Bill Gates has been involved in various projects related to nanoemulsions and spray technology, particularly in the context of vaccine development and climate change mitigation.
Nanoemulsions for Vaccine Development
The Bill and Melinda Gates Foundation has provided funding to NanoBio Corp., a company that has developed a nanoemulsion technology for vaccine delivery. This technology has been used to develop intranasal vaccines for diseases such as respiratory syncytial virus (RSV). The Gates Foundation granted $6 million to NanoBio Corp. to support the development of this vaccine.
Spray Technology for Climate Change Mitigation
Bill Gates has also been involved in a project to develop a technology that involves spraying particles into the stratosphere to reflect sunlight and mitigate climate change. This project, known as the Stratospheric Controlled Perturbation Experiment (SCoPEx), aims to test the feasibility of releasing calcium carbonate (CaCO3) dust into the stratosphere to cool the planet.
Concerns and Risks Associated with SCoPEx
While the SCoPEx project has the potential to mitigate climate change, it also raises concerns about the potential risks and unintended consequences of such a large-scale geoengineering project. Some of the concerns include the potential impact on the ozone layer, changes to regional weather patterns, and the potential for conflicts over the use of such technology.
Is the AI Perfume Safe for Humans?
Bill Gates: The battle against mosquito-borne diseases may thus be entering a new era, where scent science and everyday hygiene converge to provide subtle but powerful protection. By making mosquito repellence effortless and integrated into routines we already do, this innovation could reshape prevention strategies, saving lives with nothing more complicated than soap and laundry detergent.
The Gates Notes article explores an innovative approach to combating mosquitoes using scent-based technology developed by a Swiss fragrance company, dsm-Firmenich. Mosquitoes are attracted to human odors, which makes some people more prone to bites, resulting in the transmission of deadly diseases like malaria and dengue. Traditional repellents such as DEET provide temporary protection but require frequent reapplication. dsm-firmenich aims to embed mosquito-repelling fragrances into everyday products like soaps and laundry detergents, providing ongoing protection without altering daily routines. Their research focuses on combinations of scent ingredients that repel mosquitoes or confuse their scent receptors while also appealing to human preferences for fresh, pleasant smells. Early tests show promising results, with some fragrances as effective as DEET. The challenge remains in creating long-lasting scent formulations that endure daily activities like handwashing and laundry. Supported by the Gates Foundation, this novel method could dramatically reduce disease spread in vulnerable populations by simplifying mosquito defense.
Harnessing the science of scent, @dsmfirmenich is on a mission to make repelling mosquitoes as easy as washing up in the morning. pic.twitter.com/eEXset2RO3
— Bill Gates (@BillGates) August 15, 2023
Studies on Repellent Controlled-Release Formulations
• Polymer microcapsules, polymer microporous formulations, polymermicelles, nanoemulsions, solid-lipid nanoparticles, liposomes, and cyclodextrins are used as new tools for mosquito-borne malaria control in outdoor environments.
• Mathematical modelling used for the release rate of repellents is discussed in depth, including the Higuchi, Korsmeyer-Peppas, Weibull models, and the recently developed Mapossa model.
Understanding the Controlled-Release Formulations:
Bill Gates and the organizations he supports, such as the Bill & Melinda Gates Foundation, have invested heavily in malaria control strategies. These strategies often involve innovative approaches to insecticide delivery, including controlled-release formulations. These formulations aim to improve the efficacy and longevity of repellents, reducing the need for frequent applications and potentially lowering the overall insecticide load in the environment. The formulations mentioned – polymer microcapsules, microporous formulations, micelles, nanoemulsions, solid-lipid nanoparticles, liposomes, and cyclodextrins – are all designed to encapsulate and slowly release the active repellent compound, such as DEET or other synthetic or natural repellents.
- Active Ingredient Toxicity: The primary concern regarding side effects stems from the active repellent itself. The toxicity profile of the repellent, whether DEET, picaridin, or a natural alternative, is the most significant factor.
