Food Chemistry Experiments - Print and E-Book

Le spectrophotomètre Go Direct SpectroVis Plus mesure rapidement un spectre de longueur d'onde complète. Il se connecte directement à votre plateforme sans fil via Bluetooth® ou câblé via USB. Initiez vos élèves à la spectroscopie à l'aide du spectrophotomètre Go Direct SpectroVis Plus à prix abordable. Cet appareil, qui peut se connecter sans fil ou par USB, peut facilement recueillir un spectre de longueur d'onde complète (absorbance, pourcentage de transmission ou intensité) en moins d'une seconde. Une fois la longueur d'onde de crête déterminée, vous pouvez établir la concentration d'une solution (loi de Beer) ou surveiller les vitesses des réactions. Le spectrophotomètre Go Direct SpectroVis Plus permet d'utiliser le spectrophotomètre Go Direct SpectroVis Plus pour les laboratoires à petite échelle et les applications biochimiques avec micro et semi-micro cuvettes. Le spectrophotomètre Go Direct SpectroVis Plus peut être utilisé pour diverses expériences de spectroscopie: Déterminer la longueur d'onde de crête pour recueillir des données sur la concentration de la solution en vue d'études de la loi de Beer ou pour surveiller les vitesses de réaction. Recueillir un spectre de longueur d'onde complète pour mesurer l'absorbance, le pourcentage de transmittance, la fluorescence (à 405 nm ou 500 nm d'excitation) ou les émissions. Effectuer des expériences de cinétique enzymatique. Effectuer des études d'équilibre de l'absorbance en fonction du temps ou de l'absorbance en fonction de la concentration. Effectuer des bioessais colorimétriques ou fluorescents. Utilisez le spectrophotomètre à fibre optique (VSP-FIBER) pour mesurer les émissions provenant d'essais de flamme ou d'autres sources lumineuses. Pour une analyse plus détaillée des émissions, considérez le spectromètre d'émission Vernier (VSP-EM). Spectroscopie avec Go Direct SpectroVis Plus Pour utiliser le spectrophotomètre Go Direct SpectroVis Plus, téléchargez l'application gratuite Analyse spectrale. L'application est compatible avec les ordinateurs, les Chromebooks et les appareils mobiles. Les élèves peuvent aussi se connecter à LabQuest 2 ou à un ordinateur avec Logger Pro pour effectuer des analyses. Spécifications Gamme de longueurs d'onde: 380 nm-950 nm Support pour la fluorescence: Deux sources d'excitation centrées à 405 nm et 500 nm Intervalle de longueur d'onde signalé: ~1 nm entre les valeurs signalées (collecte de 570 valeurs) Dimensions: 16 cm x 10 cm x 5 cm Sources lumineuses: Ampoule blanche à incandescence, durée de vie d'environ 8 000 heures, étalonnage en une seule étape. À DEL, durée de vie d'environ 100 000 heures. Aucune alimentation extérieure n'est requise.

The Go Direct Conductivity Probe determines the ionic content of an aqueous solution by measuring its electrical conductivity. It directly connects wirelessly via Bluetooth® or wired via USB to your platform. Go Direct Conductivity Probe determines the ionic content of an aqueous solution by measuring its electrical conductivity. It features a built-in temperature sensor to simultaneously read conductivity and temperature. Automatic temperature compensation allows students to calibrate the probe in the lab and then make measurements outdoors without temperature changes affecting data. This temperature compensation can be turned off to perform conductivity studies as a function of temperature. The Go Direct Conductivity Probe has a range of 0 to 20,000 μS/cm to provide optimal precision in any given range. An alternating current at its electrodes prevents polarization and electrolysis, reducing contamination of solutions. Its ABS-body graphite electrode resists the corrosion typical in metal electrodes. The Go Direct Conductivity Probe can be used in a variety of experiments: Demonstrate diffusion of ions through membranes. Investigate the difference between ionic and molecular compounds, strong and weak acids, or ionic compounds that yield different ratios of ions. Measure Total Dissolved Solids (TDS). Specifications: Range: 0 to 20,000 μS/cm (0 to 10,000 mg/L TDS) Temperature compensation: Automatic from 5 to 35°C, can be turned off Temperature range (can be placed in): 0 to 80°C Cell constant: 1.0 cm-1 Description: ABS body, parallel carbon (graphite) electrodes Dimensions: 12 mm OD and 120 mm length Connections: Wireless: Bluetooth Wired: USB Included Go Direct Conductivity Probe Micro USB Cable

