This document defines key optical terms like object distance, image distance, and magnification. It describes the differences between real and virtual images and discusses different types of mirrors and lenses. Flat mirrors form virtual, upright images the same size as the object. Concave mirrors can form real or virtual images, depending on the object distance, as described by the mirror equation. Convex mirrors always form smaller, virtual images behind the mirror. Ray diagrams can be used to determine an image's position and size.
Presentation on Various ideologies and concepts of Light.
Assessment for class X students for 2nd term.
With highly elaborated information on Light and it's properties.
100% Most Accurate Presentation on Light chapter Class X CBSE..
With Transitions and animations..
ppt of light- physics chapter class 7 . reflection and refraction also included. Anjali Kumari - dps bokaro. ppt by my physics teacher- Md. Obaidullah Ansari.
Presentation on Various ideologies and concepts of Light.
Assessment for class X students for 2nd term.
With highly elaborated information on Light and it's properties.
100% Most Accurate Presentation on Light chapter Class X CBSE..
With Transitions and animations..
ppt of light- physics chapter class 7 . reflection and refraction also included. Anjali Kumari - dps bokaro. ppt by my physics teacher- Md. Obaidullah Ansari.
Most of the times this study confused me...so, i just put some important points in one place to easily keep them in mind..hope it will help other students as well..and inform me, if a reader find anything new to improve it further.
Basavarajeeyam is a Sreshta Sangraha grantha (Compiled book ), written by Neelkanta kotturu Basavaraja Virachita. It contains 25 Prakaranas, First 24 Chapters related to Rogas& 25th to Rasadravyas.
Most of the times this study confused me...so, i just put some important points in one place to easily keep them in mind..hope it will help other students as well..and inform me, if a reader find anything new to improve it further.
Basavarajeeyam is a Sreshta Sangraha grantha (Compiled book ), written by Neelkanta kotturu Basavaraja Virachita. It contains 25 Prakaranas, First 24 Chapters related to Rogas& 25th to Rasadravyas.
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Basavarajeeyam is an important text for ayurvedic physician belonging to andhra pradehs. It is a popular compendium in various parts of our country as well as in andhra pradesh. The content of the text was presented in sanskrit and telugu language (Bilingual). One of the most famous book in ayurvedic pharmaceutics and therapeutics. This book contains 25 chapters called as prakaranas. Many rasaoushadis were explained, pioneer of dhatu druti, nadi pareeksha, mutra pareeksha etc. Belongs to the period of 15-16 century. New diseases like upadamsha, phiranga rogas are explained.
Rasamanikya is a excellent preparation in the field of Rasashastra, it is used in various Kushtha Roga, Shwasa, Vicharchika, Bhagandara, Vatarakta, and Phiranga Roga. In this article Preparation& Comparative analytical profile for both Formulationon i.e Rasamanikya prepared by Kushmanda swarasa & Churnodhaka Shodita Haratala. The study aims to provide insights into the comparative efficacy and analytical aspects of these formulations for enhanced therapeutic outcomes.
Integrating Ayurveda into Parkinson’s Management: A Holistic ApproachAyurveda ForAll
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- Video recording of this lecture in English language: https://youtu.be/kqbnxVAZs-0
- Video recording of this lecture in Arabic language: https://youtu.be/SINlygW1Mpc
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Muktapishti is a traditional Ayurvedic preparation made from Shoditha Mukta (Purified Pearl), is believed to help regulate thyroid function and reduce symptoms of hyperthyroidism due to its cooling and balancing properties. Clinical evidence on its efficacy remains limited, necessitating further research to validate its therapeutic benefits.
ABDOMINAL TRAUMA in pediatrics part one.drhasanrajab
Abdominal trauma in pediatrics refers to injuries or damage to the abdominal organs in children. It can occur due to various causes such as falls, motor vehicle accidents, sports-related injuries, and physical abuse. Children are more vulnerable to abdominal trauma due to their unique anatomical and physiological characteristics. Signs and symptoms include abdominal pain, tenderness, distension, vomiting, and signs of shock. Diagnosis involves physical examination, imaging studies, and laboratory tests. Management depends on the severity and may involve conservative treatment or surgical intervention. Prevention is crucial in reducing the incidence of abdominal trauma in children.
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
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2. Mirrors and Lenses: Definitions
The object distance (denoted by p) is the distance from the object to the mirror or lens
The image distance (denoted by q) is the distance from the image to the mirror or lens
Images are formed at the point where rays actually intersect or appear to originate
The lateral magnification (denoted by M) of the mirror or lens is the ratio of the image
height to the object height
3. Types of Images for Mirrors and Lenses
A real image is one in which light actually passes through the image point
Real images can be displayed on screens
A virtual image is one in which the light does not pass through the image point
The light appears to diverge from that point
Virtual images cannot be displayed on screens
To find where an image is formed, it is always necessary to follow at least two rays of light as they reflect from
the mirror
4. Flat Mirror
Simplest possible mirror
Properties of the image can be determined by
geometry
One ray starts at P, follows path PQ and
reflects back on itself
A second ray follows path PR and reflects
according to the Law of Reflection
The image is as far behind the mirror as the
object is in front p
q
5. Flat Mirror
The image height is the same as the object
height
The image is unmagnified
The image is virtual
The image is upright
It has the same orientation as the object
There is an apparent left-right reversal in the
image
h
h
' 1
M
p
q
6.
A spherical mirror has the shape of a segment of a sphere
A concave spherical mirror has the silvered surface of the mirror on the
inner, or concave, side of the curve
A convex spherical mirror has the silvered surface of the mirror on the
outer, or convex, side of the curve
7. Concave Mirrors
The mirror has a radius of
curvature of R
Its center of curvature is the point
C
Point V is the center of the
spherical segment
A line drawn from C to V is called
the principal axis of the mirror
8. Image Formed by a Concave Mirror
•
Geometry can be used to determine the magnification of the image
•
h’ is negative when the image is inverted with respect to the object
'
h q
M
h p
•
Geometry shows the
relationship between
the image and object
distances
•
This is called the mirror
equation
1 1 2
p q R
9. Image Formed by a Concave Mirror
'
h q
M
h p
1 1 2
p q R
p
h
tan
q
h'
R
p
h
tan
q
R
h
'
R
p
q
R
h
h
'
p
q
10. Focal Length
If an object is very far away, then p = and 1/p = 0
Incoming rays are essentially parallel
In this special case, the image point is called the
focal point
The distance from the mirror to the focal point (f) is
called the focal length
The focal point is dependent solely on the curvature
of the mirror, not by the location of the object
11. Convex Mirrors
•
A convex mirror is sometimes called a diverging mirror
•
The rays from any point on the object diverge after reflection as
though they were coming from some point behind the mirror
•
The image is virtual because it lies behind the mirror at the point
where the reflected rays appear to originate
•
In general, the image formed by a convex mirror is upright,
virtual, and smaller than the object
13. Ray Diagrams
Ray diagrams can be used to determine the position and size of an image
They are graphical constructions which tell the overall nature of the
image
They can be used to check the parameters calculated from the mirror and
magnification equations
To make the ray diagram, one needs to know the position of the object
and the position of the center of curvature
Three rays are drawn; they all start from the same position on the object
14. Ray Diagrams
The intersection of any two of the rays at a point locates the image
The third ray serves as a check of the construction
Ray 1 is drawn parallel to the principal axis and is reflected back through
the focal point, F
Ray 2 is drawn through the focal point and is reflected parallel to the
principal axis
Ray 3 is drawn through the center of curvature and is reflected back on
itself