nano-bubble
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1) Nano-bubbles are smaller than microbubbles and have a longer lifetime, lasting several months compared to microbubbles which shrink and disappear within minutes. 2) Nano-bubbles are stabilized by a mechanism where ions accumulate on their surface, preventing the gas from dispersing and allowing the bubbles to persist for longer. 3) Ozone nano-bubbles are more effective at disinfecting and sterilizing than conventional ozone water methods, able to inactivate over 99% of viruses within 1 day.
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This document provides an overview of irrigation in endodontics. It discusses the properties of ideal irrigating solutions, the functions of irrigation, classifications of irrigants, and commonly used irrigating solutions such as sodium hypochlorite, EDTA, and chlorhexidine. It also covers irrigation techniques, factors that influence irrigant activity, and the effects of irrigants on dentin composition, bonding to dentin, and penetration into dentinal tubules. Adverse effects of sodium hypochlorite are also summarized.Nanotechnology in waste water treatment
Nanotechnology in waste water treatment9495094029
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This document discusses the use of nanotechnology for wastewater treatment. It notes that over 75% of the Earth is covered in water, but less than 1% is accessible freshwater for human use. Nanomaterials like dendrimers, metal nanoparticles, zeolites and carbon nanotubes can be used for wastewater treatment through processes like nanosorption, nanofiltration and photocatalysis. These nanomaterials have advantages over conventional treatment methods like higher efficiency and capacity. However, scaling up nanotechnology for wastewater treatment remains a challenge.Nanotechnology appilication in wastewater management (1).pptx
Nanotechnology appilication in wastewater management (1).pptxSmritiRanjan9
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1) Nanotechnology involves structures and devices on the nanometer scale, which is roughly the size of atoms and molecules.
2) Nanotechnology can purify water by using nanoparticles like silver, titanium dioxide, and iron oxide, which adsorb and catalytically degrade contaminants. Nanomaterials also improve filtration membranes and the performance of water treatment chemicals.
3) Oil spills can be cleaned up using nanoparticle dispersants to break up oil, nanomaterial sorbents to absorb oil, and nanoemulsions to encapsulate oil for easier recovery, while development of nanorobots also shows promise for selective oil removal.Adsorption of Silver Ions from Aqueous Solution onto Thiol Modified Polyvinyl...
Adsorption of Silver Ions from Aqueous Solution onto Thiol Modified Polyvinyl...CrimsonpublishersTTEFT
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The document discusses the fabrication of thiol-modified polyvinyl alcohol (PVA) nanofibers for the adsorption of silver ions from aqueous solutions. The crosslinked PVA nanofibers were modified using 3-mercaptopropionic acid to enhance their adsorption capacity, achieving a maximum adsorption of 26.2 mg/g. Characterization methods, including scanning electron microscopy and Fourier transform infrared spectroscopy, confirmed the successful modification and effectiveness of these nanofibers in removing silver ions from water.Chinwe eze seminar presentation
Chinwe eze seminar presentationCHARLES EZE
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Eze Chinwe Catherine presented on applying nanotechnology to microbial pollution control. Key points:
1) Nanotechnology involves manipulating matter at the atomic scale between 1-100 nanometers. Properties change dramatically at this scale, enabling novel applications like selective sensors, fast dissolution, and catalytic/antimicrobial activity.
2) Nanomaterials like carbon nanotubes, nanoparticles, and dendrimers have antimicrobial properties that can physically pierce cells and inhibit biofilm formation on surfaces. Silver nanoparticles generate ions that bind to microbes and inactivate them.
3) Nanotechnology enables more targeted and effective bioremediation through enzyme immobilization techniques like single enzyme nanoparticles, which allow enzymes to withstand extreme conditions while maintainingNano-coating ,Nano-treatments novel approaches to Extend the post harvest lif...
Nano-coating ,Nano-treatments novel approaches to Extend the post harvest lif...Aisha Kolhar
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The document discusses nanotechnology and its application in extending the post-harvest life of horticultural produce. It highlights the unique properties of nanoparticles and their benefits in post-harvest technologies, supported by various case studies. Additionally, it addresses potential health and environmental risks associated with the use of nanoparticles, suggesting the need for focused research and new regulatory measures.Spectroscopic methods IR part 1
Spectroscopic methods IR part 1Chris Sonntag
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This document discusses spectroscopic methods in inorganic chemistry, focusing on infrared (IR) spectroscopy. It provides information on:
1. The interactions of light with molecules and what spectroscopic methods involve excitation by light.
2. How polarity and dipole moments are calculated and why CO2 and CCl4 do not have a dipole moment.
3. The factors that influence the wavenumber of a bond vibration, including bond energy, multiple bonds, atom weights and hybridization, and types of vibrational motions. PresentationNo 3 German japan
PresentationNo 3 German japanKonstantin German
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This document discusses using algae and bacteria to purify radioactive waste and recover metals. It summarizes that:
1) Haloalkaliphilic bacteria from soda lakes and the blue-green alga Spirulina platensis can reduce nitrate levels in liquid radioactive waste from 1 g/dm3 to 10-15 mg/dm3 through denitrification.
2) These microorganisms can also sorb uranium, thorium, strontium, technetium, and cesium from radioactive waste with high efficiency, and immobilize metals like lanthanum, vanadium, chromium, and uranium.
