It is a brief description about one of the serious problems of environment and that is Air pollution. It includes its definition, types, causes and prevention.
Air pollution: its causes,effects and pollutantsMaliha Eesha
This presentation gives the complete detail of air, air pollution, air pollutants and their types, each pollutant in detail and its causes and effects, acid rain, methods of prevention,smog,acidification,indoor pollution and so on. It is a complete package and I hope it'll be helpful in school! :)
This a presentation about the Air pollution and its causes & effects for the educational uses
It describe the definitions, types, info diagrams, sources, effects, and their controls
I hope this science could be a benefit for anyone who search the information
Environmental Pollution. Environmental Pollution is an international journal that seeks to publish papers that report results from original, novel research that addresses significant environmental pollution issues and problems and contribute new knowledge to science. The editors welcome high quality papers where the pollutants...
environmental pollution ppt
sources of environmental pollution
environmental pollution definition
environmental pollution journals
environmental pollution articles
environment pollution pdf
environmental pollution pdf
pollution articles for students
Air pollution: its causes,effects and pollutantsMaliha Eesha
This presentation gives the complete detail of air, air pollution, air pollutants and their types, each pollutant in detail and its causes and effects, acid rain, methods of prevention,smog,acidification,indoor pollution and so on. It is a complete package and I hope it'll be helpful in school! :)
This a presentation about the Air pollution and its causes & effects for the educational uses
It describe the definitions, types, info diagrams, sources, effects, and their controls
I hope this science could be a benefit for anyone who search the information
Environmental Pollution. Environmental Pollution is an international journal that seeks to publish papers that report results from original, novel research that addresses significant environmental pollution issues and problems and contribute new knowledge to science. The editors welcome high quality papers where the pollutants...
environmental pollution ppt
sources of environmental pollution
environmental pollution definition
environmental pollution journals
environmental pollution articles
environment pollution pdf
environmental pollution pdf
pollution articles for students
Effects of Air Pollution on human beings, plants and animals and Properties. Global
effects-Green house effect, Ozone depletion, heat island, dust storms, Automobile pollution sources and control, Photochemical smog, Future engines and fuels
PM is a complex mixture of air borne particles that differ in size, origin and chemical composition, all of which are <10 µm in size.
US EPA described PM pollution as ‘mixture of mixtures’.
PM is among the most harmful of all air pollutants.
Definition, Composition of atmospheric air, Classification and sources of air
pollutants. Effects of air pollution on human, plant and material, Air pollution control methods, equipment and safety.
This is the fourth slideshow in a series for Unit 4 VCE Environmental Science. It discusses the factors contributing to air pollution, the sources and sinks and the human and environmental health effects.
Smog is a kind of intense air pollution, originally named for the mixture of smoke and fog in the air. Major cities around the world are experiencing the effects of air pollution.
Effects of Air Pollution on human beings, plants and animals and Properties. Global
effects-Green house effect, Ozone depletion, heat island, dust storms, Automobile pollution sources and control, Photochemical smog, Future engines and fuels
PM is a complex mixture of air borne particles that differ in size, origin and chemical composition, all of which are <10 µm in size.
US EPA described PM pollution as ‘mixture of mixtures’.
PM is among the most harmful of all air pollutants.
Definition, Composition of atmospheric air, Classification and sources of air
pollutants. Effects of air pollution on human, plant and material, Air pollution control methods, equipment and safety.
This is the fourth slideshow in a series for Unit 4 VCE Environmental Science. It discusses the factors contributing to air pollution, the sources and sinks and the human and environmental health effects.
Smog is a kind of intense air pollution, originally named for the mixture of smoke and fog in the air. Major cities around the world are experiencing the effects of air pollution.
Air pollution is terrible for our children. Every single scientist, every single doctor will tell you the same thing: Air pollution damages our children's brains, their hearts, and their lungs.
Cancer cell metabolism: special Reference to Lactate PathwayAADYARAJPANDEY1
Normal Cell Metabolism:
Cellular respiration describes the series of steps that cells use to break down sugar and other chemicals to get the energy we need to function.
Energy is stored in the bonds of glucose and when glucose is broken down, much of that energy is released.
Cell utilize energy in the form of ATP.
The first step of respiration is called glycolysis. In a series of steps, glycolysis breaks glucose into two smaller molecules - a chemical called pyruvate. A small amount of ATP is formed during this process.
Most healthy cells continue the breakdown in a second process, called the Kreb's cycle. The Kreb's cycle allows cells to “burn” the pyruvates made in glycolysis to get more ATP.
The last step in the breakdown of glucose is called oxidative phosphorylation (Ox-Phos).
