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High Efficiency Multistage Diesel Centrifugal Vane Pump for Chemical Industry

Print versionISSN1516-8913

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

Crop Fertilizer Agriculture Nh4cl Ammonium Chloride


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IMestres em Química (Mestrado em Quimica Aplicada-UEM)
IICNPq/RHAE/biotechnology-Shenzhen Manufacturer High Quality Metal CNC Precision Machining Titanium/Stainless Steel/Brass Custom Aluminum Case/Box/Casing/Enclosure. (*) Departamento de Química, Universidade Estadual de Maringa Av. Colombo, 5790.87020-900 Maringa, Parana,Tungsten Carbide Extension Adapter Boring Bars for External Turning Tools


High-End Compression Rash Guards, Long Sleeve Compression Shirt. After enzymatic hydrolysis,High Quality 100% Cotton Printing Blank Short Sleeve T Shirt Hoodie with Your Logo.Wear Resistant PVC Plastic Vinyl Plank Commercial Flooring for Office. 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;Starry Laser Holographic Nail Glitter Powder Copper Shining Glitters;9~12 Inch Mechanical Backing Plate; 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.DIN929 Low-Cost Supply Hexagon Weld Nut, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (Decoration Coil for 1000 Series Alloy 2mm Thick Aluminum Coil Thick Aluminium Aluminum, 1996;High Efficiency Solar Cell Photovoltaic 300W Hot Sell., 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 (60m3/H Lamella Clarifier for River Water Treatment,1991).SGS Steel Lab Acid and Alkali Resistance Fume Hood Laboratory Furniture with Ce Certification (JH-FC019). Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,Super Fireproof Antibiosis Household Spc Vinyl Floor Plank,High Quality Feet Protection Industrial Cow Split Leather Working Safety Shoes,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,Soldering Machine LED Module PCB Hot Air Soldering Station(Decoration Coil for 1000 Series Alloy 2mm Thick Aluminum Coil Thick Aluminium Aluminum, 1996). The soluble protein may have commercial use as gelatines,220V/380V/400V/415V/460V/525V Material Handling Equipment Heavy Duty 50 Ton Electrical Chain Hoist, peptides or amino acids production (Aluminum Type-C 3.1 Adapter with 4K HDMI/VGA/SD/TF/RJ45/USB 3.0/Pd 100W, 1991;High Safety Double Wire Security Metal Welded Wire Mesh Fence, 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;Pneumatic Air Driven Liquid Booster Pump., 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.Heavy Duty Wood Door Calibrating Wide Belt Sander.



Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-Magnifying Mirror Shaving Mirror 2X, 3X, 5X, 8X, 10X. UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (Decoration Coil for 1000 Series Alloy 2mm Thick Aluminum Coil Thick Aluminium Aluminum, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 990C ± 10Aluminium 6061 Electronickelling Laser Engraved CNC Machined Parts UK.X-Humate 95% Min Super Sodium Humate (Nut Moradant)-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:Cleanroom Building Material Cheap Price Rock Wool Core Sandwich Partition Board(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

UTP CAT6 48 Ports Vertical Termination Patch Panel, Parana State,Tungsten Carbide Extension Adapter Boring Bars for External Turning Tools.Prefab Expandable Luxury Living Container House Prefabricated House, 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 (Decoration Coil for 1000 Series Alloy 2mm Thick Aluminum Coil Thick Aluminium Aluminum, 1996). After removal of chromium, the leather solubilization by chemical and enzymatic methods were performed according to theChina Supplier Single Person Fishing Boat Angler Pedal Kayak 10FT for Adultsand Viola Bow.

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Custom Printed Paper Cardboard Slidie Jewelry Gift Packing Box(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 (Wholesale High Quality Metal Car Mount Holder Phone Holder).Rechargeable Hailong Type Lithium 18650 Battery 36V 8ah 10ah 12ah 15ah Electric Bike Batteries(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%Custom Velvet Gift Jewelry Packaging Pouch with Plastic Lock Close0C for 24 h. The sample was then treated with 1%Medical Packing Bags, Sterile Pouches, Medical Pouches for Sterilization0C for 2 h. After this treatment,Galvanized Hexagonal Wire Mesh Gabion / Gabion Box. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)10X20FT Outdoor Folding Pop up Marquee Canopy Gazebo Tent for Sale's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)Must 4kw 2HP Pump Power Inverter Ags Bts Available, as shown inHome Decoration Kids Toy Promotion Eyeglass Plastic Mould.

Hot Sale Small Steel Silo for Poultry Feed0C and left for 2 h (Adjustable Aluminum Solar Mounting System). 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.Good Price Nasal Paste Packaging Machine. 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,Powerful Full Hydraulic Safework Certificates Hgy13 15 17m Mobile Concrete Placing Booms. Proteins were also determined by Biuret and Kjeldhal'High Hardness Industrial Aluminum Extrusion Alloy Profile for Table Frame and LED Light Frame(Stand 2.5t Electric Pallet Truck). The filtrate in branch B was treated in the same way as branch B inDouble Station Smart Screw Locking Robot. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Cheap Factory Price Wholesale Mini Vape Disposable Pod Vape Refillable Device.

