Enzyme activity

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activity

 [ak-tiv´ĭ-te]
1. the quality or process of exerting energy or of accomplishing an effect.
2. a thermodynamic quantity that represents the effective concentration of a solute in a non-ideal solution. Symbol a.
3. the number of disintegrations per unit of a radioactive material. Symbol A.
4. the presence of recordable electrical energy in a nerve or muscle.
a's of daily living (ADL) activities that are necessary for daily care of oneself and independent community living. It includes using the toilet and grooming, dressing, and feeding oneself; independent community living includes driving, shopping, homemaking, care of family, work activities, and so on. See also self care, self care deficit, and self care assistance.(See accompanying table.)
deficient diversional activity a nursing diagnosis approved by the North American Nursing Diagnosis Association, defined as the experiencing by an individual of decreased stimulation from, interest in, or engagement in recreational or leisure activities. Formerly called diversional activity deficit. Possible causes include prolonged hospitalization or immobility at home, frequent and lengthy treatments such as renal dialysis, and a monotonous, nonstimulating environment. The patient usually gives subjective evidence that this condition exists by verbalizing a feeling of boredom or stating a desire for something to do or gives objective evidence by acting depressed or restless.

Nursing interventions that could be appropriate for diversional activity deficit include interviewing the patient to assess the current situation and to assist in developing plans for activities that provide interest and stimulation. These activities could include music, games, reading, handwork, or any other pastimes enjoyed by the patient. Patients may need assistance in identifying available resources and motivation to take advantage of the activities they provide.
enzyme activity the catalytic effect exerted by an enzyme, expressed as units per milligram of enzyme (specific activity) or molecules of substrate transformed per minute per molecule of enzyme (molecular activity).
malignant ventricular ectopic activity ventricular fibrillation or ventricular tachycardia with syncope, heart failure, myocardial ischemia, or hypotension.
optical activity the ability of a chemical compound to rotate the plane of polarization of plane-polarized light.
physical activity bodily movements, such as those accompanying activities of daily living.
pulseless electrical activity (PEA) continued electrical rhythmicity of the heart in the absence of effective mechanical function; it may be due to uncoupling of ventricular muscle contraction from electrical activity or may be secondary to cardiac damage with respiratory failure and cessation of cardiac venous return. Called also electromechanical dissociation.
purposeful activity in occupational therapy, tasks or experiences in which the individual actively participates that require and elicit coordination between the sensory, motor, cognitive, and psychological systems. Each person has a unique set of purposeful activities, influenced by his or her life roles, and, when doing one of them, directs attention to the task itself rather than to the internal processes involved. Activities may yield immediate results or may require sustained effort and repetition, and they may either represent new responses or be part of complex, longstanding patterns of behavior.
sustained rhythmic activity the continuous generation of action potentials within the heart in the absence of artificial or external stimulation.
triggered activity activity in which nondriven action potentials arise from afterpotentials that were caused by the previous action potential.

Enzyme activity

A measure of the ability of an enzyme to catalyze a specific reaction.

activity

the quality or process of releasing energy or of accomplishing an effect.

displacement activity
an instinctive behavior pattern, exhibited out of context and believed to be a means of relieving tension in the animal. Usually performed when the animal is in a state of high arousal or when it is frustrated in the performance of some instinctive activity. Seen as sexual mounting, digging, tail chasing, or excessive grooming in cats.
economic activity
a method of producing a specific product, e.g. fine wool, white veal.
enzyme activity
the catalytic effect exerted by an enzyme, expressed as units per milligram of enzyme (specific activity) or molecules of substrate transformed per minute per molecule of enzyme (molecular activity).
activity gross income
the total value of production, rather than the income, for a particular activity.
activity gross margin
the gross income of an activity less its variable costs.
intermediate activity
production of a commodity which is not sold but is used as an input to some other enterprise, e.g. crop used on the farm as stock feed.
optical activity
the ability of a chemical compound to rotate the plane of polarization of plane-polarized light.
References in periodicals archive ?
Enzyme assay kits for lactate dehydrogenase (LDH) and glucose-6-phosphate-dehydrogenase (G6PDH), acid phosphatase (ACP), alkaline phosphatase (ALP), alanine transaminase (ALT), aspartate transaminase (AST) kits were products of Randox Laboratories limited; United Kingdom, and were supplied by LIMED International Limited, Idumota Lagos State, Nigeria.
The purpose of this case report is to identify clinical presentation and classical MRI findings to diagnose MLD in absence of enzyme assay and gene mutation analysis.
Multiplex enzyme assay screening of dried blood spots for lysosomal storage disorders by using tandem mass spectrometry.
The supernatant was used as the crude extracellular enzyme source for enzyme assay.
This enzyme assay uses a rapid aqueous extraction, and an enzymatic reaction that requires only 20 minutes to reach completion.
Methylene blue reduction test is useful screening procedure, so the quantitative enzyme assay must be used for a definitive diagnosis of G6PD deficiency.
According to the company, the PLAC Test for Lp-PLA2 Activity is an enzyme assay for the quantitative determination of Lp-PLA2 (Lipoprotein-Associated Phospholipase A2) activity in human plasma and serum.
Crude enzyme extract was obtained by centrifugation of a sample at 13,000 gx10 min at 4[degrees]C, and clear supernatants were used for enzyme assay.
At time intervals, the turbidity of the culture was determined by measuring the increase in optical density at 600 nm and the enzyme assay was done to determine the enzyme activity.
Enzyme activity was determined at pH 6 in the same manner as described for enzyme assay.