1. The document describes the process of photosynthesis, including the light-dependent and light-independent reactions that take place in the chloroplasts of plant cells.
2. The light-dependent reactions use energy from sunlight to convert water to oxygen and produce ATP and NADPH using the electron transport chain located in the thylakoid membranes.
3. The light-independent Calvin cycle then uses the ATP and NADPH products to fix carbon dioxide and produce glucose and other carbohydrates in the chloroplast stroma.
Photosynthesis is a oxidation reduction process in which water is oxidized and carbon dioxide is reduced to carbohydrate level, the water and oxygen being by product.
انرژی روی زمین توسط خورشید تأمین می شود. گیاهان و ارگانیسمهای خاص از طریق فرآیندی که فتوسنتز نامیده میشود، انرژی خورشید را توسط اندامکهای سلولی ویژهای به نام کلروپلاست به مولکول های آلی تبدیل می کنند. در این فصل ، من در مورد این روند به طور مفصل صحبت خواهم کرد.
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Life on earth is powered by sun. Plants and specific organisms convert the energy of the sun by specialized cellular organelles called chloroplasts into organic molecules through a process which is called photosynthesis. In this chapter, I will talk about this process in details.
Photosynthesis is a oxidation reduction process in which water is oxidized and carbon dioxide is reduced to carbohydrate level, the water and oxygen being by product.
انرژی روی زمین توسط خورشید تأمین می شود. گیاهان و ارگانیسمهای خاص از طریق فرآیندی که فتوسنتز نامیده میشود، انرژی خورشید را توسط اندامکهای سلولی ویژهای به نام کلروپلاست به مولکول های آلی تبدیل می کنند. در این فصل ، من در مورد این روند به طور مفصل صحبت خواهم کرد.
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Life on earth is powered by sun. Plants and specific organisms convert the energy of the sun by specialized cellular organelles called chloroplasts into organic molecules through a process which is called photosynthesis. In this chapter, I will talk about this process in details.
9 - Metabolism and Transfering Energy - Part TwoAhmad V.Kashani
سلولهای زنده برای انجام بسیاری از وظایف خود به انتقال انرژی از منابع خارجی نیاز دارند. همه ارگانیسمها باید از طریق فتوسنتز و تنفس سلولی این انرژی را از مولکول های آلی موجود درغذا بدست آورند. تنفس با استفاده از اکسیژن و تولید ATP، باعث شکستن این سوخت میشود. مواد زائد این نوع تنفس، دی اکسید کربن و آب، مواد اولیه فتوسنتز هستند. در این اسلاید، من سعی می کنم چگونگی برداشت سلولها از انرژی ذخیره شده در مولکولهای آلی و استفاده از آن برای تولید ATP از طریق تنفس سلولی را توضیح دهم.
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Living cells require transfusions of energy from outside sources to perform their many tasks. All organism need to obtain this energy from organic molecules of food through photosynthesis and cellular respiration. Respiration breaks this fuel down, using oxygen and generating ATP. The waste products of this type of respiration, carbon dioxide and water, are the raw materials for photosynthesis. In this slide, I try to explain how cells harvest this energy stored in organic molecules and used it to generate ATP through cellular respiration.
Photosynthesis is a major process which all should know. For this only this ppt has been made to understand the basics as well as more about it . It will help all students in their project submission. Hope find well.
-LALIT KUMAR
this presentation describes light phase of photosynthesis. it explains Evidences for two phases, Photosynthetic unit & Harvesting of light energy, Emerson effect &two photosystem, Hill reaction & Photolysis /photo-oxidation of water, Redox potential & mechanism of light reaction, Cyclic photophosphorylation, Non- cyclic photophosphorylation .
In this ppt, you will learn about photosystem first of photosynthesis, with video and animation such a nice presentation. electron movement by animation, see and understand the system.
9 - Metabolism and Transfering Energy - Part TwoAhmad V.Kashani
سلولهای زنده برای انجام بسیاری از وظایف خود به انتقال انرژی از منابع خارجی نیاز دارند. همه ارگانیسمها باید از طریق فتوسنتز و تنفس سلولی این انرژی را از مولکول های آلی موجود درغذا بدست آورند. تنفس با استفاده از اکسیژن و تولید ATP، باعث شکستن این سوخت میشود. مواد زائد این نوع تنفس، دی اکسید کربن و آب، مواد اولیه فتوسنتز هستند. در این اسلاید، من سعی می کنم چگونگی برداشت سلولها از انرژی ذخیره شده در مولکولهای آلی و استفاده از آن برای تولید ATP از طریق تنفس سلولی را توضیح دهم.
