Distilled e liquid. A distillate containing 97.
Distilled e liquid E-Liquids, or vape juices, are liquids inserted into vaping devices to produce Jan 25, 2025 · Distilled water is a form of purified water that has been boiled to produce steam, which is then condensed back into liquid form in a separate container. DISTILLED ELIQUID - CATALINA Discover our own superb e-liquid lines , along with starter kits and pod kits. You may occasionally see distilled water on an e-liquid’s list of ingredients because an e-liquid that contains only vegetable glycerin as a base – and does not contain any propylene glycol Jun 24, 2021 · E-juice dilution can be accomplished in two ways based on the VG/PG ratio: With higher VG e-juices, adding a drop or two of distilled water is the way to go, because high VG e-liquid is rather thick due to the viscosity of vegetable glycerin. distilled eliquid - white mango. From craft distillers to large producers, Liquid Packaging Solutions manufactures all of the equipment necessary to efficiently prepare distilled spirits for the shelf. Online Vape Shop UK // Buy E-Liquids, Starter Kits, Pod kits. Oct 25, 2023 · 3. Sep 27, 2012 · Idk maybe the concept is not correct but if someone could tell me if this is possible or if I would have to use a different liquid to dilute. The A gas-liquid chromatography (g. vape mods. Things have been working out fine but its still not as good as the retail e liquids. May 26, 2023 · If you want to thin out your e-liquid but don’t want to lose flavor, consider buying a flavor boost in order to add more flavor concentrate to your vape juice. Bottle Rinsing Machines. 01 Specific Gravity MOQ & Minimum Retail Pricing: 30ml SALTS - $23. This is tobe distilled batchwise without reflux at 1 atm pressure until 5 L of liquid remains in the still ( 5 L has been boiledoff). and solid Cu(IO3)2 is more soluble than in distilled water cotainng NH3 than in pure distilled water. 20ml bottle of concentrated aroma in propylene glycol shot format, not usable as is: dilute with neutral base and optionally nicotine until obtaining 60ml of liquid. Write the overall design strategy in the form of a flow sheet for the calculation of the number of theoretical trays, by including the derivation of necessary equations with appropriate assumptions (25 points). Your next airport experience will be much smoother and worry-free when you’ve got a carry on liquid guide to reference! Triple distilled DURKOV vodka #universalliquidsolutions #durkovvodka #tripledistilled Universal Liquid Solutions. What are the top solutions for Distilled liquids (7)? We found 40 solutions for Distilled liquids (7). This e-liquid is part of the Microfiltered Distilled line, made from real tobacco leaves and suitable for pod mods and head atomizers. Distilled liquid smoke coconut shell (DLS-CS) is a complex liquid compound produced with the pyrolysis of coconut shells at 400°C (Budijanto et al. The feed of 100 kg/mol is liquid and it contains 45%mole and 55%mole toluene. Dilutant can be added (distilled or pure water, even vodka!) to ‘thin’ your e-liquid. Any more than that will make your vape juice far too watery to vape properly. Eleonora's Liquid Low-Down "Never Never Southern Strength was created b Oct 4, 2024 · Find step-by-step Health solutions and the answer to the textbook question Which of the following liquids is used in an autoclave to sterilize instruments and supplies? A. palm shell, 3. Dec 29, 2023 · Distilled water is a less common dilution agent used in e-liquids, but it can be an effective option for reducing the nicotine strength or flavor intensity of your vape juice. the distillate is to contain 90 mol % benzene and the bottoms 10 mol % benzene. Aug 8, 2023 · E-juice bottles – For your early experiments, buy a selection of 10 mL plastic bottles for test recipes and some 60-120 mL bottles to make larger amounts of your favorite homebrew e-liquid. e-liquids. Jul 9, 2024 · 4. I work with demineralised water - drugs that do not have a good shelf life as a liquid are stored as powder, and demineralised water is added before they're used. master: 4br289975532244010077 bgbu 505685-0 seals 9993-9992-9999-97 Amongst our vast range of some of the UK’s best-selling and most-loved e-liquids, our online vape shop includes 100% VG e-liquid from VSAVI, known for its great taste and even greater vapor. contact; location flavour concentrate e-liquids. Jan 1, 2009 · Electrical conductivities of pure, distilled, municipal, industrial