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Phytohormones regulate many aspects of plant growth and development. Auxin, the first phytohormone isolated, directs shoot tip bending towards light and its transport within the plant mediates the light response. Cytokinins like zeatin were first found in corn and work with auxins to control bud formation depending on their concentration ratio. Gibberellins are another class of phytohormones that help coordinate plant growth.
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Plant Hormones by Dr. R.B. Kakde
Plant hormones or Plant hormones are Auxin, Cytokinin, Gibberellic acid, Abscisic acid and Ethylene. they are also called as Phytohormones or Plant Growth Regulators which play key role in various stages of plant development such as seed germination, shoot formation, root formation, stem elongation, scenescence, abscision, fruit ripining etc.
Plant hormone biosysnthesis and function amjad
This document summarizes the biosynthesis of several major plant hormones: auxins, gibberellins, cytokinins, abscisic acid, and ethylene. It describes the key discoveries in identifying each hormone, where they are produced in plants, their biosynthesis pathways, and main functions. For each hormone, it discusses the scientists who first discovered and isolated it, the tissues and organs where it is synthesized, and its role in processes like cell growth, flowering, dormancy, and stress responses.
Plant hormones
Plant hormones are naturally occurring organic substances that affect physiological processes. This presentation describes about five major groups of plant hormones, such as auxins, gibberellins, cytokinins, abscisic acid and about their biosynthesis, transport, pathways and physiological effects.
Plant hormones or growth regulators
This document provides an overview of plant hormones or phytohormones. It defines phytohormones as organic compounds synthesized in one part of the plant and translocated to another part. The document then classifies the main types of plant hormones and describes where they are produced and their key characteristics. It discusses the functions and physiological effects of the major hormone groups - auxins, gibberellins, cytokinins, abscisic acid, ethylene, and brassinosteroids. For each hormone, it covers aspects like site of production, transport, mode of action, and commercial uses.
Plant hormones and plant reproduction
The document summarizes plant signal transduction and hormone pathways. It describes 3 main steps in signal transduction - reception, transduction, and response. It then discusses 5 major plant hormones - auxin, gibberellins, cytokinins, ethylene, and abscisic acid - and their roles in processes like growth, ripening, dormancy, and responses to stimuli. It concludes with details of plant reproduction, including the roles of flowers, double fertilization in angiosperms, and formation of seeds.
Auxins
Auxins are a specific group of plant hormones that play an important role in plant growth and development. Some key points about auxins include:
- They were the first plant hormone discovered. Common auxins include indole-3-acetic acid (IAA).
- Auxins are synthesized in root tips, young leaves, and apical buds, and are involved in processes like stem elongation, root initiation, apical dominance, and fruit development.
- Their discovery was made through experiments by Charles Darwin, Peter Boysen-Jensen, and Frits Went in the late 19th/early 20th centuries which demonstrated that a signal substance moved through plants and caused differential growth.
Plant growth regulators
Plant growth regulators are chemicals that alter plant growth and development. The main plant hormones are auxins, gibberellins, cytokinins, abscisic acid, and ethylene. Auxins promote cell elongation and root growth. Gibberellins promote stem elongation and seed germination. Cytokinins promote cell division. Abscisic acid induces dormancy and leaf senescence. Ethylene promotes fruit ripening and senescence. Together these hormones precisely regulate key processes in the plant life cycle.
Plant growth regulators
Plant hormones (auxins, gibberellins, cytokinins, ethylene, abscisic acid) act as chemical messengers that control many plant growth and developmental processes. They are produced in one part of the plant and transported to other parts to initiate responses. Plant growth regulators include both natural and synthetic chemicals that influence plant growth and development when applied. The five major classes of natural plant hormones each have distinct functions such as cell elongation, dormancy, senescence and stress responses.
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Plant Hormones by Dr. R.B. Kakde
Plant hormones or Plant hormones are Auxin, Cytokinin, Gibberellic acid, Abscisic acid and Ethylene. they are also called as Phytohormones or Plant Growth Regulators which play key role in various stages of plant development such as seed germination, shoot formation, root formation, stem elongation, scenescence, abscision, fruit ripining etc.
