Studying chemistry is a complex but potentially lucrative activity. If you're studying ionic compounds and need some help understanding how they work, look no further. THis video will explain how the two types of ions: anions and cations, and energy combine to create an ionic compound.
Tim Carter, of Ask the Builder, demonstrates an easy way to get smooth corners with a joint compound in your drywall remodel work in your house. Home repair has never been easier.
A Teacher shows us how to graph compound sentences with the word "or" in them. These graphs will have arrows pointing out in different directions. On the number line draw arrows from the numbers in your compound sentence. So for example if after solving a problem with inequalities the problem has two possible answers that it could be, you would record both of the answers that it could possibly be. For our example we will use x is greater than seven, and x is less than three. You would then dr...
A rose by any other name may smell as sweet, but one annoying invasive weed may hold the answer to treating the superbug MRSA. Researchers from Emory University have found that the red berries of the Brazilian peppertree contain a compound that turns off a gene vital to the drug-resistance process.
Our quest to find novel compounds in nature that we can use against human diseases —a process called bioprospecting — has led a research team to a small frog found in India. From the skin slime of the colorful Hydrophylax bahuvistara, researchers reported finding a peptide — a small piece of protein — that can destroy many strains of human flu and can even protect mice against the flu.
Find out how everything in a chemistry lab works, from pipettes to burners to recrystallization to storage. You'll get precise instructions on how to work and perform certain scientific duties in the chem lab, whether it's chemical or just ordinary high school science.
Find out how everything in a chemistry lab works, from pipettes to burners to recrystallization to storage. You'll get precise instructions on how to work and perform certain scientific duties in the chem lab, whether it's chemical or just ordinary high school science.
Aqua regia (königswasser in German) is a very corrosive liquid made from a mixture of nitric acid and hydrochloric acid (1:2 - 1:3). This chemical mixture is so corrosive that it can even dissolve gold, and that's what you'll learn about in this video.
Try out this science experiment... watch this video tutorial to learn how to illustrate the scientific concept of conservation of mass. This is purely educational, and not as exciting as some other demonstrations, but this does clearly illustrate the concept of conservation of mass.
Cytochrome P450 (P450s) are proteins found in nearly all living organisms, which play roles that range from producing essential compounds and hormones to metabolizing drugs and toxins. We use some of the compounds synthesized by P450 in plants as medical treatments, but the slow growth and limited supply of these plants have put the drugs' availability in jeopardy and jacked up prices.
Some types of bacterial infections are notoriously tough to treat — and it's not all due to antibiotic resistance. The bacteria themselves are rugged and hard to penetrate with drugs.
Chemguy AKA Rob reviews the various diagrams in organic chemistry. This is a 16 part series from this Canadian high school Chemistry teacher.
In the ongoing search to find better ways to use antibiotics, an extract made from maple syrup has some surprisingly important medical benefits.
This experiment is intended to introduce students to hydrated compounds. These compounds have water molecules coordinated in their chemical structures. Examples CuSO4*5H2O, BaCl2*2H2O, and NaC2H3O2*3H2O.
In this free video science lesson from Internet pedagogical superstar Salman Khan, you'll learn how to work with stereoisomers, enantiomers, diastereomers, constitutional isomers and meso compounds in organic chemistry. Whether you need help studying for that next big test or could just use a hand finishing your homework, you're sure to be well served by this video lesson. For more information, including detailed, step-by-step instructions, take a look.
Whether you're interested in learning Microsoft Excel from the bottom up or just looking to pick up a few tips and tricks, you've come to the right place. In this tutorial from everyone's favorite digital spreadsheet guru, ExcelIsFun, the 48th installment in his "Highline Excel Class" series of free video Excel lessons, you'll learn how to use the RATE, EFFECT, NOMINAL and NPER Excel functions to solve the following problems:
You can use the ingredients of items that are leftovers and not usually eaten. You can use a bunch of parsley stems, the insides of the onions, ends of mushrooms, a leftover piece of escarole, ends of potato, ends of carrots, pieces of celery and some parsnip. You can store these leftovers in a plastic bag and refrigerate it. However you have to use this in for days. Use a large pot and fill it with one third of this stuff. You can add all kinds of leftover pieces except Cruciferous vegetable...
Commercial hair conditioners aren’t just expensive, they’re loaded with chemicals. Why don’t you whip up something more natural at home?
-It is very important that you choose the right counter top. Although granite and marble may look good, they are not kind to the environment because they are mine deep out of the Earth.
This video is based on a chemistry experiment. This video is going to explain to us how to use gravimetric analysis in order to analyze sulfuric acid. This experiment should not be done for those who do not have a fundamental knowledge of chemical compounds, reactions and chemical safety. He explains first what he is about to do before he does it. Sulfuric acid is acidic and can be toxic if ingested or in contact with the eyes. Take extreme care with this experiment.
