Home

Zinc Dust near me

The Largest Single-Site Zinc Dust Plant in the World. Recent News. Prev. Next. Click to learn more We've Moved! We have moved our headquarters back to our original location on Esperson Street in Houston. Please update your records and if you have any questions email info@uszinc.com. U.S. Zinc 6020 Esperson Street Houston, TX 77011-233 U.S. Zinc is committed to a sustainable approach for our various zinc products: dust, oxide, metal and fines. We produce zinc dust from high-grade and special high-grade (SHG) zinc metal, as well as from zinc secondaries. To produce Type I zinc dust, we rely on bottom dross as a primary source of raw feed Zinc Lozenges at Walgreens. View current promotions and reviews of Zinc Lozenges and get free shipping at $35

Zinc Supplements at Walgreens. View current promotions and reviews of Zinc Supplements and get free shipping at $35 American Zinc Products is the only plant in the world that produces zinc solely from recycled sources. Through our process, we transform thousands of pounds of industrial byproduct materials into a valuable commodity that can be sold and reused to make thousands of construction and household products Our Recycling Facilities. When steel is recycled through electric arc furnaces, metal rich EAF dust is captured so that it doesn't get released into the air. Disposing of this dust isn't easy for steel makers—so that's where we come in. Our facilities receive and recycle EAF dust, reclaiming valuable metals for re-use TYPE: Single pack, premixed, ready-to-apply liquid organic zinc compound GENERAL PROPERTIES: ZRC® is a high-quality cold galvanizing compound based on a trade secret organic binder which affords true galvanic anti-corrosion protection to metals. The dried film of ZRC is 95% metallic zinc. Because of the uniqueness of the formulation, ZRC is the only coating of its type to be recognized under. Zinc dust, <10 μm, ≥98%; CAS Number: 7440-66-6; find Sigma-Aldrich-209988 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldric

U.S. Zin

What's near me? Brought to you by. Zinc Smelter along with 400 million pounds of zinc dust. Zinc ore was in high demand during World War I and fetched up to $112 per ton according to an August. Zinc-rich Galvax stops rust and corrosion caused by welding and atmospheric exposure. High percentage of pure zinc dust in an epoxy resin formulation produces a film providing years of protection. Electro-chemically bonds with iron and steel, and actually fuses with the base metal to provide rust and corrosion resistance Zinc Dust Zinc Oxide Zinc Sulfate Skyhawk Chemicals, Inc. For orders or information, call 713-957-2200 713-957-0345 (Fax) order@skyhawkchemicals.com 701 N. Post Oak Rd., Suite 540 Houston, TX 77024 See our Map. American Zinc Recycling is a leading environmental services provider to the US steel industry. We recycle wastes from steel production to reclaim valuable commodities such as zinc and other metals. Our efforts keep millions of tons of waste out of landfills and recycle metals back into productive uses ZRC Worldwide offers a range of cold galvanizing compounds to suit all your needs. Bridges, Construction, Fabrication, Industrial Maintenance, Instead of Hot Dip, Manufacturing, Nuclear Plants, Off-Shore Rigs, Parabolic Antennas, Public Projects, Tanks, Transmission Towers, Water & Waste, and more. ZRC shares your concern for ensuring the.

The collected scrap is heated until the zinc volatizes, separating from the steel as a gas. This gas is collected and treated, causing the deposition of zinc dust. After treatment in a Waelz kiln, the dust becomes zinc oxide which in turn becomes a raw material used for the production of zinc metal Industries also can release dust containing higher levels of zinc into the air we breathe. Eventually, the zinc dust will settle out onto the soil and surface waters. Rain and snow also can remove zinc dust from the air. Most of the zinc in lakes, rivers and streams does not dissolve, but settles to the bottom Dietary Supplement. These Spring Valley Zinc Caplets are formulated to promote immune health. Zinc is an essential mineral that supports immune health and energy metabolism. Each tablet delivers 50 mg of zinc gluconate. This formula contains no gluten, lactose, sugar, artificial colors or flavors, and is suitable for vegan and vegetarian diets About Us. Haryana Chemical Industries (HCI), an ISO 9001:2015 certified company, is one of India's leading manufacturers of Zinc Chloride and Galvanizing chemicals for the Hot Dip Galvanizing Industry. Founded in 1971 by Shri K.L. Kochar, We have over the years, grown from a Zinc Chloride commercial grade manufacturing company to manufacturers of a complete range of Zinc Chloride, Galvanizing. dust, grease, dirt, loose rust, and other foreign material to ensure adequate adhesion. Zinc rich coatings require direct contact between the zinc pigment in the coating and the metal substrate for optimum performance. Iron & Steel (atmospheric service) Remove all oil and grease from surface by Solvent Cleaning per SSPC-SP1

