Several competing models, although correctly dealing with the conformation of each individual peptide chain, gave way to the triple-helical " Madras " model, which provided an essentially correct model of the molecule's quaternary structure although this model still required some refinement .< ref > The packing structure of collagen has not been defined to the same degree outside of the fibrillar collagen types, although it has been long known to be hexagonal or quasi-hexagonal.

Several types of military bridging vehicles have existed through the years.

Several types of chocolate can be distinguished.

Figure 8: Several types of diodes.

Several laboratory scale techniques for distillation exist ( see also distillation types ).

Several thousand patients have been treated with various types of tumours.

Several types of brain lesions can occur in individuals with TSC and 60 %-90 % of people with TSC develop epilepsy.

Several grappling styles like Judo, Shoot wrestling, Catch wrestling, Brazilian jiu-jitsu, Sambo and several types of wrestling including Freestyle and Greco-Roman have gained global popularity.

Several types are existent in Qing dynasty and used in dishes of stewing hams ( 火腿炖肘子 ), and vegetables, or for a wide variety of soup and important soup stocks.

Several types of FDA approved vacuum therapy devices are available with a doctor's prescription.

Several types of wild greens, known collectively as chwinamul ( such as Aster scaber ), are a popular dish, and other wild vegetables such as bracken fern shoots ( gosari ) or Korean bellflower root ( doraji ) are also harvested and eaten in season.

Several different types of light sources exist, each having different properties that affect their appropriateness for certain tasks, particularly efficiency and spectral power distribution.

Several types of molecules are particularly important during morphogenesis.

Several types of cell adhesion molecules are known and one major class of these molecules are cadherins.

Several types of " mania " such as kleptomania and pyromania are related more closely to obsessive-compulsive disorder than to bipolar disorder, depending on the severity of these disorders.

Several types of plasmid addiction systems ( toxin / antitoxin, metabolism-based, ORT systems ) were described in the literature and used in biotechnical ( fermentation ) or biomedical ( vaccine therapy ) applications.

Several cell types may be present in the epidermis.

Several types of RNA can downregulate gene expression by being complementary to a part of an mRNA or a gene's DNA.

Several types of visual prosthesis are in development or trials in humans, and one device has been approved for sale in the European market.

Several types of random samples are simple random samples, systematic samples, stratified random samples, and cluster random samples.

Several types of mushroom ( het ) also feature in Thai cuisine such as straw mushrooms ( het fang ) and white jelly fungus ( het hu nu khao ).

Several types of fish can detect ultrasound.

Several types of pumps may be used in sequence or in parallel.

Several types have technological importance, for example, in liquid crystal displays.

Several days after the German surrender, U-boat ace Wolfgang Luth was shot and killed by a sentry while walking after dark at the German naval base at Flensburg-Marwik.

Several naval officers served as volunteer chairs of the Museum until 1959 when Niels Jannasch was hired as the Museum's founding director, serving until 1985.

Several flying boat aircraft and other equipment had also been donated to Canada by the Americans who had temporarily established naval air stations on the east coast pending formation of the Royal Canadian Naval Air Service.

Several of the U. S. ships detected the Japanese ships on radar, beginning about 01: 24, but had trouble communicating the information to Callaghan because of inexperience operating as a cohesive naval unit, or problems with their radio equipment and a further lack of discipline regarding their communications procedures.

Several naval battles have been fought near Ushant between the British and French navies.

Several members dissented from its inclusion on the ground that it is in common use throughout the country ; and a naval officer who was present said that it has for years been a popular expression in the service for a tool or implement, the exact name of which is unknown or has for the moment been forgotten.

Several other Commonwealth navies also use naval ensigns with a visual connection to the White Ensign.

Several Canadian naval ships have been named HMCS Athabaskan.

Several naval battles have been fought nearby, including the Battle of Goodwin Sands in 1652 and the Battle of Dover Strait in 1917.

Several important military ventures were also named for him, including the Jagdgeschwader 26 Schlageter fighter-wing of the Luftwaffe, and the naval vessel Albert Leo Schlageter.

Several naval engagements that occurred somewhere in the vicinity of Dover, England, are known as the Battle of Dover:

Several cautious probing attacks by the German naval infantry, Danzig SS and police and Wehrmacht were again repulsed by the Poles ; at 0300, during one of these attacks, they sent a burning train against the land bridge, but this failed when the terrified driver decoupled too early.

Several Canadian naval units have been named HMCS Chicoutimi.

Several Canadian naval units have been named HMCS Halifax.

Several Canadian naval units have been named HMCS Vancouver after the city.

Several other naval battles are recorded and in 882 Alfred himself fought against four ships, capturing two.,

Several Canadian naval units have been named HMCS Nootka.

Several catamarans built by Incat have entered naval services, including, best known for its contribution to the INTERFET in East Timor, and HSV-1 Joint Venture and HSV-2 Swift, both having been in service with the US military.

Several similar issues are known, illustrating the importance of naval power during that period of Rome's history.

Several French naval officers who knew Rivière well were able to confirm that the body was indeed his.

Several naval officers spent some time as a Sea Fencible.

Britain provided 12, 000 troops of which a large part were Indian troops, made out of units of Baluchis, Sikhs, Gurkhas, Rajputs, and Punjabis .. Several of Britain's Australian colonies also sent contingents of naval and army personnel.

Several Canadian naval units have been named HMCS Calgary.

Several Canadian naval units have been named HMCS Charlottetown after the provincial capital of Prince Edward Island.