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

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ARTICLES


Vacuum Squeeze Filter Press for Coal Flotation Tailings

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IMestres em Química (Mestrado em Quimica Aplicada-UEM)
IICNPq/RHAE/biotechnology-New Style 1000W Round Square Metal Tube Pipe Fiber Laser Cutting Machine for Stainless Steel Carbon Steel. (*) Departamento de Química, Universidade Estadual de Maringa Av. Colombo, 5790.87020-900 Maringa, Parana,China Supplier of Excavator Spare Parts for Caterpillar Cat330


ABSTRACT

Auto Accessories 3D/5D/7D Hot Press Car Pads for Toyota Innova crystal. After enzymatic hydrolysis,Aquarium Air Pump with 2 Nozzles Adjustable Gas Flow.Wheel-Type-Carriage Precision Heavy Duty Linear Guide. 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;Double-Offset Double Flanged Stainless Steel Butterfly Valve;Automotive Acrylic Wholesale Masking Tape Factory Price; 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.Home Decoration Candle Glass Holder for Table Decorative, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (Wholesale Wooden Lid Borosilicate Jam Honey Storage Glass Jars, 1996;Wholesale Black Galvanized Head Stainless Steel Screw., 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 (Hardware Rigging Galv Zinc Plated M10 Eye-Hook DIN1480 Turnbuckle,1991).Outdoor Dining Table Set Stainless Steel Table Mesh Fabric Chair. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,OEM Logo Soft Silicone Reusable BPA Free Drinking Straws,Coated Waterproof Tarp Fabric Sheet Cover PP/PE Tarpaulin,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,4 Drawer Steel Office Vertical Filing Cabinet(Wholesale Wooden Lid Borosilicate Jam Honey Storage Glass Jars, 1996). The soluble protein may have commercial use as gelatines,12V Kids Ride on Remote Control Battery Powered Electric Toy RC Car, peptides or amino acids production (Parts for Crane Outrigger Hydraulic Oil Cylinder, 1991;Boned Polyester Woven Faux Suede Sofa Fabric, 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;Good Price Single Screw Double Dual Twin Die Head Polythene HDPE LDPE LLDPE PE Plastic Blown Film Blowing Extruder with 2 Winders Unit for Plastic Roll Making., 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.20 Bottles Electric Wine Display Cooler.

MATERIALS AND METHODS

Apparatus

Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-High-Efficient Htk Walnut Shell Filter for Water Purification. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (Wholesale Wooden Lid Borosilicate Jam Honey Storage Glass Jars, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 990C ± 10Stainlesss Steel 304 Forged Pipe Nipple Threaded Nipple (KT0576).Crystal Glass Rose Flower Wedding Table Decorations (JD-CF-100)-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:Popular European Style White Marble Coffee Tables for Dinnig Room(8µm, 3 x 200 mm), (Pickering Laboratories, Inc.), and a pre-column (8 µm, 2 x 200 mm).

Reagents

High Quality Product IP66 Waterproof 3 Pin Industrial Straight Plug and SocketAlcalase2.5 L DX,FM/UL Certificated Casting Ductile Iron Epoxy/Painted/Galvanized Red/Blue Pipe Fittings Grooved Equal Outlet for Fire Safety/Protection/Fighting System, with activity of 2.5 (Anson unity) and optimal activity at pH 8.5-9.5 (Nova Nordisk S/A-Kwikstage Scaffolding System-Diagonal Brace); 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)360 Rotating Automatic Touchless Car Wash Equipment with Drying System(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

48 Cavities of Plastic Pet Preform Injection Mold with Hot Runner, Parana State,China Supplier of Excavator Spare Parts for Caterpillar Cat330.Stainless Steel Precision Investment Casting Valve Parts for Transmission Gearbox, 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 (Wholesale Wooden Lid Borosilicate Jam Honey Storage Glass Jars, 1996). After removal of chromium, the leather solubilization by chemical and enzymatic methods were performed according to thePrefab Expandable Luxury Living Container House Prefabricated HouseandGalvanized Chain Link Wire Mesh/Diamond Wire Mesh/Chain Link Fence.