It takes place in specialized cell structures called mitochondria. This process produces a large amount of ATP. Importantly, cells need oxygen to complete oxidative phosphorylation.
If a cell completes only glycolysis, only 2 molecules of ATP are made per glucose. However, if the cell completes the entire respiration process (glycolysis - Kreb's - oxidative phosphorylation), about 36 molecules of ATP are created, giving it much more energy to use.
IN CANCER CELL:
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
introduction to WARBERG PHENOMENA:
WARBURG EFFECT Usually, cancer cells are highly glycolytic (glucose addiction) and take up more glucose than do normal cells from outside.
Otto Heinrich Warburg (; 8 October 1883 – 1 August 1970) In 1931 was awarded the Nobel Prize in Physiology for his "discovery of the nature and mode of action of the respiratory enzyme.
WARNBURG EFFECT : cancer cells under aerobic (well-oxygenated) conditions to metabolize glucose to lactate (aerobic glycolysis) is known as the Warburg effect. Warburg made the observation that tumor slices consume glucose and secrete lactate at a higher rate than normal tissues.
This pdf is about the Schizophrenia.
For more details visit on YouTube; @SELF-EXPLANATORY;
https://www.youtube.com/channel/UCAiarMZDNhe1A3Rnpr_WkzA/videos
Thanks...!
(May 29th, 2024) Advancements in Intravital Microscopy- Insights for Preclini...Scintica Instrumentation
Intravital microscopy (IVM) is a powerful tool utilized to study cellular behavior over time and space in vivo. Much of our understanding of cell biology has been accomplished using various in vitro and ex vivo methods; however, these studies do not necessarily reflect the natural dynamics of biological processes. Unlike traditional cell culture or fixed tissue imaging, IVM allows for the ultra-fast high-resolution imaging of cellular processes over time and space and were studied in its natural environment. Real-time visualization of biological processes in the context of an intact organism helps maintain physiological relevance and provide insights into the progression of disease, response to treatments or developmental processes.
In this webinar we give an overview of advanced applications of the IVM system in preclinical research. IVIM technology is a provider of all-in-one intravital microscopy systems and solutions optimized for in vivo imaging of live animal models at sub-micron resolution. The system’s unique features and user-friendly software enables researchers to probe fast dynamic biological processes such as immune cell tracking, cell-cell interaction as well as vascularization and tumor metastasis with exceptional detail. This webinar will also give an overview of IVM being utilized in drug development, offering a view into the intricate interaction between drugs/nanoparticles and tissues in vivo and allows for the evaluation of therapeutic intervention in a variety of tissues and organs. This interdisciplinary collaboration continues to drive the advancements of novel therapeutic strategies.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
insect taxonomy importance systematics and classification
Environmental air pollution
1. Presented By:
Ms. Rubina Bhati
M.Sc. II (Sem III)
Department of Biotechnology,
St. Francis De Sales College, Nagpur (M.S).
2. Introduction,
Types of pollution,
Classification of pollutants,
Air Pollution,
Types of air pollutants,
Sources of air pollution,
Effects of air pollution,
Control of air pollution,
References.
3. INTRODUCTION:
Pollution:
“Environmental pollution may be defined as the unfavourable
alterations of our surroundings wholly or largely as a byproduct of
man’s action through direct or indirect effects of change in energy
pattern, radiation levels, chemical and physical constitution and
abundance of the organisms”.
Pollutant:
“Anything, living or non-living or any physical agent (e.g. heat,
sound etc.), that in its excess makes any part of the environment
undesirable.
4. Types of Pollution:
Air pollution,
Water pollution,
Gas pollution,
Noise pollution,
Soil pollution,
Thermal pollution,
Marine pollution,
Solid waste pollution, etc.
5. Classification of Pollutants:
1. On the basis of disposal;
Pollutant
Non
degradable
Waste
Poisons
Degradable
Rapidly
degradable
Slow
degradable
6. 2. On the basis of existence in nature;
Quantitative Pollutants:- The substances which are already
present in the environment, but are termed as pollutants when
their concentration (quantity) increases in the environment.
E.g. CO2 is present in the environment in greater quantity than
normal and is hence termed as a quantitative pollutant.
Qualitative Pollutants:- The substances which are not normally
present in the environment and are added by human beings and
are pollutants by nature.
E.g. insecticides, pesticides.
7. 3. On the basis of the form in which they persist;
Primary Pollutants:- The substances which are directly emitted
from the source and remain in that form are termed as primary
pollutants.
E.g. smoke, fumes, ash, dust, nitric oxide and sulphur dioxide.
Secondary pollutants:- The substances which are formed by
chemical reaction between the primary pollutants and
constituents of the environment (i.e. those which are already
present in the environment).
