Used Varian 3900 Gas Chromatography for sale (3,491)

Condition: excellent (used), Year of construction: 2004, Gofa semi-trailer cryogenic for nitrogen, argon, oxygen, LIN, LOX, LAR. Godpfx Akjrk Na Aeajug Year: 2004 Working pressure: 3 bar Volume: 12000 L We have also other tankers for LIN, LOX, LAR, LNG und CO2, argon, oxygen, nitrogen and carbon dioxide. We will be glad to answer your questions via phone and e-mail

Condition: used, This listing is for a Varian Autosampler Model 410 unit on it's own. The Varian ProStar 410 HPLC Autosampler has variable injection volumes and automixing/autodiluting. The ProStar 410 is perfect for laboratories with changing needs. It provides flexible operation without sacrificing reliability or performance. Multiple injection modes for flexibility, ease of use, and precision. Full loop filloverfills the sample loop for maximum precision. Partial loop fill allows easily programmed variable injection volumes. Microliter pickup withdraws the exact amount to be injected without sample loss. The Varian ProStar 410 AutoSampler offers the best of both worlds. It is intelligent for research applications yet rugged enough for routine quality control work. With Pressure Assisted Sampling Aspiration (PASA), the Varian 410 ProStar AutoSampler applies pressure within the vial while the sample is withdrawn by a high-resolution syringe. Air bubbles and in-vial vacuum problems are eliminated resulting in excellent reproducibility. Flexibility with multiple injection modes Optimal performance with integrated column oven Biocompatible and sample cooling options available Specifications: Standard sample tray 84 x 1.5 mL vials with 3 x 10 mL vials Optional sample trays 96 x 2.5 mL vials or 24 x 10 mL vials Dispenser unit 50 µL syringe standard; 1000 µL or 2500 µL syringes, optional Injection volume 1 to 5000 µL with preparative option up to 10 mL Injection methods nine methods in memory Needle wash integrated, programmable large reservoir Vial detection Yes Reproducibility Full Loop: < 0.3% RSD Partial Loop: < 0.5% RSD Microliter Pickup: < 1.0% RSD Carryover < 0.05% Optional sample cooling 4°C to 15°C programmable Can be refurbished on request, refurbishment not included in price. Gedpfoxzh Amsx Akaoug

Condition: used, Year of construction: 2009, operating hours: 49,800 h, machine/vehicle number: GZN00767, fuel type: gas, motor manufacturer: Caterpillar G3520C, General information Field of application: Construction Weights Empty weight: 17.500 kg Functional Generator capacity: 2.150 kVA Dimensions of cargo space: 7 x 2 x 27 cm Other information Fuel consumption: 8895 Btu/ekW-hr Generator: Caterpillar SR4B Frequency: 50 Voltage: 400 Drill equipment: Control Panel Additional information Please contact Team DPX for more information Guodpfozpdn Uox Akaeg = Additional options and accessories = - Control Panel

Condition: excellent (used), Heating boiler Buderus GE315-140kw. Oil or gas Weishaupt Guedpfx Aomnqcqekasg

Condition: excellent (used), Heating boiler Buderus G215-58kw. Gas Weishaupt Guodpfxomnqcxs Akajg

Condition: used, Year of construction: 2009, operating hours: 49,800 h, machine/vehicle number: CAT0000LGZN00768, fuel type: gas, motor manufacturer: Caterpillar G3520C, General information Field of application: Construction Weights Empty weight: 17.500 kg Functional Generator capacity: 2.150 kVA Dimensions of cargo space: 7 x 2 x 27 cm Other information Fuel consumption: 8895 Btu/ekW-hr Generator: Caterpillar SR4B Frequency: 50 Voltage: 400 Gedpfjzpdn Iex Akajug Drill equipment: Control Panel Additional information Please contact Team DPX for more information = Additional options and accessories = - Control Panel

