2019 Product Guide About Us Table of Contents
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Experiment 5: Molar Volume of a Gas (Mg + Hcl)
1 CHEM 30A EXPERIMENT 5: MOLAR VOLUME OF A GAS (MG + HCL) Learning Outcomes Upon completion of this lab, the student will be able to: 1) Demonstrate a single replacement reaction. 2) Calculate the molar volume of a gas at STP using experimental data. 3) Calculate the molar mass of a metal using experimental data. Introduction Metals that are above hydrogen in the activity series will displace hydrogen from an acid and produce hydrogen gas. Magnesium is an example of a metal that is more active than hydrogen in the activity series. The reaction between magnesium metal and aqueous hydrochloric acid is an example of a single replacement reaction (a type of redox reaction). The chemical equation for this reaction is shown below: Mg(s) + 2HCl(aq) è MgCl2(aq) + H2(g) Equation 1 When the reaction between the metal and the acid is conducted in a eudiometer, the volume of the hydrogen gas produced can be easily determined. In the experiment described below magnesium metal will be reacted with an excess of hydrochloric acid and the volume of hydrogen gas produced at the experimental conditions will be determined. According to Avogadro’s law, the volume of one mole of any gas at Standard Temperature and Pressure (STP = 273 K and 1 atm) is 22.4 L. Two important Gas Laws are required in order to convert the experimentally determined volume of hydrogen gas to that at STP. 1. Dalton’s law of partial pressures. 2. Combined gas law. Dalton’s Law of Partial Pressures According to Dalton’s law of partial pressures in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases. -
Use of Laboratory Equipement
USE OF LABORATORY EQUIPEMENT C. Laboratory Thermometers Most thermometers are based upon the principle that liquids expand when heated. Most common thermometers use mercury or colored alcohol as the liquid. These thermometers are constructed as that a uniform-diameter capillary tube surmounts a liquid reservoir. To calibrate a thermometer, one defines two reference points, normally the freezing point of water (0°C, 32°F) and the boiling point of water (100°C, 212°F) at 1 tam of pressure (1 tam = 760 mm Hg). Once these points are marked on the capillary, its length is then subdivided into uniform divisions called degrees. There are 100° between these two points on the Celsius (°C, or centigrade) scale and 180° between those two points on the Fahrenheit (°F) scale. °F = 1.8 °C + 32 The Thermometer and Its Calibration This section describes the proper technique for checking the accuracy of your thermometer. These measurements will show how measured temperatures (read from thermometer) compare with true temperatures (the boiling and freezing points of water). The freezing point of water is 0°C; the boiling point depends upon atmospheric pressure but at sea level it is 100°C. Option 1: Place approximately 50 mL of ice in a 250-mL beaker and cover the ice with distilled water. Allow about 15 min for the mixture to come to equilibrium and then measure and record the temperature of the mixture. Theoretically, this temperature is 0°C. Option 2: Set up a 250-mL beaker on a wire gauze and iron ring. Fill the beaker about half full with distilled water. -
Thomas Brand and Labforce Products
Thomas Brand and labForce Products thomassci.com 800.345.2100 [email protected] For Latin Ameríca Thomas Scientic, LLC Family of Companies Phone: +1 786.314.7142 Address: MIAMI, FL 33182 1800 NW 135 Ave # 104 Email: [email protected] Table of Contents Equipment Supplies Balances .......................................................................... Pages 3 - 4 Bottles ............................................................................ Pages 9 -12 Bottle Top Filters ................................................................Page 12 Dry Baths .................................................................................Page 4 Jars .........................................................................................Page 12 Hot Plates/Hot Plate Stirrers .........................................Page 4-5 Jugs ....................................................................................... Page 13 Lab Lifts ...................................................................................Page 5 Microscope Slides/Cover Glass ..............................Page 13 - 14 Petri Dishes ..........................................................................Page 14 Laboratory Seating ...............................................................Page 6 Pipet Tips...................................................................... Page 14 - 15 Microscopes .......................................................................Page 6-7 Plates .....................................................................................Page -
Ear and Forehead Thermometer
Ear and Forehead Thermometer INSTRUCTION MANUAL Item No. 91807 19.PJN174-14_GA-USA_HHD-Ohrthermometer_DSO364_28.07.14 Montag, 28. Juli 2014 14:37:38 USAD TABLE OF CONTENTS No. Topic Page 1.0 Definition of symbols 5 2.0 Application and functionality 6 2.1 Intended use 6 2.2 Field of application 7 3.0 Safety instructions 7 3.1 General safety instructions 7 3.3 Environment for which the DSO 364 device is not suited 9 3.4 Usage by children and adolescents 10 3.5 Information on the application of the device 10 4.0 Questions concerning body temperature 13 4.1 What is body temperature? 13 4.2 Advantages of measuring the body tempera- ture in the ear 14 4.3 Information on measuring the body tempera- ture in the ear 15 5.0 Scope of delivery / contents 16 6.0 Designation of device parts 17 7.0 LCD display 18 8.0 Basic functions 19 8.1 Commissioning of the device 19 8.2 Warning indicator if the body temperature is 21 too high 2 19.PJN174-14_GA-USA_HHD-Ohrthermometer_DSO364_28.07.14 Montag, 28. Juli 2014 14:37:38 TABLE OF CONTENTS USA No. Topic Page 8.3 Backlighting / torch function 21 8.4 Energy saving mode 22 8.5 Setting °Celsius / °Fahrenheit 22 9.0 Display / setting time and date 23 9.1 Display of time and date 23 9.2 Setting time and date 23 10.0 Memory mode 26 11.0 Measuring the temperature in the ear 28 12.0 Measuring the temperature on the forehead 30 13.0 Object temperature measurement 32 14.0 Disposal of the device 33 15.0 Battery change and information concerning batteries 33 16.0 Cleaning and care 36 17.0 “Cleaning” warning indicator 37 18.0 Calibration 38 19.0 Malfunctions 39 20.0 Technical specification 41 21.0 Warranty 44 3 19.PJN174-14_GA-USA_HHD-Ohrthermometer_DSO364_28.07.14 Montag, 28. -
Science Equipment
Block Heaters with BioCote Science Equipment Colony Counter Homogenisers ® Hotplates and Stirrers protection antimicrobial Incubators Melting Point Apparatus Stuart Mixers ® Catalogue Rotary Evaporators Rockers and Shakers Water Baths and Purification Page 1 Bibby Scientific Limited Some of the most famous names in science... As one of the largest broad based manufacturers of benchtop laboratory equipment worldwide, Bibby Scientific Ltd provides internationally recognised brands with reputations for product quality and high performance. These four famous brands are now brought together in a single package to offer an excellent level of quality, service and support. Electrothermal® are the newest addition to the Bibby Scientific portfolio and are market leaders in heating mantle design and manufacture. The extensive Electrothermal® range includes controlled, stirring, Bunsen and spill-proof mantles in various shapes and capacities. Alongside the heating mantle range, Electrothermal® offer an extensive selection of stirrers and melting point apparatus. Jenway® manufactures a wide range of analytical scientific instruments including UV/Vis spectrophotometers, flame photometers, colorimeters, portable and laboratory meters for the measurement of dissolved oxygen, pH, conductivity and specific ions. The extensive Stuart® range includes blood tube rotators, colony counters, hotplates, hybridisation ovens, rockers, shakers, stirrers and water purification systems. Techne® is a world leader in the manufacture of temperature control equipment, -
