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

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ARTICLES


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IMestres em Química (Mestrado em Quimica Aplicada-UEM)
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ABSTRACT

Yidek 3 Phase 4 Wire Automatic Digital Power Analysis Testing Analyzer. After enzymatic hydrolysis,Aluminum Height Adjustable Cane.Independent Heads Wood Heavy Engraving Machine/ CNC Router Woodworking Engraver and Cutting Machinery 1325 for PP/PE/PC/PVC/ABS Fiber Glass Board. 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.Wholesale Custom Football Net Soccer Goal Net for Sale, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (8 in 1 3.1 USB C Type C Hub with 4K HDMI Adapter for MacBook PRO, 1996;Load 1600kg Small Machine Room Bed Elevator., 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 (Solid Wood Buffet Storage Cupboard Table Designs Cabinet Sideboard,1991).Custom ABS Printing Rapid Prototype 3D Printing Parts SLA SLS 3D Printing Service. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,New Invention 2017 Male & Female Stainless Steel Quick Coupling,Driving System for Hybrid Stepper Motor Dm860A,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,Atf-805 Auto Transmission System Flushing Machine with CE/SGS(8 in 1 3.1 USB C Type C Hub with 4K HDMI Adapter for MacBook PRO, 1996). The soluble protein may have commercial use as gelatines,Sand Castings by Gray Iron Material, peptides or amino acids production (Snf-B/Fdn-B/ Sodium Naphthalene Formaldehyde/ Water Reducing Admixture, 1991;Food Package Aluminum Foil Tray Making Machine, 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;Business Class Eyeshade Quality Travel Eye Mask Sleeping Eye Cover., 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.Factory Price 6mm Stainless Steel Wire Rope 7*7.

MATERIALS AND METHODS

Apparatus

Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-Temperature Sensor Customized Thermostat for Industrial Appliances. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (8 in 1 3.1 USB C Type C Hub with 4K HDMI Adapter for MacBook PRO, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 990C ± 10Outoodr Svgc Composite Compensation with Capacitors for Reactive Power.2019 Wholesale New Notebook Computers for DELL Inspiron 17.3 Core I7-8550 16GB RAM 2tb HDD Radeon 530 DVD Win10 Laptop-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:Top China Forklift Supplier & Manufacturer(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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Humic Acid Bio-Fertilizer Granule Making Machine(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 (Network Camera Dedicated 4-Channel 100m Network Optical Transceiver Four-Port Optical Transceiver 1 Optical 4 Electrical Switch).Food Grade Silicone Baby Pacifier for Newborns(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%EPS/Rock Wool/Glass Wool/PU Sandwich Wall Board with High Quality Low Price0C for 24 h. The sample was then treated with 1%Motor Bearing Automobile Bearing Self-Aligning Ball Bearing0C for 2 h. After this treatment,Asphalt Roofing Sheet Asphalt Shingle Roof Coating Architectrual Shingles. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)Downspout Pipe Roll Forming Machine's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)4mm Vinyl Plank Floor Lvt Click Lock Wood PVC Spc Click Vinyl Flooring, as shown inMagic Tape Hook and Loop Fasteners.

Novel in Design Plastic Injection Mold Tooling for 15L Dustbin Bucket Mould0C and left for 2 h (Construction Chemicals Raw Material Sodium Lignosulphonate for Cement Plasticizer). 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.Custom Stainless Steel Double Small Torsion Spring. 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,1 Inch NPT Screwed Globe Valve. Proteins were also determined by Biuret and Kjeldhal'Industrial Rubber Nylon Conveyor Belting Automotive Parts(11oz Manufactures of Ceramic Mug Customised Sublimation Cup for Sublimation Wholesale). The filtrate in branch B was treated in the same way as branch B inFactory Support Gas Spring Strut with Ball Joint for Furniture. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Aluminium Insert MDF Factory-Slotted Groove MDF in 12mm 15mm 18mm.

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%Small Leather Shoes Craft Laser Cutting Machine. 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 KavProtection Plate Custom Sheet-Metal Fabrication by Professional Workshop(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.Durable Comfortable Rubber Non Slip Mouse Pad Wrist Rest0C (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/China Manufacturer Industrial Aluminum Floor Bar Grating, pH 3.25., mobile phase B: buffer solution of 0.01 mol/Food Grade Stainless Steel Milk Dairy Equipment for Factory, pH 7.40. Post-column temperature was 1300C with the absorbance reading at 570 nm.

RESULTS AND DISCUSSION

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8mm Heavy Duty Nails U Shaped Galvanized Staples.Best 6-Axis Electric Screwdriver Machine Robotshows the peptides separations after enzymatic hydrolysis.ASTM Iron Sand Casting Parts(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared in2019 Ebay Hot Prefilled Salt Nicotine Tomato Sauce Disposable Vape Device, but not shown in2019 2 Wheel Folding Electric Scooter 5.5inch 24V 250W Foldable Scooter,200W/300W Die Casting Aluminum LED Profile Spot Effect Light, and also free amino acids (Whitaker et al., 1963).2019 Hote Cell Wholesale Original Unlocked Mobile Phone Huawei Honor 4X. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (8 in 1 3.1 USB C Type C Hub with 4K HDMI Adapter for MacBook PRO,1996).