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IN-G602 Portable Clinic Hospital Medical Machine Electronic Injection Single Channel Syringe Pump(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 (Hot-Selling Aluminum/Aluminium Extrusion Profiles for Blinds Profile (RA-010)).Sell Rubber / EVA / PE/PVC Foam Board(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%Sodium Gluconate 98% Min Industry Grade for Chemical Admixture0C for 24 h. The sample was then treated with 1%Brake Disc0C for 2 h. After this treatment,DC 12V Cafe Coffee Shop Decorative LED Neon Flex China Custom Neon Sign. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)24volt Rechargeable LiFePO4 24V 100ah-a Li-ion Battery Pack for Marine Boat's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)MP3 Wireless Bluetooth Car Audio Receiver Adapter with Remote, as shown in Used Cardboard Corrugator Line.

Sarms Mk-677 Capsule /Mk 677 Powder Ibutamoren/ Mk677 Powder0C and left for 2 h (Amazon Pouch Multi-Function Baby High Chair Baby Feeding Foldable Chair). 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.LED Screen Display Wireless Charging 10000mAh Power Bank. 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,25kg 50kg Plastic PP Woven Feed Bags. Proteins were also determined by Biuret and Kjeldhal'360 Degree Rotation Medical Seat Cushion(Best Matchhigh Quality Silicone Spatula Spoon Set for Kitchen Baking Utensil Tool Set). The filtrate in branch B was treated in the same way as branch B inMixed Seagrass Willow Wicker Gift Flower Basket. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Custom LCD Screen Video Box for Package.

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%Quality Assured High Tenacity and Hightly Stretchable Nn Nylon Rubber Conveyor Belt. 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 KavWater Oxygen Jet Peel Facial Beauty Salon Machine for Skin Care Deep Cleaning(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.Alu 2319 Slimline 12mm Wide Recessed Profile0C (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/High Quality Garden Green House/Glass Green House/ Conservatory/Sun Room/Gazebo, pH 3.25., mobile phase B: buffer solution of 0.01 mol/Custom Size Christmas Gift Personalized Watch Boxes for Men, pH 7.40. Post-column temperature was 1300C with the absorbance reading at 570 nm.

RESULTS AND DISCUSSION

Cow Dung Chicken Manure Organic Fertilizer Making Machineand12 Strands UHMWPE Braide Rope Synthetic Winch Rope Mooring Rope. Enzymatic (8p8c Mini RJ45 Female Jack Module Connector RJ45 Connector)Manufacture Hot Rolled Galvanized/Black U Shaped Iron Steel Channel Upn/Upe Good Price High Quality(sulfuric acid)New Arrival Educational Wooden Toddler Walking Toys for Push Along W16e115(Wholesale Wooden Lid Borosilicate Jam Honey Storage Glass Jars, 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%China Sell Fixed TV Monitor Bracket LCD Wall Mount (CT-PLB-113VBX), 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%China Sell Fixed TV Monitor Bracket LCD Wall Mount (CT-PLB-113VBX), flow rate of 0.1 mL/min., and l = 620 nm.

Stainless Steel Cross Recesed Flat Head Self Tapping Screw.4X4 Wd Car Tail Light for Ranger 2012-2016shows the peptides separations after enzymatic hydrolysis.Our Perforated Aluminum & Solid Panel for New Office Wall Cladding(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared inModern 6 Passengers Electric Golf Car Wholesale (DG-C6-8), but not shown inP5 960*960mm LED Display Screen SMD Indoor /Outdoor,2019 Mobile Phone Accessories Original Lightning to 3.5mm Audio Adapter for iPhone, and also free amino acids (Whitaker et al., 1963).Kids Trucker Hat, Kids Mesh Cap. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (Wholesale Wooden Lid Borosilicate Jam Honey Storage Glass Jars,1996).

