The document discusses intermolecular forces, which are the attractions between molecules. It describes the different types of intermolecular forces including dipole-dipole interactions, hydrogen bonding, and London dispersion forces. It explains how these intermolecular forces influence various physical properties of substances like boiling point, viscosity, surface tension, and phase changes. The document also discusses how intermolecular forces relate to states of matter and phase diagrams.
This power point work describe about polar and nonn polar compounds and how to find it very easily and it also explain dipole moment and its calculation...this includes some workout problems
This is a powerpoint presentation that discusses or talks about the topic: Kinetic Molecular Theory of Gases, a key principle of Chemistry. This also includes the definition, concept and some variables used in Kinetic Molecular Theory of Gases.
This power point work describe about polar and nonn polar compounds and how to find it very easily and it also explain dipole moment and its calculation...this includes some workout problems
This is a powerpoint presentation that discusses or talks about the topic: Kinetic Molecular Theory of Gases, a key principle of Chemistry. This also includes the definition, concept and some variables used in Kinetic Molecular Theory of Gases.
The Kinetic Molecular Model and Intermolecular Forces of Attraction in Matter is one of the important topic in Grade 12, General Chemistry 2 subject. In here, it includes topics that discusses theory of solids and liquids, the different intermolecular and intramolecular forces such as covalent and ionic bonds, dipole- dipole, hydrogen bonds, london dispersion,
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
The increased availability of biomedical data, particularly in the public domain, offers the opportunity to better understand human health and to develop effective therapeutics for a wide range of unmet medical needs. However, data scientists remain stymied by the fact that data remain hard to find and to productively reuse because data and their metadata i) are wholly inaccessible, ii) are in non-standard or incompatible representations, iii) do not conform to community standards, and iv) have unclear or highly restricted terms and conditions that preclude legitimate reuse. These limitations require a rethink on data can be made machine and AI-ready - the key motivation behind the FAIR Guiding Principles. Concurrently, while recent efforts have explored the use of deep learning to fuse disparate data into predictive models for a wide range of biomedical applications, these models often fail even when the correct answer is already known, and fail to explain individual predictions in terms that data scientists can appreciate. These limitations suggest that new methods to produce practical artificial intelligence are still needed.
In this talk, I will discuss our work in (1) building an integrative knowledge infrastructure to prepare FAIR and "AI-ready" data and services along with (2) neurosymbolic AI methods to improve the quality of predictions and to generate plausible explanations. Attention is given to standards, platforms, and methods to wrangle knowledge into simple, but effective semantic and latent representations, and to make these available into standards-compliant and discoverable interfaces that can be used in model building, validation, and explanation. Our work, and those of others in the field, creates a baseline for building trustworthy and easy to deploy AI models in biomedicine.
Bio
Dr. Michel Dumontier is the Distinguished Professor of Data Science at Maastricht University, founder and executive director of the Institute of Data Science, and co-founder of the FAIR (Findable, Accessible, Interoperable and Reusable) data principles. His research explores socio-technological approaches for responsible discovery science, which includes collaborative multi-modal knowledge graphs, privacy-preserving distributed data mining, and AI methods for drug discovery and personalized medicine. His work is supported through the Dutch National Research Agenda, the Netherlands Organisation for Scientific Research, Horizon Europe, the European Open Science Cloud, the US National Institutes of Health, and a Marie-Curie Innovative Training Network. He is the editor-in-chief for the journal Data Science and is internationally recognized for his contributions in bioinformatics, biomedical informatics, and semantic technologies including ontologies and linked data.
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.
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.
This pdf is about the Schizophrenia.
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Slide 1: Title Slide
Extrachromosomal Inheritance
Slide 2: Introduction to Extrachromosomal Inheritance
Definition: Extrachromosomal inheritance refers to the transmission of genetic material that is not found within the nucleus.
Key Components: Involves genes located in mitochondria, chloroplasts, and plasmids.
Slide 3: Mitochondrial Inheritance
Mitochondria: Organelles responsible for energy production.
Mitochondrial DNA (mtDNA): Circular DNA molecule found in mitochondria.
Inheritance Pattern: Maternally inherited, meaning it is passed from mothers to all their offspring.
Diseases: Examples include Leber’s hereditary optic neuropathy (LHON) and mitochondrial myopathy.
Slide 4: Chloroplast Inheritance
Chloroplasts: Organelles responsible for photosynthesis in plants.
Chloroplast DNA (cpDNA): Circular DNA molecule found in chloroplasts.
Inheritance Pattern: Often maternally inherited in most plants, but can vary in some species.
Examples: Variegation in plants, where leaf color patterns are determined by chloroplast DNA.
Slide 5: Plasmid Inheritance
Plasmids: Small, circular DNA molecules found in bacteria and some eukaryotes.
Features: Can carry antibiotic resistance genes and can be transferred between cells through processes like conjugation.
Significance: Important in biotechnology for gene cloning and genetic engineering.
Slide 6: Mechanisms of Extrachromosomal Inheritance
Non-Mendelian Patterns: Do not follow Mendel’s laws of inheritance.
Cytoplasmic Segregation: During cell division, organelles like mitochondria and chloroplasts are randomly distributed to daughter cells.
Heteroplasmy: Presence of more than one type of organellar genome within a cell, leading to variation in expression.
Slide 7: Examples of Extrachromosomal Inheritance
Four O’clock Plant (Mirabilis jalapa): Shows variegated leaves due to different cpDNA in leaf cells.
Petite Mutants in Yeast: Result from mutations in mitochondrial DNA affecting respiration.
Slide 8: Importance of Extrachromosomal Inheritance
Evolution: Provides insight into the evolution of eukaryotic cells.