Condition: like new (used), functionality: fully functional, cooling capacity: 895 kW (1,216.86 HP), type of input current: three-phase, type of cooling: air, overall weight: 6,525 kg, input voltage: 400 V, total width: 2,400 mm, total length: 12,960 mm, total height: 2,850 mm, warranty duration: 6 months, Gas cooler & Evap CX heat pump Güntner S-GGDV CD 090.1 DE/2C-E-44 Gas cooler capacity: 895.0 kW Evaporator capacity: 465.0 kW Refrigerant temperature: inlet 120.0°C — outlet 37.0°C (gas cooler) Evaporation temperature: -2.0°C (evaporator) Air flow: 216092 m³/h Guedpfx Ajzqui Eskajg Fans: 24 pcs. EC, 3~400V 50-60Hz Tubes: copper / Fins: epoxy coated Heat exchange surface: 4839.5 m² Max operating pressure: 130.0 bar Dimensions: 12.96 x 2.4 x 2.85 m Weight: approx. 6525 kg Condition: used for testing

Condition: excellent (used), Year of construction: 1990, Aurepa gas tank semi trailer for oxygen, nitrogen, argon cryogenic Technical Information: Working pressure: 3 bar Pump: yes Godpfxsittfns Akaeug Flowmeter: yes We would also be pleased to prepare an offer for you or provide you with further information. To discuss the possibilities, please contact us via e-mail.

Condition: ready for operation (used), Varian 640-IR FT-IR Spectrometer The Varian 640-IR is a high performance spectrometer that makes FT-IR spectroscopy easy. With a range of unique, user-friendly hardware and software features, you can quickly become productive. Spectral range: 7900 - 375 cm-1 Spectral resolution of at least 0.25 cm-1 Signal-to-noise ratio (the number of scans is 100, with a standard configuration with a spectral resolution of 4 cm-1): at least 10000 cm-1 The level of pseudo-scattered light is not more than 0.1% Integration time: 5 s Monochromator: High-speed Cerny-Turner No software Description has been adopted. You are welcome to come by for a viewing. We will be happy to arrange a cost-effective forwarding agent for you. organize You will receive a proper invoice. A net invoice can also be issued for foreign customers. Prerequisite is a valid VAT number. Subject to prior sale. Gsdpfx Akory Tqreajug Visit our store and have a look at our other offers. Company names and trademarks are the property of their owners and are used only to identify and describe the products. Deviations from technical data and errors in the description of the article may occur and are reserved.

Condition: used, Year of construction: 2021, operating hours: 4,000 h, functionality: fully functional, machine/vehicle number: 505 IE 2021, tank capacity: 300 l, usable tank capacity: 300 l, total length: 1,120 mm, total width: 1,120 mm, total height: 1,000 mm, inner diameter: 900 mm, outer diameter: 1,000 mm, overall weight: 400 kg, wall material: stainless steel, wall thickness: 25 mm, wall structure: double-walled, number of chambers: 1, manhole diameter: 500 mm, manhole location: front, reception height: 500 mm, discharge height: 500 mm, operating temperature: 10 °C, operating pressure: 3 bar, pressure (max.): 2.55 bar, power: 38 kW (51.67 HP), input voltage: 400 V, input current: 16 A, input frequency: 50 Hz, type of input current: three-phase, Equipment: CE marking, The core Thissen & Stecher TSRR series is primarily manufactured as an indirectly heated electric vessel. However, Thissen & Stecher designs for energy input from gas. The specific factory physical and structural dimensions for the TSRR 300-liter core chassis provide the official footprint for this unit: 📐 Structural Dimensions (300L Chassis) Internal Diameter: Ø 900 mm Internal Depth/Height: 500 mm External Width: 1,120 mm External Depth: 1,250 mm External Height: Approx. 1,000 mm to the lip (excluding top-mounted lid clearance/venting arrays). ⚖️ Weight: Net Weight (Empty): The baseline unit weight ranges between 380 kg and 450 kg, depending on the reinforced frame option and agitator configuration. Operating Weight (Full): Approx. 680 kg to 750 kg when loaded to its full 300L liquid capacity. 🔥 Gas Heating & Utility Requirements. Fitted with a gas burner jacket, the unit utilizes an indirect thermal jacket fluid or a direct-fired bottom array. Guodezzxcwepfx Akajg Thermal Power Output: Typically engineered between 38 kW and 44 kW to manage a rapid heat-up curve for a 300L volume. Gas Connection Port: 3/4 inch or 1 inch standard gas line connection. Electrical Supply (For Agitator): Requires a 3-phase 400V / 50Hz connection to power the bottom-driven heavy-duty scraping agitator. ⚙️ Operational Features: Agitator System: Bottom-driven stable agitator with standard stepless speed regulation from 10 to 60 RPM. Tilt Angle: Built with an integrated 5° oblique slope toward the front outlet valve to guarantee smooth product discharge and improved mixing geometry. Controller: Standard integration of the Aditec MIC 900 microprocessor supporting multi-step cooking programs.