Zinc Lozenges Walgreen

Zinc rich paint coatings consist of metallic zinc dust in organic or inorganic vehicle/binders. Surface preparation by abrasive blast cleaning or by using power tools to expose bare steel with a profile (e.g. SSPC SP-11) is necessary, and coatings may be applied by brush or spray. Zinc rich coatings are barrier coatings which also provide. EAF dust, generated by steel mills contains zinc. SDR's brand-new facility specializes in the reclamation of zinc and other metals from this dust. SDR's main product is Waelz Oxide also known as Crude Zinc Oxide (CZO). This product is transformed into zinc oxide, zinc sulfate or zinc metal by zinc smelters U.S. Zinc-Clarksville Oxide Plant 480 International Boulevard Clarksville, Tennessee 37040, USA. U.S. Zinc-Millington Oxide Plant 3380 Fite Road Millington, Tennessee 38053, USA. DUST LOCATION. U.S. Zinc-Houston Dust Plant 6020 Esperson Street Houston, Texas 77011, USA. METAL LOCATION. U.S. Zinc-Houston Metal Plant 6020 Esperson Street Houston.

Zinc Supplements Walgreen

American Zinc Products is the only plant in the world that produces zinc solely from recycled sources. Through our process, we transform thousands of pounds of industrial byproduct materials into a valuable commodity that can be sold and reused to make thousands of construction and household products Zinc, a natural, healthy, and abundant element was first used in construction in 79 AD.Zinc metal has a number of characteristics that make it a well-suited corrosion protective coating for iron and steel products. Zincsexcellent corrosion resistance in most environments accounts for its successful use as a protective coating on a variety of products and in many exposure conditions EverZinc is a global leader in the production of zinc chemicals with four product lines: fine zinc powders, zinc oxide, zinc powders for batteries and Zano®, an ultrafine zinc oxide

American Zinc Products Rutherford County, N

2 Large Zinc ShamWows! 2 More Large Zinc ShamWows FREE! Just pay separate $6.95 processing. Plus a FREE ShamWow Mask! Now Only $19.95. Now Only $ 19 95. Order Now *Shamwows are 100% Viscose/Polypropylene thermally bonded non-woven cloth which is the material type used in Medical grade masks and N95 masks. (See More Information on FAQ Page). Zinc Supplements | The Vitamin Shopp Pot Metal & Zinc Die Castings. Used in the Auto Industry because of its ease in producing complex shapes at a minimal cost. Unfortunately as the years go by this material oxidizes and rots easily which makes it difficult to restore. A 1960 Corvette window post after stripping and glass bead blasting. Pitted areas are where the metal has.

Zinc is an important dietary nutrient that plays crucial roles throughout the entire body. Taking in too much zinc can be harmful, however, and it may cause a range of symptoms, including nausea. The MATH+ hospital treatment protocol for COVID-19 and the iMASK+ prevention and early outpatient COVID-19 protocol — both of which are based on the use of vitamins C, D, quercetin, zinc and melatonin — are available on the Front Line COVID-19 Critical Care Alliance's website. I suggest you bookmark these resources for future reference

Recycling Facilities - American Zinc Recyclin

ZRC® Cold Galvanizing Compoun

  1. Approximately 70 people attended the Feb. 10 meeting with Zinc Resources LLC, the company that applied to the Texas Commission on Envrionmental Quality (TCEQ) for an air quality permit. Per the application, the construction of an electric arc furnace (EAF) Dust Recycling Plant is proposed at 657 FM Road 99 in Whitsett in Live Oak County
  2. Zinc is an economical coating and coupled with chromate conversion coating provides substantial corrosion protection. We specialize in high volume rack plating. We use environmentally friendly trivalent coatings that are available in clear, black, and yellow colors. Our alkaline plating chemistry provides outstanding plating thickness distribution
  3. The experiments exposed large swathes of the United States, and parts of Mexico and Canada, to flurries of a synthesized chemical called zinc cadmium sulfide. New research from sociologist Lisa.

