Willard Thorp, in his new book, American Writing In The Twentieth Century, observes, quite validly it seems: `` Certain subjects are conspicuously absent or have been only lightly touched.

Certain other deductions are not allowed in determining Adjusted Gross Income.

Certain pianistic traits are common to all five Schnabelian renditions, most notably the `` Schnabel trill '' ( which differs from the conventional trill in that the two notes are struck simultaneously ).

Certain other properties of small particles, in addition to those already mentioned in connection with penetration of the respiratory tract, are noteworthy in defense considerations.

Certain badly disillusioned market critics are often apt to feel that there is something somehow unfair, dirty, or even thoroughly criminal about this interplay of competitive forces.

Certain specific conditions are excluded as disabilities, such as current substance abuse and visual impairment that is correctable by prescription lenses.

Certain indigenous religious groups such as the Australian Aborigines are more typically totemic, whereas others like the Inuit are more typically animistic in their worldview.

Certain stones, when examined in thin sections by transmitted light, show a diffraction spectrum due to the extreme delicacy of the successive bands, whence they are termed rainbow agates.

Certain object types, including ACIS solids and regions, are not documented.

Certain natural substances are reputed to have anxiolytic properties, including the following:

Certain international trade laws, such as those on intellectual property, are also enforced in India.

Certain other state agencies enjoy considerable operational independence and autonomy ; they include the electrical power, the nationalized commercial banks ( which are open to competition from private banks ), and the social security agency.

Certain elements have no stable isotopes and are composed only of radioactive isotopes: specifically the elements without any stable isotopes are technetium ( atomic number 43 ), promethium ( atomic number 61 ), and all observed elements with atomic numbers greater than 82.

Certain people are known even to people unfamiliar with the area in which they excelled.

Certain Jewish thinkers, such as Maimonides, believed that concubines are strictly reserved for kings, and thus that a commoner may not have a concubine ; indeed, such thinkers argued that commoners may not engage in any type of sexual relations outside of a marriage.

Certain sub-castes are shunned more than others.

Certain Latin-Rite Catholic priests may receive a dispensation to be married before ordination, and all Eastern Catholic priests outside the United States are also permitted to be married, provided they are so before ordination.

Certain drawing methods or approaches, such as " doodling ," other informal kinds of drawing, and the surrealist method of " entopic graphomania ", in which dots are made at the sites of impurities in a blank sheet of paper, and lines are then made between the dots, may or may not be considered part of " drawing " as a " fine art ".

Certain forms of the gene are associated with a mild form of epilepsy.

Certain aspects of XP have changed since the book Extreme Programming Refactored ( 2003 ) was published ; in particular, XP now accommodates modifications to the practices as long as the required objectives are still met.

Certain mushrooms, especially polypores like Reishi were thought to be able to benefit a wide variety of health ailments.

Certain architectures may allow two or three operands ( including the result ) directly in memory or may be able to perform functions such as automatic pointer increment etc.

Certain safety features can be built into the remote desktop software protocols such that the administrator is not able to delete or otherwise alter files without the target user ’ s permission.

Certain pieces of legislation however must be approved by both Houses and are not able to be forced through by the Commons under the Parliament Act.

Edmond Malone exposes them in his An Inquiry into the Authenticity of Certain Miscellaneous Papers and Legal Instruments on 31 March, and the forged ' Shakespearean ' play, Vortigern and Rowena, is able to sustain just a single performance at the Theatre Royal, Drury Lane, London, on 2 April.

Certain species are able to produce their own chemicals de novo without dietary influence.

Certain that Udo will seek revenge, and convinced the police will not be able to protect him and his family, Nick sends Nettie and the children to the country.

Certain of his students ( most notably Otto Demus, Fritz Novotny, and Ernst Diez ) were successfully able to pursue these interests without subscribing to their teacher's ideology.

Certain machines and processes allow for slow freezing and the removal of impurities and therefore are able to produce the clear blocks of ice that are favored by ice carvers.

Certain armor combinations provide the user with skills such as fast eating ( drinking potions faster ) or being able to sharpen your weapon fast and better.

Certain sources indicate that, created at the beginning of time, Israfel possesses four wings, and is so tall as to be able to reach from the earth to the pillars of Heaven.

Certain courts are able to overrule decisions of a court of co-ordinate jurisdiction — however, out of interests of judicial comity, they generally try to follow co-ordinate rationes.

Certain night flying insects that are attracted to the orchid's fragrant are able to obtain its nectar with their long proboscis.

Certain cyclometers are able to measure cadence, and relay the reading to the cyclist via a display, typically mounted on the bicycle's handlebars.

Certain chemical agents and drugs can also be associated with the genesis of autoimmune conditions, or conditions that simulate autoimmune diseases.

Certain ceramic materials have low density, chemical inertness, high strength, hardness and temperature capability ; nanocrystalline ceramics have even greater strength and higher superplasticity.

Certain squid and small crustaceans use bioluminescent chemical mixtures or bioluminescent bacterial slurries in the same way as many squid use ink.

Certain poisonous vapors or gases ( as for example in chemical warfare ), or vomit can have a similar effect.

Certain chemical changes must first occur for knock to happen, hence fuels with certain structures tend to knock easier than others.

Certain chemical reactions also result in glasses.

* Certain psychedelic mushrooms are used by Indians in Latin America, especially in the state of Oaxaca in southern Mexico The chief species is Psilocybe mexicana, of which the active principles are psilocin and its derivative psilocybin, in their chemical composition and activity not unlike LSD ( D-lysergic acid diethylamide ); the latter is synthesized from the alkaloids ( principally ergotamine and ergonovine ) that are constituents of ergot, a growth present in grasses affected by the disease also called ergot.

Certain plastics with chemical dipoles, such as PVC, polyamides ( PA ) and acetates can be heated with high frequency electromagnetic waves.

Certain nutrients, including many vitamins and amino acids, are degraded by the temperatures, pressures and chemical treatments used during manufacture, and hence must be added after manufacture to avoid nutritional deficiency.

Certain chemical manipulations can be performed on glyceraldehyde without affecting its configuration, and its historical use for this purpose ( possibly combined with its convenience as one of the smallest commonly used chiral molecules ) has resulted in its use for nomenclature.

Certain genes cause chemical reactions that result in the development of testes.

Certain pharmaceutical companies such as Pfizer continue to promote drugs like Zoloft with advertisements asserting that mental illness may be due to chemical imbalances in the brain, and that their drugs work to " correct " this imbalance.

Certain pressure relief valves for chemical use are not designed to relieve the pressure when in contact with liquids.