QUAZARBINARY
Cloverleaf Quasar (a.k.a. H1413+117):
Chandra Looks Over a Cosmic Four-Leaf Clover
X-ray: NASA/CXC/Penn State/G.Chartas et al; Illustration: NASA/CXC/M.Weiss
JPEG (170 kb), Tiff (24.6 MB), PS (4.5 MB)
The Cloverleaf Quasar is a single object whose image has been reproduced four times in a cloverleaf-like arrangement through a process known as gravitational lensing. The gravitational field of one or more foreground galaxies has bent and magnified the light from the quasar to produce the multiple images. The foreground galaxies are too faint to be seen in these images.<1font>
HERE IS A LITTLE LIST OF MAGNETIC AND MINERAL RELATED SITES NOT VISITED BUT OFFERING SERVICES AND INFO TO THE RESEARCH AND INDUSTRY COMUNITY.
- General "Company" Listings
- ClickIt: Business Pages
- Industry Net
- Industry Link
- Industrial Quick Search
- Lab Crawler: ISC Buyers Guide
- Long Island High Technology Incubator
- Long Island Research Institute
- SciTrak
- SciQuest
- TechExpo
- Thomas Register - On Line
- Materials Manufacturing
- Aluminum
- Alcan
- Allied Metal
- Almetals
- Aluminum Association
- ALCOA: The Aluminum Co. of America
- ALCOE: The Aluminum Co. of Egypt
- Alumax: a world leader
- Aluminum Extrusion Consultant Inc.
- Aluminum Industry
- AlumiTech
- Elval
- Hepworth: refractory products for the aluminum industry
- Kaiser:
- Metal Matrix Cast Composites: Al and Cu composites
- Northwest Aluminum
- Reynolds: the Aluminum products company
- Specialty Steel and Forge: they do Al also
- Ceramics
- Abrasives Mall
- Advanced Ceramics
- Advanced Ceramic Technology: Precision ceramic parts
- Advanced Refractory Technologies
- A. J. Carsten: tape casting machines, kilns, furnaces, ovens
- APGreen: refractories
- Asbury Carbons
- BNZ
- Borges
- British Glass
- Cabot
- Carbide Processors
- Carborundum Corporation
- Ceradyne
- Ceramics and Industrial Minerals
- Ceramics Consulting Group
- Ceramics for Industry: silicon nitride and aluminum titanate
- CeramTek
- CM Furnaces
- Coors Electronic Packaging: Ceramics for business
- Coors Technical Ceramics
- Corning: the ceramic/glass company
- Crystalume: CVD diamond
- Custom Tech Ceramics
- Diatomic: precision microceramics CVD diamone
- Eastern Mineral and Chemicals
- ECC International, CERAMIC GROUP
- Electro Abrasives: HQ powders
- Exolon
- Feldspar
- Ferro-Ceramic Grinding: precision machining/processing
- Fuller - Ruark: consulting engineers
- Graphite Electrode Sales
- GE Quartz
- Harrop: kilns, ovens, furnaces
- High Temperature Systems: graphite products
- Hitco Technologies
- HTI Technologies
- International Ceramics
- Ipsen
- Kason: separators and seives
- KC Abrasives: micro-graded abrasives
- Keith Ceramic Materials
- Kentucky-Tennessee Clay
- K-Style Advanced Ceramics: ZrO2 products
- Lindberg Heat Treating
- Microsilica New Zealand: amorphous silica
- Morton Advanced Materials: CVD Silicon Carbide
- New Zealand China Clays: halloysite clay
- NJ Diamond Wheel
- Norton Pakco Industrial Ceramics
- Omega Slate: technical ceramics
- P1 Limited: CVD diamond
- Plibrico: refractories
- Poco: carbon and graphite
- PQ Corp: sodium and other derived-silicates
