The inverse equation has a parametric form, which can easily be formulated using the equation of the flow curve
. If the original viscosity equation has the form [eta]=f (tau), than the inverse equation [eta] = g([??]) has the following parametric representation:
In a uroflowmetric examination, measurements of maximum flow rate ([Q.sub.max]), voiding time (VT), voided volume (VV), PVR, flow curve
(FC), and pelvic floor activities (using electromyography [EMG]) can be performed (see Figure 1).
Each flow curve
increases sharply to the peak stress at a very small strain ( [less than or equal to] 0.03).
In both ingredients, viscosity remains nearly constant with time until an exponential and sharp increase of viscosity is registered at a particular time indicating the formation of a rigid structure due to the fact that shearing promotes the formation of a network structure associated with the modification of the sample, which confirms the rheopectic cycle observed in the flow curve
The biggest influence of bimodality (Table 3) was determined on ELAD (it was 13.2% higher of cows with bimodal milk flow curve
, compared with the normal curve), ELND (12.9% less of cows with bimodal milk flow curve
) and ELST (8.7% higher of cows with bimodal milk flow curve
); bimodality on ELMAX almost had no influence (the difference 0.6%).
The flow curve
is therefore a straight line through the origin of the coordinate axes.
Time function during the stress growth or flow curve
Food QC labs may use a single data point or possibly the entire flow curve
to qualify a filling.
The main reason for the iterated misconvergence is that the non-linear flow curve
is not divided into proper sections.
The heat flow curve
of pure ammonium perchlorate (Fig.
The curve equations can be used, for example, to find the intersection point of a flow curve
with the system curve.
UF is useful as a screening tool in select patients for more complex urodynamic testing and is an objective method to determine response to treatment of lower urinary tract disorders.[sup.1,2] The International Continence Society (ICCS) has attempted to standardize certain objective measurements to be recorded during uroflowmetry, including flow curve
pattern, maximum flow rate, average flow rate, flow time, voided volume and time to maximum flow.[sup.3] UF is frequently used in daily pediatric urology (PU) practice for diagnostic and follow-up purposes.