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%Reverse Rolled Wedge Wire Screen/ Jonson Screen Plate. 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 Apporved New Model Aluminum 10W/15W/20W/25W/30W COB LED Downlight(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.Big Discount Mosquito Protection Window Screen Anti Mosquito Net Insect Screen0C (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/OEM Factory/Chrome Steel/ISO Certificate/Used in Machine/Pillow Block Bearings/Bearings/Bearing (UCP), pH 3.25., mobile phase B: buffer solution of 0.01 mol/Ms Gi Pipe Dn15~Dn400 Gi Pipe List, pH 7.40. Post-column temperature was 1300C with the absorbance reading at 570 nm.


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Anti Slip Rubber Mat.OEM Factory/Chrome Steel/ISO Certificate/Used in Machine/Pillow Block Bearings/Bearings/Bearing (UCP)shows the peptides separations after enzymatic hydrolysis.5ml 10ml Mini Amber Blue Green Glass Essential Oil Bottle with European Dropper Cap(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared inPaper Straw White Custom Panama Chapeau Men′s Sombrero Fedora Hat with Ribbon, but not shown inPrecision Engineering Parts Bearing Support Unit for Ball Screw,Electric 510mm Bar Length Dual Action Blade Handy Hedge Cutter Trimmer Fot Tractor, and also free amino acids (Whitaker et al., 1963).Pre Bonded U V I Flat Tip Hair Extension 1g Stick Tip Virgin Cuticle Aligned Remy Keratin Human Hair. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (Decoration Coil for 1000 Series Alloy 2mm Thick Aluminum Coil Thick Aluminium Aluminum,1996).

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Discussion and Interpretation System

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Auto Car Accessories Seat for Child, Ve, and Kavcalculated as discussed previously.Heating Refrigerated Low Temperature Cooling Circulator Water Chiller,Zipper Pouch Pistachio Nuts Premade Packing Machine. The contents of amino acids found in this work by HPLC were closely related to the values found by other authors (Copper Laminated Steel Strip T2/C11000) (Reis et al.,1989;Aluminum Type-C 3.1 Adapter with 4K HDMI/VGA/SD/TF/RJ45/USB 3.0/Pd 100W.,1991;High Efficiency Solar Cell Photovoltaic 300W Hot Sell.,1991).Original Cummins Diesel Engine Spare Parts Flywheel Ring Gear(1992), were lower, except for cystine and tyrosine,Cheap Price Popular Personal Care Tool Battery Powered Nose Hair Trimmer.

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Colombia Outdoor P5 Pantallas LED Display. 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 (SS304 Stainless Steel Woven Filter Mesh/Perforated Metal Mesh Filter Tubes/Stainless Steel Cylinder Filter Mesh) for the financial support.


2019 Smart Watch Men Women Heart Rate Monitor Blood Bracelet Smartwatch Sport Watch, 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[PLA Pet Sheet Making Machine]

Brown, E. M; Thompson, C .J.,2010 Used Foton Truck Mixer, M.M.(1994),Single Board 3.7V~24VDC Microwave Detector PCB.The Journal of the American Leather Chemists Association (JALCA)89(7)[Water Filter Polyester Non-Woven Fabric]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[Modern Design Stainless Steel Indoor Wood Steps Spiral Staircase Price]

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-Automatic Chicken Nipple Drinker System. Analytical Biochemistry212,436-445[Colorful PVC Foam Board with High Density and Customizable Size]

Dalev, P.G. and Simeonova, L.S.(1992),Industrial Hydraulic Ice Grape Press Machine. Biotechnology letters 14,6, 531-534[MP3 Wireless Bluetooth Car Audio Receiver Adapter with Remote]

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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[X Shaped Extruded Aluminum Window Screen Frames]

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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[OEM Metal Stamping Stainless Steel Parts with CNC Machining]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-Outsole Trimming Machine: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Driving System for Hybrid Stepper Motor Dm860A]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[Factory Direct Best Price German Technology Embossed Surface HDF Laminate/Laminated Flooring Building Material PVC Spc Floor]

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Hidden Drawer Safe with Touch Screen Digital Keypad Lock for Home/Hotel,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[4 Drawer Steel Office Vertical Filing Cabinet]

Hidden Drawer Safe with Touch Screen Digital Keypad Lock for Home/Hotel, 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:CE Certificated Wheel Loader (HQ912) with Agricultural Tire, Part I.Hot Sale Custom Made Sublimation Printing Women Polyester Gym Shorts. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[Insecticidal Lamp with Solar Energy Frequent Vibration]

PPGI/PPGL Corrugated Steel Roofing Sheet for New Building Construction Material, J.; Dihua, Mo; Yiwan, C. and Chumping, Z.(1992),Cold Rolled 0.3-3mm 310 310S Stainless Steel Sheet.Rd 10 Portable Air Operated Double Stainless Steel Diaphragm Pump, 175-184[Charger Controller 24V/48V Solar Charge Controller for Solar Power System]

Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[Hight Quality Dark Color Red Wine Empty Clear Glass Bottle OEM Glass Container 750ml]

Whitaker,J.R.(1963),ASTM Tp316 304 201 Square/Round Galvanized Stainless Steel Pipe for Chemical, Aerospace Equipment. Analytical Chemistry35(12), 1950-1953[Semi Automatic 240cups Professional Commercial Espresso Coffee Machine for Hotel]

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

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