This document describes a micro project to develop a C. elegans tracking system using a digital microscope and tracking software. The project aims to analyze the locomotion of C. elegans to better understand the mechanisms underlying its forward movement. A Dino-Lite digital microscope will be used to record videos of C. elegans on an agar plate. Tracking software like WormLab and ImageJ will then analyze the videos to track the worm's movement and calculate metrics like number of bends and directional changes. The goal is to help elucidate the neural control of C. elegans locomotion and how it mediates the worm's foraging and avoidance behaviors.
This presentation contains basic information about the mouse being used as a model organism, its genome, how the genome of the mouse was sequenced and a comparison between mouse genome and human genome.
This pdf file tries to answer the question as to why model organisms are used is research. By definition, Model organisms are a group of species of organisms that have been studied extensively, largely because they are easy to maintain under controlled laboratory conditions. The reason for them being studied is usually because they possess a number of experimental advantages.
In 1963, Sydney Brenner introduced Caenorhabditis elegans as a model organism for pursuing research in developmental biology and neurology.It is a free-living, non-parasitic soil nematode that can be safely used in the laboratory and is common around the world.
This ppt gives an idea of general anatomy of this small creature,its life cylce,study as a model organism and its importance in the study of ageing.
Caenorhabditis elegans is a tiny, free-living nematode found worldwide. Newly hatched larvae are 0.25 millimeters long and adults are 1 millimeter long. Their small size means that the animals are usually observed with either dissecting microscopes, which generally allow up to 100X magnification, or compound microscopes, which allow up to 1000X magnification. Because C. elegans is transparent, individual cells and subcellular details are easily visualized using Nomarski (differential interference contrast, DIC) optics.
C. elegans has a rapid life cycle and exists primarily as a self-fertilizing hermaphrodite, although males arise at a frequency of <0.2%. These features have helped to make C. elegans a powerful model of choice for eukaryotic genetic studies. In addition, because the animal has an invariant numbers of somatic cells, researchers have been able to track the fate of every cell between fertilization and adulthood in live animals and to generate a complete cell lineage. Researchers have also reconstructed the shape of all C. elegans cells from electron micrographs, including each of the 302 neurons of the adult hermaphrodite. Moreover, because of the invariant wild-type cell lineage and neuroanatomy of C. elegans, mutations that give rise to developmental and behavioral defects are readily identified in genetic screens. Finally, because C. elegans was the first multicellular organism with a complete genome sequence, forward and reverse genetics have led to the molecular identification of many key genes in developmental and cell biological processes.
The experimental strengths and the similarities between the cellular and molecular processes present in C. elegans and other animals across evolutionary time (metabolism, organelle structure and function, gene regulation, protein biology, etc.) have made C. elegans an excellent organism with which to study general metazoan biology. At least 38% of the C. elegans protein-coding genes have predicted orthologs in the human genome, 60-80% of human genes have an ortholog in the C. elegans genome, and 40% of genes known to be associated with human diseases have clear orthologs in the C. elegans genome. Thus, many discoveries in C. elegans have relevance to the study of human health and disease.
A presentation on Zebrafish's history, taxonomy , genetics, life cycle and future prospects of zebrafish and some of its medical implications in human life. Most importantly the major interest is to investigate those particular gene that are responsible for regenerating the heart in zebrafish so that they can be applied to human heart and help im regenerating human heart without the formation of any scar.
This presentation contains basic information about the mouse being used as a model organism, its genome, how the genome of the mouse was sequenced and a comparison between mouse genome and human genome.
This pdf file tries to answer the question as to why model organisms are used is research. By definition, Model organisms are a group of species of organisms that have been studied extensively, largely because they are easy to maintain under controlled laboratory conditions. The reason for them being studied is usually because they possess a number of experimental advantages.
In 1963, Sydney Brenner introduced Caenorhabditis elegans as a model organism for pursuing research in developmental biology and neurology.It is a free-living, non-parasitic soil nematode that can be safely used in the laboratory and is common around the world.
This ppt gives an idea of general anatomy of this small creature,its life cylce,study as a model organism and its importance in the study of ageing.
Caenorhabditis elegans is a tiny, free-living nematode found worldwide. Newly hatched larvae are 0.25 millimeters long and adults are 1 millimeter long. Their small size means that the animals are usually observed with either dissecting microscopes, which generally allow up to 100X magnification, or compound microscopes, which allow up to 1000X magnification. Because C. elegans is transparent, individual cells and subcellular details are easily visualized using Nomarski (differential interference contrast, DIC) optics.
C. elegans has a rapid life cycle and exists primarily as a self-fertilizing hermaphrodite, although males arise at a frequency of <0.2%. These features have helped to make C. elegans a powerful model of choice for eukaryotic genetic studies. In addition, because the animal has an invariant numbers of somatic cells, researchers have been able to track the fate of every cell between fertilization and adulthood in live animals and to generate a complete cell lineage. Researchers have also reconstructed the shape of all C. elegans cells from electron micrographs, including each of the 302 neurons of the adult hermaphrodite. Moreover, because of the invariant wild-type cell lineage and neuroanatomy of C. elegans, mutations that give rise to developmental and behavioral defects are readily identified in genetic screens. Finally, because C. elegans was the first multicellular organism with a complete genome sequence, forward and reverse genetics have led to the molecular identification of many key genes in developmental and cell biological processes.
