Attention deficit hyperactivity disorder has three subtypes, which vary by the presentation of symptoms. With predominantly inattentive ADHD, the patient has six or more symptoms that fall into the inattentive category.n particular, ADHD patients have variations on the transporter genes for these neurotransmitters. For example, patients with predominantly inattentive ADHD had changes to their norepinephrine transporter gene, which affects norepinephrine levels in their brains.
The Zumwalt class warships are the largest destroyer ever built. Actually in terms of size, displacement and armament these are closer to cruisers rather than destroyers. The Zumwalt class ships are even larger than Ticonderoga class cruisers. These new vessels sport cutting-edge technology and are stealthy to radars.
It operates 19 heavy lift transport ships, the world's largest such fleet. The MV Blue Marlin is the crown jewel among that armada. At 738-feet long, with a gross tonnage of 56,000 metric tons, and a deck larger than two American football fields, it's the largest semi-submersible ship on Earth. The Blue Marlin is outfitted with 38 cabins, accommodates 60 people, and even features a workout room, sauna and swimming facilities.