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Collection:
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NASA Marshall Space Flight Center Collection
Collection
NASA Marshall Space Flight Center Collection
Collection
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Name of Image:
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Handheld Diffusion Test Cells
Name_of_Image
Handheld Diffusion Test Cells
Name of Image
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Full Description:
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This photo shows an individual cell from the Handheld Diffusion Test Cell (HH-DTC) apparatus flown on the Space Shuttle. Similar cells will be used in the Observable Protein Crystal Growth Apparatus (OPCGA) to be operated aboard the International Space Station (ISS). The principal investigator is Dr. Alex McPherson of the University of California, Irvine. Each individual cell comprises two sample chambers with a rotating center section that isolates the two from each other until the start of the experiment and after it is completed. The cells are made from optical-quality quartz glass to allow photography and interferometric observations. Each cell has a small light-emitting diode and lens to back-light the solution. In protein crystal growth experiments, a precipitating agent such as a salt solution is used to absorb and hold water but repel the protein molecules. This increases the concentration of protein until the molecules nucleate to form crystals. This cell is one of 96 that make up the experiment module portion of the OPCGA.
Full_Description
This photo shows an individual cell from the Handheld Diffusion Test Cell (HH-DTC) apparatus flown on the Space Shuttle. Similar cells will be used in the Observable Protein Crystal Growth Apparatus (OPCGA) to be operated aboard the International Space Station (ISS). The principal investigator is Dr. Alex McPherson of the University of California, Irvine. Each individual cell comprises two sample chambers with a rotating center section that isolates the two from each other until the start of the experiment and after it is completed. The cells are made from optical-quality quartz glass to allow photography and interferometric observations. Each cell has a small light-emitting diode and lens to back-light the solution. In protein crystal growth experiments, a precipitating agent such as a salt solution is used to absorb and hold water but repel the protein molecules. This increases the concentration of protein until the molecules nucleate to form crystals. This cell is one of 96 that make up the experiment module portion of the OPCGA.
Full Description
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Date of Image:
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2001-01-24
Date_of_Image
2001-01-24
Date of Image
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Category:
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Microgravity
Category
Microgravity
Category
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(MRPO) MRD-SPD Discipline(s):
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Biotechnology
(MRPO)_MRD-SPD_Disci pline(s)
Biotechnology
(MRPO) MRD-SPD Discipline(s)
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(MRPO) Subject Type:
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Hardware
(MRPO)_Subject_Type
Hardware
(MRPO) Subject Type
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term:
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HH-DTC
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facet_what:
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Space Shuttle Orbiter
facet_what
Space Shuttle Orbiter
facet_what
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facet_what:
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International Space Station (ISS)
facet_what
International Space Station (ISS)
facet_what
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facet_where:
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California
facet_where
California
facet_where
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facet_where:
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Marshall Space Flight Center (MSFC)
facet_where
Marshall Space Flight Center (MSFC)
facet_where
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facet_where:
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Washington, D.C.
facet_where
Washington, D.C.
facet_where
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Reference Number:
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MSFC-75-SA-4105-2C
Reference_Number
MSFC-75-SA-4105-2C
Reference Number
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MIX #:
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0100136
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NIX #:
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MSFC-0100136
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MSFC Negative Number:
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0100136
MSFC_Negative_Number
0100136
MSFC Negative Number
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UID:
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SPD-MARSH-0100136
UID
SPD-MARSH-0100136
UID
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original url:
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original_url
original url
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