The experimental strengths and the similarities between the cellular and molecular processes present in C. elegans and other animals across evolutionary time (metabolism, organelle structure and function, gene regulation, protein biology, etc.) have made C. elegans an excellent organism with which to study general metazoan biology. At least 38% of the C. elegans protein-coding genes have predicted orthologs in the human genome, 60-80% of human genes have an ortholog in the C. elegans genome, and 40% of genes known to be associated with human diseases have clear orthologs in the C. elegans genome. Thus, many discoveries in C. elegans have relevance to the study of human health and disease.
A presentation on Zebrafish's history, taxonomy , genetics, life cycle and future prospects of zebrafish and some of its medical implications in human life. Most importantly the major interest is to investigate those particular gene that are responsible for regenerating the heart in zebrafish so that they can be applied to human heart and help im regenerating human heart without the formation of any scar.
Caenorhabditis elegans is a tiny, free-living nematode found worldwide. Newly hatched larvae are 0.25 millimetres long and adults are 1 millimetre long. Their small size means that the animals are usually observed with either dissecting microscopes, which generally allow up to 100X magnification, or compound microscopes, which allow up to 1000X magnification. Because C. elegans is transparent, individual cells and subcellular details are easily visualized using Nomarski (differential interference contrast, DIC) optics.
C. elegans has a rapid life cycle and exists primarily as a self-fertilizing hermaphrodite, although males arise at a frequency of <0.2%. These features have helped to make C. elegans a powerful model of choice for eukaryotic genetic studies. In addition, because the animal has an invariant number of somatic cells, researchers have been able to track the fate of every cell between fertilization and adulthood in live animals and to generate a complete cell lineage. Researchers have also reconstructed the shape of all C. elegans cells from electron micrographs, including each of the 302 neurons of the adult hermaphrodite. Moreover, because of the invariant wild-type cell lineage and neuroanatomy of C. elegans, mutations that give rise to developmental and behavioural defects are readily identified in genetic screens. Finally, because C. elegans was the first multicellular organism with a complete genome sequence, forward and reverse genetics have led to the molecular identification of many key genes in developmental and cell biological processes.
The experimental strengths and the similarities between the cellular and molecular processes present in C. elegans and other animals across evolutionary time (metabolism, organelle structure and function, gene regulation, protein biology, etc.) have made C. elegans an excellent organism with which to study general metazoan biology. At least 38% of the C. elegans protein-coding genes have predicted orthologs in the human genome, 60-80% of human genes have an ortholog in the C. elegans genome, and 40% of genes known to be associated with human diseases have clear orthologs in the C. elegans genome. Thus, many discoveries in C. elegans have relevance to the study of human health and disease.
Evolution of North American MicruracarusRachel Shoop
My research focuses on the evolution of North American water mites in the genus Arrenurus, Subgenus Micruracarus. In this presentation, I discuss why I chose to study these little known critters, and present some preliminary findings. Please contact me for more info.
A knockout mouse is a mouse in which a specific gene has been inactivated or“knocked out” by replacing it or disrupting it with an artificial piece of DNA.
The loss of gene activity often causes changes in a mouse's phenotype and thus provides valuable information on the function of the gene.
New Grant Funds Study of Worm to Understand Serotonin and BehaviorJean-Jacques Degroof
An educator, academic, and successful entrepreneur, Jean-Jacques Degroof has extensive experience in teaching about and building new ventures.
A few years ago, Jean-Jacques Degroof launched with MIT's International Science and Technology Initiative (MISTI) an edition of Global Startup Labs at the University of Louvain in Belgium.
MIT has always been at the helm of innovation, producing some of the country’s best and brightest talent, and this year, the school was granted funding for research to study behavior on a nematode. The study’s researchers chose C. elegans because the system from which they emit and receive serotonin is comparable to that of mammals.
Because of the complexities of the nervous system in mammals, researchers could not use mammals, but they instead chose this worm because the nematode's neurons can be precisely mapped out. Scientists can genetically control these cells including the five systems that regulate serotonin.
Being able to regulate all of the neurons in the worm’s nervous system allows them to study the release of serotonin and how this affects behavior. The first two experiments will focus on how the brain uses serotonin to control behavior, and the third experiment planned will focus on how this behavior changes in complex environments.
1 What is the study systemGeneral information. E.g. What is a .docxhoney725342
1 What is the study system?
General information. E.g. What is a “cell line”? Include images.
1 Why would a researcher use this study system?
The particular features of this system that make it useful. E.g. cell lines allow the study of genetically identical cells in many labs
1 What type of research questions can this study system be used to help answer?
List a few examples of research questions or general areas of research that can be addressed using this system. Elaborate a little on each, so we understand what you mean.
1 How does a researcher typically use this system?
What are the logistics of it? E.g. basic information about how they culture and propagate cell lines.
1 What are the pros and cons of this study system?
List and briefly explain any drawbacks or caveats that we should be aware of, along with particular benefits E.g. mammalian cell lines need adequate facilities and resources to be propagated, but they also allow for the study of mammalian cellular systems in vitro instead of studying another eukaryote like yeast.