- Pyrotek
- Reade Advanced Materials: Ceramic raw materials
- RefMet Ceramics: Diamond, PVD, Ceramic coatings
- Refractron: advanced porous ceramics
- Sialon Technical Ceramics
- SiNeramics: silicon nitride
- Sonic
- Starfire Systems: specialists in SiC
- Sun Diamond
- Superior Graphite Comp: specializing in Silicon Carbide
- Tech Ceram: for electronics industry
- Techniweave: composites
- Unique/Pereny: Ceramic Casting machines
- US Silica
- Valley Design
- Vesuvius
- WashingtonMills: electro-fused minerals
- West Manufacturing
- Worldwide Composites
- Zircar: fibrous ceramics
- Zircoa
- ZIRCAR Refractory Composites
- Coatings and Films
- Aerostar Coatings:
- Alfa Aesar: sputter targets and pure metals
- Applied Coatings: thermal/plasma-spray and PVD-metallization
- Archer Technicoat: CVD & CVI equipment & processes (UK)
- Beijing Bridge Tech-Trading (PRC): Thermal Spray
- Bekaert VDS: Thermal Spray
- Bronz-Glow
- Castolin/Eutectic: thermal/plasma-spray
- Cathay Advanced Materials Ltd: rare-earth sputter targets
- Cerac: Specialty Chemical and Sputtering Targets
- Coating Measurement Instruments: what the name says!
- Copeland: thermal spray
- CYCAM: surface conditioning
- DeFelsko: thickness measurement
- EPS Plating: Bay area metal finishing
- ESPI: Elements for Science/Engineering
- GoodFellow: Metals and Materials for R&D.
- HTI Technologies
- International Metalizing Corporation: electric arc metalizing
- Kemco
- MicroCoating Technologies: combustion CVD
- Other Thermal-Spray links**
- OSU Maschinenbau: thermal spray
- Ohio Structures: thermal spray
- Multi-Arcs: PVD/CVD
- Plasma Processes
- Protek Coatings
- Progressive Technologies: plasma spray
- RefMet Ceramics: Diamond, PVD, Ceramic coatings
- SermaTech
- SNMI: thermal spray
- Soleras: sputter targets, consumables, and components
- Sophisticated Alloys: sputter targets
- Sputtering Materials: sputter targets, consumables, and components
- Sulzer-Metco Inc.: Thermal Spray Technology
- Surface Web
- Swain Tech: dozen+ coating techniques
- TAFA, Inc.: Thermal Spray Technology
- Tagnite: high performance finish for magnesium
- Target Materials: Sputtering Sources
- TechniCoat: composite coatings
- UVMaterials: sputter targets and pure metals
- Williams: sputter targets and pure metals
- Composites
- Alanx: ceramic/metal compsites
- Composite Links from Turner Moss
- Composite Materials
- Composite Technology Development
- ERG Aerospace: metal/ceramic foam
- Daewoo Advanced Composites Center
- M3 Technologies: composite/advanced materials
- Ray Publishing: HP Composites and Composites Technology
- Techniweave: composites
- Thermsulate: thermal shielding
- Worldwide Composites
- Copper
- Ampco: the largest producer of Copper Bronze alloys in NA
- Copper
- Ingot: a complete range of copper-based alloys
- Revere Copper Products
- Specialloy Metals: copper and alloys
- Swissmetal: copper and alloys
- Wolverine Tube: copper
- Magnetic Materials
- Arnold: magnetic materials
- Dexter Magnetic Materials
- Magnetic Solutions
- Metall: rare earths
- National Imports LLC: Rare-Earth Magnetics
- Other Metals, Distributers, etc.....
