Certain kinds of organisms require particular additional elements, for example the magnesium in chlorophyll in green plants, the calcium in mollusc shells, or the iron in the hemoglobin in vertebrate animals ' red blood cells.

* Certain kinds of memory leaks, in which a program fails to free memory occupied by objects that have actually become unreachable, which leads to memory exhaustion if such a behavior is repeated indefinitely.

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 kinds of bubens are equipped with clanking metal rings, plates, cymbals, or little bells.

Certain drawing methods or approaches, such as " doodling " and other informal kinds of drawing such as drawing in the fog a shower leaves on a bathroom mirror, or 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 as part of " drawing " as a " fine art.

Certain kinds of instant dim sum have come onto the market in Hong Kong, Mainland China, Taiwan and Singapore.

Certain kinds of membrane proteins are involved in the process of fusing two bilayers together.

* Certain kinds of factories, such as steel mill, sugar mill, and cotton mill

Certain kinds of trauma that have powerful emotional effects are not given much notice yet can have devastating effects on psychosocial functioning.

Certain kinds of nuts were also available, and they were thrown at festivals much as sweets are today.

Certain species of Diospyros are the sources of most kinds of ebony wood, and not all species bear an edible fruit.

Certain kinds of fish, such as the Pacific whiting, cannot form firm surimi without additives such as egg white or potato starch.

Certain receptors are sensitive to certain types of stimuli ( for example, different mechanoreceptors respond best to different kinds of touch stimuli, like sharp or blunt objects ).

Certain kinds of filters use other materials inside a glass sandwich ; for example, polarizers often use various special films, netting filters have nylon netting, and so forth.

Certain kinds of questions were " off-limits ", such as name, age, occupation, and income.

Certain kinds of cura were assigned certain classes or types of troops ; for example, wall sentries were chosen only from Velites.

Certain kinds of illness, including tuberculosis and pneumonia, or symptoms such as sneezing, coughing, vomiting, and loss of consciousness, are believed by some Somalis to result from spirit possession, namely, the Ifrit of the spirit world.

Certain kinds of A / D converters known as delta-sigma converters produce disproportionately more quantization noise in the upper portion of their output spectrum.

Certain kinds of performance, therefore, cannot be assigned, because they create a unique relationship between the parties to the contract.

Certain kinds of evidence, such as documentary evidence, are subject to the requirement that the offeror provide the trial judge with a certain amount of evidence ( which need not be much and it need not be very strong ) suggesting that the offered item of tangible evidence ( e. g., a document, a gun ) is what the offeror claims it is.

Certain families can work certain kinds of magic.

Certain Indonesian dishes such as gado-gado, karedok, rujak, asinan, bubur ayam and certain kinds of soto were known to require certain type of krupuk for toppings.

Certain kinds of leukemias and lymphomas, including Mantle cell lymphoma, T-ALL, atypical B cell chronic lymphocytic leukemia, and T-PLL are also associated with ATM defects.

Certain kinds of pieces do not usually need glass when framed, including paintings done in acrylic or oil paint ( the former is usually waterproof ; the latter needs to breathe due to the decades-long drying process ), stained glass or tiles, and laminated posters.

Certain types of snips and shears are recommended for aviation metalworking.

A recent study done by the observer of Chinese film and television, Ying Zhu, suggests that “ CCTV is full of serious-minded creators who regularly experience bouts of self-doubt, philosophical ambivalence, and in some cases, clinical depression .” During her extensive interviews with key CCTV players, Zhu notes that “ Certain common themes, about ideals distorted or altogether thwarted by commercial and political pressure, emerged .”

Certain character classes require less experience than others to achieve a new level.

Certain regions also represent higher average salaries, with structural engineers in the Middle East in all sectors, and of every level of experience, earning £ 45, 083, compared to UK and EU countries where the average is £ 35, 164.

Certain enemies drain Link's experience when they attack, but he will never lose a level once raised.

" Certain elements in the film were taken from Mankiewicz's own experience: the sled Rosebud was based — according to some sources-on a very important bicycle that was stolen from him .... some of Kane's speeches are almost verbatim copies of Hearst's.

Certain enemies give ability points as well as experience points when defeated.

Certain subgroups of White Americans, while not identifying as separate races ( often identifying as having " American ethnicity "), have distinct heritages and experience discrimination and low socio-economic status as an ethnicity.

Certain formal qualifications ( i. e. degrees ) may be credited towards an application for the award, and the experience requirement reduced accordingly.

Certain Autocoder statements make provision for more parameters than may be contained in the operand ( columns 21 - 75 ) of a single line on the Autocoder coding sheet.

Certain high church services and other musical events in liturgical churches ( such as the Roman Catholic Mass and the Lutheran Divine Service ) may be a cappella, a practice remaining from apostolic times.

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 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 limitations, complications and special conventions may apply when alphabetical order is used:

Certain types of rules or customs may become law and regulatory legislation may be introduced to formalize or enforce the convention ( for example, laws that define on which side of the road vehicles must be driven ).

Certain self-limiting illnesses or minor injuries may not require further medical care past the first aid intervention.

Certain filter aids may be used to aid filtration.

Certain of his film related material and personal papers are contained in the Wesleyan University Cinema Archives to which scholars and media experts from around the world may have full access.

Certain elements of the game are reminiscent of rugby: for instance, the degree of force that defense may use to stop the attacker with the ball, together with the lack of protections and helmets.

Certain scholarship holds that the practices, emblems and architecture now commonly associated with the Hindu pantheon and Jainism may go back as far as Late Harappan times to the period 2000 – 1500 BCE.

Certain life insurance contracts accumulate cash values, which may be taken by the insured if the policy is surrendered or which may be borrowed against.

* Certain categories of person may be forbidden to strike ( airport personnel, health personnel, teachers, police or firemen, etc.

Certain foods such as soy may also suppress the proliferative effects of estrogen and are used as an alternative to hormone therapy.

Certain foods, such as dairy products, may be superheated to ensure pathogenic microbes are destroyed.

Certain scenarios or execution paths may be difficult to test, in which case the programmer may elect to test by inspection which involves a human inspecting the code on the relevant execution path, perhaps hand-executing the code.

Certain illumination algorithms and reflective or translucent materials may require more rays to be re-cast into the scene.

: Certain firewall designs and other circumstances may force a server to interleave RTSP methods and stream data.

Certain Army and Air Defense Force personnel ( i. e., commandos and paratroops ) may have worn camouflage uniforms.