6.Are there alternatives or variations on this study system?
If you can’t use this particular study system, what are your options for alternatives? E.g. Use yeast as a representative of a eukaryotic cell.
1 What is a real example from primary literature of this study system being used?
Provide a brief summary of the research that used the study system of interest, including the main objective, basic methods used, the main results, and conclusions. Include an image of at least one figure or table, along with an explanation of what that figure/table illustrates. You must provide the complete citation of the paper and/or a link to the online paper.
8.List of sources and places where we can find more information.
Background
C. elegans: A Simple Multicellular Model Organism
Scientists worldwide conduct basic research to address gaps in our knowledge in the hopes that this information can serve humanity in the future. Basic biological research seeks to answer questions of such elementary cellular and organismal activities as how cells grow, divide, die, move, store and use energy, and communicate.
Scientists use model organisms in basic research to answer these questions because model organisms offer simplified cellular systems that reproduce quickly, are easy to maintain, and are cost efficient. For example,
if a DNA mutation is known to result in a neurological disorder, more data can be generated using a model organism such as C. elegans, which reproduces and matures every 2–3 days, rather than waiting for a human child to mature and show symptoms. Commonly used basic model organisms include S. cerevisiae (yeast), C. elegans (nematode), D. melanogaster (fruit fly), and M. musculus (mouse).
Despite the seeming lack of a relationship to human beings, these model organisms have helped researchers understand the basic cellular machinery underlying a host of human pathologies such as cancer, neurological disorders, ...
Caenorhabditis elegans is a tiny, free-living nematode found worldwide. Newly hatched larvae are 0.25 millimetres long and adults are 1 millimetre long. Their small size means that the animals are usually observed with either dissecting microscopes, which generally allow up to 100X magnification, or compound microscopes, which allow up to 1000X magnification. Because C. elegans is transparent, individual cells and subcellular details are easily visualized using Nomarski (differential interference contrast, DIC) optics.
C. elegans has a rapid life cycle and exists primarily as a self-fertilizing hermaphrodite, although males arise at a frequency of <0.2%. These features have helped to make C. elegans a powerful model of choice for eukaryotic genetic studies. In addition, because the animal has an invariant number of somatic cells, researchers have been able to track the fate of every cell between fertilization and adulthood in live animals and to generate a complete cell lineage. Researchers have also reconstructed the shape of all C. elegans cells from electron micrographs, including each of the 302 neurons of the adult hermaphrodite. Moreover, because of the invariant wild-type cell lineage and neuroanatomy of C. elegans, mutations that give rise to developmental and behavioural defects are readily identified in genetic screens. Finally, because C. elegans was the first multicellular organism with a complete genome sequence, forward and reverse genetics have led to the molecular identification of many key genes in developmental and cell biological processes.
The experimental strengths and the similarities between the cellular and molecular processes present in C. elegans and other animals across evolutionary time (metabolism, organelle structure and function, gene regulation, protein biology, etc.) have made C. elegans an excellent organism with which to study general metazoan biology. At least 38% of the C. elegans protein-coding genes have predicted orthologs in the human genome, 60-80% of human genes have an ortholog in the C. elegans genome, and 40% of genes known to be associated with human diseases have clear orthologs in the C. elegans genome. Thus, many discoveries in C. elegans have relevance to the study of human health and disease.
Evolution of North American MicruracarusRachel Shoop
My research focuses on the evolution of North American water mites in the genus Arrenurus, Subgenus Micruracarus. In this presentation, I discuss why I chose to study these little known critters, and present some preliminary findings. Please contact me for more info.
A knockout mouse is a mouse in which a specific gene has been inactivated or“knocked out” by replacing it or disrupting it with an artificial piece of DNA.
The loss of gene activity often causes changes in a mouse's phenotype and thus provides valuable information on the function of the gene.
New Grant Funds Study of Worm to Understand Serotonin and BehaviorJean-Jacques Degroof
An educator, academic, and successful entrepreneur, Jean-Jacques Degroof has extensive experience in teaching about and building new ventures.
A few years ago, Jean-Jacques Degroof launched with MIT's International Science and Technology Initiative (MISTI) an edition of Global Startup Labs at the University of Louvain in Belgium.
MIT has always been at the helm of innovation, producing some of the country’s best and brightest talent, and this year, the school was granted funding for research to study behavior on a nematode. The study’s researchers chose C. elegans because the system from which they emit and receive serotonin is comparable to that of mammals.
Because of the complexities of the nervous system in mammals, researchers could not use mammals, but they instead chose this worm because the nematode's neurons can be precisely mapped out. Scientists can genetically control these cells including the five systems that regulate serotonin.
Being able to regulate all of the neurons in the worm’s nervous system allows them to study the release of serotonin and how this affects behavior. The first two experiments will focus on how the brain uses serotonin to control behavior, and the third experiment planned will focus on how this behavior changes in complex environments.
1 What is the study systemGeneral information. E.g. What is a .docxhoney725342
1 What is the study system?
General information. E.g. What is a “cell line”? Include images.
1 Why would a researcher use this study system?
The particular features of this system that make it useful. E.g. cell lines allow the study of genetically identical cells in many labs
1 What type of research questions can this study system be used to help answer?
List a few examples of research questions or general areas of research that can be addressed using this system. Elaborate a little on each, so we understand what you mean.
