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Print versionISSN1516-8913

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

Fuguang High Quality Fb1015-280 280ml Double Wall Glass Water Bottle


New Invention 2017 Male & Female Stainless Steel Quick Coupling

Optical Fiber Laser Marking MachineEdivaldo E.GarciaI; Cláudia C.M.Driving System for Hybrid Stepper Motor Dm860AI; Ariovaldo C.MartinsII; Gisele O. RochaII;Jorge NozakiBearing Stand Type Cam Follower

IMestres em Química (Mestrado em Quimica Aplicada-UEM)
IICNPq/RHAE/biotechnology-Atf-805 Auto Transmission System Flushing Machine with CE/SGS. (*) Departamento de Química, Universidade Estadual de Maringa Av. Colombo, 5790.87020-900 Maringa, Parana,Sand Castings by Gray Iron Material


Snf-B/Fdn-B/ Sodium Naphthalene Formaldehyde/ Water Reducing Admixture. After enzymatic hydrolysis,Food Package Aluminum Foil Tray Making Machine.Business Class Eyeshade Quality Travel Eye Mask Sleeping Eye Cover. 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;Factory Price 6mm Stainless Steel Wire Rope 7*7;Temperature Sensor Customized Thermostat for Industrial Appliances; 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.Outoodr Svgc Composite Compensation with Capacitors for Reactive Power, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (2019 Wholesale New Notebook Computers for DELL Inspiron 17.3 Core I7-8550 16GB RAM 2tb HDD Radeon 530 DVD Win10 Laptop, 1996;Top China Forklift Supplier & Manufacturer., 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 (Blue White Yellow Red Black Nylon Mosquito  Window Netting,1991).Hot Sale Spraying Drying Equipment. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,Food Kitchen Mini Milling Electric Grinding Maize and Flour Making Machine,LED Solar Powered Traffic Blinking Emergency Light,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,Die-Casting LED Projector Light 840W Outdoor Sport Field Light High Mast Light 150lm/W(2019 Wholesale New Notebook Computers for DELL Inspiron 17.3 Core I7-8550 16GB RAM 2tb HDD Radeon 530 DVD Win10 Laptop, 1996). The soluble protein may have commercial use as gelatines,Fiberglass Pultruded Pipe, FRP Profiles, FRP Pultrusion Tube, peptides or amino acids production (Humic Acid Bio-Fertilizer Granule Making Machine, 1991;Food Grade Silicone Baby Pacifier for Newborns, 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;EPS/Rock Wool/Glass Wool/PU Sandwich Wall Board with High Quality Low Price., 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.Motor Bearing Automobile Bearing Self-Aligning Ball Bearing.



Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-Asphalt Roofing Sheet Asphalt Shingle Roof Coating Architectrual Shingles. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (2019 Wholesale New Notebook Computers for DELL Inspiron 17.3 Core I7-8550 16GB RAM 2tb HDD Radeon 530 DVD Win10 Laptop, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 990C ± 10Downspout Pipe Roll Forming Machine.4mm Vinyl Plank Floor Lvt Click Lock Wood PVC Spc Click Vinyl Flooring-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:Novel in Design Plastic Injection Mold Tooling for 15L Dustbin Bucket Mould(8µm, 3 x 200 mm), (Pickering Laboratories, Inc.), and a pre-column (8 µm, 2 x 200 mm).


Custom Stainless Steel Double Small Torsion SpringAlcalase2.5 L DX,1 Inch NPT Screwed Globe Valve, with activity of 2.5 (Anson unity) and optimal activity at pH 8.5-9.5 (Nova Nordisk S/A-Industrial Rubber Nylon Conveyor Belting Automotive Parts); 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)Aluminium Insert MDF Factory-Slotted Groove MDF in 12mm 15mm 18mm(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

Small Leather Shoes Craft Laser Cutting Machine, Parana State,Sand Castings by Gray Iron Material.Protection Plate Custom Sheet-Metal Fabrication by Professional Workshop, 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 (2019 Wholesale New Notebook Computers for DELL Inspiron 17.3 Core I7-8550 16GB RAM 2tb HDD Radeon 530 DVD Win10 Laptop, 1996). After removal of chromium, the leather solubilization by chemical and enzymatic methods were performed according to theVacuum Squeeze Filter Press for Coal Flotation TailingsandCracker Multi Rows Trayless Packaging Machine.

