This document discusses methods for large-scale water purification. It describes storage, filtration using slow sand filters and rapid sand filters, and disinfection using chlorination. Slow sand filters rely on biological processes in the schmutzdecke layer and have lower filtration rates than rapid sand filters, which use coagulation, flocculation, and sedimentation prior to mechanical filtration. Chlorination is the primary disinfection method and works by producing hypochlorous acid that kills bacteria; a free chlorine residual is important to prevent recontamination. Other disinfection options like ozonation and UV do not provide residual protection. The document reviews these purification methods and discusses related tests and regulations.
THESE SLIDES ARE PREPAREED TO UNDERSTAND about ENVIRONMENTAL HEALTH PROBLEMS IN INDIA IN EASY WAY Important links- NOTES- https://mynursingstudents.blogspot.com/ youtube channel https://www.youtube.com/c/MYSTUDENTSU... CHANEL PLAYLIST- ANATOMY AND PHYSIOLOGY-https://www.youtube.com/playlist?list=PL93S13oM2gAPM3VTGVUXIeswKJ3XGaD2p COMMUNITY HEALTH NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gAPyslPNdIJoVjiXEDTVEDzs CHILD HEALTH NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gANcslmv0DXg6BWmWN359Gvg FIRST AID- https://www.youtube.com/playlist?list=PL93S13oM2gAMvGqeqH2ZTklzFAZhOrvgP HCM- https://www.youtube.com/playlist?list=PL93S13oM2gAM7mZ1vZhQBHWbdLnLb-cH9 FUNDAMENTALS OF NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gAPFxu78NDLpGPaxEmK1fTao COMMUNICABLE DISEASES- https://www.youtube.com/playlist?list=PL93S13oM2gAOWo4IwNjLU_LCuhRN0ZLeb ENVIRONMENTAL HEALTH- https://www.youtube.com/playlist?list=PL93S13oM2gAPkI6LvfS8Zu1nm6mZi9FK6 MSN- https://www.youtube.com/playlist?list=PL93S13oM2gAOdyoHnDLAoR_o8M6ccqYBm HINDI ONLY- https://www.youtube.com/playlist?list=PL93S13oM2gAN4L-FJ3s_IEXgZCijGUA1A ENGLISH ONLY- https://www.youtube.com/playlist?list=PL93S13oM2gAMYv2a1hFcq4W1nBjTnRkHP facebook profile- https://www.facebook.com/suresh.kr.lrhs/ FACEBOOK PAGE- https://www.facebook.com/My-Student-S... facebook group NURSING NOTES- https://www.facebook.com/groups/24139... FOR MAKING EASY NOTES YOU CAN ALSO VISIT MY BLOG – BLOGGER- https://mynursingstudents.blogspot.com/ Instagram- https://www.instagram.com/mystudentsu... Twitter- https://twitter.com/student_system?s=08 #PEM, #water,#waterborne,#ICDS,#diseases,#ASSESSMENT, #APPEARENCE,#PULSE,#GRIMACE,#REFLEX,#RESPIRATION,#RESUSCITATION,#NEWBORN,#BABY,#VIRGINIA, #CHILD, #OXYGEN,#CYANOSIS,#OPTICNERVE, #SARACHNA,#MYSTUDENTSUPPORTSYSTEM, #rashes,#nursingclasses, #communityhealthnursing,#ANM, #GNM, #BSCNURING,#NURSINGSTUDENTS, #WHO,#NURSINGINSTITUTION,#COLLEGEOFNURSING,#nursingofficer,#COMMUNITYHEALTHOFFICE,#HEALTHPROBLEMS