1 How does a researcher typically use this system?
What are the logistics of it? E.g. basic information about how they culture and propagate cell lines.
1 What are the pros and cons of this study system?
List and briefly explain any drawbacks or caveats that we should be aware of, along with particular benefits E.g. mammalian cell lines need adequate facilities and resources to be propagated, but they also allow for the study of mammalian cellular systems in vitro instead of studying another eukaryote like yeast.
6.Are there alternatives or variations on this study system?
If you can’t use this particular study system, what are your options for alternatives? E.g. Use yeast as a representative of a eukaryotic cell.
1 What is a real example from primary literature of this study system being used?
Provide a brief summary of the research that used the study system of interest, including the main objective, basic methods used, the main results, and conclusions. Include an image of at least one figure or table, along with an explanation of what that figure/table illustrates. You must provide the complete citation of the paper and/or a link to the online paper.
8.List of sources and places where we can find more information.
Background
C. elegans: A Simple Multicellular Model Organism
Scientists worldwide conduct basic research to address gaps in our knowledge in the hopes that this information can serve humanity in the future. Basic biological research seeks to answer questions of such elementary cellular and organismal activities as how cells grow, divide, die, move, store and use energy, and communicate.
Scientists use model organisms in basic research to answer these questions because model organisms offer simplified cellular systems that reproduce quickly, are easy to maintain, and are cost efficient. For example,
if a DNA mutation is known to result in a neurological disorder, more data can be generated using a model organism such as C. elegans, which reproduces and matures every 2–3 days, rather than waiting for a human child to mature and show symptoms. Commonly used basic model organisms include S. cerevisiae (yeast), C. elegans (nematode), D. melanogaster (fruit fly), and M. musculus (mouse).
Despite the seeming lack of a relationship to human beings, these model organisms have helped researchers understand the basic cellular machinery underlying a host of human pathologies such as cancer, neurological disorders, ...
White Paper: In vivo Fiberoptic Fluorescence Microscopy in freely behaving miceFUJIFILM VisualSonics Inc.
Fiberoptic fluorescence microscopy (FFM) employs optical fibers as small as 300 micrometers in diameter and offers the ability to image cellular and subcellular processes in deep brain structures including the Ventral Tegmental Area (VTA) and the substantia nigra (Sn).
The basics for symbiosis of Optics and Genetics have been explained in this presentation. " How light can change the very way of life?" .This question has been addressed using relevant web content, consultations from book and through nature videos. This presentation was awarded the highest score in PHM805 at Dayalbagh Educational Institute, Agra.
Bright field microscopy, Principle and applicationsKAUSHAL SAHU
Introduction
History
Basic Component of Microscope
Light Microscopy
Types of Light Microscopy
What Are Bright Microscopy
Principle of Bright Microscope
Advantage
Disadvantage
Application
Conclusion
Reference
Microdialysis is an integral part of preclinical research to determine extracellular fluid and blood concentrations of metabolites, hormones, drugs, etc, and is often used in quantifying the biochemistry of brain and peripheral tissues. However, it is a molecular-only technique and other imaging modalities are needed to provide the researcher with functional and anatomical information of the animal in vivo.
Investigating cellular metabolism with the 3D Cell ExplorerMathieuFRECHIN
Long-term imaging of fine dynamics of cellular organelles is today’s biggest challenge in cell biology
(Frechin et al., 2015; Kruse & Jülicher, 2005; Kueh, Champhekhar, Nutt, Elowitz, & Rothenberg, 2013;
Skylaki, Hilsenbeck, & Schroeder, 2016). The goal is to acquire not only snapshots of dynamic biological
systems, but to actually see processes unfolding over time in term of spatial and morphological
changes and biological outcome (Muzzey, Gómez-Uribe, Mettetal, & van Oudenaarden, 2009).
Imaging over time is of utmost importance in the study of key organelles implicated in cellular
metabolism: mitochondria and lipid droplets. The current method of choice in high-content live
imaging approaches is fluorescence microscopy. However, fluorescence microscopy induces
phototoxicity when the sample is stimulated at various wavelengths. This stress induces cellular
damages via radical-induced cellular structure alterations, which limits live imaging possibilities.
Therefore, with the current live cell imaging strategies a tradeoff must be found between short
live cell imaging with high-frequency acquisition or long-term live cell imaging with low-frequency
acquisition.
On one hand, high-frequency acquisition induces a lot of phototoxic stress and, if successful, a
researcher might observe fine dynamics but cannot be sure that they have not been perturbed
by the imaging process. On the other hand, low-frequency acquisition might be more sustainable,
however, fine dynamics are lost, while the observed phenomenon, to a lesser extent, could likewise
be perturbed by the imaging process.
Epi-Fluorescence Microscopy: Explore Its Amazing Powers and Uses | The Lifesc...The Lifesciences Magazine
Epi-fluorescence microscopy, also known as epifluorescence microscopy, is a specialized imaging technique that utilizes fluorescence to illuminate specimens of interest.
