2020年6月1日 · Memories linked to smells can form because of good and bad feelings. But what about things that you know smell good or bad even if you’ve never experienced them? Scientists have found...

2007年9月21日 · Researchers have found that heavier, more spread-out molecules tend to smell worse than lighter, more compact molecules, although exceptions to the rule exist. The finding can be used to predict...

2014年12月16日 · Good odors are important signals when animals search for food or a mating partner. Female insects also use olfactory signals to select a good oviposition place. Bad smells, on the other hand,...

Ten basic smells that a human nose can sense include: Fruit: Human nose may sense all types of fruity smells. They are natural aromas (except for citruses like lemon, lime, and orange). Lemon: Lemon or citrus is usually used for cleaning products for decades. They smell sharp and fresh. Fragrant: Fragrant scents are light and natural.

2021年2月26日 · Smell is fundamental to our experience and linked with a variety of emotional responses. Some smells repel us, while some invite us in. They’re a vital part of our world and our survival strategy. Without smell we become more depressed and, conversely, when we’re depressed we can’t smell as well.

2020年6月1日 · Memories linked to smells can form because of good and bad feelings. Smells to warn you. But what about things that you know smell good or bad even if you’ve never experienced them? Scientists have found that although a lot of the smells people like come from past experiences, instincts play a big role.

Often what you're smelling is sulfate compounds, which commonly occur where there's decomposition by anaerobic bacteria. Sulfur smells pretty bad on its own, and it can be poisonous, and when you add oxygen (the -ate in sulfate) it just gets worse. Fun fact, garlic gets its smell from selenium, the next element in the same column as sulfur.

Yes, we have evolved a higher sensitivity to smells that indicate poison or danger. Rotten fish, for example, smells so disgusting because it's teeming with bacteria, and we've evolved to …

2020年11月11日 · This document discusses good smells and bad smells. Good smells include perfume, soap, baby powder, baby cologne, lotion, baby shampoo, sampaguita, ripe mango, and orange, which people like to smell more of. Bad smells include dead rat, cockroach, slate fish, dirty drainage water, garbage, varnish, insect spray, and paint, which people cover ...

2020年1月8日 · Are there really good and bad smells? We generally talk about pleasant fragrances that rekindle positive emotions. Flowery scents, spicy fragrances or gourmand perfumes help to titillate your senses and bring a positive sensory experience to you.