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e-gel manualBy using our site, you accept our See our Holiday Shipping Schedule.Live chat is available from 8am to 6pm ET, Monday-Friday. Create a quote request on our website or contact our International Sales Team. See our Holiday Shipping Schedule.Use Quick Order or Search to quickly add items to your order! Carolina Biological Supply has everything you need to complete your classroom environmental science experiments. Carolina Biological Supply has everything you need to complete your classroom life science activities and experiments. Shop Carolina's variety of lab equipment including microscopes, glassware, dissection supplies, lab furniture and more. There's a simple set up with consistent results. Kits and materials for educators by educators. A wide product selection—from gel chambers to power supplies, centrifuges and pipets. Just reorder the fresh supplies you need and reuse the rest. Quality digital science resources and outstanding support for STEM concpets. Make difficult concepts easy to learn! Affordable price with superior performance. There are sets available for all skill levels or can be customized. Take time to view our high quality science lab equipment that has proven durability to handle any lab activity. Choose from our kits, follow a college board lab, or design your own with our wide variety of equipment and supplies. In stock and ready to ship! Selection includes aquatic and classroom plants. We have the compound microscope you are looking for! Students can take images, videos, and more. They are great for first tme student use. Exciting activities that make science active and fun! Exciting activities that make science active and fun! Carolina's innovative, proprietary tissue fixative produces superior specimens with life-like tissue texture and color. Excellent for hands-on, inquiry-based learning. Teaching NGSS is more than checking off standards.Everything from equilibrium to electricity and reactions to rocketry at your fingertips.http://adventglobal.com/EditorImages/cpim-exam-content-manual-2015.xml
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Mine activities, information, and helpful hints for ESS. Now use their fascination with mutli-dimensions to discuss visual perception, optics, and colors while studying the solar system. We have interdisciplinary activities and tips to help. Get general information, care guides, and product information here. Carolina understands. That’s why we’ve put together 8 fun, educational activities that won’t wreck your budget. Call Carolina at 800.335.5551 for more information. If you have a question that is not listed below or need additional information, please contact our Technical Support department. Which light base do you recommend? ? In addition to the Universal filter, the All three filters can be purchased separately.What is the emission spectra range. Which light base do you recommend? I know where it’s from or I’ve used it before. ” to allow the program to run. If the software dongle is not detected, the warning “Sentinel HASP key not found (H007)” will appear on screen.Captured images can then be exported to the GelQuant Express software for data analysis.The Express option is designed for analysis of nucleic acids and protein gel images. In the Express mode, lane profiles are analyzed with the flexible adjustment of background values. Separate bands can be quantified as one entity for easier analysis of complex results (e.g., degraded or smear bands).The image needs to be available in.jpeg or.tiff format. However, the E-Gel Imager is not recommended for the acquisition of protein gel images, which typically require white-light illumination.Download here:Not for use in diagnostic procedures. The manually controlled camera zoom and focus gives users complete control of their imaging, and intuitive genePIX acquisition software enable a fast and efficient workflow. The UV transilluminator also slides out from the main body of the system allowing gel extraction of DNA fragments. For analysis, Company registration number: 5216815.http://koppeika.ru/userfiles/cpim-exam-content-manual-2014.xml It requires making buffers, pouring gels, loading wells, following their migration, imaging and documenting the results and crunching the data—then dealing with the toxic waste—all to assess the relative migration of some macromolecules. Pre-cast gels and pre-made buffers have made things a little easier, but many researchers would still welcome more automation in their nucleic acid (and protein) analysis workflow. Now, thanks to automated gel-electrophoresis systems, they can get it. Advantages of automation Several commercial systems are capable of automating some or all the steps required to run a gel. As with slab-gel electrophoresis, these systems take advantage of the