Updating the Public Databases Miner


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The Public Records Database miner  (PUBDBS) at


has been updated and reindexed.

Search by states, gov agencies, or keywords.

Use it to build your own curated collection of public databases.

Find news relevant to public databases.

Acid-Base Systems Tool


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This is a new tool, available now at


The tool replaces a previous one (removed from the web) where only simple acid-base solutions were considered.

The current one is not limited to the analysis of one solution or to acid-base titrations. Actually the tool also supports pH calculations of systems not undergoing titrations.

This is a great tool for real world applications like pH calculations from natural acid-base systems where a sample might consist of multiple acids mixed with several bases and/or their salts.

Examples of such systems are bio-samples (blood, saliva…) as well as geo-samples (sea and river water) and urban samples (sewage, wastewater,..).

This new tool is based on a general equation for acid-base systems that is solved using a residual analysis algorithm, avoiding the need for using inversion techniques, successive approximations, Newton-Raphson method, or the evaluation of derivatives or high-degree polynomials.

Updating Open Source Projects Miner


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The Open Source Projects (OSP) miner at


has been updated and reindexed. Additional records will be added soon.

The miner also features news results from Bing, Google, and other sites.

Use it to build your own curated collection of open software or to access latest news on open projects from around the world.

Activity Coefficient Models Calculator


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This is a new tool available at


If you are into chemical data mining, this post might interest you.

This new Minerazzi tool easily solves activity coefficient models for a missing term.

Thus the tool allows you to cross-map activity coefficients to ionic strengths and vice versa using the following models:

Debye-Hückel Limiting Law

Debye-Hückel Extended Limiting Law




The tool , written in PHP, was inspired in the WATEQF program originally written in FORTRAN (https://www.nrc.gov/docs/ML0331/ML033170395.pdf).

Recent versions of that program are available for download from the U.S. Geological Survey site at https://wwwbrr.cr.usgs.gov/projects/GWC_chemtherm/software.htm

Chemistry researchers, teachers and students can benefit from this tool, which is part of an ongoing effort of making available online scientific research tools across different disciplines.

04-05-2017 Update: Additional content and literature references added.

Medical Cannabis Miner


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This is a new Minerazzi miner that is available now at


Find business, research, technology, legal resources, and more relevant to medical cannabis.

Talking about the subject, according to a CNBC news at


and quote:

“Oxford University will be at the forefront of a multimillion-pound research program, which hopes to help develop new therapies for acute and chronic conditions by examining the effects of medical cannabis. ”

“The oldest university in England will be teaming up with private equity company, Kingsley Capital Partners who will provide up to £10 million ($12.36 million) in initial investment, which will be funded through its new biopharmaceutical firm Oxford Cannabinoid Technologies (OCT). ”

“The partnership is expected to bring together Kingsley’s financial backing and Oxford’s clinical expertise and research in immunology, neuroscience and cancer, to find ways of developing new treatments for those suffering with pain, cancer and inflammatory disease. ”

“Scientists at the university expect to do this by studying the cellular, molecular, and systems mechanisms of cannabinoids. ”


Physiology and Chemistry Tools


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Recent available tools relevant to physiology and chemistry, with some interesting exercises.

Body Mass Index (BMI)

Corpulence Index (CI)

Membrane Potentials

Cell Electrode Potentials

Standard Electrode Potentials

Membrane Potentials Calculator for Cross-Mapping Goldman-Hodgkin-Katz (GHK) Equation


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In a recent post,


we mentioned a design pattern for easily cross-mapping all experimental variables from a given model. By applying the pattern to the Nernst Equation, we were able to develop the Standard Electrode Potentials Calculator which cross-maps all 4 experimental terms from said equation. This tool is available at


In this post we just want to mention that by applying the same design pattern to the Goldman-Hodgkin-Katz (GHK) Equation we were able to develop the Membrane Potentials Calculator, which cross-maps 12 experimental terms. This new tool is available now at


Examples on how to do the mapping of variables are given in the Suggested Exercises section of the tool.

Overall, we are confident that the patterns used in the design of these tools can be applied, across disciplines, to mathematical models consisting of more experimental variables.


IR, Data Structures, and Algorithms Updates


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The following complementary collections were reindexed and updated

Information Retrieval, http://www.minerazzi.com/irc

Data Structures & Algorithms, http://www.minerazzi.com/dsac

Both include RSS news channels to Bing, Google, MIT, and Arxiv so users can easily find news relevant to these collections.


A Cross-Mapping Tool for Standard Electrode Potential Calculations


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This is a cross-mapping tool for the analysis and manipulation of scientific data in an interactive fashion. Its design pattern will be used to build new upcoming tools across several and dissimilar disciplines.

The tool is available at


The tool easily solves the Standard Electrode Potential equation for a missing term. That is, given all but one of the experimental terms, the tool solves for the missing one.

There is no doubt that cross-mapping variables from a single tool set up is more engaging than single-mapping them: A great instructive tool for students and teachers alike.

Enjoy it.

Reagent Solutions Maker


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The Reagent Solutions Maker is a new tool available now in the Tools section of Minerazzi at


The tool is not really relevant to information retrieval, but the algorithm that runs behind it describes a useful pattern applicable to many fields and disciplines, including IR.

Anyway, the tool is aimed at solving the following problem.

An undiluted reagent solution is typically prepared by dissolving an amount of solid reagent in a solvent, usually water. Additional solvent is then added to bring the solution up to a specific volume.

With the reagent formula weight the solution concentration can be expressed in moles per liter, after proper unit conversions. A set of undiluted solutions at specific concentration intervals can be prepared in this way, but the calculations can be tedious. This tool was developed to simplify all these calculations.

The tool computes the amount of solid reagent needed to prepare n number of undiluted solutions at specific concentration intervals, ∆C, and up to a maximum concentration level, C, and volume, V, where C > ∆C > 0.

Notice that the set of solutions to be prepared, n, is not known in advance.