THESE SLIDES ARE PREPAREED TO UNDERSTAND about ENVIRONMENTAL HEALTH PROBLEMS IN INDIA IN EASY WAY Important links- NOTES- https://mynursingstudents.blogspot.com/ youtube channel https://www.youtube.com/c/MYSTUDENTSU... CHANEL PLAYLIST- ANATOMY AND PHYSIOLOGY-https://www.youtube.com/playlist?list=PL93S13oM2gAPM3VTGVUXIeswKJ3XGaD2p COMMUNITY HEALTH NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gAPyslPNdIJoVjiXEDTVEDzs CHILD HEALTH NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gANcslmv0DXg6BWmWN359Gvg FIRST AID- https://www.youtube.com/playlist?list=PL93S13oM2gAMvGqeqH2ZTklzFAZhOrvgP HCM- https://www.youtube.com/playlist?list=PL93S13oM2gAM7mZ1vZhQBHWbdLnLb-cH9 FUNDAMENTALS OF NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gAPFxu78NDLpGPaxEmK1fTao COMMUNICABLE DISEASES- https://www.youtube.com/playlist?list=PL93S13oM2gAOWo4IwNjLU_LCuhRN0ZLeb ENVIRONMENTAL HEALTH- https://www.youtube.com/playlist?list=PL93S13oM2gAPkI6LvfS8Zu1nm6mZi9FK6 MSN- https://www.youtube.com/playlist?list=PL93S13oM2gAOdyoHnDLAoR_o8M6ccqYBm HINDI ONLY- https://www.youtube.com/playlist?list=PL93S13oM2gAN4L-FJ3s_IEXgZCijGUA1A ENGLISH ONLY- https://www.youtube.com/playlist?list=PL93S13oM2gAMYv2a1hFcq4W1nBjTnRkHP facebook profile- https://www.facebook.com/suresh.kr.lrhs/ FACEBOOK PAGE- https://www.facebook.com/My-Student-S... facebook group NURSING NOTES- https://www.facebook.com/groups/24139... FOR MAKING EASY NOTES YOU CAN ALSO VISIT MY BLOG – BLOGGER- https://mynursingstudents.blogspot.com/ Instagram- https://www.instagram.com/mystudentsu... Twitter- https://twitter.com/student_system?s=08 #PEM, #water,#waterborne,#ICDS,#diseases,#ASSESSMENT, #APPEARENCE,#PULSE,#GRIMACE,#REFLEX,#RESPIRATION,#RESUSCITATION,#NEWBORN,#BABY,#VIRGINIA, #CHILD, #OXYGEN,#CYANOSIS,#OPTICNERVE, #SARACHNA,#MYSTUDENTSUPPORTSYSTEM, #rashes,#nursingclasses, #communityhealthnursing,#ANM, #GNM, #BSCNURING,#NURSINGSTUDENTS, #WHO,#NURSINGINSTITUTION,#COLLEGEOFNURSING,#nursingofficer,#COMMUNITYHEALTHOFFICE,#HEALTHPROBLEMS
THESE SLIDES ARE PREPAREED TO UNDERSTAND about ENVIRONMENTAL HEALTH PROBLEMS IN INDIA IN EASY WAY Important links- NOTES- https://mynursingstudents.blogspot.com/ youtube channel https://www.youtube.com/c/MYSTUDENTSU... CHANEL PLAYLIST- ANATOMY AND PHYSIOLOGY-https://www.youtube.com/playlist?list=PL93S13oM2gAPM3VTGVUXIeswKJ3XGaD2p COMMUNITY HEALTH NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gAPyslPNdIJoVjiXEDTVEDzs CHILD HEALTH NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gANcslmv0DXg6BWmWN359Gvg FIRST AID- https://www.youtube.com/playlist?list=PL93S13oM2gAMvGqeqH2ZTklzFAZhOrvgP HCM- https://www.youtube.com/playlist?list=PL93S13oM2gAM7mZ1vZhQBHWbdLnLb-cH9 FUNDAMENTALS OF NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gAPFxu78NDLpGPaxEmK1fTao COMMUNICABLE DISEASES- https://www.youtube.com/playlist?list=PL93S13oM2gAOWo4IwNjLU_LCuhRN0ZLeb ENVIRONMENTAL HEALTH- https://www.youtube.com/playlist?list=PL93S13oM2gAPkI6LvfS8Zu1nm6mZi9FK6 MSN- https://www.youtube.com/playlist?list=PL93S13oM2gAOdyoHnDLAoR_o8M6ccqYBm HINDI ONLY- https://www.youtube.com/playlist?list=PL93S13oM2gAN4L-FJ3s_IEXgZCijGUA1A ENGLISH ONLY- https://www.youtube.com/playlist?list=PL93S13oM2gAMYv2a1hFcq4W1nBjTnRkHP facebook profile- https://www.facebook.com/suresh.kr.lrhs/ FACEBOOK PAGE- https://www.facebook.com/My-Student-S... facebook group NURSING