macromolecules’ propensity to differentially migrate through a lattice meshwork gel in response to an electrical field. Yet for the most part these meshworks are contained within narrow enclosures such as glass or polymer capillary tubes or microfluidic channels. Macromolecules pick up a fluorescent dye as they traverse the gel, enabling the instrument’s optical system to detect them as they pass by. This lets researchers visualize separations on the fly and immediately, automatically document and digitally archive them. 21 CFR Part 11 compliance packages are often available. Automation Some automated electrophoretic systems, like the Bioanalyzer and Experion, can handle a dozen or fewer samples at a time and essentially automate from the same point at which a slab gel would be loaded. After voltage is applied, the samples are transported through the chip’s architecture. Kits—which include gels, reagents and chips with different internal configurations—are designed for different size ranges of DNA, standard or high resolution and even protein separations. The QIAxcel can handle up to 96 samples without manual intervention by iterative use of a 12-capillary array and autosampler.http://ninethreefox.com/?q=node/13446 Such systems often can sample from microtubes or 96-well plates, and many have built-in autosampling capabilities or are designed to be robotic-compatible. The device can be put onto an automated platform, and because the 48- or 96-well slab E-gels are dry and encased in plastic, they can be manipulated by a robotic gripper. Because the wells are very well defined, Karaman adds, it’s easy to map them on an automation platform for automatic loading. Although larger sample sizes generally are required on an E-Gel than for microfluidic- or CE-based systems, this can actually be an asset. Purified sample can be recovered by allowing the band to run into a second cut-out well. Because the E-gel is dry when the sample gets to in the second well it can be pipetted up in water, TE, or other buffer. There are also smaller, 12-lane E-Gels that can be used for sample recovery. These gels can be automatically imaged while running by using a companion light box and camera setups. (Lonza’s FlashGel is a similar system.) Researchers do not tend to automate these smaller systems with robotics, says Karaman. The capital costs of E-gel systems are comparable to those of traditional slab-gel rigs, with consumables costing about the same as pre-cast gels. What price accuracy. What price reproducibility. And then decide whether it’s worth the cost. Image: Agilent Technologies Results are delivered within 30-40. read more All rights reserved. Find products. Free subscription. When you select your country, you agree that we can place these functional cookies on your device. Your commerce experience may be limited. Please update your browser to Internet Explorer 11 or above. After that, you will need to contact Customer Service to unlock your account. Please try again or contact Customer Service. Please request another reset link. Please try again or contact Customer Service. A verified email address is required to access the full functionality of your Promega.com account.https://estacionsurmadrid.avanzagrupo.com/images/canon-pixma-ip3300-service-manual-pdf.pdf Please try again or contact Customer Service. Please try again or contact Customer Service. Please try again or contact Customer Service. Please check your network settings and try again. Please try again or contact Customer Service. It is more much more sensitive than ethidium bromide, so less sample nucleic acid and nucleic acid markers are required for visualization, resulting in increased savings with every gel you run. Not for Use in Diagnostic Procedures. Your commerce experience may be limited. Please update your browser to Internet Explorer 11 or above. When you select your country, you agree that we can place these functional cookies on your device. After that, you will need to contact Customer Service to unlock your account. Please try again or contact Customer Service. Please request another reset link. Please try again or contact Customer Service. A verified email address is required to access the full functionality of your Promega.com account. Please try again or contact Customer Service. Please try again or contact Customer Service. Please try again or contact Customer Service. Please check your network settings and try again. Please try again or contact Customer Service. All five BenchTop DNA Markers are compatible with both systems, offering researchers flexibility and convenience in the use of these molecular weight markers. Prior to the discovery that DNA fragments could be separated by size via gel electrophoresis, scientists used methods like sucrose density gradients to determine the fragment lengths of DNA in their sample. In 