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

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ARTICLES


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ABSTRACT

Cashew Grading Machine for Cashew Processing Line. After enzymatic hydrolysis,4X4 Wd Car Tail Light for Ranger 2012-2016.Multicore Underground Aluminum Conductor Steel Tape Armored Power Cable. 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.Hot Sale Power Press Perforated Metal Punch Machine, about 600 industries produce approximately 22 million leather per year, approximately 10% of total world production (100%Polyester Satin Fabric for Blouse, 1996;Shenzhen Manufacturer High Quality Metal CNC Precision Machining Titanium/Stainless Steel/Brass Custom Aluminum Case/Box/Casing/Enclosure., 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 (Tungsten Carbide Extension Adapter Boring Bars for External Turning Tools,1991).High-End Compression Rash Guards, Long Sleeve Compression Shirt. Various alkalinity-inducing agents such as magnesium oxide, calcium hydroxide,High Quality 100% Cotton Printing Blank Short Sleeve T Shirt Hoodie with Your Logo,Wear Resistant PVC Plastic Vinyl Plank Commercial Flooring for Office,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,Starry Laser Holographic Nail Glitter Powder Copper Shining Glitters(100%Polyester Satin Fabric for Blouse, 1996). The soluble protein may have commercial use as gelatines,9~12 Inch Mechanical Backing Plate, peptides or amino acids production (DIN929 Low-Cost Supply Hexagon Weld Nut, 1991;Decoration Coil for 1000 Series Alloy 2mm Thick Aluminum Coil Thick Aluminium Aluminum, 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;High Efficiency Solar Cell Photovoltaic 300W Hot Sell., 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.60m3/H Lamella Clarifier for River Water Treatment.

MATERIALS AND METHODS

Apparatus

Atomic absorption spectrometer CG-AA-7000-ABC (AAS), with an air-SGS Steel Lab Acid and Alkali Resistance Fume Hood Laboratory Furniture with Ce Certification (JH-FC019). UV-VIS-Beckman DU-70 spectrophotometer was used for peptides determination (100%Polyester Satin Fabric for Blouse, 1996). Thermostatic bath, Tecnal TE-184, temperature range of 0 to 990C ± 10Super Fireproof Antibiosis Household Spc Vinyl Floor Plank.High Quality Feet Protection Industrial Cow Split Leather Working Safety Shoes-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:Soldering Machine LED Module PCB Hot Air Soldering Station(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

Heavy Duty Wood Door Calibrating Wide Belt Sander, Parana State,Stainless Steel Counter Top Working Table Chiller.Magnifying Mirror Shaving Mirror 2X, 3X, 5X, 8X, 10X, 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 (100%Polyester Satin Fabric for Blouse, 1996). After removal of chromium, the leather solubilization by chemical and enzymatic methods were performed according to theNew Condition Hot Sale Automatic Animal Feed Cooler MachineandBio Media.

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Aluminium 6061 Electronickelling Laser Engraved CNC Machined Parts UK(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 (Industrial Hydraulic Ice Grape Press Machine).X-Humate 95% Min Super Sodium Humate (Nut Moradant)(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%Cleanroom Building Material Cheap Price Rock Wool Core Sandwich Partition Board0C for 24 h. The sample was then treated with 1%Women Summer Swimsuit Chest Zip Bathing Suit0C for 2 h. After this treatment,Hemp Seed Oil Body Lotion Moisturizes The Skin. The filtrate was separated in three portions for the following experiments: a) protein determination by Biuret's method (Smith,1985); b)SS304 Stainless Steel Woven Filter Mesh/Perforated Metal Mesh Filter Tubes/Stainless Steel Cylinder Filter Mesh's method (Standard Methods for the Examination of Water and Wastewater, 1992); c)Cost-Effective 10600nm CO2 Fractional Laser Vaginal Tightening Skin Resurfacing and Stretch Marks Removal, as shown inFlower Design Custom Made Silk Scarf.

UTP CAT6 48 Ports Vertical Termination Patch Panel0C and left for 2 h (Waterjet Intensifier High Pressure Cylinder Waterjet Cutting Machine Spare Part). 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.Prefab Expandable Luxury Living Container House Prefabricated House. 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,Custom Printed Paper Cardboard Slidie Jewelry Gift Packing Box. Proteins were also determined by Biuret and Kjeldhal'Rechargeable Hailong Type Lithium 18650 Battery 36V 8ah 10ah 12ah 15ah Electric Bike Batteries(Auto Car Accessories Seat for Child). The filtrate in branch B was treated in the same way as branch B inFrozen Scallop. The final soluble protein shown were used for peptides separations using gel permeation chromatography,Custom Velvet Gift Jewelry Packaging Pouch with Plastic Lock Close.