NOTES- https://www.facebook.com/groups/24139... FOR MAKING EASY NOTES YOU CAN ALSO VISIT MY BLOG – BLOGGER- https://mynursingstudents.blogspot.com/ Instagram- https://www.instagram.com/mystudentsu... Twitter- https://twitter.com/student_system?s=08 #PEM, #water,#waterborne,#ICDS,#diseases,#ASSESSMENT, #APPEARENCE,#PULSE,#GRIMACE,#REFLEX,#RESPIRATION,#RESUSCITATION,#NEWBORN,#BABY,#VIRGINIA, #CHILD, #OXYGEN,#CYANOSIS,#OPTICNERVE, #SARACHNA,#MYSTUDENTSUPPORTSYSTEM, #rashes,#nursingclasses, #communityhealthnursing,#ANM, #GNM, #BSCNURING,#NURSINGSTUDENTS, #WHO,#NURSINGINSTITUTION,#COLLEGEOFNURSING,#nursingofficer,#COMMUNITYHEALTHOFFICE,#HEALTHPROBLEMS
THESE SLIDES ARE PREPAREED TO UNDERSTAND about ENVIRONMENTAL HEALTH PROBLEMS IN INDIA IN EASY WAY Important links- NOTES- https://mynursingstudents.blogspot.com/ youtube channel https://www.youtube.com/c/MYSTUDENTSU... CHANEL PLAYLIST- ANATOMY AND PHYSIOLOGY-https://www.youtube.com/playlist?list=PL93S13oM2gAPM3VTGVUXIeswKJ3XGaD2p COMMUNITY HEALTH NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gAPyslPNdIJoVjiXEDTVEDzs CHILD HEALTH NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gANcslmv0DXg6BWmWN359Gvg FIRST AID- https://www.youtube.com/playlist?list=PL93S13oM2gAMvGqeqH2ZTklzFAZhOrvgP HCM- https://www.youtube.com/playlist?list=PL93S13oM2gAM7mZ1vZhQBHWbdLnLb-cH9 FUNDAMENTALS OF NURSING- https://www.youtube.com/playlist?list=PL93S13oM2gAPFxu78NDLpGPaxEmK1fTao COMMUNICABLE DISEASES- https://www.youtube.com/playlist?list=PL93S13oM2gAOWo4IwNjLU_LCuhRN0ZLeb ENVIRONMENTAL HEALTH- https://www.youtube.com/playlist?list=PL93S13oM2gAPkI6LvfS8Zu1nm6mZi9FK6 MSN- https://www.youtube.com/playlist?list=PL93S13oM2gAOdyoHnDLAoR_o8M6ccqYBm HINDI ONLY- https://www.youtube.com/playlist?list=PL93S13oM2gAN4L-FJ3s_IEXgZCijGUA1A ENGLISH ONLY- https://www.youtube.com/playlist?list=PL93S13oM2gAMYv2a1hFcq4W1nBjTnRkHP facebook profile- https://www.facebook.com/suresh.kr.lrhs/ FACEBOOK PAGE- https://www.facebook.com/My-Student-S... facebook group NURSING NOTES- https://www.facebook.com/groups/24139... FOR MAKING EASY NOTES YOU CAN ALSO VISIT MY BLOG – BLOGGER- https://mynursingstudents.blogspot.com/ Instagram- https://www.instagram.com/mystudentsu... Twitter- https://twitter.com/student_system?s=08 #PEM, #water,#waterborne,#ICDS,#diseases,#ASSESSMENT, #APPEARENCE,#PULSE,#GRIMACE,#REFLEX,#RESPIRATION,#RESUSCITATION,#NEWBORN,#BABY,#VIRGINIA, #CHILD, #OXYGEN,#CYANOSIS,#OPTICNERVE, #SARACHNA,#MYSTUDENTSUPPORTSYSTEM, #rashes,#nursingclasses, #communityhealthnursing,#ANM, #GNM, #BSCNURING,#NURSINGSTUDENTS, #WHO,#NURSINGINSTITUTION,#COLLEGEOFNURSING,#nursingofficer,#COMMUNITYHEALTHOFFICE,#HEALTHPROBLEMS
The level of prevention topic will help you to know about how to prevent any particular disease in humans. Level of prevention is categorized into four
Primordial prevention
Primary prevention
Secondary prevention
Tertiary prevention
A well is a dug hole on the ground which contains water and is maintained for drinking, domestic and other purposes.
There are two (2) main types of wells, namely: shallow well and deep well.