Zinc and copper are natural alloys. They require no additional coating and therefore don't need re-painting or polishing. Surface dust can be a major concern when cladding is located near the ocean. In addition to harmful dirt and harsh atmospheric conditions, spiderwebs and other bug debris can also collect in the express joins or seams. The Most Common Reasons People Get Vertigo. About 93 percent of all vertigo cases are caused by one of the following conditions: ( 1) Benign Paroxysmal Positional Vertigo (BPPV) BPPV is the most. Find a Target store near you quickly with the Target Store Locator. Store hours, directions, addresses and phone numbers available for more than 1800 Target store locations across the US Zinc coatings provide good protection for steel in hard waters, where the scale forming ability of the hardness salts allow for development of passive layers. Less favorable corrosion resistance is seen in distilled and soft waters. Zinc, being an amphoteric metal, exhibits good corrosion resistance in water having a pH near neutral Chromating is the process of applying a hexavalent chromate or trivalent passivate over a Zinc die cast for corrosion resistance. Read More. Black Oxide. Black oxide is a chemical immersion coating. Used in many different industries. Partnered along with an oil or wax will increase its corrosion resistance

Find your local Gallatin Lowe's , TN. Visit Store #2618 for your home improvement projects The zinc is simply buried in the ground near the iron and connected with a wire. I chose this sample to represent its element in my Photographic Periodic Table Poster . The sample photograph includes text exactly as it appears in the poster, which you are encouraged to buy a copy of Agree about grinding it away, it hisses and spits otherwise, 20 years ago I spent a while metal spraying zinc, the flu thing is real but short lived, at least for me, it was a known possibility. Find your local Lorain Lowe's , OH. Visit Store #2867 for your home improvement projects

Zinc dust, <10 μm, ≥98% 7440-66-

5/16-18 x 3' Low Carbon Steel Threaded Rod Right Hand Thread, Zinc Plated Finish, UNC. MSC# 06050124 Made in USA. In Stock When It Comes To Zinc Coating galvanized metal requires a different approach and is probably the trickiest metal to paint, says Kinnen. Plating metal with a thin zinc coat makes galvanized metal. This is done to increase the service life of the metal by preventing corrosion, but it creates some unique painting problems Product Title A+D Zinc Oxide Diaper Rash Cream with Aloe 4 oz Average rating: 5 out of 5 stars, based on 6 reviews 6 ratings Current Price $8.03 $ 8 . 03 - $30.04 $ 30 . 0

Zinc Smelter - Spelter, West Virginia - Atlas Obscur

Repair surfaces with paint containing zinc dust shall be clean, dry, free of oil, grease, pre-existing paint, corrosion, and/or rust. Clean surfaces in according with the requirements of SSPC SP10 (near-white). Where circumstances do not allow blast or power tool cleaning to be used, then hand tools may be used Zinc phosphide is an inorganic compound that combines phosphorus with zinc. It is used in rodenticide baits. When an animal eats the bait, the acid in the animal's stomach turns the zinc phosphide into phosphine. Phosphine is a very toxic gas. Phosphine is also released by aluminum phosphide and magnesium phosphide If you're shopping for fluids for your Ford F150, Chevy Silverado, electric vehicle, or any other car or motorcycle, NAPA AUTO PARTS has you covered. Shop Essential Vehicle Fluids and Chemicals. Engine Oil. Engine oil is the lifeblood of every engine. It not only lubricates moving components but also carries away contaminants Find here Crushed Stone, Gitti manufacturers, suppliers & exporters in India. Get contact details & address of companies manufacturing and supplying Crushed Stone, Gitti, Stone Aggregate across India

1 Gallon Galvax Cold Galvanizing Paint 95% Zinc Fastena

Echinacea and Zinc - Key ingredients that help support natural resistance.* Vitamins A and C - Essential antioxidant vitamins that protect cells against the damage caused by free radicals.* 48 vegetarian lozenges; As a dietary supplement, take two to four lozenges. Allow the lozenges to dissolve slowly in the mouth before swallowing The Everbilt 3 in. Zinc Mending Plates (2-pack) The Everbilt 3 in. Zinc Mending Plates (2-pack) provides ideal reinforcement for flat surface joints, seams or cracks. Its unique countersunk design allows screws to sit flush with material. Easy to install, it features a durable steel construction for a long-lasting use..

