Don’t Throw That Away!

By Angela Magnan

A former roommate once picked on me because I saved the crumbs from the bottom of cracker, chip, and pretzel bags. A few years later, he admitted he was rather impressed with all the different uses I found for them, from incorporating them into quiche crusts and coating fish, to topping casseroles and mixing them into meatballs. So it is not surprising that I am often astounded by the bags of trash that get brought to the curb after my neighbors host summer barbecues. I can’t help but wonder: how much of my neighbors’ food waste could be used for something else?

corn silkOne of the great pleasures of summer is fresh corn on the cob, and one of my least favorite things is the silk that often interferes with that pleasure. But these silky strands can be dried and used as a tea. Corn silk was used by Native Americans to treat urinary tract infections, malaria, and heart problems. It has been used in China, Turkey, and France as well to treat kidney stones, prostate disorders, bedwetting, and obesity. Studies on rats have shown some merit for its use as a diuretic agent, a blood sugar regulator, and an antidepressant. It also has high antioxidant activity. Traditionally, corn silk was collected prior to pollination, but research has shown that mature corn silk from fully developed ears actually has a higher level of antioxidant activity. 

onion skin teaOnion skins can also be used for tea. Simply add boiling water to onion skins and let it steep to a beautiful chestnut color. Onion skins contain quercetin, a compound found in many other fruits, vegetables, leaves, seeds, and grains, including apples, grapes, and black and green teas. Quercetin has shown anti-inflammatory and immune-boosting properties in studies on rats, but some research has shown that quercetin degrades without the presence of Vitamin C, meaning that both would need to be present to be beneficial. 

Although not as tasty and naturally sweet as the purchased corn silk tea I tried, I found the onion skin tea only slightly bitter with a smooth, pleasant earthy taste. It might taste even better, and be more effective, with a splash of OJ. 

wood trim stained with onion teaOr let it steep longer and use it as a fabric dye or wood stain. After steeping for 24 hours, I dipped one side of a spare piece of basswood trim in the onion skin tea and let it soak for more than an hour. It made a light honey-colored stain that is certainly less smelly and more eco-friendly than oil-based stains. Initially, I tried to wipe the stain onto the wood with a rag, and that didn’t work, so I would recommend this only on dippable small projects.

Do you have leftover lemon peels from making lemonade or lemon bars? Lemon peels are used for fragrance and deodorizing and have antimicrobial and insecticidal properties. Internet searches return results such as “50+ Ways to Use Lemon Peels.” Some of the recommendations include adding lemon peels to your bath; putting dried peels in mesh bags IMG_1934and placing the bags in a drawer or in your shoes to make them smell better; rubbing the peels on your skin when you run out of insect repellent or to eliminate garlic and onion odor; using them to polish your stainless steel sink or chrome faucets; starting a fire with the highly flammable dried peels; and rubbing the peel over your cutting board to sanitize it.

Although research validates that lemon peels do have antimicrobial properties, they seem to be more effective on some microbes than others. One research study found that lemon juice was very effective against Staphylococcus aureus, a bacterium that often causes food poisoning, but it was slightly less effective against Salmonella and even less so against E. coli. Another study using essential oils found lemon oil to have similar results. So, I am not sure I would trust a lemon peel to sanitize my cutting board, but I might be more inclined to add lemon to my water when attending my next barbecue. Just in case.

Sources:

Clax, J. “10 DIY wood stains that are homemade easily.” The Basic Woodworking: A Complete Guide. https://www.thebasicwoodworking.com/10-diy-wood-stains-that-are-homemade-easily/

Hasanudin K, Hashim P, Mustafa S. Corn silk (Stigma maydis) in healthcare: a phytochemical and pharmacological review. Molecules. 2012;17(8):9697-9715. Retrieved from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6268265/

Li Y, Yao J, Han C, et al. Quercetin, Inflammation and Immunity. Nutrients. 2016;8(3):167. Retrieved from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4808895/

Oikeh EI, Omoregie ES, Oviasogie FE, Oriakhi K. Phytochemical, antimicrobial, and antioxidant activities of different citrus juice concentrates. Food Sci Nutr. 2015;4(1):103-109. Retrieved from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4708628/

Ozogul Y , Kuley E, Uçar Y, and Ozogul F. Antimicrobial impacts of essential oils on food borne-pathogens. Rec Pat on Food, Nutr & Agr. 2015;7(1):53-61. Retrieved from: https://www.eurekaselect.com/132210/article

Vrijsen R, Everaert L, Boeyé A. Antiviral activity of flavones and potentiation by ascorbate. J Gen Virol. 1988;69:1749–51. Retrieved from: https://www.microbiologyresearch.org/docserver/fulltext/jgv/69/7/JV0690071749.pdf?expires=1597169419&id=id&accname=guest&checksum=3E98B31038B249A2FA74F0BDF07D4707

Medicinal Disclaimer: It is the policy of The Herb Society of America, Inc. not to advise or recommend herbs for medicinal or health use. This information is intended for educational purposes only and should not be considered as a recommendation or an endorsement of any particular medical or health treatment. Please consult a health care provider before pursuing any herbal treatments.