E.g. smog, ozone, sulphur trioxide, nitrogen dioxide.
8. AIR POLLUTION
Air pollution occurs due to the presence of
undesirable solid or gaseous particles in the air in quantities that
are harmful to human health and the environment.
Image source: giglig.com/wp-content/uploads/2011/05/pollution.jpg
9. The substances that are responsible for causing air pollution are
called air pollutants.
Pollutants that are emitted directly from identifiable sources are
produced both by natural events (for example, dust storms and
volcanic eruptions) and human activities (emission from vehicles,
industries, etc.).
Types of air pollutants:
Air
Pollutants
Primary
pollutants
Secondary
pollutants
10. Primary Air Pollutants:
1. Sulphur dioxide (SO2):
SO2 is produced by volcanoes and in various
industrial processes. Since coal and petroleum often contain sulphur
compounds, their combustion generates sulphur dioxide. Further
oxidation of SO2, usually in the presence of a catalyst such as NO2,
forms H2SO4, and thus acid rain.
2. Nitrogen oxides (NOx):
Especially nitrogen dioxide are emitted from high
temperature combustion. It is responsible for photochemical smog,
acid rain etc.
11. 3. Carbon monoxide:
It is a colourless, odourless, non-irritating but very
poisonous gas. It is a product by incomplete combustion of fuel such as
natural gas, coal or wood. Vehicular exhaust is a major source of
carbon monoxide.
4. Carbon dioxide (CO2):
A greenhouse gas emitted from combustion but is also a
gas vital to living organisms. It is a natural gas in the atmosphere.
12. 5. Volatile organic compounds:
VOCs are an important outdoor air pollutant. In this
field they are often divided into the separate categories of methane
(CH4) and non-methane (NMVOCs).
Methane is an extremely efficient greenhouse gas which contributes to
enhanced global warming.
Other hydrocarbon VOCs are also significant greenhouse gases via
their role in creating ozone and in prolonging the life of methane in
the atmosphere, although the effect varies depending on local air
quality. Within the NMVOCs, the aromatic compounds benzene,
toluene and xylene are suspected carcinogens and may lead to
leukemia through prolonged exposure. 1, 3-butadiene is another
dangerous compound which is often associated with industrial uses.
13. 6. Particulate matter:
Particulates, alternatively referred to as particulate
matter (PM) or fine particles, are tiny particles of solid or liquid
suspended in a gas. Sources of particulate matter can be manmade or
natural.
Some particulates occur naturally, originating from volcanoes, dust
storms, forest and grassland fires, living vegetation, and sea spray.
Human activities, such as the burning of fossil fuels in vehicles, power
plants and various industrial processes also generate significant
amounts of aerosols.
Averaged over the globe, anthropogenic aerosols, currently account for
about 10 per cent of the total amount of aerosols in our atmosphere.
Increased levels of fine particles in the air are linked to health hazards
such as heart disease, altered lung function and lung cancer.
15. 7. Lead:
It is a major air pollutant that remains largely
unmonitored and is emitted by vehicles. High lead levels have been
reported in the ambient air in metropolitan cities. Leaded petrol is the
primary source of airborne lead emissions in Indian cities.
8. Ammonia (NH3):
It is emitted from agricultural processes. It is normally
encountered as a gas with a characteristic pungent odour. Ammonia
contributes significantly to the nutritional needs of terrestrial
organisms by serving as a precursor to foodstuffs and fertilizers.
Ammonia, either directly or indirectly, is also a building block for the
synthesis of many pharmaceuticals. Although in wide use, ammonia is
both caustic and hazardous.
16. Secondary Air Pollutants:
1. Particulate matter formed from gaseous primary pollutants and
compounds in photochemical smog. Smog is a kind of air pollution; the
word “smog” is a portmanteau of smoke and fog. Classic smog results
from large amounts of coal burning in an area caused by a mixture of
smoke and sulphur dioxide. Modern smog does not usually come from
coal but from vehicular and industrial emissions that are acted on in the
atmosphere by sunlight to form secondary pollutants that also combine
with the primary emissions to form photochemical smog.
17. 2. Ground level ozone (O3) formed from NOx and VOCs.
Ozone (O3) is a key constituent of the troposphere (it is also an
important constituent of certain regions of the stratosphere commonly
known as the Ozone layer). Photochemical and chemical reactions
involving it drive many of the chemical processes that occur in the
atmosphere by day and by night.
18. Sources Of Air Pollution.
Sources of air pollution refer to the various locations,
activities or factors which are responsible for the releasing of pollutants
in the atmosphere.
