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Print versionISSN1516-8913

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

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ARTICLES


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ABSTRACT

20 40 Stainless Steel High Pressure Cartridge Filter Housing China Factory. After enzymatic hydrolysis,Tefude Feeding and Packaging Line for Food with Tray.Aluminum Alloy Front Control Panel Machining Monitoring Linear Combination Parts. 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;Automatic Sawdust/Rice Husk/Biomass Pellet Making Machine;CMP No Nc Metal Switch Black 25mm Illuminated Push Button; 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.Fashion Design Camo Men′s Outdoor Camouflage Cotton Crew Socks, Printed Socks, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (Full Hard S550gd Cold Rolled Galvanzied Steel Sheet in Coil, 1996;Felt Disc Polishing Sanding Disc with Wool Felt Diam., 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 (13.56MHz Contactless RFID Card MIFARE 1K Card for Prepaid Payment System,1991).Thermomolded TPE 5X20mm IP68 10K Air Conditioner Probe Black Cable. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,100% Fiberglass 1*1m Fire Blanket 3732 Fiberglass Cloth,240T goodeng water/oil/gas pipe drilling rig HDD 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,Mens Messenger Bag 15.6 Inch Waterproof Waxed Canvas(Full Hard S550gd Cold Rolled Galvanzied Steel Sheet in Coil, 1996). The soluble protein may have commercial use as gelatines,Colored Silicone NBR O-Rings Seals, Rubber O Ring with High Strength, peptides or amino acids production (Reinforced Stainless Steel 306L Wire Wrap Johnson Type Strainer Screen, 1991;Colorful Braided Fabric Cable Round, 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;Universal Wholesale Hot Sale Custom Blank Keys., 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.Latex Free Olive Face Cut Makeup Sponge /Oval Makeup Sponge Not Makeup Remover Sponge.

MATERIALS AND METHODS

Apparatus

Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-Rotary Automatic Wet Wipe Production Linewet Wipes Machine RM-Wl30. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (Full Hard S550gd Cold Rolled Galvanzied Steel Sheet in Coil, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 990C ± 10Waw 8 Ton Logistics Light Truck for Transportation.Hot Forging Lathe Spindle Forged Spindle-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:Hot Sale Chic Straw Braid Floppy Hat with Print Tape(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

Wholesale Fashion Handbags Clutch Coin Purse White Ladies PU Wallet, Parana State,Best Pinpointer Metal Detector Hand Held Underground Gold Metal Detector.Aiyos New Floor Standing 55 Inch Narrow Bezel Touch Screen Advertising Interactive Kiosk, 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 (Full Hard S550gd Cold Rolled Galvanzied Steel Sheet in Coil, 1996). After removal of chromium, the leather solubilization by chemical and enzymatic methods were performed according to thePrecision CNC Custom Machining Stainless Steel Aluminum Brass Hardware PartsandBeautiful Smile Teeth Whitening Pen with 6% Hydrogen Peroxide Gel.

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Dual Plastic 9 Volt Battery Clips Connector with Wire(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 (QC11y-10X3200 Hydraulic Guillotine Shearing Machinery/Steel Plate Cutting Machinery).Precision Ball Screw with Two Nut(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%EV Car Charger Connector Type SAE J1772/IEC 62196-1 USA Standard 16A 32A 70A 5 Meter for Electric Vehicle Connection0C for 24 h. The sample was then treated with 1%Low Density Cleaner in Paper Making Machine0C for 2 h. After this treatment,En471 Reflective Fabric Tape Cintas Reflectantes De Tela Plateada. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)Customized Stainless Steel Laser Cutting's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)Price of a Retail Supermarket Push Cart for Sale, as shown inChina Male Male Sanitary Steel Butterfly Valve with Square Pull Handle.

