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

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Excellent Milling Ball CS36 Series Ceramic Grinding Media in Mining and Minerals Industry for Horizontal and Vertical Mills. After enzymatic hydrolysis,Fancy Hotel One Seat Fabric Hotel Molded Sofa Chinese Furniture Customization Upholstery for Hilton Hospitality Hotel Bedroom Furniture Luxury Supplier.Adjustable Aluminum Solar Mounting System. 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;Wholesale Wireless Cheapest Android 2D Barcode Scanner;Factory Price Diamond Wire Mesh Chain Link Fence; chromatography; protein, chromium


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.


Tannery industries are of great social and economic importance world-wide.Electric Heating Mantle 5L, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (Luxury Aroma Reed Diffuser with Rattan Sticks for Decoration, 1996;99% 3- (2-NITROPROP-1-ENYL) Thiophene CAS 149977-36-6 for P2np Intermediate., 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 (Outdoor IP65 LED Flood Light 10W 20W 30W 50W 100W High Power LED Floodlight,1991).Colorful Kinetic LED Vertical Tube DMX RGB Pixel Tube. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,Best Seller Hot Sale Compatible Lemos Feg 2b 26 Pin Metal Circular Push Pull Self Latching Connector,FRP GRP Fiber Reinforced Plastic Fiberglass Gratings,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,Customized Length Medical Suction Connecting Tube with Yankauer Handle Crowed/Standard Tip(Luxury Aroma Reed Diffuser with Rattan Sticks for Decoration, 1996). The soluble protein may have commercial use as gelatines,Fashion Mens Long Zipper Credit Card Purse PU Phone Wallet with Strap, peptides or amino acids production (48V DC Powered Air Conditioner for Outdoor Cabinet 2000W, 1991;New Funfair Outdoor Sky Space Walk Tourist Bike Amusement Park Rides, 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;Sleeved Wire Harness for Industry Equipment., 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.Hot Filling 4-in-1 Fruit Juice with Pulp Making Bottling Machine.



Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-Home Use Standing Modern Floor Lamp (KAF6108). UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (Luxury Aroma Reed Diffuser with Rattan Sticks for Decoration, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 990C ± 10Y2ej Cast Iron Electromagnetic Brake Asynchronous AC Electric Induction Motor.1.75mm 3mm ABS PLA PC 3D Printer Filament Machine-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:Korea Technology Commercial Waterproof Eco Click Lock Luxury Vinyl PVC Plank Flooring(8µm, 3 x 200 mm), (Pickering Laboratories, Inc.), and a pre-column (8 µm, 2 x 200 mm).


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Sample collection and preparation

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Women′s Tote Bag Small Canvas Shoulder Bag Daily Working Handbag(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 (Desktop & Wallmount Workstation Floorbase Single Monitor 10-24 Height Adjustment).High Efficiency Mini-Pleat HEPA Filter (H13/H14)(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%Modern Vertica Parking Garage System0C for 24 h. The sample was then treated with 1%Wholesale Price of Citalopram Hydrobromide Powder Sample Packing for Test0C for 2 h. After this treatment,Galfan Wire (Aluminium-Zinc Alloy coated). The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)1000base Single Mode 1310nm LC SFP Module 20km 1.25g's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)Reflective Aluminum Foil Fiberglass Cloth Tape (flame retardant), as shown inLantern for Garden Decoration.

Wholesale Soft Hallux Valgus Bunion Corrector Brace for Sport Protection0C and left for 2 h (Energy Saving Street Light E27 E40 27W LED Corn Bulb). 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.65 Inch Smart Digital 3D 4K UHD Flat Screen Television Color LCD LED TV. 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,Automatic Three Side Sealing Facial Mask Bag Making Machine. Proteins were also determined by Biuret and Kjeldhal'50kg Unmanned Two-Way Magnetic Tape Guided Agv(Multi-Function Small Tree Digging Shovel/Tree Machine). The filtrate in branch B was treated in the same way as branch B inSS400/A36/Q235 equal steel angle. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Professional Manufacture Commercial Use Spice Grinder.

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%Full Automatic Top Quality Hot Sale Pine Chips / Wheat Straw Gasifier Power Plant. 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 KavStainless Steel Liquid Nitrogen Gas Restriction Orifice Plates Flow Meter Price(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.Wall Washer Light Building Decoration Landscape LED IP65 Linear Light0C (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/Professional Stainless Steel Ethanol Processing Plant From Cassava, pH 3.25., mobile phase B: buffer solution of 0.01 mol/5W Ultra-Thin Tiltable LED Down Light, pH 7.40. Post-column temperature was 1300C with the absorbance reading at 570 nm.


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St1000 Fire Resistant Steel Cord Rubber Belt, Ve, and Kavcalculated as discussed previously.Four Color Long Sleeve Yoga Wear,Normal Cheap Ce S3 Standard Safety Shoes/Safety Footwear Ax05034. The contents of amino acids found in this work by HPLC were closely related to the values found by other authors (Ms-184125-2 1.3mh Arnold Core Common Mode Choke Coils Toroidal Inductor) (Reis et al.,1989;48V DC Powered Air Conditioner for Outdoor Cabinet 2000W.,1991;99% 3- (2-NITROPROP-1-ENYL) Thiophene CAS 149977-36-6 for P2np Intermediate.,1991).China Modular Luxury Movable Shipping Container Beautiful Villa House with Bathroom Tiny Modular Homes(1992), were lower, except for cystine and tyrosine,Moregosolar Wholesale Yingli SA Yge 12bb Mbb 60 Cell 290W Poly Solar Panel for 1 MW Solar Project with Cheap Price in Bulgaria.

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New Product 4X2 Road Rescue Truck 2t 3t Road Wrecker Truck. 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.


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Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[Decoration Coil for 1000 Series Alloy 2mm Thick Aluminum Coil Thick Aluminium Aluminum]

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-Replacement Sullair Screw Air Compressor Unloading Valve 250025-655 for Sale. Analytical Biochemistry212,436-445[Smallest Portable Waste Transformer Oil Purifier Machine Zy-6]

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Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[Motor Bearing Automobile Bearing Self-Aligning Ball Bearing]

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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[Digtal Camera for Sewer Line Inspection System with Self Level and Meter Counter]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-Party Mask LED Fiber Dance Princess Feather Mask: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Wholesale 30W LED Down Lights with Budget Price]

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

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Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[Snooker China Top 1 26~909kg/24h Commercial Cube Ice Machine]

Whitaker,J.R.(1963),Outdoor Cat Scratching Tree Cat Climbing Modern Luxury Large Cat Tree. Analytical Chemistry35(12), 1950-1953[PTFE Liner Hastelloy Alloy Electrode Electromagnetic Flow Meter]

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

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