Microg Apk
Carletta Azahar
Methods: Fifty-eight women received either 10 microg or 25 microg estradiol vaginal tablets, administered once daily for 2 weeks, followed by twice-weekly dosing for 10 weeks. Blood samples were taken over 24 h at baseline (day -1) and days 1, 14, 82 and 83. Estradiol (E2), estrone (E1) and estrone sulfate (E1S) levels were quantified by gas chromatography-mass spectrometry (GCMS) and assessed by the average plasma concentration from time 0 to 24 h (C(ave)) derived from the area under the curve within 24 h (AUC((0-24))) divided by 24 h.
Results: Mean C(ave) values were 9.39 and 19.84 pg/ml on day 1, 6.56 and 18.29 pg/ml on day 14, and 4.64 and 9.41 pg/ml on day 83 for the 10 microg and 25 microg doses, respectively. After 12 weeks, E1 and E1S levels were slightly higher with the 25 microg dose and in the same range with the 10 microg dose, as compared to baseline.
Conclusions: During 12 weeks' administration, 10 microg vaginal tablets resulted in at least 50% lower mean estradiol concentrations than with the 25 microg dose within 24 h after dosing. Administering the 25 microg dose, mean E2 levels during the first 2 weeks exceeded the published reference range for postmenopausal women using the GCMS method, while, with the 10 microg dose, mean E2 levels remained in that range from the beginning, indicating minimized estradiol absorption.
I'm not that clever. The original idea of using a meter movement originally came from a pair of 1996 and 2001 articles in Scientific American by Shawn Carlson. George Schmermund came up with the original idea to use a surplus galvanometer movement as a microgram scale and Shawn Carlson wrote an article for Scientific American.
This is sooo cool! I totally want to try this out this summer. I'm doing undergrad chemistry research in polymer synthesis and the palladium catalysts we're using are needed in amounts like 0.2 mg, 0.5 mg etc and we have several analytical balances that have a display that goes to 000.0000 g so you'd think they would be able to measure out 0.5 mg with some kind of confidence but that doesn't seem to be the case. I can weigh a vial, take out what i think is about 0.5 mg then put the vial back on the scale and I never know what its going to tell me, sometimes it tells me the vial weights more than before i took some out! (other students and profs have the same problem so i don't think its just poor technique on my part). i think they sacrificed sensitivity for a wider range of measurement. I would be thrilled to have something that had a sensitivity of maybe +/- 0.1 mg, and you seem to have far exceeded that with your eyelash demonstration! I read the scientific american articles and they are very helpful. This project seems within the realm of possibility, i don't understand why there aren't affordable microgram scales on the market? Maybe you should start a new branch of TI called Affordable Microgram Scales! I'd buy one and i think other people would too! Thanks!
After being selected for the challenge and spending the year designing and manufacturing SHIRLEE, we traveled to the Johnson Space Center Neutral Buoyancy Laboratory (NBL) in Houston, Texas to test the device during our designated Test Week. The NBL is a training facility for astronauts that features a 6.2 million gallon pool. Underwater, it is possible to simulate a microgravity environment and learning to navigate this environment is an essential part of astronaut training. In addition, the pool contains a replica of the ISS, which astronauts use to train and prepare for spacewalks. Functionality in a microgravity environment is not only crucial for astronauts, but is also an essential requirement for the tools astronauts take with them. The purpose of our test week was for an NBL diver to test SHIRLEE underwater to see how it would perform in a microgravity environment.
Zip ties are commonly used on payloads and hardware outside of the International Space Station (ISS). Often times they need to be removed during a spacewalk, or Extravehicular Activity (EVA), to complete a maintenance task or another EVA objective. These zip ties could be anywhere on the payload, including smaller spaces that are hard to reach. Since this occurs in microgravity, the zip tie needs to be captured once removed to keep it from floating away and potentially causing damage to the ISS or another piece of hardware.
Handling microgram weights can be a challenge. A specially developed set of tools makes routine use easy and ensures safe and proper handling. It is a simple matter to lift the weights from the magazine and place them on a robotic or manual balance.
760c119bf3