![]() SEM-EDS, XRF, XRD, and FTIR were used to study the peculiarities of the pottery and to develop hypotheses about the raw material and technology choices present. The expected dose at the stadard settings is 0.82 R on the bottom shelf and 0.8128 * 5.5 = 4.4704, or about 4.5 R on the 2x shelf.A geochemical and mineralogical approach was used to analyze 3rd millennium BCE pottery from Southeast Lithuania that is attributed to the foreign Corded Ware Culture and local hunter-gatherers. ![]() Also, the dose on the 3x shelf is RPM/RPM = 5.618 times greater than the dose on the 1.5x shelf. Let's check: the dose on the 4x shelf is RPM/RPM = 5.4524 times greater than the dose on the 2x shelf. Doubling the magnification generally should increase the dose by a factor of 5.4. The dose on the 2x magnification shelf is RPM/RPM = 5.4447 times greater than the dose on the 1:1 shelf. We can enter dosages from each shelf from the documenation on exposure levels by shelf to estimate how much higher the dose is. We may put the seeds on a higher shelf for more magnification, maybe 1:1.5 or the 1:2. The dose unit quote here R is Roetngen.Ī little arithmetic can tell us total Roentgens for a ten second exposure: According to the documentation on dosage for our x-ray machine 18 kV outputs 292.6 R/h when the dosimeter probe is 57.2 cm away (that's the shelf with 1:1 magnification). We usually put the seeds on the bottom tray and the setting 10 s 18 kV. What is a typical radiation dose experienced by an Echinacea seed when we x-ray Echinacea fruits to assess seed set? I found a few software packages to investigate, listed below, but would appreciate any advice or leads on other software. Can anyone recommend software suitable for our needs? ImageJ will work, but it is clunky, taking many steps to set up the counting on each image. We want software that can do this one thing efficiently. However, we don’t need software that is complicated, and can do everything. We need software with the capability to tag three colors and make three separate counts per image. We are now going to classify achenes in x-ray images as full, partially full, or empty. It has a straightforward interface and easily does exactly what we want: click cursor on an achene, a dot appears on the achene and the counter increments by one, click cursor on next achene, a new dot appears, counter increments, repeat until all achenes are tagged, then read the counter. In our lab we use UTHSCSA ImageTool to count thousands and thousands of achenes (fruits) every year on thousands of images. P.s., here’s a small sampler of what the xrays look like Look for updates soon about these number for our pollen limitation heads! No, 1948 is the number of seed packets of echinacea we x-rayed at the garden this week: and it’s only Wednesday! Through the combined efforts of many volunteers we are making some headway into the daunting task of figuring out which achenes have seeds in them and which do not. Everyone already knows that 1948 was a leap year starting on Thursday of the Gregorian calendar, the 1948th year of the Common Era (CE) and Anno Domini (AD) designations, the 948th year of the 2nd millennium, the 48th year of the 20th century, and the 9th year of the 1940s decade.” To which I would say that we are dealing with the number 1948, not the year. ![]() Now this is the point that you might furtively look at wikipedia and say “I don’t understand what 1948 has to do with Echinacea. Dataset for “Genetic variation in reproductive timing…”įor those of you who read all of my flog posts (I know there’s a solid number of you out there!) you’ve probably figured out by now that I love posting about numbers.Dataset for “Pollinator effectiveness in a composite…”.Fire & fitness at Staffanson Prairie Preserve.Ison’s Echinacea microsatellite markers.exPt1 Aphid Abundance and Plant Damage 2004-2012.Flowering phenology in experimental plots.Fire & flowering at Staffanson Prairie Preserve.
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