1968, Takahashi et al.Commercially available DNA ladders, or markers, aided scientists in accurately sizing their DNA fragments. These markers were frozen fragments of DNA, and for use on agarose gels, required the addition of a loading dye prior to loading into the gel. DNA markers also have evolved, with options for a variety of fragment sizes, premixed loading dye, and stability at room temperature. The ladder was run in duplicate and visualized with ethidium bromide. All known molecular weight bands can be observed on both gel types.All known molecular weight bands can be observed on both gel types.The direct-loading capability, coupled with room temperature stability and precast gel compatibility make the BenchTop DNA Markers a convenient and reliable means to accurately determine the size of DNA fragments on an agarose gel. Updated 2011. Accessed Month Day, Year. Agarose is isolated from the seaweed genera Gelidium and Gracilaria, and consists of repeated agarobiose (L- and D-galactose) subunits 2. During gelation, agarose polymers associate non-covalently and form a network of bundles whose pore sizes determine a gel's molecular sieving properties. The use of agarose gel electrophoresis revolutionized the separation of DNA. Prior to the adoption of agarose gels, DNA was primarily separated using sucrose density gradient centrifugation, which only provided an approximation of size. To separate DNA using agarose gel electrophoresis, the DNA is loaded into pre-cast wells in the gel and a current applied. The phosphate backbone of the DNA (and RNA) molecule is negatively charged, therefore when placed in an electric field, DNA fragments will migrate to the positively charged anode. The rate of migration of a DNA molecule through a gel is determined by the following: 1) size of DNA molecule; 2) agarose concentration; 3) DNA conformation 5; 4) voltage applied, 5) presence of ethidium bromide, 6) type of agarose and 7) electrophoresis buffer. After separation, the DNA molecules can be visualized under uv light after staining with an appropriate dye. By following this protocol, students should be able to: 1. Understand the mechanism by which DNA fragments are separated within a gel matrix 2. Understand how conformation of the DNA molecule will determine its mobility through a gel matrix 3. Identify an agarose solution of appropriate concentration for their needs 4. Prepare an agarose gel for electrophoresis of DNA samples 5. Set up the gel electrophoresis apparatus and power supply 6. Select an appropriate voltage for the separation of DNA fragments 7. Understand the mechanism by which ethidium bromide allows for the visualization of DNA bands 8. Determine the sizes of separated DNA fragments Swirl to mix. The most common gel running buffers are TAE (40 mM Tris-acetate, 1 mM EDTA) and TBE (45 mM Tris-borate, 1 mM EDTA). This is most commonly done by heating in a microwave, but can also be done over a Bunsen flame. At 30 s intervals, remove the flask and swirl the contents to mix well. Repeat until the agarose has completely dissolved. Gloves should always be worn when handling gels containing EtBr. Alternative dyes for the staining of DNA are available; however EtBr remains the most popular one due to its sensitivity and cost. Alternatively, one may also tape the open edges of a gel tray to create a mold. Place an appropriate comb into the gel mold to create the wells. Allow the agarose to set at room temperature. Remove the comb and place the gel in the gel box.Loading dye helps to track how far your DNA sample has traveled, and also allows the sample to sink into the gel. It is important to use the same running buffer as the one used to prepare the gel. Turn on the power supply and verify that both gel box and power supply are working. The cathode (black leads) should be closer the wells than the anode (red leads). Double check that the electrodes are plugged into the correct slots in the power supply. Drain off excess buffer from the surface of the gel. Place the gel tray on paper towels to absorb any extra running buffer. This is most commonly done using a gel documentation system ( Fig. 4 ). DNA bands should show up as orange fluorescent bands. Take a picture of the gel ( Fig. 5 ). After separation, the resulting DNA fragments are visible as clearly defined bands. The DNA standard or ladder should be separated to a degree that allows for the useful determination of the sizes of sample bands. In the example shown, DNA fragments of 765 bp, 880 bp and 1022 bp are separated on a 1.5 agarose gel along with a 2-log DNA ladder. The gel was exposed to uv light and the picture taken with a gel documentation system. Agarose's high gel strength allows for the handling of low percentage gels for the separation of large DNA fragments. Molecular sieving is determined by the size of pores generated