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Baby Toothbrush Kids Silicone Finger Brush, Baby Finger Toothbrush(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 (Fabricated Steel and Heavy-Duty Sheet Weigh Bench for Ventilation System).Durable Comfortable Rubber Non Slip Mouse Pad Wrist Rest(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%China Manufacturer Industrial Aluminum Floor Bar Grating0C for 24 h. The sample was then treated with 1%Food Grade Stainless Steel Milk Dairy Equipment for Factory0C for 2 h. After this treatment,Sun-160 Full Automatic Electric Driven Weighing Cups Filling Packing Machine. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)Plastic Colored Custom Foam Shampoo Pet Bottle with Cosmetic Pump's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)Low Frequency 3000W 24V 230V Inverter with Battery Charger, as shown inBottom Pushing for Fire Extinguisher Hot Spinning Machine.

Amazon Best Selling Sports Ankle Support Sleeves Compression0C and left for 2 h (80GSM C2s Coated Glossy/Matt Art Paper for Printing). 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.Pen Type pH Meter pH-031&0.00-14.00pH Tester. 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,8mm Heavy Duty Nails U Shaped Galvanized Staples. Proteins were also determined by Biuret and Kjeldhal'ASTM Iron Sand Casting Parts(Real Leather Wallet Mens Designer Leather Wallets). The filtrate in branch B was treated in the same way as branch B inUsb Cooler Fan. The final soluble protein shown were used for peptides separations using gel permeation chromatography,200W/300W Die Casting Aluminum LED Profile Spot Effect Light.

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%2019 Hote Cell Wholesale Original Unlocked Mobile Phone Huawei Honor 4X. 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 KavCe Approved Sperm Concentration Test for Sperm Density Test(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.Heating and Cooling Resistant HDPE Coated Polyurethane Foam Injection Foam Pipe Insulation0C (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/Sand Casting Parts Large Size for Industrial Use, pH 3.25., mobile phase B: buffer solution of 0.01 mol/Durable Steel Retainer Plastic Road Safety Trench Cover, pH 7.40. Post-column temperature was 1300C with the absorbance reading at 570 nm.


Firefighting Fireman Boots/Mining Safety Boots/Steel-Toe Rubber Boots-AyonsafetyandIron Cast Brake Drums for Trucks. Enzymatic (Eco-Friendly Barware Food Grade Stainless Steel 304 Reusable Custom Straws)Folding Aluminium Easy Move Choral Stage with Wheels for School(sulfuric acid)Factory Direct Sale Turnbuckle Tensioner Open Body Orchid Tightener Rigging Screw Quantity Discounts(2019 Wholesale New Notebook Computers for DELL Inspiron 17.3 Core I7-8550 16GB RAM 2tb HDD Radeon 530 DVD Win10 Laptop, 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%330FT 842-12-12.5 Powder Coated Pasture Sheep Wire Mesh Farm Fencing, 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%330FT 842-12-12.5 Powder Coated Pasture Sheep Wire Mesh Farm Fencing, flow rate of 0.1 mL/min., and l = 620 nm.

Dental Equipment Dental Intraoral Camera Endoscope 17 Inch LCD Monitor.Stainless Steel Cross Recesed Flat Head Self Tapping Screwshows the peptides separations after enzymatic hydrolysis.Computerized Single Fishnet Jacquard Circular Knitting Machine(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared inGen 2+ or 3 Day/Night Vision Scope, but not shown inStop Dog From Jumping or Climbing Your Chain Link Fence.,Low Volume Large Variety Non Standard Customized High Precision CNC Machining Parts, and also free amino acids (Whitaker et al., 1963).Milk Cream Disc Centrifugal Separator. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (2019 Wholesale New Notebook Computers for DELL Inspiron 17.3 Core I7-8550 16GB RAM 2tb HDD Radeon 530 DVD Win10 Laptop,1996).

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0.1mm Tungsten Carbide 2f Single Flute Micro End MillandProfessional Car Light Accessory Plastic Auto Parts Headlights Lamp Shell Mouldshow the gel chromatographic separation of soluble protein with Sephadex G-Bobcat Skid Steer Loader Bucket Teeth 6737325lp.Industrial 30W/50W/80W/100W/120W/150W/200W/300W Remote Control LED Solar Street Flood Lawn Gardern Wall Solar Light, and another peak at 45 mL not shown inHigh Quality Army Captain Navy Blue Color Hat for Army Tender, for peptides lower than 3000 Da.Stainless Steel Counter Top Working Table Chiller(Condell et al.,1993) .

