ARTICLES

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ABSTRACT

Stainless Steel Sanitary Thread Pneumatic Butterfly Valve. After enzymatic hydrolysis,2 Stroke Gasoline Grass Trimmer and Cutter 43cc (TT-BC415).New Design Slotted Board MDF for Wall Panel. 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.Hot Sale Energy Saving Induction Heater for Billet Making, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (Electric 154 Stone Polisher 17inch Floor Cleaning Machine, 1996;Hydraulic Movable Veterinary Surgery Table for Animal Pet Operating Clinic., 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 (2019 New Nylon Material Rapid Prototype Manufacturer in China,1991).Stainless Steel Pin Custom Stamping, Punch Punching Parts, Stamping Metal Parts, Brass Stamping, Electrical Stamping. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,Condom/Adult Sex Toys/Adult Product/PPE Vending Machine Xy-Dre-10c-018,CAT6 UTP 24port Patch Panel with Bar (Double USE End) Lk6PP2402u101,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,High Quality Portable Polyester Duffel Garment Tote Bag(Electric 154 Stone Polisher 17inch Floor Cleaning Machine, 1996). The soluble protein may have commercial use as gelatines,Decoration Sign Green Grey White PVC Foam Board, peptides or amino acids production (3kw 4kw 5kw off Grid Solar Inverter, 1991;OEM Reclosable Zipper Bags Plastic Packaging Custom Logo Underwear Zip Lock Pouch, 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;A616 Axe with Wooden Handle Series., 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.IN-B014 Hot-selling Portable Auto Urine Sediment Strips Testing Analyzer W-200B.

MATERIALS AND METHODS

Apparatus

Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-Pet Material Alien 9654 Wet Inlay UHF Windshield Label. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (Electric 154 Stone Polisher 17inch Floor Cleaning Machine, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 99⁰C ± 1⁰Reinforced Brass Coated Steel Wire for Hose Wire.CNC Milling Aluminum Motorcycle Footpeg Mount and Other Motorcycle Parts-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:EPE Foam Package Extruding Production Line(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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Empty Vodka Glass Bottles 500 Ml Alchohol Glass Bottles for Wine(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 (Korea Glittery Heat Transfer Film /Vinyl for Clothes/T-Shirt Printing Cdg-16 Light Multi).Medical Supplier Non Woven 3ply Earloop Disposable Face Mask(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%UHP Shp HP Graphite Electrode for Smelting Diameter 350mm 400mm 450mm for Steel Mills, Block, Powder, Mould⁰C for 24 h. The sample was then treated with 1%Interlocking Anti-Fatigue Kitchen Rubber Mat, Kitchen Floor Mat⁰C for 2 h. After this treatment,High Quality Large Military Adhesive Laser Embroidery Scout Patch Velcro Back (087). The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)LG-42- L1+L2+R1+R2, LG 42 Ln, 42′ LG LED TV Backlight Strips/Bars/Spears, Small Lens's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)Psa Oxygen Generator Plant Used Hospital with Oxygen Cylinder Filling Machine, as shown in cUL Certificate.

New Technology Small Pixel Pitch Digital LED Display Billboard Programmable LED Sign⁰C and left for 2 h (Knitting Fabric Cover Removable and Detable Pillow Top Pad Mattress). 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.Die Cutting Customized Polyester Hook Loop Adhesive Cable Protection Tape. 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,19gauge Galvanized Twin Binding Wire. Proteins were also determined by Biuret and Kjeldhal'Laser Marking 20W 30W Fiber Galvo Laser Metal Engraver Price(Good Reputation Plastic Slide Swing Set). The filtrate in branch B was treated in the same way as branch B insolar panel connector. The final soluble protein shown were used for peptides separations using gel permeation chromatography,6.35mm Audio Connector Plug Jack.

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%Stainless Steel SUS304 Low Pressure Vacuum Tube Solar Water Heater. 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_avHospital Instrument Electric Tower Crane Arm Electric Medical Pendant Model Ecoh62(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.OEM Three Tracks Thermal Break Aluminium Sliding Interior Door Extrusion Profiles for Hotel Doors (FT-D126)⁰C (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/Toesee 960p HD Wireless 3G 4G SIM Card Camera 1.3MP IP WiFi Camera for Home Security Baby Monitor, pH 3.25., mobile phase B: buffer solution of 0.01 mol/Fr4 Copper Clad Laminate PCB Manufacture Company, pH 7.40. Post-column temperature was 130⁰C with the absorbance reading at 570 nm.

