NanoRacks-Valley Christian High School-Bacillus Subtilis Bacteria Growth (NanoRacks-VCHS-B. Subtilis) - 09.27.17

Overview | Description | Applications | Operations | Results | Publications | Imagery

ISS Science for Everyone

Science Objectives for Everyone
NanoRacks-Valley Christian High School-Bacillus Subtilis Bacteria Growth (NanoRacks-VCHS-B. Subtilis) is a NanoLab project studying the growth and growth rate of Bacillus subtilis bacteria in microgravity.
Science Results for Everyone
Information Pending

The following content was provided by Valley Christian High School, and is maintained in a database by the ISS Program Science Office.
Experiment Details


Principal Investigator(s)
Valley Christian High School , Valley Christian High School, San Jose, CA, United States

Dan Saldana, Valley Christian High School, San Jose, CA, United States

NanoRacks, LLC, Webster, TX, United States

Sponsoring Space Agency
National Aeronautics and Space Administration (NASA)

Sponsoring Organization
National Laboratory Education (NLE)

Research Benefits
Information Pending

ISS Expedition Duration
September 2011 - May 2012

Expeditions Assigned

Previous Missions
Information Pending

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Experiment Description

Research Overview

  • The goal of NanoRacks-Valley Christian High School-Bacillus Subtilis Bacteria Growth (NanoRacks-VCHS-B. Subtilis) is to suspend and reanimate the bacteria, Bacillus subtillus, in space and analyze its potential usefulness in disposing of hazardous waste. Through this experiment, a bacteria-sustaining broth is created, as well as, a method to prompt the bacteria to hibernate.
  • Research is important for understanding concepts and reviewing background information concerning the experiments. NanoRacks-VCHS-B. Subtilis research and insight on bacteria help experimenters design future projects, specifically with future partner schools Valley Christian High School is teaming up with.
  • NanoRacks-VCHS-B. Subtilis research is used to increase the general public’s knowledge and to bring space research to a high school level. The research will also help future schools replicate the experiment and perform their own unique projects.


NanoRacks-Valley Christian High School-Bacillus Subtilis Bacteria Growth (NanoRacks-VCHS-B. Subtilis) examines the growth of Bacillus subtilis (B. subtilis) in microgravity. The bacteria are in dried stasis endospore mode (powder) in a bag, allowing the bacteria to survive in its dormant state until it reaches the International Space Station (ISS). Once aboard the ISS, the bacteria are invigorated by a nutrient enriched broth, which causes it to grow. The growth rate of the bacteria is determined by using two methods. First, using three light sensors, the amount of light from twelve LEDs that passed through the bacteria and broth mixture is measured. As more bacteria grow within the broth, less light is able to penetrate the bacterial broth. This is due to the accumulating bacteria eventually clouding the mixture. The second method utilized is to take a series of photos from a mounted camera within the Microlab. These pictures provide a qualitative depiction of the cloudy broth and bacterial colony.

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Space Applications
In order to ensure crew health during space flight and long duration missions, an understanding of how bacteria behave in microgravity leads to better prevention and treatment of infections.

Earth Applications

NanoRacks-VCHS-B. Subtilis allows students at Valley Christian High School to participate in an out of this world experiment to determine how microgravity affects the growth of bacteria. A better understanding of bacterial behavior on earth is accomplished by studying the fundamental properties of bacterial growth in microgravity.

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Operational Requirements and Protocols
NanoRacks Module-18 is completely autonomous and only requires installation and removal. NanoRacks Module–18 does not return to earth.
Crew interaction with Module-18 is limited to transferring the NanoRacks locker Insert from the launch vehicle to the ISS, installation and activation of the NanoRacks Frames into the EXPRESS Rack Locker, cleaning of the air inlet filter (as necessary), and data retrieval (as needed) during the mission.

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Decadal Survey Recommendations

Information Pending

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Results/More Information

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Related Websites

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