Noninvasive, Automated Measurement of Sleep, Wake and Breathing in RodentsInsideScientific
In this exclusive webinar sponsored by Signal Solutions LLC, Dr. Bruce O’Hara discusses methodology, best-practices and use studies of the PiezoSleep system. Discussion focuses on how these techniques can answer questions about animal behavior, phenotyping and relationships between sleep and disease. Dr. O’Hara also highlights the benefits of the PiezoSleep system that can assess sleep, wake and breathing variables.
Bioreactors are essential in tissue
engineering, not only because they provide an
in vitro environment mimicking in vivo conditions
for the growth of tissue substitutes, but also
because they enable systematic studies of the
responses of living tissues to various mechanical
and biochemical cues.
DIFFUSION BASED AND VASCULAR CONSTRUCTS, TRANSPORT OF NUTRIENTS AND METABOLITES Vijay Raj Yanamala
he biggest challenge in the field of tissue engineering remains mass transfer
limitations. This is the limiting factor in the size of any tissue construct grown in vitro.
Within the body, most cells are found no more than 100–200mm from the nearest
capillary, with this spacing providing sufficient diffusion of oxygen, nutrients, and waste
products to support and maintain viable tissue. Likewise, when tissues grown in the
laboratory are implanted into the body, this diffusion limitation allows only cells within
100–200mm from the nearest capillary to survive.
Thus, it is critical that a tissue be pre-vascularized before implantation with proper
consideration given to the cell and tissue type, oxygen and nutrient diffusion rates, overall
construct size, and integration with host vasculature. In the laboratory, limited diffusion
of oxygen is the primary reason that construction of tissues greater than a few hundred
microns in thickness is currently not practicable.
Approaches to address this problem generally fall into six major categories:
scaffold functionalization,
cell-based techniques,
bioreactor designs,
(d)microelectromechanical systems(MEMS)–related approaches,
modular assembly,
in vivo systems
DIFFUSION BASED AND VASCULAR CONSTRUCTS, TRANSPORT OF NUTRIENTS AND METABOLITES Vijay Raj Yanamala
Tissue Engineering is the study of the growth of new connective tissues, or organs, from cells and a collagenous scaffold to produce a fully functional organ for implantation back into the donor host. It also refers to the application of engineering principles to the design of tissue replacements, usually formed from cells and biomolecules. Tissue engineering is a fast growing area of research that aims to create tissue equivalents of blood vessels, heart muscle, nerves, cartilage, bone, and other organs for replacement of tissue either damaged through disease or trauma. As an interdisciplinary field, principles from biological, chemical, electrical, materials science, and mechanical engineering are employed in research and development. Concepts and discoveries from the fields of molecular and cell biology, physiology and immunology are also readily incorporated into research activities for tissue engineering. Recent advancements in stem cell research provide exciting opportunities of using stem cells for regeneration of tissues and organs.
The Medicines and Healthcare products Regulatory Agency (MHRA) is a government body which was set up in 2003 to bring together the functions of the Medicines Control Agency (MCA) and the Medical Devices Agency (MDA).
The Agency has the power to withdraw a product from the market, and in the case of medicines, to suspend production. The Agency can also prosecute a manufacturer or distributor if the law has been broken. The regulations need to be robust enough to protect the public’s health, and this costs money. The MHRA is funded largely by public monies from government for the regulation of devices, and by fees from the pharmaceutical industry for the regulation of medicines.
RAS (reticular activating system) is a set of connected nuclei responsible for regulating wakefulness and sleep wake transitions. RAS has both cholinergic and adrenergic components.
Anatomical components of RAS are
• Mid-brain reticular formation,
• Dorsal hypo-thalamus,
• Thalamic intra laminar nuclei,
• Tegmentum
Leucodepletion is a technical term for the removal of leucocytes (white blood cells) from blood components using special filters.
The leucocytes present in donated blood play no therapeutic role in transfusion and may be a cause of adverse transfusion reactions.
Removal of leucocytes may therefore have a number of potential benefits for transfusion recipients.
In medical field, a catheter is a thin tube made from biomaterial material that
has wide range of uses. Catheters are medical devices that can be inserted in the
body to treat diseases or perform a surgical procedure. Catheters are mainly used
in cardiovascular, urological, gastrointestinal, neurovascular, and ophthalmic
surgical applications.
Catheters can be inserted into a body cavity, duct, or vessel. Functionally, they
allow drainage, administration of fluids or gases, access by surgical instruments,
and also perform a wide variety of other tasks depending on the type of catheter.
The process of inserting a catheter is catheterization. In most uses, catheter is a
thin, flexible tube though catheters are available in varying levels of stiffness
depending on the application. A catheter left inside the body, either temporarily or permanently, may be referred to as an indwelling catheter.
DERIVATION OF MODIFIED BERNOULLI EQUATION WITH VISCOUS EFFECTS AND TERMINAL V...Wasswaderrick3
In this book, we use conservation of energy techniques on a fluid element to derive the Modified Bernoulli equation of flow with viscous or friction effects. We derive the general equation of flow/ velocity and then from this we derive the Pouiselle flow equation, the transition flow equation and the turbulent flow equation. In the situations where there are no viscous effects , the equation reduces to the Bernoulli equation. From experimental results, we are able to include other terms in the Bernoulli equation. We also look at cases where pressure gradients exist. We use the Modified Bernoulli equation to derive equations of flow rate for pipes of different cross sectional areas connected together. We also extend our techniques of energy conservation to a sphere falling in a viscous medium under the effect of gravity. We demonstrate Stokes equation of terminal velocity and turbulent flow equation. We look at a way of calculating the time taken for a body to fall in a viscous medium. We also look at the general equation of terminal velocity.