The Magic Motion
The Magic Motion www.wiggens.com Rotary Evaporators Pumps Stirrers Heating Shakers Homogenizers Incubators Gas Generators About WIGGENS Wiggens was established in 2005 with the goal delivering the best laboratory equipment and service for reliable results, since then Wiggens has been producing top-quality general laboratory equipment, our brand Wiggens stands for high quality, durability and remarkable performance. Wiggens is your general laboratory companion and provides products that can be used in all kinds of laboratory environments. The Wiggens product range entails an extensive range of magnetic stirrers, heating mantles and dry baths. Advanced infrared hot plates with integrated stirring functions for an even heat distribution among your solvents are also available, in addition Wiggens also provides overhead stirrers with diverse characteristics to perfectly match the laboratory stirring and blending requirements. A complete range of new products in 2017 including homogenizers of different magnitudes as well as a broad range of shakers, multi-purpose heaters, colony counters. incubators, ovens and shaking incubators for full temperature control. ChemVak is your brand specializing in vacuum technology offering an extensive range of vacuum pumps for all applications, including chemical-resistant diaphragm pumps and oil-free piston pumps, are complemented by vacuum filtration equipment for a wide range of different applications. In addition, water-jet aspirator pumps and bio-suction systems are part of the product range. In 2017, Wiggens launched its whole range gas generators with Vgas product band, the new Vgas product line rounds out our product solutions as a specialist in vacuum and gas related operations. ChemTron is your brand for chemical reaction solutions, Biotron for highly qualified bio-equipment and Vdose specialized in liquid handling pumps, completes the range of brands within the Wiggens family. -
VIP® Gold for Listeria
VIP® Gold for Listeria AOAC Official Method 997.03 AOAC Performance Tested Method 060801 Part No: 60037-40 (40 tests) General Description VIP® Gold for Listeria is a single-step visual immunoassay for the detection of Listeria in food and environmental samples. Each device contains a proprietary reagent system, which forms a visually apparent antigen-antibody- chromogen complex if Listeria is present. The test is intended for use by laboratory personnel with appropriate microbiology training. Kit Components Each VIP® Gold for Listeria kit contains the following: VIP® Gold for Listeria test devices Equipment / Materials Required Other necessary materials not provided include: Media per Appendix A Autoclave Vortex mixer Analytical balance, tolerance ± 0.2 g Stomacher / Masticator machine Stomacher-type bags with filter or equivalent Incubator capable of maintaining 29–31 °C Water bath capable of maintaining 95–105 °C or equivalent (e.g. autoclave with flowing steam, dry heater) Micropipette(s) capable of delivering 0.1 mL and 1.0 mL Sample Preparation A. Test Portion Preparation & Enrichment Two Step Enrichment Protocol (AOAC OMA 997.03) for meat, poultry, seafood, vegetables, dairy products, eggs, pasta, animal meal, nuts and environmental samples. a. Food samples Add 25 g test portion to 225 mL of modified Fraser Broth with lithium chloride (mFB+LiCl) (Appendix A). Stomach / masticate for 2 min and incubate 28 h (26–30 h) at 30 °C (29–31 °C). b. Environmental samples Add 60 mL of mFB+LiCl to sample bag containing environmental sponge sample. Ensure that the sponge is oriented horizontally in the sample bag. If using a swab, add environmental swab sample to 10 mL of mFB+LiCl. -
Kimberly Clark
