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In 1901, Edgar Wedekind published the synthesis of alkyl ketene dimers by the reaction of carboxylic acid chlorides with tertiary amines: [5] [6] RCH 2 COCl + R 3 N → RCH=C=O + R 3 NHCl The molecular weight determined by the early researchers indicated (CH 3) 2 CH=C=O) n where n > 1 for the dehydrohalogenation of isobutyryl chloride with triethylamine.
This is an accepted version of this page This is the latest accepted revision, reviewed on 18 January 2025. This is a list of cannabis seed companies. Some of these supply only hempseed, that is, cultivars that produce low levels of THC (allowable levels are determined by local regulation). BSF Seeds Coopérative Centrale Des Producteurs De Semences De Chanvre, France, is the main supplier of ...
Critics of drug prohibition point to laws against marijuana as a cause for the popularity of synthetic products, and argue that cannabis legalization reduces demand for substitutes. [ 56 ] [ 57 ] [ 58 ] The drug is most commonly used in populations that cannot easily acquire or consume marijuana, such as teenagers, inmates, [ 59 ] [ 60 ] people ...
Herbies Seeds - Best Seed Bank for Free Cannabis Seeds. Pros. 3,000+ weed strains. Free cannabis seeds with every order. Free grinder on orders over $60. 10% discount on Bitcoin payments.
AK-47 cannabis was developed in the Netherlands by Serious Seeds in 1992, [3] [5] [7] [8] [9] but may have been bred as early as the 1970s, [10] and is said to exemplify the good quality cannabis strains from the 1990s. [5]
AAK AB, formerly AarhusKarlshamn, is a global Sweden-based company and producer of vegetable oils and fats. [2] History. The company, formerly known as ...
Ramtil oil – pressed from the seeds of the one of several species of genus Guizotia abyssinica (Niger pea) in India and Ethiopia. Used for both cooking and lighting. Ras-el hanout – Raspberry (leaves) – Red 2G – color; Refined microcrystalline wax – glazing agent; Rhodoxanthin – color; Riboflavin (vitamin B 2) – color (yellow and ...
Autoflowering cannabis or day neutral cannabis varieties automatically switch from vegetative growth to the flowering stage based on age, as opposed to the ratio of light to dark hours required with photoperiod dependent/short-day strains. Many autoflowering varieties are ready to harvest in less than 10 weeks from seed.