Plant hormone biosysnthesis and function amjad
This document summarizes the biosynthesis of several major plant hormones: auxins, gibberellins, cytokinins, abscisic acid, and ethylene. It describes the key discoveries in identifying each hormone, where they are produced in plants, their biosynthesis pathways, and main functions. For each hormone, it discusses the scientists who first discovered and isolated it, the tissues and organs where it is synthesized, and its role in processes like cell growth, flowering, dormancy, and stress responses.
Plant hormones
Plant hormones are naturally occurring organic substances that affect physiological processes. This presentation describes about five major groups of plant hormones, such as auxins, gibberellins, cytokinins, abscisic acid and about their biosynthesis, transport, pathways and physiological effects.
Plant hormones or growth regulators
This document provides an overview of plant hormones or phytohormones. It defines phytohormones as organic compounds synthesized in one part of the plant and translocated to another part. The document then classifies the main types of plant hormones and describes where they are produced and their key characteristics. It discusses the functions and physiological effects of the major hormone groups - auxins, gibberellins, cytokinins, abscisic acid, ethylene, and brassinosteroids. For each hormone, it covers aspects like site of production, transport, mode of action, and commercial uses.
Plant hormones and plant reproduction
The document summarizes plant signal transduction and hormone pathways. It describes 3 main steps in signal transduction - reception, transduction, and response. It then discusses 5 major plant hormones - auxin, gibberellins, cytokinins, ethylene, and abscisic acid - and their roles in processes like growth, ripening, dormancy, and responses to stimuli. It concludes with details of plant reproduction, including the roles of flowers, double fertilization in angiosperms, and formation of seeds.
Auxins
Auxins are a specific group of plant hormones that play an important role in plant growth and development. Some key points about auxins include:
- They were the first plant hormone discovered. Common auxins include indole-3-acetic acid (IAA).
- Auxins are synthesized in root tips, young leaves, and apical buds, and are involved in processes like stem elongation, root initiation, apical dominance, and fruit development.
- Their discovery was made through experiments by Charles Darwin, Peter Boysen-Jensen, and Frits Went in the late 19th/early 20th centuries which demonstrated that a signal substance moved through plants and caused differential growth.
Plant growth regulators
Plant growth regulators are chemicals that alter plant growth and development. The main plant hormones are auxins, gibberellins, cytokinins, abscisic acid, and ethylene. Auxins promote cell elongation and root growth. Gibberellins promote stem elongation and seed germination. Cytokinins promote cell division. Abscisic acid induces dormancy and leaf senescence. Ethylene promotes fruit ripening and senescence. Together these hormones precisely regulate key processes in the plant life cycle.
Plant growth regulators
Plant hormones (auxins, gibberellins, cytokinins, ethylene, abscisic acid) act as chemical messengers that control many plant growth and developmental processes. They are produced in one part of the plant and transported to other parts to initiate responses. Plant growth regulators include both natural and synthetic chemicals that influence plant growth and development when applied. The five major classes of natural plant hormones each have distinct functions such as cell elongation, dormancy, senescence and stress responses.
Plant Growth Regulators
This document discusses several major plant hormones (phytohormones), including their functions, locations of synthesis, and some uses. It describes auxins, cytokinins, gibberellins, abscisic acid, and ethylene - noting that they regulate growth, stress responses, germination, flowering, and fruit development. Specific hormones are discussed in more detail, outlining their natural and synthetic forms as well as some of their roles and applications in agriculture.
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This document provides information on plant hormones (phytohormones). It discusses the main types of plant hormones which are auxins, gibberellins, cytokinins, ethylene, and abscisic acid. For each hormone, it describes their functions such as auxins promoting cell elongation and growth, gibberellins promoting seed germination and stem elongation, and cytokinins promoting cell division and shoot growth. It also discusses some of the key experiments that helped discover these hormones and their mechanisms of action and physiological roles in plants.
