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  2. Toroidal propeller - Wikipedia

    en.wikipedia.org/wiki/Toroidal_propeller

    A simple 3 blade toroidal propeller. A toroidal propeller is a type of propeller that is ring-shaped with each blade forming a closed loop. The propellers are significantly quieter at audible frequency ranges, between 20 Hz and 20 kHz, while generating comparable thrust to traditional propellers. In practice, toroidal propellers reduce noise ...

  3. Toroidal - Wikipedia

    en.wikipedia.org/wiki/Toroidal

    Toroidal inductors and transformers, a type of electrical device using magnetic cores with a ring or donut shape; Toroidal propeller, a loop-shaped propeller used in aviation and maritime transport; Toroidal reflector, a reflector whose surface is a section of a torus which has a different focal distance depending on the angle of the mirror

  4. Nicotinic acid - Wikipedia

    en.wikipedia.org/wiki/Nicotinic_acid

    For humans, the efficiency of conversion is estimated as requiring 60 mg of tryptophan to make 1 mg of niacin. Riboflavin , vitamin B 6 and iron are required for the process. [ 20 ] Pellagra is a consequence of a corn-dominant diet because the niacin in corn is poorly bioavailable and corn proteins are low in tryptophan compared to wheat and ...

  5. Category:Propellers - Wikipedia

    en.wikipedia.org/wiki/Category:Propellers

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  6. Nicotinamide mononucleotide - Wikipedia

    en.wikipedia.org/wiki/Nicotinamide_mononucleotide

    However, no human studies to date have properly proven its anti-aging effects with proposed health benefits only suggested through research done in vitro or through animal models. [9] Single-dose administration of up to 500 mg was shown safe in men in a study at Keio University . [ 10 ]

  7. Toroidal inductors and transformers - Wikipedia

    en.wikipedia.org/wiki/Toroidal_inductors_and...

    Toroidal inductors and transformers are inductors and transformers which use magnetic cores with a toroidal (ring or donut) shape. They are passive electronic components , consisting of a circular ring or donut shaped magnetic core of ferromagnetic material such as laminated iron , iron powder, or ferrite , around which wire is wound.

  8. Talk:Toroidal propeller - Wikipedia

    en.wikipedia.org/wiki/Talk:Toroidal_propeller

    In air at least, much of the noise in a propeller or rotor is generated due to blade vortex interaction. Closed-wing/annular designs are known to reduce the shedding of tip-vortices, and designs that reduce tip-vortices are known to reduce the noise (e.g. fenestrons or ducted fans).

  9. Inositol nicotinate - Wikipedia

    en.wikipedia.org/wiki/Inositol_nicotinate

    Liver disease or kidney disease: Niacin can accumulate in people with liver or kidney problems, potentially worsening their condition. [ 1 ] Bleeding disorders : Inositol nicotinate may slow blood clotting, increasing the risk of bleeding for individuals with clotting disorders or those undergoing surgery.

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