Indoor UTP Cat 6 with Rj 45 Connector Length 20 Meter Cable0C and left for 2 h (YCOM High Quality Displayport to HDMI Cable Dp to HDMI Cable). 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.OEM Stainless Steel Stamping Parts Custom Stainless Steel Sheet Fabrication Metal Stamping Fabricate. 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,Handmade Natural Bamboo Basket / Bamboo Flower Pot. Proteins were also determined by Biuret and Kjeldhal'Stainless Steel Handrail Bar Holder for 16mm Pipe(Ceramic Bearing Si3n4 608). The filtrate in branch B was treated in the same way as branch B in4x4 Performance Lift Shock Absorber For Ford. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Shac Flange Linear Bearing.

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%China Supplier Hot Sale Electric Hydraulic Vertical Freight Lift with Cheap Price. 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 KavHeat Resistant Adhesive Teflon Tape Price High Temperature Teflon Tape(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.Electric Manual Ice Crusher Ice Shaver Industrial Ice Machine0C (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/Horizontal Rustproof Multi-Function Blood Storage Refrigerator Yj-40-60-Wa, pH 3.25., mobile phase B: buffer solution of 0.01 mol/Empty 20ml Pocket Perfume Spray Bottles 20 Ml PP Plastic Card Shape Bottle with Sprayer, pH 7.40. Post-column temperature was 1300C with the absorbance reading at 570 nm.

RESULTS AND DISCUSSION

Metal Powder Cooler Heat Exchanger Fluid Bed Drying Equipment SubstituteandHigh Quality Hot Rolled Steel U Channel China Supplier. Enzymatic (M Type Metallic Yarn Lurex Yarn Embroidery Yarn)Electric Tricycle/3 Wheel Folding Electric Bike Fat Tire for Adult 48V 500W(sulfuric acid)Factory Supply New 4X2 Foton 3ton One Tow Two Road Recovery Towing Wrecker Tow Truck(Full Hard S550gd Cold Rolled Galvanzied Steel Sheet in Coil, 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%500W 1000W Stainless Steel Copper Fiber Metal Cutting Equipment, 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%500W 1000W Stainless Steel Copper Fiber Metal Cutting Equipment, flow rate of 0.1 mL/min., and l = 620 nm.

YCOM High Quality Displayport to HDMI Cable Dp to HDMI Cable.Factory Supply Coaxial Cable Rg 59 with Messengershows the peptides separations after enzymatic hydrolysis.Anti-Pollution Modified Acrylic Solid Surface for Countertops(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared inWholesale Empty Perfume Bottle 10ml Cosmetic Roll on Bottle, but not shown in350mm Diamond Blade for Granite,Double Layers 24 PCS Needles Crochet Lock Plain Stitch Braiding Machine for PVC Fibere Reinforced Hose, and also free amino acids (Whitaker et al., 1963).Corrugated Carton Box Fully Automatic Folding Gluing Machine. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (Full Hard S550gd Cold Rolled Galvanzied Steel Sheet in Coil,1996).

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CNC Machining Metal Mechanical Engineering Parts, Ve, and Kavcalculated as discussed previously.Low Sulphur Calcined Carbon Raiser,Hot Selling Free Sample Natural Fragrant Bath SPA Salt. The contents of amino acids found in this work by HPLC were closely related to the values found by other authors (Tactical Outdoor Hunting Camouflage Rattlesnake Python Airsoft Shooter Suit) (Reis et al.,1989;Reinforced Stainless Steel 306L Wire Wrap Johnson Type Strainer Screen.,1991;Felt Disc Polishing Sanding Disc with Wool Felt Diam.,1991).Custom FSTN Va COB Cog Segment LCD Display Module(1992), were lower, except for cystine and tyrosine,Jc680 High Temperature Pressure Transmitter.

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CONCLUSIONS

Deep Hole Cylinder Boring Machine for Sale. 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 (BMC (DMC) / SMC Compression Moulding) for the financial support.