Shop Wayfair for A Zillion Things Home across all styles and budgets. 5,000 brands of furniture, lighting, cookware, and more. Free Shipping on most items Thermal Spray is also known as metallizing, flame spray, metal spray, plasma spray, or spray welding. We supply complete thermal spray systems, individual components, replacement parts, powder, and wire. We also supply auxiliary handling equipment, dust collectors, and rooms. This equipment is used to spray metals, alloys, ceramic, and carbide.

Skyhawk Chemicals - Houston, Texa

Stock# 5415092 UFP Super Lube Zinc Plated Steel Dust Cap can be used on most recreational trailer wheel hubs and drums. Designed for axle spindles with grease zerk fittings on the end. Rubber plug sold separately. Fits 2.328 I.D. hubs & drums Weicon Metal Zinc Spray, Packaging Type: Can ₹ 1,200/ Unit. Get Quote. Bright Metal Zinc-alu Spray, For Coating ₹ 1,200/ Can. Get Quote. ISOL Silver Zinc Spray. ₹ 250/ Pack Get Latest Price iRainy 2.1-Inch 5-Piece Grinder. amazon.com. $8.59. Buy. Just because it's cheap doesn't mean it's crap. This zinc alloy grinder comes with five pieces—including two mesh screens to sift pollen. The bright zinc coating will restore galvanized steel to the bright look of hot dip with 65 percent zinc in the dry film which meets ASTM a780 standards. Benefits: product provides good durability and salt spray resistance without containing lead chromates, methylene Chloride or fluorocarbons. Galvanic protection is consistent with zinc content We have the following zinc range includes various grades of Zinc Ash, Zinc Dust, Zinc Oxide, Zinc Sulphates, Zinc Nitrate, Copper Sulphate, Zinc Me... Wpilsa General Trading Pty | Zondereinde 384kq, District Of Thabazimbi, South Africa TrustPoints: 440

TRANSMISSION DEPOT INC. 700R4 Chrome Tin Dust Cover 2WD. $59.95. $59. . 95. FREE Shipping. Only 10 left in stock - order soon Summary: In human, the four current members of the microrchidia (morc) gene family share an N-terminal ATPase-like ATP-binding region and a CW four-cysteine zinc-finger motif. The protein encoded by this gene also has a nuclear matrix binding domain and a two-stranded coiled-coil motif near its C-terminus. This gene is widely expressed at low. levels of dust and noise. Abrasive material and the surface being blasted may contain toxic materials (e.g., lead paint, silica) that are hazardous to workers. • Silica sand (crystalline) can cause silicosis, lung cancer, and breathing problems in exposed workers. • Coal slag and garnet sand may cause lun Now $255 (Was $̶2̶9̶5̶) on Tripadvisor: Hotel Kilbourne, Sandusky. See 36 traveler reviews, 14 candid photos, and great deals for Hotel Kilbourne, ranked #2 of 9 specialty lodging in Sandusky and rated 4.5 of 5 at Tripadvisor Temperature 96 - 99°C (205 - 210ºF) Immersion time 15 min. Manganese phosphating solutions are more difficult to control than zinc phosphates. Each operational parameter must be carefully monitored and adjusted accordingly. Manganese phosphating solutions typically do not provide the best quality of coating from virgin solutions

