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Fine bubble technology. Evaluation method for determining the reactive oxygen species in ultrafine bubble dispersions. APF (3´-(p-aminophenyl) fluorescein) assay. Original standard BS ISO 24758-2-2025 in PDF full version. Additional info + preview on request

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Natural gas upstream area - Determination and calculation of shale brittleness index - Determination of shale mineral characteristics based on X-ray diffraction method. Original standard BS ISO 24835-1-2025 in PDF full version. Additional info + preview on request

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Natural gas upstream area - Determination and calculation of shale brittleness index - Determination of shale mechanical characteristics based on triaxial testing method. Original standard BS ISO 24835-2-2025 in PDF full version. Additional info + preview on request

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Brown coals and lignites. Classification by types on the basis of total moisture mass fraction and tar yield. Original standard BS ISO 2950-2025 in PDF full version. Additional info + preview on request

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Internships. Quality guidelines for host organizations. Original standard BS ISO 29997-2025 in PDF full version. Additional info + preview on request

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Plain bearings. Hydrodynamic plain journal bearings under steady-state conditions - Calculation of multi-lobed and tilting pad journal bearings. Original standard BS ISO 31657-1-2025 in PDF full version. Additional info + preview on request

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