Shallow wells are dug into soils with pickaxe and shovels and are generally not more than 15m deep. They do not penetrate the bedrock found more deeply in the ground.
Deep wells are excavated over 30m deep. They also go beyond the bedrock into the confined aquifer
The level of prevention topic will help you to know about how to prevent any particular disease in humans. Level of prevention is categorized into four
Primordial prevention
Primary prevention
Secondary prevention
Tertiary prevention
A well is a dug hole on the ground which contains water and is maintained for drinking, domestic and other purposes.
There are two (2) main types of wells, namely: shallow well and deep well.
Shallow wells are dug into soils with pickaxe and shovels and are generally not more than 15m deep. They do not penetrate the bedrock found more deeply in the ground.
Deep wells are excavated over 30m deep. They also go beyond the bedrock into the confined aquifer
Raw water should be treated to make it potable/fit for drinking. So a line of treatments should be followed to treat the water. After Coagulation and sedimentation the process of filtration and disinfection are followed.
WATER
In 1981, the 34th Word Health Assembly in a resolution emphasized that safe drinking water is a basic element for “primary health care” which is the key to the attainment of “Health for All by the year 2000 AD.”
More recently, Millennium Development Goals included safe water and sanitation in the attainable goals.
In 1990, more than 1 billion people in developing world lacked access to safe drinking water and nearly 2 billion lacked an adequate system for disposing off their excreta.
POTABLE WATER
Also called as “Safe and Wholesome Water”
Defined as water that is
Free from pathogenic agents
Free from harmful chemical substances
Pleasant to taste, i.e., free from colour and odour; and
Usable for domestic purposes
Uses of water
Domestic use
Public purposes
Industrial purposes
Agricultural purposes
Power production
Carrying away wastes
Sources of Water
Rain
Surface water
Impounding reservoirs
Rivers and streams
Tanks, ponds and lakes
Sea water
Ground water
Shallow wells
Deep wells
Springs
WATER PURIFICATION
Storage
Filtration
Chlorination
Storage
a) Physical Action
b) Chemical Action
c) Biological Action
Filtration
98 – 99% of the bacteria are removed by filtration apart from other impurities.
Two types of filters are in use
The Biologic or Slow sand filters
Rapid or Mechanical filters
1. Slow Sand or Biologic Filters
Elements:
Supernatant (raw) water
A bed of graded sand
An under drainage system
A system of filter control values
Supernatant (raw) water
Depth – 1 – 1.5 metres
A bed of graded sand
Vital layer
Slimy growth covering the surface of the sand bed
“Schmutzdecke/ Zoogleal/ Biological layer”
Consists of thread like algae, plankton, diatoms and bacteria.
It extends 2-3 cms into the top portion of the sand bed.
Formation of vital layer - “Ripening” of the filter.
It is the “Heart” of the slow sand filter.
It removes organic matter,
Holds back bacteria
Oxidizes ammonical nitrogen into nitrates and
Helps in yielding bacteria free water.
An under drainage system
Filter box – Open rectangular box of 2.5 – 4 meters deep
A system of filter control values
To maintain a constant rate of filtration
Venturi meter – measure the bed resistance or loss of head
2) Rapid/Mechanical filters
Steps involved
Coagulation
Rapid mixing
Flocculation
Sedimentation
Filtration
Filter bed:
Each unit of filter bed has surface of about 80 to 90 sq. feet
Sand is the filtering medium.
Back washing
Rapid sand filters require frequent washing either daily or weekly depending upon the loss of head.
Washing is accomplished by reversing the flow of water through sand bed which is called “Backwashing”.
Helps in dislodging the impurities and cleaning up the sand bed.
Time - 15 to 20 minutes
Chlorination:
Chlorine kills pathogenic bacteria but has no effect on spores and certain viruses except in high doses.
It oxidizes Fe, Mn and HS;
It destroys taste and odour-producing constituents
It controls algae and slime organism
This powerpoint presentation describes the concept of safe and wholesome water, daily requirements of water, sources of water supply (describing each sources in brief) but giving emphasis on sanitary well, purification of water on a large scale in brief and purification of water on small scale focusing on household level and disinfection of well. Emphasis is given on chlorination.
Components of Water Treatment Plant, Methods of Water Treatment, Process of Water Treatment such as Aeration, Sedimentation, Filtration and Disinfection etc.
