Presentation on theme: "Nanotechnology in Agriculture Group 1: Amy Cornforth Tony Grupp Ana D’Almeida March 26, 2010."— Presentation transcript:
Nanotechnology in Agriculture Group 1: Amy Cornforth Tony Grupp Ana D’Almeida March 26, 2010
Food and Agriculture Issues Ability to track products, nutrient levels, and other information necessary to increase productivity Decontamination of soils and water Protection against pests and diseases
Topic Overview 3 Areas of Nanotechnology Development in Agriculture: –Nanobarcodes –Applications and Pesticide Remediation –Pesticide Delivery
Nanobarcodes – What are they? Offers a way to “tag” any type of organic or non-organic like a UPC code Typically uses gold and silver as the detecting strips, but platinum, palladium nickel, and cobalt have been used Can easily be read with an electronic scanning device or microscope Made through nanoscale electroplating of the metals into desired patterns Image at PennSt. University website:
How are Nanobarcodes made? Current technology uses metallized templates which can be dissolved away Depending on the order of electroplating a very wide variety of combinations can be made. Some examples are shown here Images from: 0For%20Agriculture%20And%20Food%20Systems%20_%20A%20View.pdf 0For%20Agriculture%20And%20Food%20Systems%20_%20A%20View.pdf
Slide taken from Oxonica presentation found at:
Two Types of Nanobarcodes Metallic Stripes or Discs? Sizes range from nm in length, nm in diameter Uses electroplated bars Viewed using a scanner producing blue light Proven to be highly accurate Can be grown to 12 μm in length Uses up to 10 disc pairs of metals, resulting in up to 287 different nanodisc codes Viewed using a special laser beam No current data on accuracy Image on left: Image on right:
Applications of Nanobarcodes DNA nanobarcoding for pathogen detection (such as Ebola and SARS) Monitoring of bacterial systems Can be used as a “nano- sensor” to detect water levels, soil nutrient information, and chemical levels Tagging food packages –Temperature changes –Pathogens –Leaks Biomolecular tracing Maximizes productivity Image at:
Dr. Dan Luo – Cornell University One of the earliest researchers of nanobarcodes First paper describing the use of nanobarcoding produced in early 2005 Runs LuoLabs, which works with various nanotechnologies geared towards DNA research –Works with 2 other professors, 6 post-docs, and nearly a dozen other PhD and Masters students Has won numerous awards and research grants
Further Research Currently no information about pricing or risk analysis Most research is gearing towards the medical community, with applications that can be used in agriculture, especially packaging and husbandry Current pathology detection systems can only detect up to 8 pathogens simultaneously. That range is attempting to be increased to over 20
Atomically modified seeds Experiment by ETC group that aimed to the characteristics of local rice varieties. Hole was drilled on the membrane of a rice cell and a N 2 atom was introduced to stimulate rearrangement of rice’s DNA. Nanotechnology Applications
Researchers have been able to alter the color of the rice from purple to green Goal of the research is to develop a variety of rice that can be grown all year long Rice variety with shorter stems and improved grain color Nanotechnology Applications Atomically modified seeds
Nanotechnology Advantages Possibility to fabricate sensors to monitor pathogens on crops and measure their productivity. Disadvantages Increase the ability of potentially toxic substances to penetrate deep layers of the soil and travel large distances.
Nanotechnology Current status Still in early stages of development Some of the new developed tools may not be viable Interdisciplinary study Future Trends Develop to produce validated technologies Chances for job creation Chances to become the next technological revolution
Experiment Domestic water filter that uses metal nanoparticles to remove dissolved pesticide residues is about to enter the Indian market. Developed at at the Indian Institute of Technology (IIT) in Chennai Tested for over six months Resulted from research on chemistry of nanopartiles Image at:http://www.nanowerk.com/news/newsid=1806.php
Endosulfan Stable pesticide and its frequently found on soils Has the potential to cause health problems including, genetic disorders Can be detected in ppm levels using gold nanoparticles Is adsorbed on to the nanoparticles surface After long interaction, nanoparticles precipitate from the solution. can be detected and selectively extracted by nobel metal nanoparticles Process can be used for field detection Scaled up for environmental decontamination Drinking water purification
Experiment Gold(silver) nanoparticles were prepared Gold solution –wine red Yellow solution-silver Endolsulfan solution was prepared Solution were mixed and stablized with citrate Set of solution with different concentrations of endosulfan were prepared UV spectra was taken Nanoparticles did not participate after the reaction for a period of nine hours A- pure citrate B,C, D 2, 10, 100 ppm Published in: J. Environ. Monit., 2003, 5, , DOI: /b300107e Image at: rticleForFree.cfm?doi=b300107e&JournalCode=EM
