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Protein Structure - Primary, Secondary, Tertiary, & Quarternary - Biology
This biology video tutorial provides a basic introduction into the four levels of protein structure - primary, secondary, tertiary and quarternary structure. The primary structure of a protein is based on the sequence of amino acids. The secondary structure is based on localized shapes such as the alpha helix or the beta pleated sheet. The ...
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Video by Adam / FDNY firefighter Patrick Brady, a 42-year-old 11-year veteran from a multigenerational firefighting family, died of a heart attack while battling a six-story apartment building blaze in Brownsville, Brooklyn, on November 8, 2025. Brady suffered cardiac arrest on the roof of the burning structure on Kings Highway and was pronounced dead at Brookdale University Hospital despite immediate treatment. Four other firefighters and one civilian sustained minor injuries. Mayor Eric Adams
Video by Adam / FDNY firefighter Patrick Brady, a 42-year-old 11-year veteran from a multigenerational firefighting family, died of a heart attack while battling a six-story apartment building blaze in Brownsville, Brooklyn, on November 8, 2025. Brady suffered cardiac arrest on the roof of the burning structure on Kings Highway and was pronounced dead at Brookdale University Hospital despite immediate treatment. Four other firefighters and one civilian sustained minor injuries. Mayor Eric Adams
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Darrell Riddick the 1st on Instagram: "New Shoes!!!! #rescue #rescue2 #picoftheday #photooftheday #photography #firefightersofinstagram #saltactual #firefighterposts #fire #firefighter #firefighters #firedepartment #instagood #followme #fireman #firetruck #firehouse #firefighting #fdny #fypage #fyp #explorepage #newyork #newyorkcity #ny #nyc #nycphotography #bk #brooklyn#RiddickR2"
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