A microscope (from the Ancient Greek: μικρός, mikrós, "small" and σκοπεῖν, skopeîn, "to look" or "see") is an instrument used to see objects that are too small to be seen by the naked eye. Microscopy is the science of investigating small objects and structures using such an instrument. Microscopic means invisible to the eye unless aided by a microscope to know more visit our website www.jaincoexport.com
These slide provide the information about history of microscopy and scientists whose contribute in the growth of microscopy
microscopy Microscopy is the technical field of using microscopes to view objects and areas of objects that cannot be seen with the naked eye (objects that are not within the resolution range of the normal eye).
A microscope is an instrument used to see objects that are too small to be seen by the naked eye.
A microscope (from the Ancient Greek: μικρός, mikrós, "small" and σκοπεῖν, skopeîn, "to look" or "see") is an instrument used to see objects that are too small to be seen by the naked eye. Microscopy is the science of investigating small objects and structures using such an instrument. Microscopic means invisible to the eye unless aided by a microscope to know more visit our website www.jaincoexport.com
These slide provide the information about history of microscopy and scientists whose contribute in the growth of microscopy
microscopy Microscopy is the technical field of using microscopes to view objects and areas of objects that cannot be seen with the naked eye (objects that are not within the resolution range of the normal eye).
A microscope is an instrument used to see objects that are too small to be seen by the naked eye.
Description
This infographic presents the theories that have been formulated about the structure of the atom. Each theory is accompanied with a basic description and a comparison is sought between them.
Objectives
After the completion of this lesson, students will be able to:
- Understand the differences between the pre-quantum and quantum theories.
- Understand the experimental data that led to the progress of the theories.
- Describe the structural components of matter as well as their properties.
Activities
1. Democritus’ theory: Students have to think about how small matter can get, to understand the meaning of the word ‘atomos’ and to understand that this specific theory was impossible to prove.
2. Dalton’s theory: Students have to discuss the reason that Dalton is considered as the father of the atomic theory despite the fact that Democritus had the original idea.
3. Thomson’s theory: The teacher introduces the discovery of electrons and challenges students to consider the structure of plum pudding in order to explain the specific theory.
4. Rutherford’s model: The teacher asks students to enlarge the atom to the size of football court in order to understand that the nucleus will be the size of a ping-pong ball. The students watch the animated video of Rutherford’s model.
5. Bohr’s model: Students have to observe images of the last two models and discuss the similarities and differences. Students have to explore the structure of different atoms through the simulation link.
6. Quantum Mechanical model: The teacher asks students to observe specific images with different meanings in order to introduce the double nature of an electron. Students have to understand that electrons exist as ‘probability clouds.’
Erasmus+ Project: Educational Infographics For STEAM
https://steam-edu.eu
Description
This infographic presents the theories that have been formulated about the structure of the atom. Each theory is accompanied with a basic description and a comparison is sought between them.
Objectives
After the completion of this lesson, students will be able to:
- Understand the differences between the pre-quantum and quantum theories.
- Understand the experimental data that led to the progress of the theories.
- Describe the structural components of matter as well as their properties.
Activities
1. Democritus’ theory: Students have to think about how small matter can get, to understand the meaning of the word ‘atomos’ and to understand that this specific theory was impossible to prove.
2. Dalton’s theory: Students have to discuss the reason that Dalton is considered as the father of the atomic theory despite the fact that Democritus had the original idea.
3. Thomson’s theory: The teacher introduces the discovery of electrons and challenges students to consider the structure of plum pudding in order to explain the specific theory.
4. Rutherford’s model: The teacher asks students to enlarge the atom to the size of football court in order to understand that the nucleus will be the size of a ping-pong ball. The students watch the animated video of Rutherford’s model.
5. Bohr’s model: Students have to observe images of the last two models and discuss the similarities and differences. Students have to explore the structure of different atoms through the simulation link.
6. Quantum Mechanical model: The teacher asks students to observe specific images with different meanings in order to introduce the double nature of an electron. Students have to understand that electrons exist as ‘probability clouds.’
Erasmus+ Project: Educational Infographics For STEAM
https://steam-edu.eu
This is part of the PowerPoint that covers section 1.1 in the Cambridge Pre-U Biology course. The full PowerPoint covers the following topics: Microscopy, cell membrane structure, transport across membranes, cell organelles.
