Many methods are used in amateur astronomy, but most are variations of a few specific techniques.

Many related games have emerged from football, mainly with variations of contact to encourage greater participation.

Many chess openings and variations are named after Nimzowitsch, the most famous being the Nimzo-Indian Defence ( 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 ) and the less often played Nimzowitsch Defence ( 1. e4 Nc6 ).

Many rule variations of blackjack exist.

Many variations were created, the most common of which is served cold rather than hot.

Many others are possible, but they tend to be further variations and compounds of the above.

Many more errors came from the tendency of actors to interpolate words and sentences, producing so many corruptions and variations that a law was proposed by Lycurgus of Athens in 330 BC "... that the plays of Aeschylus, Sophocles and Euripides should be written down and preserved in a public office ; and that the town clerk should read the text over with the actors ; and that all performances which did not comply with this regulation should be illegal.

Many dishes that were once regional have proliferated in variations across the country.

Many variations are possible from the roughly classical-sized OO and Parlour to the large Dreadnought and Jumbo.

Many significant regional dishes have become national, but have proliferated in different variations across the country presently.

Many variations of the eye-fixation approach exist, including the induction used in the Stanford Hypnotic Susceptibility Scale ( SHSS ), the most widely used research tool in the field of hypnotism.

Many variations and alternatives to the original hypnotic induction techniques were subsequently developed.

Many stores include restaurants serving traditional Swedish food, including potatoes with Swedish meatballs, cream sauce and lingonberry jam, although there are variations.

Many regional dishes have become national, and dishes that were once regional have proliferated in different variations across the country.

Many of these lasers actually lase in several longitudinal modes at the same time, and beats between the slightly different optical frequencies of those oscillations will in fact produce amplitude variations on time scales shorter than the round-trip time ( the reciprocal of the frequency spacing between modes ), typically a few nanoseconds or less.

Many of his variations ( and he has become the de facto master of this musical genre ), including Le Streghe, The Carnival of Venice, and Nel cor più non mi sento, were composed, or at least first performed, before his European concert tour.

Many variations on seat allocation within party-list proportional representation exist.

Many industries use variations of these project stages.

Many other organisations developed variations on these, and for many years Windows and Macintosh computers used incompatible variations.

Many variations of this type exist, such as being canted forwards or backwards, and being carried on the dominant hand side, off-hand side, or the small of the back.

Many instruments originated during the Renaissance ; others were variations of, or improvements upon, instruments that had existed previously.

Many other languages use red panda, or variations of shining / gold or lesser / small in their names for this species.

Many possible candidates have been proposed, including specific copy number variations, NOTCH4, and histone protein loci.

Many types of soilless culture do not use the mineral nutrient solutions required for hydroponics.

Many sodium compounds are useful, such as sodium hydroxide ( lye ) for soapmaking, and sodium chloride for use as a deicing agent and a nutrient ( edible salt ).

Many wetland systems possess biofilters, hydrophytes, and organisms that in addition to nutrient up-take abilities have the capacity to remove toxic substances that have come from pesticides, industrial discharges, and mining activities.

Many plant fibers, for example, are indigestible to many herbivores leaving grazer community food webs more nutrient limited than detrital food webs where bacteria are able to access and release the nutrient and energy stores.

Many species grow in association with sphagnum moss, which absorbs much of the soil's nutrient supply and also acidifies the soil, making nutrients less available to plant life.

Many essential nutrients are toxic in large doses ( see hypervitaminosis or the nutrient pages themselves below ).

* Many types of bacteria immobilize pollutant minerals, but certain species of bacteria are crucial to nutrient conversion.

Many concealer moths feed on dead plant material and play a useful part in nutrient recycling.

Many tools are available to help vegetarians maintain an adequate nutrient balance including several Vegetarian Diet Pyramids.

Many species of plants have mycorrhizae to assist with nutrient uptake in infertile conditions.

Many everyday foods and pharmaceuticals are derived from nutrient premixes.

Many different soil microorganisms are responsible for nutrient recycling ( for one, through decomposing plant residues ) and other soil building and maintaining activities.

Many of these solutions aim to control the Volatile Sulfur Compound ( VSC )- creating anaerobic bacteria that live in the mouth and excrete substances that lead to bad breath and unpleasant mouth taste.

Many chemical properties of astatine have been determined using tracer studies on extremely dilute astatine solutions.

Many solutions were proposed for how to determine longitude at the end of an exploratory sea voyage and hence the longitude of the place that was visited ( in case one would want to revisit it, place it on a map, or more urgently, avoid known marine hazards ).

Many pairs of liquids are present in which there is no uniformity of attractive forces i. e. the adhesive and cohesive forces of attraction are not uniform between the two liquids, so that they show deviation from the Raoult's law which is applied only to ideal solutions.

Many exactly solvable models have soliton solutions, including the Korteweg – de Vries equation, the nonlinear Schrödinger equation, the coupled nonlinear Schrödinger equation, and the sine-Gordon equation.

Many state LIHEAP ( Low Income Home Energy Assistance ) programs work side by side with WAP to provide both immediate and long term solutions to energy poverty.

Many dentists include application of topical fluoride solutions as part of routine cleanings.

Many consumer VoIP solutions do not support encryption, although having a secure phone is much easier to implement with VoIP than traditional phone lines.

Many salt solutions and molten polymers are non-Newtonian fluids, as are many commonly found substances such as ketchup, custard, toothpaste, starch suspensions, paint, blood, and shampoo.

Many self-given enemas used at home are the pre-packaged, disposable, sodium phosphate solutions in single-use bottles sold under a variety of brand names, or in generic formats.

Many of these solutions have been established according to FCC, CRTC, and NENA i2 standards, in order to help enterprises and service providers reduce liability concerns and meet E911 regulations.

Many solutions for the developing world are sold as a single package, containing a ( micro ) electricity generation power plant and energy storage.

Many photographic solutions have high chemical and biological oxygen demand ( COD and BOD ).

Many partially educated, unemployed Tamil youth fell for revolutionary solutions to their problems.

Many solutions to counteract the more negative findings have been proposed.

Many of the puzzle solutions are inspired by various tales ( so a player with knowledge of the stories beforehand would have an advantage ).

Many conservation organizations have come together to address the bushmeat crisis through the formation of the Bushmeat Crisis Task Force, whose mission is to build a public, professional and government constituency aimed at identifying and supporting solutions that effectively respond to the bushmeat crisis in Africa and around the world.

Many liquids and aqueous solutions are highly transparent.

Many of these solutions, even in the early 1970s were developed in-house by pioneers in the field to meet their own requirements.

Many possible solutions are available.

Many other solutions also exist, and particle systems are frequently written from scratch if non-standard effects or behaviors are desired.

Many interesting special functions arise as solutions of linear second order ordinary differential equations.