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The No. 1 driver of ice cream cravings is its sweetness, explained Gail Civille, founder and president of Sensory Spectrum, a consulting firm that helps companies learn how sensory cues drive consumer perceptions of products. Ice cream should not be "cloyingly sweet -- so you can eat more of it," Civille said.The amount of fat is important, too. To even be called "ice cream," a product must contain at least 10% milk fat, also called butterfat. Premium ice cream tends to max out around 18% milk fat, which can come from milk, cream or butter."The more butterfat, the better the mouthfeel," said Deanna Simons, the quality manager of Cornell's Dairy Bar, which produces premium ice cream on campus, including flavors such as Kahlua Fudge and Triple Caramel Bliss. Having a lower overrun, a term that refers to the amount of air incorporated into ice cream, also contributes to an appealing mouthfeel, according to Simons.So, sweetness -- which contributes to the taste variable -- and fat -- which contributes to texture and triggers that you've eaten something substantial -- are key players in the likability of any particular ice cream. But Civille also points to another interesting food characteristic that plays a very important role in an ice cream's appeal: control over melt."The melting [of ice cream] gives an additional sensory experience unlike other types of foods, because you don't get the same transformation [from other foods]," explained Alina N. Stelick, a scientist who runs sensory tests on ice cream at Cornell University's Sensory Evaluation Center.The melt should be "not too fast" and "not too slow," which can make an ice cream feel gummy, according to Civille.To better understand the concept of melt, thinks of "mix-ins," such as chocolate chips or nuts. "The ice cream acts as the lubricant," Civille explained. "The ice cream matrix needs to melt slowly enough so you can get at the pieces and chew them and get rid of them before the ice cream is completely gone."Ice cream companies have perfected the concept of melt by adding a minimum amount of fat, or thickeners and gums, which can mimic the effects of fat if done properly, Civille explained. 2184

The information should have been assessed as a "potential threat to life," but the proper protocols weren't followed and the FBI's Miami office was not notified, the agency said. 178

The LAPD issued a citywide tactical alert Thursday night in response to the fire. It allows the department to keep officers beyond the end of their shifts. 155

The outpouring of emotional and short-term support for Puerto Rico and the Virgin Islands has been steady. But we should all settle in for the long, difficult task of supporting millions of our fellow Americans who have lost their homes, their jobs and their hope. 264

The incident occurred on Friday, as the Biden campaign bus was traveling to an event in the Houston area. Though Democratic presidential nominee Joe Biden nor his running mate, Sen. Kamala Harris, were aboard the bus, Texas congressional candidate Wendy Davis was on board.The Texas Tribune reports that dozens of vehicles — as many as 50, many of them flying Trump campaign flags — lined I-35 waiting for the bus to arrive. As soon as the bus began passing, videoes show the cars surrounded the bus. 500

来源：资阳报