- Allegheny Ludlum
- Allvac
- AlloyTech
- American Metals Market: pricing
- Ametek: advanced metal powder technology
- Arris: high-purity rare-earth metals alloys and oxides
- ArtMetal Resource To Metalworking
- http://www.asm-intl.org/www-asm/matprod/matp_0.htm">ASM's List of Materials Producers
- Atomizing Systems: metal powders
- Brown: powder technology
- Brush Wellman: Be and alloys
- Castings Net: devoted to castings
- Carpenter Technology Corp.: specialty materials
- CMW: Specialty materials based on W or Mo
- Composite Links from Turner Moss
- CSM Industries: moly
- Degussa
- Elkem: ferroalloys, microsilica, specials
- Finishing.Com: A huge resource for the Metals Industry
- Ferro
- FJ Brodmann: powders
- Foundry Management & Technology
- Hanover Metal Co: non-ferrous metals
- Hard Face Alloys
- High Performance Alloys
- High Purity Alloys: for sputtering targets
- Hyndman Heating Elements: coiled wire
- Indium Corp. of America
- Indium Wire Extrusion
- InductoHeat
- IncoAlloys: Nickel based alloys
- Johnson Matthey Electronics: everything for semis!
- Kvaerner Metals
- MagnaPlate
- Magnesium, Int'l
- Marketech Intl: advanced materials supplier
- Materials Resources: advance bonding technology
- Metals Machining and Fabrication
- Metal Matrix Cast Composites: Al and Cu composites
- Metal Prices: pricing
- Metal Suppliers Online: suppliers and properties database
- MetalWorks (for handcraft)
- MicronMetals (Atlantic Equipment Engineers): powders
- Mine Link
- Mintek: South African Gold, Platinum, Chromium, etc.....
- Mi-Tech Metals: W and refractorys
- Molecular OptoElectronics Corp
- Molycorp
- M3 Technologies: composite/advanced materials
- MuShield Co
- NiTiNOL
- Online Metals: non-ferrous distributer
- Parke Mathematical Laboratories: InP, GaN, SiGe
- Protective Metal Alloys: hardfacing alloys
- Powder Tech: specializing in powders
- Principal Metals: online database of properties
- Pyron: sponge and powders
- Quebec Metal Powders
- Rhenium
- Robins: specialty metals
- Rolled Alloys: heat/corrosion resistant alloys
- Shape-Memory (NiTi)
- Sophisticated Alloys
- http://www.lajolla.sparta.com/">Sparta's AMPO: advanced material technology
- Special Melted Products
- Special Metals: superalloys
- Stanford Materials Company
- Specialty Steel and Forge: refractories, alloys, Al, steel, etc....
- Strategic Aerospace Materials: supplier of all grades of metals
- Stratum Resources: minerals of asia,nz,au, etc....
- Tantalum-Niobium, Int'l Study Ctr
- Ultramet: specialty metals
- Valley Design
- Vitta: nickel based alloys
- Wah Chang
- Wall Colmonoy: alloys
- http://www.yahoo.com/Business_and_Economy/Companies/Engineering/Materials/">Yahoo's List
- Powders
- Alldyne Powder Technologies
- American Powder Metallurgy Institute
- Ametek: advanced metal powder technology
- Argonide: nano-sized metal powders
- Atomizing Systems: metal powders
- Brown: powder technology
- Crucible Research: specialy gas atomization powders
- Electro Abrasives: HQ powders
- EPMA: European Powder Metallurgy Industry
- FJ Brodmann: powders
- Hogonas: powders
- Invest: nanopowders
- Metal Powder Industries Federation
- MicronMetals (Atlantic Equipment Engineers): powders
- NanoPowders: nano-sized metal powders
- Nanostructured & Amorphous Materials: nano-sized powders
- Nanomaterials Research
- NanoPhase
- National Center for Excellence in Metalworking Technology: Powder and Porous Materials Knowledge Base
- Powder Tech: specializing in powders
- PowderMet: nano/micro powders
- Pyron: sponge and powders
- Quebec Metal Powders
- Reade Advanced Materials: metal, ceramic, and composite powders
- Tecnar: spray-powder analysis
- Valimet: powders
- Warren Diamond Powder: mico-superabrasives
- Steel and/or Iron
- Aquadevice: anti-corrosion alloys (Seawater-Resistant Stainless Steel)
- A. Finkl and Sons
- AK Steel
- ARBED: Metal Products
- Acme Metals
- Acominas
- Admiral Steel
- Algoma Steel
- Metalworking Products
- Alliance Midwest Tubular Products Co.