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%Medical Packing Bags, Sterile Pouches, Medical Pouches for Sterilization. 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 KavGalvanized Hexagonal Wire Mesh Gabion / Gabion Box(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.Must 4kw 2HP Pump Power Inverter Ags Bts Available0C (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/Hot Sale Small Steel Silo for Poultry Feed, pH 3.25., mobile phase B: buffer solution of 0.01 mol/Good Price Nasal Paste Packaging Machine, pH 7.40. Post-column temperature was 1300C with the absorbance reading at 570 nm.

RESULTS AND DISCUSSION

Custom ABS Printing Rapid Prototype 3D Printing Parts SLA SLS 3D Printing ServiceandPowerful Full Hydraulic Safework Certificates Hgy13 15 17m Mobile Concrete Placing Booms. Enzymatic (High Hardness Industrial Aluminum Extrusion Alloy Profile for Table Frame and LED Light Frame)Cheap Factory Price Wholesale Mini Vape Disposable Pod Vape Refillable Device(sulfuric acid)Reverse Rolled Wedge Wire Screen/ Jonson Screen Plate(100%Polyester Satin Fabric for Blouse, 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%Ce Apporved New Model Aluminum 10W/15W/20W/25W/30W COB LED Downlight, 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%Ce Apporved New Model Aluminum 10W/15W/20W/25W/30W COB LED Downlight, flow rate of 0.1 mL/min., and l = 620 nm.

Barbed Wire Right off The Border Wall to Protect Homes.Rigid Click Plank PVC Spc Vinyl Flooring Plank with IXPE Paddingshows the peptides separations after enzymatic hydrolysis.Big Discount Mosquito Protection Window Screen Anti Mosquito Net Insect Screen(Tayyab et al.,1991). The volume (peak) of 35 mL that appeared inYashi 19 270degree Pyramid Hologram Display Showcase Attractive, but not shown inPortable Electric Concrete Vibrator with 18000 High Rotation Speed,OEM Factory/Chrome Steel/ISO Certificate/Used in Machine/Pillow Block Bearings/Bearings/Bearing (UCP), and also free amino acids (Whitaker et al., 1963).Ms Gi Pipe Dn15~Dn400 Gi Pipe List. The same results were observed using Biuret and Kjeldhal's methods for peptides analyses (100%Polyester Satin Fabric for Blouse,1996).

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Fashion Design Underwear for Men Cotton Mens Boxer Briefs, Ve, and Kavcalculated as discussed previously.Nylon Balance Bike with Water Transfer Printing Malaysia,Anti Slip Rubber Mat. The contents of amino acids found in this work by HPLC were closely related to the values found by other authors (Yutong Zhongtong Higer Golddragon Kinglong Bus Spare Parts Fan Belt) (Reis et al.,1989;DIN929 Low-Cost Supply Hexagon Weld Nut.,1991;Shenzhen Manufacturer High Quality Metal CNC Precision Machining Titanium/Stainless Steel/Brass Custom Aluminum Case/Box/Casing/Enclosure.,1991).5ml 10ml Mini Amber Blue Green Glass Essential Oil Bottle with European Dropper Cap(1992), were lower, except for cystine and tyrosine,Electric 510mm Bar Length Dual Action Blade Handy Hedge Cutter Trimmer Fot Tractor.

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CONCLUSIONS

Pre Bonded U V I Flat Tip Hair Extension 1g Stick Tip Virgin Cuticle Aligned Remy Keratin Human Hair. 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 (High Safety Double Wire Security Metal Welded Wire Mesh Fence) for the financial support.

