How plants grow up

see how children grow

it is necessary for community health nurses to be aware of children growth velocity as well as their height. this is a report of joan arton’s study on primary schools children. traditionally children health indicators were based on if they gain enough weight or not. although today it is proved that height is a better index for children health, but measuring height alone is not enough and growth...

"I Won't Grow Up"

How do quasicrystals grow?

Using molecular simulations, we show that the aperiodic growth of quasicrystals is controlled by the ability of the growing quasicrystal nucleus to incorporate kinetically trapped atoms into the solid phase with minimal rearrangement. In the system under investigation, which forms a dodecagonal quasicrystal, we show that this process occurs through the assimilation of stable icosahedral cluster...

How pollen tubes grow.

Sexual reproduction of flowering plants depends on delivery of the sperm to the egg, which occurs through a long, polarized projection of a pollen cell, called the pollen tube. The pollen tube grows exclusively at its tip, and this growth is distinguished by very fast rates and reaches extended lengths. Thus, one of the most fascinating aspects of pollen biology is the question of how enough ce...

Grow up? Not so fast.

Michele, Ellen, Nathan, Corinne, Marcus and Jennie are friends. All of them live in Chicago. They go out three nights a week, sometimes more. Each of them has had several jobs since college; Ellen is on her 17th, counting internships, since 1996. They don’t own homes. They change apartments frequently. None of them are married, none have children. All of them are from 24 to 28 years old. Thirty...