2,10,150, 200 ppm endosulfan Absorbances recorded after 9 h of addition of endosulfan Plasmon at 524 nm decreases in intensity after 3h addition, Additional peaks occur at longer wave lengths Dampening and shifting of the plasmon indicates binding on the nanoparticle surface. Published in: J. Environ. Monit., 2003, 5, , DOI: /b300107e
a) original naparticle solution b) 3h after addition of endosulfan c to t) 20 min intervals after addition As the concentration increases : red shift becomes more pronounce Intensity of color change is quantitave, can be detected by colorimetric methods Peak at 524 nm decrease intensity and a new peak emerges at 624 nm new peak intensity increases accompanied by further shift. The shift can be attributed to adsorption of on the surface of gold nanoparticles. After 9 h, the solution becomes bluish and the material begins to settle down. The residue is removed by centrifugation. Published in: J. Environ. Monit., 2003, 5, , DOI: /b300107e Image at: rticleForFree.cfm?doi=b300107e&JournalCode=EM
Silver nanoparticles a) pure cluster b) 2 ppm c) 10 ppm d) 100 ppm e) 250 ppm Bluish material was analyzed by FT- IR a) Pure endosulfan b)Endolsulfan after adsorption to gold particles (broad dands) c) Endolsulfanafter reaction with silver( similar to A) Published in: J. Environ. Monit., 2003, 5, , DOI: /b300107e Image at: rticleForFree.cfm?doi=b300107e&JournalCode=EM
Better approach to apply technology to the field is to use nanoparticle films. Gold nanoparticle film by layer-layer assembly on SnO 2 coated conducting glass plates. Published in: J. Environ. Monit., 2003, 5, , DOI: /b300107e Image at: rticleForFree.cfm?doi=b300107e&JournalCode=EM
Adsorption occurs at 525nm. Band at 609 nm due to electronic interaction of particles.(Occurs after formation of second layer) Layer exposed to endosulfan for 10 h Red shift observed ( 14 nm difference) Film changes color. Intensity increases because due to intercalation of endosulfan into the bulk of the film leading to substituition of some of the components. Published in: J. Environ. Monit., 2003, 5, , DOI: /b300107e Image at: rticleForFree.cfm?doi=b300107e&JournalCode=EM
Introduction to Pesticide Delivery Found at:
Design of Pheromone Releasing Fibers for Plant Protection Published in: Christoph Hellmann, Andreas Greiner and Joachim H. Wendorff; Polym. Adv. Technol. 2009, DOI: /pat.1532 Copyright John Wiley and Sons, Ltd. Pests negatively affect harvests –Amount –Quality Pesticides, insecticides, herbicides, and fungicides are traditionally used to aid in plant growth –Use is restricted due to possible environmental damages Photo:
Design of Pheromone Releasing Fibers for Plant Protection Published in: Christoph Hellmann, Andreas Greiner and Joachim H. Wendorff; Polym. Adv. Technol. 2009, DOI: /pat.1532 Copyright John Wiley and Sons, Ltd. Alternative: Use pheromones to counteract insect damage Pheromones are used by insects to transmit messages –Mating pheromones are the most related to plant protection –Can use mating pheromones to trap insects or disrupt mating patterns Advantages: –Can use pheromones selectively
Design of Pheromone Releasing Fibers for Plant Protection Published in: Christoph Hellmann, Andreas Greiner and Joachim H. Wendorff; Polym. Adv. Technol. 2009, DOI: /pat.1532 Copyright John Wiley and Sons, Ltd. Current spread of pheromones is done by mechanical means –Spraying –Dispensers Dispensers are used in vineyards –European grape berry moth Photo:
Design of Pheromone Releasing Fibers for Plant Protection Published in: Christoph Hellmann, Andreas Greiner and Joachim H. Wendorff; Polym. Adv. Technol. 2009, DOI: /pat.1532 Copyright John Wiley and Sons, Ltd. Problems with mechanical means of distribution –Strong concentration required –Sensitive to wind and rain –Uneven distribution (Dispensers)
Design of Pheromone Releasing Fibers for Plant Protection Published in: Christoph Hellmann, Andreas Greiner and Joachim H. Wendorff; Polym. Adv. Technol. 2009, DOI: /pat.1532 Copyright John Wiley and Sons, Ltd. Use nanofiber webs to hold pheromones –Protection from wind and rain –Continued, controlled release –Very even distribution Webs are produced by electrospinning Photo:
Electrospinning Via: Related to electrostatic spraying –Use a charged liquid and electrode to make an electric field –Liquid surface tension competes with electric field –Taylor cone describes the behavior of liquid with different voltages –Polymers produce fibers rather than droplets due to chain entanglements Photo:http://www.gwu.edu/~vertes/Resources/Electros prayPDA5.gif
Electrospinning Via: a) Electrospinning device b) Typical electrospun fibers
Experiment Pheromone (Z)-9-dodecenyl acetate –Disrupts the European grape berry moth Added pheromone to spinning solution in varying concentrations –Polyamide 6 and Formic acid –Cellulose acetate Published in: Christoph Hellmann, Andreas Greiner and Joachim H. Wendorff; Polym. Adv. Technol. 2009, DOI: /pat.1532 Copyright John Wiley and Sons, Ltd.