- DEET: DEET is a widely used repellent, and its safety has been extensively studied. However, it can cause skin irritation in some individuals. In rare cases, high exposure has been linked to neurological effects, particularly in children. The controlled-release formulations aim to reduce the amount of DEET needed, potentially mitigating some of these risks, but the potential for exposure remains.
- Picaridin: Picaridin is another common repellent, generally considered to have a lower toxicity profile than DEET. It is less likely to cause skin irritation.
- Natural Repellents: Repellents derived from natural sources, such as essential oils (e.g., citronella, eucalyptus), may also cause skin irritation or allergic reactions in some individuals. The specific side effects depend on the active compounds and their concentrations.
- Formulation-Specific Side Effects: The controlled-release formulations themselves can also contribute to side effects.
- Skin Irritation: The polymers, lipids, or other materials used in the formulations may cause skin irritation or allergic reactions in sensitive individuals. This is particularly relevant in outdoor environments where exposure to sunlight, heat, and humidity can exacerbate skin reactions.
- Environmental Impact: The environmental impact of the formulation components is another concern. The polymers and other materials used in the formulations may persist in the environment and potentially affect non-target organisms. Biodegradability is an important consideration in the selection of these materials.
- Nanoparticle Toxicity: If nanoparticles are used (e.g., nanoemulsions, solid-lipid nanoparticles), there are concerns about their potential toxicity. The small size of nanoparticles allows them to penetrate tissues more easily, potentially leading to adverse effects. Research is ongoing to assess the safety of different nanoparticles used in these formulations.
- Exposure Pathways: The route of exposure is also important.
- Dermal Exposure: The primary route of exposure is through the skin. The controlled-release formulations are designed to be applied to the skin, so dermal exposure is expected.
- Inhalation: Inhalation of the repellent or formulation components is another potential route of exposure, especially if the formulations are sprayed or aerosolized.
- Ingestion: Accidental ingestion is a concern, particularly for children.
- Specific Formulation Types and Side Effects:
- Polymer Microcapsules and Microporous Formulations: These formulations may release the repellent slowly, reducing the risk of immediate high-dose exposure. However, the polymers themselves could cause skin irritation or, if they break down, release potentially harmful byproducts.
- Polymer Micelles, Nanoemulsions, Solid-Lipid Nanoparticles, and Liposomes: These formulations use nanoscale structures to encapsulate the repellent. The safety of these nanoparticles is an ongoing area of research. Potential concerns include the ability of nanoparticles to penetrate the skin and enter the bloodstream, leading to systemic effects.
- Cyclodextrins: Cyclodextrins are used to encapsulate the repellent and improve its stability and release characteristics. They are generally considered safe, but high concentrations could potentially cause skin irritation.
- Regulatory Considerations: The safety of these formulations is subject to regulatory oversight. Regulatory agencies, such as the Environmental Protection Agency (EPA) in the United States, evaluate the safety of pesticides and repellents before they are approved for use. These evaluations consider the toxicity of the active ingredient, the formulation components, and the potential for human and environmental exposure.
Ref:
- Environmental Protection Agency. “Pesticide Registration.” [https://www.epa.gov/pesticide-registration]
- World Health Organization. “Malaria.” [https://www.who.int/news-room/fact-sheets/detail/malaria]
- National Pesticide Information Center. “Repellents.” [http://npic.orst.edu/ingred/ptype/repel.html]
The Power of Scent in Mosquito Control: Osmo and AI-Driven Insect Control
Osmo, a Boston-based startup, is pioneering the digitization of scent using machine learning, neuroscience, chemistry, and engineering.
About Osmo
Launched in January 2023 with $60 million Series A funding led by Lux Capital and Google Ventures, Osmo fuses machine learning, data science, psychophysics, olfactory neuroscience, electrical engineering, and chemistry in a multi-disciplinary approach to digitizing scent. Osmo’s work is grounded in machine olfaction research that the team validated at Google Research, including a 2019 study that used Graph Neural Networks to predict the smell of a molecule from its structure. The company has begun work in the flavor and fragrance market to create a new generation of better, safer, environmentally-friendly aroma molecules. Over time, Osmo expects to work in domains such as public health and agriculture on solutions that help humans detect diseases earlier, track pandemics faster, grow more food, catch food spoilage, and ward off insects.