In this presentation, we tried to cover all the information regarding Reverse Osmosis technology. We have discussed its different types, major parts of Reverse Osmosis i.e Activated Carbon Bed, Ion Exchange Unit, Cartridge Filter and then at the end design steps of Reverse Osmosis.
This presentation explains the slow sand filter for water treatment. These filters require large areas of land and a correspondingly large quantity of filter media (sand) and base material (gravel).
Cleaning of the filter is done by surface scrapping which may involve a lot of labor. A slow sand filter is suitable when the availability of land, labor, filter media are at a low cost.
A distinguishing property of slow sand filters is the availability of a thin layer, called the schmutzdecke, which results on the surface of the sand bed and contains a large variety of biologically active microorganisms. It is a very simple and effective technique for purifying surface water.
It will remove practically all of the turbidity from the water as well as most of the pathogens without the addition of chemicals. If turbidity of raw water is high then plain sedimentation would be required to reduce turbidity to some extent so that the fillers arc not unduly loaded.
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
1. WATER PURIFICATION ON
A LARGE SCALE
Dr. S. A. Rizwan, M.D.,
Assistant Professor
Department of Community Medicine
VMCHRI, Madurai
2. LEARNING OBJECTIVES
• Define the aim of water purification methods in public health
• List out the various methods for water purification in large scale
• Describe the steps of each method
• Describe the advantages and disadvantages of each method
3. WATER POLLUTION
• Natural
• Man made: Urbanization and industrialization
• Sources of pollution
• Sewage
• Industrial and trade waste
• Agricultural pollutants
• Physical pollutants, viz heat, radioactive substances
• Indicators of pollution
• Total suspended solids, biochemical oxygen demand (BOD) at 20
deg. C, concentration of chlorides, nitrogen and phosphorus
4. WATER RELATED DISEASES
• Biological (Water-borne diseases)
• Caused by infective agent
• Viral, Bacterial, Protozoal, Helminthic, Leptospiral
• Caused by aquatic host
• Snail, Cyclops
• Chemical
• Dental
• Cyanosis in infants
• Cardiovascular
• Inadequate use of water
• Insect breeding
5. WATER POLLUTION LAW
• Water (Prevention and Control of Pollution) Act , 1974
• Central and State Water Boards and Joint Water Boards endowed
with wide powers for controlling pollution
6. WATER PURIFICATION
• Large scale
1. Storage
2. Filtration
• Slow sand filter
• Rapid sand filter
3. Disinfection
• Chlorination
• Ozonation
• Other agents
• Membrane processes
7. WATER PURIFICATION
• Small scale
1. Household purification
• Boiling
• Chemical disinfection: Bleaching powder, Chlorine solution , High test hypochlorite
(HTH), Chlorine tablets, Iodine, Potassium permanganate
• Household filtration
2. Disinfection of well
• By adding bleaching powder
• Double pot method
9. 1. STORAGE
• In natural or artificial reservoirs
• Effects of storage:
• Physical: gravity – 90% suspended impurities settle down in one day
• Chemical: oxidizing action
• Biological: only 10% bacteria remains at the end of 1 week
• Optimum period of storage: 2 weeks
14. SLOW SAND (BIOLOGICAL) FILTERS
• Used first in 19th century in Scotland
• Elements of slow sand filter
1. Filter Box
a) Supernatant water
b) Sand bed
c) Under drainage system
2. Filter control valves
18. ELEMENTS OF SLOW SAND FILTER
• Supernatant water
• Sand bed
• Under drainage system
• Filter control valves
19. ELEMENTS OF SLOW SAND FILTER
• Supernatant water
• Depth: 1 to 1.5 m
• Promotes downward flow of water through the sand bed
• Waiting time of 3-12 hours for raw water to undergo partial
purification by sedimentation and oxidation
20. ELEMENTS OF SLOW SAND FILTER
• Sand bed
• Depth, 1 m (sand of diameter 0.2-0.3 mm), 0.3m (gravel with 0.2 - 1 cm
diameter)
• Sedimentation
• The supernatant water acts as a settling reservoir. Settle-able particles
sink to the sand surface.
