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 ?
This enzyme assay uses a rapid aqueous extraction, and an enzymatic reaction that requires only 20 minutes to reach completion.
Based in Malvern, PA, RBC specializes in providing high quality biochemical enzyme assay data, using ultra-low volumes and proprietary methods.
NewBorn Screening Market by Test Type (Dried Blood Spot, Hearing Screening, CCHD), Technology (Tandem Mass Spectrometry, Immunoassay, Enzyme Assay, Electrophoresis, Pulse Oximeter), Instrument, Accessories, Reagent & Assay Kit - Global Forecast to 2019
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.
A similar but not identical discrepancy was seen with a multiplex GALE ultraperformance liquid chromatographyMS/MS-based enzyme assay compared to a radiometric assay (15,16).
Although the conditions for each enzyme assay were different (for details, see Table 1), the enzymatic assays were all run in a similar format.
who found no difference between the sensitivities of clade 1 and clade 2 isolates to oseltamivir in the enzyme assay (6), although many of the isolates were the same as those tested here.
Enzyme assay was carried out in duplicate and the average values are given.
Sarcoidosis: correlation of HRCT findings with results of pulmonary function tests and serum angiotensin-converting enzyme assay.
The assignment was based on the enzyme assay and reaction product characterization of the homologous protein from Escherichia coli.
This book is intended as a basic primer for enzyme assay.