- American Iron and Steel Institute: AISI
- An Feng Steel
- Arbed
- Aribasteel Ltd., England
- Armco
- Association of Iron and Steel Engineers: AISE
- Atlas Specialty
- Auburn Steel Co., Inc.
- Avesta Sheffield
- BHP
- Baosteel
- Battershill Steel Industries
- Bayou Steel
- Belmont Steel Corp.
- Bethlehem Steel
- Birmingham Steel
- British Steel
- Cargill Steel
- Carpenter Technology Corp.
- Chaparral Steel: from recycled scrap steel
- Charleroi
- Chongqing Iron and Steel
- Cockerill Sambre Group
- Companhia Siderurgica Nacional
- Companhia Siderurgica Paulista
- Connecticut Steel
- Crucible Materials Corp.
- Daido Steel
- Dofasco
- Dura-Bar: continuous cast-iron bar
- Duraloy: heat/corrosion resistant
- Forging Association
- forging.bz: list of forging companies
- Forging Industry Educational and Research Foundation
- Geneva Steel
- Goodwin Steel Castings (UK)
- Georgetown Steel
- Gray-Iron Castings: meta-site for such castings
- Grupo Imsa
- Gruppo Lucchini
- Haynes International Inc.
- Hylsamex
- Hylsamex
- ISPAT, Inland
- Iscor
- Kawasaki Steel, Japan
- Keystone Steel and Wire Co.
- Kobe Steel
- Kubota
- LTV Steel
- Lukens
- Macsteel
- Maryland Specialty Wire
- NKK
- National Forge Co.
- National Steel
- Nippon Steel
- North Star Steel Co.
- Nucor
- Olympic Steel
- Oregon Steel Mills
- Oregon Steel Mills
- POSCO
- PT Krakatau Steel
- Peak Trading CompanyPeak Trading Company: Ferro-Alloys
- Pittsburgh Flatroll Co.
- Plymouth Tube Co.
- Queen City Forging
- Rautaruukki Group
- Renown Steel, Canada
- Republic Engineered Products
- Rouge Steel Co.
- SSAB
- Sandvik Steel
- Scientific Tube, Inc.
- Sheffield Steel Corp.
- Shree Precoated Steels
- Siam Steel Group
- Siderar
- Slater Steels - Hamilton Specialty Bar Division
- SMI Steel
- Special Metals
- Specialty Steel Industry of North America
- Specialty Steel and Forge: steel, refractories, alloys, Al, etc....
- Standard Steel
- Steel Authority of India
- Steel Lynx (meta-site)
- Steel Manufacturers Association (SMA)
- SteelNet
- Stelco
- Sumitomo Metals Industries
- The Steel Alliance
- Thyssen Aktiengesellschaft
- Thyssen
- Timken
- US Steel Group
- USS-POSCO Industries
- Ulbrich Stainless Steels and Special Metals,
- UltraCast
- Usiminas
- Vision Metals: pipe/tubing
- WCI Steel, Inc.
- Weirton Steel
- Western Tube and Conduit Corp.
- Wheeling-Pittsburgh Steel
- Yieh United Steel
- Titanium
- Dynamet
- GS Titanium: Ti, Ni, Co, Zr alloys (cold drawn down to 0.005")
- RMI Titanium
- Titanium and Alloys Corporation
- Titanium Development Association
- Titanium Industries
- Titanium Metals
- Titanium Sales
- Williams Titanium
- Tungsten
- Allegheny Technologies
- Buffalo Tungsten: W and WC
- Kulite Tungsten
- M and I Materials Ltd: W
- Tungsten
- Polymers/Plastics/Chemicals
- Aluminum
- Materials Testing and Services
- Accurel: lots of techniques here
- Advanced Materials Instruments and Analysis: xray analysis and instr.
