Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Urine preservatives - Specimen collection:
Urine preservatives: preservatives have different roles but are usually added to reduce bacterial action or chemical decomposition or to solubilize constituents that might otherwise precipitate out of solution. Another application is to decrease atmospheric oxidation of unstable compounds. Some specimens should have no preservative added because of possibility of interference with analytical methods. One of the most satisfactory forms of preservation of urine specimens is refrigeration immediately after collection. Urine preservative tablets contain many compounds that act on decreasing the pH of the urine or releasing of formaldehyde. Formalin is also used, but in large amounts it precipitate urea and inhibit certain reactions.
Acidification below pH 3 is widely used to preserve 24 hr urine specimens and is particularly useful for specimens for calcium, steroid, vanillylmandelic acid (VMA) determination (10 ml of HCl, 6 mol/L, per 24 hr excretion).
Sulfamic acid (10 g/L urine) is also used to educe pH. Boric acid ( 5 mg/30 ml) has been also used During acidification, precipitation of urates will occur, thereby rendering a specimen unsuitable for measurement of uric acid. Although thymol and chloroform were widely used in the past to preserve specimens for chemical and microscopic examination. Toluene is the only organic solvent that is still in use as a preservative. A mild base, such as sodium bicarbonate or small amount of NaOH, is used to preserve porphyrins, urobilinogen, and uric acid. When timed collection is complete, the specimen should be delivered without delay to the laboratory.
Production management: In this Secetion, you have studied the introduction of production management. Functional units in an organization, features of production management and
Let consider the breakwater configuration shown in the figure below. The incident wave conditions at the breakwater are a wave height of 1.5m, wave period of 7.0s and a wave crest
(a) A mass of 1 kg is to be supported on a spring having a stiffness of 9800N/m. The damping coefficient is 5.9 N-sec/m. Calculate the natural frequency of the system. Determine al
An engine uses air as the operating substance. At the beginning of compression the pressure is 90 KN /m 2 and the temp. is 40 0 C. During the adiabatic compression, the volume is
Spot welding of different metals-Stainless steel Stainless steel is having lower thermal conductivity compared to mild steel. Therefore, it requires less heat input. But, stain
With the help of a neat diagram illustrate the working of Gasifier combined cycle power plant. Describe with the help of neat diagram the working of Pressurised water reactor nu
Determine the Properties of foundation Soil profile together with natural type and properties of each strata will have a bearing on the choice of foundation. The fact that loa
Quality Improvement : CAD can improve the quality of engineering design by increasing the efficiency and effectiveness of the designers. This can be observed with excellent
Functions of the Piston To transmit force of explosion to the crankshaft. To form a seal so that high pressure gases from the combustion chamber do not escape into th
Write down the energy balance for a vapor stream going through a throttling valve (a valve that just reduces the pressure). State your assumptions. Suppose a nonvolatile materi
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd