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State in Biological Definition

Activation energy

... termed chemical kinetics . The transition state in a reaction is the point at which the original ... time. The energy required to reach the transition state is equal to the activation for that reaction. ... state). A substance that modifies the transition state to lower the activation energy is termed a ...

Equilibrium

... sciences. In general, a system is said to be in a state of equilibrium if all influences on the system ... examples are: Chemical equilibrium , the state in which a chemical reaction proceeds at the ... , also known as static equilibrium , the state of a body at rest or in uniform motion in which ...

Human

... Taxonomy of living primates , Minnesota state University Mankato, retrieved April 4, 2005 ... Origin of Language" by Amy Stafford, Minnesota state University Mankato, retrieved April 4, 2005 ... Literature Review" (pdf) by Karen Shaw, Montana state University-Billings, retrieved April 19, 2005 ...

Nutrition

... Study in this field must take into account the state of the animal before ingestion and after ... finding the difference between the pre ingestion state and the post digestion state. The effect may ... food. The closer the food is to its native state -- with minimal heating, salting and processing ...

Redox

... perform similar functions. The term redox state is often used to describe the balance of NAD + ... system such as a cell or organ. The redox state is reflected in the balance of several sets of ... is dependent on these ratios. An abnormal redox state can develop in a variety of deleterious ...

Photon

... 2.1 Creation 2.2 Spin 2.3 Quantum state 2.4 Molecular absorption 3 state in a vacuum 4 state in media 5 See also 6 Derived meanings ...

Protein

... a protein naturally folds is known as its native state , which is determined by its sequence of amino ... They may only exist in their active, or native state , in a small range of pH values and under ... distilled water . A protein that loses its native state is said to be denatured . Denatured proteins ...

Redox

... perform similar functions. The term redox state is often used to describe the balance of NAD + ... system such as a cell or organ. The redox state is reflected in the balance of several sets of ... is dependent on these ratios. An abnormal redox state can develop in a variety of deleterious ...

Rudolf Steiner

... power and the greatest economic power. Culture, state and Economy were fused (for example in ancient ... Increased separation between the state and the economy A rich man should be ... shareholder capitalism tends to absorb the state and human rights into the economic process and ...

Allostery

... of any ligand (substrate or otherwise), the equilibrium favors the T state over the R state. To summarize: all subunits must exist in the same conformation equilibrium favors the T state over the R state The binding of substrate to one subunit causes all ...

Allostery

... of any ligand (substrate or otherwise), the equilibrium favors the T state over the R state. To summarize: all subunits must exist in the same conformation equilibrium favors the T state over the R state The binding of substrate to one subunit causes all ...

Barr body

... which the father's X chromosome is always deactivated. The inactivation state of chromosomes is passed on to daughter cells during mitosis. Since random ... of choice, and allows downstream processes to establish the compact state of the Barr body. These changes include histone modifications, such as ...

Charles Darwin

... died in Downe, Kent , England, on 19 April 1882 and was given a state funeral. William Spottiswoode , President of the Royal Society ... Works 1836 – A LETTER, Containing Remarks on the Moral state of TAHITI, NEW ZEALAND, &c. – BY CAPT. R. FITZROY AND C. DARWIN, ...

Enzyme

... energy of a reaction, thus allowing the reaction to proceed to its steady state or completion much faster than it otherwise would; the enzyme (again, as ... end products of a particular reaction (including net energy), once steady state is reached, must always be identical, independent of the specific ...

Fick's law of diffusion

... year 1858 . Fick's First Law Fick's First Law is used in steady state diffusion , i.e., when the concentration within the diffusion volume does ... position Fick's Second Law Fick's Second Law is used in non-steady state diffusion, i.e., when the concentration within the diffusion volume ...

Flagellum

... in reorientation of the cell. The direction at the end of the tumble state is random. The length of the run state is extended when the bacteria moves through a favorable gradient. The ...

Lambda phage

... division of the host. The DNA of the prophage that is expressed in that state codes for proteins that look out for signs of stress in the host cell. ... by cI and Cro proteins. The lambda phage will remain in the lysogenic state if cI proteins predominate, but will be transformed into the lytic cycle ...

Stem cell

... embryonic stem cell research in the US will potentially develop at the state level, especially in California, due to the passing of California's Prop. ... approach California voted in Nov. 2004 to create a $3 billion state taxpayer-funded institute for stem cell research, the California ...

Thermoregulation

... is very different. This process is known as homeostasis : a dynamic state of stability between an animal's internal environment and its external ... by any form of stimulus; it is, in fact, narcotized by cold, and is in a state of what may be called "artificial hibernation." Once again this is ...

Alcohol

... and recreational reasons. While infrequent consumption of ethanol in small quantities may be harmless or even beneficial, larger doses result in a state known as drunkenness or intoxication and, depending on the dose and regularity of use, can cause acute respiratory failure or death and with ...

Alfred Russel Wallace

... to admire in all ... But whether there be a God and whatever be His nature; whether we have an immortal soul or not, or whatever may be our state after death, I can have no fear of having to suffer for the study of nature and the search for ... In 1864 , before Darwin had publicly ...