Year of construction: 2013, condition: used, Rational SCC 201G gas convection oven Guodpfezu T Dcsx Akaeg In excellent working condition 20 GN 1/1

Condition: used, Cylinders, bottles used for gas transport 20/40/50 L, 200/300 bar Gusdpsyfpg Njfx Akajg T50 steel gas cylinder, bottle 50 L 200 bar 288 pieces T40 steel gas cylinder, bottle 40 L 200 bar 288 pieces T23 steel gas cylinder, bottle 20 L 300 bar 288 pieces All bottles are complete, empty and ready for export.

Year of construction: 2013, condition: good (used), for 40 GN pans * Steam cooking mode from 30 °C to 130 °C * Regeneration * Convection / dry heat: temperature range between 30 °C and 300 °C, 0–100% maximum humidity. * Probe Gsdpfezrk S Eox Akajug * Automatic cleaning with tablets

Condition: excellent (used), Year of construction: 1991, We can offer you CO2 carbon dioxide gas used storage tank vessel Volume 21050L; Godpfek Eac Dex Akaeug Working pressure 22 bar; Export from EU We also have other tanks for LIN, LOX, LAR, LNG and CO2, argon, oxygen, nitrogen and carbon dioxide, Hydrogen, Methane We would also be pleased to prepare an offer for you or provide you with further information. To discuss the possibilities, please contact us by phone or e-mail.

Condition: new, - Dimensions: 910 x 860 x 550 mm - Internal dimensions: 610 x 610 x 170 mm - Weight: 51 kg - Power: 8 kW - Power supply: Natural gas + 230V~ electrical connection - Capacity: 4 pizzas with a 30 cm diameter - Professional oven, ideal for pizzerias with high demand - Designed to offer efficiency, safety, and stability - Fast heat-up thanks to its specially designed chamber - Stable temperature even with heavy use (frequent opening and closing) Guedpfsy S R Ipjx Akasg - High-precision safety thermostat for reliable adjustment - Bakery-style door for easy loading and unloading - Natural gas consumption: 0.844 m³/h - Thermal power: 6880 kcal/h

Condition: new, Year of construction: 2021, functionality: fully functional, fuel type: gas, power: 854 kW (1,161.12 HP), output voltage: 400 V, output frequency: 50 Hz, motor manufacturer: MTU, =Scope of supply= Genset mtu 8V4000 GS 400 V Pump group Drycooler (radiator) HT/LT Exhaust system, silencer with valve Lubrication expansion tank Electrical control panel for engine, auxiliary systems, automatic protective circuit breaker Cogeneration module – hot water (400 kW) =Technical specifications= Gujdpfszmmzxjx Akajg Time for delivery - in stock Engine type - 8V4000L33 Electrical power - 854 kW Engine speed - 1500 rpm Total efficiency - 80 % Voltage - 400 V Frequency - 50 Hz =Other information= Production country - Germany

Condition: refurbished (used), functionality: fully functional, This excellently maintained Agilent 1200 HPLC system is ready for immediate use and provides a reliable solution for both routine and advanced chromatographic analyses. Annual preventive maintenance has been performed by certified Agilent Service Engineers. The final maintenance and qualification were performed in July 2026, during which the system successfully passed the inspection (PASS). Configuration: Agilent 1200 Solvent Tray Agilent 1200 Vacuum Degasser G1322A Agilent 1200 Quaternary Pump G1311A Agilent 1200 Series Standard Autosampler G1329A Agilent 1200 Thermostatted Column Compartment G1316A with integrated switching valve Agilent 1200 Series Diode Array Detector (DAD) G1315B PC with Windows 10 Agilent ChemStation CDS software included Godpfxozy Hldo Akaoug 6-month warranty Enjoy 25% off your first service when you sign up for a maintenance contract with us.