- Scent-driven pest control offers an eco-friendly alternative to harmful synthetic pesticides.
- Osmo integrates AI, neuroscience, and chemistry to digitize scent for insect control.
- Bill & Melinda Gates Foundation invests a total of $8.5 million, emphasizing public health impact.
- Scent-based solutions target insect pests causing $70 billion in U.S. crop losses annually.
- Machine learning evaluates billions of molecules rapidly to develop novel repellents and attractants.
- Osmo’s “map of odor” predicts scent perception for humans and insects, enabling precise molecule design.
- Mosquitoes rely heavily on their sense of smell to locate hosts, making scent a crucial factor in their behavior. This understanding is driving the development of innovative insect control methods.
In short:
Osmo, a machine olfaction startup, is at the forefront of this research. They are using an AI-enabled scent platform to discover and produce compounds that repel, attract, or destroy disease-carrying insects. Their work is supported by the Bill & Melinda Gates Foundation, which has provided both a grant and an equity investment. Osmo’s insect control platform leverages machine learning and generative AI to evaluate billions of molecules for their potential effectiveness and safety.
Companies and Initiatives in the Market
The Future of Scent-Based Mosquito Control
- Osmo: Osmo is developing AI-driven scent platforms to create insect repellents and attractants . They are working on a “map of odor” to predict how molecules smell to humans and insects.
- dsm-firmenich: This company is partnering with the Bill & Melinda Gates Foundation on a research project to add mosquito-repellent scents to everyday household objects like bar soap and laundry detergent .
- SC Johnson: SC Johnson, the maker of Raid, OFF!, and Baygon, has been working for over 65 years to protect families from insect-borne diseases. They have developed spatial repellent tools like Guardian™ and Mosquito Shield™ . SC Johnson also has a “Base of the Pyramid Group” focused on helping vulnerable populations fight mosquito-borne diseases
The Future of Scent-Based Mosquito Control
The use of scent in pest control is environmentally friendly and highly targeted. Scent-based methods can reduce reliance on chemical pesticides and help maintain ecological balance. The development of cheaper, more effective, and safer insect repellents could have a huge impact on global health.
Ref:
- Osmo Receives $8.5 million in Funding to Support Advancement in AI-Enabled Insect Control. [https://www.osmo.ai/blog/osmo-receives-8-5-million-in-funding-to-support-advancement-in-ai-enabled-insect-control]
- Osmo Gains Another $3.5M from Gates Foundation to Advance AI-Driven Insect Control Using Scents. [Osmo Gains Another $3.5M from Gates Foundation to Advance AI-Driven Insect Control Using Scents]
- Fighting Malaria with the Power of Perfumery. [https://our-company.dsm-firmenich.com/en/our-company/news/our-stories/2024/fighting-malaria-with-the-power-of-perfumery.html ]
Bill Gates reveals ‘noise cancelling for your nose’ fragrance that can stop foul stenches by blocking odour receptors
Scientists at Firmenich, a 120-year-old fragrance company, discovered that bad toilet odors are primarily made up of four chemical compounds: indole, butyric acid, p-cresol and dimethyl tri-sulfide.
- The fragrance blocks olfactory receptors that pick up on bad smells
- This works similarly to how noise-cancelling headphones block sounds
- To create the fragrance, however, they also had to create a ‘poo perfume’
Sick of stinky toilets, Bill Gates has funded the development of an odour-blocking perfume that smells like poop as part of an ambitious effort to develop stink-free toilets and improve poor sanitation across India and Africa.
Mosquito Protection Bar Soap
• Developed by dsm-firmenich to provide additional protection without adding new steps to daily routines.
• The soap, combined with bed nets, aims to significantly lower the risk of diseases like malaria and dengue.
• Making a bar soap that gives you all-day protection against mosquitoes is a lot more complex than just infusing it with citronella.
• Scientists in Geneva identified scent ingredients used in perfumes to repel mosquitoes.