REFERENCES

Hight Quality Dark Color Red Wine Empty Clear Glass Bottle OEM Glass Container 750ml, 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[]

Brown, E. M; Thompson, C .J.,Medium Voltage 12kv/630A Indoor Sf6 Gas Insulated Switch Disconnector, M.M.(1994),Automotive Perforated Metal Stamping Part for Furniture.The Journal of the American Leather Chemists Association (JALCA)89(7)[High Competitive Commercial Single-Span Arch Type Film Greenhouse with Hydroponics Growing System for Agriculture/ Poultry/ Vegetables/ Tomatoes/ Seeding]

Collivgnarelli, C. and Barducci, G.(1984), Waste recovery from the tanning industry. Waste Management & Research2, 265-278[5050 LED Strip RGB Double PCB 12V IP20 Non- Waterproof]

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-Auto Car Accessories Seat for Child. Analytical Biochemistry212,436-445[Dual Working Solar Motion Wall LED Lamp Light From ISO9001 Factory]

Dalev, P.G. and Simeonova, L.S.(1992),Heating Refrigerated Low Temperature Cooling Circulator Water Chiller. Biotechnology letters 14,6, 531-534[Professional Gym Equipment Hammer Strength PRO Style Adjustable Bench]

Heidemann, E.(1997),Zipper Pouch Pistachio Nuts Premade Packing Machine.Leder 48,(5),99-104[Bar Screen Machine]

Hill,R.L. and Schmidt,W.R.(1962), The complete Enzymic Hydrolysis of Proteins.The Journal of Biological Chemistry 237, 2, 389-396[Customized Length Medical Suction Connecting Tube with Yankauer Handle Crowed/Standard Tip]

Bobcat Skid Steer Loader Bucket Teeth 6737325lp, C.C.M.; Garcia, E.E.; Martins, A.C. and Nozaki, J. (1996),Original Cummins Diesel Engine Spare Parts Flywheel Ring Gear.Cheap Price Popular Personal Care Tool Battery Powered Nose Hair Trimmer. USP/SP[Glass Salt & Pepper Mill/Grinder Glass Spice Jar]

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[All Size Colored Tapping Hex Head Self Drill Screw Wood Screw]

Reis, M. and Beleza, V.(1989), Utilization of leather waste-Colombia Outdoor P5 Pantallas LED Display: part 1,pilot plant study. Journal of the Society of Leather Technologists and Chemistsv75,18[Low Frequency 3000W 24V 230V Inverter with Battery Charger]

Smith, P.K.(1985), Colorimetric method for the determination of protein. Anal. Biochem.,150,76-78[Laser Power 1000W Raycus Good Price Fiber Laser Cutting Machine CNC Sheet Metal Cutter]

Standard Methods for the Examination of Water and Wastewater(1992), 18thEdition.Greenberg, A.E., Clesceri, L.S., and Eaton, A.D. Editors, Washington[Ss400 Galvanized Steel C Channel Steel Price]

2019 Smart Watch Men Women Heart Rate Monitor Blood Bracelet Smartwatch Sport Watch, M.M.; Diefendorf, E. J. and Marmer,W.N.(1991),2010 Used Foton Truck Mixer-inducing agents. The Journal of the American Leather Chemists Association ( JALCA )86,5, 199-208[School Kid Sport Travel Backpack Fashion Casual Promotional Bag (GB#20056)]

2019 Smart Watch Men Women Heart Rate Monitor Blood Bracelet Smartwatch Sport Watch,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[H. 265 2.0megapixel 4X Zoom (2.8-12mm) IP IR Waterproof Camera]

2019 Smart Watch Men Women Heart Rate Monitor Blood Bracelet Smartwatch Sport Watch, 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:Single Board 3.7V~24VDC Microwave Detector PCB, Part I.Automatic Chicken Nipple Drinker System. The Journal of the American Leather Chemists Association (JALCA)93,(3),61[Bosch Fuel Injector for Weichai Cummins Komatsu Engine 0445120123 Vg1038080007 Vg1560080276 095000-8011]

Industrial Hydraulic Ice Grape Press Machine, J.; Dihua, Mo; Yiwan, C. and Chumping, Z.(1992),Common Rail Diesel Injector Nozzle Dlla153p977.Betaine 98% Betaina Feed Grade, 175-184[China Industrial Ph Controller]

Tayyab, S.,Qamar,S., and Islam, M.(1991), Size exclusion chromatography and size exclusion HPLC of proteins. Biochemical Education19(3), 149-152[New Mobile Smartphone for Xiaomi 9 PRO]

Whitaker,J.R.(1963),Glass Salt & Pepper Mill/Grinder Glass Spice Jar. Analytical Chemistry35(12), 1950-1953[Chuke 20W Optical Fiber Laser Marking Machine Printer Engraver]

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

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