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Dr. Divya Sharma discusses plant growth regulators and their roles in plant growth and development. There are internal and external factors that influence plant growth. Hormones called phytohormones regulate many processes including flowering, stem and leaf formation, fruit ripening, and more. The major classes of plant growth regulators are auxins, cytokinins, gibberellins, ethylene, and abscisic acid. Auxins promote cell elongation and root formation while cytokinins stimulate cell division and shoot growth. Gibberellins promote stem elongation and flowering. Together these hormones precisely control plant growth and differentiation.
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This document provides a literature review on plant hormones, including their nature, occurrence, and functions. It discusses the early discovery and identification of the main plant hormone classes: auxins, cytokinins, ethylene, abscisic acid, and gibberellins. The review describes the key characteristics of plant hormones and how they were first isolated. It also examines the biosynthesis, transport, and physiological effects of each major hormone class. The overall purpose is to summarize the current understanding of plant hormones and their roles in regulating growth and development.
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The 5 main groups of plant hormones
Auxin
Cytokinins
Ethylene
Abscisic Acid
Gibberellins
Brassica rapa, a model plant species for experimentation
Design and begin group GA experiments
Hormones can have effects on the cells that produce them and, after transport, at the target cells or tissues
Hormones can have inhibitory rather than stimulatory effects
5 main groups based on chemical structure
Hormones can have effects on the cells that produce them and, after transport, at the target cells or tissues
Hormones can have inhibitory rather than stimulatory effects
5 main groups based on chemical structure
Hormones can have effects on the cells that produce them and, after transport, at the target cells or tissues
Hormones can have inhibitory rather than stimulatory effects
5 main groups based on chemical structure
Application of Plant Growth Regulators (PGR's) in Agriculture
Plant Growth regulators (PGR's) refers to natural or synthetic substances influence (promote or retard) the growth and development of plants.
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Plant hormones (also known as plant growth regulators (PGRs) and phytohormones) are chemicals that regulate a plant's growth. Plant hormones on the other hand, are not like animal hormones, they are often not transported to other parts of the plant and production is not limited to specific locations. Plants lack tissues or organs specifically for the production of hormones; unlike animals, plants lack glands that produce and secrete hormones to be moved around the body. Plant hormones shape the plant, effecting seed growth, time of flowering, the sex of flowers, its longevity, senescence of leaves and fruits, they affect which tissues grow up and which grow downward, leaf formation and stem growth, fruit development and ripening, and even plant death. Hormones are vital to plant growth and lacking them plants would be mostly a mass of undifferentiated cells.
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This document summarizes information about auxin, a plant growth regulator. It discusses that auxin is synthesized from the amino acid tryptophan, predominantly in actively dividing cells. Auxin is transported polarly in shoots and roots in an energy-dependent process, and can also be transported non-polarly in the phloem. Auxin is stored in inactive conjugated forms or degraded, and can be inactivated by oxidation or conjugation enzymes. Auxin functions include promoting cell elongation, phototropism, apical dominance, root initiation, fruit growth, and other developmental processes.
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The document discusses plant growth regulators and their role in crop improvement. It begins by introducing plant hormones and the five major classes: auxins, gibberellins, cytokinins, abscisic acid, and ethylene. It then examines each hormone in more detail, describing their discovery, functions, effects on growth, and practical applications in agriculture. Specific examples are provided such as how auxins promote cell elongation and apical dominance, gibberellins induce stem elongation and seed germination, and ethylene stimulates fruit ripening and senescence. In conclusion, plant growth regulators are important for plant growth and development and widely used to improve crop yields and quality.
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Plant hormones, also known as chemical messengers, control many plant growth and developmental processes. The five major classes of plant hormones are auxins, gibberellins, cytokinins, ethylene, and abscisic acid. Auxins promote cell elongation and influence phototropism and geotropism. Gibberellins stimulate stem growth and overcome bud and seed dormancy. Cytokinins promote cell division and interact with auxins to influence tissue differentiation. Ethylene influences fruit ripening and senescence. Abscisic acid induces dormancy and leaf and fruit abscission. Hormones are produced in one part of the plant and transported to other parts to initiate various responses and regulate
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This document discusses plant growth regulators and retardants. It provides information on the five main classes of plant hormones - auxins, gibberellins, cytokinins, ethylene, and abscisic acid. For each hormone, it describes their site of production in plants, precursor molecules, biosynthetic pathways, and roles in growth and development processes like cell elongation, flowering, seed germination, and stress responses. The document also examines the effects of some commonly used synthetic plant growth regulators and the roles of hormones like auxins and ethylene in processes like phototropism, fruit ripening, and organ abscission.
