DDA Registration

DDA Registration
registration, orders and payments

Check the conditions on this page whether you are eligible to use the DDA method free of charge. You can also order products that you may not be able to source in your neighbourhood.

why register? those in paid employment, institutions and businesses must contribute to the research and further development of the DDA method and the aims of the charitable Seafriends Foundation.

What is the DDA? what defines the DDA as a unique invention?
What is free? what are you authorized to do and what not? Who can use it free of charge?
Recognition and credit: all users must credit the inventor.

easy licence options: choose the option that suits your needs and pay by credit card through PayPal.
other products: you can make your own, or just place an order for sets and parts.
print from this web site: a reminder that you can print various helpful documents for free.
be seen: submit the URL of your institution or group so people can find you. Form a network.

. For comments and suggestions, e-mail the author, Dr J Floor Anthoni.
-- Seafriends home -- DDA index -- site map -- Rev 20050530,20050630,20050803,

Why register?
The DDA method to test the health of plankton ecosystems is an important and novel discovery that will be used widely. It was discovered by the personal endeavours of Dr J Floor Anthoni, and was entirely funded from savings, earnings and unpaid time. As an outsider to the scientific community, Dr Anthoni is not eligible for public funding and needs to recover costs in a different way. By means of registration, and payment for each sample taken, the benefits obtained can now contribute to the endeavours and aims of the charitable Seafriends Foundation and further discoveries. It is money well spent.

What is the DDA?
The DDA consists of a number of steps, each of which are not new or spectacular, but when combined, constitute a new way of measuring:

rather than dragging a net through the water, a small sample is taken of the water with all components of the aquatic ecosystem.
the container or vial is hermetically sealed and the air bubble above the sample minimised and standardised.
the vial is placed in complete darkness.
temperature is stabilised at a convenient temperature (27º at mid-latitudes like New Zealand)
the vial is opened according to a set time schedule to minimise material losses. (but continuous recording is possible)
an additional high-energy food source is added, like ethyl alcohol
the pH is measured and recorded and biodensities calculated

The DDA essentially covers all methods measuring biomass by decomposition, using a pH meter.

What is free?
An invention like the DDA which is capable of measuring the health of natural waters, should ideally be free for all. For this reason, those who use it in an unpaid situation, to monitor a private aquarium or a non-commercial fish pond, are hereby authorised to use the DDA for free. Those who donate their time and effort for saving the environment, as part of an environmental group are also authorised free use, but not when such a group receives public funding. All users must acknowledge the intellectual property of Dr Anthoni, see below.

You are hereby authorised to use all text, diagrams, graphs and images for quotation or reproduction for non-commercial, educational or private use, except for print runs that have an accompanying budget. Contact the author to be sure.

Recognition and credit
All users of the DDA method must acknowledge the intellectual property of Dr Anthoni when publishing or writing about it, which is just fair practice. A few examples follow here:
[1] Anthoni J F (2005), The Dark Decay Assay, www.seafriends.org.nz/dda/
[2] (the DDA was invented by Floor Anthoni, 2005)
[3] www.seafriends.org.nz/dda/

All others who use the DDA as part of their employment, business, consultancy or through government funding, must contribute by registering and purchasing a licence. This has been made easy through PayPal, an Internet 'bank' accepting credit cards. By clicking one of the purchase buttons below, your credit card details (which will remain unknown to us) will be accepted by PayPal and your personal or institutional information relayed to us for registration. You will then receive an e-mail confirming your payment, together with an authorisation code. Your data will be stored in our database which is not available to others and will not be used for any commercial purpose.

Should you have any questions, or wish to negotiate a special situation, please e-mail Floor Anthoni.

Easy licence options
This page gives you a number of options to suit your particular needs. Each option has a unique purchase button associated with it. Note that the licence is based on the number of vials (test tubes) used, and is set at a nominal US$ 1.00 per vial with a discount structure. Also an institutional licence is available, see below.

Payments by credit card are safely handled by PayPal
This beginners' option fills one travel incubator with 48 vials or less.	A small incremental option for non-frequent users.	An option to suit frequent users who wish to get on with the job.	An unlimited annual licence, suitable for institutions, universities, local bodies and businesses who see the DDA as an indispensable tool.

Your donation today can make a big change tomorrow. Donate generously to save our seas.

Other products
Everything you need for doing the Dark Decay Assay has been described on this web site (see gear.htm) so that you can make your own. However, should you wish us to put a set together for you, you can purchase it here, together with replacement items.

[to be completed later]
Standard set in suitcase: pH meter + test buffers + collar caps, 50m measuring tape, dark beaker, registration cards and more. (photos)

Travelling incubator for 48 vials, includes thermostat and internal emergency battery, 2 aluminium trays + 48 vials + collar caps. (photo)

Spares: pH head, test buffers, collar lids,

Separate: pHtestr30 pH-meter, tested, run-in and calibrated. Spare probe/sensor for pHtestr30.

Print from this web site
A number of products can be printed direct from this web site for free, with your browser. Note that it is known that Microsoft's Internet Explorer and Netscape after Rev 4.8 split pictures and tables across page boundaries, which looks messy. Should you wish a clean printout, download Netscape Communicator 4.7 from the file cc32e47.exe (18MB) available from various Internet archives such as endeavor.med.nyu.edu/download/win95/ . It can also be downloaded from the Seafriends CD at /scrntx03/cc32e47.exe.

DDA manual: (manual.htm) on this web site.
result cards/pages: (ddacard.gif) two A5 pages on one A4 to be used as pages or cards for writing results on.
tray layout: (ddatray.gif) an A4 layout to make your own cardboard incubator trays.
graph paper: (ddaplot.gif) special graph paper to plot your results onto, two to one page. Can be used as cards.
pH-meter calibration log (phcal.gif): a record of pH-meter calibrations.

Be seen and be networked
Submit the URL of your environmental group or otherwise so that you can be found by others. Form a network. The link you provide will be placed in our links page. Just e-mail the author with the details you wish to be placed in the links page.
Submit the details of your scientific publication using the DDA method, so that others can find it. Let's work together to make it better!