Dijo Joseph, Rong Hu, Robert Min, Meenakshi Jolly, Sobia Hassan
Use and Utility of Patient After-Visit Instructions at a University Rheumatology Outpatient Clinic: Status and Randomized Prospective Pilot Intervention Study
ACR open rheumatology
assessing past habitability mars searching evidence ancient life jezero crater via perseverance rover key objectives nasas mars 2020 mission onboard rover pixl planetary instrument xray lithochemistry one best suited instruments search microbial biosignatures due ability characterize chemical composition fine scale textures geological targets using nondestructive technique pixl also first microxray fluorescence xrf spectrometer onboard mars rover present guidelines identifying investigating microbial biosignature aeolian environment using pixlanalogous microxrf xrf analyses collected samples modern wet aeolian environment padre island texas contain buried microbial mats analyzed using xrf techniques analogous pixl operated mars show via xrf technique microscope images geochemical textural variations surface 40 cm depth microbial mats associated heavymineral lags show specific textural geochemical characteristics make distinct biosignature environment upon burial acquire diffuse texture due expansion contraction gasfilled voids present geochemical signature rich iron titanium due trapping heavy minerals show intrinsic characteristics detected via xrf analyses distinct buried abiotic facies crossstratification adhesion ripple laminations also designed conducted interactive survey using padre island xrf data explore different users chose investigate biosignaturebearing dataset via pixllike sampling strategies show investigating biosignatures via pixllike analyses heavily influenced technical constraints eg xrf measurement characteristics variety approaches chosen different scientists lessons learned accurately identifying characterizing biosignature context rovermission constraints include defining relative priorities among measurements favoring multidisciplinary approach decisionmaking process xrf measurements selection considering abiotic results support discard biosignature interpretation results provide guidelines pixl analyses potential biosignature mars