A. The development of the has allowed us to study cells and their pro.pdfthangarajarivukadal
A. The development of the has allowed us to study cells and their processes 1. T a. Resolution is
the ability ofamicroscope to show two objects as separate Magnification is how much larger an
object appears compared to its actual size a Light microscopes are the kind we use in lab. They
function by having visible light pass through an object, and then glass lenses enlarge the object.
b. Electron microscopes use beams of electrons. They have better resolving and magnification
capabilities that allow us to see organelles and their parts. 3. Cell Theory states that all living
things & come from other cells. This theory developed as a result of contributions of 5 people
van Leeuwenhoek- 1 microscope in the 17 century b. Robert Hooke was the first person to use
the term cell to describe the basic structure of living organisms. When observing cork he noticed
that it was full of small room like structures. These structures resembled the cells that monks
lived in thus he coined the term cell in relationship Schleiden-plants are composed ofcells to
living organisms. d Schwann-animals are composed of cells e. Virchow-cells don\'t just appear
they come from preexisting cells. B. Two major classes of cells. which is coiled in region where
the nuc leus would be if the cell had a nucleus. This group includes the archaea and bacteria have
a true nucleus which is bordered by a double membrane called the nuclear enve lop. This group
includes the protists, fungi, plants, and animals collectively known as the Eukarya.
Characteristics of eukaryot ic cells A. Cytoplasm is the space in a cell between the It contains
organelles within a fluid called B. Membrane Structure and Function 1. The serves as the border
of the cell. Its unique structure allows it to regulate what enters and exits a cell, for this reason it
is oft called the gate keeper 2. Membrane Structure pecialized lipids known as make up most of
the membrane. These structures have a or water loving head that is made of a phosphate group
and two x I N
Solution
1. Developmet of microscope enabled the study of cells. Microscopes are two types light or
compound microscope and electronic microscope.
2. In a compound light microscope the high power objective lens comes close to the specimen to
magnify the image. Transmission electron microscopy (TEM) depends on the electron beam of
short wavelength to illuminate the internal structures of microorganisms. The electron beam
penetrates into the specimen and magnifies 1nm object up to 500,000X. In scanning electron
microscopy (SEM) the specimen is coated with a thin layer of heavy metal like gold or
palladium. The narrow beam of electrons probe back and forth of the metal coated specimen.
The secondary electrons that are scattered back give the image of the specimen which is
displayed on the screen.
3. According to cell theory living things are composed of one or more cells. Anton von
Leeuwenhoek (1632-1723) is considered as “Father of Microbiology”. He was the f.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
2. • Zacharias Janssen - made 1st compound
microscope
• a Dutch maker of reading glasses (late 1500’s)
3. Robert Hooke
• (18 July 1635 – 3 March 1703)
• Philosopher, architect and
physicist
• played an important role in the
scientific revolution through both
experimental and theoretical work
• known for his law of elasticity
• applying the word “cell" to describe
the basic unit of life.
5. Leeuwenhoek
• made a simple microscope (mid 1600’s)
• magnified 270X
• Early microscope lenses made images larger but
the image was not clear
6. • He is best known for his contribution to
improvement of the microscope
• and his contributions towards the
establishment of cell biology.
• he was the first to observe and
describe muscle fibres, bacteria,
spermatozoa and blood flow in
capillaries
• His microscope was used and
improved by Christiaan Huygens for
his own investigations into
microscopy.
7. Leeuwenhoek's microscope
A) a screw for adjusting the
height of the object being
examined
B) a metal plate serving as
the body
C) a skewer to impale the
object and rotate it
D) the lens itself, which
was spherical
8. van Leeuwenhoek’s microscopes were
three to five times stronger than
Hookes
allowing up to a magnification of 200
times.
enough to see one-celled animals
and even, as moving dots, bacteria.
9. • A simple microscope has
one lens
• Similar to a magnifying glass
• Magnification is the change
in apparent size produced by
a microscope
12. TOTAL MAGNIFICATION
• Powers of the eyepiece (10X) multiplied by
objective lenses determine total
magnification.
13. Resolution
the ability to tell two points
apart as separate points.
• If the resolving power of your lens is 2um
that means two points that are 2um apart
can be seen as separate points
• If they are closer together than that, they
will blend together into one point.
• The magnification is the ability to make an
object larger.
• If the resolving power of a microscope is
poor, it will just magnify a blurry object..
14.
15.
16. ELECTRON MICROSCOPES
• More powerful; some
can magnify up to
1,000,000X
• Use a magnetic field in
a vacuum to bend
beams of electrons
• Images must be
photographed or
produced electronically
17.
18.
19. Scanning Electron Microscope (SEM)
Electron microscope image of a spider
• produces realistic 3D image
• only the surface of
specimen can be observed
Electron microscope image of a fly foot
20. Transmission Electron Microscope (TEM)
• produces 2D image of
thinly sliced specimen
• detailed cell parts (only
inside a cell) can be
observed
21. CELL THEORY
1. The basic unit of life is the cell. (Hooke)
In 1665, an English scientist
named Robert Hooke
made an improved
microscope and viewed
thin slices of cork
viewing plant cell
walls
Hooke named
what he saw
"cells"
22. CELL THEORY
2. All living things are made of 1 or more cells.
• Matthias Schleiden (botanist studying
plants)
• Theodore Schwann (zoologist studying
animals) stated that all living things
were made of cells
Schleiden
Schwann
23. CELL THEORY
3. All cells divide & come from old cells. (Virchow)
Virchow
