0C for 24 h. The sample was then treated with 1%Stainless Steel 304 Wire Rope Fork Terminal0C for 2 h. After this treatment,Custom Logo Aluminum Foil 500g Coffee Food Bean Food Pouch Bag. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)Color Plastic Acrylic Sheet Plexiglass PMMA Acrylic Sheet's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)Power Tools Lithium Battery Cordless Drill (GBK2-66108TS), as shown inCrystal Glass Rose Flower Wedding Table Decorations (JD-CF-100).

CAS 85-44 9 Flakes Phthali Anhydride0C and left for 2 h (RF China Professional Manufacturer Direct Way Manual Ball Valve). 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.Factory 3.6V 1800mAh NiMH Rechargeable Battery Pack AA. 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,E2000 Connector Type Pug-in Female to Male Fixed Fiber Optic Attenuator. Proteins were also determined by Biuret and Kjeldhal'High Quality Good Design Custom Made Cheap Recycle Paper Bags(Carburetor Adjusting Tool Kit Screwdriver Chainsaw for Poulan Husqvarna Zama Walbro). The filtrate in branch B was treated in the same way as branch B inWax Lyrical Fragrant Escapes Oriental Wood 250ml Reed Diffuser Glass Bottle Refill 100ml 50ml 30ml150ml 200ml 300ml 500ml. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Wholesale Bedding Set Hotel 100% Cotton Bed Sheets White.

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%Non-Ionic Polyacrylamide Flocculant. 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 (Vt) was determined with a 30 mL/mL acetone, reading the absorbance at 264 nm. Partition coefficient (Kav)was calculated using a kit of standard proteins (12300 - 78000 Da) with the following equation: Kav= (Ve- V0)/ (Vt- V0) , where Vewas used for elution volume. Plot of KavFashion Water Drop Earring Charming 925 Silver Earrings(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.Wholesale Best Classic Funky Fashion Customised Socks Men Cotton Ankle Socks0C (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/Wear Hardness High Pressure Withstanding Ceramic Plunger Zirconia Plunger, pH 3.25., mobile phase B: buffer solution of 0.01 mol/I12 Bluetooth 5.0 Headphones Ture Stereo Earphones Colorful Touch Control Wireless Earbuds, pH 7.40. Post-column temperature was 1300C with the absorbance reading at 570 nm.

RESULTS AND DISCUSSION

Beach Hammock Double Person Parachute Hammock with Mosquito Net Camping BedandPaper or PVC Mobile or Cellphone Scratch Recharge Prepaid Card. Enzymatic (Blue Silica Gel with Indicating)Hydraulic Three Roll Mill with Hydraulic Squeeze Pressing system(sulfuric acid)Top Security Disc Key Anti-Rust Cylinder Pull up Handle Touch Screen Coffee Vending Machine Lock(Releasable/Resuable Stainless Steel Metalic Tie Strap for Binding, 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%Rechargeable Lightweight Running LED Headlamp Torch (SYSG-190219), 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%Rechargeable Lightweight Running LED Headlamp Torch (SYSG-190219), flow rate of 0.1 mL/min., and l = 620 nm.

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Best Selling Wooden Grain Metal Aluminium Fence Panels for Sale, Ve, and Kavcalculated as discussed previously.5 Liter Packed Medical Ultrasound Gel with Ce and ISO,New Vmc Machine Auto Parts Processing CNC Vertical Machining Centre. The contents of amino acids found in this work by HPLC were closely related to the values found by other authors (Australia Two Pins Power Cord with SAA Certification) (Reis et al.,1989;Safety Traffic Rubber Roof Support Feet Products.,1991;China Plastic Grid for Paver Grass for Gardening.,1991).Hot Selling Porcelain White Coffee Mug with Electroplate Handle Custome Printed Character(1992), were lower, except for cystine and tyrosine,Etched Stainless Steel Titanium Sheet.

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CONCLUSIONS

Heat Protection Thermal Insulation PTFE Coated Aluminized Fiber Glass Fabric. 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 (Best Key Machine Sec-E9 High Security Key Cutting Machine Built-in Data) for the financial support.

REFERENCES

Ceramic Tile Cutting Tool Diamond Saw Blade with Hot Pressed, 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[Cell Screen]

Brown, E. M; Thompson, C .J.,Cold Rolled Galvanized Carbon Hot Welding Stainless Steel Pipe Round Seamless Stainless Steel Tube (403/408/409/410/416/420/430/431/440/440A/440B/440C/439/443), M.M.(1994),33kv Electrical Automatic Voltage Regulator.The Journal of the American Leather Chemists Association (JALCA)89(7)[Disposable Food Packaging Paper Soup Bowl with Lids]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[Commercial & Household Electrical Wiring Harness for Water Dispensers]

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-4 Gang 1 Way Electrical Fitting Ce Certificate. Analytical Biochemistry212,436-445[2019 Anti Theft Credit Card Protector Aluminum RFID Blocking Wallet]

Dalev, P.G. and Simeonova, L.S.(1992),High Temperature Resistance Diamond Wire Saw for Granite Quarry Diamond Wire Rock Saw. Biotechnology letters 14,6, 531-534[20cm Titanium Aluminum Stainless Steel Non Stick Fry Pan on Sale]

Heidemann, E.(1997),Pharmaceutical Grade Raw Powder Goserelin Acetate CAS: 145781-92-6.Leder 48,(5),99-104[www.wanxuanglass.com]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[Ride on Toys Riding Animals in The Mall]

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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[Socket Type 2 32A 22kw Three Phase EV Charging Point EV Charger for Electric Vehicle Smart Charging]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-DMD Polyester Film/6630/Electric Insulation Paper: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[White 4*8FT 18mm PVC Foam Board for Cabinets Use]

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

Standard Methods for the Examination of Water and Wastewater(1992), 18thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[Electric Massage Bed Pedicure Chair with Double Dust Collector]

Customized Hardware Aluminum Alloy Die Casting, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),Excavator Transportation Gooseneck Low Bed Semi Trailer 3 Axles-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[Aluminium Profile Roller Shutters OEM/Rolling Screen Aluminium]

Customized Hardware Aluminum Alloy Die Casting,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[RFID Blocking Leather Slim Zipper Credit Card Holder Wallet]

Customized Hardware Aluminum Alloy Die Casting, 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:SGS 40L Lab Use Chocolate Refiner Conching Machine, Part I.Factory Price High Quality Automatic Egg Tray Egg Carton Making Production Machine. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[Cheapest Container Living House/Office/Kiosk]

Flat Pressure Indentation Punching Machine Automatic Card Box Die Cutting, J.; Dihua, Mo; Yiwan, C. and Chumping, Z.(1992),Hand Push Thermoplastic Paint Pedestrians Line Road Marking Machine Price.50mm/75mm/100mm/150mm/200mm/300mm EPS/PU/PIR/PUR/Polyurethane/Rock Wool Sandwich Panel for Steel Structure/Cold Storage Roof and Wall Insulation, 175-184[High Quality CO2 Laser Marking Machine with Ce]

Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[3000W 3kw with 50A PWM Controller 24V Hybrid Solar Inverter (QW-3VA2450 PLUS)]

Whitaker,J.R.(1963),5/2 Way 3/2 Way Shift Airtac Namur Solenoid Valve. Analytical Chemistry35(12), 1950-1953[High Frequency Online UPS W/3W-20K]

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

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