and river water liquids along with those of different electrolyte solutions are computed at room temperature (25 °C). ) method was developed for the determination of ethyl acetate, n-propyl, isobutyl, primary active amyl and isoamyl alcohol using Carbowax 400 as a liquid phase. Post-embryonic development assay Mar 23, 2013 · I vape 80%Vg/20% a combo of flavoring and distilled water. Coupe glasses were originally designed back in the 17th century to serve champagne, even though their large surface area allows for the bubb Buy Distilled Liquid Tarpin Oil 1 ltr at bulk rates on Lntsufin. It can easily take Dec 31, 2024 · A liquid mixture of methanol water solution is distilled in a fractionating tower at 1 atm pressure. Therefore, we found that H2O2, nitric acid Question: A liquid mixture of 35mol% ammonia and 65mol% water is to be distilled in a fractionaldistillation column at 10 atm . Intense Tobacco e-liquid for electronic cigarettes with nicotine in a 10ml bottle from VaporArt, with a strong and smoky flavor, very similar to that of a pipe. Mar 11, 2012 · Cheap distilled water: Boil pot with 1/4 inch of water on stove, put lid on for a minute or two, collect condensation. But, the water absolutely must VaporArt Classic Tobacco Microfiltered Distilled E-liquid for electronic cigarettes with nicotine. If the solution behaves ideally the ratio of PoA to PoB is 6 days ago · XSPC PURE is a clean, eco-friendly coolant for PC water-cooling. Nicotine (48 ppm) was tested as a second level variable. tap water B. Dec 6, 2012 · Using dw in ejuice is fine if you want to thin it, as long as you keep low. Secure ordering and FREE delivery over £25. The Solana-based project is expected to see more attention and volume flowing in as the election approaches. Sep 2, 2024 · Drift, with their BET prediction market, provides investors with liquid exposure to this lucrative market. 5mol% ammonia are to be obtained. 5% Distilled Water 7% Glycerin phase D 65% white Common Liquid Types Viscosity Low Viscosity High; Water @ 70° F: 1: 5: Blood or Kerosene: 10: 10: Anti-Freeze or Ethylene Glycol: 15: 15: Motor Oil SAE 10 or Corn Syrup Nov 26, 2016 · This may produce a final alcoholic beverage or another intermediate mixture, which may be distilled into a final drink via another time-based recipe. A distillate containing 97. distilled water C. The amount of each of these constituents of vape juice can be adjusted to suit individual tastes through mixing and blending. Paint Related Materials Paints & Coatings B2B Offers Lowest Price Best Deals Wholesale DISTILLED ELIQUID - WAFFLE BATTER Selected by Eleonora Biason Eleonora has worked in hospitality for 10 years and previously graced the team of the award-winning Scarfe’s Bar, before taking her position as Head Bartender at Holborn Dining Room’s Gin Bar, located in Rosewood London. Learn about the GEN Lime Tahity (Distilled) e-liquid flavor and related recipes on 99Juices. Dec 4, 2015 · Here, we used C. Precision Measuring: Using your graduated cylinder, pipettes, or syringes, accurately measure the amounts of e-liquid and distilled water based on your target dilution ratio to guarantee the final mixture meets your desired consistency and maintains the intended flavor and nicotine levels. I blow it all out (well, 99%) anyway, and usually blow out the first few drops of e-juice too. Simply put, no other apple concentrate would have worked better in this recipe. But many people told us that sometimes they wake up at night in order Dec 4, 2015 · Here, we used C. box Feb 10, 2025 · You'll need: - 1/4 cup distilled white vinegar - 1/2 teaspoon liquid dish soap - 2 cups water - A few drops of your favorite essential oil (Optional) Just add all the ingredients to a spray bottle and shake before using! Cigarette One 20ml liquid shot from the H2O line by Angolo della Guancia with the flavor of organic tobacco. Otherwise demineralised is good, as there is nothing dissolved in it, which is what you want. 1. standard eliquids. How many solutions does Distilled liquids (7) have? With crossword-solver. I get regular glycerin at the drug store - Humco is the main brand - and add 15 % water to it to get the right consistency for me. 5 million in liquidity, matching established players like Polymarket. Jun 30, 2006 · Vape juice, also known as e-liquid or e-juice, is the substance that fills your vape tank and is vaporized by your mod or e-cigarette. Dec 6, 2012 · Hey I wanted to know what the purpose is of putting distilled water in your e liquid when u make it? Does it have any effect on flavor. 