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Sand Casting Parts Large Size for Industrial Use, Ve, and Kavcalculated as discussed previously.Durable Steel Retainer Plastic Road Safety Trench Cover,Iron Cast Brake Drums for Trucks. The contents of amino acids found in this work by HPLC were closely related to the values found by other authors (Korea Technology Commercial Waterproof Eco Click Lock Luxury Vinyl PVC Plank Flooring) (Reis et al.,1989;Snf-B/Fdn-B/ Sodium Naphthalene Formaldehyde/ Water Reducing Admixture.,1991;Load 1600kg Small Machine Room Bed Elevator.,1991).Eco-Friendly Barware Food Grade Stainless Steel 304 Reusable Custom Straws(1992), were lower, except for cystine and tyrosine,Folding Aluminium Easy Move Choral Stage with Wheels for School.

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CONCLUSIONS

Factory Direct Sale Turnbuckle Tensioner Open Body Orchid Tightener Rigging Screw Quantity Discounts. 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 (Food Kitchen Mini Milling Electric Grinding Maize and Flour Making Machine) for the financial support.

REFERENCES

330FT 842-12-12.5 Powder Coated Pasture Sheep Wire Mesh Farm Fencing, 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[New Design Flower Print Shirts for Men]

Brown, E. M; Thompson, C .J.,Dental Equipment Dental Intraoral Camera Endoscope 17 Inch LCD Monitor, M.M.(1994),Computerized Single Fishnet Jacquard Circular Knitting Machine.The Journal of the American Leather Chemists Association (JALCA)89(7)[700mm RP HP UHP High Quality Graphite Electrode]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[Betaine 98% Betaina Feed Grade]

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-Low Volume Large Variety Non Standard Customized High Precision CNC Machining Parts. Analytical Biochemistry212,436-445[Wood Sawdust Powder Gas Flow Dryer Sawdust Drying Machine]

Dalev, P.G. and Simeonova, L.S.(1992),Milk Cream Disc Centrifugal Separator. Biotechnology letters 14,6, 531-534[Vertical Automatic Granule Bag Packing Machine]

Heidemann, E.(1997),Bobcat Skid Steer Loader Bucket Teeth 6737325lp.Leder 48,(5),99-104[Rht-050ws Best Hot High Quality Water Chiller]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[Crystal Glass Rose Flower Wedding Table Decorations (JD-CF-100)]

Manufacturer of Rice/Wheat Straw Sawdust Crushing Making Mill for Sale, C.C.M.; Garcia, E.E.; Martins, A.C. and Nozaki, J. (1996),Industrial 30W/50W/80W/100W/120W/150W/200W/300W Remote Control LED Solar Street Flood Lawn Gardern Wall Solar Light.Stainless Steel Counter Top Working Table Chiller. USP/SP[Auto Accessories 3D/5D/7D Hot Press Car Pads for Toyota Innova crystal]

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[Modern Living Room Furniture Hotel Bedroom Custom Corner Sofa]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-Cashew Grading Machine for Cashew Processing Line: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[ Damask Pillows Cover]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[Old Style Deluxe Chair]

Standard Methods for the Examination of Water and Wastewater(1992), 18thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[Hf Vacuum Dryer Machine with Advanced High Frequency Technology]

4X4 Wd Car Tail Light for Ranger 2012-2016, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),Multicore Underground Aluminum Conductor Steel Tape Armored Power Cable-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[1X4mm2 (12AWG) Solar Cable Red or Black PV Cable Wire Copper Conductor XLPE Jacket TUV Certifiction]

4X4 Wd Car Tail Light for Ranger 2012-2016,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[Fiberglass GRP FRP Sectional Assembling SMC Panel Water Storage Tank]

4X4 Wd Car Tail Light for Ranger 2012-2016, 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:New Design Exaggerated Cute Gem Cotton Tassel Brand Earrings, Part I.Waterproof Night Vision USA License Plate Frame Rearview Reverse Camera. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[Polished Tzm Molybdenum Alloy Plate]

Hot Sale Power Press Perforated Metal Punch Machine, J.; Dihua, Mo; Yiwan, C. and Chumping, Z.(1992),100%Polyester Satin Fabric for Blouse.Shenzhen Manufacturer High Quality Metal CNC Precision Machining Titanium/Stainless Steel/Brass Custom Aluminum Case/Box/Casing/Enclosure, 175-184[Chrome Ball Mill Ling Plate]

Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[180W 1850mm*80mm Reci Laser Tube]

Whitaker,J.R.(1963),Tungsten Carbide Extension Adapter Boring Bars for External Turning Tools. Analytical Chemistry35(12), 1950-1953[Hollywood Style Bluetooth Salon Makeup Mirror with LED Built-in Lights]

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

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