Cut out the core of the onion - where the root comes out. This is the section that has the most tear-inducing properties. Soak the onion in water before cutting - water will dilute the sulphuric compounds -or else, freeze the onion before cutting. The sulphuric compound that leads to tears will not react as quickly when it's cold. However, don't freeze it for too long because it can affect taste. 10 minutes should do it. Cut the onion in a well-ventilated room. Give the fumes a chance to esca...
Take steps today to keep your complexion wrinkle-free. You Will Need:
Exposed to hormones, pharmaceuticals, and other chemicals, the beautiful wild fish in Canada's Grand River have taken on some pretty odd characteristics—they're turning into females. A long-term study suggests using bacteria to manage polluted water could turn the tide for feminized fish.
It’s time for science. You are able to calculate the molar mass for a compound using the periodic table and the amount of compound involved. You might need to know this in your everyday life but you will definitely need this in a chemistry class.
Yolks may be your favorite part of an egg, but that doesn't mean they're healthy! If you're truly committed to eating better and living healthier, then watch this video to see why you should toss egg yolks out and how to live healthier.
Feeling like you need to rid your body of a few toxins? A nice, hot cup of tea isn't just soothing; some varieties have health and diet benefits. See which brew might be right for you. Learn how to tea-tox with help from this video.
We've worked hard to reduce the flow of toxic chemicals into our waterways, which means no more DDT and other bad actors to pollute or destroy wildlife and our health. But one observation has been plaguing scientists for decades: Why are large quantities of one toxic chemical still found in the world's oceans?
Transmitted by a sandfly one-third the size of a mosquito, parasitic Leishmania protozoa are responsible for a flesh-destroying disease that kills an estimated 20,000 people per year. Two new studies offer understanding of how the parasite provides immunity through persistence and why some people suffer more virulent forms of the disease.
Our quest to find new antibiotics has taken a turn — a turn down the road, that is. A team of scientists from the University of Oklahoma is scooping up roadkill and searching for bacteria on them that might yield the world's next antibiotic.
Ah, wine. The bouquet fills your nose. The rich finish fills your mouth with soft flavors of oak and raspberries. The wine warms your belly and soothes your mind. Yeast and their biochemical factory help create this feast for your senses. Thanks to a research group from France, we now have a little more information on how that process works and a little more appreciation for yeast's contribution.
A gold-medal winning entry into the iGEM synthetic biology competition could change the way we look at Esherichia coli, the bacteria better known as E. coli.
We've all been there: you're staring at a fantastic-looking salad or sandwich full of your favorite ingredients. You take a bite, and you taste only one thing—raw onion. A glass of water, a toothbrush, and an hour later, and your breath still tastes like only one thing—raw onion.
Organic fertilizer is based of natural occurring compounds instead of chemical based compounds. With healthy, natural soil, learn how your plants and the environment can thrive in this free gardening video series about how to use organic fertilizers on plants. The following clips illustrate:
Despite legends to the contrary, it appears that the saliva of a Komodo dragon is not teeming with pathogenic bacteria that kills their prey. Its reputation to survive while colonized with lots of horrible disease-causing bacteria, true or untrue, has made it the subject of research in pursuit of natural antimicrobial agents and led scientists to some remarkable findings.
Bacteria gets a bad rap. Most headlines focus on the danger and discomfort posed by pathogens like bacteria, but many of the bacteria that live on and in us are vital to our health. Many products out there, called probiotics, are sold with the implication that they're supporting these healthy bacteria that share our bodies — but do they actually work?
As researchers from Yale searched our environment for compounds to aid in the battle against drug-resistant bacteria, they got an unlikely assist from ticks.
On October 17, 1943, a story in the New York Herald Tribune read "Many laymen — husbands, wives, parents, brothers, sisters, friends — beg Dr. Keefer for penicillin," according to the American Chemical Society. Dr. Chester Keefer of Boston was responsible for rationing the new miracle drug, penicillin.
Scientists are constantly on the search for new organisms, species, and other types of life. A special group of these researchers, calling themselves "bioprospectors," dive deep into mines to find unique lifeforms with special properties not found anywhere else.
The best way to make sure you have the best connections on high voltage-lines is to clean them. Cleaning high-voltage wires with cleaning solvents is the best way to get the job done for a better flow of electricity. This video, produced by Polywater, trains electricians on the proper high-voltage cable cleaning procedures during splicing and termination. Methods are shown to remove different types of shields and compounds from insulation. The "Do's and Don'ts" of abrasion, solvent spraying, ...
Check out this video tutorial on how to streak an agar plate. What's an agar plate? Well, an agar plate is a sterile Petri dish that contains a growth medium (typically agar plus nutrients) used to culture microorganisms. Selective growth compounds may also be added to the media, such as antibiotics.
