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Alex Fung
Lives in Happy Valley, Hong Kong
1,233 followers|865,373 views
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Antibiotic Smart Bomb Targeting Specific Strains Of Bacteria

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Antibiotic ‘Smart Bomb’ Can Target Specific Strains Of Bacteria.

Researchers from North Carolina State University have developed a de facto antibiotic “smart bomb” that can identify specific strains of bacteria and sever their DNA, eliminating the infection. The technique offers a potential approach to treat infections by multi-drug resistant bacteria.

“Conventional antibiotic treatments kill both ‘good’ and ‘bad’ bacteria, leading to unintended consequences, such as opportunistic infections,” says Dr. Chase Beisel, an assistant professor of chemical and biomolecular engineering at NC State and senior author of a paper describing the work. “What we’ve shown in this new work is that it is possible to selectively remove specific strains of bacteria without affecting populations of good bacteria.”

The new approach works by taking advantage of a part of an immune system present in many bacteria called the CRISPR-Cas system. The CRISPR-Cas system protects bacteria from invaders such as viruses by creating small strands of RNA called CRISPR RNAs, which match DNA sequences specific to a given invader. When those CRISPR RNAs find a match, they unleash Cas proteins that cut the DNA.

Read more: http://goo.gl/bvPbjC
Image credit syodokukai.

CRISPR-Cas.org,, http://goo.gl/VU0uLC
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Alex Fung

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Safari is bad, but others are worse

Safari is not a good browser, but on iOS, no other browser can perform better than Safari.

Here is why:

http://www.howtogeek.com/184283/why-third-party-browsers-will-always-be-inferior-to-safari-on-iphone-and-ipad/
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T-Cells break rules when they need to

Strict rules governs T-Cell activation, and the rules are normally adhered to when launching a defense. But when Salmonella comes, the lymphocytes ignore the rules and start working unsolicited.

article:

http://www.futurity.org/t-cells-break-rules-salmonella-attacks/
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Crazy Ants winning over Fire Ants

The Fire Ants are for the first time defeated by another species.


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The spread of the red fire ant in the US seems to be coming to an end, as another imported species - the raspberry crazy ant - is beginning to wipe out its colonies. This type of crazy ant has its own venom which neutralizes the neurotoxin produced by the red fire ant, rendering it immune to its attacks.

The raspberry crazy ant is being introduced in more parts of the US plagued by the red fire ant in an attempt to halt its spread. While the raspberry crazy ant isn't completely harmless with its attraction to electrical equipment, it is generally considered to be the lesser evil of the two.
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Why don't Polar Bears Hibernate?

Brown and black bears hibernate during winter to conserve energy and stay warm. So why don't the polar bears?

article:
http://www.futurity.org/polar-bears-survive-arctics-icy-blasts/

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Why don't Polar Bears Hibernate?

Brown and black bears hibernate during winter to conserve energy and stay warm. So why don't the polar bears?

article:

http://www.futurity.org/polar-bears-survive-arctics-icy-blasts/
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Cool article!  It would have been even more interesting if the chemical had been nitrous oxide.  :^D
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Alex Fung

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Why do Japanese people wear surgical masks?

It’s not always for health reasons.

And before you ask, I'm not Japanese myself.

article:

http://en.rocketnews24.com/2014/02/21/why-do-japanese-people-wear-surgical-masks-its-not-always-for-health-reasons/
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Why Skunks stink but Meerkats don't?

Why some animals use noxious scents while others live in social groups to defend themselves against predators?

article:

http://www.futurity.org/skunks-stink-meerkats-dont/

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Why Skunks stink but Meerkats don't?

Why some animals use noxious scents while others live in social groups to defend themselves against predators?

article:

http://www.futurity.org/skunks-stink-meerkats-dont/
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Gravity Slingshot Explained

Spacecrafts use the slingshot maneuver to gain velocity and travel faster than they could have done by using fuel alone.

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_via +Tom Eigelsbach _
 
The Gravity Slingshot maneuver – the key to the outer Solar System

This shows a spacecraft (green) being sent by two planets in succession. At each flyby, the spacecraft gets a huge boost in speed, essentially for free, from the planet’s motion and gravity.

