This document discusses the plant Anthoceros. It describes Anthoceros as a genus of hornworts found in temperate and tropical regions worldwide. The document outlines the vegetative structure and reproductive processes of Anthoceros, including its gametophyte and sporophyte stages. Key details provided include that Anthoceros has a non-differentiated thallus containing chloroplasts and pyrenoids, and reproduces sexually through antheridia and archegonia forming zygotes that develop into sporophytes.
This ppt has been made by Xanthophyceae also known as yellow green algae. It occupies second position in algae classification by F.E Fritsch. It is classified into four orders. It contain xanthophyll in large amount that gives it yellow colour, hence it is commonly know as yellow green algae.
This ppt has been made by Xanthophyceae also known as yellow green algae. It occupies second position in algae classification by F.E Fritsch. It is classified into four orders. It contain xanthophyll in large amount that gives it yellow colour, hence it is commonly know as yellow green algae.
Bryology - Masters First semester revision text.pdfAleenaRose4
A reference text for Bryology - 1. General characters and systems of classifications of Bryophytes
2. General account of the anatomy, reproduction, life history and phylogeny of Sphaerocarpales, Marchantiales,
Jungermanniales, Calobryales, Anthocerotales, Sphagnales, Andreales, Funariales and Polytrichales
3. Origin and evolution of Bryophytes- gametophytic and sporophytic.
4. A general account of fossil Bryophytes and their affinities.
5. Economic importance of Bryophytes.
Order hemiptera and their generalized and specialized characteristics. Their Anatomy physiology habit habitat about food reproduction where they live. Aphids cicades hoppers with diagrams. Leaf hoppers bed bugs water bugs.
Kingdom Plantae presented by Vrushali Gharat to Mr. Kailash vilegaveKailash Vilegave
Classification Of Kingdom Plantae, Classification Of Kingdom Plantae, Economic importance Algae.
Ulothrix
Reproduction
Mosses and Liverwort
life cycle of all plants.
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
Cancer cell metabolism: special Reference to Lactate PathwayAADYARAJPANDEY1
Normal Cell Metabolism:
Cellular respiration describes the series of steps that cells use to break down sugar and other chemicals to get the energy we need to function.
Energy is stored in the bonds of glucose and when glucose is broken down, much of that energy is released.
Cell utilize energy in the form of ATP.
The first step of respiration is called glycolysis. In a series of steps, glycolysis breaks glucose into two smaller molecules - a chemical called pyruvate. A small amount of ATP is formed during this process.
Most healthy cells continue the breakdown in a second process, called the Kreb's cycle. The Kreb's cycle allows cells to “burn” the pyruvates made in glycolysis to get more ATP.
The last step in the breakdown of glucose is called oxidative phosphorylation (Ox-Phos).
It takes place in specialized cell structures called mitochondria. This process produces a large amount of ATP. Importantly, cells need oxygen to complete oxidative phosphorylation.
If a cell completes only glycolysis, only 2 molecules of ATP are made per glucose. However, if the cell completes the entire respiration process (glycolysis - Kreb's - oxidative phosphorylation), about 36 molecules of ATP are created, giving it much more energy to use.
IN CANCER CELL:
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
introduction to WARBERG PHENOMENA:
WARBURG EFFECT Usually, cancer cells are highly glycolytic (glucose addiction) and take up more glucose than do normal cells from outside.
Otto Heinrich Warburg (; 8 October 1883 – 1 August 1970) In 1931 was awarded the Nobel Prize in Physiology for his "discovery of the nature and mode of action of the respiratory enzyme.
WARNBURG EFFECT : cancer cells under aerobic (well-oxygenated) conditions to metabolize glucose to lactate (aerobic glycolysis) is known as the Warburg effect. Warburg made the observation that tumor slices consume glucose and secrete lactate at a higher rate than normal tissues.
This pdf is about the Schizophrenia.
For more details visit on YouTube; @SELF-EXPLANATORY;
https://www.youtube.com/channel/UCAiarMZDNhe1A3Rnpr_WkzA/videos
Thanks...!
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.
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.
(May 29th, 2024) Advancements in Intravital Microscopy- Insights for Preclini...Scintica Instrumentation
Intravital microscopy (IVM) is a powerful tool utilized to study cellular behavior over time and space in vivo. Much of our understanding of cell biology has been accomplished using various in vitro and ex vivo methods; however, these studies do not necessarily reflect the natural dynamics of biological processes. Unlike traditional cell culture or fixed tissue imaging, IVM allows for the ultra-fast high-resolution imaging of cellular processes over time and space and were studied in its natural environment. Real-time visualization of biological processes in the context of an intact organism helps maintain physiological relevance and provide insights into the progression of disease, response to treatments or developmental processes.