American Zinc Recycling Delivering a Sustainable Futur

ZRC Worldwid

  1. Founded by Hymie Goldman in the late 1920's, Utah Metal Works originally had more to do with the manufacturing of electrotype and linotype printing plates than it did with scrap metal. After Goldman passed away in 1955, UMW was purchased by Harry Lewon and his two brothers Rubin and Louis. The Lewon brothers folded the printing plate business.
  2. 1870s the zinc smelting industry became an integral part of southeastern Kansas. Zinc is a silvery metal which, combined with copper, is used to make brass. Modern pennies are made with a zinc core covered with a copper alloy. Zinc is used to galvanize steel, preventing it from rusting, and as a white pigment in paints. A hundred years ago.
  3. eral, meaning that it's necessary for health, but the human body is unable to synthesize it! Zinc is one of the most abundant trace
  4. Find the best Powder Coating near you on Yelp - see all Powder Coating open now. Explore other popular Local Services near you from over 7 million businesses with over 142 million reviews and opinions from Yelpers
  5. eral deposits left by moving glaciers during the last ice age. This natural fertilizer contains essential plant nutrients that support strong plant growth, and can be used on all plants in home gardens, landscapes, lawn, and turf. GAIA GREEN Glacial Rock Dust can also be added to compost piles to help optimize nutrient conditions for root growth.
  6. iscent of an ocean surf. This pigment is an off-white powder in daylight and glows a bright blue-green... P02-AQU-M. 4.6 star rating
  7. ium oxide (Al 2 O 3), or magnesium oxide (MgO) which are produced as byproducts in the fumes that result when certain metals are heated
Simpson Strong-Tie 3/16-in x 2-1/4-in Zinc-Plated Self

Signs and symptoms of mild zinc phosphide poisoning include diarrhea and stomach pains. In more severe cases, nausea, vomiting, chest tightness, excitement, coldness, unconsciousness, coma and death can occur from pulmonary edema and liver damage. There is no antidote for zinc phosphide poisoning Zinc Zn Of all the forms, only the dust is suitable in the technical or high purity grade. It is a gray powder used in star mixtures and for fuel in model rockets. Zinc Borate 3ZnO.2B2O3 A white amorphous powder used in making smoke formulas. A relatively safe compound to handle. Zinc Carbonate ZnCO

Galvan Industries is a major supplier of hot dip galvanizing to businesses and industries throughout the Southeast. For structural or ornamental steel, Galvan's molten zinc process protects your investment against the elements better than any other coating With our vertically integrated powder coating and zinc plating capabilities, we supply welded steel tubing configured and finished to any custom specification. Our processes are ISO 9001:2015 certified and comply with ASTM, automotive, and other industry standards. We serve customers in an extensive range of industries, including architectural. We work efficiently and on a large scale, which means that we incur lower processing costs. This enables us to pay some of the most competitive rates in the non-ferrous metals recycling industry Despite being referred to as zinc, ZDDP also contains phosphorus, which helps to perform the anti-wear function in the motor oil.. Zinc acts as a friction inhibitor, and research suggests that older engines using flat tappet lifters in the engine (pretty much any V6 or V8 older than 1988) need to have zinc present in the engine oil in.

Bradleys Q-Zinc System Thermal Zinc Metal Spraying

  1. Constructed from durable zinc-alloy, the chassis of the Drag S Pod Mod Kit offers an integrated 2500mAh battery, rechargeable via Type-C Port. Equipped with the advanced GENE.TT chipset, it is capable of a near instantaneous firing speed, while offering an intelligent coil recognition to prevent burning of the installed PnP series coil
  2. Full roller grille or zinc plated expanded metal rack. Dry Developer St. Counter-balanced doors. Full roller grille or zinc plated expanded metal rack. Air filter, regulator & gauge. Front view window. Powder cone applicator. 2 ½ gallon pressure pot to contain powder. Rear exhaust plenum. Options include: Dust Collector. Inspection Boot
  3. Caswell. sku: LCW1020. LOOSE COTTON WHEEL 10 X 1/2. As low as $8.99. Choose Options. Quick view. Caswell. sku: LCW65. LOOSE COTTON WHEEL 6 X 1/2
  4. Detail Plating. 220 Machado Lane. San Luis Obispo, CA 93401. (805) 441-5390. Email: brakerestoration@gmail.com. Please call us or use the adjacent form for any questions about pricing, shipping or other details. Include your phone number, email address and the best time to reach you, and we'll follow-up with you
  5. um Powder Coating Paint 1 LB. From $6.99. RAL 5002 Ultramarine Blue Powder Coating Paint 1 LB. From $6.99. RAL 7035 Light Gray Powder Coating Paint 1 LB. From $6.99. RAL 1018 Zinc Yellow Powder Coating Paint 1 LB
  6. A Global Problem. Heavy metals have been found in road dust around the world, from Islamabad, Pakistan, and Sendai, Japan, to Hamilton, Ohio, and Philadelphia, Pa. Common sources include bits of.
  7. Find the best Organic Restaurants near you on Yelp - see all Organic Restaurants open now and reserve an open table. Explore other popular cuisines and restaurants near you from over 7 million businesses with over 142 million reviews and opinions from Yelpers

