Forensics Source 902 NarcoPouch Marquis Reagent Marquis Reagent, Box of 10 Individual NarcoPouchÂ® Tests. For General Screening.Forensics Source 902 NarcoPouch Marquis Reagent Features:; Up to three chemical ampoules per pouch provides greater substance discrimination; White background on each pouch makes identifying color changes easier and more accurate; Color results for target substance is printed on the front of each pouch; Safety holder helps to prevent broken glass from puncturing the pouch during normal use
Dry potato dextrose agar mix. Frequently used in the expansion and isolation of mushroom mycelium. 114 grams (1/4 lbs) per container. 20 grams per 500 ml of water to fill (20) 100 X 15 petri dishes. Heat water to a simmer and add potato dextrose agar mix. Simmer and stir slowly until fully dissolved. Sterilize at 10 psi for 30 minutes and pour.
Fundamental Rockhound Products: 2 lb Size Large Ceramic Media Rock Tumbling Media for Filler, Cushioning, Protecting
Manufacturer: Sister's Rocks LLC
Brand: Fundamental Rockhound
Ceramic Media is the newest and best addition to tumbling media in decades. .... .... It is used for cushioning and filling. The best tumbles are when you keep your levels at exactly 3/4 full with a tight grind. Unless you have all sizes of rock to keep adding to your tumble, it's almost impossible to achieve a consistently tight grind. Adding ceramic media will help you accomplish both of these tasks. .... .... .... This is size large. .... ..... .... We also offer mixed size ceramic media. .... .... .... Ceramic media will eventually grind away, just like your rocks will, but it will take some time. These are reusable for quite a while. Yes, they are more expensive than plastic pellets (also used for cushioning stones), but you can use the same ceramic media in all stages, where plastic pellets have to be separated - once used in coarse grit they can only be reused in coarse and so on for all stages. .... .... .... Some people use ceramic media in all stages. Some use in medium, fine, and polish. Other people use in polish only. NOTE: Brand new ceramic media can have sharp edges. If using brand new media in the polish stage you must run in water for 24 hours to make sure they are smooth, or you'll scratch your stones. I have lots of rock, so when I run my coarse stages, I just keep checking every few days and add more rock to keep the levels up. I add both small and large stones, but first I feel the stones that have been running and any that feel perfect I remove, clean, and set aside for the next stage. Once I have a barrel of perfect stones, that's when I start conditioning those stones to accept polish, which is step 2, your medium grit, then fine, then prepoish, and finally the final polish. I use ceramic media as filler as needed through stage 2 to final polish. Ceramic media is a must if you are polishing obsidian or apache tears, and use it in all stages, even coarse.