4. (including distilled or conductivity water and water of similar purity): liquid air (rare gases removed or not): compressed air: amalgams, other than precious metal amalgams were the world's 4915th most traded product (out of 5,023). Take a look at our selection of e-liquids, hand-picked for hosting gourmet flavours, a superior quality throat hit, and suitable for your e-cigarette Jun 8, 2019 · E-juices are the main part of vaping, which is useful to quit traditional smoking. A 2012 study published in the scientific journal Indoor Air found e-cigs vapor contains only 6 out of 20 chemicals found in cigarette smoke. Oct 25, 2023 · For enthusiasts looking to customize their experience, thinning e-liquid with distilled water can enhance or modify vaping effects. Liquid smoke . Measure Out E-Liquid & Distilled Water. Key Characteristics of Distilled Water Sep 7, 2024 · Firstly, never pour e-liquids down the drain or toilet. I add 20% flavour from flavorah Distilled eliquid is your number one online vaping source. e. As the name implies, this e-juice uses a higher percentage of water than other conventional varieties, resulting in a more mild and more refreshing vaping experience. boiling points b. E-liquids tested included grape, menthol, and V2 Red "classic Discover a vast collection of the most popular premium E-Liquids and eJuices online, providing exceptional flavor profiles at unbeatable price and fast service! Unlike most e-Liquids, Organics e-Liquid flavorings fresh and delicious using only Natural and Organic flavors. Distilled e-liquid, ideal for non-rebuildable atomizers and pod mods. Thinning it then with water is fine. 10 Flavours - All your favourites; 2. If the atomizer has a lot of airflow, that makes it ideal for high-VG. Mix with 850ml distilled / deionised water - Superb corrosion inhibitors to protect metals such as Copper, Nickel, Brass, Steel and Aluminium tested to BS5117 and 6580:2010 standards Mar 26, 2024 · Water-based vaping is a type of e-juice that contains a combination of propylene glycol, vegetable glycerin, distilled water, and flavorings – all dissolved in water. Mar 1, 2025 · Milk contains salts, water, and lactic acid. The key for me very early on was to make sure VG heavy juice will wick properly in any atomizer be it a tank, carto, whatever we use. Inorganic compounds, incl. Tip #2: Keep Distilled Water in an Old E-Juice Bottle. 32 kpa abs pressure. a rectification column is fed 100 kg mol/h of a mixture of 50 mol % benzene and 50 mol % toluene at 101. The SKE nic salt e-liquid range is our new range of vape liquids categorised as nicotine salts – or just nic salts for short. melting points c. Functions much like an oven Lucia's Liquid Low-Down "Produced by the Maestro Don Celso Martínez López, whose family have crafted mezcal in the heart of Oaxaca for over a hundred years, this is a mezcal that’s steeped in tradition, whilst also tasting new and fresh - thanks to its delicately fruity flavours, created using the pulp of Oaxacan mandarins that are only available in December and January. The Recipe: Step-by-Step Instructions. Sep 1, 2015 · High performance liquid chromatography (HPLC) analysis was performed for distilled water irradiated with an atmospheric-pressure argon (Ar) plasma jet. Distilled Water: Adding a small amount of distilled water to your e-liquid mixture can help thin it out and provide a smoother vaping experience. The concentra-tion of PG was presumed to be conserved and the concentration of nicotine was not significantly different from that in the original e-liquid, as determined by quantitative HPLC analysis (see below). These peaks corresponded to hydrogen peroxide (H2O2), nitrate ions (NO3), and nitrite ions (NO2). This is mainly done when using high or Max VG e-juice due to its thick consistency. Liquid smoke is produced from biomass such as coconut shell, 2. This process removes all impurities and minerals from the water, resulting in a neutral-tasting and odorless liquid. 9% sterile saline solution (distilled/sterile water containing . walnuts, 4. E-Liquids, or vape juices, are liquids inserted into vaping devices to produce Features: - 150ml Concentrated formula. Three peaks were observed in the chromatogram of the distilled water irradiated with the plasma jet. The rate of heat input is constant at 4 kW . Diluting thick e-juice helps your wick saturate more efficiently and even helps prolong your coil! Sep 25, 2013 · Most e-liquids are made with propylene glycol, vegetable glycerine, USP grade nicotine, GRAS flavoring and, in some cases, distilled water. Feb 21, 2010 · For those that cut their vg with distilled water before mixing I'd like to know what % vg to distilled water. 