Give the significance of sterilization using bactericidal solution, explain the method and name the bactericidal agents.

1 Answer

Answer :

Significance: The lethal effect of bactericide increases with the rise of temperature. This method is used for sterilizing aqueous preparation, which is unstable at the higher temperature, hence moist heat sterilization is not applicable method for sterilization. It is official in British Pharmacopoeia and Indian Pharmacopoeia. 


Method 

In this process the medicament is dissolved or suspended in a suitable solution of following bactericidal, as given in table, then preparation is sealed in final container and heated at 98°-100°C for 30 minutes in boiling water. IP 1985 permitted the use of following bactericides


image

Related questions

Description : Give principle, method and application of sterilization using UV radiation.

Last Answer : Principle:   Direct sunlight can destroy the microorganism on account of its ultra-violet rays of longer wave length. UV light of shorter wavelength kills or inactivates microorganisms by ... . Sterilization of thermolabile material. Sterilization of surface of working table.

Description : Write in detail about moist heat method of sterilization

Last Answer : Principle: The steam has more penetration power than dry heat and thermal capacity of steam is more than thermal capacity of dry heat. The method is useful for killing of bacterial spores. ... for powder or oils. It is not suitable for sterilization of plastic which melt at 1150C.

Description : Describe dry heat method of sterilization in detail.

Last Answer : Principle: All the microorganism including spores are destroyed. Principle of killing is by dehydration and oxidation of essential metabolites. In hot air oven heating is done at 1600 C for 2 hours. ... off the oven. Allow to cool. Take out the material.  Diagram:

Description : Discuss in brief gaseous sterilization using ethylene oxide. 

Last Answer : Gaseous sterilization using Ethylene oxide:  It is gas at room temperature, highly inflammable & forms explosive mixture with air. This disadvantage can be overcome by using mixture of 10% ethylene ... toxic & inflammable gas. Sophisticated instruments are required & skilled persons are needed.

Description : Give advantages, disadvantages and applications of sterilization by ionising radiation.

Last Answer : Advantages: The method is reliable and can be accurately controlled No degradation of media during sterilization, thus it can be used for thermally labile media Gamma rays have ... Bones and tissue transplant, plastic tubing, catheters and sutures. Sterilization of thermolabile medicaments. 

Description : Define: i) Sterilization ii) Disinfection Classify different methods of sterilization.

Last Answer : i) Sterilization: Sterilization is a process of complete destruction of all micro-organisms & their spores present in a system. ii) Disinfection: A process that removes the infection potential by ... ) Seitz filters 3) Sintered glass filters 4) Sintered metal filters 5) Membrane filters

Description : Describe construction and working of equipment used for moist heat sterilization. 

Last Answer : Moist heat sterilizer or Autoclave:  Diagram:  Construction:  It consists of a string metallic chamber usually made of stainless steel. It has a cover fitted with a steam vent, pressure gauze ... whole of the steam is removed, the lid is opened and the sterilized material is taken out.

Description : Differentiate between sterilization and Disinfection. Enlist the different methods of sterilization.

Last Answer : Sterilization Disinfection It is the process of complete destruction of microorganisms present in the system It is process that removes infection potential by microorganisms In case of ... Seitz filters 3. Sintered glass filters 4. Sintered metal filters 5. Membrane filters

Description : Discuss in brief about gaseous sterilization.

Last Answer : Gaseous sterilization using Ethylene oxide: Ethylene oxide: It is colourless gas at room temperature. It can be liquefied easily and boil at 10.80C. It is highly ... contamination & penetrability of material . Others gases used are formaldehyde and Beta-propiolactone.

Description : Write the disadvantages of formaldehyde gas when used for sterilization.

Last Answer : i. Weak penetration power. ii. Difficult to maintain high conc. iii. Require high humidity for effectiveness. iv. Readily inactivated. v. Irritant to respiratory tract. vi. Difficult to remove adsorbed gas. 

Description : Write the stages involved in sterilization of surgical dressing. 

Last Answer : Stages of sterilisation are: 1) Pack or wrap the unsterilized surgical dressing into a suitable device/perforated container or any packaging material i.e parchment paper. 2) Load this container ... the sterilizer. 5) Containers are labelled with date of sterilization to prevent overload storage.