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Living cells require transfusions of energy from outside sources to perform their many tasks. All organism need to obtain this energy from organic molecules of food through photosynthesis and cellular respiration. Respiration breaks this fuel down, using oxygen and generating ATP. The waste products of this type of respiration, carbon dioxide and water, are the raw materials for photosynthesis. In this slide, I try to explain how cells harvest this energy stored in organic molecules and used it to generate ATP through cellular respiration.
Photosynthesis is a major process which all should know. For this only this ppt has been made to understand the basics as well as more about it . It will help all students in their project submission. Hope find well.
-LALIT KUMAR
this presentation describes light phase of photosynthesis. it explains Evidences for two phases, Photosynthetic unit & Harvesting of light energy, Emerson effect &two photosystem, Hill reaction & Photolysis /photo-oxidation of water, Redox potential & mechanism of light reaction, Cyclic photophosphorylation, Non- cyclic photophosphorylation .
In this ppt, you will learn about photosystem first of photosynthesis, with video and animation such a nice presentation. electron movement by animation, see and understand the system.
Photosynthesis is a very crucial process in nature and I have cleared a lot of basics concepts in this presentation. Any student in grade 11 or 12 (medical sc/biology/biotech) or a college student from science field will be able to clear his/her concepts through this ppt.
Plz do follow my Instagram page @biologistindia
Photosynthesis is a process used by plants and other organisms to convert light energy, normally from the sun, into chemical energy that can be used to fuel the organisms' activities. Carbohydrates, such as sugars, are synthesized from carbon dioxide and water.
This slideshow explains the details about Photosynthesis process. It has covered all the aspects such as definition, significance, photosystems, Hill reaction, Calvin cycle, HSK cycle, CAM pathway, Photorespiration, etc. of photosynthesis. This slide show will be useful to College students and the students who are appearing for various competitive examinations. .This slide show is equally beneficial to the students who want to pursue career in the biological sciences.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
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.
Comparing Evolved Extractive Text Summary Scores of Bidirectional Encoder Rep...University of Maribor
Slides from:
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Track: Artificial Intelligence
https://www.etran.rs/2024/en/home-english/
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.
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...Ana Luísa Pinho
Functional Magnetic Resonance Imaging (fMRI) provides means to characterize brain activations in response to behavior. However, cognitive neuroscience has been limited to group-level effects referring to the performance of specific tasks. To obtain the functional profile of elementary cognitive mechanisms, the combination of brain responses to many tasks is required. Yet, to date, both structural atlases and parcellation-based activations do not fully account for cognitive function and still present several limitations. Further, they do not adapt overall to individual characteristics. In this talk, I will give an account of deep-behavioral phenotyping strategies, namely data-driven methods in large task-fMRI datasets, to optimize functional brain-data collection and improve inference of effects-of-interest related to mental processes. Key to this approach is the employment of fast multi-functional paradigms rich on features that can be well parametrized and, consequently, facilitate the creation of psycho-physiological constructs to be modelled with imaging data. Particular emphasis will be given to music stimuli when studying high-order cognitive mechanisms, due to their ecological nature and quality to enable complex behavior compounded by discrete entities. I will also discuss how deep-behavioral phenotyping and individualized models applied to neuroimaging data can better account for the subject-specific organization of domain-general cognitive systems in the human brain. Finally, the accumulation of functional brain signatures brings the possibility to clarify relationships among tasks and create a univocal link between brain systems and mental functions through: (1) the development of ontologies proposing an organization of cognitive processes; and (2) brain-network taxonomies describing functional specialization. To this end, tools to improve commensurability in cognitive science are necessary, such as public repositories, ontology-based platforms and automated meta-analysis tools. I will thus discuss some brain-atlasing resources currently under development, and their applicability in cognitive as well as clinical neuroscience.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
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A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
7. 7
