--%>
Assignment Help - homework help

  Heavy metals

Heavy metals

The heavy metals such as mercury, silver and copper and their salts are efficient anti-microbial agents. Mercuric chloride (i.e., bichloride of mercury) at 0.1% concentration is employed as a surface sterilizing agent in laboratory. Since of its corrosive action on metals and toxicity to animals its use is restricted. Organic compounds such as mercurochrome, merthiolate are less toxic and thus employed as antiseptics on cutaneous and mucosal surfaces.

The practice of treating the eyes of new born babies with some drops of 0.1% silver nitrate to prevent the gonococcal infection of eyes is familiar. Silver nitrate at 0.1% is bactericidal to most organisms and it is broadly used. A colloidal solution comprising of a protein with metallic silver or silver oxide is also employed as antiseptic. The Bordeaux mixture, the primary known fungicide generated to combat downy mildew of grapes is a mixture of copper sulphate and lime. Even nowadays copper fungicides such as copper oxychloride are obtainable in market.

Copper sulphate is more efficient against fungi, algae, and bacteria.  It is employed at 2ppm levels to control algae in swimming pool.

The antimicrobial activity of heavy metals is due to their mixture with proteins and their inactivation. At very high concentrations they all coagulate cytoplasmic proteins resultant in damage or death of cells. Mercury reacts with sulfhydryl classes of enzymes and inactivates them. To be efficient as disinfectants they have to be utilized after cleaning the organic matter as its presence decreases their action. The copper is toxic at high concentration. It is to be noted here that copper though toxic is needed in traces for the function of some copper containing enzymes. The lethal effect by some metals at very small quantities on bacteria is termed as oligodynamic action.

 

Latest technology based Biology Online Tutoring Assistance

Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in General Microbiology help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for General Microbiology, project ideas and tutorials. We provide email based General Microbiology help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in General Microbiology. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Microbiology Homework help and assignment help services. They use their experience, as they have solved thousands of the Biology assignments, which may help you to solve your complex issues of General Microbiology. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.