• Mechanical straining
• Particles too big to pass through the gap between the sand grains are
retained
21. ELEMENTS OF SLOW SAND FILTER
• Vital/ Biological/ Zoogleal/ Schumtzdecke layer
• Slimy, gelatinous layer over sand bed containing threadlike algae,
bacteria and diatoms
• ‘Heart’ of the slow sand filter
• Ripening of filter: Formation of vital layer
• Suspended particles are retained by adhesion to the biological layer
• Removes organic matter, holds back bacteria and oxidizes ammoniacal
nitrogen in to nitrates
23. ELEMENTS OF SLOW SAND FILTER
• Under drainage system
• Depth: 0.15 m
• At the bottom of filter bed
• Porous pipes: Outlet for filtered water as well as support to the filter
media above
• Rate of filtration 0.1-0.4 m3/hr/m3
24. ELEMENTS OF SLOW SAND FILTER
• Filter control valves
• To regulate the flow of water in and out
• Filter cleaning
• Increased bed resistance -> Necessary to open the regulating valves fully
-> Scrapping top portion of sand bed up to 2 cm depth -> Time for
cleaning the filter
• After 3-4 years new filter bed is constructed
25. ADVANTAGES OF SLOW SAND FILTER
1. Simple to construct and operate
2. Construction is cheaper than rapid sand filters
3. Physical, chemical and bacteriological quality of filtered
water is very high (99.9 to 99.99 per cent and E. Coli by
99 to 99.9 per cent)
30. STEPS OF RAPID SAND FILTER
1. Coagulation
• Addition of Alum (5-40 mg/litre)
2. Rapid mixing
• Mixing chamber
• Violent mixing of alum (minutes)
31. STEPS OF RAPID SAND FILTER
3. Flocculation
• Flocculation chamber
• Slow stirring of water by paddles (30 minutes)
• Flocculent ppt. of Aluminium Hydroxide entangles all particulate,
suspended matter along with bacteria
4. Sedimentation
• Sedimentation chamber
• Flocculent ppt. settle down (removal is done from time to time)
• Clear water above goes for filtration
32. STEPS OF RAPID SAND FILTER
5. Filtration
• Filter bed
• “Effective size” of the sand particles is 0.4-0.7 mm
• Graded gravel, 30 to 40 cm
• Depth of the water on the top of the sand bed is 1.0 to 1.5 m
• Rate of filtration is 5-15 m3/m2/hr
• Remaining alum floc forms a slimy layer over sand bed, it holds back
bacteria, oxidize organic matter
• Back washing: by air bubbles or water when floc layer becomes very thick,
takes about 15 min
34. ADVANTAGES OF RAPID SAND FILTER
1. Rapid sand filter can deal with raw water directly. No preliminary
storage is needed
2. The filter beds occupy less space
3. Filtration is rapid, 40-50 times that of a slow sand filter
4. The washing of the filter is easy
5. There is more flexibility in operation
35. DIFFERENCES BETWEEN SLOW AND
RAPID FILTERS
Properties Rapid sand filter Slow sand filter
Area Little space Large area
Rate of filtration(m.g.a.d) 200 2-3
Sand size (diameter) 0.4-0.7 mm 0.2-0.3 mm
Pretreatment Coagulation & sedimentation Sedimentation
Filter cleaning Backwashing Scraping
Operation More skilled Less skilled
Removal of colour Good Better
Removal of bacteria 98-99% 99.9%-99.99%
37. 3. DISINFECTION
• Criteria for satisfactory disinfectant
• Not influenced from properties of water within short time
• Should not be toxic and colour imparting or leave the water
impotable
• Available, cheap, easy to use
• Residual concentration to deal with recontamination
• Detectable by rapid, simple techniques in small concentration
38. ACTION OF CHLORINATION
• Kills pathogenic bacteria (no effect on spores and viruses)
• Oxidize iron, manganese and hydrogen sulphide
• Reduces taste and odours
• Controls algae
• Maintains residual disinfection
40. PRINCIPLES OF CHLORINATION
1. Water should be clear, free from turbidity
2. Chlorine demand: Chlorine needed to destroy bacteria, to oxidize organic matter
and to neutralize the ammonia in water
3. Free residual chlorine for a contact period of 1 hour is essential
4. Breakpoint: Point when chlorine demand of water is met and free residual
chlorine appears
5. Breakpoint chlorination: Chlorination beyond the breakpoint . The principle of
break point chlorination is to add sufficient chlorine so that 0.5 mg/L free