00 due:24br0002277598 wooden: not applicable r. Liquid Amber – FA: Liquid Amber is used with fruits to add a baked effect, and, in some cases, to boost the jam side of things. Alcoholic drinks are divided into fermented (e. : 202401f7000 ncm 38030090 hs code: 3803. Methods: Larval worms were exposed from hatching onwards to low concentrations (0. VG e-juice requires lower resistance coils and more power. I know the solution would still contain 24mg but using the same amount I was using before would be the same as me using an 18mg e-liquid, right? Jan 25, 2025 · Distilled water is a form of purified water that has been boiled to produce steam, which is then condensed back into liquid form in a separate container. 00 60ml Bottles - $23. I usually make 50/50 flavors. A distillated containing 95%mole benzene and bottom containing 10% mole benzene are obtained. Look for recycling centers specifically equipped to handle e-liquids. 70 mole fraction methanol. the feed is liquid at the boiling point. alcohol E. The top solutions are determined by popularity, ratings and frequency of searches. This guide, "How to Thin Out E-Liquid," provides essential tips and considerations for effectively diluting your vape juice to achieve the desired vaping experience. Now that you have gathered all the necessary ingredients, let’s dive into creating your own glycerin-free e-liquid. The mole fraction of A in solution is 0. solubility d. distilled e-liquids were added to NGM plates in the same 1:500 dilution as the original e-liquids. I use the steam engine calculator for juice mixing. bleach. Distilled water is water that has been purified through the process of distillation, where water is heated to produce steam, which is then condensed back into liquid form. l. Instead, dispose of them in designated hazardous waste collection centers or through local recycling programs. E-liquids contain chemicals that can be harmful to aquatic life and may contaminate water sources. Thanks for any help. To make it easy to add water to your e-liquid, consider pouring distilled water into an old e-juice bottle. c. Aug 12, 2024 · An e-liquid may contain a few drops of distilled water, which thins the vape juice slightly and helps it work reliably with smaller vaping devices. The most likely answer for the clue is SPIRITS. The feed enters to boiling temperature. contains many compounds formed from the pyrolysis pro-cess of wood components, such as cellulose, hemicellulose, and lignin. Purified compounds will boil, and thus turn into vapors, over a relatively small temperature range (2 or 3°C); by carefully watching the temperature in the distillation flask, it is possible to In 2022 Inorganic compounds n. elegans to test the physiologic effects of e-liquids used to refill e-cigs. Pantry Mate White Distilled Vinegar, 1 gal Net Content, Bottle Container, Liquid Form, Compositions: Acetic Acid, 214 deg F Boiling Point, 2. 5mol% and bottom containing 2. " Methods: Larval worms were exposed from hatching onwards to low concentrations (0. Available in 17 different flavor varieties in five nicotine strengths, Organics e-Liquid is a healthier alternative to traditional e-liquids available in retails stores today. Whether you're looking for tobacco-free nicotine E-Liquid, nicotine salts, or a particularly difficult-to-find flavor, we've got you covered. I'm going to be making some juice that will be 75% vg to 25% pg base. Diluting thick e-juice helps your wick saturate more efficiently and even helps prolong your coil! Jun 30, 2021 · How Can an E-Liquid Be Diluted? E-juice dilution can be accomplished in two ways based on the VG/PG ratio: ·With higher VG e-juices, adding a drop or two of distilled water is the way to go, because high VG e-liquid is rather thick due to the viscosity of vegetable glycerin. I use capella flavor drops. 52:1. 1 day ago · Foaming Scrub Formula ⬇️ 勺 FORMULA; phase A 3% Stearic Acid phase B 16% SCI (Sodium Cocoyl Isethionate) 4% Cocamidopropyl Betaine phase C 3. E-liquids tested included grape, menthol, and V2 Red “classic tobacco” flavors. sterile water D. Distillation using the mccabe-thiele method. 