Condition: excellent (used), functionality: fully functional, Year of construction: 2002, operating hours: 4,724 h, load capacity: 4,000 kg, lifting height: 5,500 mm, free lift: 2,400 mm, load center: 600 mm, fuel type: gas, mast type: duplex, construction height: 3,600 mm, gearing type: hydrostat, fork carriage width: 1,380 mm, fork length: 1,200 mm, fork width: 150 mm, fork thickness: 50 mm, tire condition: 100 %, front tire type: cushion tires (black), front tire size: 200/50-10, rear tire type: cushion tires (black), rear tire size: 27X10-12, overall weight: 10,100 kg, empty load weight: 6,100 kg, total height: 2,450 mm, total length: 2,300 mm, total width: 2,250 mm, color: yellow, Equipment: CE marking, all wheel drive, cabin, lighting, pallet forks, sideshift, USED FORKLIFTS WITH QUALITY GUARANTEE – FT LOGISTICS 🚜🔧 💼 Years of experience | In-house service & paint shop | Expert consultation | Pan-European transport | After-sales support Looking for a forklift you can rely on? 🤝 We are a reputable European dealer of new and used forklifts. From small businesses to international facilities – our machines ensure dependable and efficient logistics. ⚙️ 🌟 Why Choose FT Logistics ✅ Every forklift undergoes comprehensive technical servicing – inspection, testing, oil & filter changes, major component overhauls ✅ UDT certification available upon request ✅ In-house workshop & paint shop – forklifts reconditioned both visually and mechanically ✅ Own transport fleet across Europe 🚛 ✅ Operator training & on-site functional testing upon delivery ✅ After-sales technical support – we’re here for you even after the purchase ✅ Machine viewing & testing available at our headquarters ✅ Financing assistance via top leasing partners Gujdpfx Akjzzfkhsajg ✅ Invoice in EUR or PLN 💶 🔩 AVAILABLE MODEL: COMBILIFT C4000 – Four-way / Multidirectional Forklift / Multidrive System ✅ Year: 2002 ✅ Operating hours: 4,724 h ✅ Drive: GAS ⛽ ✅ Capacity: 4,000 kg ✅ Mast: Duplex – 4,500 mm ✅ Fork positioner: 1,380 mm | Forks: 1,200 mm ✅ Superelastic tyres – 100% ✅ Free lift: 2,400 mm ✅ Condition: Excellent – after major service ✅ Appearance: Clean, corrosion-free, ready for work 📏 Dimensions: Height: 2,450 mm | Length: 2,300 mm | Width: 2,250 mm | Positioner: 1,320 mm | Overall height: 3,600 mm 🚀 Ideal For: 🏭 Narrow aisle warehouses 🪵 Wood, steel & pipe sectors 📦 Handling long loads 🏗️ Indoor & outdoor operations FT Logistics – Quality you can count on. Service you can trust. 💙

Condition: excellent (used), functionality: fully functional, Year of construction: 2002, operating hours: 4,724 h, load capacity: 4,000 kg, lifting height: 5,500 mm, free lift: 2,400 mm, load center: 600 mm, fuel type: gas, mast type: duplex, construction height: 3,600 mm, gearing type: hydrostat, fork carriage width: 1,380 mm, fork length: 1,200 mm, fork width: 150 mm, fork thickness: 50 mm, tire condition: 100 %, front tire type: cushion tires (black), front tire size: 200/50-10, rear tire type: cushion tires (black), rear tire size: 27X10-12, overall weight: 10,100 kg, empty load weight: 6,100 kg, total height: 2,450 mm, total length: 2,300 mm, total width: 2,250 mm, color: yellow, Equipment: CE marking, all wheel drive, cabin, lighting, pallet forks, sideshift, USED FORKLIFTS WITH QUALITY GUARANTEE – FT LOGISTICS 🚜🔧 💼 Years of experience | In-house service & paint shop | Expert consultation | Pan-European transport | After-sales support Looking for a forklift you can rely on? 🤝 We are a reputable European dealer of new and used forklifts. From small businesses to international facilities – our machines ensure dependable and efficient logistics. ⚙️ 🌟 Why Choose FT Logistics ✅ Every forklift undergoes comprehensive technical servicing – inspection, testing, oil & filter changes, major component overhauls ✅ UDT certification available upon request ✅ In-house workshop & paint shop – forklifts reconditioned both visually and mechanically ✅ Own transport fleet across Europe 🚛 Gusdpfjzxhw Esx Akaog ✅ Operator training & on-site functional testing upon delivery ✅ After-sales technical support – we’re here for you even after the purchase ✅ Machine viewing & testing available at our headquarters ✅ Financing assistance via top leasing partners ✅ Invoice in EUR or PLN 💶 🔩 AVAILABLE MODEL: COMBILIFT C4000 – Four-way / Multidirectional Forklift / Multidrive System ✅ Year: 2002 ✅ Operating hours: 4,724 h ✅ Drive: GAS ⛽ ✅ Capacity: 4,000 kg ✅ Mast: Duplex – 4,500 mm ✅ Fork positioner: 1,380 mm | Forks: 1,200 mm ✅ Superelastic tyres – 100% ✅ Free lift: 2,400 mm ✅ Condition: Excellent – after major service ✅ Appearance: Clean, corrosion-free, ready for work 📏 Dimensions: Height: 2,450 mm | Length: 2,300 mm | Width: 2,250 mm | Positioner: 1,320 mm | Overall height: 3,600 mm 🚀 Ideal For: 🏭 Narrow aisle warehouses 🪵 Wood, steel & pipe sectors 📦 Handling long loads 🏗️ Indoor & outdoor operations FT Logistics – Quality you can count on. Service you can trust. 💙

