Several kinds of descriptive categorizations can be applied broadly to the elements, including consideration of their general physical and chemical properties, their states of matter under familiar conditions, their melting and boiling points, their densities, their crystal structures as solids, and their origins.

Several other medical conditions can resemble RA, and usually need to be distinguished from it at the time of diagnosis:

Several species are adapted to extreme conditions imposed by elevation and latitude ( e. g. Siberian Dwarf Pine, Mountain Pine, Whitebark Pine and the bristlecone pines ).

Several GABA analogs are prescribed off-label for a variety of other conditions ( such as pregabalin being used to treat the symptoms of fibromyalgia under the brand name Lyrica ); gabapentin itself has been shown to be as effective as estrogen at reducing hot flashes.

Several conditions can cause facial paralysis, e. g., brain tumor, stroke, and Lyme disease.

Several large groups, labyrinthodont amphibians were particularly devastated, while the first reptiles fared better, being ecologically adapted to the drier conditions that followed.

Several national and world gliding records have been achieved from Omarama, and the prevailing conditions have attracted record seekers such as Steve Fossett.

Several conditions can result in this form of shock.

Several of the 14 species that comprise this group have developed special strategies to cope with the alternately drier conditions.

Several medical conditions can result in a natural sex change in humans, where the appearance at birth is somewhat, mostly, or completely of one sex, but changes over the course of a lifetime to being somewhat, mostly or completely of the other sex.

Several animal species have adapted to the conditions of life on the Brocken.

Several 17th and early 18th century pirate ships sank within Kingston Harbour and are being carefully harvested under controlled conditions by different teams of archaeologists.

Several neurological conditions such as Alzheimer's disease, various types of brain injury, Klüver-Bucy syndrome, Kleine-Levin syndrome, and many more neuro-degenerative diseases can cause hypersexual behavior.

Several magnificent sandstone structures, built by convicts working under hard labour conditions, were cleaned of ivy overgrowth and restored to a condition similar to their appearance in the 19th century.

Several substances that exist as gases at standard conditions of temperature and pressure are commonly used as concentrated aqueous solutions.

Several conditions are needed to produce foam: there must be mechanical work, surface active components ( surfactants ) that reduce the surface tension, and the formation of foam faster than its breakdown.

Several drugs acting on the orexin system are under development, either orexin agonists for the treatment of conditions such as narcolepsy, or orexin antagonists for insomnia.

Several member countries, including Austria, Switzerland, Norway, Ireland, and New Zealand, expressed reservations about the lack of conditions in the proposed exemption.

Several divisions of non-conscripted recruits were in training in emergency camps at home, some of them in very poor sanitary conditions.

Several commentators imagine that his many hardships contributed to these conditions.

" Several factors contributed to the OUN-B's increase in popularity and, ultimately, monopoly of power within Ukrainian society, conditions necessary for the massacres to occur.

Several studies have manipulated the presentation features of feedback information ( e. g., frequency, delay, interpolated activities, and precision ) in order to determine the optimal conditions for learning.

Several configurations are in general use, depending on the conditions.

Several conditions make it hard for researchers to obtain accurate statistics on elder abuse.

Several vapour-vesicles may unite while the rock is still viscous, and thus form a large cavity which may become the home of an agate of exceptional size ; thus a Brazilian geode lined with amethyst and weighing 35 tons was exhibited at the Düsseldorf Exhibition of 1902.

Several elementary functions which are defined via power series may be defined in any unital Banach algebra ; examples include the exponential function and the trigonometric functions, and more generally any entire function.

Several years may be noted if the work has gone through substantial revisions.

Several major areas may be distinguished within computational chemistry:

Several other sports may have taken place here, such as lawn bowls, croquet and possibly a version of the Aztec game called ' tlachtli ' ( scoring a ball through a hoop using your hips ).

Several theories on the origins of the term " Damascus steel " exist, but none of them may be confirmed definitively.

Several months passed and pleas to Allan were ignored ; Allan may not have written to Poe even to make him aware of his foster mother's illness.

Several of these methods may be directly extended to give definitions of e < sup > z </ sup > for complex values of z simply by substituting z in place of x and using the complex algebraic operations.

Several methods of calculation have been proposed, and although there may be small differences in the numerical values of the electronegativity, all methods show the same periodic trends between elements.

* Several models of participation are possible: firstly, a model in which the employees form part of the supervisory board or of the administrative board, as the case may be ; secondly, a model in which the employees are represented by a separate body ; and finally, other models to be agreed between the management or administrative boards of the founder companies and the employees or their representatives in those companies, the level of information and consultation being the same as in the case of the second model.

Several commentators have suggested that Congress alone may decide for itself what constitutes a " high crime or misdemeanor ".

Several cases have ruled that persons found not guilty by reason of insanity may not withdraw the defense in a habeas petition to pursue an alternative.

Several modern religious movements, for example the organizations within the New Thought Movement and the Unity Church, may be said to have a particularly idealist orientation.

Several plants are now in operation in zones where Richter Scale readings may reach eleven.

Several kicks may be called a scissor kick, involving swinging out the legs to kick multiple targets or using the legs to take down an opponent.

Several years earlier, DOB founders Del Martin and Phyllis Lyon similarly relegated sexual acts as unnecessary in determining what a lesbian is, by providing their definition: " a woman whose primary erotic, psychological, emotional and social interest is in a member of her own sex, even though that interest may not be overtly expressed ".

Several cyanobacterial strains are also capable of diazotrophic growth, an ability which may have been present in their last common ancestor in the Archaean.

Several cell types may be present in the epidermis.

Several racks can be administered by a single processor, and may have thousands of inputs and outputs.

Several ribosomes may be attached to a single mRNA at any time.

Several factors may have contributed to the " death " of New Wave science fiction.

Several fundamental common law institutions may have been adapted from similar legal institutions in Islamic law and jurisprudence, and introduced to England after the Norman conquest of England by the Normans, who conquered and inherited the Islamic legal administration of the Emirate of Sicily, and also by Crusaders during the Crusades.

Several potential methods of altering the climate of Mars may fall within humanity's technological capabilities, but at present the economic resources required to do so are far beyond that which any government or society is willing to allocate to the purpose.

Several games have also featured modes that involve teams of characters ; players form " tag teams " to fight matches in which combat is one-on-one, but a character may leave the arena to be replaced by a team mate.