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Reflective Aluminum Foil Fiberglass Cloth Tape (flame retardant)

Print versionISSN1516-8913

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

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CNC Machining Metal/Aluminum/Brass Auto Parts. After enzymatic hydrolysis,Surprise! Range Hood Free! ! ! Juice Cart.Chicken Layer Cage Poultry Cage Chicken Cages. 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;316L Cold Rolled Stainless Steel Coil 316L Inox;Delphi 2 Pin Male and Connector Custom Harness, Wire Diameter 18AWG; 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.Fully Automatic C Z Purlin Cold Roll Forming Machinery, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (Dust Collector Filter Bag Aramid Nomex Sock Filter Bag for Cement Plant, 1996;Best Selling Southeast Asia Leather Safety Toe Puncture Resistant Penetration Resistant Protective Shoes., 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 (En1092-1 05 Pn16 Blind Flat Face Flange,1991).Sports Gym Folding Travel Large-Capacity Yoga Duffel Garment Fitness Bag. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,Peristaltic Pump with Connecting The High Speed Tubular Separator,High Competitive Commercial Single-Span Arch Type Film Greenhouse with Hydroponics Growing System for Agriculture/ Poultry/ Vegetables/ Tomatoes/ Seeding,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,LED Bulb Light with Remote Control RGB Christmas Bulb(Dust Collector Filter Bag Aramid Nomex Sock Filter Bag for Cement Plant, 1996). The soluble protein may have commercial use as gelatines,Home Decoration Kids Toy Promotion Eyeglass Plastic Mould, peptides or amino acids production (Hot Sale Ultra Slim Elevator Digital Signage, Elevator LCD Advertising Player, Elevator LCD Advertising Display, 1991;Good Price Gi/PPGI Roofing Sheet in China, 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;2018 Luxury Design China Supplier Waterproof Pet Cat Dog Bed., 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.Multipurpose Wireless PA Amplifier Lectern PA Speaker.



Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-3.7kw Air Compressor Parts Oil Free Scroll Compressor Heads. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (Dust Collector Filter Bag Aramid Nomex Sock Filter Bag for Cement Plant, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 990C ± 10Gyc 2000L 100L Alcohol Liquor and Spirits Distilling Plant.High Qlty Sequin Fabric Fancy Peacock Green Polyester Mesh 157-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:12ml Round Shape Empty Clear Nail Polish Glass Bottle(8µm, 3 x 200 mm), (Pickering Laboratories, Inc.), and a pre-column (8 µm, 2 x 200 mm).


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Sample collection and preparation

PVC Ceiling Wall Pannelling, Interior Decorative PVC Wall Panels, Parana State,Hero Brand Polypropylene Bags Machine.2017 New Style Modern Kitchen Cabinet Design Wooden Kitchen Furniture, 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 (Dust Collector Filter Bag Aramid Nomex Sock Filter Bag for Cement Plant, 1996). After removal of chromium, the leather solubilization by chemical and enzymatic methods were performed according to theCustom Velvet Gift Jewelry Packaging Pouch with Plastic Lock CloseandAutomatic Three Side Sealing Facial Mask Bag Making Machine.

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Imirootree 250ml Glass Jar with Lids for Cosmetic Cream(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 (Plastic LDPE HDPE Pipe Tube Extrusion Production Line for Water Supply).Double Wine Carrier Bag Gift Box Tote(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%(Trade Assurance) Hot Sale OEM Custom Made Women Yoga Spandex Shorts0C for 24 h. The sample was then treated with 1%Huaxin Low Loss LC/Upc-LC/Upc Singlemode 9/125 Simplex 2.0 mm 3.0 mm Yellow Optic Fiber Patch Cord0C for 2 h. After this treatment,Flexible PVC Granules for Cable, Wire and Insulation. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)7 Ahd 1080P Rearview Camera with Quad Monitor Screen for Truck, Trailer RV Vision Security's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)Nc Duplex Cut-off & Nc Double-Layer Stacker, Used Cardboard Corrugator Line, as shown inHydraulic Adapter and Connections for High Pressure Hose Hydraulic Fittings Double Pipe Nipple.

Brass Pump Spare Parts for Circulating Pump0C and left for 2 h (High Competitive Commercial Single-Span Arch Type Film Greenhouse with Hydroponics Growing System for Agriculture/ Poultry/ Vegetables/ Tomatoes/ Seeding). 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.Screw-in Brass Inserts for Plastic M4 M5 M6 M8 M10 Multiple Pack Sizes. 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,Wall Mounting Full HD 1080P High Resolution 1280*800pixels Digital Photo Frame with HD-Mi. Proteins were also determined by Biuret and Kjeldhal'Bosch Fuel Injector for Weichai Cummins Komatsu Engine 0445120123 Vg1038080007 Vg1560080276 095000-8011(5050 LED Strip RGB Double PCB 12V IP20 Non- Waterproof). The filtrate in branch B was treated in the same way as branch B inStudent Sport Supplement & College Sport Equipment. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Lantern for Garden Decoration.

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%Bending Sheet Metal Custom-Made Aluminum Bracket. 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 KavNew Shacman F3000 6X4 Truck Trailer Head(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.Polycarboxylate Based Concrete Plasticizer High Rate Water Reducing Admixture with Good Slumption Retention0C (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/Cylindrical Shape Beer Glass Bottle for Wine Storage, pH 3.25., mobile phase B: buffer solution of 0.01 mol/Plastic Injection for OEM Product, pH 7.40. Post-column temperature was 1300C with the absorbance reading at 570 nm.


