In one sentence, describe what the following article is about: Pour the solution in a pot and place it over an outdoor stove. Turn the stove to medium heat and let the solution boil for 20-30 minutes, or until a ring of crystals begins to form around the outside. Keep the gas mask on while boiling the solution, as it will still release toxic ammonium gas. Do not reuse the pot for cooking after preparing ammonium nitrate with it. Pour the boiled solution into a measuring bowl and place it on a flat surface at least 100 feet (30m) away from any homes or buildings. Let the ammonium nitrate evaporate for up to 2 weeks, or until all that's left in the measuring bowl is white crystals. Always wear a gas mask while handling liquified ammonium nitrate, and keep other people or animals (especially children and pets) away from the solution while it evaporates. After the ammonium nitrate has evaporated into solid crystals, it will stop releasing ammonium gas. To make sure you have purified potassium nitrate crystals, mix a small sample of them with an equal amount of granulated sugar. Set the mixture on fire in a controlled area, like a laboratory, using a lighter. If you've created pure potassium nitrate, it should produce purplish flames. Handle the potassium nitrate and lighter with care and in a controlled area to prevent injuries.
Summary: Boil the solution over a stove outdoors. Leave the ammonium nitrate outdoors to evaporate for 1-2 weeks. Test the potassium nitrate for reactivity.

In one sentence, describe what the following article is about: You'll need a vacuum pack machine. You'll also need a glass jar sealing attachment for your vacuum sealer. This is a special type of device that fits over glass jars, like mason jars, and allows you to vacuum seal your jars. It's a good idea to sterilize any jars you're using as a precaution. You can boil them or run them through a very hot dishwasher. If you're boiling them, put them in a pot with water that completely covers the jars. Bring the pot to a boil. Reduce heat to a simmer and let them stay there until you're ready to use them. While waiting for the jars to sterilize, prepare the food you're going to can. This may mean following a recipe for a jam or a jelly. However, many people store easily breakable items that cannot be stored in bags in vacuum-sealed jars. For example, you may want to store something like small candies or nuts in a vacuum-sealed jar. When you're done preparing the food, you can remove the jars from the boiling water. Use either tongs or a jar lifters. Allow them to dry and then add the food. Once again, leave some airspace. With soft spreads, like jams or jellies, leave 1/4 an inch of airspace. Whole foods, like nuts or candies, need 1/2 an inch of airspace. Use a non-metallic spoon to remove bubbles. Do so by running the wooden or rubber spoon around the inner surface of the jar, pressing the food down gently. Once your food is prepared, you can begin to prepare the vacuum. Place the lid on the jar you're going to seal. However, leave the lid ring off for now. Attach the hose of the vacuum pack sealer to the jar sealer attachment. From there, place the attachment over the jar. Make sure the attachment is on firm so it does not fall of when you begin vacuuming the jar. You should process the jar according to your specific device instructions. However, in most cases you simply turn the device on until the machine indicates the jar is sealed. You should hear the lid pop when it is ready. The machine may also indicate, through a sign like a green light, that the process is complete. Remove the hose from the sealing attachment. Remove the sealing attachment from the jar. Then screw the ring tightly onto the jar. Store the jar in a cool, dry place.
Summary: Acquire the necessary items. Sterilize your jars before you seal them. Fill the jars. Prepare the vacuum. Turn the vacuum sealer on. Screw the ring onto the jar.

In one sentence, describe what the following article is about: Remember that celebrities are people, too. They will have times when they are busy, frustrated, or otherwise dealing with a major situation where it might not be appropriate to approach them. If you see a celebrity who seems like they're in a big rush, or if they are dealing with a critical situation, leave them to their business. Some situations, such as escorting someone into an ambulance, will be obvious. Others, like if they are in a rush while getting coffee, will be less conspicuous. Use your best judgement and respect their time and space to the best of your abilities. Try to make eye contact and smile at them. Not only does this help give you confidence, it gives them a chance to acknowledge you. If they don't acknowledge you, they may be too busy. " Try to stay composed. Don't panic or start screaming if they wave or smile back. Simply casually walk up to them and introduce yourself. Say hi, and let them know that you're a fan of their work. You could say something like, "Mr. Johnson! I can't believe I'm meeting you in person. I've been a fan of yours for a long time." If you know they have just had a widely publicized life event, such as getting married or welcoming a new child, you can say something like, "Congratulations on your marriage!" Stick to widely publicized events. Do not drop personal or private information that you learned online or through gossip magazines. If the celebrity's body of work has had a major impact on your life, don't be afraid to let them know. Otherwise, try to make a personal connection by talking about things you would talk about to any other person. Ask them about their work, and let them know why you're a fan of them. Try something like, "Your second album was really important to me when I was applying to college. It helped get me through some very stressful moments." Remember to keep the conversation brief. Let them know that their work helped you through a hard time, but don't give them a long story about your life unless they specifically ask for it. Keep things short and sweet. End the conversation with something like, "I know you're busy and I don't want to keep you. Thank you for taking a few minutes to talk to me!" Celebrities know that things like autographs and taking pictures with fans are part of the deal. Don't be afraid to ask for a quick autograph or picture if you want one. Just make sure to keep it quick, and always ask their permission before you take their picture. Don't get mad if they won't give your their autograph. If they refuse, say "That's okay. I still enjoyed meeting you. Have a nice day." A graceful ending is always best. Some celebrities may take a picture or sign an autograph, but may ask you not to do something like post the picture on a certain social media site or to not get their autograph tattooed on you. Respect their wishes in these cases.
Summary:
Determine if this is the right time to approach them. Casually approach them and say "Hi. Make a personal connection. Ask for an autograph or a picture if you want one.