Multi-purpose Variable-G Platform (MVP) Cell-01: Over the weekend, the crew exchanged nutrients for the Cell-01 Experiment Modules and reinstalled them into the MVP. During the procedure, it was discovered that one of the new nutrient bags was defective and a new nutrient bag was retrieved to complete operations. The Cartilage–Bone–Synovium (CBS) Micro-Physiological System (MPS) using the MVP Cell-01 aboard the ISS studies the effects of spaceflight on musculoskeletal disease biology. Motivated by a disease called Post-traumatic Osteoarthritis in which a traumatic joint injury may lead to arthritis after loss of cartilage and bone, the ability of potential drugs to prevent the progression of this disease is tested on Earth and in space.

Micro-14: Over the weekend, the crew preserved processed Culture bags in preparation for return on SpX-17. Today, the hardware was removed from the Micro-Gravity Science Glovebox (MSG), completing Micro-14 mission Operations. The Micro-14 (Characterizing the Effects of Spaceflight on the Candida albicans Adaptation Responses) life science research mission will investigate and evaluate the responses of the Candida albicans microorganism to microgravity conditions and, in particular, to assess changes at the physiological, cellular, and molecular level and to characterize virulence factors.

ISS HERA (Hybrid Electronic Radiation Assessor): Over the weekend, the crew deactivated and stowed the hardware for the ISS HERA radiation assessor completing, a 40-day mission data-gathering period. ISS HERA refines data analysis and operational products that support future exploration missions. It uses an existing on-orbit radiation detection system developed for Orion and Exploration Mission 1 (EM-1), modified to operate on the ISS. The investigation also serves an opportunity to evaluate this hardware in the space radiation environment prior to the EM-1 flight.

Circadian Rhythms: The crew downloaded Circadian Rhythm armband data in the morning, then doffed the hardware later in the day to completing a 24hr data collection. Circadian Rhythms investigates the role of synchronized circadian rhythms, or the “biological clock,” and how it changes during long-duration spaceflight. Researchers hypothesize that a non-24-hour cycle of light and dark affects crewmembers’ circadian clocks.

CASIS PCG 14 (Wisconsin Crystal Growing Contest-Wisconsin Space Crystals): The crew performed liquid extraction from the crystal growth sample bags and documented photos of each of the two PCG kits. Previous investigations have shown that crystals grow larger and with fewer imperfections in microgravity. The CASIS PCG 14 investigation has two goals: to explore closed-system crystallization of inorganic salts from aqueous solutions using evaporation facilitated by a desiccant, and to examine how well a previously optimized thermal-gradient inorganic salt crystallization procedure translates to other systems. Middle and high school students compete to grow the most perfect ground-based crystals, as judged by experts in crystallography, and those with the fewest imperfections then fly their experiments aboard the space station.

The ISS Experience: The crew performed a recording to demonstrate a crewmember start of the day and closing of the day’s activities.The ISS Experience creates a virtual reality film documenting daily life aboard the ISS. The 8 to 10 minute videos created from footage taken during the six-month investigation cover different aspects of crew life, execution of science aboard the station, and the international partnerships involved. The ISS Experience uses a Z-CAM V1 Pro Cinematic Virtual Reality (VR) 360-degree camera with nine 190° fisheye lenses.

Story Time From Space: The crew completed an educational recording event using acceleration and oscillator tube devices to demonstrate Newton’s second and third laws of motion in microgravity. Story Time From Space combines science literacy outreach with simple demonstrations recorded aboard the ISS. Crewmembers read five science, technology, engineering and mathematics-related children’s books in orbit, and complete simple science concept experiments. Crewmembers videotape themselves reading the books and completing demonstrations. Video and data collected during the demonstrations are downlinked to the ground and posted in a video library with accompanying educational materials.

Node 3 (N3) Common Cabin Air Assembly (CCAA) Water Separator (WS) Remove & Replace (R&R): In response to water carryover events in excess of six hours, the crew R&Rd the degraded CCAA WS in Node 3 today. The CCAA system is the primary component responsible for the control of temperature and humidity in the USOS segment. An air/water separator is part of this system and is required to control humidity in the ISS. The degraded unit was packed for return on the next available SpaceX vehicle for repair and refurbishment.

Completed Task List Activities:

Saturday JSL panel audit Miniature exercise device Surface Pro charge

Sunday JAXA medical laptop cable connect

Monday EDV stow EMU Electrode Paste Audit Wanted Poster – Self wetting swabs ITCS Jumper Cable Install



Ground Activities:

All activities are complete unless otherwise noted.



JEMRMS SFA extract

JEMAL vent

Look Ahead:

Tuesday, 05/21 (GMT 141):

Payloads:

Time Perception (ESA)

Rodent Research Dissections (NASA)

Veggie PONDS Deact (NASA)

Genes in Space-6 Freeze and Fly Run part 2 (NASA)

MicroAlgae deploy and stow (NASA)

ISS Experience Firmware update and H/W stow (NASA)

Food Acceptability (NASA)

Systems:

JEM condensate sample purge

Wednesday, 05/22 (GMT 142):

Payloads:

BioLab Experiment container install (ESA)

Actiwatch Plus chk (NASA)

BCM Journal (NASA)

JAXA Mouse Mission H/W gather

Rodent Research Dissections (NASA)

Repository urine collections (NASA)

GIS-6 Biomolecular Sequencer stow (NASA)

Team Task Switching (NASA)

MicroAlgae (NASA)

Systems:

SODF update

Today’s Planned Activities:

All activities are complete unless otherwise noted.

