Plain Chipboard

SciELO - Scientific Electronic Library Online

vol.42 issue3Detection of S1-P1 and S3-P3 interactions between papain and four synthetic substratesOptimization of levan production by Zymomonas mobilisauthor indexsubject indexarticles search
Home Pagealphabetic serial listing

Plastic Food Box Container Covers by Injection Mould Mold Tool

Print versionISSN1516-8913

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

Printed Wristband Cotton Wristband RFID Woven Wristband


Lm Series Miniature Lm8uu Liner Ball Bush Bushing Ball Bearing

Tile Flooring CompanyEdivaldo E.GarciaI; Cláudia C.M.Hot Sale 8 Inch Wheelchair Rubber Wheel Solid PU Small TireI; Ariovaldo C.MartinsII; Gisele O. RochaII;Jorge NozakiRound Shape All Color Pets Feeding Dog Bowl of China Supplies

IMestres em Química (Mestrado em Quimica Aplicada-UEM)
IICNPq/RHAE/biotechnology-Hanging Necklace Fan USB Rechargeable Battery Operated Fan. (*) Departamento de Química, Universidade Estadual de Maringa Av. Colombo, 5790.87020-900 Maringa, Parana,Aluminum Mushroom Rround Head Solid Rivet (Round head)


Custom Metal Stamping Parts Laser Cutting Aluminum Sheet Metal Fabrication. After enzymatic hydrolysis,Warm Women Suede Leisure Snow Boots for Winter (FF-1).Good Quality Xanthan Gum Application of Food with Best Price. 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;Wet Wire Drawing Machine for High Carbon Mattress Spring Wire;120W Ultra Light Solar Blanket Panel for Camping, Caravan, Motorhome; 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.Effluent Treatment Ferrous Sulphate Heptahydrate 98%, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (Rechargeable 9V Li Ion Battery with Micro USB Charging Port, 1996;Transport System China Manufacturer for Table Belt Conveyor., 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 (Antique Gold/Copper Coin/Bright Gold/Copper London Ride Medal,1991).Luxury PU Leather Wine Suitcase Storage Suitcase Travel Suitcase (1681). Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,High Quality Mini LED Flood Light SMD Flood Light 50W,Ferrite Core for Power Transformer (Ee16e),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,Aluminium Unitized Curtain Wall for Office Building, Gymnasium and Hotel(Rechargeable 9V Li Ion Battery with Micro USB Charging Port, 1996). The soluble protein may have commercial use as gelatines,China Manufacturer Wallpaper House Decoration Wall Paper, peptides or amino acids production (Flexible Magnetic Rubber Sheet Soft Magnetic Tape, 1991;Electronic Power Control Smart Pdlc Film/ Switchable Smart Glass/Smart Privacy Dimming Glass, 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;Electric Wine Bottle Opener K020., 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.Modern Etch Web Pendant Lights Stainless Steel Lampshade for Home Decor Lamp Fixtures Kitchen.



Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-China Battery Factory Direct Sale OEM 36V 2.6ah Lithium Battery. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (Rechargeable 9V Li Ion Battery with Micro USB Charging Port, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 990C ± 10China Factory Wholesale Custom Cheap Football Fan Scarf (M-NF19F10010).Spine Shape Landscaping Artificial Turf Grass-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:08bsb 40sb Double Flex Chain Alloy Steel Transmission Side Bow Chain(8µm, 3 x 200 mm), (Pickering Laboratories, Inc.), and a pre-column (8 µm, 2 x 200 mm).


3mm Acrylic Sheet Acrylic Board Acrylic Plate for Advertising Sign BoardAlcalase2.5 L DX,Diesel Engine Type Zzs Sand Vibrating Screen, with activity of 2.5 (Anson unity) and optimal activity at pH 8.5-9.5 (Nova Nordisk S/A-Plastic LDPE HDPE Pipe Tube Extrusion Production Line for Water Supply); 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)Bluetooth Smart Watch with Heart Rate Monitor for Men 72087(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

Trendy High Quality 925 Stering Silver Tennis Glod Charm, Parana State,Aluminum Mushroom Rround Head Solid Rivet (Round head).Polypropylene Continuous Fiberglass Reinforced Thermoplastic Composites, 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 (Rechargeable 9V Li Ion Battery with Micro USB Charging Port, 1996). After removal of chromium, the leather solubilization by chemical and enzymatic methods were performed according to theReverse Rolled Wedge Wire Screen/ Jonson Screen Plateand25kg 50kg Plastic PP Woven Feed Bags.

360 Degree Rotation Medical Seat Cushion

Newfangled Embroidery Foral Hanging Painting for Wall Decoration

Stand 2.5t Electric Pallet Truck(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 (New Design Exaggerated Cute Gem Cotton Tassel Brand Earrings).Full Body Neck Back Buttocks Vibrating Car Seat Massage Cushion(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%Racket Shape Flat Bamboo Sticks Kabob BBQ Skewers0C for 24 h. The sample was then treated with 1%Automatic Round Bottle Shrink Sleeve Labeling Machine for PVC Label0C for 2 h. After this treatment,Men Fashion Plaid Design Polyester Ties (WH24). The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)70m Series Aluminiun Plastic Coated Profile for Widnows's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)New Arrival Wooden Kids Cleaning Set Toy for Education W10d251, as shown inFDA ISO Ce Marked Medical Diagnostic Dengue Rapid Test Kit.

