Search Results

Number of Results: 128

C

C.O.D.

CADMIUM

CALCITE

CALCIUM

CALCIUM OXIDE

CALIBRATION

CALIGUS ELONGATUS

CALIGUS FLEXISPINA

CANCER

CANNIBALISM

CANNULA

CANNULATION

CANTHAXANTHIN

CAPILLARY

CAPILLARY ACTION

CARBOHYDRATE

CARBON CYCLE

CARBON DIOXIDE (CO<sub>2</sub>)

CARBON FILTER

CARBONATE

CARCINOGENIC

CARCINOMA

CARDIAC MYOPATHY SYNDROME

CARDIAC PUNCTURE

CARNIVOROUS

CAROFUR

CAROTENOIDS

CARRAGEENIN

CARRIER

CARRIER STATE

CARTILAGE

CARTILAGINOUS FISH

CASCADE

CATABOLISM

CATALYST

CATARACT

CATECHOLAMINE

CATHETER

CATHETERIZATION

CAUDAL PEDUNCLE

CAULIFLOWER DISEASE

CAUSATIVE AGENT

CAUSE-SPECIFIC MORTALITY RATE

CELL MEDIATED IMMUNITY

CELLULAR IMMUNE RESPONSE

CENTRIFUGE

CERCARIUM

CEROID

CESTODA

CHANNEL CATFISH VIRUS DISEASE (CCVD)

CHELA

CHELIPED

CHEMICAL FILTRATION

CHEMICAL OXYGEN DEMAND (COD)

CHEMOTHERAPY

CHILODONELLA

CHITIN

CHLAMYS

CHLORAMINES

CHLORAMPHENICOL

CHLORINATION

CHLORINE

CHLOROPHYLL

CHLORTETRACYCLINE

CHOLANGITIS

CHOLESTEROL

CHOLINE

CHROMAFFIN TISSUE

CHROMATOPHORES

CHROMATOSIS

CHRONIC

CHRONIC INFECTION

CIRRHOSIS

CLAM

CLEANER FISHES

CLEAR WATER METHOD

CLEARANCE TIME

CLINICAL

CLINICAL INFECTION

CLOSED (-CYCLE) SYSTEM

CLOTTING FACTOR

COAGULATION

COBALT

COCCIDIA

COCCIDOSIS

CODE OF PRACTICE

COLDWATER DISEASE

COLDWATER VIBRIOSIS

COLUMNARIS DISEASE

COMBUSTION

COMMUNICABLE DISEASE

COMPETITION

CONCENTRATION

CONCENTRATION RESPONSE CURVE

CONGENITAL

CONGESTION

CONSUMER

CONTAGIOUS DISEASE

CONTAGIOUSNESS

CONTAINMENT

CONTROL

COPEPODS

COPPER (Cu)

CORNEA

CORPUSCLE

CORPUSCLES OF STANNIUS

CORTISOL

COSTIASIS

COTTON WOOL DISEASE

COUNTERSTAIN

CRAB

CRASSOSTREA

CRAYFISH

CRITICAL THERMAL MAXIMUM (CTM)

CROSS INFECTION

CRUSTACEANS

CRYPTOCOTYLE

CTENOPHARYNGODON IDELLA

CULTCH

CUPPED OYSTER (Crassostrea )

CYANOBACTERIA

CYANOHAEMOGLOBIN

CYPRINIDS

CYST

CYTOPATHIC

CYTOPATHOLOGY

CYTOPLASM

a

b

c

d

e

f

g

h

i

j

k

l

m

n

o

p

q

r

s

t

u

v

w

x

y

z

CONCENTRATION

Definition

The quality of a specified substance in a given amount of the medium throughout which it is distributed. Several units are currently used to describe the concentrations of substances in water. Frequently, the weight of the substance contained within 1 litre is used in a weight/volume ratio (e.g. mg/l). Such units are often used interchangeably with ratios such as parts per million (ppm; e.g. 1mg of a substance in 1 litre, i.e. 1000g, of pure water = 1 ppm). Care should be taken, however, as these latter units are volume/volume or weight/weight. Parts per billion (ppb) may also be encountered but, because of the different interpretations of billion in various countries, this unit may be somewhat confusing. Weight/volume or volume/volume ratios may be converted into percentages (e.g. a 1% w/v solution = 1g of a substance in 100 ml). In addition concentration is often expressed as a number of atoms or molecules of a substance in a given volume. The standard unit is the mole that is equivalent to Avogadro¬´s number (6.02x1023 ) of atoms or molecules. In practical terms, the weight (in g) of 1 mole of atoms or molecules is given by the atomic or molecular weight of a substance and concentration expressed as mol/l.

English French Spanish Greek Norwegian Polish Hungarian Turkish Galician