- Advanced Plastic and Materials Testing
- Advanced Technology: stress/strain uprobe
- AEA Technology: Materials and Chemical Process Assessment
- Alabama Specialty: corrosion monitoring
- AMS Worldwide: E112 analysis
- Applied Technical Services
- ASTM Testing Buyers-Guide: (no links as of 02/99)
- ASTON Metallurgical Services
- Belmont: non-destructive testing
- BendTec
- BITEC: ASTM sample prep
- Bridge Technology: rep for test/meas equip
- Briem Engineering
- BuzzMac: Non-destructive testing software
- Cambridge Polymer
- CANSPEC: materials engineering and testing
- CenBase/Materials: Materials DataBase
- CERAM Research
- CMP Cient�fica
- Conam Inspection
- Corrmet
- Crucible Materials Corp.
- InterCorr International: was CLI Houston
- Coast Testing/Bacon Donaldson
- Columbus Metallurgical
- Corrosion Com
- Corvib
- Dapco NDT: non-destructive testing
- Definitive Imaging
- Delsen Labs
- Detroit Testing
- Durability
- Dynamic Systems
- Element Anaylsis Corporation
- Enercor Int'l: Corrosion control research and consulting
- Engel Metallurgical
- ESM Software: for Materials Properties
- Eutectic
- Evans East
- Exponent FAA
- Failure Analysis
- Failure Analysis: another one
- Fitzsimmons & Associates, Inc.
- Frahme
- FTL (Fleet Technology Ltd): Mechanical Testing and Analysis
- Galbraith Labs
- Geller MicroAnalytical Labs
- Goggin Research: Product Development Specialists
- Granta: materials selection database
- H&M Analytical Services: XRD/F and met services
- Hannam Techno: inspection (Korea)
- The Hendrix Group: consultants
- Hoffman Feige: M^3 QA, Corrosion, and Failure Analysis
- Holometrix: thermal properties
- IBM: analytical services group
- Imptech: Product for Metallography
- Infodex: materials dbase
- InterCorr: Corrosion/Materials Info Service
- Ithaca Materials Research
- Laboratory Testing
- Lambda Research
- Massachusetts Materials Research
- Kennedy and Associates
- Mar-Test/MCL
- MatWeb: Online Materials Information Resource
- Material Realisations
- Materials Analytical Services (MAS)
- Materials and Chemistry Laboratory: (MLIC)
- Materials Characterization Lab
- Materials Engineer
- Materials Evaluation and Engineering
- Materials Properties Council
- Materials Science Associates
- MCNC Analytical Lab
- MEI-Charlton: consultants
- Metallurgical Engineer
- Metal Samples
- Metcut Research
- MRA Laboratories
- NDT: non-destructive testing
- NDT Italia: non-destructive testing in Italy
- NSL (National Spectrographic Labs)
- Packer Engineering
- ODonnell Consulting
- Panametrics: ultrasonic NDT
- Pittsburgh Materials Technology
- Port Richmond Engineering
- Purtech
- Refrac: vacuum metallurgical operations
- Russell Technologies: NDE using rt,mt,ut,pt,vt,rft,.....