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...University of Maribor
Slides from talk:
Aleš Zamuda: Remote Sensing and Computational, Evolutionary, Supercomputing, and Intelligent Systems.
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Inter-Society Networking Panel GRSS/MTT-S/CIS Panel Session: Promoting Connection and Cooperation
https://www.etran.rs/2024/en/home-english/
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/
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.
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.
The ability to recreate computational results with minimal effort and actionable metrics provides a solid foundation for scientific research and software development. When people can replicate an analysis at the touch of a button using open-source software, open data, and methods to assess and compare proposals, it significantly eases verification of results, engagement with a diverse range of contributors, and progress. However, we have yet to fully achieve this; there are still many sociotechnical frictions.
Inspired by David Donoho's vision, this talk aims to revisit the three crucial pillars of frictionless reproducibility (data sharing, code sharing, and competitive challenges) with the perspective of deep software variability.
Our observation is that multiple layers — hardware, operating systems, third-party libraries, software versions, input data, compile-time options, and parameters — are subject to variability that exacerbates frictions but is also essential for achieving robust, generalizable results and fostering innovation. I will first review the literature, providing evidence of how the complex variability interactions across these layers affect qualitative and quantitative software properties, thereby complicating the reproduction and replication of scientific studies in various fields.
I will then present some software engineering and AI techniques that can support the strategic exploration of variability spaces. These include the use of abstractions and models (e.g., feature models), sampling strategies (e.g., uniform, random), cost-effective measurements (e.g., incremental build of software configurations), and dimensionality reduction methods (e.g., transfer learning, feature selection, software debloating).
I will finally argue that deep variability is both the problem and solution of frictionless reproducibility, calling the software science community to develop new methods and tools to manage variability and foster reproducibility in software systems.
Exposé invité Journées Nationales du GDR GPL 2024
Phenomics assisted breeding in crop improvementIshaGoswami9
As the population is increasing and will reach about 9 billion upto 2050. Also due to climate change, it is difficult to meet the food requirement of such a large population. Facing the challenges presented by resource shortages, climate
change, and increasing global population, crop yield and quality need to be improved in a sustainable way over the coming decades. Genetic improvement by breeding is the best way to increase crop productivity. With the rapid progression of functional
genomics, an increasing number of crop genomes have been sequenced and dozens of genes influencing key agronomic traits have been identified. However, current genome sequence information has not been adequately exploited for understanding
the complex characteristics of multiple gene, owing to a lack of crop phenotypic data. Efficient, automatic, and accurate technologies and platforms that can capture phenotypic data that can
be linked to genomics information for crop improvement at all growth stages have become as important as genotyping. Thus,
high-throughput phenotyping has become the major bottleneck restricting crop breeding. Plant phenomics has been defined as the high-throughput, accurate acquisition and analysis of multi-dimensional phenotypes
during crop growing stages at the organism level, including the cell, tissue, organ, individual plant, plot, and field levels. With the rapid development of novel sensors, imaging technology,
and analysis methods, numerous infrastructure platforms have been developed for phenotyping.
Richard's aventures in two entangled wonderlandsRichard 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
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C-elegans locomotion tracking system
1. C. Elegans tracking system
Micro project report
16/9/2015
Guide: Dr. Anoop Kumar T.
Scientist F
Molecular Medicine Lab
Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum
By
Yanamala Vijay Raj
Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum
2. ABSTRACT:
The popular model organism Caenorhabditis elegans is a tiny nematode worm
with a largely invariant nervous system, consisting of exactly 302 neurons with
known connectivity. The worm is capable of a surprisingly rich repertoire of
behaviors including navigation and foraging, mating, learning, and even
rudimentary social behavior. Indeed, this humble worm provides us with the first
tangible possibility of understanding the complex behaviors of an organism from
the genetic level, right up to the system level.
Moreover, the behavioral roles of many of these neurons can be uncovered using
experimental setup that can track the locomotion of worm. Despite its small size
and the apparent simplicity of the underlying nervous system, The focus of this
project is on the locomotion tracking system which is motivated part by the fact
that most, if not all, of the worm’s behaviors are mediated by some form of
locomotion. The main objective of this project is to help elucidate the mechanisms
underlying C. elegans forward locomotion.
3. CONTENT TABLE
1) Introduction
1.1 C-Elegans
1.2 Types of Microscopy
2) Methods and Materials
2.1 Nematodes
2.2 Dino-capture Digital Microscope
2.3 List of tracking Software
2.4 Experiment set up
3) Results and Discussions
3.1 Problems identified
3.2 Possible solutions
3.3 Image J
3.4 Conclusions
4. 1. INTRODUCTION
1.1 C-Elegans:
Model organisms are certain species of organisms that are widely used for
research purpose in biological field. Since they are easy to breed and maintain
most of experimental studies are done on them. Certain fields like toxicology,
Neurology, genetics direly need model organisms to test and experiment on their
hypothesis.