The International Sales Department serves customers throughout the world from our home office in Swedesboro, New Jersey. We also have the invaluable support of an extensive network of distributors in most countries, ready to answer your inquiries and provide professional service before and after sale. Specific requirements for voltage and frequency can be handled. Export documentation is given personalized attention and our multi-lingual staff can handle all of your questions or product needs. Through Thomas Scientific Supply Chain Capabilities of you will have access to: Thomas Scientific International • Large product portfolio: • Direct distribution agreements with thousands Instruments and equipment, supplies of manufacturers of laboratory equipment and consumables, chemicals and reagents, and supplies safety products • Experience with reseller support • Access to 1,300 different suppliers and compensation • Products for every market: • Long-standing business relationships Industrial, Life Science, etc. with experienced freight forwarders • Excellent customer service • More than 100 years of experience exporting laboratory supplies and equipment globally • On-time delivery • Experienced with documentation and packing • Responsive Management requirements of hazardous chemicals • Name Brand products • Preparing quotation • Comprehensive website • Process orders • Real time availability and pricing on the web • Preparing export documentation • Fair price • Ability to provide order status • Fully integrated state of the art ERP • INCO terms -
MS-3000 and MMS-3000, Magnetic Stirrers
Magnetic Stirrers, Overhead Stirrer MS-3000 and MMS-3000, Magnetic Stirrers MS-3000 and MMS-3000 are compact magnetic stirrers with stainless steel working surface. Units provide stirring of liquids with rotation speed of magnetic element up to 3,000 rpm. Up to date it is the highest value of the maximal speed for magnetic MS-3000 stirrers of global producers. Strong magnets hold the driven magnetic element firmly in the magnetic clutch. Stirring is performed without undesirable heating and noise. Enclosures of stirrer MS-3000 are made of strong steel and DESCRIPTION painted with powder enamel, which is chemically resistant to acids and alkali. The stirrers are supplied with a cylinder-shape magnetic stir- ring bar (6 × 25 mm) encapsulated in PTFE for universal use. MMS-3000 is equipped with a detachable stand for supporting various sensor elements (temperature, pH and others) inside the stirred liquid. Magnetic stirrer is ideal laboratory instrument for PH-metering, extraction and dialysing with the small quantities of substances. Operation temperature range +4°С to +40°С (from cold rooms to incubators) at maximal relative humidity 80%. Catalogue NUMBER: Cat. number MS-3000 BS-010301-AAF Basic Plus Product Class MS-3000 blue (on request) BS-010301-ABF MMS-3000 BS-010305-AAF Optional accessories for MMS-3000: Holder for temperature probe (see page 77) BS-010309-FK MMS-3000 with a stand MS-3000 Magnetic Stirrers, Overhead Stirrer MS-3000 and MMS-3000, Magnetic Stirrers MS-3000 MMS-3000 S Speed control range 0–3,000 rpm pecifications Stirring volume up to (H2O) 5 litres 20 litres Working surface material Stainless steel SR-1, attachable stand size — Ø8 × 320 mm Max. -
Galactomannan
www.megazyme.com GALACTOMANNAN ASSAY PROCEDURE K-GALM 03/20 (100 Assays per Kit) © Megazyme 2020 INTRODUCTION: Galactomannans occur in nature as the reserve polysaccharides in the endosperms of a wide range of legume seeds. These polysaccharides, in partially purified form, find widespread application as thickening and gelling (in the presence of other polysaccharides) agents in the food industry. Partially degraded guar galactomannan is used as a novel dietary fiber component. Galactomannan is composed of a 1,4-β-linked D-mannan backbone to which single D-galactosyl units are attached to C-6 of some of the D-mannosyl residues. The major difference between galactomannans from different seed species is the ratio of D-galactose to D-mannose. However, some variation in the molecular weight of the galactomannans has also been reported. The D-galactose:D-mannose ratio of galactomannan from different varieties of a given seed species appears to be remarkably constant. In a detailed study of galactomannans, purified from approx. 