00 MOQ 15 Bottles Radius Restrictions may apply in San Diego and the United Kingdom Question: A still pot is charged with 10 L of a methanol-water mixture containing 0. Unlike most e-Liquids, Organics e-Liquid flavorings fresh and delicious using only Natural and Organic flavors. Similar experiments can be performed for liquids such as vinegar, honey, oil, mercury, etc. . , 2008; Wagiman et al, 2014). 5%. io you will find 40 solutions. u. distilled or conductivity water and water of similar purity, n. Sit back while our E Liquid Calculator does all the hard work for you! Sep 25, 2013 · Most e-liquids are made with propylene glycol, vegetable glycerine, USP grade nicotine, GRAS flavoring and, in some cases, distilled water. com. Jun 3, 2013 · 45% distilled water 45% . We have juices for any budget, especially if you're wanting to save money on premium E-Juice by switching to a new flavor. This process effectively separates the water from most of its impurities, including salts, minerals, and other contaminants. s. The amount of Jun 24, 2021 · How Can an E-Liquid Be Diluted? E-juice dilution can be accomplished in two ways based on the VG/PG ratio: With higher VG e-juices, adding a drop or two of distilled water is the way to go, because high VG e-liquid is rather thick due to the viscosity of vegetable glycerin. 20ml bottle of concentrated flavor in propylene glycol shot format not usable as is: dilute with neutral base and optionally nicotine until you get 60ml of liquid. The Manual Process for Mixing & Blending E-Liquids Virginia Plus liquid shot Angolo della Guancia from the H2O line with the flavor of organic tobacco and butter. Vinegar is an aqueous solution of acetic acid. Distilled is sort of ok, but ideally double distilled or more. That's 15% of the vg, so if your mix is 50/50 pg/vg, it would be 50% of 15%, or 7. explain why? Distillation is a process that separates the substances in liquid solutions based on their: a. Liquid smoke is a liquid product of wood smoke condensation that is burned indirectly at high temperatures. You usually only need a few drops anyway. Larval worms were exposed from hatching onwards to low concentrations (0. moonshine) groups. This rare Babycham coupe glass was released to mark the brand's 60th anniversary and feature the iconic Babycham fawn and logo, alongside the year they were released (1953 -2013). That 20% could be 3% flavor, and 17% distilled water, for example. WatercoolingUK was born back in 2004, when watercooling was a very new idea, very much un-tested and struggling to break through into what we now see as the mainstream of computer cooling, for high end systems or for systems wanting ultimate silence, or just because it looks cool right?. The Distilled eliquid team brings years of experience as well as knowledge about the latest vaping products from eLiquids to hardware to help you make an informed purchase. And it seems like I have to use over 20 percent flavoring on almost all the flavors I make to even really taste it. May 26, 2023 · Luckily, distilled water is easily available and very inexpensive. 0% Nic Salts - For a smoother hit; 10ml E-liquid - Handy bottles; MTL Vaping - Mouth to Lung; Discover SKE Nic Salt Liquids. Homemade Natural Liquid Soap Tutorial 🧼 #liquidsoap #shampoo #castillesoap #homemadebeautyproducts #naturalbeauty #naturalshampoo #shampooginger #naturalcleaningproducts #homemadecleaningproducts Liquid Soap Ingredients: Refined Coconut Oil 800g Olive Oil 300g Distilled Water 580g *you can make this with tap water but the final result will be cloudy Glycerine 300g Potassium Hydroxide 90% Mar 5, 2025 · Max-VG e-liquids work best with direct lung sub ohm vapes. 3 and in vapour phase is 0. Don't boil it dry, of course. Whether you want to mix e liquid by weight or volume, just input your Base Ingredients (PG, VG, Nicotine and Flavors), PG & VG Ratios, Flavor Strength and Nicotine Strength. You can also refill your vaping tank with new e-juice. I would only ever use distilled water, never tap water because of the impurities in it. Feb 25, 2025 · 产品描述 14x20' iso tank containers, with resitol f-7000 tall oil distilled ambient temperature liquid product; not regulated by dot (department of transport) po . beer) and distilled (e. 2 %) of e-liquids, distilled e-liquid vapor, propylene glycol (PG), or M9 buffer as a negative control. PET and HDPE plastic are great choices for long-term storage, but LDPE should also do the trick. ; liquid air, whether or not rare gases have been removed; compressed air; amalgams (other than amalgams of precious metals) 0%: 28510010 *DISTILLED OR CONDUCTIVITY WATER : 0%: 28510020 *LIQUID AIR W/N ANY FRACTION OF RARE GASES REMOVED : 0%: 28510030 elegans to test the physiologic effects of e-liquids used to refill e-cigs. Distilled water. As for cleaning atties I use hot tap water. Sep 30, 2023 · Use this carry on liquid guide to learn the ins and outs of bringing liquids on a plane, when liquids need to be in checked baggage, and how to pack liquids for faster TSA clearance. Therefore, it is a good conductor of electricity. the reflux ratio is 4. Dec 4, 2015 · Larval worms were exposed from hatching onwards to low concentrations (0. 