The nematode C-Elegans (Caenorhabditis elegans) is widely used for studies of
nervous system function and developmental biology. It is approximately 1 μm in
length and feeds on bacteria like E-coli. It has a simple nervous system which is
well characterized. It has just 302 neurons, thereby makes it a attractive model
organism for neurological studies. Despite its anatomical simplicity, the C. elegans
nervous system mediates diverse and intricate patterns of behavior. The sense
organs of C. elegans are capable of perceiving and responding to a wide range of
environmental conditions, including heavy and light touch, temperature, volatile
odorants, food and other nematodes.
Fig1: GFP tagged C-Elegans
Thank to this humble creature we now have tangible possibility of understanding
the complex behaviors of an organism from the genetic level, right up to the
system level.
5. 1.2 Types of Microscopy:
Microscopes are biomedical instruments that are mostly used for examination of
specimens that are invisible to naked eye. From light microscopy to latest
fluorescent microscopy, microscopes have seen tremendous changes in it mode of
operation. By looking at different types of microscope and its mode of operation,
we will conclude which mode of visualization should be deployed to visualize
microorganisms like C-Elegans.
Light microscopy:
The type of microscopes which uses light as source of energy to visualize
specimens are called light microscopy.
Antonie van Leeuwenhoek was first to pioneer in using microscopy techniques to
biology. He is credited with father of microbiology for his tremendous contribution
in improving microscope.
The single-lens microscopes of Van Leeuwenhoek were relatively small devices.
They are used by placing the lens very close in front of the eye, while looking in
direction of the sun. The other side of the microscope had a pin, where the sample
was attached in order to stay close to the lens. There were also three screws that
allowed to move the pin, and the sample, along three axes.
Fig2: Antonie van Leeuwenhoek Microscope
The light microscope, is a type of microscope which uses visible light and a
system of lenses to magnify images of small samples.
6. Fig3: Optical microscope
Simple microscopes are microscopes that makes use of single convex lens to create
an enlarged virtual image. They are not capable of high magnification.
Digital microscopes are variants of simple microscope with camera mounted on it
to visualize sample on computers. USB digital microscopes are also available.
Fig4: USB Microscope
7. Electron Microscopy:
With the advancement in physics, few scientists started wondering, why
electrons can’t be used for imaging purpose. This though gave rise to electron
microscopy. Images are based on secondary X-rays emission from samples.
Transmission electron microscopy and scanning electron microscopy are the main
types of electron microscopy.
Phase Contrast Microscopy:
For deep visualizing of transparent organisms, traditional microscopes can’t be
used. New techniques have been constantly employed to increase the contrast of
the sample.
Among them fluorescent techniques and phase contrast techniques have gained
importance. The phase contrast optics of a microscope is able to convert the
differences in the refractive index into a difference in brightness.
Right light or green light is often used in phase contrast microscopy.
Fig5: Image contrast enhanced by Fluorescent techniques
Fig6: Image contrast enhanced by inverse phase contrast microscopy
8. The above pictures clearly shows the difference between bright field and phase
contrast microscopy images. Now gaining sufficient theoretical knowledge in
microscopy we planned to build an experimental setup for analyzing the
movements of C-Elegans.
2) Methods and Materials
2.1 Nematodes:
Standard methods for classifying the behavioral patterns of mutant
Caenorhabditis elegans rely on human observation and are therefore subjective.
Behavioral assays in this organism, particularly in more complex behaviors such as
locomotion, are often highly imprecise and important
The main objective of this micro project is to build an experimental setup to
visualize and record the worm on petri plate, and later analyze the video with
software thereby elucidating locomotion of it. While the underlying neural control
obviously plays a major role in locomotion.
The worm’s locomotion is of particular interest in project, due to its involvement
in higher level behaviors, as well as the fact that it is directly observable and easily
quantifiable. Despite the small underlying circuit, locomotion is an adaptive
behavior that changes significantly depending on the worm’s environment and
allows it to navigate effectively. In the laboratory C. elegans worms are typically
grown in petri dishes containing a layer of agar gel. The gel is quite firm, and
worms tend to lie on the surface rather than burrowing into it. The locomotion
behavior observed under these conditions is referred to as crawling.
Fig7: Image of c elegans on media
9. BEHAVIOR OF WORM TOWARDS STIMULUS AND IT LOCOMATION:
Despite its small size and relative anatomical simplicity, C. elegans is capable of
a remarkably rich repertoire of behaviors which, although simpler, have close
parallels in larger animals. Like all animals the worm exists to reproduce. Since it
is hermaphrodite, it takes no active role in mating, and thereby its primary goal
becomes survival which, in turn, necessitates eating and threat avoidance.
The worm exhibits chemotaxis towards chemicals usually associated with food,
while exhibiting a strong avoidance response to certain chemical repellents that are
associated with danger. The worm also has a thermotaxis behavior, which
manifests as a preference for temperatures at which the worm was previously fed
and an avoidance of temperatures at which it was starved. This is also an example
of associative learning in C. elegans.
Similar tactics could be employed to teach worm and experiment on its
associative learning. The no of bends and the directions of its locomotion gives a
good statistical data about it behavior which is directly related to its associated
memory.
