If a field has a value of null, it means that the value is unknown. A null value is not the same as a value of zero, and the difference can be crucial. For example, when calculating the average value of a field among many records where one row ...

The two null values suggest that the population value is zero, so it was decided to perform a confirmatory single-mean t-test for the 20-trial case, with the subject as the unit of analysis and MCE of zero.

The meaning of NULL CELL is a lymphocyte in the blood that does not have on its surface the receptors typical of either mature B cells or T cells.

All Acronyms. Null [Internet]; June 21, 2022 [cited 2022 JUN 21]. Available from: https://www.allacronyms.com/NULL. Filter abbreviations by category · Biology · Biomedical Research · Biomedicine · Food · Medical · Nutrition · Oncology · Physiology ·

May 27, 2025 - Null cells, a subset of large circulating white blood cells, mimic the appearance of T or B lymphocytes but do not possess their defining surface receptors. Predominantly, these include natural killer cells (NK cells), with a lesser portion ...

A dictionary of more than 150 genetics-related terms written for healthcare professionals. This resource was developed to support the comprehensive, evidence-based, peer-reviewed PDQ cancer genetics information summaries.

July 25, 2023 - Every medical researcher dreams of doing studies or conducting clinical trials that generate results so compelling they change how diseases are treated or health policy is written. In reality, we are lucky if the results are even a little bit positive, and often end up with “null” results, meaning that the effect of a policy, drug, or clinical intervention that we tested is no different than that of some alternative.

June 23, 2016 - Completely absent; a set with no members or of zero magnitude. If a field has a value of null, it means that the value is unknown. A null value is not the same as a value of zero, and the difference can be crucial. ... Medical NULL abbreviation meaning defined here.

February 27, 2021 - Medical NULL abbreviation meaning defined here. What does NULL stand for in Medical? Get the most popular NULL abbreviation related to Medical.

June 3, 2021 - Medical Editor: Jay W. Marks, MD ... Null mutation: A mutation (a change) in a gene that leads to its not being transcribed into RNA and/or translated into a functional protein product.

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Monitor on Psychology, 35(11). https://www.apa.org/monitor/dec04/null ... Beginning this July, 11 medical journals, including the New England Journal of Medicine, will publish only those clinical studies registered in a publicly available database prior to being conducted.

May 1, 2025 - Please consult with a healthcare professional for medical advice and treatment. Print ... The null syndrome is part of the Pelizaeus-Merzbacher disease (PMD) spectrum and is characterized by mild PMD features associated with demyelinating peripheral neuropathy.

March 11, 2014 - When I draw or make diagram for the results of my physical examination findings in a medical record, I use the null sign to mean negative. Before I use these two symbols: (+) to mean positive and (…

The combining form nulli- means “no, none, null.” · Nulliparous is the medical term for a woman who has never given birth.

Usually means: Absence of data or value. Definitions Related words Phrases Mentions Lyrics History Colors ... Null (Foetus EP), Null (Intronaut EP), Null (SQL), Null (comics), Null (computer programming), Null (computing), Null (disambiguation), ...

June 12, 2018 - In most cases, null has a more specific meaning that depends on the context. Sometimes it is important to know why a reference points to null. Consider the following function signature in a medical application:

The meaning of NULL is having no legal or binding force : invalid. How to use null in a sentence. Did you know?