- SEAL Laboratories
- SEM Lab: scanning electron microscopy and failure analysis
- Shiva Technologies: trace elemental analysis
- SPEX - CertiPrep: Standards
- SPI: Structure Probe Inc
- Stellite
- STEM: Science and TEchnology of Materials
- Surface Science Laboratories
- Tagnite: corrosion, adhesion and abrasion testing
- TEC: Stress Analysis Products and Services
- TEM Analysis
- Thielsch: various testing services
- Thermophysical Properties Research Laboratory
- TCR Engineering Services: materials testing in India
- StressTel: ultrasonic analysis
- http://www.yahoo.com/Business_and_Economy/Companies/Engineering/Materials/">Yahoo's List
- Supplies and Equipment
- Also see local "semi" equipment list
- Aadvanced Machinery
- Admet: new/used/retrofit tensiometers
- Advanced Technology: stress/strain uprobe
- Allied High Tech Products
- Amherst Process Instruments: particle sizing
- Anter: thermal testing equipment
- Ardente and Associates: hardness testers
- Applied Nano Metrics: nano-indentation
- Applied Test Systems: mechanical-properties equipment
- Atspa
- Benz Materials Testing Instruments: the gamut
- Brookfield: viscometers
- Buehler
- Carver Press
- CEAST: testing gear (mostly for polymers)
- Cincinnati Scientific
- C-FER:
- Cooke: extensiometers
- CSC Scientific: particle size, surface tension, moisture
- Delta Analytical Instruments
- Dension-Mayes Group (UK)
- Disco: abrasive diamond components
- DynaCut: diamond/abrasive saws
- EG&G - PAR: electrochemical measurements
- Fatigue Dynamics
- FisherTech
- Gamry: Corrosion Measurement
- Grip Engineering: grips and fixtures for tensile tests
- Haake: rheo, visco, and thermal analysis
- Horiba: particle sizing
- Hysitron: nanomechanical test instruments
- Hytek Europe: diamond/CBN cutting wheels
- Indentec: hardness testers
- Instron/Wilson
- Korea Materials Analysis Corp
- KrautKramer
- Lapmaster
- JSR Ultrasonics: UT pulsers/receivers
- Leco: particle size
- Leica: hardness/sizings
- Linseis: Dilatometers
- Load Cell Central: load cells
- Logitech: precision sawing/lapping/polishing
- Mark-10: hand force/torque digital gauges
- Matec Applied Sciences: particle sizing
- Mecmesin Limited: Force & Torque Test Solutions
- Metatech: metallography/spectroscopy testing machines
- MetLab: metallography testing/prep equipment
- Metravib: dynamic and thermo-mechanical analysis
- Mettler
- MicroMeritics
- Microphotonics: surface testing equipment
- Mitutoyo
- Modsonic Instruments: ultrasonic non-destructive testing
- MTS
- Navas: micro/macro Vickers/Knoop
- Optonor: vibration and NDT
- Physical Acoustics
- Porous Materials, Inc.
- Quad Group
- Re-Test: meta-site for mechanical testing
- Rheometric Scientific: rheo, visco, and thermal analysis
- Satec
- Shimadzu
- Solartron: electrochemical measurements
- Sonatest: ultrasonic flaw/thickness testing
- SPI: Structure Probe Inc
- Staveley NDT: ultrasonic/eddy/composite-testing/xray
- Stresstech
- Stroud Systems: NDT since '62
- Struers
- Sturbridge Metallurgical Services
- Sun-Tec: hardness specialist
- TAinst
- Tecnar: spray-powder analysis
- TemaTest: NDT and more in Italy
- TestResources
- Thermo
- Test Systems Inc: NDT and more
- ThermCraft
- TechQuip: full range
- Theta-US
- Tinius Olsen: testing machines
- UltraTec: polishing, lapping, and consumables
- Uniscan
- Vallen: acoustic emission
- Wagner Instruments
- Wazau: tribometers
- Warren Diamond Powder: mico-superabrasives
- Westmoreland Mechanincal Testing and Research
- Windsor
- Xactex: NDT equipment
- Zetec: eddy-current
- Zwick: mechanical properties testing
- Reps
- Jess W Jackson; NDT equip
- Processing Equipment
- Datapaq: temperature profiling
- Hosokawa Micron: processing equipment
- Metaullics: molten/corrosive metal products
- Stelterbrinck: process heat equipment
- Thorpe Techologies: thermal proccesing equipment
- Thixomat: thixotropic molding of Mg
- Technic: plating/surface-finishing
- Cryogenic Processing
- CryoTemper: cryogenic tempering
- One Cryo: cryogenic tempering
- Ultrasonic Welding
- Dukane
- Stapla
- Rapid Prototyping
- Metalworking Equipment
- Action Machinery
- Active Machinery Sales