Description : Define sterilization. Classify different methods used for sterilization.

Last Answer : Sterilization: It is the process of complete destruction of microorganisms present in the system Different methods of Sterilization : I. Physical methods 1. Dry heat sterilization 2. Moist heat ... filters 3. Sintered glass filters 4. Sintered metal filters 5. Membrane filters

Description : All the following terms apply to microbial killing except: a. Sterilization. b. Microbicidal. c. Bactericidal. d. Fungistatic.

Last Answer : d. Fungistatic

Description : The most important reason for using a combination of chemotherapeutic agents in the treatment of tuberculosis is: A. To prevent development of resistance to the drugs B. To obtain bactericidal effect C. To broaden the spectrum of activity D. To reduce adverse effects of the drugs

Last Answer : A. To prevent development of resistance to the drugs

Description : Give Significance of drying.

Last Answer : 1) In pharmaceutical industry it is used as a unit process in the manufacture of granules which can be dispensed in bulk or converted into tablets or capsules. 2) Drying can also be used to ... of product, when powder is dried it gets solubilised fast. 7) Drying ensures free flowing of powders.

Description : Define emulsion and list the different emulsifying agents

Last Answer : Definition: Emulsions are biphasic liquid preparation consisting of two immiscible liquid phasesone of which is dispersed as minute globules into other phase that is continuous phase and made miscible by ... monoesters, Milk of magnesia, Mg oxide, Mg trioxide, Carbowax, cholesterol and lecithin.

Description : Describe the method of distillation for immiscible solution.

Last Answer : Method of separation of two immiscible liquids. The apparatus consists of steam generator,still,condenser,and receiver. In steam distillation process, a current of steam is passed through a immiscible ... be collected in Florentine receiver for separation of oil & water. Diagram:

Description : Give the method of preparation of “Small pox vaccine” using egg.

Last Answer : Small pox vaccine is prepared by two methods 1) By using animals 2) By using Eggs By using eggs:   Hen egg is used (Which is incubated after 12 days) ↓ Small cut on ... ↓ Material is ground to produce homogenized suspension. ↓ Transfer to suitable sterile container and freeze dried

Description : Define the term vaccine. Discuss the method of preparation of small pox vaccine using animals

Last Answer : Definition:   Vaccines are antigenic preparations which stimulate antibody formation and producing immunity. Small pox vaccine is prepared by two methods 1) By using animals 2) By using Eggs ... Filling sealing and storage: filled in final container under aseptic condition and freeze drying. 

Description : Give any two applications of simple distillation.Describe method of separation of two immiscible liquids.

Last Answer : Applications of simple distillation(0.5 2) 1) Preparation of distilled water and water for injection. 2)Recovery of alcohol in preparation of dry extracts 3)Many volatile oils and ... proportion The distillate can be collected in Florentine receiver for separation of oil & water.

Description : Explain any one method for preparation of small pox vaccine.

Last Answer : Small pox vaccine is prepared by two methods : By using animals and by using Eggs 1) By using animals: Animal: calves or Sheep. Selection of animal: healthy, non-diseased, animal ... to produce homogenized suspension. ↓ Transfer to suitable sterile container and freeze dried

Description : Explain the method of hot percolation process with well labelled diagram and write its limitations.

Last Answer : Diagram: Procedure :  1) The menstrum is placed in a round bottom flask. 2) The drug to be extracted is packed in a filter paper and placed in the body ... is unsuitable for drugs having thermolabile active constituents such as enzymes, alkaloids, anthraquinone derivatives, esters, etc.

Description : How many tablets ,each containing 8.75 grains of mercuric chloride will be required to make one pint of 0.2% solution?

Last Answer : 4.375 gr. in 1 fl ounce = 1% w/v solution 4.375 gr X 0.2 = 0.875 gr required to get 1 fl.oz 0.2% 0.875 gr x 20 = 17.5 gr required to get 20 fl.oz 0.2 % 17.5 gr/8.75 gr = 2 tablets

Description : How many tablets, each containing 8.75 grains of mercuric chloride will be required to make one quart of 0.05% solution?