by the bundles of agarose 7 in the gel matrix. In general, the higher the concentration of agarose, the smaller the pore size. Traditional agarose gels are most effective at the separation of DNA fragments between 100 bp and 25 kb. To separate DNA fragments larger than 25 kb, one will need to use pulse field gel electrophoresis 6, which involves the application of alternating current from two different directions. In this way larger sized DNA fragments are separated by the speed at which they reorient themselves with the changes in current direction. DNA fragments smaller than 100 bp are more effectively separated using polyacrylamide gel electrophoresis. Unlike agarose gels, the polyacrylamide gel matrix is formed through a free radical driven chemical reaction. These thinner gels are of higher concentration, are run vertically and have better resolution. In modern DNA sequencing capillary electrophoresis is used, whereby capillary tubes are filled with a gel matrix. The use of capillary tubes allows for the application of high voltages, thereby enabling the separation of DNA fragments (and the determination of DNA sequence) quickly. Low melting agarose is generally used when the isolation of separated DNA fragments is desired. Hydroxyethylation reduces the packing density of the agarose bundles, effectively reducing their pore size 8. This means that a DNA fragment of the same size will take longer to move through a low melting agarose gel as opposed to a standard agarose gel. Because the bundles associate with one another through non-covalent interactions 9, it is possible to re-melt an agarose gel after it has set. When exposed to uv light, electrons in the aromatic ring of the ethidium molecule are activated, which leads to the release of energy (light) as the electrons return to ground state. EtBr works by intercalating itself in the DNA molecule in a concentration dependent manner. This allows for an estimation of the amount of DNA in any particular DNA band based on its intensity. Because of its positive charge, the use of EtBr reduces the DNA migration rate by 15. EtBr is a suspect mutagen and carcinogen, therefore one must exercise care when handling agarose gels containing it. In addition, EtBr is considered a hazardous waste and must be disposed of appropriately. Alternative stains for DNA in agarose gels include SYBR Gold, SYBR green, Crystal Violet and Methyl Blue. Of these, Methyl Blue and Crystal Violet do not require exposure of the gel to uv light for visualization of DNA bands, thereby reducing the probability of mutation if recovery of the DNA fragment from the gel is desired. However, their sensitivities are lower than that of EtBr. SYBR gold and SYBR green are both highly sensitive, uv dependent dyes with lower toxicity than EtBr, but they are considerably more expensive. Moreover, all of the alternative dyes either cannot be or do not work well when added directly to the gel, therefore the gel will have to be post stained after electrophoresis. Because of cost, ease of use, and sensitivity, EtBr still remains the dye of choice for many researchers. However, in certain situations, such as when hazardous waste disposal is difficult or when young students are performing an experiment, a less toxic dye may be preferred. First they add density to the sample, allowing it to sink into the gel. Second, the dyes provide color and simplify the loading process. Finally, the dyes move at standard rates through the gel, allowing for the estimation of the distance that DNA fragments have migrated. The DNA standard contains a mixture of DNA fragments of pre-determined sizes that can be compared against the unknown DNA samples. It is important to note that different forms of DNA move through the gel at different rates. Supercoiled plasmid DNA, because of its compact conformation, moves through the gel fastest, followed by a linear DNA fragment of the same size, with the open circular form traveling the slowest. Electrophoresis of large DNA molecules: theory and applications. 9-22 (1991). Biotechniques. 7, 34-42 (1989). Available from: Electrophoresis. 4, 375-382 (1983). Biochemistry. 