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Growth hormone
Hormones are organic compounds naturally synthesized in higher plants which influence their growth and development.
Active at a site different from their origin and works at very low concentration.
Synthetic compounds are also developed which behaves like growth regulators.
Collectively these two are known as growth regulators.
Naturally occuring auxin is indole acetic acid.
Naturally occuring cytokinin is zeatin.
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This document discusses several major plant hormones (phytohormones), including their functions, locations of synthesis, and some uses. It describes auxins, cytokinins, gibberellins, abscisic acid, and ethylene - noting that they regulate growth, stress responses, germination, flowering, and fruit development. Specific hormones are discussed in more detail, outlining their natural and synthetic forms as well as some of their roles and applications in agriculture.
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role of plant hormones
This document provides a literature review on plant hormones, including their nature, occurrence, and functions. It discusses the early discovery and identification of the main plant hormone classes: auxins, cytokinins, ethylene, abscisic acid, and gibberellins. The review describes the key characteristics of plant hormones and how they were first isolated. It also examines the biosynthesis, transport, and physiological effects of each major hormone class. The overall purpose is to summarize the current understanding of plant hormones and their roles in regulating growth and development.
plant growth regulators
The 5 main groups of plant hormones
Auxin
Cytokinins
Ethylene
Abscisic Acid
Gibberellins
Brassica rapa, a model plant species for experimentation
Design and begin group GA experiments
Hormones can have effects on the cells that produce them and, after transport, at the target cells or tissues
Hormones can have inhibitory rather than stimulatory effects
5 main groups based on chemical structure
Hormones can have effects on the cells that produce them and, after transport, at the target cells or tissues
Hormones can have inhibitory rather than stimulatory effects
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Hormones can have effects on the cells that produce them and, after transport, at the target cells or tissues
Hormones can have inhibitory rather than stimulatory effects
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Application of Plant Growth Regulators (PGR's) in Agriculture
Plant Growth regulators (PGR's) refers to natural or synthetic substances influence (promote or retard) the growth and development of plants.
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This document discusses two major plant hormones: auxins and gibberellins. It describes their sites of biosynthesis, transport within plants, and various effects on growth and differentiation. Auxins are synthesized in young leaves and seeds and transported through vascular tissues, stimulating cell enlargement and division, root initiation, tropic responses, and more. Gibberellins are also synthesized in young tissues and transported through xylem, causing stem elongation, bolting in long day plants, seed germination, and fruit development. Both auxins and gibberellins regulate numerous growth and developmental processes in plants.
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This document summarizes information about auxin, a plant growth regulator. It discusses that auxin is synthesized from the amino acid tryptophan, predominantly in actively dividing cells. Auxin is transported polarly in shoots and roots in an energy-dependent process, and can also be transported non-polarly in the phloem. Auxin is stored in inactive conjugated forms or degraded, and can be inactivated by oxidation or conjugation enzymes. Auxin functions include promoting cell elongation, phototropism, apical dominance, root initiation, fruit growth, and other developmental processes.
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The document discusses plant growth regulators and their role in crop improvement. It begins by introducing plant hormones and the five major classes: auxins, gibberellins, cytokinins, abscisic acid, and ethylene. It then examines each hormone in more detail, describing their discovery, functions, effects on growth, and practical applications in agriculture. Specific examples are provided such as how auxins promote cell elongation and apical dominance, gibberellins induce stem elongation and seed germination, and ethylene stimulates fruit ripening and senescence. In conclusion, plant growth regulators are important for plant growth and development and widely used to improve crop yields and quality.