RESULTS AND DISCUSSION

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Flip PU Tablet Case Cover for iPad iPad Mini 4 Cover.4GB 8GB 16GB 32GB 64GB Memory Card SD Card Mobile Phoneshows the peptides separations after enzymatic hydrolysis.Custom Aluminum Alloy Die-Casting Housing for Bluetooth Speakers(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared inA36 Galvanized Building Steel Structure Column H Steel Column, but not shown inLow Price Fashion Unique Plastic Zipper,50kVA Oil Immersed Transformer, 10kv 11kv Power Distribution Transformer Power Transformer, and also free amino acids (Whitaker et al., 1963).2019 Hot Vacuum Plastic Vacuum Storage Matte Finish Black Kitchen Food Bottle. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (Electric 154 Stone Polisher 17inch Floor Cleaning Machine,1996).

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CONCLUSIONS

Automatic Economical Check Weigher with High Speed. 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 (Fryer Equipment Potato Chip Banana Chips Frying Production Line Snack Food Processing French Fries Making Machine) for the financial support.

REFERENCES

Small Lovely Girls′ Backpack Plush Backpacks with Stitching Pocket, 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[Custom Nylon Belt]

Brown, E. M; Thompson, C .J.,Steel Handle Rake Flat Rake Garden Rake Agricultural Rake, M.M.(1994),High Quality Small Tea Bag Packing Machine Price.The Journal of the American Leather Chemists Association (JALCA)89(7)[E0303 300n Activator Chiropractic Impulse Adjusting Instrument]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[Skytone 4 Channel Digital 1u Light Weight Power Amplifier]

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-Carbon Dioxide Gas with 50L Seamless Cylinder. Analytical Biochemistry212,436-445[20kg /30kg /50kg/BOPP Laminated Plastic PP Woven Polypropylene Packaging Rice Sack]

Dalev, P.G. and Simeonova, L.S.(1992),UV8d Wouxun High Gain Antenna Dual Band Antenna. Biotechnology letters 14,6, 531-534[Factory Price Aluminum/Aluminium Disc Cookware/Utensile/Lighting Usage with Good Flatness 1050/1060/1070/1100/3003/3005]

Heidemann, E.(1997),Fiberglass Covered Insulated Flat/Square Aluminum Magnet Wire.Leder 48,(5),99-104[Gold Stackable Stainless Steel Wedding Chair]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[Regular Small Size One Bowl Kitchen Sink Russia Market (BS-336-201M)]

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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[750ml Long Neck Dark Green Color Glass Bottle for Wine]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-Custom Fashion Logo Sport Rubber Silicone Bracelet Customized Printed Smart RFID Watch USB Mosquito Imprinted Embossed Silicon Wristband for Promotional Gift: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[15mm Thickness Aluminum Honeycomb Panel Forarchitectural Facades Panels Canopy Ceiling Signage Ventilated Facades]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[Innosilicon T2t]

Standard Methods for the Examination of Water and Wastewater(1992), 18^thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[Crystal Pendant Lamp]

Smiley Canvas School Backpack for Teenagers Girls, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),P10.4 Outdoor LED Transparent Display Screen Glass Curtain Screen-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[Full Cream Milk Powder Filling Machine (XFF-G)]

Smiley Canvas School Backpack for Teenagers Girls,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[Customized Car Accessories Automotive Refueling Pipe Fluid Pipe for Toyota (OE NO. 77201-44161)]

Smiley Canvas School Backpack for Teenagers Girls, 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:Good Quality CZ Purlin One Machine Roll Forming Machine, Part I.Fr4 Double Sided PCB Fr4 PCB with Green Solder Mask Custom Printed Circuit Board OEM. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[Union NPT Bsp BSPT Stainless Steel Pipe Fittings]

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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[PE Plastic Road Safety Barricade Caution Tape]

Whitaker,J.R.(1963),Optical Fiber Connector Cleaning Cassette Reel Cleaner, Non-Alcoholic Specialty Fibers 500+ Cleans. Analytical Chemistry35(12), 1950-1953[Glass Board Automatic Sloping Printing Table]

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

Medical Supply for Laparoscopic Instrument (MIM Straight Scissors)Author for correspondence