Last Answer : 4.375 gr. in 1 fl ounce = 1% w/v solution 4.375 gr X 0.05 = 0.2187 gr required to get 1 fl.oz 0.05% 0.2187 gr x 40 = 8.748 gr≈ 8.75 grain required to get 40 fl.oz 0.05 % 8.75 gr/8.75 gr = 1 tablets Therefore, one tablet is required to prepare one quart of 0.05% solution.

Description : Draw a well labelled diagram of aerosol container and state method of aerosol packaging. 

Last Answer : Diagram of aerosol container : Depending on the nature of the product concentrate the aerosol can be filed by cold filling or pressure filling process  1) Cold-filling fill process:- ... air present in the container must be expelled before filing the contents in to the aerosol container.

Description : What are the different mechanisms involved in the method of size reduction.

Last Answer : Cutting. Compression. Impact Attrition Combined impact and attrition 

Description : Discuss in brief about moist granulation method.

Last Answer : Drug + Excipients → Blending → Formation of cohesive mass → Screening → Drying → Screening → Blending → Compression. This method consists of the following steps:  1. Milling of drugs ... 8) lubricating agent , glidant and disintegrating agent added/mixed. 8) Granules ready for compression

Description : What are different types of vaccines? Write method of preparation of small pox vaccine.

Last Answer : There are 4 main types of vaccines: Live-attenuated vaccines Inactivated vaccines Subunit, recombinant, polysaccharide, and conjugate vaccines Toxoid vaccines Small pox vaccine ... to produce homogenized suspension. ↓ Transfer to suitable sterile container and freeze dried

Description : Describe the method of preparation of BCG vaccine with dose, storage and uses.

Last Answer : Method of preparation of BCG vaccine: It is freeze- dried preparation containing live culture of the bacillus Calmette and Guerin strain of Mycobacterium tuberculosis.  Preparation: The ... after its preparation. Uses: Immunising agent which provides protection against tuberculosis. 

Description : Explain principle of freeze drying. Give its advantages.

Last Answer : Principle:  i. The material is frozen in a suitable container connected to a high vacuum system, so that the vapour pressure of water is reduced to less than that of material being dried. ii. ... it is properly sealed in an inert atmosphere. vii. The sterility of the product can be maintained. 

Description : Explain the working of ball mill with a well labeled diagram and give any two advantages

Last Answer : Working:   The drug to be ground is put into the cylinder of the mill and is rotated. The speed of the rotation is very different. At low speed, the mass of balls will slide or roll over each other ... for batch as well as continuous grinding vi)can be used for dry as well as wet grinding.

Description : List the precautions to be taken while using hot air oven.

Last Answer : 1. Glass apparatus and equipment should be wrapped individually. 2. Articles should be placed in such away that they should not interfere with air flow 3. Once in operation oven should not be open ... substance should never be sterilized in hot air oven. 6. It should never be over loaded.

Description : Mention precautions to be taken while using of eye drop. 

Last Answer : Do not touch the tip of the dropper. Never rinse the dropper. Never use eye drop that have changed colour. After instillation of drop, do not close eyes tightly or blink more than usual. Discard the content after one month of use.  

Description : Give application of simple distillation. What is the principle of fractional distillation?

Last Answer : Applications of simple distillation:  i. It is used for the preparation of distilled water and water for injection. ii. Preparation of many volatile oils and aromatic water. iii. Purification ... becomes richer with the liquid having the lower boiling point which gets condensed in a condenser. 

Description : Draw a well labelled diagram of aerosol container and give its advantages and disadvantages.

Last Answer : Diagram of aerosol container Advantages:   1. Medicament can be delivered directly to affected areas. 2. Absence of air prevents oxidation. 3. Hydrolysis of medicament prevented ... on injured skin. 4. Difficulties occurred during formulation when drug not soluble in propellants.

Description : Define pharmaceutical container. Give qualities of an ideal container.

Last Answer : Definition: Pharmaceutical container  A device that holds the drug and it may or may not be in direct contact with the pharmaceutical dosage form or preparations. Qualities of an ideal container:  1 ... and temperature. 7. Labelled easily 8. Non-toxic. 9. Closure easily removable/replaceable.

Description : Give the principle and working of Fluidised bed dryer.

Last Answer : Principle: In FBD, good contact between hot air and particles to be dried is obtained which cause rapid drying. Working of Fluidised bed dryer: Two types of FBD are used in pharmaceutical industry. There are ... ranging from 5 kg to 200 kg with an average drying time of about 20-40 min.