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Plant hormones, also known as chemical messengers, control many plant growth and developmental processes. The five major classes of plant hormones are auxins, gibberellins, cytokinins, ethylene, and abscisic acid. Auxins promote cell elongation and influence phototropism and geotropism. Gibberellins stimulate stem growth and overcome bud and seed dormancy. Cytokinins promote cell division and interact with auxins to influence tissue differentiation. Ethylene influences fruit ripening and senescence. Abscisic acid induces dormancy and leaf and fruit abscission. Hormones are produced in one part of the plant and transported to other parts to initiate various responses and regulate
28 plant growth regulation
Plant growth regulators are chemical substances that control all aspects of plant growth and development. They are also known as plant growth hormones or phytohormones. There are different types of plant growth regulators that either promote or inhibit growth. The major plant growth promoters are auxins, gibberellins, and cytokinins, while the major inhibitors are abscisic acid and ethylene. Plant growth regulators were discovered through various experiments over time and play an important role in plant cell differentiation, elongation, flowering, fruit ripening, and seed dormancy.
plant growth regulators
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Seminar on pgr in plants
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Plant growth regulators ppt
This document discusses plant growth regulators and retardants. It provides information on the five main classes of plant hormones - auxins, gibberellins, cytokinins, ethylene, and abscisic acid. For each hormone, it describes their site of production in plants, precursor molecules, biosynthetic pathways, and roles in growth and development processes like cell elongation, flowering, seed germination, and stress responses. The document also examines the effects of some commonly used synthetic plant growth regulators and the roles of hormones like auxins and ethylene in processes like phototropism, fruit ripening, and organ abscission.
Plant growth hormones
Expains in detail the Plant Growth Hormones, Plant growth promoters and plant growth retardants/inhibitors. The role of Growth hormones in Physiological process of Plants and their application in Plant Tissue culture (Auxins, cytokinins, Gibberellins, ABA, Ethylene)
Growth hormone
Hormones are organic compounds naturally synthesized in higher plants which influence their growth and development.
Active at a site different from their origin and works at very low concentration.
Synthetic compounds are also developed which behaves like growth regulators.
Collectively these two are known as growth regulators.
Naturally occuring auxin is indole acetic acid.
Naturally occuring cytokinin is zeatin.
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Plant growth regulators (PGRs) were discovered in the late 19th/early 20th century and have been important in horticulture. Auxins were the first recognized phytohormone and indole-3-acetic acid (IAA) is the most active auxin. Gibberellins were isolated in the 1930s from fungi and are involved in stem elongation and flowering. Cytokinins were discovered in the 1950s and promote cell division. Over 500 compounds have properties of growth regulators and important classes include abscisic acid, ethylene, brassinosteroids, jasmonates, polyamines, and salicylic acid.
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Cytokinin
Cytokinins are a class of plant growth hormones that promote cell division. They were first discovered in 1955 from degraded herring sperm DNA. There are two main types: adenine-type cytokinins like kinetin and zeatin, and phenylurea-type cytokinins. Cytokinins play many important physiological roles in plants including cell division, cell elongation, differentiation, delaying senescence, and influencing flowering. They are widely used in tissue culture and to increase the shelf life of cut flowers and vegetables.
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Charles Darwin was among the first to identify auxin while studying plant growth. Auxins are plant hormones that promote growth and were the first hormones discovered. They occur naturally as indole-3-acetic acid (IAA) and can also be produced synthetically. Auxin is transported from the shoot tip to other parts of the plant where it promotes growth and inhibits root growth. It controls many developmental processes like phototropism, apical dominance, root initiation, flowering and fruit development.
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Animatronics refers to using robotic devices to emulate humans, animals, or bring lifelike characteristics to inanimate objects. It has applications in film special effects and theme parks. Walt Disney pioneered the use of sophisticated animatronics called audio-animatronics in Disney theme parks starting in the 1950s. The design process for animatronics involves sculpting, mold making, fabrication, costuming, and programming to bring characters to life with realistic motion and appearance.