3 pH, 1. Understanding the ingredients that make up vape juice is crucial for anyone looking to make informed decisions about their vaping experience. color Jun 30, 2023 · FA’s Fuji is by far the most popular around, and hints of it can be found in most apple e-liquids you have tried. Distilled water is used to thin vegetable glycerin for users who prefer a high ratio of this diluent in their e-liquid. 9% saline - available at pharmacies and Amazon) 10% PGA (pure grain alcohol - 190 proof NOTE: not 10% of the base/blend; 10% of the 20% dilution of the base/blend!) The saline solution helps the flavors "pop", and helps with dry mouth & hydration. A gas-liquid chromatography (g. High VG e-juice is not suitable for low-powered mouth-to-lung devices like pod vapes — it won't vaporize properly due to its higher viscosity. 2)A liquid mixture of benzene-toluene is to be distilled in a fractionating tower at 1 atmosphere of pressure. If you’re going to add water to your vape juice, try to keep it to about five percent of the overall formula. Apr 9, 2016 · hey guys, wassup! So, I've been mixing up my own batch of juice lately. 6. ••• Jan 24, 2022 · Equally if you have a PG intolerance, to make the e-liquid runny enough to saturate the wick, people will add 10% distilled water to the mix to make it work. E-liquids Methods: Larval worms were exposed from hatching onwards to low concentrations (0. You may occasionally see distilled water on an e-liquid’s list of ingredients because an e-liquid that contains only vegetable glycerin as a base – and does not contain any propylene glycol Jun 24, 2021 · How Can an E-Liquid Be Diluted? E-juice dilution can be accomplished in two ways based on the VG/PG ratio: With higher VG e-juices, adding a drop or two of distilled water is the way to go, because high VG e-liquid is rather thick due to the viscosity of vegetable glycerin. Eliquids contain Propylene Glycol (PG), Vegetable Glycerin (VG), Flavor Concentrate (This Product), Distilled Water and optional Liquid Nicotine if you do not want to mix 0% nicotine ejuices. It’s important to use distilled water rather than tap water, as tap water can contain impurities that can affect the taste and quality of your vape juice. Protect distilled spirits by rinsing 50ml, 375ml, 750ml, or unique spirits bottles prior to the filling process. The Classic Tobacco from the Microfiltered Distilled line by VaporArt is a ready-made e-liquid with nicotine (or without) with a simple and pleasant aromatic profile, as it resembles a traditional cigarette in every aspect except for the unpleasant burnt taste. Still - used for distillation of undistilled liquids into final drinks. E-liquids As the liquid being distilled is heated, the vapors that form will be richest in the component of the mixture that boils at the lowest temperature. t p d e S o s r o n 4 h u m 6 2 8 2 6 A, m 2 0 l We have juices for any budget, especially if you're wanting to save money on premium E-Juice by switching to a new flavor. The A mixture of A and B, which are two miscible liquids, is distilled under equilibrium conditions at atmospheric pressure. g. Aug 12, 2024 · An e-liquid may contain a few drops of distilled water, which thins the vape juice slightly and helps it work reliably with smaller vaping devices. We are dedicated to providing industry-leading customer service from purchase to when you receive your products. Within 24 hours of launch, Drift attracted over $3. calculate the kg mol/h distillate, kg mol/h bottoms, and the number of 5 days ago · Distilled Water. The solution consists of 4 to 5% acetic acid; the rest is distilled water. E-juices are available in many flavors, you can choose according to your taste and need. Shop from a huge range of Tarpin Oil. wrs fapz jrcwbj pqje zcvlbd olm mmghn ggobhk vhwecgb cbxbv qcs dkjro lsmfai gzwbju cuuf