Photo credits: 1) Corn silk (FreeImages.com); 2) onion skin tea (author’s photo); 3) wood trim stained with onion tea (author’s photo); 4) lemon peel fire starter (author’s photo).


Angela Magnan grew up on a dairy farm in Vermont and has degrees in biochemistry, horticulture, and science writing. She now lives in Maryland and has worked in the Gardens Unit at the US National Arboretum since 2012.

Makrut Lime – Herb of the Month

By Maryann Readal

thai lime fruitThe Herb Society of America’s Herb of the Month for August is the makrut lime, Citrus hystrix, a member of the Rutaceae family. This lime is also known as kaffir lime or Thai lime, and also wild lime. You may have spotted it in a produce market or Asian supermarket and wondered what makes it different from an ordinary lime. It certainly looks different, in that it has a gnarly, bumpy skin. The very aromatic leaves are different, too, because they look as though they are two leaves attached to each other. The juice is sour and bitter, and so is not usually used in cooking because it can overwhelm other flavors.

This lime has been widely grown in Asia for so long that it has become naturalized in many countries. Therefore, no one is certain of its origin. It is a staple ingredient in Thai, Cambodian, Vietnamese, and other Southeast Asian cuisines. The leaves, which are sold frozen, fresh, or dried, are usually finely chopped and incorporated into food or sprinkled on top. The makrut lime can be planted outdoors in warmer climates, or grown in a pot that can be brought inside for the winter in colder climates. It is a host plant for the giant swallowtail butterfly.

thai limeRecently, there has been a concerted effort among chefs and other food professionals to replace the name kaffir lime with the name makrut lime or Thai lime. The word “kaffir” has a derogatory, racist connotation in South Africa, and it has a derogatory religious meaning in Middle Eastern countries. 

Like other citrus species, the leaves, seeds, skin, bark, and root of the makrut lime have a number of medicinal benefits. In Southeast Asian countries, it has been used in shampoos, ointments, and in toothpaste and mouthwash products. A recent study published in the journal Nutrition by Kooltheat et al. (2016) has shown that the essence of the lime used on the teeth and gums  can prevent tooth decay. In Malaysian countries, the leaf is rubbed into the gums and on the teeth as a mouth and dental cleaner. And because of the fruit’s limonene and citronella content, it is added to shampoos to treat lice. The lime has been used in Ayurvedic medicine to treat colds and congestion and to help with digestion. Its oil is also used in aromatherapy to reduce stress, anxiety, and fatigue. In Thailand, makrut lime is added to household cleaning products. The authors of an article in Drug Intervention Today conclude that because of the lime’s antioxidant, anti-inflammatory, and antimicrobial components, “extensive investigation on its pharmacology and clinical trials is needed to exploit their therapeutic utility to cure various diseases” (Abirami et al., 2014).

Distillers and bartenders have discovered that the addition of makrut lime to their beverages can make distinctive-tasting and aromatic drinks. Treaty Oak Distilling in waterlooDripping Springs, Texas, has developed a gin that incorporates the makrut lime, as well as other herbs. They describe their gin as making you “rethink everything you thought you knew about this spirit.”

Research on the medicinal qualities of the makrut lime underscores the importance of protecting native species that have been used for centuries as medicinal plants. It is promising that there is ongoing research on the effective medical applications of not only the makrut lime, but many other native medicinal plants as well.

For more information on the makrut lime, please visit The Herb Society of America’s website, where you will find more information, recipes and a beautiful screen saver of this unusual-looking fruit. https://www.herbsociety.org/hsa-learn/herb-of-the-month.html

Sources:

Kooltheat, N.  et al. Kaffir lime leaves extract inhibits biofilm formation by Streptococcus mutans. Nutrition. 32, (4). April 2016. Retrieved from https://www.sciencedirect.com/science/article/abs/pii/S0899900715004165?via%3Dihub#!

Abirami, A., Nagarani, G., & Siddhuraju, P.  The medicinal and nutritional role of underutilized citrus fruit-Citrus hystrix (Kaffir Lime): A Review.  Drug Intervention Today.  6(1), January, 2014. Retrieved from http://docplayer.net/38584426-The-medicinal-and-nutritional-role-of-underutilized-citrus-fruit-citrus-hystrix-kaffir-lime-a-review.html

Photo Credits (from top): Makrut lime fruits (Creative Commons); Makrut lime leaves (Wikimedia Commons, courtesy Forrest & Kim Starr), Waterloo Old Yaupon Gin (courtesy Treaty Oaks Distillery).