3) Specifically, haloalkaliphilic bacteria reducedPresentation given at SKYREC seminar, 2011
Presentation given at SKYREC seminar, 2011Tero Luukkonen
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The document details a study on activated carbon and UV treatment for removing total organic carbon (TOC) from water, highlighting tests on water treatment processes and their effects. Activated carbon showed a TOC reduction of 40-65% and required a subsequent microbial bed to manage conductivity and silica levels. UV treatment was less effective, achieving a TOC removal of up to 30%, with no significant improvements when altering treatments or equipment configurations.Nanotechnologies in water and air pollution treatment
Nanotechnologies in water and air pollution treatmentSadia RaNa
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Nanotechnology can help treat water and air pollution in several ways. In water treatment, nano-sized particles and polymers can be used to remediate contaminants through methods like adsorption, filtration, and bioremediation. Pump and treat systems and permeable reactive barriers employ nanomaterials to purify groundwater without bringing it above ground. Air pollutants like NOx, dioxins, and CO2 can also be captured and removed using adsorbents like activated carbon, zeolites, and carbon nanotubes that are modified with other chemicals. Future applications of nanotechnology may include targeted drug delivery, environmental sensors, self-healing materials, and technologies to address climate change through more effective pollution control.Application of nanotechnology in reference to pest management
Application of nanotechnology in reference to pest managementJyoti Prakash Sahoo
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The document discusses the applications of nanotechnology in pest management, highlighting the unique properties and production methods of nanoparticles. It details various formulations like nanoemulsions, nanosuspensions, and nanocapsules that improve the efficacy and safety of pesticides. Additionally, it addresses potential risks associated with nanotechnology in agriculture and emphasizes the importance of responsible management and research for product safety.Adsorption of Silver Ions from Aqueous Solution onto Thiol Modified Polyvinyl...
Adsorption of Silver Ions from Aqueous Solution onto Thiol Modified Polyvinyl...CrimsonpublishersTTEFT
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Ad
nano-bubble
- 1. Fantastic Properties of Nano-bubbles Kaneo Chiba Masayoshi Takahashi
- 3. Microbubble Collapse Physical stimulus Nano-bubble production by collapsing microbubble Radical generation OH Decomposition of organic chemicals Waste water treatment Physical stimulus Nanobubble production Collapse Microbubble with salt (electrolytes) Nano-bubble OH 鐚
- 5. Analysis of nano-bubble by Dynamic light scattering (DLS) 0 2 4 6 8 10 12 14 16 18 20 76 93 113 138 168 204 249 304 370 Particle size (nm) 鐚
- 6. Microbubble 10 鐔30亮m Nano-bubble < 200nm The deference of size between MB and NB 鐚
- 7. Shrinking Disappear Several minutes Several months Microbubble Nanobubble Continue The deference of life time between MB and NB Why ? 鐚
- 8. Movement of microbubbles in electrophoresis cell Light Microscope Electrode Electrophoresis cell Water + microbubble Electrode ( + ) ( +) 鐚
- 9. time 龍potential鐚mV鐚 Change in 龍 potential of microbubble over time Diameter 鐚亮m鐚 0 5 10 15 20 25 30 -20 -30 -40 -50 -60 -70 -80 Accumulation of surrounding ions Ions Microbubble time Ions 鐚鐚 with salt (electrolytes)
- 10. Aqueous solution Nano-bubble 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 鐚 Stabilization mechanism of nanobubble (assumption) Negatively charged Surrounded by accumulated ions (counter ions) Prevention of gas dispersion Salting out 鐚鐚
- 12. Normal ozone water vs. Ozone nano-bubble Ozone water ; disinfection & sterilizing 鐚Food industry, medical 鐚 1 hour 100 days Bubbling Micro-bubble Nano-bubble 0.1mg/L 1.5mg/L 1.5mg/L More than 1.0mg/L Ozone Normal method Nano-bubble Collapse 13
- 13. Oyster Norovirus Norovirus symptoms: vomiting, diarrhea, a low-grade fever, chills, headache, muscle aches During cultivation How to treat the problem of norovirusHow to treat the problem of norovirus 14
- 14. Chlorine ( high concentration ) ----- not good for foods Chlorine Norovirus Conventional method Oyster Ozone water Oyster Ozone = strong oxidation ability Virus inactivation Norovirus 15
- 15. Oysters in ozone nanobuble water for 1 day 16
- 16. Before ozone nanobubble treatment 17
- 17. More than 99% of feline calicivirus in the body --- inactivated After ozone nanobubble treatment 18
- 18. Practical method for inactivation of norovirus by ozone nano-bubble 19
- 19. Carps : recovering from Carp herpes ( serious disease ) Active effect for fishes 20
- 20. Oxidation ability of ozone nano-bubble as a form of mist 21
- 21. more than 80% of original oxidation ability reduction of smell and bacteria from atmospheres 22
- 22. Oxygen nanobubble Collapse of oxygen microbubble About 1% salt Recovery of weakened fishes Active effect for creatures 23
- 24. Orchid in oxygen NB water for more than 1 month Astonishing effects on plant Still alive 25
- 25. Tap water Oxygen nano-bubble water White radish Broccoli Broccoli White radish Initial growth of plants 26
- 26. Active effect for oysters -20 for 1 day in oxygen NB Room temperature After 1 hour Still alive 27
- 27. control TNF alpha With oxygen nanobubble control TNF alpha Prevention of arteriosclerosis (hardening of blood vessel ) Oxygen nanobubble inhibits mRNA expression induced by TNF留 in RAOECs ICAM1 VCAM1 GAPDH Department of Cardiology, Jichi Medical University Application of nanobubble in medicine Culture aorta endothelium of rat Cytokine stimulation鐚TNF alpha鐚 Heart attack Stroke 28
- 28. Vagus nerve of rat : after 1 week Isotonic NaCl solution Oxygen nanobubble Tokyo Medical and Dental University Application of nanobubble in medicine Preservation of living tissue / organ 29
- 29. 30 Thank you very much