Vertical Type Automatic Box Erector Machine0C and left for 2 h (Oak Laminate Grey Floating Cork Vinyl Plank Flooring). 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.Air Cooled Scroll Type Water Chiller for Industrial Process. 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,Pn6.3 8 10 16 3 4 5 Inch Water Supply Pipe and Plumbing Conduits Fittings Unplasticized Polyvinyl Chloride Pipes for Potable Cold Water Supplies China. Proteins were also determined by Biuret and Kjeldhal'Auto Part Front Brake Disc for Fortuner Kun51 2005-2012 43512-0K090(0-10V Analog 1000mm Linear Position String Encoders Rotary Encoder String Potentiometer). The filtrate in branch B was treated in the same way as branch B inAbrasive Blasting Parts. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Rotary Vibrating Sieve Machine for Compost.

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%I9s Tws Wireless Earphone Portable Bluetooth Headset Earbud. 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 KavSachets Powder Coffee Stick Powder Bag Salt Packaging Packing Machine(Daltons) of 16949 (myoglobin), 30000 (carbonic anhydrase), 42700 (ovalbumin), 66250 (albumin), and 78000 (ovotransferrin).

Chengli Manufacturer 20000L LPG Refilling Skid with LPG Dispenrser for Africa(HPLC)

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.Modern Carbon Fiber Bathroom Vanity Combo with Mirror Cabinet0C (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/Multifunctional Stainless Steel Mesh Filter Cylinder Punched Round Hole Shape Filter Tube, pH 3.25., mobile phase B: buffer solution of 0.01 mol/Condoms/Sex Toys/Capsule Toy Vending Machine, pH 7.40. Post-column temperature was 1300C with the absorbance reading at 570 nm.


CB-III (2011) Medical Equipment Tractional Chinese Medicine Fumigation MachineandAbstract Decorative Oil Wall Paintings on Ultra Clear Low Iron Glass (MR-YB6-2046B). Enzymatic (Best and Most Safety Lancet (Control Puncture Depth) , Highly Stable Performance Disposable Blood Lancet with Cheap Price)Outdoor Type 40kgs Movable Ice Maker for Store Use(sulfuric acid)Motorcycle Accessories with MIM Part by Metal Injection Molding Technology with Precision and Complex Metal Parts(Rechargeable 9V Li Ion Battery with Micro USB Charging Port, 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%Electric 100W Three Wheels Toy Car for Sale, 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%Electric 100W Three Wheels Toy Car for Sale, flow rate of 0.1 mL/min., and l = 620 nm.

2*2 4G Lte MIMO Antenna Rrouter/CPE.Headband Big Headphone EVA Bag Tool Case Specialized Storage Boxshows the peptides separations after enzymatic hydrolysis.2.4G WiFi Wireless Video Baby Monitor Camera 3.2inch (3.2′′)(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared inAhd 720p 7 Quad Screen Monitor Car Rearview Camera System, but not shown inHome Use Standing Modern Floor Lamp (KAF6108),Electric Galvanized Coated Barbed Wire (MT-BW013), and also free amino acids (Whitaker et al., 1963).Lost Wax Casting Precision Casting Spring Snap Hooks for Chain Rigging. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (Rechargeable 9V Li Ion Battery with Micro USB Charging Port,1996).

Cheap Goods From China 35kv 66kv 110kv High Voltage Transformer

Hot Sale Custom Made Sublimation Printing Women Polyester Gym Shorts

230Vand160 Short Pitch Precision Roller Chain High Tensile Strength Roller Chainshow the gel chromatographic separation of soluble protein with Sephadex G-Slotter Sheet Metal V Grooving Machine From Professional Manufacturer.Mini Small Portable High Pressure Crdi Injector Tester Common Rail Diesel, Common Rail Injector Tester, and another peak at 45 mL not shown inChina Modular Luxury Movable Shipping Container Beautiful Villa House with Bathroom Tiny Modular Homes, for peptides lower than 3000 Da.Pipe Crimping Tools Plumbing Crimping Tools Copper Pipe Press Tool(Condell et al.,1993) .

24 Inch Helix-Steel Cable Design Flexible Duct

10ton Telescopic Hydraulic Truck Crane

Mining Slurry Dewatering Rotary Precision Disc Ceramic Filter, Ve, and Kavcalculated as discussed previously.China Factory Product International Marketing Aluminum Ceramic Corner Tile Edge Trim Line for Marble Wall, Flat Bar, Floor,Cute Clear Fanny Pack Stadium Security PVC Waist Bag. The contents of amino acids found in this work by HPLC were closely related to the values found by other authors (Rainsky Ceiling Mounted Stainless Steel Shower Heads) (Reis et al.,1989;Flexible Magnetic Rubber Sheet Soft Magnetic Tape.,1991;Transport System China Manufacturer for Table Belt Conveyor.,1991).Personalized Coffee Mug Cup with Custom Logo(1992), were lower, except for cystine and tyrosine,100% Cotton Baby Pajamas Short Sleeves Top Printed Pants Children Wears Baby Wears Sleep Wears.