Experiment a) Polyamide 6 fiber without pheromone b)Polyamide 6 fiber with pheromone Published in: Christoph Hellmann, Andreas Greiner and Joachim H. Wendorff; Polym. Adv. Technol. 2009, DOI: /pat.1532 Copyright John Wiley and Sons, Ltd.
Experiment Cellulose acetate fibers of varying pheromone concentrations Published in: Christoph Hellmann, Andreas Greiner and Joachim H. Wendorff; Polym. Adv. Technol. 2009, DOI: /pat.1532 Copyright John Wiley and Sons, Ltd.
Pheromone release Approximately linear PA fiber release faster than CA release CA release possibly as long as 100 days Published in: Christoph Hellmann, Andreas Greiner and Joachim H. Wendorff; Polym. Adv. Technol. 2009, DOI: /pat.1532 Copyright John Wiley and Sons, Ltd.
Published in: DOI: /pat.1532 Copyright John Wiley and Sons, Ltd. See previous slide for addt'l information.
Summary of Experiment Promising work Needs careful consideration of carrier web material –Use fibers with long decomposition time –Use biodegradable fibers Multiple developments to reduce cost of electrospinning
Comments varied between positive and negative Group 1 agrees that a more normalized slide formatting would have helped, although the use of technical terms for experimental analysis was necessary. Due to a lack of data given by researching companies, and the present relevance of the information, it was logical to present the overall topic as three separate topics, and thus it was not required for one to be connected to the next. Group S1 Rebuttal
Group S2’s Evaluation of S1 Second Presentation Micheal Jones Rachel Houk Chris Heflin
Positive Aspects Oral presentation was up to par – Presenters were dressed professional – Most presenters were confident and concise Slide quality well formatted – Animation was helpful in understanding Introduction was informative – Set up the rest of the presentation nicely Question and answer session solidified presentation
Room for Improvement Use of filler words needs to be minimized. One of the presenters needed more preparation. The presentation was shorter than it initially was planned to be. A few slides contained too much information but overall the group performed well
Review of S1—Nanotechnology in Agriculture By S3: James Kancewick Michael Koetting Bradford Lamb
Review The first and third sections of the presentation were easy to understand and the speakers did a good job of explaining the material. The second section of the presentation (endosulfan experiment) was difficult to follow; the slides also contained numerous spelling and formatting errors, and the graphs were not labeled well. Endosulfan experiment should have been explained in layman’s terms instead of with purely scientific numbers and no explanation of the implications of the findings.
Review Text and graphics were occasionally too small. Applications of nanobarcodes in agriculture were not sufficiently detailed for this presentation’s topic. Slide formatting was sometimes haphazard; more parallel slide design would have made the presentation much more professional.
Joshua Moreno Danielle Miller Scott Marwil
Topic was very interesting The video in the slides was entertaining Everyone looked nice and professional Ana did especially well presenting The slide design looked professional and appealed to the audience since we are all Aggies
Slides were too cluttered Too much text- this made the font size small in some places and it was also distracting Layout of the slides- try to balance the space so as to please the eyes Instead of covering the background of the slides when you have giant pictures, change the layout to a blank slide or title slide so it looks more professional
Eliminate all spelling errors; these are unprofessional and easy to take care of Speak clear and pronounce words Would have been nice to see more vibrant colorful pictures Some slides seem to have more than one title? Indent bullets under there headings (advantages and disadvantages slide)
Group S5 REVIEW of Nanotechnology in Agriculture Group 5 Trevor Seidel Laura Young Pradip Rijal
Presentation Review The presentation had a good balance between graphics and words Some of the presenters were easy to understand while others were not as clear The presentation seemed did not flow from one section to the next making it hard to pay attention The introduction failed to tie the different topics together
Presentation Review The topics were not well connected or well developed, with the second topic containing far to many graphs making the presentation hard to follow Experiment detailed in slides should have come before its conclusions/summary in slides 14,15.
Nanotechnology in Agriculture (S1) Critique CHEN 481 Critique by S6: John Baumhardt Daniel Arnold Michael Trevathan Michael Tran
Review The slide templates looked professional. The colors used made the slides easy to read. The slides should be more uniform – the font, layout, text size all varied drastically from slide to slide. Good use of pictures, however there should have been more pictures and less text – we are too lazy to read. The text was too small on many of the slides to read from the back of the room. Make research graphs fill an entire slide and explain them more thoroughly – this is our first time seeing the graph.
Review Needed a better explanation of the benefits of red shift to the agriculture. The barcode section was off topic comparatively to the other sections. The crop improvement research needed a conclusion and application slide Good job using multiple articles that were broadly discussed – you were able to encompass more of the agriculture industry. Overall good technical presentation.
Review All the speakers spoke clearly and confidently. It appeared as though they had practiced prior to the presentation. Everyone dressed nicely and took the presentation seriously. Limited amount of filler words used. Great job orally. If you read off the slides use the monitor instead of the projector so you don’t turn your body away from the audience