- Adams Machinery
- Alpine Equipment
- American Machinery & Tool
- American Metal Industries
- American Systems & Equipment
- Ameritool Industries
- Anderson Foundry Systems
- Barbarotto Machinery
- Blackhawk Machinery
- Bradford Equipment
- Brex Sales
- Equipment MLS: listing/meta-site
- Fabricating Machinery
- Fourway Machinery Sales
- GE Capital Commercial Shopping Network
- German Machine Tool
- GlobeSource Machinery
- Industrial Machinery Exchange
- Industrial Services
- Industrial Steel & Machine Sales
- Machinery Liqidators
- Machinery Martketing
- Machinery Wholesalers
- Morton Machinery Company
- Northeast Machinery Exchange
- NorthStar Equipment
- NPF Industries
- NS Machine
- Online Asset Exchange: used/new CNC/metalworking equipment
- Ottomatics
- Oxford Machinery Sales Corp
- Paramount Machinery
- Perfection Machinery Sales
- Prestige Equipment
- Seminole Machinery Company
- Shamrock Machinery Company
- Southern Minnesota Machinery Sales
- Supa Machinery Sales
- Universal Metalworking Equipment
- Used Foundry Equipment Sales
- Westbrook Engineering
- Wisconsin Metalworking Machinery
AT PAGE
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Hubble Optical Image of the Cloverleaf Quasar One of the images (A) is brighter in both optical and X-ray light. However, the relative brightness is greater in X-ray than in optical light. Since the amount of brightening due to gravitational lensing does not vary with the wavelength, some additional effect must be magnifying the X-rays. The increased magnification of the X-ray light can be explained if the X-rays in the Cloverleaf Quasar come from a small region around its supermassive black hole, and the optical light comes from a larger area. This could happen if a star or binary star system in one of the intervening galaxies passes in front of the region producing the X-rays. This effect is called gravitational microlensing. Illustration of Wind from Accretion Disk Around a Black Hole The Cloverleaf X-ray and optical data indicate that the X-rays are coming from a very small region, about a hundredth of a light year or less, around the supermassive black hole. The visible light is coming from a region ten or more times larger. The angular size of these regions at a distance of 11 billion light years is tens of thousands times smaller than the smallest region that can be resolved by Chandra or the Hubble Space TelescopeThis discovery gives astronomers a new and extremely precise probe of the gas flow around the supermassive black hole that powers the quasar. Reference Library 4 Meadowpoint, Aliso Viejo, CA 92656, U.S.A. Tel: (949) 362-1746 Fax: (949) 362-1810 or e-mail to [email protected]2. Useful Links
A. Materials Safety Data Sheet (MSDS):
- ChemQuik Safety Data- 500,000 MSDS files on most commonly used chemicals
- MSDS Database at Cornell University
- Where to find MSDS on the INTERNET
- Saferty Information on the INTERNET
- Chemical Safety Data
- ChemFinder MSDS Archives
- MSDS Data at Oxford University
- MSDS Online
- MSDS Safety Line- Global MSDS databases from Australia
- Material Safety Data Sheets from US Dept. of Labor
- Chemical Safety Portfolio-Hazardous properties of materials
- Chemical Abstract Service - 18 million substance records
- MSDS- Pyrotechnic Chemicals
- ChemTrec - A significant source for hazardous materials
- - OSHA Regulations and Standards
- Dictionary of MSDS Terms - An A to Z list of the technical words most commonly found in MSDS forms
(Stanford Materials' Favorite)
(Stanford Materials' Favorite)
(Stanford Materials' Favorite)B. Information sources of materials:
C. Other suppliers of chemicals and materials:
D. Materials related organizations:
E. Some US Government's web sites:
F. Rare earth information sources:
ChandraJ1655-0jn06Binary.jpg View Feb 09 07:38pm 21 QUAZARZ.HTML View Feb 09 07:42pm Stats 1 chandraQuazzarGravLensedx4.jpg this page is copyrite*[email protected] variou metal,mineral,mining,and scientific persons and corporations contributed invaliable work! Use in con- junction with the garden and solar pages to create smiling communities and glorious objects de art!