In this webinar we give an overview of advanced applications of the IVM system in preclinical research. IVIM technology is a provider of all-in-one intravital microscopy systems and solutions optimized for in vivo imaging of live animal models at sub-micron resolution. The system’s unique features and user-friendly software enables researchers to probe fast dynamic biological processes such as immune cell tracking, cell-cell interaction as well as vascularization and tumor metastasis with exceptional detail. This webinar will also give an overview of IVM being utilized in drug development, offering a view into the intricate interaction between drugs/nanoparticles and tissues in vivo and allows for the evaluation of therapeutic intervention in a variety of tissues and organs. This interdisciplinary collaboration continues to drive the advancements of novel therapeutic strategies.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
3. ≈ Cosmopolitan
≈ Mainly in temperate & tropical regions
≈ More than 200 species, 25 sp. Recorded
from India. Mostly grows in moist shady
places, sides of ditches or in moist
hollows among rocks
≈ Few species grow on decaying wood.
≈ Three common Indian species--------
≈ A. erectus, A. crispulus, A. himalayensis
Habitat & Distribution
4. It occurs in moist, shaded habitats in sub-
tropical and warm temperate regions.
The gametophyte are dorsiventral and are
often rosette-like.
On the ventral surface, many smooth
walled rhizoids are present which help in
fixation.
Scales and tuberculate rhizoids are
absent.
Some species of Anthoceros are unisexual
and others are bisexual.
The antheridia and archegonia are sunken
on the dorsal surface of the gametophyte.
Numerous sporophytes may develop on
the same gametophyte.
Vegetative Structure: External Features
5. 1) Thallus is not differentiated into
photosynthetic zone and storage
zone.
2) All cells are green and contain
chloroplasts.
3) Chloroplasts are associated with
pyrenoids which is a unique feature
of Anthocerotales.
4) There are no air chambers or pores.
5) Schizogenous cavities filled with
mucilage are present. These are often
inhabited by Nostoc (cyanobacteria),
which supply nitrogen through
nitrogen fixation to their host plants.
Vegetative Structure:
Internal Features
6. 1. Fragmentation: occurs
through progressive death
and decay of posterior
portion of thallus.
2. Tubers: develop at the end
of growing seasons. Under
unfavorable conditions, they
perennate and grow in the
next growing season.
3. Gemmae: borne on short
stalks on dorsal surface and
along margins of thalli. They
detach and germinate to
produce new plants.
4. Persistent growing apices:
the apices persists through
the long summer draught
and resume growth only
with the return of favorable
condition. With the
continuous growth the cell
of persistent apex, a new
thallus develops.
Vegetative Reproduction
7. a. It is oogamous type.
b. Male sex organs are antheridia and
female are archegonia.
c. Many species are monoecious while
some are dioecious. Formation of sex
organs are dependent on specific
photoperiods.
d. Anthoceros being a short day plant, sex
organs develop in winters.
e. Antheridia develop much earlier to
archegonia.
Sexual Reproduction
8. o Occurs on dorsal surface of thallus
in an acropetal succession inside
closed cavities called antheridial
chambers.
o It is differentiated into a long stalk
and club shaped body. The stalk is
multicellular, slender and consisted
of 4 vertical rows of elongated
cells.
o The club shaped body of
antheridium has single layered
sterile jacket enclosing a mass of
androcytes which metamorphose
into biflagellate curved
antherozoids.
Antheridia
10. A. These are embedded on dorsal surface of thallus
in an acropetal succession near growing point.
B. The archegonial chambers are absent.
C. It is flask shaped consisted of neck and venter.
D. It contains 4-6 neck canal cells, a venter cell and
an egg.
E. At maturity, the neck canal cells disintegrate and
become mucilaginous.
F. There are no jacket cells covering the
Archegonia.
G. Cover cells or Lid cells are found at the tip of
Archegonium.
Archegonia
12. ∂ The antherozoids swim in
water film.
∂ Some of these reach mature
archegonium.
∂ The mature archegonium is
characterized by mucilaginous
mound at its apex.
∂ The antherozoids pass through
mucilage and enter its wide
open canal.
∂ Single antherozoid fuses with
egg to form a diploid zygote.
Fertilization
13. The sporophyte is differentiated into 3 distinct
regions:
1. Foot: It is basal, bulbous parenchymatous
structure found deeply embedded in the
gametophyte. It helps in attaching the sporophyte
to gametophyte and in absorption of water and
nutrients from it.
2. Intermediate or intercalary zone: A narrow zone of
meristematic cells located between the basal foot
and the upper capsule. These cells help in the
continuous growth of the sporophyte.
3. Capsule: It is the fertile, major and conspicuous
part of the sporophyte which is long and
cylindrical. It is green when young, but turns grey
or brown on maturity.
Sporophyte/Sporogonium
14. The capsule is composed of the following structures:
1) Columella: It is central solid core of sterile cells,
consisting of 16 vertical rows of cells. It extends
from the base to almost to the tip of the capsule.
2) Sporogenous tissue: It is the mass of fertile
spore-forming cells surrounding the columella,
like a dome. At the base of the capsule, it is
single layered and called archesporial. It becomes
2-4 layered and develops into diploid spore
mother cells upwards. Towards the tip of the
capsule, the spore mother cells divide by meiosis
and produce haploid spores.
3) Capsule wall: It is the outer wall of the capsule
which is 4-6 layers in thickness. The outermost
layer is called epidermis which is interrupted by
stomata. The inner layers consist of
chlorenchymatous cells and are photosynthetic.