Lifi powerpoint presentation
Light Fidelity (Li-Fi) is a wireless communication technology similar to Wi-Fi that uses visible light communication through LED light bulbs to transmit data. It provides transmission speeds faster than Wi-Fi and can be used in places where Wi-Fi signals cannot reach, such as underwater, in hospitals where Wi-Fi penetration is not safe, and anywhere there is a light source. Potential applications of Li-Fi include updating traffic information instantly, revealing underwater impurities, fast data transfer between devices, locating individuals, and indoor navigation systems.
IMMUNITY AND THE IMMUNE SYSTEM
The document discusses immunity and the immune system. It defines immunity as the natural or acquired resistance of an individual to pathogens. The immune system is a complex system that distinguishes self from non-self and provides defense against infectious agents. Immunology is the study of the immune system and immune responses. The immune system includes innate immunity, which provides a natural defense, and acquired immunity, which develops from exposure to pathogens. Key components of the immune system are antigens, antibodies, B lymphocytes, T lymphocytes, and lymphoid organs that help the immune system function.
Pros and cons of Science and technology
This document discusses the development of science and technology in India during the post-independence period through the vision of Pandit Jawaharlal Nehru. Nehru, as Prime Minister, consciously developed science and technology as a major force for accelerating social and economic change, as expressed in his book 'Discovery of India'. Key Indian scientists that contributed during this period include Sir J. C. Bose, C. V. Raman, S. N. Bose, Dr. Homi J. Bhabha, Vikram Sarabhai, and Dr. Har Govind Singh Khorana.
More from Gurwinderkaur45 (7)
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HUMAN EYE By-R.M Class 10 phy best digital notes.pdf
Class 10 human eye notes physics
Handwritten best quality
11.1 Role of physical biological in deterioration of grains.pdf
Storagedeteriorationisanyformoflossinquantityandqualityofbio-materials.
Themajorcausesofdeteriorationinstorage
•Physical
•Biological
•Mechanical
•Chemical
Storageonlypreservesquality.Itneverimprovesquality.
Itisadvisabletostartstoragewithqualityfoodproduct.Productwithinitialpoorqualityquicklydepreciates
Summary Of transcription and Translation.pdf
Hello Everyone Here We are Sharing You with The process of protien Synthesis in very short points you will be Able to understand It Very well
Describing and Interpreting an Immersive Learning Case with the Immersion Cub...
Current descriptions of immersive learning cases are often difficult or impossible to compare. This is due to a myriad of different options on what details to include, which aspects are relevant, and on the descriptive approaches employed. Also, these aspects often combine very specific details with more general guidelines or indicate intents and rationales without clarifying their implementation. In this paper we provide a method to describe immersive learning cases that is structured to enable comparisons, yet flexible enough to allow researchers and practitioners to decide which aspects to include. This method leverages a taxonomy that classifies educational aspects at three levels (uses, practices, and strategies) and then utilizes two frameworks, the Immersive Learning Brain and the Immersion Cube, to enable a structured description and interpretation of immersive learning cases. The method is then demonstrated on a published immersive learning case on training for wind turbine maintenance using virtual reality. Applying the method results in a structured artifact, the Immersive Learning Case Sheet, that tags the case with its proximal uses, practices, and strategies, and refines the free text case description to ensure that matching details are included. This contribution is thus a case description method in support of future comparative research of immersive learning cases. We then discuss how the resulting description and interpretation can be leveraged to change immersion learning cases, by enriching them (considering low-effort changes or additions) or innovating (exploring more challenging avenues of transformation). The method holds significant promise to support better-grounded research in immersive learning.
Randomised Optimisation Algorithms in DAPHNE
Slides from talk:
Aleš Zamuda: Randomised Optimisation Algorithms in DAPHNE .
