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2014-08-12
So far so good. Was very helpful in completing government report on non-fillable .pdf document. That was the original purchase purpose. Now trying out modification / repair of existing fillable forms.
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2017-01-19
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2017-02-23
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2017-04-19
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Seemless way to fax, edit PDFs, send health claims, business correspondence. I just told my husband yesterday, “have I told you how much I love PDFfiller?” “Yes honey, every time you use it.”
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Wish I didn’t have to pay extra for receiving faxes.
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Mental health claim editing and faxing, business faxing, editing etc
2019-05-28
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2017-11-24
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2023-03-10
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I've been using different apps for years that take me about 15-30 minutes to change one document but with PDFfiller it took me less than two minutes! so worth the yearly fee.
2020-10-03
Crack Columns Resolution Feature
The Crack Columns Resolution feature is designed to enhance your data handling experience. This tool helps you efficiently address data inconsistencies in your columns, ensuring your datasets are clean and reliable. By using this feature, you can easily identify and resolve issues that may disrupt your data analysis.
Key Features
Automatic detection of crack columns
One-click resolution for data inconsistencies
Customizable settings to fit your needs
Real-time updates for immediate feedback
User-friendly interface for easy navigation
Potential Use Cases and Benefits
Data cleaning prior to analysis, ensuring accurate results
Simplifying the data preparation process for reports
Enhancing data quality for machine learning models
Saving time by reducing manual fixes
Improving overall data management efficiency
With the Crack Columns Resolution feature, you no longer have to struggle with messy data. This tool directly addresses the common challenge of dealing with erroneous or inconsistent data points. By automating the detection and resolution process, it not only streamlines your workflow but also allows you to focus on gaining insights rather than fixing problems. Empower yourself with this feature and experience smoother data handling.
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What is the optimal flow rate for column chromatography?
Well, there is published data1, primarily for analytical HPLC columns, which shows the optimal linear velocity is about ~0.8 mm/sec for a 10 micron media and ~1.8 mm/sec for a 5 micron particle. Bigger particles such as those used in flash and column chromatography demand even slower linear velocities to be optimal.
What is flow rate in chromatography?
The standard size HPLC column (4.6 × 250 mm) is run at a flow rate of 1 mL/min. 4.6 refers to the internal diameter and 250 refers to the length of the HPLC column in millimeters. Since flow rate directly impacts HPLC system pressure a discussion of parameters that affect system pressure are listed below.
How do you calculate flow rate in chromatography?
Fill Flow velocity or Volumetric flow rate together with Column diameter and hit the “Convert” button to calculate the empty field. Hit reset button to clear the fields. The empty field is calculated from the formula: Volumetric flow rate (L/h) = (flow velocity (cm/h) * (column correctional area (cm2) /1000).
What is flow rate in gas chromatography?
The average linear velocity is a better measure of the impact of the carrier gas on the chromatographic results. However, there are situations in which the carrier gas flow rate is a necessary measurement. Helium carrier gas flow rates for 0.20-0.32-mm-i.d. columns are typically 0.8-2 mL/min.
How does flow rate affect chromatography?
A higher than usual flow rate may adversely affect the quality of the chromatography not giving the analyte sufficient time to interact with the stationary phase. Faster isn't always better. A lower than usual flow rate may leave the analyst waiting for the peak to appear at the detector.
How does Column diameter affect column chromatography?
This is due to there being an increased analyte concentration in the mobile phase. A change in column diameter will affect the loading capacity, both the volume of sample and the mass of analyte which can be injected onto the column, along with the flow rates which can be used.
How does Column length affect column chromatography?
Efficiency is directly proportional to column length (Equation 3). Increasing column length will increase efficiency. Doubling column length increases resolution but only by a factor of 1.4. Longer columns (250-300 mm) will give greater resolution but with longer analysis times and at a greater cost.
How does size affect chromatography?
The distance a sample travels can depend on the size or the polarity of the molecules involved. Larger molecules take longer to move up the chromatography paper or TLC plate, whereas smaller molecules are more mobile.
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