WOLF
The lone wolf’s howl has long been chosen as a symbol of melancholy and
loss. Now researchers have demonstrated that the choice was accurate.
Howling is not related to the stress
level of the crying canine or the dominance status of the departing
wolf; the best predictor of a wolf’s howl is the closeness of the
howler’s relationship with the wolf leaving its side. The study is in
the journal Current Biology. [Francesco Mazzini et al., Wolf howling is mediated by relationship quality rather than underlying emotional stress]
The researchers separated individuals living in Austria’s Wolf Science
Center. They recorded the resulting howls for 20 minutes after
separation. Then the scientists took a sample of saliva from the howling
wolves to measure circulating levels of cortisol, a hormonal stress
indicator.
Cortisol levels increased during all separations, whether a preferred
partner or any other pack mate was taken away. But howling was much more
pronounced when a close partner was removed.
The researchers thus concluded that the level of howling was determined
by the relationship of the howler with the separated wolf, regardless of
the removed wolf’s rank. Because even a wolf, apparently, can have a
best friend.
—Arielle Duhaime-Ross
Science can purify religion from error and superstition. Religion can purify science from idolatry and false absolutes. Pope John Paul II
Monday, September 16
SCIENCE NEWS - STAYING HEALTHY TAKES GUTS #9
GUTS
Everywhere you go, the trillions of microbes in your gut go too. And that's a comforting thought. Because according to a new study, a more diverse population of intestinal bacteria is linked to better health. The work is in the journal Nature. [Emmanuelle Le Chatelier et al., Richness of human gut microbiome correlates with metabolic markers]
Danish researchers gathered gut microbes from almost 300 obese and nonobese adults. The intestines of roughly one in four participants contained fewer and less diverse bacteria than average. And members of this group were more likely to be obese and to suffer from gut inflammation.
By looking for only a few specific bacteria, researchers could predict whether a subject fell into the low-diversity group. Certain species could even indicate whether an individual was slim or overweight. And these microbial markers might also serve as signs of future health risks—because low-diversity participants who were obese were more likely to gain additional weight over time.
But a low-diversity gut won't necessarily doom your health. According to another study in the same journal, it's possible to increase microbial diversity by developing a decent diet. Remember, you’re eating for trillions.
—Sophie Bushwick
Everywhere you go, the trillions of microbes in your gut go too. And that's a comforting thought. Because according to a new study, a more diverse population of intestinal bacteria is linked to better health. The work is in the journal Nature. [Emmanuelle Le Chatelier et al., Richness of human gut microbiome correlates with metabolic markers]
Danish researchers gathered gut microbes from almost 300 obese and nonobese adults. The intestines of roughly one in four participants contained fewer and less diverse bacteria than average. And members of this group were more likely to be obese and to suffer from gut inflammation.
By looking for only a few specific bacteria, researchers could predict whether a subject fell into the low-diversity group. Certain species could even indicate whether an individual was slim or overweight. And these microbial markers might also serve as signs of future health risks—because low-diversity participants who were obese were more likely to gain additional weight over time.
But a low-diversity gut won't necessarily doom your health. According to another study in the same journal, it's possible to increase microbial diversity by developing a decent diet. Remember, you’re eating for trillions.
—Sophie Bushwick
Labels:
SCIENCE NEWS
Wednesday, September 11
MICROSCOPE
MICROSCOPE MODULES
Watch Microscope Modules & complete the hand-out
1 PARTS OF A MICROSCOPE I
2 USING A MICROSCOPE
3 PARTS OF A MICROSCOPE II
4 PARTS OF A MICROSCOPE III
5 PARTS OF A MICROSCOPE IV
6 PARTS OF A MICROSCOPE V
7 MICROSCOPE SLIDES
8 PARTS OF A MICROSCOPE VI
9
Watch Microscope Modules & complete the hand-out
1 PARTS OF A MICROSCOPE I
2 USING A MICROSCOPE
3 PARTS OF A MICROSCOPE II
4 PARTS OF A MICROSCOPE III
5 PARTS OF A MICROSCOPE IV
6 PARTS OF A MICROSCOPE V
7 MICROSCOPE SLIDES
8 PARTS OF A MICROSCOPE VI
9
Labels:
LAB
Tuesday, September 10
FIRE SAFETY
LAB EQUIPMENT TERMS & USES
P A S S
Pull the Pin at the top of the extinguisher. The pin releases a locking mechanism and will allow you to discharge the extinguisher.