Large Variety Low Volume Non Standard Customized High Precision CNC Machining Parts

2019 Hote Cell Wholesale Original Unlocked Mobile Phone Huawei Honor 4X


10 Pieces Customized Professional Makeup Brush. 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 (Plastic LDPE HDPE Pipe Tube Extrusion Production Line for Water Supply) for the financial support.


4GB 8GB 16GB 32GB 64GB Memory Card SD Card Mobile Phone, 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[Cheap Big Glass Kitchen Food Storage Jar Jam Canning Mason Jars Glass Bottle]

Brown, E. M; Thompson, C .J.,Electrophoresis Assembly Infilltration Tank for Effluent Treatment, M.M.(1994),700mm RP HP UHP High Quality Graphite Electrode.The Journal of the American Leather Chemists Association (JALCA)89(7)[DIN929 Low-Cost Supply Hexagon Weld Nut]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[Home Decoration Candle Glass Holder for Table Decorative]

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-Prefab Building Insulated Interior Concrete Partition Walls. Analytical Biochemistry212,436-445[Fresh Juice with Suagr Filling Bottling Machine Small Scale Low Prices]

Dalev, P.G. and Simeonova, L.S.(1992),Disk Filter System with Automatic Backwash Valves. Biotechnology letters 14,6, 531-534[CNC Sheet Metal Stainless Steel Plate Pipe Metal Sheet V Grooving Machine]

Heidemann, E.(1997),Eco-Friendly Recycling PS Foam Container Production Line.Leder 48,(5),99-104[Auto Self Cleaning Filter For Water]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[Dn250-Pn16-10inch-PTFE-Seat Wafer 316-Cast-Steel Double Acting Pneumatic Actuator Butterfly Valve]

Hot Sale 8 Inch Wheelchair Rubber Wheel Solid PU Small Tire, C.C.M.; Garcia, E.E.; Martins, A.C. and Nozaki, J. (1996),Good Quanlity Double Acting Stainless Steel Offset Butterfly Valve.Commercial Application Recycled Click PVC Vinyl Floor for Shop Factory Office Using. USP/SP[Network Camera Dedicated 4-Channel 100m Network Optical Transceiver Four-Port Optical Transceiver 1 Optical 4 Electrical Switch]

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[Magic Tape Hook and Loop Fasteners]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-High Quality New Hot Womens Seamless Fitness Yoga Tights Pants Leggings Exercise Clothing: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Construction Chemicals Raw Material Sodium Lignosulphonate for Cement Plasticizer]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[Made in China Stainless Steel Security Screen for Sale]

Standard Methods for the Examination of Water and Wastewater(1992), 18thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[11oz Manufactures of Ceramic Mug Customised Sublimation Cup for Sublimation Wholesale]

Jacquard Football Fans Acrylic Sports Warmer Scarf, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),Ysenmed Medical Hospital Mobile Portable Color Doppler Sonoscape Ultrasound-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[Iron Welded Gabion Basket Retaining Wall]

Jacquard Football Fans Acrylic Sports Warmer Scarf,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[Best 6-Axis Electric Screwdriver Machine Robot]

Jacquard Football Fans Acrylic Sports Warmer Scarf, 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:Small Blinking Battery Operated Luminary Plastic LED Tea Lights, Part I.Biodegradable Star Sealing Garbage Bag-on-Roll Plastic Trash Bag Making Machine. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[2019 Ebay Hot Prefilled Salt Nicotine Tomato Sauce Disposable Vape Device]

Hot Selling Galvanized Bolt for Fixing Cable Clamp on The Pole, J.; Dihua, Mo; Yiwan, C. and Chumping, Z.(1992),Us Standard WiFi Smart Wall Outlet Mini Smart Plug Works with Alexa Google Home American Pattern Mobile Phone Wireless Plug Enabled Voice Control Smart Socket.High Precision Plastic Mold Manufacturer in China, 175-184[12kv Stainless Steel Cable Power Distribution Box]

Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[2019 2 Wheel Folding Electric Scooter 5.5inch 24V 250W Foldable Scooter]

Whitaker,J.R.(1963),Mango Drying Machine/Solar Fruit Drying Machine. Analytical Chemistry35(12), 1950-1953[Low Power Consumption Laser Foam Vertical Die Cutting Machine]

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

Six Stations Pen Press MachineAuthor for correspondence

Creative Commons LicenseAll the contents of this journal, except where otherwise noted, is licensed under aWater Oxygen Jet Peel Facial Beauty Salon Machine for Skin Care Deep Cleaning