The gravity slingshot technique was discovered by the Caltech mathematician Michael Minovitch in 1961.  Before the discovery, the outer Solar System seemed to be out of reach, because the rockets required would have been enormously large and expensive. 

During an encounter, the spacecraft “steals” energy and momentum from the planet.

Acknowledgement: I created this animation using the gravity simulation program at http://phet.colorado.edu/en/simulation/my-solar-system
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The mysterious Lactase Persistance

The ability of adults to produce lactase has only evolved within the last ten thousand years under strong natural selection. It has been a mysterious because calcium absorption does not provide the required selection pressure.

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The mysterious Lactase Persistance

The ability of adults to produce lactase has only evolved within the last ten thousand years under strong natural selection. It has been a mysterious because calcium absorption does not provide the required selection pressure.
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Snow rolled up by aliens

They are better looking than the crop circles.

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Snow  Rollers
They are called snow rollers and they look like something out of a Stephen King travel guide to the Arctic Circle - weird, cylindrical snow formations created in the middle of nowhere without the benefit of human touch.

The “strange phenomena,”  are created under very specific conditions: The ground surface must have an icy, crusty snow, on which falling snow cannot stick. About an inch or so of loose, wet snow must accumulate. Gusty and strong winds are needed to scoop out chunks of snow.
Once the “seed” of the snow roller is formed, it begins to roll, pushed by the wind, unimpeded.
It collects additional snow from the ground as it rolls along, leaving trails behind it.

Watch video:
http://www.weather.com/video/snow-rollers-39071
Reference:
http://www.wrh.noaa.gov/otx/photo_gallery/snow_rollers.php
http://en.wikipedia.org/wiki/Snow_roller
Images via Wikimedia Commons
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People
In his circles
430 people
Have him in circles
1,233 people
Work
Occupation
Information Technology
Basic Information
Gender
Male
Other names
馮浩山, Fung Ho San
Story
Tagline
馮浩山 working in the IT field a quarter of a century.
Introduction
Published the best game guide for Looking Glass Studios Thief (Thief Dark Project / Thief Gold and Thief II).

Published a method to restore the Rubik's Cube that does not remember any arbitrary sequences, and as a result I can still do it after 15 years not touching a cube.

Published a French poem on the Paroles magazine of Alliance Française de Hong Kong -- normally student articles only appear in their Paroles Étudiants student magazine.

My PDAs:
  • Palm V
  • HP PPC 2002
  • HP PPC 2003
  • Dopod WM5
  • HTC HD2 WM6.5, Android Gingerbread
  • Samsung Galaxy Note Android Gingerbread - Jelly Bean
My favorite TV programmes:
  • Better off Ted
  • Doll House
  • Fringe
  • Doctor Who
  • The Big Bang Theory
  • 山おんな壁おんな (山女壁女)
  • 雪之女王

My favorite anime:
  • Ranma 1/2 
  • Dragon Ball
  • Neon Genesis Evangelion
  • 涼宮春日的憂鬱
Bragging rights
Have been tolerating the HKSAR Government together with the people of Hong Kong.
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Happy Valley, Hong Kong
菠蘿包又大又好食, 不過片牛油好細, 簡直感覺唔到。
Public - 2 months ago
reviewed 2 months ago
A limited but unusual choice of dishes on the menu. Dishes are not large, but delicious. Last order 22:30.
Food: GoodDecor: GoodService: Very good
Public - 3 months ago
reviewed 3 months ago
仔粥好食, D好正。
Public - 6 months ago
reviewed 6 months ago
Best tonkatsu in Hong Kong. Monday to Friday also offers lunch set at half of regular price!
Public - 6 months ago
reviewed 6 months ago
36 reviews
Map
Map
Map
The signature dish cheese spaghetti is really good. Actually everything we ate was tasty. The soup, the salad and the desert. The mall it is in is a bit out of the way and looks deserted.
Public - 4 months ago
reviewed 4 months ago
抹茶雪糕非常好味(註: 抹茶雪糕和綠茶雪糕是完全不同的)。 抹茶latte 也非常好。 以前以為綠茶加奶會很怪, 在日本茶室試過才知道是很好味的。
Public - 6 months ago
reviewed 6 months ago
月餅好食
Public - 7 months ago
reviewed 7 months ago