12, 3055-3063 (1973). Recommend JoVE to your institutional library. We will get back to you as soon as we can, so please stay tuned.Your access has now expired. Agarose is isolated from the seaweed genera Gelidium and Gracilaria, and consists of repeated agarobiose (L- and D-galactose) subunits 2. During gelation, agarose polymers associate non-covalently and form a network of bundles whose pore sizes determine a gel's molecular sieving properties. The use of agarose gel electrophoresis revolutionized the separation of DNA. Prior to the adoption of agarose gels, DNA was primarily separated using sucrose density gradient centrifugation, which only provided an approximation of size. To separate DNA using agarose gel electrophoresis, the DNA is loaded into pre-cast wells in the gel and a current applied. The phosphate backbone of the DNA (and RNA) molecule is negatively charged, therefore when placed in an electric field, DNA fragments will migrate to the positively charged anode. The rate of migration of a DNA molecule through a gel is determined by the following: 1) size of DNA molecule; 2) agarose concentration; 3) DNA conformation 5; 4) voltage applied, 5) presence of ethidium bromide, 6) type of agarose and 7) electrophoresis buffer. After separation, the DNA molecules can be visualized under uv light after staining with an appropriate dye. By following this protocol, students should be able to: 1. Understand the mechanism by which DNA fragments are separated within a gel matrix 2. Understand how conformation of the DNA molecule will determine its mobility through a gel matrix 3. Identify an agarose solution of appropriate concentration for their needs 4. Prepare an agarose gel for electrophoresis of DNA samples 5. Set up the gel electrophoresis apparatus and power supply 6. Select an appropriate voltage for the separation of DNA fragments 7. Understand the mechanism by which ethidium bromide allows for the visualization of DNA bands 8. Determine the sizes of separated DNA fragments Keywords: Genetics, Issue 62, Gel electrophoresis, agarose, DNA separation, ethidium bromide Download video file. (16M, mp4) Protocol 1. Preparation of the Gel Weigh out the appropriate mass of agarose into an Erlenmeyer flask. Add running buffer to the agarose-containing flask. Swirl to mix. The most common gel running buffers are TAE (40 mM Tris-acetate, 1 mM EDTA) and TBE (45 mM Tris-borate, 1 mM EDTA). This is most commonly done by heating in a microwave, but can also be done over a Bunsen flame. At 30 s intervals, remove the flask and swirl the contents to mix well. Repeat until the agarose has completely dissolved. Note: EtBr is a suspected carcinogen and must be properly disposed of per institution regulations. Gloves should always be worn when handling gels containing EtBr. Alternative dyes for the staining of DNA are available; however EtBr remains the most popular one due to its sensitivity and cost. Failure to do so will warp the gel tray. Place the gel tray into the casting apparatus. Alternatively, one may also tape the open edges of a gel tray to create a mold. Place an appropriate comb into the gel mold to create the wells. Pour the molten agarose into the gel mold. Allow the agarose to set at room temperature. Remove the comb and place the gel in the gel box. Loading dye helps to track how far your DNA sample has traveled, and also allows the sample to sink into the gel. Add enough running buffer to cover the surface of the gel. It is important to use the same running buffer as the one used to prepare the gel. Attach the leads of the gel box to the power supply. Turn on the power supply and verify that both gel box and power supply are working. Remove the lid. Slowly and carefully load the DNA sample(s) into the gel ( Fig. 3 ). An appropriate DNA size marker should always be loaded along with experimental samples. Replace the lid to the gel box. The cathode (black leads) should be closer the wells than the anode (red leads). Double check that the electrodes are plugged into the correct slots in the power supply. Turn on the power. Run the gel until the dye has migrated to an appropriate distance. 3. Observing Separated DNA fragments When electrophoresis has completed, turn off the power supply and remove the lid of the gel box. Remove gel from the gel box. Drain off excess buffer from the surface of the gel. Place the gel tray on paper towels to absorb any extra running buffer. Remove the gel from the gel tray and expose the gel to uv light. This is most commonly done using a gel documentation system ( Fig. 4 ). DNA bands should show up as orange fluorescent bands. Take a picture of the gel ( Fig. 5 ). Properly dispose of the gel and running buffer per institution regulations. 4. Representative Results Figure 5 represents a typical result after agarose gel electrophoresis of PCR products. After separation, the resulting DNA fragments are visible as clearly defined bands. The DNA standard or ladder should be separated to a degree that allows for the useful determination of the sizes of sample bands. In the example shown, DNA fragments of 765 bp, 880 bp and 1022 bp are separated on a 1.5 agarose gel along with a 2-log DNA ladder. The gel was exposed to uv light and the picture taken with a gel documentation system. Discussion Agarose gel electrophoresis has proven to be an efficient and effective way of separating nucleic acids. Agarose's high gel strength allows for the handling of low percentage gels for the separation of large DNA fragments. Molecular sieving is determined by the size of pores