• Some ingredients are true repellants, causing mosquitoes to fly in the opposite direction.
• Others block receptors in the mosquito’s brain that usually attract humans.
Citronella reaction
Question: 2/8/2024
An 11-year-old girl who was taking part in a dramatic presentation had her hair styled in a poorly ventilated room. The product used contained citronella in several forms (citronella, hydroxycitronella, geraniol) and also other fragrance/standard ingredients. She developed throat discomfort, itchy eyes, nausea, and then vomited. This was very unusual as she has not vomited in many years, and does not have an easy gag reflex. Has been observed to have irritant contact dermatitis to bandage adhesive. Has been skin and sIgE negative to latex, based on parent concerns in the past. Skin test negative to common inhalant allergens, no asthma history. Can this be presumed as an intense indoor exposure to strong fragrance or is there possibly an allergic basis for inhalation of citronella causing reaction?
Answer:
Citronella is an essential oil extracted from Cymbopogon nardus native to Indonesia . It is a complex mixture of R citronella (major component), neryl acetate, citronellyl acetate, geraniol and β-citronellol. The oil is said to have relaxing effects when inhaled. Animal experiments show that regular inhalation can result in weight reduction, possibly due to adrenergic stimulation (1). Citronellal and β-citronellol are known contact allergens with contact dermatitis associated with dermal exposure. Contact reactions due to inhalation have not been described. Up to 4% of the adult population may show fragrance contact sensitivity, including to over 85 essential oils, and in referral clinics fragrance contact allergy may occur in up to 20% of patients(2,3). Aromatics could stimulate neural responses due to odor and these could include laryngeal discomfort, laryngeal spasm and possibly nausea, rhinorrhea or epiphora. I do not think these responses would be related to immune response, either humoral/IgE or cellular.
In my opinion, this is likely a neural reflex response and not an immunologic or allergic reaction. I would be comfortable with use of citronella in future in well ventilated areas. I do not think patch testing to fragrances in general or citronella in particular is indicated.
ref: https://www.aaaai.org/allergist-resources/ask-the-expert/answers/2024/citronella
Natural Remedies for Mosquito Repellent
Essential Oils
Mosquitoes are attracted to scent, light, heat, and humidity, making some individuals more prone to bites than others. Fortunately, there are natural alternatives to DEET-based repellents, which can have potential health and environmental drawbacks. These natural options are particularly suitable for children, who are more sensitive to chemicals.
Many essential oils are known for their mosquito-repelling properties. These oils work by masking the odors that attract mosquitoes, such as sweat and body odor.
- Lemon Eucalyptus Oil: The Centers for Disease Control and Prevention (CDC) has approved lemon eucalyptus oil as an effective ingredient in mosquito repellent. You can create a DIY mixture using 1 part lemon eucalyptus oil to 10 parts sunflower oil or witch hazel, but avoid using it on children under 3 years old.
- Lavender: Crushed lavender flowers produce a fragrance and oil that can repel mosquitoes. Lavender also has analgesic, antifungal, and antiseptic qualities, which can soothe the skin.
- You can grow lavender and apply the oil to bite-sensitive areas.
- Cinnamon Oil: Cinnamon oil can kill mosquito eggs and repel adult mosquitoes, particularly the Asian tiger mosquito. A diluted 1 percent solution can be sprayed on skin, clothing, and around the home.
- Thyme Oil: Thyme oil is effective against malarial mosquitoes. You can combine 4 drops of thyme oil with a base oil like olive or jojoba oil, or mix 5 drops with 2 ounces of water for a spray.
- Citronella: Citronella is a common and effective essential oil derived from a mix of herbs. Citronella candles can provide extra protection outdoors.
- Tea Tree Oil: Tea tree oil has antiseptic, antimicrobial, and anti-inflammatory properties and may act as an effective insect repellent.
- Geraniol: Geraniol, derived from plant oils like citronella and lemongrass, is effective for 2 to 4 hours. Avoid using it if you have sensitive skin.