Aim at the base of the fire, not the flames. This is important - in order to put out the fire, you must extinguish the fuel.
Squeeze the lever slowly. This will release the extinguishing agent in the extinguisher. If the handle is released, the discharge will stop.
Sweep from side to side. Using a sweeping motion, move the fire extinguisher back and forth until the fire is completely out. Operate the extinguisher from a safe distance, several feet away, and then move towards the fire once it starts to diminish. Be sure to read the instructions on your fire extinguisher - different fire extinguishers recommend operating them from different distances.
Remember: Aim at the base of the fire, not at the flames!!!!
It's easy to remember how to use a fire extinguisher if you can remember the acronym PASS, which stands for Pull, Aim,Squeeze, and Sweep.
P A S S
Pull the Pin at the top of the extinguisher. The pin releases a locking mechanism and will allow you to discharge the extinguisher.
Aim at the base of the fire, not the flames. This is important - in order to put out the fire, you must extinguish the fuel.
Squeeze the lever slowly. This will release the extinguishing agent in the extinguisher. If the handle is released, the discharge will stop.
Sweep from side to side. Using a sweeping motion, move the fire extinguisher back and forth until the fire is completely out. Operate the extinguisher from a safe distance, several feet away, and then move towards the fire once it starts to diminish. Be sure to read the instructions on your fire extinguisher - different fire extinguishers recommend operating them from different distances.
Remember: Aim at the base of the fire, not at the flames!!!!
How To Use a Fire Extinguisher
PASS = Pull, Aim, Squeeze & Sweep with a Fire Extinguisher
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Pull the pin. This will allow you to discharge the extinguisher.
|
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Aim at the base of the fire. If you aim at the flames (which is frequently the temptation), the extinguishing agent will fly right through and do no good. You want to hit the fuel.
|
![]() |
Squeeze the top handle or lever.
This depresses a button that releases the pressurized extinguishing agent in the extinguisher. |
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Sweep from side to side
until the fire is completely out. Start using the extinguisher from a safe distance away, then move forward. Once the fire is out, keep an eye on the area in case it re-ignites. |
Labels:
LAB
Monday, September 9
Thursday, September 5
LAB SAFETY SITUATIONS & CARE RESPONSE
SITUATION |
SAFE RESPONSE
|
Burns
|
Flush with
cold water
|
Cuts &
Bruises
|
Treat as
directed by instructions included with first aid kit
|
Fainting
or collapse
|
Provide
person with fresh air, have him recline in a position so that his head is
lower than their body; if necessary, provide CPR
|
Fire
|
Turn off
all flames and gas jets, wrap person in fire blanket; use fire extinguisher
to put out fire. DO NOT use water to put out fire.
|
Foreign
Matter in Eyes
|
Flush
about 15 min with plenty of water, then go to the doctor
|
Poisoning
|
Note the
suspected poisoning agent, contact the teacher for antidote; call poison
control center if more help is needed
|
Severe
bleeding
|
Apply
pressure or a compress directly to the wound and get medical attention immediately
|
1. Spills,
general
2. Acid burns 3. Base burns |
1. Wash
area with plenty of water, use safety shower if needed
2. Use sodium hydrogen carbonate (baking soda) 3. Use boric acid or vinegar |
Labels:
LAB
Wednesday, September 4
LAB SAFETY VIOLATIONS - STORY
LABORATORY SAFETY RULES
- Read the following story;
- on notebook paper list all lab safety violations, number each one.
- highlight on this handout the broken safety violations.
- DUE: 9/10/2013, TUESDAY
The bell
rang, students sat in their seats, and they began to write down their homework.
Ryan eagerly asked Mrs. Remis, “What are
we doing today?” Mrs. Remis impatiently
said, “As always Ryan grab your chair, check on the white board and let me get
us all started.” Ryan responded, “Oh
yeah, there it is, we have a Chemistry lab.” Mrs. Remis gave the class a brief overview of
what they would be doing during the lab and she stressed to the class, “Please be sure to follow appropriate lab
safety procedures.”