Austrian-Slovenian HPC Meeting 2024 – ASHPC24, Seeblickhotel Grundlsee in Austria, 10–13 June 2024
https://ashpc.eu/
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...Scintica Instrumentation
Targeting Hsp90 and its pathogen Orthologs with Tethered Inhibitors as a Diagnostic and Therapeutic Strategy for cancer and infectious diseases with Dr. Timothy Haystead.Alternate Wetting and Drying - Climate Smart Agriculture
Alternate Wetting and Drying - Climate Smart AgricultureInternational Food Policy Research Institute- South Asia Office
PPT on Alternate Wetting and Drying presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024. SDSS1335+0728: The awakening of a ∼ 106M⊙ black hole⋆
Context. The early-type galaxy SDSS J133519.91+072807.4 (hereafter SDSS1335+0728), which had exhibited no prior optical variations during the preceding two decades, began showing significant nuclear variability in the Zwicky Transient Facility (ZTF) alert stream from December 2019 (as ZTF19acnskyy). This variability behaviour, coupled with the host-galaxy properties, suggests that SDSS1335+0728 hosts a ∼ 106M⊙ black hole (BH) that is currently in the process of ‘turning on’. Aims. We present a multi-wavelength photometric analysis and spectroscopic follow-up performed with the aim of better understanding the origin of the nuclear variations detected in SDSS1335+0728. Methods. We used archival photometry (from WISE, 2MASS, SDSS, GALEX, eROSITA) and spectroscopic data (from SDSS and LAMOST) to study the state of SDSS1335+0728 prior to December 2019, and new observations from Swift, SOAR/Goodman, VLT/X-shooter, and Keck/LRIS taken after its turn-on to characterise its current state. We analysed the variability of SDSS1335+0728 in the X-ray/UV/optical/mid-infrared range, modelled its spectral energy distribution prior to and after December 2019, and studied the evolution of its UV/optical spectra. Results. From our multi-wavelength photometric analysis, we find that: (a) since 2021, the UV flux (from Swift/UVOT observations) is four times brighter than the flux reported by GALEX in 2004; (b) since June 2022, the mid-infrared flux has risen more than two times, and the W1−W2 WISE colour has become redder; and (c) since February 2024, the source has begun showing X-ray emission. From our spectroscopic follow-up, we see that (i) the narrow emission line ratios are now consistent with a more energetic ionising continuum; (ii) broad emission lines are not detected; and (iii) the [OIII] line increased its flux ∼ 3.6 years after the first ZTF alert, which implies a relatively compact narrow-line-emitting region. Conclusions. We conclude that the variations observed in SDSS1335+0728 could be either explained by a ∼ 106M⊙ AGN that is just turning on or by an exotic tidal disruption event (TDE). If the former is true, SDSS1335+0728 is one of the strongest cases of an AGNobserved in the process of activating. If the latter were found to be the case, it would correspond to the longest and faintest TDE ever observed (or another class of still unknown nuclear transient). Future observations of SDSS1335+0728 are crucial to further understand its behaviour. Key words. galaxies: active– accretion, accretion discs– galaxies: individual: SDSS J133519.91+072807.4
Farming systems analysis: what have we learnt?.pptx
Presentation given at the official farewell of Prof Ken Gillet at Wageningen on 13 June 2024
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学校原件一模一样【微信：741003700 】《(UAM毕业证书)马德里自治大学毕业证学位证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
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8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary S...
Wereport the study of a huge optical intraday flare on 2021 November 12 at 2 a.m. UT in the blazar OJ287. In the binary black hole model, it is associated with an impact of the secondary black hole on the accretion disk of the primary. Our multifrequency observing campaign was set up to search for such a signature of the impact based on a prediction made 8 yr earlier. The first I-band results of the flare have already been reported by Kishore et al. (2024). Here we combine these data with our monitoring in the R-band. There is a big change in the R–I spectral index by 1.0 ±0.1 between the normal background and the flare, suggesting a new component of radiation. The polarization variation during the rise of the flare suggests the same. The limits on the source size place it most reasonably in the jet of the secondary BH. We then ask why we have not seen this phenomenon before. We show that OJ287 was never before observed with sufficient sensitivity on the night when the flare should have happened according to the binary model. We also study the probability that this flare is just an oversized example of intraday variability using the Krakow data set of intense monitoring between 2015 and 2023. We find that the occurrence of a flare of this size and rapidity is unlikely. In machine-readable Tables 1 and 2, we give the full orbit-linked historical light curve of OJ287 as well as the dense monitoring sample of Krakow.