residual chlorine is present in the water after one hour of contact time
6. Dose of Chlorine = Chlorine demand + Free residual chlorine
7. Minimum recommended concentration of free chlorine is 0.5 mg/L for 1hr
41. METHODS OF CHLORINATION
• Chlorine gas (Paterson's chloronome)
• Chloramine
• Perchloron or high test hypochlorite (HTH)
42. SUPER CHLORINATION
• Method of choice for highly polluted waters
• High dose of chlorine is added
• After 20 minutes of contact, dechlorination is done with
sodium sulphate/ sodium thiosulphate to reduce the
taste of excess chlorine
43. TESTS TO MEASURE RESIDUAL
CHLORINE
Orthotolidine Test
• Yellow colour
• In 10 seconds - free chlorine
• In 15 min - both free and combined chlorine
Orthotolidine Arsenite (OTA) Test
• Yellow colour
• Tests both free and combined chlorine separately
• Yellow colour due to nitrites, iron, manganese are overcome
44. OTHER DISINFECTION METHODS
• Ozone
• Used in Europe and Canada
• Strong oxidizing agent
• Strong virucidal
• No residual effect
• Should be used with chlorination
45. OTHER DISINFECTION METHODS
• UV Rays
• Used in UK
• Water should be clear
• No residual effect
• Expensive
• Chloramine
• Chlorine + Ammonia - Chloramine
• Less effective than chlorine
47. MEMBRANE PROCESSES
• High-pressure processes
• Reverse osmosis
• Rejects monovalent ions and organics of molecular weight >50 daltons
• Pore sizes <0.002 μm
• Desalination of brackish water and seawater
• Nanofiltration
• Allow monovalent ions such as sodium or potassium to pass but reject a high
proportion of divalent ions such as calcium and magnesium
• Pore sizes are typically 0.001-0.01 μm
• Effective for the removal of colour-forming organic compounds
48. MEMBRANE PROCESSES
• Low-pressure processes
• Ultrafiltration
• Reject organic molecules of molecular weight above about 800
daltons
• Pore sizes 0.002 - 0.03 μm
• Microfiltration
• Pore sizes 0.01-12 μm
• capable of sieving out particles greater than 0.05 μm
• used for water treatment in combination with coagulation
50. REVIEW 1
• All are true for Rapid Sand Filter except (All India)
a) No preliminary storage of water is required
b) Operation requires skilled workers
c) Frequent washing is not required
d) Can be gravity or pressure type
51. REVIEW 2
• All are true for Rapid Sand Filter except (All India)
a) No preliminary storage of water is required
b) Operation requires skilled workers
c) Frequent washing is not required
d) Can be gravity or pressure type
52. REVIEW 3
• Disinfection action of chlorine in water is due to (All India)
a) Hydrogen chloride
b) Hypochlorous acid
c) Hypochlorite ions
d) Hydrogen ions
53. REVIEW 4
• Which of the following have residual germicidal effect in water
disinfection? (AIIMS)
a) Chlorine only
b) Chlorine and ozone gas
c) Chlorine and UV radiation
d) Chlorine, ozone gas and UV radiation
54. REVIEW 5
• What is used to find the dose of bleaching powder required for
disinfection of water? (AIIMS)
a) Chloroscope
b) Chloronome
c) Horrock’s apparatus
d) Winchester Quart Bottle
55. REVIEW 6
• Minimum recommended of dose of free residual chlorine for routine
chlorination? (AIIMS)
a) 0.5 ppm for 1 hr
b) 0.5 ppm for 30 min
c) 1.0 ppm for 1 hr
d) 1.0 ppm for 30 min
56. REVIEW 7
• True statement regarding chlorination is (DPG)
a) Orthotoulidine test measures combined chlorine separately
b) Chlorine acts best when pH is 7
c) It kills bacteria, viruses and spores
d) Hypochlorite ions are mainly responsible for disinfection
57. REVIEW 8
• Slow sand filter is differentiated from rapid sand filter by (PGI)
a) Bacteria removed more effectively
b) Skilled person is needed
c) Cost of construction is cheaper
d) Sand particle are smaller size
e) Longer duration is needed
58. REVIEW 9
• Orthotoulidine test is done for
a) Free chlorine
b) Combined chlorine
c) Fluorine
d) Iodine
59. REVIEW 10
• Schmutzdecke refers to
a) Suspended matter in drinking water
b) Algae in drinking water
c) Alum flocculate in surface of sand filter
d) Algae, plankton, diatoms, bacteria on surface of sand filter