Fig8: Direction change
10. 2.2 Dino-capture Digital Microscope:
Dino-Lite are digital microscopes which are basic optical microscopes. It has
USB extension that can be connected to computers. Dinelite software installed on
PC serves as platform to capture and record videos of samples by Dino-Lite
camera microscope.
Fig9: Dino-Lite digital microscope
AM5216ZT Dino-Lite Edge is used in our project. It comes handy with a
movable stand. It has magnification of about 20x to 200x. It also has ultraviolent
light and normal light for sample illumination purpose.
The recorded videos are saved in digital microscope folder in C drive. Generally
videos are saved in flv, wmv formats. Images are saved in various available format
11. 2.3 List of tracking Software
Various software are available in market. While some are free, some are pro
version. As part of project we had evaluated different softwares and shortlisted few
based on experimental set up we had.
The list of softwares which are predominately used for nematode tracking are
1) WormLab (exe),
2) Worm Tracker (Matlab),
3) Worm Tracker 2.0 (labview),
4) Image J,
5) Nemo (Matlab),
6) Maggot tracker.
WormLab:
Womlab software was developed by MBF bioscience lab. It is most used
software cited in research journals. Algorithms deployed automatically detects
worm and created visual matrix overlapping worm and calculates the locomotion
of worm based on the motion analysis of matrix.
Fig10: Wormlab
File is exported by clicking on import image sequence. Brightness of file is
adjusted so that a clear contrast is seen between worm and media. Click on detect
and track button for the software to automatically detect the worm and set the
parameters for tracking.
After the file is executed the results are displayed on Analyze Data tab.
12. NEMO:
Nemo was an algorithm based on Matlab that has GUI interface. It tracks the
motion of worm and gives parameters of location of worm.
Fig11: Nemo
Worm Track:
This software too is matlab based and has user friendly GIU interface. It can
track the locomotion and give statistical data about it.
Fig12: Wormtracker
13. Image J:
It is java based image processing software, which is one of the most famous free
software available on internet. On this software interface many plugins like
WrmTr, Bio-formats, Neuron J can be added and image processing can be done.
Fig13: Image J
Fig14: Import image sequences in Image J
14. 2.4 Experiment set up
With sufficient knowledge of microscope & software to analyze motion
experimental setup is designed.
Salient features of work tracking setup includes
i. Illuminator that can help in imaging worm by creating phase contrast.
ii. Digital microscope to record motion of worm.
iii. Adjust stand to move microscope in three axis.
iv. Stand to hold the sample.
v. Filter for equal intensity of illumination.
vi. Closed environment if possible.
Fig15: Experimental Setup
15. 3. Results and Discussions
3.1 Problems identified
i. Worms are transparent and imaging them need right focus and
magnification.
ii. Proper experiment setup.
iii. Enhancing contrast of the image.
iv. Principle of microscopy to be deployed.
v. User-friendly software for worm tracking.
vi. Source of illumination to use.
3.2 Possible solution
Of all the problems identified enhancing contrast of image is a major constrain. It
is planned to increase contrast by either using fluorescence techniques or refractive
index techniques.
Fluorescence techniques:
Fig16: Fluorescent microscopy
Dino lite microscope comes with infrared light illuminator. Hence the same
camera could be used for imaging fluorescence worms. Thereby glass strip with
thin layer of agar coating was thought to be used for increased magnification of
worm (ie) dinolite microscope gives maximum magnification at closer range of
sample.
16. Fig17: Glass strip setup
Refractive index based:
It is noticed by using red light as source of light in microscopy, the contrast of
image can be drastically improved. As red light has maximum wavelength in
visible spectrum, it can increase contrast of image by phase shift, taking advantage
of refractive index difference between worm and media.
Fig18: Phase shift
By applying basic physics principle to experimental setup imaging with high
contrast is achieved.
Fig19: Normal image of worm on medium
17. Fig20: Fluorescent image taken using UV lamp& Dinolite
Fig21: Image taken using Red light
Fig22: Binary Image
19. 3.3 Image J:
It is finalized to use image J for video processing and locomotion tracking of worm
by wormtrack plugin.
Fig25: Image J
o Recorded video in dinolite camera are in flv, wkv formats, which can’t be
imported directly by imageJ.
o The video should be either in uncompressed avi format or image sequence
(JPEG) formats.
o Format-factory software was used to convert videos to avi format which is in
compressed form.
o Therefore virtual dub software was used to convert compressed avi to
uncompressed avi.
o There is a provision to export video as image sequence too.
o Image sequence imported in image J
o Subtraction of pixel intensity done to reduce image noise.
o Image converted to binary image by thresholding.
o Scale is set and wormtrack plugin loaded. Required paramaters are filled in
and run.
Fig 26: Image J tracking results
20. Fig27: Parameters measured by Image J, wormtrack plugin
Fig28: Aspect ratio vs frame and worm locomotion track
21. CONCLUSIONS:
o C.elegans locomotion studied
o Image constrast can be increased by making use of simple physics
techniques.
o Image J and wormlab are finalized to be user-friendly.
o Error in loading file on Image J was solved using virtual dub.
o Converting image to binary image and thresholding of it was learned.
o Locomotion was tracked by wormtracker plugin of ImageJ