Ryan and John
sprinted to a lab station, yelling, “We got this station!” Once at the station,
Ryan asked John if he read the lab last night for homework to which John
replied, “Nope, did you?” Ryan responded
to John’s question by saying, “Are you serious, I never read anything for this
class.” They both looked at each other and decided to just start the lab. “Ryan,
you go get the chemicals and I’ll light up the Bunsen burner,” said John. Even
though all of their classmates went to the safety goggle cabinet prior to
starting the lab, Ryan and John decided not to go. John said in a smug way, “Forget the goggles;
we are too cool to wear those things.” Ryan
walked up to the front lab bench where the chemicals were, removed the lids,
picked up the flasks, and started to smell the different chemicals. “I am just
going to bring back the ones that smell the best,” said Ryan. Little did Ryan
know that one of the chemicals was sulfuric acid, and after taking a deep
breath, he thought that his nose hairs were on fire. “Hey Ryan, you didn’t even put the lid back
on,” yelled Mrs. Remis. Ryan ignored Mrs.
Remis and somehow he made it back to his lab station without passing out. Upon
making his way back to the lab station, Ryan saw John trying to light the
Bunsen burner. “John, John, your hair!” Ryan yelled in an excited voice.
“That was a
close one,” said John. “My mother has been telling me to get a haircut. I guess
I really need one now that I just lost a big chunk of my hair.” The two
partners then proceeded with the lab. Ryan reached across the flame in order to
get a beaker filled with acetic acid while John grabbed a test tube to put the
chemical in. “Oops!” said Ryan, “I just
spilled some of the chemicals on the tabletop. I’ll just wipe it up with my
shirt sleeve.” “Should you tell Mrs. Remis?”
John asked. “No, it isn’t a big deal, I
already wiped it up,” Ryan nonchalantly said. A few seconds later, Ryan said,
“Man, my arm is warm.” In an excited
voice, John said, “Oh my Gosh, look at your shirt, there is a hole in it. That chemical
you wiped up must have eaten through your shirt. How is your arm?” Ryan said, “It hurts a little, but I will be
fine.” “Should we tell Mrs. Remis?”
asked John. “No, I’ll be fine,” Ryan
said confidently. The lab partners then poured some chemicals into a test tube
to begin heating. “Ryan, do you see that crack in the test tube?” questioned
John. “Who cares,” Ryan whispered. “As
long as the test tube is not leaking, it must be fine.” The boys proceeded to
heat the test tube. Ryan asked, “Is anything happening?” “I don’t know, point the test tube in this
direction so that I can look into the opening,” John replied. “Maybe we should just add some of the other
chemicals if nothing is happening yet,” said Ryan. “Should we ask Mrs. Remis?” wondered John. “No,
she is annoying,” Ryan smugly said. Ryan then continued, “She will first ask us
if we read all of the procedures and then he will say, ‘I put a lot of time and
effort into writing these labs for you guys and the least you could do is read
them. If you have read it and then have additional questions, I would be more
than happy to help you, but you have to do your part first.’ I certainly don’t want to hear all of that, do
you?” “Definitely not, I hate when
teachers go ranting,” said John. The lab
partners proceeded to add some random chemicals to the test tube. Shortly thereafter, the contents of the test
tube began to bubble over. “Wow that was amazing!” Ryan yelled. “Yeah, that was pretty cool, but it is
everywhere,” John said in a concerned voice. “Good thing we have all of these
papers laying around our lab station because most of the chemicals have just
spilled onto them. We can just throw all of the papers into the garbage,” Ryan
said confidently. “Hey, it got onto my
planner,” John said in an annoyed voice. “Who cares, just go to guidance and buy
another one for four dollars and fifty cents. Oh, I’m sorry, I mean you can get
one for four dollars and Fitty Cent. Get it, Get it!” Ryan said in a joking
manner. The students began to clean up
the spilled chemicals when John said, “This stuff smells really good, kind of
like lemonade.” “Well, if it smells like
lemonade, it must be lemonade, just taste it,” Ryan said in a convincing
manner. John proceeded to taste the
chemical mixture by sipping what was left in the test tube. “Oh man, the bell is going to ring soon,” Ryan
said in a rushed voice. “Just leave it,
I really want to go to lunch because it is Taco Day,” John said. “Are you sure?” Ryan questioned. “Yeah let’s just get out of here; the next
class is going to be doing the lab again anyway, so they can clean it up,” John
said. Without washing their hands, Ryan
and John left the classroom and headed to lunch.
Labels:
LAB
SCIENCE NEWS - PERIODIC TABLE #7
You've probably seen it in every science classroom you've been in, but what's the story behind the Periodic Table of Elements? Find out in today's Stuff of Genius!
Labels:
SCIENCE NEWS
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