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Related Concept Videos

Bone Markings01:26

Bone Markings

Bones have various surface features that help form joints and attach to other soft tissues. Depending on the function, bone markings are categorized into articulating projections, processes for attachment, depressions, and openings.
Articulating Projections
Articulating projections are found where two bones meet to form a joint. These structures are usually found at the ends of bones. The largest articulation is a rounded projection called the head, supported by a narrow neck at the ends of...
Types of Building Stone01:30

Types of Building Stone

Building stones, essential materials for construction, are extracted from natural rock deposits and processed into specific forms and dimensions suitable for various building applications. These stones are broadly classified into three types based on their geological formation: igneous, sedimentary, and metamorphic.
Igneous rocks are formed from the solidification of magma or lava. An example is granite, known for its durability and resistance to weathering, making it ideal for parts of...
Quarrying of Stone01:15

Quarrying of Stone

Quarrying is the process of extracting stone from a quarry, where specialized techniques are employed to remove large blocks of stone safely and efficiently. This process can involve controlled explosions or more precision-oriented methods such as cutting and drilling.
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the block.
Stone Masonry01:29

Stone Masonry

Stone masonry is a construction technique that uses individual stones to build structures and can be categorized into two main types: rubble and ashlar. Rubble masonry uses uneven, naturally shaped stones such as river rocks or fragments from quarries. This method often requires the mason to select and possibly shape each stone to fit the designated space, ensuring a proper build, even with irregular stone sizes and shapes. Ashlar masonry, on the other hand, employs uniformly cut stones that...
Porosity and Absorption of Aggregate01:20

Porosity and Absorption of Aggregate

Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the aggregate...
Urinary Tract Calculi I: Introduction01:28

Urinary Tract Calculi I: Introduction

Renal calculi, or kidney stones, are solid deposits of minerals and salts formed inside the kidneys. In medical terminology, "calculus" refers to the stone itself, while "lithiasis" describes the process of stone formation. Depending on their location within the urinary system, these stones may be classified as either urolithiasis, when situated within the urinary tract, or nephrolithiasis, when located within the kidneys. Each term signifies the specific impact of the stone.Predisposition...

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Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

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Same author

IS THE COLOR OF THE NATURAL RUBY DUE TO IRON?

Science (New York, N.Y.)·1934
Same author

BEYOND URANIUM WITH THE MAGNETOOPTIC METHOD OF ANALYSIS.

Science (New York, N.Y.)·1934
Same author

THE INORGANIC CONSTITUENTS OF MILK.

Science (New York, N.Y.)·1929
Same author

The Detection of Uranium by a Photoluminescence Test.

Proceedings of the National Academy of Sciences of the United States of America·1927

Related Experiment Video

Updated: Jul 8, 2026

Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
09:31

Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS

Published on: August 31, 2017

OCCURRENCE OF GERMANIUM AND ARSENIC IN METEORITES.

J Papish, Z M Hanford

    Science (New York, N.Y.)
    |March 7, 1930
    PubMed
    Summary

    Spectroscopic analysis confirmed trace amounts of germanium in siderites, siderolites, and aerolites. Germanium and arsenic were successfully extracted from the Toluca and Welland siderite meteorites.

    Area of Science:

    • Geochemistry
    • Cosmochemistry
    • Analytical Chemistry

    Background:

    • Meteorites provide insights into extraterrestrial material composition.
    • Previous studies have identified various trace elements in meteorites.

    Purpose of the Study:

    • To investigate the presence of germanium in specific meteorite types.
    • To extract and confirm germanium and arsenic from selected siderites.

    Main Methods:

    • Spectroscopic analysis was employed to detect germanium.
    • Chemical extraction techniques were used for element isolation.

    Main Results:

    • Spectroscopic evidence confirmed the occurrence of germanium in siderites, siderolites, and aerolites.
    • Germanium was detected in trace quantities, indicated by spectral line intensity.

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    Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.
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    Last Updated: Jul 8, 2026

    Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
    09:31

    Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS

    Published on: August 31, 2017

    In Situ Characterization of Boehmite Particles in Water Using Liquid SEM
    11:59

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    Published on: September 27, 2017

    Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.
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    Published on: June 4, 2021

  • Germanium and arsenic were successfully extracted from the Toluca and Welland siderite samples.

    • Conclusions:

    • Germanium is present in trace amounts in certain meteorites.
    • The extraction of germanium and arsenic from specific siderites is feasible.
    • This study contributes to understanding the elemental composition of meteorites.