50 samples of carob flour from diverse sources and from a range of carob varieties, it was shown that the D-galactose:D-mannose ratio is constant, i.e. 22 ± 1% (w/w) D-galactose and 78 ± 1% (w/w) D-mannose.1 In a parallel study on the galactomannan from guar seed varieties, a D-galactose content of 38 ± 1% (w/w) and D-mannose content of 62% ± 1% (w/w) was found. This observation would also appear to hold true for galactomannan from other seeds, e.g. fenugreek seed, but in these cases the studies have not been as comprehensive. -
High Torque Overhead Stirrer Digital / Analog Magnetic Stirrer Digital Compact Hotplate Stirrer ŦŦŦŦŦŦŦŦŦŦŦŦŦP. 14
- Smart Design of Body made by Aluminum Die-Casting (MS, MSH models) - Digital LCD Display for RPM, Power Bar Graph and Status - User ůs Self -Compensation Function : to Control Difference between Real Temp. and Indicated Temp. ( ž20.0 Ɖ) (MSH model) - Patented Jog-Shuttle Control system and Digital LCD with Back-light (Digital Model) - Chrome-Plated & Stainless Steel Chuck - Prevention from Corrosion (HS, HT models) - High-Speed and High-Torque Overhead Stirrer with Powerful DC Motor Digital Compact Hotplate Stirrer ŦŦŦŦŦŦŦŦŦŦŦŦŦ P. 146 Digital Magnetic Stirrer ŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦ P. 141, 142 Hotplate Stirrer ŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦ P. 143~147 Multi-point Magnetic Stirrers ŦŦŦŦŦŦŦŦŦŦŦŦŦŦ P. 142 Premium Magnetic Stirrer ŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦ P. 140 Systematic Multi-Hotplate Stirrers ŦŦŦŦŦŦŦŦŦŦŦŦ P. 147 High-Speed Analog Overhead Stirrers ŦŦŦŦŦŦŦŦŦŦŦ P. 150 High-Speed Digital Overhead Stirrer ŦŦŦŦŦŦŦŦŦŦŦŦ P. 151 High-Speed Digital Overhead Stirrer, with Remote Controller ŦŦŦ P. 152 High-Torque Analog Overhead Stirrer ŦŦŦŦŦŦŦŦŦŦŦ P. 153 High-Torque Digital Overhead Stirrer ŦŦŦŦŦŦŦŦŦŦŦŦ P. 154 High-Torque Digital Overhead Stirrer, with Remote Controller ŦŦŦ P. 155 Standard Accessories for WiseStir ˓ Overhead Stirrers ŦŦŦ P. 156, 157 Digital Jar Tester ŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦŦ P. 158 Digital / Analog Magnetic Stirrer High Torque High Speed Overhead Stirrer Overhead Stirrer MS-20D MS-20A Multi-point Magnetic Stirrers HT-50DX MS-MP8 : 8-Point Stirrer 140 HS-30D-Set Stirrers, Magnetic St Cat. No Description Articles Űwiteg űWiseStir ˓ MS-A Premium Magnetic Stirrer -
Infrared Forehead Thermometer (4DET-306) Quick Start Guide
Infrared Forehead Thermometer (4DET-306) Quick Start Guide To take a forehead temperature: 1” (2-3cm) 1 Press the power button , wait for 2 beeps. 2 Aim the thermometer at the center of the forehead about 1 inch (2-3 cm) from the skin and press the start button S T A R T . 2 START If the body temperature is below 100°F (38.7°C) you will hear one short beep and a 1 happy face will appear on the display. If the body temperature is above 100°F (38.7°C) you will hear one long beep followed by three short beeps and a sad face will appear on the display. Detailed instructions are included in the packaging Temperature Taking Hints and Tips • All body site temperatures are not the same. The • Temporal artery temperature changes faster than a temperature taken at different sites on the body will vary temperature taken rectally, orally or under the arm. A significantly. A forehead (temporal) temperature, for difference of 1°F (.6°C) is normal. Body temperature can example, is usually 0.5°F (0.3°C) to 1.0°F (0.6°C) lower change throughout the day. than an oral temperature. • Consistently low temperature readings may be caused by a • Make certain the thermometer is in FOREHEAD MODE. dirty instrument window. Use an alcohol wipe or a cotton • Non-contact infrared thermometers measure surface swab moistened with alcohol (70% isopropyl) to clean the temperature. Hold the device approximately 1 inch (2-3 instrument window and housing. Gently wipe and let air dry.