Richker Metals, Inc

Jewel Dust uses cosmetic grade talc that's ultra-fine and smooth. The ingredient list includes talc, zinc oxide, and fragrance. Zinc oxide is a skin protectant, used to fight odor and prevent itching. The fragrance is described as a masculine scent, though I'm not sure exactly what that means. Jewel Dust retails for about $10 on Amazon AZOMITE® is a natural product in Utah mined from an ancient volcanic eruption into a seabed and is distinct from any other mineral deposit in the world. AZOMITE is used internationally as a soil additive and organic fertilizer for vegetables. |. and is available in more than 50 countries throughout the world. Learn More

Zinc Electroplating in India

Camp Logan Cemen

Flush Pull Satin| Flush Pull Satin For Industrial UseMichael Heath-Caldwell M

Grease cap fits trailer hubs with 2.333 inner diameter and has corrosion-resistant zinc plating.Features: Grease cap for trailer hubs Drive-in installation Corrosion-resistant zinc plating 16-Gauge steel construction 5-Year limited warranty Specs: Quantity:1 Flange diameter: 2.333 Crown. Hydrogen chloride gas, Zinc/zinc oxides.Combustion products may include carbon oxides or other toxic vapors.Thermal decomposition can lead to release of irritating gases and vapors.Avoid generating dust; fine dust dispersed in air in sufficient concentrations, and in the presence of an ignition source is a potential dust explosion hazard Directory Find a Paint Store Near You . Dunn-Edwards products are sold in our [STORES-NUMBER#open] company-owned stores and numerous dealerships throughout [STATE-STORES#arizona], [STATE-STORES#california], [STATE-DEALERS#kentucky], [STATE-DEALERS#montana], [STATE-STORES#nevada], [STATE-STORES#new-mexico], [STATE-DEALERS#oregon], [STATE-STORES#texas], [STATE-DEALERS#utah] and [STATE-DEALERS#. Zinc is a transition metal that occurs in the center of the periodic table. Alchemy was a kind of pre-science that existed from about 500 B.C. to near the end of the 16th century On the other hand, an excess of zinc can cause health problems, too. Breathing zinc dust may cause dryness in the throat, coughing, general weakness and aching. Zinc phosphates are applied on steel surfaces using solutions of zinc phosphate, phosphoric acid and activators. These proprietary chemical solutions deposit a crystalline coating of zinc phosphate during the application process. During the initial steps in the process, the metal is cleaned to remove oily soils. They can be applied cold or hot

  • Another word for owning someone.
  • Clock change 2021 Ireland.
  • Arrowhead Frames.
  • Clumsy Ninja Kira dead.
  • Honda CRV 2019 permit price in Sri Lanka.
  • The return of Toad part 1.
  • Broward bike rental Fort Lauderdale.
  • Audio visual presentation app.
  • Panniculus adiposus location.
  • PS4 Bluetooth Dongle Walmart.
  • Building cost Calculator Kenya.
  • Underground things list.
  • 48 side by side refrigerator/freezer vcsb5483 viking 5 series.
  • Baby born at 32 weeks survival rate.
  • Hija de Daddy Yankee Instagram.
  • How to build an outdoor mini fridge cabinet.
  • British made ties.
  • Decoy Carving Patterns.
  • Active Communities Network Hampshire.
  • How to weld rivets on an aluminum boat.
  • Dried Figs Meaning in Hindi.
  • What is a Code Green in School.
  • Dolphin Tours Waianae.
  • Bold and Beautiful spoilers.
  • Best before meaning in Marathi.
  • How to make a time portal.
  • DP Pics For Whatsapp.
  • Has A Horn Word Crush.
  • Western Union money order Customer Service.
  • Music Box Attic Phone number.
  • Irul Rotten Tomatoes.
  • Diving in Yanbu, Saudi Arabia.
  • Zakynthos to Santorini flight.
  • Best nightlife in Portugal.
  • Ozempic side effects.
  • Watercolor tinting strength.
  • Free acoustic drum loops.
  • Importance of creativity in entrepreneurship PDF.
  • Hobby lobby Cow picture.
  • Famous movie artwork.
  • Deep philtrum baby.