Description : Give principal and working of silverson homogenizer with labelled diagram.

Last Answer : Principal:   These work on the principal of braking large globules in to small globules by passing them under pressure through a narrow orifice. Working:   The emulsified head is placed in the vessel ... blades. So a fine emulsion is produced which is then expelled out. Diagram :

Description : Define drying. Give application of drying in pharmacy.

Last Answer : Definition:  Drying: It is defined as final removal of liquid from solid by vaporization with aid of heat. Application:  1) In pharmaceutical industry it is used as a unit process in the ... of product, when powder is dried it gets solublised fast. 7) Drying ensures free flowing of powders.

Description : Draw a well labelled diagram of filter candle. Give its working and disadvantages.

Last Answer : Diagram : Working  : The filter candle is placed in a vessel containing the liquid to be filtered. When vacuum is applied, the pressure inside the candle is decreased. Due to ... Disadvantages   1. Chance of clogging/blocking. 2. Traces of material may come in the solution.

Description : Give steps involved in moist granulation.

Last Answer : Steps: i. Moisten of Medicament with excipients with granulating agent. ii. Sieving of moist mass through sieve number 8 or 10. iii. Drying of wet granules in hot air oven at ... sieve number 20 to collect granules of uniform size v. Lubrication of sifted granules with lubricating agent

Description : Give principle and working of “Fluid Energy mill”

Last Answer : Principle:  It works on the principle of combined impact and attrition. Working   1. The material which is to be size reduced is fed in the grinding chamber from the bottom through the feed ... -treated to reduce the particle size to the order of 100# and then passed through fluid energy mill

Description : Give the principle, working and application of” Fractional distillation.

Last Answer : Principle of fractional distillation:  It differs from simple distillation in that Partial condensation of vapour is allowed to occur in a fractionating column through which the vapour must pass before reaching ... , such as alcohol & water, acetone & water, Chloroform & Benzene.

Description : Give merits and demerits of rubber as a material for closure.

Last Answer : Merits of rubber:  1) Soft in nature. 2) It is quite elastic therefore self sealing property 3) It withstands in the temperature & pressure of an autoclave therefore can be sterilised. ... agents, pigments, may get extracted into the product 4) Process cost is very high.

Description : Define aerosol. Classify aerosol. Give formula of aerosol with example. 

Last Answer : Definition: Aerosol   Aerosols may be defined as disperse phase system in which very fine solid particles or liquid droplet get dispersed in the gases which act as continuous phase. These are ... in the formulation. 7) The propellant, medicament, additives are filled into an aerosol container.

Description : Give any four precautions to be taken during aseptic work.

Last Answer : i. Self hygiene: avoid coughing, sneezing.  ii. Avoid contamination of products.  iii. Cover the whole body by Wear complete body suit up to foot.  iv. Wear hand gloves.  v. Allow minimum persons to work in aseptic area.  vi. Don’t touch unnecessarily.

Description : What do you mean by enteric coated tablet? Give reasons for enteric coating.

Last Answer : Enteric Coated tablet:   1. These tablets are coated with the material which does not disintegrate in stomach but passes through as it is i.e. enteric polymer e.g.: Hydroxypropyl methyl cellulose phthalate ... stomach pH. 4. Drug absorption is better in intestine. 5. Delayed action is needed. 

Description : Give application of freeze drying.

Last Answer : (i) The process is mainly used for drying of biological products such as antibiotics, blood products, vaccines ,enzymes preparation, microbiological cultures etc. (ii) The heat sensitive material can be dried

Description : Define Pharmacopoeia. Give example.

Last Answer : Pharmacopoeia: Pharmakon means a drug and poein means to make . Pharmacopoeia is defined as a compressive book which is issued under the authority of government and contains a list of drugs and formulae used ... to which they must confirm. Example: I.P., B.P., USP, European Pharmacopoeia, etc. 

Description : Give in brief the history of the ‘Pharmacopoeia of India’.

Last Answer : The government of India directed the Drugs Technical Advisory Board to list the drugs that are used in India, which are not mentioned in British Pharmacopoeia and also recommend the standards to be ... products. The first edition of Pharmacopoeia of India was compiled and then published in 1955.