generated by the bundles of agarose 7 in the gel matrix. In general, the higher the concentration of agarose, the smaller the pore size. Traditional agarose gels are most effective at the separation of DNA fragments between 100 bp and 25 kb. To separate DNA fragments larger than 25 kb, one will need to use pulse field gel electrophoresis 6, which involves the application of alternating current from two different directions. In this way larger sized DNA fragments are separated by the speed at which they reorient themselves with the changes in current direction. DNA fragments smaller than 100 bp are more effectively separated using polyacrylamide gel electrophoresis. Unlike agarose gels, the polyacrylamide gel matrix is formed through a free radical driven chemical reaction. These thinner gels are of higher concentration, are run vertically and have better resolution. In modern DNA sequencing capillary electrophoresis is used, whereby capillary tubes are filled with a gel matrix. The use of capillary tubes allows for the application of high voltages, thereby enabling the separation of DNA fragments (and the determination of DNA sequence) quickly. Agarose can be modified to create low melting agarose through hydroxyethylation. Low melting agarose is generally used when the isolation of separated DNA fragments is desired. Hydroxyethylation reduces the packing density of the agarose bundles, effectively reducing their pore size 8. This means that a DNA fragment of the same size will take longer to move through a low melting agarose gel as opposed to a standard agarose gel. Because the bundles associate with one another through non-covalent interactions 9, it is possible to re-melt an agarose gel after it has set. EtBr is the most common reagent used to stain DNA in agarose gels 10. When exposed to uv light, electrons in the aromatic ring of the ethidium molecule are activated, which leads to the release of energy (light) as the electrons return to ground state. EtBr works by intercalating itself in the DNA molecule in a concentration dependent manner. This allows for an estimation of the amount of DNA in any particular DNA band based on its intensity. Because of its positive charge, the use of EtBr reduces the DNA migration rate by 15. EtBr is a suspect mutagen and carcinogen, therefore one must exercise care when handling agarose gels containing it. In addition, EtBr is considered a hazardous waste and must be disposed of appropriately. Alternative stains for DNA in agarose gels include SYBR Gold, SYBR green, Crystal Violet and Methyl Blue. Of these, Methyl Blue and Crystal Violet do not require exposure of the gel to uv light for visualization of DNA bands, thereby reducing the probability of mutation if recovery of the DNA fragment from the gel is desired. However, their sensitivities are lower than that of EtBr. SYBR gold and SYBR green are both highly sensitive, uv dependent dyes with lower toxicity than EtBr, but they are considerably more expensive. Moreover, all of the alternative dyes either cannot be or do not work well when added directly to the gel, therefore the gel will have to be post stained after electrophoresis. Because of cost, ease of use, and sensitivity, EtBr still remains the dye of choice for many researchers. However, in certain situations, such as when hazardous waste disposal is difficult or when young students are performing an experiment, a less toxic dye may be preferred. Loading dyes used in gel electrophoresis serve three major purposes. First they add density to the sample, allowing it to sink into the gel. Second, the dyes provide color and simplify the loading process. Finally, the dyes move at standard rates through the gel, allowing for the estimation of the distance that DNA fragments have migrated. The exact sizes of separated DNA fragments can be determined by plotting the log of the molecular weight for the different bands of a DNA standard against the distance traveled by each band. The DNA standard contains a mixture of DNA fragments of pre-determined sizes that can be compared against the unknown DNA samples. It is important to note that different forms of DNA move through the gel at different rates. Supercoiled plasmid DNA, because of its compact conformation, moves through the gel fastest, followed by a linear DNA fragment of the same size, with the open circular form traveling the slowest. In conclusion, since the adoption of agarose gels in the 1970s for the separation of DNA, it has proven to be one of the most useful and versatile techniques in biological sciences research. Disclosures We have nothing to disclose. References Sambrook J, Russell DW. Molecular Cloning. 3rd 2001. Kirkpatrick FH. Overview of agarose gel properties. IDT tutorial: gel electrophoresis. 2010. Available from:. Serwer P. Agarose gels: properties and use for electrophoresis.