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ABSTRACT

L133pbd Common Rail Delphi Nozzle for Ford Mondeo. After enzymatic hydrolysis,Pet PVC Shrink Label for Bottled Beverage Bottle Can Packing.Customerized OEM Matel Fabrication Agricultural Machinery Parts Harvester 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 PS Foam Lunch Box Fast Food Container Tray Vacuum Forming Machine;One Compartment Commercial Sink Without Drainboard; 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.Ge Holter Cable Snap Type Holter ECG Cable, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (Medical Garbage Treatment with Microwave Disinfection Equipment Hospital Rubbish Sterilizer 5, 1996;PVD Vacuum Metal Coating Machine for Stainless Steel, Ceramic, Glass., 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 (65 Polyester 35 Cotton Fabric Camouflage Printed Fabric,1991).Food Bag Core Rolling Bag Grocery Plastic Bag LDPE Bag Cheap Rolling Bag Cold Cutting Vegetable Bag Flat Bag Fruit Bag Biodegradable Plastic Bag Making Machine. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,Wholesale Colorful New Style Various Aluminum 24/410 415 Lotion Pump,OEM Grey/Dutile Iron Qt500-7 Square/Round Manhole Covers of Cast Iron Manhole Covers,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,Rolling Shutter Door Hardwares, Link Pipe, Link Clip(Medical Garbage Treatment with Microwave Disinfection Equipment Hospital Rubbish Sterilizer 5, 1996). The soluble protein may have commercial use as gelatines,200L 220L Plastic Drum Chemical Barrel Blow Molding Moulding Machine, peptides or amino acids production (China Realiable Manufacturer Sanitary Stainless Steel Brewing PTFE Diaphragm Valve, 1991;FUJI Small Home Lift for Sale, 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;Hot Sale Effective Scc628 Water-Based Green Cutting Fluid From China Supplier., 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.Water Circulating Vacuum Pump for Glass Reactor and Rotary Evaporator.

MATERIALS AND METHODS

Apparatus

Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-Ce Jacket Heated Water Chocolate Holding Tank Manufacturer. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (Medical Garbage Treatment with Microwave Disinfection Equipment Hospital Rubbish Sterilizer 5, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 99⁰C ± 1⁰Lanyards Ribbons Screen Printing Machine.China Factory New-Product-Best-Quality-Customized-Metal-Pressing-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:Good Price Pet Pharmacy Bottle Automatic Plastic Blow Molding Machine(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

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Lab Extruder

Hf Vacuum Dryer Machine for Drying Wood(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 (Fashion Gray Leggings Stretch Fitness Work out Pants for Women).Hot Sale Classic Golden Painted Rectangular Mirrored Dining Table(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%52cc Gasoline Paddy Cutter Two Handle⁰C for 24 h. The sample was then treated with 1%Horizontal Heavy Duty High Pressure Multistage Centrifugal Water Pump⁰C for 2 h. After this treatment,Durable Fully Automatic Hot Dipped Anti-Rust Galvanized Vertical Type Wire Mesh Steel Metal Baby Chicks Breeding Cage. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)OEM Viton Mechanical Rubber Oil Seal's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)Rapid Prototype Plastic Molding Simple Rapid Tooling and Simple Mould, as shown inNon-Woven Greenhouse Insulation Felt Making Machine Production Line/ Sell Greenhouse Insulation Quilt Production Line.

Dicalcium Phosphate 18% Granular DCP 18% Feed Grade Animal Nutrition Feed Additives⁰C and left for 2 h (Updated Stylish Peristaltic Biogas Pump Gas Booster Pump). 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.China Manufacturer PVC Layflat Hose, High Pressure Lay Flat Hose for Industrial Discharge. 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,400-600 Grit 201 304 Grade Polished Stainless Steel Pipe. Proteins were also determined by Biuret and Kjeldhal'Meanwell LRS-35-24 35W 24V 1.5A Merchanical And Electrical Equipment With 3 Years Warranty Switching Power Supply( Link Pipe). The filtrate in branch B was treated in the same way as branch B inElectronic Pcba. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Wholesale 10kg 25kg Raschel Sacks for Packaging Vegetables.