Medicine: Understanding mitochondrial inheritance helps in diagnosing and treating mitochondrial diseases.
Agriculture: Chloroplast inheritance can be used in plant breeding and genetic modification.
Slide 9: Recent Research and Advances
Gene Editing: Techniques like CRISPR-Cas9 are being used to edit mitochondrial and chloroplast DNA.
Therapies: Development of mitochondrial replacement therapy (MRT) for preventing mitochondrial diseases.
Slide 10: Conclusion
Summary: Extrachromosomal inheritance involves the transmission of genetic material outside the nucleus and plays a crucial role in genetics, medicine, and biotechnology.
Future Directions: Continued research and technological advancements hold promise for new treatments and applications.
Slide 11: Questions and Discussion
Invite Audience: Open the floor for any questions or further discussion on the topic.
4. Intermolecular
Forces
The States of Matter
• The state a substance is
in at a particular
temperature and
pressure depends on
two antagonistic entities:
The kinetic energy of the
particles
The strength of the
attractions between the
particles
9. Intermolecular
Forces
Ion-Dipole Interactions
• A fourth type of force, ion-dipole interactions
are an important force in solutions of ions.
• The strength of these forces are what make it
possible for ionic substances to dissolve in
polar solvents.
10. Intermolecular
Forces
Dipole-Dipole Interactions
• Molecules that have
permanent dipoles are
attracted to each other.
The positive end of one is
attracted to the negative
end of the other and vice-
versa.
These forces are only
important when the
molecules are close to
each other.
12. Intermolecular
Forces
London Dispersion Forces
While the electrons in the 1s orbital of helium
would repel each other (and, therefore, tend
to stay far away from each other), it does
happen that they occasionally wind up on the
same side of the atom.
16. Intermolecular
Forces
London Dispersion Forces
• These forces are present in all molecules,
whether they are polar or nonpolar.
• The tendency of an electron cloud to distort in
this way is called polarizability.
17. Intermolecular
Forces
Factors Affecting London Forces
• The shape of the molecule
affects the strength of dispersion
forces: long, skinny molecules
(like n-pentane tend to have
stronger dispersion forces than
short, fat ones (like neopentane).
• This is due to the increased
surface area in n-pentane.
18. Intermolecular
Forces
Factors Affecting London Forces
• The strength of dispersion forces tends to
increase with increased molecular weight.
• Larger atoms have larger electron clouds,
which are easier to polarize.
19. Intermolecular
Forces
Which Have a Greater Effect:
Dipole-Dipole Interactions or Dispersion Forces?
• If two molecules are of comparable size
and shape, dipole-dipole interactions
will likely be the dominating force.
• If one molecule is much larger than
another, dispersion forces will likely
determine its physical properties.
20. Intermolecular
Forces
How Do We Explain This?
• The nonpolar series
(SnH4 to CH4) follow
the expected trend.
• The polar series
follows the trend
from H2Te through
H2S, but water is
quite an anomaly.
21. Intermolecular
Forces
Hydrogen Bonding
• The dipole-dipole interactions
experienced when H is bonded to
N, O, or F are unusually strong.
• We call these interactions
hydrogen bonds.
25. Intermolecular
Forces
Viscosity
• Resistance of a liquid
to flow is called
viscosity.
• It is related to the ease
with which molecules
can move past each
other.
• Viscosity increases
with stronger
intermolecular forces
and decreases with
higher temperature.
30. Intermolecular
Forces
Energy Changes Associated
with Changes of State
• The heat added to the
system at the melting and
boiling points goes into
pulling the molecules
farther apart from each
other.
• The temperature of the
substance does not rise
during the phase change.
31. Intermolecular
Forces
Vapor Pressure
• At any temperature, some molecules in a
liquid have enough energy to escape.
• As the temperature rises, the fraction of
molecules that have enough energy to
escape increases.
34. Intermolecular
Forces
Vapor Pressure
• The boiling point of a
liquid is the
temperature at which
its vapor pressure
equals atmospheric
pressure.
• The normal boiling
point is the
temperature at which
its vapor pressure is
760 torr.
36. Intermolecular
Forces
Phase Diagrams
• The AB line is the liquid-vapor interface.
• It starts at the triple point (A), the point at
which all three states are in equilibrium.
37. Intermolecular
Forces
Phase Diagrams
It ends at the critical point (B); above this
critical temperature and critical pressure the
liquid and vapor are indistinguishable from
each other.
40. Intermolecular
Forces
Phase Diagrams
• Below A the substance cannot exist in the
liquid state.
• Along the AC line the solid and gas phases
are in equilibrium; the sublimation point at
each pressure is along this line.
41. Intermolecular
Forces
Phase Diagram of Water
• Note the high critical
temperature and critical
pressure:
These are due to the
strong van der Waals
forces between water
molecules.
42. Intermolecular
Forces
Phase Diagram of Water
• The slope of the solid–
liquid line is negative.
This means that as the
pressure is increased at a
temperature just below the
melting point, water goes
from a solid to a liquid.
43. Intermolecular
Forces
Phase Diagram of Carbon Dioxide
Carbon dioxide
cannot exist in the
liquid state at
pressures below
5.11 atm; CO2
sublimes at normal
pressures.
44. Intermolecular
Forces
Phase Diagram of Carbon Dioxide
The low critical
temperature and
critical pressure for
CO2 make
supercritical CO2 a
good solvent for
extracting nonpolar
substances (such as
caffeine).
55. Intermolecular
Forces
Metallic Solids
• Metals are not
covalently bonded, but
the attractions between
atoms are too strong to
be van der Waals
forces.
• In metals, valence
electrons are
delocalized throughout
the solid.