Sustainable Land Management - Climate Smart Agriculture
Sustainable Land Management - Climate Smart AgricultureInternational Food Policy Research Institute- South Asia Office
PPT on Sustainable Land Management presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024.
fermented food science of sauerkraut.pptx
This ppt contains the production of a fermented food name - sauerkraut
JAMES WEBB STUDY THE MASSIVE BLACK HOLE SEEDS
The pathway(s) to seeding the massive black holes (MBHs) that exist at the heart of galaxies in the present and distant Universe remains an unsolved problem. Here we categorise, describe and quantitatively discuss the formation pathways of both light and heavy seeds. We emphasise that the most recent computational models suggest that rather than a bimodal-like mass spectrum between light and heavy seeds with light at one end and heavy at the other that instead a continuum exists. Light seeds being more ubiquitous and the heavier seeds becoming less and less abundant due the rarer environmental conditions required for their formation. We therefore examine the different mechanisms that give rise to different seed mass spectrums. We show how and why the mechanisms that produce the heaviest seeds are also among the rarest events in the Universe and are hence extremely unlikely to be the seeds for the vast majority of the MBH population. We quantify, within the limits of the current large uncertainties in the seeding processes, the expected number densities of the seed mass spectrum. We argue that light seeds must be at least 103 to 105 times more numerous than heavy seeds to explain the MBH population as a whole. Based on our current understanding of the seed population this makes heavy seeds (Mseed > 103 M⊙) a significantly more likely pathway given that heavy seeds have an abundance pattern than is close to and likely in excess of 10−4 compared to light seeds. Finally, we examine the current state-of-the-art in numerical calculations and recent observations and plot a path forward for near-future advances in both domains.
Gadgets for management of stored product pests_Dr.UPR.pdf
Insectsplayamajorroleinthedeteriorationoffoodgrainscausingbothquantitativeandqualitativelosses
Wellprovedthatnogranariescanbefilledwithgrainswithoutinsectsastheharvestedproducecontainegg(or)larvae(or)pupae(or)adultinsectinthembecauseoffieldcarryoverinfestationwhichcannotbeavoidedindevelopingcountrieslikeIndia
Simpletechnologiesfortimelydetectionofinsectsinthestoredproduceandtherebyplantimelycontrolmeasures
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HUMAN EYE By-R.M Class 10 phy best digital notes.pdf
HUMAN EYE By-R.M Class 10 phy best digital notes.pdf
11.1 Role of physical biological in deterioration of grains.pdf
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Describing and Interpreting an Immersive Learning Case with the Immersion Cub...
Describing and Interpreting an Immersive Learning Case with the Immersion Cub...
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...
Alternate Wetting and Drying - Climate Smart Agriculture
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SDSS1335+0728: The awakening of a ∼ 106M⊙ black hole⋆
SDSS1335+0728: The awakening of a ∼ 106M⊙ black hole⋆
Farming systems analysis: what have we learnt?.pptx
Farming systems analysis: what have we learnt?.pptx
Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary S...
Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary S...
Sustainable Land Management - Climate Smart Agriculture
Sustainable Land Management - Climate Smart Agriculture
GBSN - Biochemistry (Unit 6) Chemistry of Proteins
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Clinical periodontology and implant dentistry 2003.pdf
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plant hormones powerpoint presentation
- 3. ****The term 'Phytohormone' was coined by Thimann in 1948.****
- 10. The auxin indole-3-acetic acid
- 11. Under normal conditions, shoot tips bend towards the light. Without light on the tip, no bending When not at tip, collar doesn’t prevent bending Conclusion: Light is sensed at the tip, but response not at tip.New hypothesis: A substance or chemical is transported. Auxin later isolated from shoot tips and established to be involved in cell elongation
- 14. The cytokinin zeatin, the name is derived from Zea, in which it was first discovered in immature kernels.
- 16. Hormones can work with each other to regulate various aspects of plant biology. Here, auxin and cytokinin work together in regulating lateral bud formation… the sprouting of lateral buds depends on the ratio of cytokinin to auxin…
- 20. GibberellinA1