The Go Direct ORP (Oxidation-Reduction Potential) Sensor measures the ability of a solution to act as an oxidizing or reducing agent. It directly connects wirelessly via Bluetooth® or wired via USB to your platform. Use the Go Direct ORP Sensor to measure the ability of a solution to act as an oxidizing agent and to quantify ion activity. This sensor measures the capacity of a solution to either release or accept electrons from chemical reactions. This sensor is comprised of an ORP electrode connected to a Go Direct Electrode Amplifier via a BNC connector. This design enables you to use the Go Direct Electrode Amplifier with other Vernier electrodes, such as the pH Electrode, Flat pH Electrode, ORP Electrode, ISE electrode, or a third-party electrode. The Go Direct ORP Sensor can be used in a variety of experiments: Determine the equivalence point of an oxidation-reduction titration. Measure the oxidizing ability of chlorine in swimming pools. Investigate the ORP of drinking water. Specifications: ORP Electrode Type: Sealed, gel-filled, epoxy body, Ag/AgCl reference Storage solution: pH-4/KCl solution (10 g KCl in 100 mL buffer pH-4 solution) ORP element: 99% pure platinum band sealed on a glass stem Temperature range: 0 to 60°C 12 mm OD Impedance: ~20 kΩ at 25ºC Electrode Amplifier Units: mV Input range: ±1000 mV Connections: Wireless: Bluetooth Wired: USB Included: Go Direct ORP (includes Go Direct Electrode Amplifier) Micro USB Cable

Description Monitor changes in carbon dioxide, temperature, and relative humidity easily with the Go Direct CO2 Gas Sensor. This sensor includes built-in temperature compensation and humidity protection. A 250 mL Nalgene bottle is included for running controlled experiments with small plants and animals.  The Go Direct CO2 Gas Sensor is ideal for the following experiments: Measure the change in gas concentration during cellular respiration. Measure the change in gas concentration during photosynthesis. Study the effect of temperature on cell respiration or metabolism of organisms. Investigate artificial selection in yeast by comparing respiration rates of different strains. Rechargeable Battery—Ready When You Are The robust rechargeable battery offers long battery life and provides always-ready operation when using the sensor wirelessly. Monitor battery life directly from our free Graphical Analysis™ 4 app or LabQuest 2 App. Should the battery run low, simply connect the sensor to the charging cable and keep on collecting—no interruptions or inconvenience to you or your students. Wired or Wireless—The Flexibility to Choose Our Go Direct sensors connect directly to your mobile device, Chromebook™, or computer using our free Graphical Analysis™ 4 app—no additional equipment or software purchases are necessary. Go Direct sensors can be used wired via USB or wirelessly via Bluetooth® wireless technology, allowing you to choose the solution best for your classroom or laboratory.

Its unique vertical layout and lack of custom glassware make this polarimeter very student friendly. In addition, the analyzer is automatically rotated by an internal motor giving students more time to understand experiments such as the reaction kinetics of HCl and sucrose. The 589 nm LED makes it ideal for comparing optical rotation values to those in literature, allowing students to calculate specific rotation for sucrose, fructose, and other optically active samples. Students no longer have to determine the optical maximum with their eye—they now have a graph that shows a clear change in the light’s polarization. Specifications Light source: LED Wavelength (nominal): 589 nm Accuracy (optical rotation measurements): ±1° Rechargeable Battery—Ready When You AreThe robust rechargeable battery offers long battery life and provides always-ready operation when using the sensor wirelessly. Should the battery run low, simply connect the sensor to the charging cable and keep on collecting—no interruptions or inconvenience to you or your students. Wired or Wireless—The Flexibility to ChooseGo Direct Polarimeter connects directly to your mobile device, Chromebook™, or computer using our free Vernier Instrumental Analysis™  app—no additional equipment or software purchases are necessary. Go Direct sensors connect via USB or wirelessly via Bluetooth® wireless technology, allowing you to choose the best solution for your laboratory. 

La Stir Station est une combinaison d'agitateur magnétique et d'un support annulaire. Le poste d'agitation manipule efficacement des béchers et d'autres contenants aussi petits que 50 mL et aussi grands qu'un litre (capacité pratique de 800 mL). Il fonctionne efficacement avec des béchers dotés d'un large éventail de tailles et de formes de barres d'agitation magnétiques. Utilise un contrôle de vitesse en boucle fermée, ce qui facilite l'ajustement de sa vitesse d'agitation (50–1250 tr/min).La plate-forme d'agitation est éclairée par trois DEL blanches fraîches. Les DEL sont placées sous la plate-forme d'agitation pour fournir un excellent éclairage d'un récipient en verre contenant du liquide.Comprend un poteau annulaire amovible de 18" idéalement positionné et fixé à la base de l'agitateur, à une distance qui s'accommode facilement de la plupart des pinces buret ou utilitaires.Fonctionne avec alimentation CA (adaptateur inclus) ou quatre piles C (non incluses).Suffisamment robuste pour faire fonctionner la plupart des barres magnétiques de taille courante ou un Microstirrer Vernier.Possède une plaque d'agitation en plastique résistant aux produits chimiques. Comprend: Station de remorquage de Vernier Vernier Microstirrer Barre d'agitation (4 cm) Adaptateur de courant continu 6 volts Poteau annulaire (46 cm) Manuel d'utilisation