Sources
Air Pollution
Anthropogenic
Sources
Human activities
Natural
Sources
Natural activities
20. Anthropogenic sources:
1.“Stationary Sources” include smoke stacks of power plants,
manufacturing facilities (factories) and waste incinerators, as well as
furnaces and other types of fuel-burning heating devices.
2. “Mobile Sources” include motor vehicles, marine vessels, aircraft and
the effect of sound etc.
3. Chemicals, dust and controlled burn practices in agriculture and
forestry management. Controlled or prescribed burning is a technique
sometimes used in forest management, farming, or greenhouse gas
abatement. Fire is a natural part of both forest and grassland ecology
and controlled fire can be a tool for foresters.
21. 4. Fumes from paint, hair spray, varnish, aerosol sprays and other
solvents.
5. Waste deposition in landfills, which generate methane. Methane is
not toxic; however, it is highly flammable and may form explosive
mixtures with air. Methane is also an asphyxiate and may displace
oxygen in an enclosed space.
6. Military factors, such as nuclear weapons, toxic gases, germ
warfare and rocketry.
22. Natural sources:
1. Dust from natural sources, usually large areas of land with little or
no vegetation.
2. Methane, emitted by the digestion of food by animals, for example
cattle.
3. Radon gas from radioactive decay within the Earth’s crust. Radon is
a colourless, odourless, naturally occurring, radioactive noble gas that
is formed from the decay of radium. It is considered to be a health
hazard. Radon gas from natural sources can accumulate in buildings,
especially in confined areas such as the basement and it is the second
most frequent cause of lung cancer, after cigarette smoking.
23. 4. Smoke and carbon monoxide from wildfires.
5. Volcanic activity, which produce sulphur, chlorine, and ash
particulates.
24. Effects of Air Pollution.
Pollutant Effects
Carbon monoxide Affects the respiratory activity as Hb has more affinity for CO
than for oxygen. Thus, CO combines with Hb and thus
reduces the oxygen-carrying capacity of blood. This results in
blurred vision, headache, unconsciousness and death due to
asphyxiation.
Carbon dioxide Causes global warming.
Sulphur dioxide Respiratory problems, severe headache, reduced productivity
of plants, yellowing and reduced storage time for paper,
yellowing and damage to limestone and marble, damage to
leather, increased rate of corrosion.
Chloro-fluoro carbons
(CFCs)
Destroy ozone layer which then permits harmful UV rays to
enter the atmosphere.
25. Pollutants Effects
Nitrogen oxides Forms photochemical smog, at higher
concentrations causes leaf damage or affects the
photosynthetic activities of plants and causes
respiratory problems in mammals.
Particulate matter
(Lead halides)
Toxic effect in man.
Asbestos particles Asbestosis – a cancerous disease of the lungs.
Silicon dioxide Silicosis, a cancerous disease.
Mercury Brain and kidney damage.
26. Air pollutants affect plants by entering through stomata, destroy
chlorophyll and affect photosynthesis.
Pollutants also erode waxy coating of the leaves called cuticle.
Damage to leaf structure causes necrosis (dead areas of leaf),
chlorosis (loss or reduction of chlorophyll causing yellowing of
leaf) or epinasty (downward curling of leaf), and abscission
(dropping of leaves).
Particulates deposited on leaves can form encrustations and plug
the stomata and also reduce the availability of sunlight. The
damage can result in death of the plant.S02 causes bleaching of
leaves, chlorosis, injury and necrosis of leaves. N02 results in
increased abscission and suppressed growth. O3 causes flecks on
leaf surface, premature aging, necrosis and bleaching.
28. Control Of Air Pollution.
Particulate Control:
Mechanical collectors (dust cyclones, multi-cyclones)-
Cyclonic separation is a method of removing particulates from an air,
gas or water stream, without the use of filters, through vortex
separation. Rotational effects and gravity are used to separate
mixtures of solids and fluids.
30. Electrostatic Precipitators:
An electrostatic precipitator (ESP), or electrostatic air
cleaner is a particulate collection device that removes particles from a
flowing gas (such as air) using the force of an induced electrostatic
charge. Electrostatic precipitators are highly efficient filtration
devices that minimally impede the flow of gases through the device,
and can easily remove fine particulate matter such as dust and smoke
from the air stream.
33. Particulate Scrubber:
Scrubbers can be designed to collect particulate
matter and/or gaseous pollutants. Wet scrubbers remove dust
particles by capturing them in liquid droplets. Wet scrubbers remove
pollutant gases by dissolving or absorbing them into the liquid.
Any droplets that are in the scrubber inlet gas must be separated from
the outlet gas stream by means of another device referred to as a mist
eliminator or entrainment separator (these terms are
interchangeable). Also, the resultant scrubbing liquid must be treated
prior to any ultimate discharge or being reused in the plant.