Condition: refurbished (used), functionality: fully functional, pump pressure: 400 bar, This excellently maintained Agilent 1100 HPLC system is ready for immediate use and provides a reliable solution for both routine and advanced chromatographic analyses. Annual preventive maintenance has been performed by certified Agilent Service Engineers. The last maintenance was performed in July 2026, during which the system successfully passed the inspection. Configuration: Agilent 1100 Solvent Tray Agilent 1100 Vacuum Degasser G1322A Agilent 1100 Quaternary Pump G1311A Agilent 1100 Standard Autosampler G1329A Agilent 1100 Thermostated Column Compartment G1316A Agilent 1100 Variable Wavelength Detector (VWD) G1314A Agilent 1100 Controller G1323B Godpfx Ajzzdxqskajug 3-month warranty 3-month warranty

Condition: new, functionality: fully functional, fuel type: gas, power: 1,521 kW (2,067.98 HP), output voltage: 400 V, output frequency: 50 Hz, rotational speed (max.): 1,500 rpm, motor manufacturer: MTU, 9 pcs in stock =Scope of supply= Guedpsy Hcvbefx Akaog Genset mtu 12V4000L64FNER, 400 V for operation with Natural Gas. gas train of 116-250 mbar inlet pressure with 1m flexible rubber-metal connecting hose. set of sylomer stripes for genset foundation installation. set of flexible connection for engine coolant circuit with flange connection set of flexible connection for mixture coolant circuit with flange connection set of exhaust bellows with flange connection and companion flange set Maintenance-free starter batteries, mounted on base frame. MIP (MTU Interface Panel) incl. Black Start option and ECU Remote Control interface =Technical specifications= Time for delivery - in stock Engine type - mtu 12V4000L64FNER Electrical power - 1521 kW Engine speed - 1500 rpm Electrical efficiency - 43.9 % Total efficiency - 88.6 % Alternator type - Leroy Somer LSA 53.2 VL6 Voltage - 400 V Frequency - 50 HZ < 500mg NOx at 5% O2 =Other information= Production country - Germany

Condition: good (used), Glasbeek Finish Gas Chamber Furnace Type 003.05 Glasbeek finish Gas chamber furnace Type 003.05 With loading trolley Maximum temperature 200 ° C Approximate inside dimensions (B1900mm x T2950mm x H1800mm) Financing through our bank is also possible. Guedpfed Spx Dsx Akaeg komplett-konzept.leasingo.de More articles - new and used - can be found in our shop! International shipping costs on request!