- Peppermint Oil: Peppermint oil is a natural ingredient with minimal risks, and may be useful in repelling several insects, such as mosquitoes, ants, flies, and lice, among others.
- Rosemary Oil: The scent of rosemary repels mosquitoes, flies, and cabbage moths.
Planting certain plants in your yard can help deter mosquitoes.
Plants That Repel Mosquitoes
Important Note: Essential oils should always be diluted in a carrier oil before applying them to the skin. A general recipe is 3 to 5 drops of essential oil in 1 ounce of carrier oil. Always conduct a patch test to check for allergic reactions.
Other Natural Remedies
- Citronella Grass: Citronella grass is a classic natural mosquito repellent.
- Lavender: Lavender is effective at repelling mosquitoes.
- Marigold: Marigolds deter mosquitoes with their scent.
- Basil: The strong scent of basil repels mosquitoes and flies.
- Rosemary: Rosemary repels mosquitoes, flies, and cabbage moths.
- Lemon Balm: Lemon balm may have insect-repellent properties.
- Catnip: Catnip produces chemicals that repel mosquitoes, flies, and roaches.
- Chrysanthemum: Chrysanthemums contain pyrethrum, a natural insecticide that repels and can kill bugs like mosquitoes.
- Garlic: The scent of garlic on your skin is effective at repelling mosquitoes.
- Mint: Mint plants are known for their insect-repelling properties and can be used to keep mosquitoes and other insects at bay.
Homemade Bug Spray Recipes
- Apple Cider Vinegar: Some people claim that rubbing apple cider vinegar on your skin repels insects.
- Garlic: Some people take garlic tablets or rub garlic juice directly on their skin.
- Coffee Grounds: Sprinkling coffee grounds in puddles can curb mosquito breeding.
- Onions: The strong odor of onions acts as a natural mosquito repellent.
- Coconut Peppermint Mosquito Repellent: Mix 1/3 cup coconut oil and 15 drops of peppermint essential oil in a jar.
- Rosemary Mosquito Repellent: Combine 1/4 cup apple cider vinegar, 1/4 cup water, and 40 drops of rosemary oil in a spray bottle.
- Eucalyptus Mosquito Repellent: Combine 1/3 cup witch hazel and 1/3 cup water with 40 drops of eucalyptus essential oil.
- Easy and Natural Mosquito Repellent for Skin: Mix 1 part oil of lemon eucalyptus or lavender essential oil with 10 parts witch hazel in a glass spray bottle.
- Indoor and Outdoor Bug Spray: Mix 10 to 20 drops each of lavender, oil of lemon eucalyptus, and citronella essential oils with 2 ounces of distilled water and 2 ounces of white vinegar in a glass spray bottle.
Additional Tips
The most effective natural remedies for mosquito repellent include: lemon eucalyptus oil, lavender, cinnamon oil, thyme oil, citronella, and peppermint oil.
- Wear light-colored, loose-fitting clothing.
- Avoid being outdoors at dusk and dawn.
- Eliminate standing water.
- Use citronella candles.
- Get rid of standing water in gutters, birdbaths, planters, pots, and wheelbarrows.
Ref:
- Kinds of Natural Mosquito Repellant. [https://www.healthline.com/health/kinds-of-natural-mosquito-repellant]
- DIY Mosquito Repellent. [https://www.marthastewart.com/diy-mosquito-repellent-7485823]
- Preventing Mosquito Bites: The Best Repellents and Natural Solutions. [https://www.brownhealth.org/be-well/preventing-mosquito-bites-best-repellents-and-natural-solutions]
- Natural Mosquito Repellents Video. [https://naturalawn.com/lawn-care-tips/natural-mosquito-repellents-video]
- 10 Natural Ingredients That Repel Mosquitos. [https://www.parashospitals.com/blogs/10-natural-ingredients-that-repel-mosquitos]
- Homemade Bug Spray. [https://www.healthline.com/health/homemade-bug-spray]
- 10 Home Remedies For Mosquito Control – Natural Ways That Work!. [https://www.mrmr.biz/10-home-remedies-for-mosquito-control-natural-ways-that-work/]
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