This is PPT was presented by Mr. Girishwar of 9th std, JNV Lepakshi, to the INOVIT-2015 organised by Vellore Institute of Technology, Vellore, Tamilnadu on 24-25th Jan 2015.
This is PPT was presented by Mr. Girishwar of 9th std, JNV Lepakshi, to the INOVIT-2015 organised by Vellore Institute of Technology, Vellore, Tamilnadu on 24-25th Jan 2015.
This presentation is about Ozone Layer and chemicals known to cause its depletion.
It also covers information about Ozone Hole and Correlation between Ozone depletion and skin diseases due to Ultra Violet light.It also contains no. of ways to limit ozone deterioration.
PHOTOCHEMICAL FORMATION OF SMOG
Photochemical Reactions in Atmosphere
What is Smog ?
Formation of Photochemical smog
Probable Mechanism for Smog formation
This presentation is about Ozone Layer and chemicals known to cause its depletion.
It also covers information about Ozone Hole and Correlation between Ozone depletion and skin diseases due to Ultra Violet light.It also contains no. of ways to limit ozone deterioration.
PHOTOCHEMICAL FORMATION OF SMOG
Photochemical Reactions in Atmosphere
What is Smog ?
Formation of Photochemical smog
Probable Mechanism for Smog formation
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
Safalta Digital marketing institute in Noida, provide complete applications that encompass a huge range of virtual advertising and marketing additives, which includes search engine optimization, virtual communication advertising, pay-per-click on marketing, content material advertising, internet analytics, and greater. These university courses are designed for students who possess a comprehensive understanding of virtual marketing strategies and attributes.Safalta Digital Marketing Institute in Noida is a first choice for young individuals or students who are looking to start their careers in the field of digital advertising. The institute gives specialized courses designed and certification.
for beginners, providing thorough training in areas such as SEO, digital communication marketing, and PPC training in Noida. After finishing the program, students receive the certifications recognised by top different universitie, setting a strong foundation for a successful career in digital marketing.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
2. Acid Rain
• NOx andSOx may either fall to the ground as
particles, aerosols or gases (dry deposition) or
else forms acid rain (wet deposition)
• The longer they remain suspended in the
air, the more likely they will be oxidised to
HNO3 and H2SO4
• Wet deposition may occur thousands of
kilometres from the pollution source
(especially now that chimney stacks may be
hundreds of metres tall)
3. Effects of Acid Rain
• Lakes
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Reduced biodiversity
Acidity may cause death of fish fry
Decreased turbidity
Growth of white moss on lake beds
Increased concentrations of dissolved metals
(including Cd2+, Cu2+, Al3+, Zn2+, Pb2+) – this
makes them bioavailable to water plants and
also allows them to enter drinking water
• Forests
– Damage to lipids and membranes leading to
plant death
– SOx interferes with photosynthesis especially in
coniferous plants
– Acidity causes conifers to shed needles too
rapidly
– Low soil pH causes damage to root hairs and
and inhibits water and nutrient uptake
4. Distribution of Acid Deposition
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It is a global rather than localised problem, since
deposition may occur thousands of kilometres
from source
There are natural sources of acidity, including
plants which acidify soils (heather and bog
moss), volcanic eruptions and the dissolution of
carbon dioxide in precipitation (carbonic acid)
There also exist natural sources of
buffering, including chalk and limestone
deposits
Conversely, granite deposits are naturally acidic
and have low buffering capacity
The areas most affected by anthropogenic acid
deposition are
Sweden, Norway, Denmark, Scotland, Germany,
The Netherlands, Austria and The East Coast of
the U.S.
This appears to be largely due to prevailing
winds and levels of rainfall
They are also areas rich in lakes and rivers with
5. Management Strategies
• Prevention
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Burn less fossil fuels
Reduce numbers of private vehicles
Increased use of public transport and bikes
Switch to low emission fuels (or electric cars?)
Remove sulphur before combustion or SOx after (scrubbing)
Burn coal with a neutralising agent (such as limestone)
Use chemicals to buffer soil and allow decomposition of
plants to offset the acidification process
– International agreements are necessary since the polluter
and the victim of the pollution may be different countries
(e.g. The Gothenburg Protocol, 1999)
6. Questions
1. Describe how acid rain is caused
2. Describe the effects of acid deposition on
living things
3. Describe and evaluate strategies to control
acid rain