Related Concept Videos
01:40Archival Research
Some researchers gain access to large amounts of data without interacting with a single research participant. Instead, they use existing records to answer various research questions. This type of research approach is known as archival research. Archival research relies on looking at past records or data sets to look for interesting patterns or relationships. For example, a researcher might access the academic records of all individuals who enrolled in college within the past ten years and...
02:31In-situ Hybridization
In situ hybridization (ISH) is a technique used to detect and localize specific DNA or RNA molecules in cells, tissue, or tissue sections using a labeled probe. The technique was first used in 1969 for the investigation of nucleic acids. It is currently an essential tool in scientific research and clinical settings, especially for diagnostic purposes.
Types of probes and labels
A probe is a complementary strand of DNA or RNA that binds to corresponding nucleotide sequences in a cell. Many...
Types of probes and labels
A probe is a complementary strand of DNA or RNA that binds to corresponding nucleotide sequences in a cell. Many...
01:18Methods of Documentation I: Source-Oriented Records
Source-oriented records, or SOR, are medical record-keeping organized by the data source. The SOR system was first developed in the mid-1900s to organize the growing patient data in hospitals and other healthcare facilities.
In an SOR, each discipline involved in patient care maintains a separate medical record section. This record-keeping method enables easy tracking of patient progress and ensures healthcare staff have access to up-to-date information.
Key Attributes include the following:
In an SOR, each discipline involved in patient care maintains a separate medical record section. This record-keeping method enables easy tracking of patient progress and ensures healthcare staff have access to up-to-date information.
Key Attributes include the following:
01:26Methods of Documentation IV: Focus Charting
Focus Charting, also known as the focus charting system or "focus documentation," is a systematic documentation approach used in healthcare to organize patient information in medical records.
It typically involves three columns for recording information:
It typically involves three columns for recording information:
01:18Imaging Biological Samples with Optical Microscopy
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
01:22Overview of Microscopy Techniques
The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...
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Related Experiment Video
Updated: Jul 11, 2026
06:49
A Standardized Approach to Extra-Oral and Intra-Oral Digital Photography
Published on: July 22, 2022
Photographic Documentation in Archeological Research: Increasing the Information Content.
Science (New York, N.Y.)
|May 21, 1965
Summary
Photography using polarized light significantly improved the observation of ancient seals. This technique enhanced the visibility of surface details and inscriptions, aiding in better record-keeping.
Area of Science:
- Archaeological science
- Imaging technology
- Material analysis
Background:
- Ancient seals are crucial artifacts for historical and cultural studies.
- Detailed observation of seal surfaces is often challenging due to wear and inscription complexity.
- Existing photographic methods may not fully capture the intricate details of intaglio carvings.
Purpose of the Study:
- To develop an improved photographic method for observing ancient seals.
- To enhance the visibility of surface details and inscriptions on seals.
- To create more accurate and informative records of seal observations.
Main Methods:
- Objects were photographed at two angles using polarized light.
- Positive transparencies were combined with negatives in registration.
Main Results:
- The method successfully reversed intaglio carvings to a relief-like appearance.
- Significantly increased contrast and detail of the cut surfaces were achieved.
- Improved photographic records providing clearer observations of ancient seals were obtained.
Conclusions:
- Polarized light photography offers a superior method for documenting ancient seals.
- This technique enhances the interpretability of seal inscriptions and surface features.
- The improved records facilitate more accurate analysis and understanding of these historical artifacts.