Structure of the ChloroplastStructure of the Chloroplast
• Double membraneDouble membrane organelleorganelle
• Outer membraneOuter membrane smoothsmooth
• Inner membraneInner membrane forms stacks offorms stacks of
connected sacs calledconnected sacs called thylakoidsthylakoids
• Thylakoid stack is called theThylakoid stack is called the
granumgranum (grana-plural)(grana-plural)
• Gel-like material around granaGel-like material around grana
calledcalled stromastroma
9. 9
Thylakoid membranesThylakoid membranes
• Light DependentLight Dependent reactions occurreactions occur
herehere
• Photosystems are made up ofPhotosystems are made up of
clusters of chlorophyll moleculesclusters of chlorophyll molecules
• Photosystems arePhotosystems are embedded inembedded in
the thylakoid membranesthe thylakoid membranes
• The two photosystems are:The two photosystems are:
– Photosytem IPhotosytem I
– Photosystem IIPhotosystem II
10. 10
Function of the StromaFunction of the Stroma
• Light IndependentLight Independent reactionsreactions
occur hereoccur here
• ATP usedATP used to maketo make
carbohydrates likecarbohydrates like glucoseglucose
• Location of theLocation of the Calvin CycleCalvin Cycle
12. 12
Energy CarriersEnergy Carriers
• Nicotinamide Adenine DinucleotideNicotinamide Adenine Dinucleotide
PhosphatePhosphate (NADP(NADP++
))
• Picks UpPicks Up 2 high-energy2 high-energy
electrons and Helectrons and H++
from the Lightfrom the Light
Reaction to form NADPHReaction to form NADPH
• NADPHNADPH carries energy to becarries energy to be
passed on to another moleculepassed on to another molecule
14. 14
• Occurs across theOccurs across the thylakoidthylakoid
membranesmembranes
• Uses light energyUses light energy
• ProduceProduce OxygenOxygen from waterfrom water
• ConvertConvert ADP to ATPADP to ATP
• Also convertAlso convert NADPNADP++
intointo
the energy carrierthe energy carrier
NADPHNADPH
Light Dependent ReactionsLight Dependent Reactions
17. 17
Photosystem IPhotosystem I
•DiscoveredDiscovered FirstFirst
•Active in the final stage of theActive in the final stage of the
Light Dependent ReactionLight Dependent Reaction
•Made of 300 molecules ofMade of 300 molecules of
ChlorophyllChlorophyll
•Almost completely chlorophyll aAlmost completely chlorophyll a
18. 18
Photosystem IIPhotosystem II
•DiscoveredDiscovered SecondSecond
•Active in the beginning stage OfActive in the beginning stage Of
the Light Dependent Reactionthe Light Dependent Reaction
•Contains aboutContains about equal amounts ofequal amounts of
chlorophyll a and chlorophyll bchlorophyll a and chlorophyll b
19. 19
Photosynthesis BeginsPhotosynthesis Begins
PhotosystemPhotosystem II absorbs lightII absorbs light
energyenergy
Electrons are energizedElectrons are energized and passedand passed
to theto the Electron Transport ChainElectron Transport Chain
Lost electrons are replaced fromLost electrons are replaced from
the splitting of waterthe splitting of water into 2Hinto 2H+,+,
free electrons, and Oxygenfree electrons, and Oxygen
2H2H++
pumped across thylakoidpumped across thylakoid
membranemembrane
20. 20
Photosystem IPhotosystem I
High-energy electronsHigh-energy electrons areare
moved to Photosystem Imoved to Photosystem I
through the Electronthrough the Electron
Transport ChainTransport Chain
Energy is used toEnergy is used to transport Htransport H++
from stroma to innerfrom stroma to inner
thylakoid membranethylakoid membrane
NADP+ converted to NADPHNADP+ converted to NADPH
when it picks up 2 electrons &when it picks up 2 electrons &
H+H+
21. 21
PhosphorylationPhosphorylation
Enzyme in thylakoidEnzyme in thylakoid
membrane calledmembrane called ATPATP
SynthetaseSynthetase
As H+ ions passed throughAs H+ ions passed through
thylakoid membrane,thylakoid membrane,
enzyme binds them to ADPenzyme binds them to ADP
FormsForms ATPATP for cellularfor cellular
23. 23
Light Reaction SummaryLight Reaction Summary
Reactants:Reactants:
• HH22OO
• Light EnergyLight Energy
Energy Products:Energy Products:
• ATPATP
• NADPHNADPH
Other Product:Other Product:
• OxygenOxygen
24. 24
Light Independent ReactionLight Independent Reaction
• ATP & NADPHATP & NADPH from lightfrom light
reactions used as energyreactions used as energy
• AtmosphericAtmospheric C0C022 is usedis used toto makemake
sugarssugars like glucose and fructoselike glucose and fructose
• Six-carbon Sugars made duringSix-carbon Sugars made during
thethe Calvin CycleCalvin Cycle
• Occurs in theOccurs in the stromastroma
26. 26
The Calvin CycleThe Calvin Cycle
• Two turnsTwo turns of the Calvin Cycle areof the Calvin Cycle are
required to make one molecule ofrequired to make one molecule of
glucoseglucose
• 3-CO3-CO22 molecules enter the cycle tomolecules enter the cycle to
form severalform several intermediate compoundsintermediate compounds
(PGA)(PGA)
• A 3-carbon molecule calledA 3-carbon molecule called RibuloseRibulose
BiphosphateBiphosphate (RuBP) is used to(RuBP) is used to
regenerate the Calvin cycleregenerate the Calvin cycle
28. 28
Factors Affecting the RateFactors Affecting the Rate
of Photosynthesisof Photosynthesis
• Amount ofAmount of
available wateravailable water
• TemperatureTemperature
• Amount ofAmount of
available lightavailable light
energyenergy