Diphenylamine is reacted with sulfur and iodine in a fusion reaction to synthesize phenothiazine, a tricyclic compound used as an antihistamine. The procedure involves refluxing diphenylamine, sulfur, and iodine, then cooling and filtering to obtain yellow phenothiazine crystals with a melting point of 184-185°C. However, the document does not provide the results of this specific reaction, including the practical and percentage yields or melting point of the product obtained.
This slide discusses about fused heterocyclic compound Acridine..the structural analogue of anthracene with one carbon group is replaced with nitrogen atom.
Unit iii heterocyclic compounds as per PCI Syllabus of POC-IIIGanesh Mote
Nomenclature of hetero cyclic compounds, classification of heterocyclic compounds, Reactivity, aromaticity, orbital picture, stability, resonance energy, resonance structure, basicity, method of preparation, reaction and medicinal uses of Pyrrole, furan and thiophene
THIS PRESENTATION CONTAIN INTRODUCTION, STRUCTURE, PHYSICAL AND CHEMICAL PROPERTIES, SYNTHESIS AND APPLICATION OF FUSED HETEROCYCLIC COMPOUND CONTAINING ONE HETERO ATOM - QUINOLINE, ISOQUINOLINE AND INDOLE
This slide discusses about fused heterocyclic compound Acridine..the structural analogue of anthracene with one carbon group is replaced with nitrogen atom.
Unit iii heterocyclic compounds as per PCI Syllabus of POC-IIIGanesh Mote
Nomenclature of hetero cyclic compounds, classification of heterocyclic compounds, Reactivity, aromaticity, orbital picture, stability, resonance energy, resonance structure, basicity, method of preparation, reaction and medicinal uses of Pyrrole, furan and thiophene
THIS PRESENTATION CONTAIN INTRODUCTION, STRUCTURE, PHYSICAL AND CHEMICAL PROPERTIES, SYNTHESIS AND APPLICATION OF FUSED HETEROCYCLIC COMPOUND CONTAINING ONE HETERO ATOM - QUINOLINE, ISOQUINOLINE AND INDOLE
B. Pharm. (Honours) Part-IV Practical, Medicinal Chemistry-II, MANIKImran Nur Manik
2. Medicinal Chemistry-II: (Marks-30)
Synthesis of at least two important members of the following groups of drugs: sulphonamides, antimalarials, antibiotics, barbiturates. adrenergic agents, antihistamines and antineoplastic agents.
Catabolism of Phenylalanine and Tyrosine | Disorders Of Tyrosine Metabolismkiransharma204
This PPT contains topic related to Catabolism of Phenylalanine and Tyrosine, Disorders Of Tyrosine Metabolism and metabolic disorders like Phenyketonuria, Albinism, Alkaptonuria and Tyrosinemia.
Books referred: https://www.amazon.in/s?k=satyanarayan+biochemistry&i=stripbooks&crid=2UMKA76J0R8WC&sprefix=satya%2Cstripbooks%2C456&ref=nb_sb_ss_i_2_5
Synthesis of at least two important members of the following groups of drugs: sulphonamides, antimalarials, antibiotics, barbiturates. adrenergic agents, antihistamines and antineoplastic agents.
Similar to Synthesis of Phenothiazine from Diphenylamine.pptx (15)
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
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Anti ulcer drugs and their Advance pharmacology ||
Anti-ulcer drugs are medications used to prevent and treat ulcers in the stomach and upper part of the small intestine (duodenal ulcers). These ulcers are often caused by an imbalance between stomach acid and the mucosal lining, which protects the stomach lining.
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Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
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- WOMEN’S HEALTH: FERTILITY PRESERVATION
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ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
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Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
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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.
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
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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
2. Synthesis of Phenothiazine from
Diphenylamine.
Aim:
• To prepare and submit Phenothiazine from Diphenylamine.
Requirements:
• Apparatus: Round bottom flask, reflux condenser, water bath, oil bath.
• Chemicals: Diphenylamine, Iodine, Ethanol, Charcoal, Sulphur.
Theory:
• Diphenylamine when treated with Sulphur undergo fusion reaction in the presence of
iodine to give Phenothiazine a tricyclic compound used as an antihistamine
engagement.
-Pratik Terse
2
3. Synthesis of Phenothiazine from
Diphenylamine.
Diphenylamine:
• Molecular formula of Diphenylamine: C12H11N
• Molecular wt. of Diphenylamine: 169 g/mol
Phenothiazine:
• Molecular formula of Phenothiazine: C12H9NS
• Molecular wt. of Phenothiazine : 199 g/mol
-Pratik Terse
3
4. Synthesis of Phenothiazine from
Diphenylamine.
Procedure.
• In a round bottom flask fitted with reflux condenser place 6.4 grams of
Suphur, 16.8 gram Diphenylamine, and 300 mg Iodine.
• Reflux the mixture on an oil bath at 190 to 200℃ for 30 to 40 minutes.
• Cool and grind the residue mass in which 5 ml of ethanol and pinch of
animal charcoal is added and heated it until solid mass dissolves.
• Filter the solution while hot and cool in ice bath.
• Filter the reaction mixture and obtain as yellow crystals of phenothiazine.
• Melting point of the product is 184 to 185℃.
-Pratik Terse
4
5. Synthesis of Phenothiazine from
Diphenylamine.
Results:
• The practical yield was found to be _____grams and percentage yield
was _____percent and melting point was found to be ___degree Celsius.
Calculation:
Theoretical Yield:
Practical Yield:
% Practical Yield:
-Pratik Terse
5
6. • Derivatives of phenothiazine are
highly bioactive and have
widespread uses like promazine
and chlorpromazine as
antipsychotic drugs.
Uses:
-Pratik Terse
6
