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  2. Pitch (resin) - Wikipedia

    en.wikipedia.org/wiki/Pitch_(resin)

    Pitch produced from petroleum may be called bitumen or asphalt, while plant-derived pitch, a resin, is known as rosin in its solid form. Tar is sometimes used interchangeably with pitch, but generally refers to a more liquid substance derived from coal production, including coal tar , or from plants, as in pine tar .

  3. Pitch-based carbon fiber - Wikipedia

    en.wikipedia.org/wiki/Pitch-based_carbon_fiber

    However, the most important in carbon fiber production is mesophase pitch due to the ability to melt spin anisotropic mesophase pitch without filament breakage. The mesophase pitch forms a thermotropic crystal, which allows the pitch to become organized and form linear chains without the use of tension. Mesophase pitch is made by polymerizing ...

  4. Tar - Wikipedia

    en.wikipedia.org/wiki/Tar

    Its main use was in preserving wooden sailing vessels against rot. For centuries, dating back at least to the 14th century, tar was among Sweden's most important exports. Sweden exported 13,000 barrels of tar in 1615 and 227,000 barrels in the peak year of 1863. The largest user was the Royal Navy of the United Kingdom. Demand for tar declined ...

  5. 4 of the Top Prescription Weight Loss Pills & How They Work - AOL

    www.aol.com/4-top-prescription-weight-loss...

    It’s important to understand how the medication works in your body to promote weight loss. Some may suppress appetite, inhibit fat absorption, increase metabolism or affect hormones and ...

  6. List of chemistry mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_chemistry_mnemonics

    A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.

  7. Nassau County flags not lowered to half-staff for Jimmy Carter

    www.aol.com/news/nassau-county-flags-not-lowered...

    A Republican county official on Long Island is refusing to lower flags to half-staff following the death of former President Jimmy Carter.

  8. NYC ‘desperately’ needs to hire more cops to combat ... - AOL

    www.aol.com/nyc-desperately-needs-hire-more...

    Ex-NYPD Commissioner Bill Bratton says the city needs more cops to crack down on subway mayhem and other crime, noting there were thousands more officers when he was first in charge in the 1990s.

  9. Central Board of Secondary Education - Wikipedia

    en.wikipedia.org/wiki/Central_Board_of_Secondary...

    For promotion from Secondary level (Class IX-X) to Senior Secondary level (Class XI-XII), a student must obtain, for all subjects (or best 5 if 6 subjects are taken), 33% overall, without any minimum theory mark requirement. Originally, the passing criteria were set such that a student had to get 33% in both the theory and practical components.

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