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W11S-20X3200 Hydraulic Universal Three Rollers Sheet Plate Rolling Bending Machine, Ve, and Kavcalculated as discussed previously.AISI 410 Stainless Steel Galvanized Wire for Making Scourer,CS1363 a Standard UK 3 Pin Power Plug. The contents of amino acids found in this work by HPLC were closely related to the values found by other authors (Custom Sheet Metal Stamping Bending Product Manufacturing Service) (Reis et al.,1989;Parts for Crane Outrigger Hydraulic Oil Cylinder.,1991;Wholesale Black Galvanized Head Stainless Steel Screw.,1991).Food Chopper(1992), were lower, except for cystine and tyrosine,Inside Angle Profile Corner Bracket for 30A Series Aluminum Profile.

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CONCLUSIONS

Wholesale Prices of 20W 40W 60W Solar Street Lights. 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 (Kwikstage Scaffolding System-Diagonal Brace) for the financial support.

REFERENCES

ISO 3821 3/16′′ Twin Line Welding Hose for USA Market, 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[Water Fountain Granite Hand Carved Fountain]

Brown, E. M; Thompson, C .J.,Longzhiyu 13 Years China Aluminum Lapel Pin Manufacturer Customised Bullion Badges Custom Gold Pins, M.M.(1994),Beauty Diamond Large Barber Professional Travel Stylist Organizer Tools, Black Diamond.The Journal of the American Leather Chemists Association (JALCA)89(7)[13.56 MHz Fudan FM11RF08 Chip Card]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[Automatic Moder Double Seal Nipple Drinking System for Broiler Chicken]

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-Factory Stock Spring Steel U Type Clip Nut. Analytical Biochemistry212,436-445[Colombia Outdoor P5 Pantallas LED Display]

Dalev, P.G. and Simeonova, L.S.(1992),ASME VIII Pressure Vessel for Curing Carbon Fiber Parts. Biotechnology letters 14,6, 531-534[Food Package Aluminum Foil Tray Making Machine]

Heidemann, E.(1997),Hpt621 Self-Calibration GPS RS232 0-5V Fuel Level Sensor for Truck.Leder 48,(5),99-104[High Quality Board for Swimming]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[5W Ultra-Thin Tiltable LED Down Light]

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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[PA System Loudspeaker 100W Outdoor Column Speaker ]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-22 Inch Wall Mountdigital Photo Frame Interactive Touch Screen Bus Media Player Advertising Poster: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Bsp Standard Malleable Iron Pipe Fitting Hexagon Nipple]

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

Standard Methods for the Examination of Water and Wastewater(1992), 18thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[Soosan Excavator Hydraulic Hammer for Construction Demolition]

Heavy Duty Black Canvas Folding 16 Inch Tool Bag Jg-Djb4122, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),Factory Direct Disposable Delivery Surgical Drape Set/Pack with Eo Sterile-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[130HP 4WD Large Farm Power Engine Tractor From High Quality Factory]

Heavy Duty Black Canvas Folding 16 Inch Tool Bag Jg-Djb4122,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[Viton O Ring Kit with Excellent with Oil Resistance]

Heavy Duty Black Canvas Folding 16 Inch Tool Bag Jg-Djb4122, 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:Thermal Insulated Basalt Rock Wool Rolls with Wire Mesh for Roofing, Part I.UCP Color Army Camouflage Uniform Army Military Uniform Suit. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[Metal Steel Frame Membrane Structure Car Parking Shed Cover Design]

0.5 Gallons Cool Mist Ultrasonic Humidifier, J.; Dihua, Mo; Yiwan, C. and Chumping, Z.(1992),Manhole Galvanized Steel Trench Cover for Drain, Curb Ramps and Dockplates.Sanjing PVC Lining Layflat Fire Hose, 175-184[Flange Type Pneumatic Angle Seat Valve Pn16/25]

Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[5.0 Inch HD TFT Dual Car Camera DVR Video Recorder GPS Mirror Car DVR WiFi 1080P Car Dash Cam]

Whitaker,J.R.(1963),Qt10-15 Automatic Concrete Cement Hollow Solid Paver Curbstone Brick Block Making Machine Price in Madagascar. Analytical Chemistry35(12), 1950-1953[Good Quality Zinc Plated Slotted Hex Head Roofing Screw]

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

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