Artificial life

... accident), he began attempting to actualize Von Neumann's CA and the work of E.F. Codd , who had simplified Von Neumann's original twenty-nine state monster to one with only eight states. He succeeded in creating the first self-replicating computer organism in October of 1979, using only a Apple ...

Barbiturate

... Barbiturate abuse Barbiturates were very popular in the first half of the 20th century. In moderate amounts, these drugs produce a state of intoxication that is remarkably similar to alcohol intoxication . Symptoms include slurred speech, loss of motor coordination, and impaired ...

BLAST

... Stephen Altschul , Warren Gish , David Lipman at the U.S. National Center for Biotechnology Information (NCBI), Webb Miller at The Pennsylvania state University , and Gene Myers at the University of Arizona . It is available on the web at [1] . The original paper "Altschul, SF, W Gish, W ...

Brain

... Avian pallium Brain damage Coma Human brain Regions in the human brain The Memory-Prediction Framework Persistent vegetative state Traumatic brain injury References Bear, M.F., B.W. Conners, and M.A. Paradisa. 2001. Neuroscience: Exploring the Brain. Baltimore: ...

Capacitation

... Grace D.; Pan, Dieyun; Olds-Clarke, Patricia; and Kopf, Gregory S. (1995). Capacitation of mouse spermatozoa: I. Correlation between the capacitation state and protein tyrosine phosphorylation. Development 121 , 1129-1137. PMID 7743926 . full article text available on-line ...

Diabetes mellitus

... include the smell of acetone on the patient's breath (a sign of ketoacidosis ), Kussmaul breathing (a rapid, deep breathing), and any altered state of consciousness or arousal (hostility and mania are both possible, as is confusion and lethargy). The most dangerous form of altered consciousness ...

Ploidy

... have incorrect ploidy numbers, due to the accumulation of mutations which increase chromosome missegregation . Polyploidy Polyploidy is the state where all cells have multiple pairs of chromosomes beyond the basic set. Polyploidy is common in plants, and rare in animals. ...

Digital organism

... as a valid contribution to evolutionary biology by a growing number of evolutionary biologists. Evolutionary biologist Richard Lenski of Michigan state University has used Avida extensively in his work. Lenski, Adami, and their colleagues have published in journals such as Nature and the ...

Diffusion

... be modelled quantitatively using the diffusion equation , the solutions of which go by different names depending on the physical situation. Steady state bi-molecular diffusion is governed by Fick's first law . Steady-state thermal diffusion is governed by Fourier's Law. Diffusion of electrons in ...

Endosymbiont

... endosymbionts in marine metazoa and protists Excellent review paper covering the role of Symbiodinium in reef ecology and the current state of research: FLEXIBILITY AND SPECIFICITY IN CORAL-ALGAL SYMBIOSIS: Diversity, Ecology, and Biogeography of Symbiodinium. Andrew C. Baker, Annual ...

Endosymbiont

... endosymbionts in marine metazoa and protists Excellent review paper covering the role of Symbiodinium in reef ecology and the current state of research: FLEXIBILITY AND SPECIFICITY IN CORAL-ALGAL SYMBIOSIS: Diversity, Ecology, and Biogeography of Symbiodinium. Andrew C. Baker, Annual ...

Warm-blooded

... In winter , there may not be enough food to enable an endotherm to keep its metabolic rate stable all day, so some organisms go into a controlled state of hypothermia called hibernation , or torpor . This deliberately lowers the body temperature to conserve energy. In hot weather, endotherms ...

Epigenetics

... ). Other mechanisms have also been proposed. See epigenetic inheritance for a more detailed discussion. The epigenome is the overall epigenetic state of a cell. As one embryo can generate a multitude of cell fates during development, one genome could be said to give rise to many epigenomes. ...

Eugenics

... also practiced sterilization of "imbeciles" for much of the 20th century . The US Supreme Court ruled in the 1927 Buck v. Bell case that the state of Virginia could sterilize those they thought unfit. Between 1907 and 1963, the most significant era of eugenic sterilization , over 64,000 ...

Gene regulatory network

... for inputs and outputs, "on" corresponds to the substance being present. Time is viewed as proceeding in discrete steps. At each step, the new state of a node is a boolean function of the prior states of the nodes with arrows pointing towards it. The validity of the model can be tested by ...

Genomics

... hybridization or from direct sequence comparisons. Species Similarity Source Human 99.9% quoted by President Clinton, Jan 2000, state of the Union address; also Human Genome Project 100% identical twins Chimpanzee 98.4% sources: Americans ...

Ploidy

... have incorrect ploidy numbers, due to the accumulation of mutations which increase chromosome missegregation . Polyploidy Polyploidy is the state where all cells have multiple pairs of chromosomes beyond the basic set. Polyploidy is common in plants, and rare in animals. ...

Heterozygote

... it means that the organism carries two different versions of that gene on the two corresponding chromosomes . Heterozygosity refers to both the state of being a heterozygote, but more commonly in population genetics to the fraction of individuals in a population that are heterozygous for that ...

Homeostasis

... body fluids in multicellular animals. The body fluids include blood plasma , tissue fluid and intracellular fluid . The maintenance of a steady state in these fluids is essential to living things as the lack of it harms the genetic material. With regard to any parameter , an organism may be a ...
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