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 naval " torpedo " were developed and deployed, most often by the Confederates, who faced a severe disadvantage in more traditional warfare methods.

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 experiments search for axions of astrophysical origin using the Primakoff effect.

Several objects?

Several ancient writers, such as Pliny the Elder and Scribonius Largus, attested to the numbing effect of electric shocks delivered by catfish and torpedo rays, and knew that such shocks could travel along conducting objects.

Several Biblical stories allude to the belief that the Canaanite gods all existed and possessed the most power in the lands that worshiped them or in their sacred objects ; their power was real and could be invoked by the people who patronised them.

Several components of the Surveyor 3 lander were collected and returned to the Earth for study of the long-term exposure effects of the harsh lunar environment on man-made objects and materials.

Several works of fiction explain pyrokinetic powers as being the ability to excite or speed up an object's atoms, increasing their thermal energy until they ignite, not necessarily objects, but also air particles.

Several objects made of bone and flint stone and also two human molars and incisors belonging to fossil Homo erectus have been found in Fontana Ranuccio.

Several games have been developed utilizing the idea of pins changing the route of balls or other objects:

Several sightings of probably mundane objects were cited, along with a sighting of a possible arc from a power line to a tree near Syracuse.

Since almost thirty European countries lay claim to fragments of the holy nails, Blom ( 2002 ) holds that " Constantine also understood the value of these objects in diplomacy "; Several were sent off to various dignitaries, one of whom was Princess Theodelinda.

Several groups are working on adding sensors and actuators of different sorts to common objects in the environment, to create " intelligent objects " that are aware of their surroundings, capable of predicting the user's goals and emotional state, and so can assist the user in a more effective way.

Several nebulae in the constellation Orion ( constellation ) | Orion commonly called deep-sky objects

Several optical surveys later identified 20 more candidate objects to the group.

Several times ( 1799, 1808, 1810 ) some of these objects were taken down and melted into liturgical objects.

Several objects were purchased by the Petersburg Academy of Sciences.

Several objects were found in and around the tomb of Djer:

Several royal collections of great historical importance are kept at the palace, including the Royal Armoury and weapons dating back to the 13th century, and the world's only complete Stradivarius string quintet, as well as collections of tapestry, porcelain, furniture, and other objects of great historical importance.

Several spells create objects on the board.

Several tribes used the seed for removing foreign objects from the eye, similar to the way that Clary sage seeds were used in Europe.

Several investigations of the, up to thick, artifact layers have found not only pottery and some bronze objects, but also organic material ( threads, bark, wood, leaves, seeds, etc.

Several used alternate versions tied to specific shows ' themes: for example, ringing telephones for The Office ; the ringing of cash registers for Deal or No Deal ; and objects striking metal for America's Toughest Jobs.

Several new map objects, including special quest towers that only allow passage if the hero meets certain criteria defined by the author of the map, also appear here for the first time.