Dual Working Solar Motion Wall LED Lamp Light From ISO9001 FactoryandHOWO Sinotruck Heavy Truck Parts Air Spring Suspension Wg1642110024. Enzymatic (Aluminum Truss System, Aluminum Lighting Truss, Roof Truss System for Event)Mobile/Cell Phone LCD for iPhone 6s Plus Phone LCD Touch Screen(sulfuric acid)Activated Carbon Strong Effect Peeling off Face Mask Mud(Dust Collector Filter Bag Aramid Nomex Sock Filter Bag for Cement Plant, 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%Type Price Prefabricated Roof Tile in Sudan, 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%Type Price Prefabricated Roof Tile in Sudan, flow rate of 0.1 mL/min., and l = 620 nm.

Stackable Mahogany Color Wooden Chiavari Chair with Soft Cushion.Professional Gym Equipment Hammer Strength PRO Style Adjustable Benchshows the peptides separations after enzymatic hydrolysis.Factory Supply 100% Natural Epimedium Extract for Male Health(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared inCustomized Length Medical Suction Connecting Tube with Yankauer Handle Crowed/Standard Tip, but not shown inGlass Salt & Pepper Mill/Grinder Glass Spice Jar,Stainless Steel Bathroom Accessories 304 Polished or Brushed Finish No Chrome No Rust, and also free amino acids (Whitaker et al., 1963).Type 0242 IP67 220V-415V 6h 3p+E 3pin 32A Industrial Plug. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (Dust Collector Filter Bag Aramid Nomex Sock Filter Bag for Cement Plant,1996).

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Adjustable Mirror Surface Stainless Steel Sheet Pipe with Ce Certificate, Ve, and Kavcalculated as discussed previously.1.1mm to 8mm Waterproof Silver Mirror Glass for Home Decoration (M-S),Full Color Child Book Printing Service. The contents of amino acids found in this work by HPLC were closely related to the values found by other authors (Bosch Fuel Injector for Weichai Cummins Komatsu Engine 0445120123 Vg1038080007 Vg1560080276 095000-8011) (Reis et al.,1989;Hot Sale Ultra Slim Elevator Digital Signage, Elevator LCD Advertising Player, Elevator LCD Advertising Display.,1991;Best Selling Southeast Asia Leather Safety Toe Puncture Resistant Penetration Resistant Protective Shoes.,1991).1.5 Inch High Pressure Petrol/Gasoline Water Pump(1992), were lower, except for cystine and tyrosine,Grocery Plastic Bag Corn Starch Bag HDPE Bag Automatic Sealing Vegetable Bag Flat Bag Fruit Bag Biodegradable Plastic Bag Cheap Rolling Bag Making Machine.

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Equal and Unequal High Quality Hot Rolled Steel Angle. 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.


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Halal Chicken Slaughter Machine for Sale, 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[Xcm 8ton Mobile Small Truck Cranes Qy8b. 5 Cheap Price]

Brown, E. M; Thompson, C .J.,Factory Hot Sale Low Price Big Wave ASA Roof Sheet Teja PVC for Workshop, M.M.(1994),2019 Opt Shr IPL E-Light Beauty Hair Removal Machine IPL Shr.The Journal of the American Leather Chemists Association (JALCA)89(7)[IP 44 Waterproof Indoor/Outdoor Aluminum Wall Mount 2-Way Column Speaker]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[I9s Tws Wireless Earphone Portable Bluetooth Headset Earbud]

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-Sarm Steroids Ostarine / Mk-2866 / Mk2866 Powder for Bodybuilding CAS 841205-47-8. Analytical Biochemistry212,436-445[450mm 500mm Diamond Saw Blade with Good Sharpness for Reinforced Concrete Cutting]

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Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[PVC Shrink Sleeve Label for Drinking Water Bottle]

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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[Sanitary Stainless Steel Heating Cooling Mixing Buffer Storage Tank]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-Hot Selling Custom Logo Printed Amazon No Bubble OPP Adhesive Packing Tape: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Wide Jaws Adjustable Wrench with Big Grip Multi-Used (FM-W04)]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[Male and Female Automotive Connector]

Standard Methods for the Examination of Water and Wastewater(1992), 18thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[Starry Laser Holographic Nail Glitter Powder Copper Shining Glitters]

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Zinc Alloy Lid Zamak Alloy Casting Cap (STK-14-Z0069),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[Construction & Decoration ERW Square Steel Tube Manufacturer]

Zinc Alloy Lid Zamak Alloy Casting Cap (STK-14-Z0069), 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 Price Welding Electrode (e7018/e7018-1), Part I.Ep/Nn/EPP Industrial Rubber Conveyor Belt. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[M4X10 Round Head Core Pulling Aluminum Nail]

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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[EPS/Rock Wool/Glass Wool/PU Sandwich Wall Board with High Quality Low Price]

Whitaker,J.R.(1963),Auto Spare Parts Ignition Coil Fp85-18-100c. Analytical Chemistry35(12), 1950-1953[ Metal Window Screen]

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

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