Hops, Humulus

Pillay, M. and Kenny, S. T. 1996. Structure and inheritance of ribosomal DNA variants in cultivated and wild hop Humulus lupulus L. Theor. Appl. Gen. 93 333-340. 

Zhao F, Watanabe Y, Nozawa H, Daikonnya A, Kondo K and Kitanaka S. 2005. Prenylflavonoids and phloroglucinol derivatives from hops (Humulus lupulus). J Nat Prod 68(l) 43-49. 

Hops (Humulus lupus). Reprinted from Culbreth DMR. (1927). Materia Medica and Pharmacognosy, 7th ed. Philadelphia Lea. Febiger. 

Minnesota, Iowa, and Illinois (9). As indicated by its common name, the hop-vine borer had been found in close association with hop (Humulus lupulus) plants. Wild hops, found from the east coast of the U.S. to the Rocky Mountains, presumably served as the primary host for the Insect in North America (10) for the last 100-150 years or longer. 

Yilmazer, M., Stevens, J.F., Deinzer, M.L., and Buhler, D.R., In vitro biotransformation of xanthohumol, a flavonoid from hops (Humulus lupulus), by rat liver microsomes, Drug Metab. Dispos., 29, 223, 2001. 

Milligan, S.R. et al.. Identification of a potent phytoestrogen in hops (Humulus lupulus L.) and beer, J. Clin. Endocrinol. Metabol, 84, 2249, 1999. 

Other uncommon natural derivatives are 2-acylcyclohexane-l,3-diones or p-triketones, typical of hops (Humulus lupulus, Cannabinaceae). The (3-acids from hop belong to this class of chemicals and are by-products of hop processing for brewing. The fraction containing these products has been examined in a choice bioassay for its effect on the feeding behavior... 

ACJ Hermans-Lokkerbol, R Verpoorte. Preparative separation and isolation of three bitter a-bitter acids from hop, Humulus lupulus L., by centrifugal partition chromatography. J Chromatogr A 664 45-53, 1994. 

PS Hughes. Preparative regime for the purification of bitter acids derived from hops (Humulus lupulus L.). J Chromatogr A 731 327-330, 1996. 

Hop flavonoids were also quantitatively characterized by HPLC-MS (149). Xanthohumol was the principal flavonoid and was accompanied by minor amounts of eight other flavonoids from nine hop (Humulus lupulus) varieties. Further applications of chromatographic separations on phenolic compounds in beers, spirits, and raw materials can be found from the previous work by McMurrough and Byrne (24). 

Monoterpenoids are responsible for fragrances and flavors of many plants and thus their products are used in perfumery and as spices. To date over 1,500 monoterpenoids are known, and these constitute acyclic, monocyclic, and bicyclic monoterpenoids (32), which occur in nature as hydrocarbons, alcohols, aldehydes, and carboxylic acids and their esters. Several acyclic monoterpenoid hydrocarbons are known, and these include trienes such as 3-myrcene (Cl), a-myrcene (C2), (Z)-a-ocimene (C3), ( )-a-ocimene (C4), (Z)-3-ocimene (C5), and ( )-P-ocimene (C6). 3-Myrcene and 3-ocimene are constituents of basil (Oci-mum basilicum, Labiatae) and bay (Pimenta acris, Myrtaceae), pettitgrain (Citrus vulgaris, Rutaceae) leaves, strobiles of hops (Humulus lupulus, Cannabaceae), and several other essential oils. Unsaturated acyclic monoterpene alcohol constituents of plants and their derived aldehydes play a signihcant role in the perfume industry. Some common acyclic monoterpene alcohols and aldehydes include geraniol (C7), linalool (C8) (a... 

Wang Q, Ding ZH, Liu JK, Zheng YT. Xanthohumol, a novel anti-HIV-1 agent purified from Hops Humulus lupulus Antiviral Res 2004 64(3) 189-94. 

Spiewak R, Dutkiewicz J. Occupational airborne and hand dermatitis to hop Humulus lupulus) with non-occupational relapses. Ann Agric Environ Med 2002 9(2) 249-52. 

Estrada JL, Gozalo F, Cecchini C, Casquete E. Contact urticaria from hops Humulus lupulus) in a patient with previous urticaria-angioedema from peanut, chestnut and banana Contact Dermatitis 2002 46(2) 127. 

Henderson MC, Miranda CL, Stevens JF, Deinzer ML, Buhler DR. In vitro inhibition of human P450 enzymes by prenylated flavonoids from hops, Humulus lupulus. Xenobiotica 2000 30(3) 235-51. 

Hop Humulus lupulus Squirting cucumber Ecballium elaterium... 

Fig. 179.—Hop (Humulus lupulus). A, portion of plant showing pistillate inflorescences B, staminate inflorescence C, rachis of pistillate inflorescence ( hop O. Robbins.)...

Hops Humulus lupulus Aof A CT Y Relaxant in psychic work. 

The use of dimethylaminocinnamaldehyde (DMACA) as a reagent for the colorimetric determination of flavanols was first described by Thies and Fischer [146]. The first protocol was developed by Me Murrough and Me Dowell [147] for purified extracts of barley and hops (Humulus lupulus). The reaction scheme is the same as for the vanillin reaction. The reactivity of proanthocyanidins essentially again resides in the 5,7-hydroxylation of the aromatic A-ring, a single bond between C2 and C3 and the lack of a... 

Humuli iupuli strobulus Hops Humulus lupulus L. Moraceae (Cannabaceae) DAB 10, BHP 83 Acyl phlorogluddes humulone ( a-adds, 3%-12%) Lupulone ( (3-acids,, 3%-5%) unstable compoutids, hop bitter acids... 

Hops (Humulus lupulus L.) belong to the mulberry family (Moraceae). The leaf and flower cone with luplin (yellow secreted particles) are used to flavor beer, and to alleviate thirst as a nutraceutical. Air-dried hops contain a-acids in 2-12% yields [102]. The a-acids are found in a lead-acetate-precipitate derived from the methanol extract of hop. The chemical structures are shown in Fig. 14a [103,104]. Humulone is the most easily obtainable a-acid by repeated crystallization. Isomerization of the a-acids is the most important reaction in beer brewing, and is easily induced by boiling. Beer contains 20-25 mg/L of iso-a-acids, which mainly contribute to its bitterness. 

Hops powder 150 mg hops alpha acids (from hops [humulus lupulus, ieaves, flowers] extract) 10 iU naturai Vitamin E (from 8 mg d-aipha tocopheroi acetate) 0.5 mg astaxanthin (from Haematococcus pluvialis algai extract) 1.8 mg rosmarinic acid (from rosemary [Rosemarinus officinalis, ieaves, flowers] extract) <50% maltodextrin, 10% caicium silicate 6% vegetable stearine... 

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