Medicinal Disclaimer: It is the policy of The Herb Society of America, Inc. not to advise or recommend herbs for medicinal or health use. This information is intended for educational purposes only and should not be considered as a recommendation or an endorsement of any particular medical or health treatment. Please consult a health care provider before pursuing any herbal treatments.


Maryann is the Secretary of The Herb Society of America. She is a Master Gardener and a member of the Texas Thyme Unit in Huntsville, TX. She gardens among the pines in the Piney Woods of East Texas.

Botanical Brews – An introductory guide to using tropical specialty ingredients in beer

By Amanda Dix

(Blogmasters’ note: Experiencing craft beer is a high point for many connoisseurs these days. While beer in its various forms has been around for millennia, today’s brew-masters have taken beer to a whole new level by adding unique flavor combinations to their recipes. Capitalizing on that trend, many gardens and arboreta are incorporating special tasting events into their program repertoire that highlight the herbs that make each brew unique. Below are some of horticulturist and brewer Amanda Dix’s suggestions for upping your botanical beer game. Even if you don’t brew yourself, these might inspire you to try new things and understand how herbs are woven into this timeless beverage.)

Many culinary dishes and beverages are abundant with tropical herbs, spices, and fruit. Beer is no exception, and using unique ingredients alongside barley, hops, and yeast is very common these days.

When formulating a beer recipe, be sure to take into account all of the ingredients collectively. There are so many types of malt, yeast, and hops out there. Focusing on how each ingredient will interact and complement each other is key to making a multi-layered, yet balanced brew.

First, start with the base beer and decide what flavors would interact well with the fruit, herb, or spice. Ask yourself:

What type of flavor does this malt give off? (biscuit, caramel, roasty, malty)

What kind of esters or phenols does this yeast make? (fruity, spicy, funky, none)

What flavors, aromas, and bitterness does this hop provide? (spicy, woody, fruity, floral)

Second, decide at what point in the brewing process this specialty ingredient will be most useful. One of the easiest ways to impart additional flavors in your beer is to add fruit, herbs, or spices during the secondary (post) fermentation process. They can be added to the boil, but their flavor and aroma will be more subtle. So, for the most punch, add some botanical blends during secondary fermentation. The sky’s the limit when it comes to the infusions you create, but here are a few ideas to get you started. CHEERS!

ginger-1960613_960_720Ginger (fresh, thinly sliced)

0.5-1 oz. per gallon in secondary fermentation (or 0.25-1 oz. per gallon in last 5 minutes of boil)

Beer style suggestions: American Wheat, Kolsch, Stout, Belgian, Sour/Wild Ale.

Roasted_coffee_beansCoffee (whole bean, crushed, or cold brewed)

4 oz. cold brewed per gallon in secondary fermentation OR 1-2 oz. whole bean or crushed per gallon in secondary fermentation.

Beer style suggestions: Stout, Porter, Cream Ale.

5474684018_9181629f19_bChocolate (cocoa nibs)

4-10 oz. per gallon in secondary fermentation.

Beer style suggestions: Stout, Porter, Brown Ale.

 

Citrus_fruits

Citrus (lemon, lime, orange, tangerine, mandarin, grapefruit, kumquat, etc.)

0.5-1.5 lbs. per gallon in secondary fermentation.

Beer style suggestions: Hefeweizen, American Wheat, Saison, IPA, Sour/Wild Ale.

hibiscus calyxHibiscus (dried calyx)

1-1.5 oz. per gallon in secondary fermentation (or make tea infusion).

Beer style suggestions: Wheat, Sour/Wild Ale, Bonde, Kolsch, IPA (or anything light colored to admire the red coloration and delicate flower aroma).

nutmeg-390318_1280Cardamom, Clove, Nutmeg, or Cinnamon

4-5 grams per 5 gallon batch in secondary fermentation.

Beer style suggestions: Wheat Ales, Saison, Stout/Porter (holiday beer), Pumpkin beer.

 

vanilla-vanilla-bars-spice-ingredients-royalty-free-thumbnail

Vanilla (whole bean sliced/scraped)

2-3 beans per 5 gallon batch – soak in vodka or bourbon for two weeks and add tincture to secondary fermentation.

Beer style suggestions: Stout, Porter, Belgian.

 


hibiscus for beerAmanda got her B.S. in Environmental Horticulture with an emphasis on floriculture crop production from the University of Minnesota, Twin Cities. She has always had a strong passion for anything involving the outdoors/nature and plants/animals. Her wide array of experience in the horticulture field at botanical gardens, arboreta, nurseries, and farms has led her to become the Assistant Conservatory Curator at Olbrich Botanical Gardens in Madison, WI. Amanda works in the tropical conservatory and oversees the production of the annuals that go out in Olbrich’s 16 acres of gardens. For the past 10 years, she has had a strong passion for craft beer and brewing, and hopes to one day become a Certified Cicerone.