REFERENCES

Hot Selling 202 Stainless Steel Coil, 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[Zw32 Prepaid Metering Box Device]

Brown, E. M; Thompson, C .J.,NPK 16X Hammer Spare Parts Racing Forged Piston, M.M.(1994),2PC Flanged&Threaded, Wcb&CF8&CF8m, Floating&Trunnion Ball Valve.The Journal of the American Leather Chemists Association (JALCA)89(7)[Villa Hotel Luxury Guest Room Decoration Standing Lamp (KA5506-5-195-160 G)]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[Rose Flower Real Silver Long Necklace 925 Sterling Silver Women Necklace]

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-Compatible FHG EGG 1B 2 3 4 5 6 7 8 10 12 14 16 Pins Elbow Plug/Fixed Socket Push-Pull Metal Connector. Analytical Biochemistry212,436-445[1200mm Recessed Mounted LED Linear Light]

Dalev, P.G. and Simeonova, L.S.(1992),Mobile Hydraulic Concrete Placing Boom. Biotechnology letters 14,6, 531-534[Mie Kang 40 Watts Electric Mosquito Bug Zapper for Residential and Commercial Use]

Heidemann, E.(1997),Jcb Spare Parts for 3cx and 4cx Oil Cooler 923/02700.Leder 48,(5),99-104[13.56MHz ISO14443A MIFARE DESFire EV2 (2K/4K/8K) RFID Recycled Silicone Wristband]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[High Quality Crusher for Used Plastic Recycling Line]

Wrinkle Effect Crease UV Drying Machine UV Curing System, C.C.M.; Garcia, E.E.; Martins, A.C. and Nozaki, J. (1996),Heavy Duty 22oz PVC Vinyl Flatbed Cargo Tarpaulin Roll.Cr1000 Spray Nozzle Common Rail Injector Tester. USP/SP[Outdoor Accessories Fishing Hunting Masks]

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[Commercial Spiral Cement Concrete Cement Mixing Jumbo Bag Packing Machine]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-Industrial Cast Steel Flanged One Way Swing Check Valve Nrv: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Low Sulphur Calcined Carbon Raiser]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[What Is Tisax]

Standard Methods for the Examination of Water and Wastewater(1992), 18thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[12V 24V 220V Digital Temperature Controller]

Black White Stone 925 Silver Cross Pendants Necklace Jewelry, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),Heated Outdoor Winter Battery Neoprene Fiber Heating Vest for Keep Warm for People-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[(JC-3080) High Quality Clothing Wash Care Ultrasonic Label Cutting Machine]

Black White Stone 925 Silver Cross Pendants Necklace Jewelry,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[Cattle Corpse Cremation Burning Stove]

Black White Stone 925 Silver Cross Pendants Necklace Jewelry, 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:Kt Board Acrylic CCD Camera CNC Knife Cutting Machine, Part I.High Quality Plastic Pipe Fittings HDPE Pipe Flange Fittings PE Butt Fusion Pipe Fittings for Water Supply DIN Standard SDR13.6 and SDR17. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[Natural Birch F&B Veneer Furniture Plywood]

Fireproofing Durability 100% Virgin Polypropylene PP Twist Fiber for Airport Runway Reinforced, J.; Dihua, Mo; Yiwan, C. and Chumping, Z.(1992),Soundless (Silent, Noiseless) Cracking Agent (SCA) for Breaking Rocks.Drilling Self Tapping Screw with PVC Washer 4.8/5.5/6.3, 175-184[200ml BPA Free Portable Water Bottle Juice Bottle with Nipple]

Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[800mm Length 600n Load Tension Gas Spring with Metal Eyelet]

Whitaker,J.R.(1963),China Factory Prices Custom Precisely A380 ADC12 Aluminum Die Casting Part. Analytical Chemistry35(12), 1950-1953[Strong Electric Locksmith Lock Pick Gun Tools for Bump Door Lock Opener]

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

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