Condition: ready for operation (used), Year of construction: 2007, operating hours: 20,700 h, pressing force: 337 t, total width: 2,200 mm, total height: 3,715 mm, overall weight: 24,000 kg, travel distance X-axis: 800 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 610 mm, controller manufacturer: DELEM, controller model: DA-66W, product length (max.): 5,100 mm, number of axes: 6, This 6-axis GASPARINI PSG 330/4000 Variante C was manufactured in 2007. It features a bending force of 330 tons and a useful bending length of 4100 mm. The machine includes a stroke of 400 mm and an X-axis travel of 800 mm. If you are looking to get high-quality bending capabilities, consider the GASPARINI PSG 330/4000 Variante C press brake we have for sale. Contact us for further details. - Bending Force / Press Capacity: 330 Ton / 3300 kN- Usable Bending Length: 4100 mm- Distance Between Uprights: 3600 mm- Stroke / Y-Axis Travel: 400 mm- Installation Height / Daylight: 600 mm- Throat / Ausladung: 500 mm- Approach Speed: 0 - 200 mm/s- Return Speed: 0 - 125 mm/s- Working Speed: 0 - 8.5 mm/s- X-Axis Speed: 300 mm/s- X-Axis Accuracy: ±0.05 mm- R-Axis Stroke / Travel: 250 mm- R-Axis Speed: 160 mm/s- R-Axis Accuracy: ±0.1 mm- Z-Axis Speed (Option): 1000 mm/s- Z-Axis Accuracy (Option): ±0.25 mm- Z-Axis Repeatability (Option): ±0.15 mm- Motor Power: 30 kW- Power Supply: 400V / 50Hz- Oil Tank Capacity: 420 L- Recommended Hydraulic Oil: Shell Tellus Oil TX 46- Machine Weight: ca. 24 Ton (23 t on nameplate)- Table Width: 90 mm- Working Height: 965 mm- Hydraulic Components: Rexroth- Electrical Components: Telemecanique- Pneumatic Components: SMC- Control Unit CNC: Delem DA-66W- Safety System: Nuova Elettronica DFS Laser Beam - RX (Type 4 Safety Device)- CNC controlled Z1-Z2-Z5 with 6-axis control DA - 66 W- Tool holder with upper and lower jaw clamping system Gedpfoy U Hwrex Akaeug Technical Specification Bending Length 4100 mm

Condition: used, Year of construction: 2012, operating hours: 5,600 h, load capacity: 5,000 kg, lifting height: 6,000 mm, fuel type: gas, gearing type: automatic, Equipment: cabin, head guard, LINDE H50T-01 FORKLIFT TRUCK GAS SYSTEM | TRIPLEX | GRAMMER CABIN | SINGLE OWNER SINGLE OWNER YEAR OF MANUFACTURE: 2012 LOAD CAPACITY: 5,000 kg UNLADEN WEIGHT: 7,040 kg ENGINE POWER: 55 kW OPERATING HOURS: 5,600 LIQUEFIED PETROLEUM GAS (GAS SYSTEM) TRIPLEX MAST HYDRAULIC CONNECTIONS AUTOMATIC TRANSMISSION GRAMMER DRIVER'S CABIN HEATER SIDE DOOR AVAILABLE (NEVER USED) LIGHTING GOOD TIRES IMMEDIATELY READY FOR OPERATION Gusdpjyqdldefx Akaeg EXPORT SALES ONLY WITH DEPOSIT MINIMUM €500 – €2,000 EXPORT DECLARATION CUSTOMS EXW IN 10 MIN. (APPROVED EXPORTER) 5 DAYS, 30 DAYS PLATES AND 17 – 21 DAYS AUSTRIAN PLATES EURO 1 VEHICLE RESERVATIONS EXCLUSIVELY VIA EMAIL FUNCTION VERBAL RESERVATIONS ARE NOT VALID! For sales to the EU and third countries, a deposit of at least €500 / €1,000 will be charged. Subject to changes, errors, and prior sale! You can find more vehicles on our homepage: Sale takes place exclusively according to our terms and conditions – see homepage. Important note – Important information: Despite careful verification of all details in our offer, errors may still occur. Some of these errors result from transmission faults across different platform providers. Therefore, all details are provided without guarantee and do not represent any legal claim. Legal: This sales advertisement does not constitute an offer in the sense of §145 BGB. Instead, it provides information to initiate a contract. All information provided is without guarantee and does not constitute guaranteed characteristics.

Condition: ready for operation (used), Year of construction: 2010, operating hours: 1,22,000 h, functionality: fully functional, power: 250 kW (339.91 HP), number of cylinders: 8, Used combined heat and power (CHP) unit, manufactured in 2010, for sale, complete with container. MAN gas engine overhauled in 2024 (proof of overhaul available in the form of an invoice). Gjdpfx Akjzkwc Ijaoug