One drop of each sample was added to one drop of a 2% suspension of group Af or group B red cells in a small Af test tube.

A sample of Fraction Af from group O plasma was dissolved in starting buffer, dialyzed against this buffer and subjected to chromatography using the gradient shown in Fig. 2.

For purposes of sample selection only ( individual tests were given later ) we obtained group test scores of reading achievement and intelligence from school records of the entire third-grade population in each school system.

Then the required information is collected from a simple random sample of the elements within each selected group.

For example in a paper reporting on a study involving human subjects, there typically appears a table giving the overall sample size, sample sizes in important subgroups ( e. g., for each treatment or exposure group ), and demographic or clinical characteristics such as the average age, the proportion of subjects of each sex, and the proportion of subjects with related comorbidities.

Provided the sample size is adequate, the risks associated with random allocation ( such as failing to obtain a representative sample in a survey, or having a serious imbalance in a key characteristic between a treatment group and a control group ) are calculable and hence can be managed down to an acceptable level.

* Robin Dunbar, Coevolution of neocortical size, group size and language in humans ( pre-publication version ) " Analysis of a sample of human conversations shows that about 60 % of time is spent gossiping about relationships and personal experiences.

Also, if the group that is underrepresented does not differ markedly from the other groups in the quantity being measured, then a random sample can still be a reasonable approximation.

This sample included an over-representation of individuals who were rich, who, as a group, were more likely to vote for the Republican candidate.

Natrolite is a mineral series in the zeolite group ; this sample has a very prominent acicular crystal habit.

In April 1861, the group published the first sample pages ; later that month, the thirty year old Coleridge died of tuberculosis.

In 1926, an Italian and an American group claimed to have isolated a sample of element 61 ; both " discoveries " were soon proven to be false.

In a poll conducted by Ipsos-Reid following the first prorogation of the 40th parliament on December 4, 2008, it was found that 51 % of the sample group thought the prime minister was directly elected by Canadians.

Of the 8 respondents ( out of a sample of 202 ) who reported a change in sexual orientation, 7 worked as ex-gay counselors or group leaders.

Another easy way without having to calculate the percentage is to multiply each group size by the sample size and divide by the total population size ( size of entire staff ):

" Also, the song " You Know What You Are " from the 1988 album The Land of Rape and Honey by industrial metal group Ministry repeats the song title ( a portion of Tuco's final epithet at Blondie ) as a background sample.

# Since usability is related to the specific set of users, such a small sample size is unlikely to be representative of the total population so the data from such a small sample is more likely to reflect the sample group than the population they may represent

Methods of the first group employ electron emission from the sample induced by photon absorption ( photoemission ), by high temperature ( thermionic emission ), due to an electric field ( field electron emission ), or using electron tunnelling.

The apparatus consists of an oven in which the compound to be distilled is placed, a receiving portion which is outside of the oven, and a means of rotating the sample.

After drawing a sample story and sketch for their editor and receiving approval, Ohkawa assigns the roles to each group member and then chooses the visual styles depending on factors such as the complexity of the story, the chosen art style, and its relationship to the group's other works.

For example, an analyst may say fifteen minutes after receiving the sample: " This is gasoline bought at a Chevron station in the past two weeks.

To match the example above, if the receiving SIGSALY got a sample value of 4 with a matching random value of 5, then the addition would be as follows:

Even after receiving samples, sample recipients remain disproportionately burdened by prescription costs.

A presentation at Kiwicon showed that the rest of the world was still critically vulnerable to this security hole, with a sample domain registered in New Zealand for testing purposes receiving proxy requests from all over the country at the rate of several a second.

A scintillation counter was placed below the receiving < sup > 57 </ sup > Fe sample to detect the gamma rays that were not absorbed by the receiving sample.

When the Doppler shift canceled out the gravitational blueshift, the receiving sample absorbed gamma rays and the number of gamma rays detected by the scintillation counter dropped accordingly.

The popularity of the book also affected research into these drugs, because researchers needed a random sample of subjects with no preconceptions about the drug in order to conduct experiments, and these became very difficult to find.

In 2001 a version of Byrne's single “ Like Humans Do ”, edited to remove its drug reference, was selected by Microsoft as the sample music for Windows XP to demonstrate Windows Media Player ( not included in SP2 installs ).

If an ELISA test is used for drug screening at workplace, a cut-off concentration, 50 ng / ml, for example, is established, and a sample containing the standard concentration of analyte will be prepared.

The bacterium from which the drug is derived was discovered in the late 1950s in a soil sample taken from " an uncultivated sandy soil in a grassland region " at Blue Rapids.

Also, because of the differing levels of severity from one person to another, some people's first experience of the problem is when, for the first time, they " lock up " attempting to produce a sample for a drug test.

can be beneficial, and benzodiazepines such as Xanax, Valium, or Klonopin can be used before the drug test or while in public to relax the muscles and bring the anxiety level down enough to where you can produce a sample.

An assay is an investigative ( analytic ) procedure in laboratory medicine, pharmacology, environmental biology, and molecular biology for qualitatively assessing or quantitatively measuring the presence or amount or the functional activity of a target entity ( the analyte ) which can be a drug or biochemical substance or a cell in an organism or organic sample.

The test usually needs to be performed within 12 – 72 hours, depending on which drug the sample is being tested for.

Then they would take aliquots of the sample to test for the antimicrobial activity of a specific drug or protein ( antimicrobial peptides ).

Furthermore, in the case of drug and diagnostic development as many as 12 or more assays may be run for each sample.

Such techniques allow researchers to study the effects of particular substances and / or situations on a cellular sample at a genomic level ( for example, by addition of a drug, or by placing cells in a situation of stress ).

The substance may also have been diluted by its dispersal through the body ; while a pill or other regulated dose of a drug may have grams or milligrams of the active constituent, an individual sample under investigation may only contain micrograms or nanograms.

The manufacturers or their agents usually select a representative sample of patients for whom the drug is designed – at most a few thousand – along with a comparable control group.

The song contained a sample of " The Bottle " by Gil Scott-Heron, one of the most important progenitors of rap music, at that time imprisoned for one to three years following series of drug possession charges.

a baby monkey rolling up into a ball and sucking his penis, an infant monkey with disease Shigella crawling about in his own filth, an adult rhesus who was so crazy that he had bitten his arms, bitten off almost all the flesh, an individual capuchin who had been used in drug research sitting with staring eyes, clearly in the last stages of depression, a monkey strapped down and submitted to a horribly painful electro ejaculation process with electrodes strapped on his penis, just to get a semen sample ...

Carl extracts a sample from the monkey and injects himself, intending to smuggle the drug out of the lab in his own body.

For example, if we are interested in estimating the amount by which a drug lowers a subject's blood pressure with a confidence interval that is six units wide, and we know that the standard deviation of blood pressure in the population is 15, then the required sample size is 100.

It was isolated from the crude drug — from a museum sample of curare — in 1935 by Harold King ( 1887 – 1956 ) of London, working in Sir Henry Dale ’ s laboratory.

A small volume ( typically a few microliters ) of a drug sample or other unknown substance that has been dissolved in an organic solvent ( such as chloroform or methanol ) is quickly injected into the hot column.

In that tournament, Carlyle failed the A sample of a drug test, but was cleared of any improper drug use when his B sample came back clean.

A spokesperson for Happy Valley Farms named Skippy arrives with a sample of a drug that wreaks havoc on the language centers of the brain.