Chemists love to tinker with cyclodextrins (CDs)—macrocyclic daisy chains of glucose molecules that feature a hydrophobic core surrounded by a hydrophilic exterior. They’ve been used to encapsulate drugs, in air fresheners to sop up smelly molecules, and in water purification systems to capture and destroy micropollutants. Structure of alpha-L-cyclodextrin Now, more than 130 years after their discovery, CDs are finally getting a glimpse of their mirror image. For the first time, chemists have synthesized L-CDs using the unnatural sugar L-glucose.
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Quinaldine Fish Anesthetic for Shipping Quinaldine Quinaldine is a yellowish, oily liquid with limited water solubility that must be dissolved in acetone or alcohol before it is mixed with water. While it is an effective anesthetic, it is an irritant to fish, has an unpleasant odor, and is a carcinogen. The low cost of quinaldine has made it a popular tool for collecting tropical fish for the aquarium trade, as well as in the bait and sport fish industries. Quinaldine sulfonate is a pale yellow, water-soluble powder; it is more costly than quinaldine or MS-222.
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What to know about plant growth regulators Is this the year you should try PGRs in your crop management program? EARLY-SEASON DEVELOPMENT: Crop scouting and digging indicate these seedlings are off to a strong start. Jon Zuk with WinField United believes the right PGR products help ensure that result. WINFIELD UNITED Would you try a product if you’d never heard of that category of compounds? Odds are you would say, “No thanks.” But what if your input supplier suggested a product with a proven track record for increasing yields? The term “PGR” may mean nothing to you. On the other hand, a 3-bushel-per-acre corn yield increase over time in reputable plots might be worth investigating.
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