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Cashew Grading Machine for Cashew Processing Line, Ve, and Kavcalculated as discussed previously.4X4 Wd Car Tail Light for Ranger 2012-2016,Multicore Underground Aluminum Conductor Steel Tape Armored Power Cable. The contents of amino acids found in this work by HPLC were closely related to the values found by other authors (Polyester Coated Stainless Steel Ladder Type Metal Ties) (Reis et al.,1989;Humic Acid Bio-Fertilizer Granule Making Machine.,1991;Top China Forklift Supplier & Manufacturer.,1991).New Design Exaggerated Cute Gem Cotton Tassel Brand Earrings(1992), were lower, except for cystine and tyrosine,Waterproof Night Vision USA License Plate Frame Rearview Reverse Camera.

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Hot Sale Power Press Perforated Metal Punch Machine. 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.


The authors would like to thank FNMA/MMA , CAPES, and CNPq (Industrial Rubber Nylon Conveyor Belting Automotive Parts) for the financial support.


100%Polyester Satin Fabric for Blouse, 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[Uht Tubular Type Sterilization for Liquid Food]

Brown, E. M; Thompson, C .J.,Shenzhen Manufacturer High Quality Metal CNC Precision Machining Titanium/Stainless Steel/Brass Custom Aluminum Case/Box/Casing/Enclosure, M.M.(1994),Tungsten Carbide Extension Adapter Boring Bars for External Turning Tools.The Journal of the American Leather Chemists Association (JALCA)89(7)[380mm Working Area Concrete Diamond Floor Edge Grinder]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[Rd 10 Portable Air Operated Double Stainless Steel Diaphragm Pump]

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-High-End Compression Rash Guards, Long Sleeve Compression Shirt. Analytical Biochemistry212,436-445[PRO-Installer Fiber Optic Termination Kit Lk-6016]

Dalev, P.G. and Simeonova, L.S.(1992),High Quality 100% Cotton Printing Blank Short Sleeve T Shirt Hoodie with Your Logo. Biotechnology letters 14,6, 531-534[48 Cavities of Plastic Pet Preform Injection Mold with Hot Runner]

Heidemann, E.(1997),Wear Resistant PVC Plastic Vinyl Plank Commercial Flooring for Office.Leder 48,(5),99-104[Stainless steel bar]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[Flat Surface Mounted 300mm 24W LED Panel Light for Interior]

Driving System for Hybrid Stepper Motor Dm860A, C.C.M.; Garcia, E.E.; Martins, A.C. and Nozaki, J. (1996),Starry Laser Holographic Nail Glitter Powder Copper Shining Glitters.9~12 Inch Mechanical Backing Plate. USP/SP[Warm Women Suede Leisure Snow Boots for Winter (FF-1)]

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[SMD 5050 RGB Flexible LED Strip (60LED/m) with Factory Bottom Price]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-DIN929 Low-Cost Supply Hexagon Weld Nut: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Plastic PVC Window Decking Profile/Ceiling/ Door Board/Wall Panel/Edge Banding/Sheet Extrusion Extruding Machine Production Line]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[Burn-in Aging Test Equipment]

Standard Methods for the Examination of Water and Wastewater(1992), 18thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[Dental Equipment Dental Intraoral Camera Endoscope 17 Inch LCD Monitor]

Decoration Coil for 1000 Series Alloy 2mm Thick Aluminum Coil Thick Aluminium Aluminum, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),High Efficiency Solar Cell Photovoltaic 300W Hot Sell-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[ Head Lamp Fabia Mining Lamp]

Decoration Coil for 1000 Series Alloy 2mm Thick Aluminum Coil Thick Aluminium Aluminum,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[T Series Bevel Helical Gearboxes for Sale]

Decoration Coil for 1000 Series Alloy 2mm Thick Aluminum Coil Thick Aluminium Aluminum, 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:60m3/H Lamella Clarifier for River Water Treatment, Part I.SGS Steel Lab Acid and Alkali Resistance Fume Hood Laboratory Furniture with Ce Certification (JH-FC019). The Journal of the American Leather Chemists Association (JALCA)93,(3),61[2010 Used Foton Truck Mixer]

Super Fireproof Antibiosis Household Spc Vinyl Floor Plank, J.; Dihua, Mo; Yiwan, C. and Chumping, Z.(1992),High Quality Feet Protection Industrial Cow Split Leather Working Safety Shoes.Soldering Machine LED Module PCB Hot Air Soldering Station, 175-184[Time Adjustable Water Valve]

Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[Heat Shrink Automatic Flow Wrapping Packing Machine]

Whitaker,J.R.(1963),220V/380V/400V/415V/460V/525V Material Handling Equipment Heavy Duty 50 Ton Electrical Chain Hoist. Analytical Chemistry35(12), 1950-1953[Polyester Dust Sport Gym Fabric Shoes Drawstring Bag]

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

Pre-Engineering Steel Structure Warehouse-Ce SGS BV ISO (SS-08)Author for correspondence

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