La sonde de température Go Direct est un capteur de température robuste et polyvalent que les élèves peuvent utiliser pour surveiller la température. Elle se connecte directement à votre plate-forme, sans fil via Bluetooth® ou par câble via USB. La sonde de température Go Direct, robuste et polyvalente, offre aux étudiants l'avantage d'une connectivité qui leur permet d'aller partout et de travailler partout. Comme elle est également étanche, Go Direct Temperature est plus durable que les sondes qui sont simplement résistantes à l'eau. Contrairement à un thermomètre traditionnel, Go Direct Temperature permet aux étudiants de collecter des mesures de température en temps réel pour une seule personne ou sur une période donnée. Sa plage de température et sa capacité sans fil font de Go Direct Temperature le capteur idéal pour les applications du monde réel. La sonde de température Go Direct peut être utilisée dans une grande variété d'expériences : Réaliser des réactions endothermiques et exothermiques. Étudier la congélation et la fonte de l'eau. Mesurer le contenu énergétique des aliments. Examiner l'absorption de l'énergie radiante. Contrôler les conditions environnementales. Spécifications : Plage de température : -40 à 125°C Plage de température de la poignée : -10 à 45°C Précision : ±0,25°C Temps de réponse (temps pour 90% de la lecture) : 20 secondes (dans l'eau, avec agitation) Connexions : Sans fil : Bluetooth Avec fil : USB Inclus : Go Direct Capteur de température Câble micro USB Guide de démarrage rapide

The Go Direct Gas Pressure Sensor measures the absolute pressure of a gas. It directly connects wirelessly via Bluetooth® or wired via USB to your platform. Use Go Direct Gas Pressure Sensor to monitor gas pressure in a variety of experiments. It records accurate absolute pressure readings relative to the perfect vacuum reference point inside the sensor, allowing you to go below atmospheric pressure or up to 400 kPa. Easily change the displayed units to any one of seven options (kPa, mmHg, inHg, mbar, psi, atm, torr). Includes a syringe, tubing, and stoppers to ease setup for experiments such as Boyle’s law. The Go Direct Gas Pressure Sensor can be used in a variety of experiments: Investigate Boyle’s law and Charles’ law. Investigate grip strength and muscle fatigue (using Gas Pressure Bulb, not included). Measure the production of oxygen gas produced when hydrogen peroxide is destroyed by the enzyme catalase. Monitor plant transpiration. Specifications: Range: 0 to 400 kPa Resolution: 0.03 kPa Maximum pressure that the sensor can tolerate without permanent damage: 450 kPa Connections: Wireless: Bluetooth Wired: USB Included: Vernier Go Direct Gas Pressure Sensor Tapered valve connectors (2) inserted into a No. 5 stopper Tapered valve connector (1) inserted into a No. 1 stopper Two-way valve 18 inch Tygon tubing with Luer Lock connectors 20 mL syringe White transpiration tubing clamps (2)

The Go Direct pH Sensor is a general-purpose pH sensor used to monitor pH of aqueous solutions. It directly connects wirelessly via Bluetooth® or wired via USB to your platform. The Go Direct pH Sensor is an important and versatile sensor for lab and field activities alike. It gives students the freedom to explore pH without the inconvenience of wires—no more spilled solutions or dangling wires. The Go Direct pH transmits live readings and captures data in real-time. The Go Direct pH Sensor can be used in a variety of experiments: Conduct acid-base titrations. Monitor pH change during chemical reactions. Test the pH and alkalinity of bodies of water. Investigate household acids and bases. This sensor is comprised of a pH electrode connected to a Go Direct Electrode Amplifier via a BNC connector. This design enables you to use the Go Direct Electrode Amplifier with other Vernier electrodes, such as the Flat pH Electrode, ORP Electrode, ISE electrode, or a third-party electrode. Specification: pH range: 0–14 Type: Sealed, gel-filled, epoxy body, Ag/AgCl reference Shaft diameter: 12 mm OD Storage solution: pH-4/KCl solution (10 g KCl in 100 mL buffer pH-4 solution) Connections: Wireless: Bluetooth Wired: USB Included: Go Direct pH (includes Go Direct Electrode Amplifier) Micro USB Cable Quick-start guide 

Go Direct Ethanol Vapor measures the concentration of ethanol in the air above an aqueous sample. This sensor can be used in a wide variety of experiments in biological, agricultural, food, and environmental studies. Go Direct Ethanol Vapor can be used in a variety of experiments: Determine the rate of ethanol production during fermentation. Measure the discrete amount of ethanol in a given sample. Investigate which sugars yeast can ferment. Identify specific organisms that can utilize ethanol fermentation as a metabolic pathway. Rechargeable Battery—Ready When You AreThe robust rechargeable battery offers long battery life and provides always-ready operation when using the sensor wirelessly. Monitor battery life directly from our free Graphical Analysis™ 4 app or LabQuest 2 App. Should the battery run low, simply connect the sensor to the charging cable and keep on collecting—no interruptions or inconvenience to you or your students. Wired or Wireless—The Flexibility to ChooseOur Go Direct sensors connect directly to your mobile device, Chromebook™, or computer using our free Graphical Analysis™ 4 app—no additional equipment or software purchases are necessary. Go Direct sensors can be used wired via USB or wirelessly via Bluetooth® wireless technology, allowing you to choose the solution best for your classroom or laboratory.