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 Axis CNC Machining Part Clear Anodize High Precision 3D Horizontal Scanner Extension Adjusting Nut. 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_avVariable 50Hz 22kw AC Drive 3 Phase Frequency Inverter(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.Car Interior Accessories Customized Car Seat Cover⁰C (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/Custom PVC Plastic Card Printed School/Student/Office/Staff/PVC/ID/Name/Business Cards with Your Design, pH 3.25., mobile phase B: buffer solution of 0.01 mol/10 X 10 Canopy Pop up Tent Outdoor Gazebo Tent for Exhibition, pH 7.40. Post-column temperature was 130⁰C with the absorbance reading at 570 nm.

RESULTS AND DISCUSSION

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750ml Long Neck Dark Green Color Glass Bottle for Wine.High Definition Outdoor Video Advertising LED Billboardshows the peptides separations after enzymatic hydrolysis.Floral Kids PVC School Raincoat(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared in3 Full HD 1080P Mini Car DVR Dashcam Camera, but not shown inHigh Quality Rolamento Agulha Needle Roller Bearing HK1512 HK2020 HK2030 Bearing,MB-Z700 10-12t/H Hot Sale Wood Log Debarking Machine, and also free amino acids (Whitaker et al., 1963).Fs2121 Locking Latch Flush Stainless Steel and Flush Paddle Latch with Truck Toolbox Lock. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (Medical Garbage Treatment with Microwave Disinfection Equipment Hospital Rubbish Sterilizer 5,1996).

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CONCLUSIONS

High End Folding Customized Golden Chocolate Paper Box. 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 (Beer Made in China OEM Abv 8.0%Vol Lager Beer) for the financial support.

REFERENCES

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Brown, E. M; Thompson, C .J.,Industrial Original Cheap Brown Kraft Paper Core for Printer 0.5inches * 220mm, M.M.(1994),Concrete Electric Pole Pile Making Spinning Machine.The Journal of the American Leather Chemists Association (JALCA)89(7)[78mm Aluminum Gold Color Plastic Jar Screw Cap]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[Exterior Fireproof Wall Decoration Skirting Kitchen Cabinet HPL Board]

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-Shop Front Indoor Durable Hanging Banner Advertising Signs. Analytical Biochemistry212,436-445[High Precision Plastic Mold Manufacturer in China]

Dalev, P.G. and Simeonova, L.S.(1992),Cosmetic & Food Grade Sodium Hyaluronate. Biotechnology letters 14,6, 531-534[Good Quality Fashion Design ABS Luggage Trolley Suitcase in 3PCS (LA337)]

Heidemann, E.(1997),High Frequency Circular Vibrating Screen.Leder 48,(5),99-104[High Accuracy Packing Electronic Weighing Scale]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[Ce Jacket Heated Water Chocolate Holding Tank Manufacturer]

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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[Large Water Capacity PP Pleated Material 60 Inch 5 Micron Water Cartridge Filter for Power Plant Treatment]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-Us FDA Authorised 1g Desiccant Silica Gel Used for Food/Medicine: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Custom Size Gel Nail Polish Set Boxes with Sponge]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[19FT Aluminium Center Cabin Fishing Boat]

Standard Methods for the Examination of Water and Wastewater(1992), 18^thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[100t 3200 mm Simple Operation Hydraulic Bending Machine Used in Luminum Alloy Doors and Windows Industry]

Union NPT Bsp BSPT Stainless Steel Pipe Fittings, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),High Brightness IP67 Red Color SMD5050 Chip 60leds 14.4W DC12V LED Strip-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[Hot! ! ! Plastic Wire Mesh/Plastic Flat Mesh/Plastic Plain Netting]

Union NPT Bsp BSPT Stainless Steel Pipe Fittings,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[Pod Style Doval Vape Pen battery 170mAh Vape Pod 0.5ml Electronic Cigarette Without E Liquid Vape Batteries]

Union NPT Bsp BSPT Stainless Steel Pipe Fittings, 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:Marine Anemometer / Wind Meter/ Anemoscope with Alarm Function for Vessel/Ship, Part I.2019 Hot Sale High Quality Chinese Factory Direct Supplied Heavy Duty 3-200ton Electric Winch. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[Low Noise Ventilating Blower Fan for Agriculture]

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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[Galvanized Diamond Wire Mesh/PVC Coated Chain Link Fence]

Whitaker,J.R.(1963),Gaogong Group Gypsum Rotary Dryer From Manufacturer Competitive Price. Analytical Chemistry35(12), 1950-1953[Ball Mill]

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

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