2015年5月18日星期一

Grandpa's bee

A long time before I was born, my Grandma and grandpa moved into the house on Beechwood Avenue. They had a young family-of 4 little girls .The little girls Slept in the attic in a big feather bed.It was cold there on winter night. Grandma put hot bricks underd the covers at the foot of the bed to keep the little girls warm.

During the Great Depression,work was Hard to find,so Grandpa did hong kong company registration whatever jobs he could.He dug ditches during the week and on Weekend he and Grandma dug a garden to grow some of their own food.

The house on Beechwood Avenue had a big Front yard with shade trees and fruite trees.In the middle of the yard was a water pump where the four little girls pumped water for cooking, cleaning and watering the garden.On one side of the yard,Grandma and Grandpa planted tomatoes,beans,squash,cucumbers,peppers and strawberries to feed their growing family. They planted Roses geraniums lilacs and irises on the other Side of the yard,around the statue of the Blessed Mother.

Eveqbody worked to keep the garden growing.All summer long,the family ate dermes cps food from the garden and enjoyed the beautiful flowers.Grandma put up strawberry jam,tomatoes,beans,peppers,pears and peaches in canning jam.They were good to eat through the long winter.

The family grew up, and before too many years had passed,the grandchildren came to visit. Grandma and Grandpa still planted their garden every spring.Everyone still enjoyed the good food from the garden and always took some home.

Grandchilden grow up,and grandparents grow older.It became harder for Grandma and Grandpa to keep up the garden. So they made it a little smaller.There was still plenty to eat from the garden and lovely flowers to enjoy.

Then one sunmmer when Grandpa was eighty-nine years old, all he could do was watch from his lawn chair as the vegetables grew and the roses bloomed.Summer slowly faded,and Grandpa died before it was time to bring in the harvest.

It was a lonely Winter for Grandma. She sat near the window,looking Server Hosting out at the yard and wondering if she could plant the garden in the spring.It would be hard to care for it by herself. When spring came,she planted only a little garden.

One sunny day in the early summer, Grandma heard a commotion in the front yard and looked out the window to see a frightening sight a gigantic swarm of bees filled the air between two tall trees. There was thousands of bees in the air,so many that the swarm reached the tree-tops!The buzzingsound was tremendous.Grandma watched as the bees made their way into a hole up in one of the trees.Before long,everyone of those bees had disappeard into its new home.

Grandma wondered what in the world she Could do.Should she hair someone to get rid of bees?That would cost more than she could afford.She decided to wait and think it over.

During the next few days,the bees were busy mading their own business.Grandma could always see a few bees buzzing in and out around the opening high in the tree.Before long,she decided the bees won't bother anyone,so she went about her business and didn't give them any other thought.

That summer,Grandma's little garden grew and grew.The neighborns would stop to admire the huge crop of vegetables and puzzle over their own gardens weren't doing well.No matter,because Grandma had enough give some away.Of course,everyone who came to visit was treated to a meal of good things from the garden.

One day,Grandma's brother Frank visited from Arizona.As Granndma made Frank a delicious lunch of squash pan cakes and home made apple sauce,she told him the story about the swam of bees.

Frank said,"in Arizona, the famers often hired beekeepers to set up beehives near their fields.The bees pollinated the crops and helped them to grow."

That was when Grandma realized that her bees had helped with her garden all summer..

"So that's why my little garden had such a big crop!"she exclaimed.

From that Time on,Grandma always believed that since Grandpa couldn't be there to help her that summer,he had sent the bees to take his place and make Grandma's little garden grow and grow…

2015年5月4日星期一

Watch a tiny virus take a constitutional under a laser-powered 3D microscope

If you’re anything like me, you spend a significant portion of the day wondering about the paths viruses take when they’re cruising around your internals. Luckily for us, a newly developed microscope from Duke researchers can show the exact path taken by the little critters (?), down to the micrometer.

The system, designed by a team led by assistant professor Kevin Welsher, isn’t like a traditional microscope. Instead of magnifying an image using natural or augmented light, it scans a laser through a small volume repeatedly and from multiple angles. This illuminates special fluorescent particles, the positions of which can be tracked over time hotel in hong kong.

Attach one of those particles to something else and you can track what it’s doing. It’s kind of like a mocap studio for microbiology. But until recently, those particles were too big to attach to viruses — imagine trying to do your Gollum impression with basketballs taped all over your body. Welsher’s team recently improved the power of the system enough that it can detect much smaller dots — and even fluorescent proteins built right into the virus’s system. The result, as you see up top, is quite a detailed little track!


Simple, right?

I’m reminded of the old Family Circus cartoons, with Billy or whoever going all over the neighborhood, petting dogs, tracking mud on the neighbor’s porch and so on. Except Billy is a lentivirus, and the neighborhood is the soupy exterior of a cell membrane present ideas for boyfriend .

It’s not all just for kicks, of course: The goal is to be able to watch as a virus makes contact with a cell and does whatever it does to penetrate and infect it. That moment, so critical to understanding viral behavior, is poorly understood because it’s been nearly impossible to observe directly.

“What we are trying to investigate is the very first contacts of the virus with the cell surface — how it calls receptors, and how it sheds its envelope,” said Welsher in a Duke news release. “We want to watch that process in real time, and to do that, we need to be able to lock on to the virus right from the first moment.”

With this system, we’re a step closer to understanding one of the most sophisticated biological machines ever created. The team’s work is published this week in the journal of the Optical Society Managed VPN .