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 groups of characters serve as Felix's antagonists in The Lost Age.

Several of the feuds were comedy-oriented, with the Bushwackers ' antagonists expressing disdain for their wild and wacky ways.

Several of the other atypical antipsychotics such as risperidone and ziprasidone are potent antagonists at the 5-HT < sub > 7 </ sub > receptor as well, and selective antagonists of the receptor show antidepressant properties themselves.

Several firms are merchandising enzyme preparation through feed manufacturers.

Several instances of popular etymology are attested from ancient authors.

Several fully worked numerical examples are available.

Several unusual applications, such as a nuclear battery or fuel for space ships with nuclear propulsion, have been proposed for the isotope < sup > 242m </ sup > Am, but they are as yet hindered by the scarcity and high price of this nuclear isomer.

Several other oxidation states are known, which range from + 2 to + 7 and can be identified by their characteristic optical absorption spectra.

Several genera are popular with the horticultural community, including marigold, pot marigold ( also known as calendula ), cone flowers, various daisies, fleabane, chrysanthemums, dahlias, zinnias, and heleniums.

Several major cities exist either in the Andes or in the foothills, among which are Bogotá, Medellín and Cali, Colombia ; Quito, Ecuador ; Mérida, Venezuela ; La Paz, Bolivia ; Santiago, Chile, and Cusco, Peru.

Several species are raised for amaranth " grain " in Asia and the Americas.

Several cultivars are known, such as ' Albus ' ( with white flowers ), ' Sapphire ' ( dark blue flowers ), ' Aureus ' ( leaves striped with yellow ), and ' Variegatus ' ( leaves almost entirely white with a few green bands ).

Several organizations concerned with antimicrobial resistance are lobbying to eliminate the unnecessary use of antibacterials.

Several new features, including better scalability, enhanced clustering and management capabilities are mentioned.

Several manufacturers produce specialised acoustic guitar amplifiers, which are designed to give undistorted and full-range reproduction.

Combinations of the above techniques produce a " hybrid " or " hyphenated " technique .< ref name =" pmid9008869 "> Several examples are in popular use today and new hybrid techniques are under development.

Several anthems are included in the British coronation service.

Several proteins are involved, but two main methods of regulation have been identified: targeting mitochondria functionality, or directly transducing the signal via adaptor proteins to the apoptotic mechanisms.

Several crystal structures are known for AC-II enzymes.

Several other incidents connected with the story of Aeacus are mentioned by Ovid.

Several of its later bishops are known: Marinus in 325 ; Niconius in 344 ; Sylvanus at the beginning of the 5th century ; Pionius in 451 ; Leo in 787 ; Peter, friend of the Patriarch Ignatius, and adversary to Michael, in the ninth century.

Several roller coasters are specifically known by this name, including ;

Several crashed airplanes and large equipment such as bulldozers are scattered around the island.

Several topics that might be covered here are instead covered there because much more can be said about them in a human context.

Several areas at the edge of the neocortex, including the hippocampus and amygdala, are also much more extensively developed in mammals than in other vertebrates.

Several of the heavier bromine isotopes from fission are delayed neutron emitters.

Several English scholars and churchmen are described by Bede as being fluent in Greek due to being taught by him.

Several components that eventually played a key role in the development of the automobile were invented for the bicycle, including ball bearings, pneumatic tires, chain-driven sprockets, and tension-spoked wheels.

Several years after his death, a street on a new housing development in Tividale, West Midlands, was named Attlee Close in his memory.

Several companies, including Fairchild Semiconductor, RCA and Texas Instruments, picked up on the invention and began development programs.

Several DBMS products like Oracle and IBM DB2 have been in on-going development since the 1970s-1980s.

Several DBMS products like Oracle and IBM DB2 have been in on-going development since the 1970s-1980s.

Several of them gained their positions through the patronage of Yasser Arafat, who balanced above the different factions, and the era after his death in 2004 has seen increased infighting among these groups, who jockey for influence over future development, the political line, funds, and constituencies.

Several of the units were later used by Mattel Electronics engineers when it was discovered that, with a few minor modifications, a Keyboard Component could be used as an Intellivision software-development system in place of the original hand-built development boards.

Several times during the development of the Oz series, Baum declared that he had written his last Oz book and devoted himself to other works of fantasy fiction based in other magical lands, including The Life and Adventures of Santa Claus and Queen Zixi of Ix.

Several systems were under development, but none had reached operational status before the war's end.

Several different mitigation / prevention strategies are currently employed, from the development of infertile triploids to land-based farms which are completely isolated from any marine environment.

Several drivetrain layouts were considered during early development, including rear and mid-engined designs, but most were dismissed because of technical and / or legislative difficulties.

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 works of art and fiction significant to the development of the genre were produced before the genre had a name.

Several approaches have been proposed for the solution of this problem but development is currently still very much in progress.

Several different studies have been done that have led to the formation of the theory that post-fire development can be propagated by any of four pathways: self replacement, species-dominance relay, species replacement, or gap-phase self replacement.

Several independent game projects have joined WorldForge, resulting in a lot of parallel development.

Several preservation projects currently exist, in various stages of development, that archive many of the past demos.

Several studies show that high levels of cortisol within the bloodstream from the digestion of animal protein can contribute to the development of insulin resistance.

Several political parties were formed and jostled for independence and economic development.

Several just-in-time compilation ( JIT ) techniques were pioneered and improved in Self research as they were required to allow a very high level object oriented language to perform at up to half the speed of optimized C. Much of the development of Self took place at Sun Microsystems, and the techniques they developed were later deployed for Java's HotSpot virtual machine.

Several vaccine candidates are currently in various phases of research and development, including a number of ongoing clinical trials.

Several models have been created to describe coming out as a process for gay and lesbian identity development, e. g. Dank, 1971 ; Cass, 1984 ; Coleman, 1989 ; Troiden, 1989.

Several bilateral agreements provide a solid framework for cooperation in areas such as healthcare, defence, and technological research & development.

Several inventors followed Sturgeon in the development of DC motors but all encountered the same cost issues with primary battery power.