Food Chemistry Experiments - Print and E-Book

Lo spettrofotometro Go Direct SpectroVis Plus misura rapidamente l'intera lunghezza d'onda. Si collega direttamente alla piattaforma in modalità wireless tramite Bluetooth® o cablato via USB. Introducete i vostri studenti alla spettroscopia con l'economico spettrofotometro Go Direct SpectroVis Plus. In grado di collegarsi wireless o via USB, questo dispositivo può facilmente raccogliere l'intera lunghezza d'onda (assorbanza, trasmissione percentuale o intensità) in meno di un secondo. Una volta determinata la lunghezza d'onda di picco, è possibile stabilire la concentrazione di una soluzione (legge di Beer) o monitorare la velocità di reazione. Un percorso luminoso ridotto consente allo spettrofotometro Go Direct SpectroVis Plus di essere utilizzato per microlaboratori e applicazioni biochimiche con micro e semi-micro cuvette. Lo spettrofotometro Go Direct SpectroVis Plus può essere utilizzato in diversi esperimenti di spettroscopia: Determinare la lunghezza d'onda del picco per raccogliere dati sulla concentrazione della soluzione per studi sulla legge di Beer o per monitorare le velocità di reazione. Raccogliere uno spettro a lunghezza d'onda completa per misurare l'assorbanza, la trasmittanza percentuale, la fluorescenza (a 405 nm o 500 nm di eccitazione) o le emissioni. Condurre esperimenti di cinetica enzimatica. Effettuare studi sull'equilibrio di assorbanza vs tempo o assorbanza vs concentrazione. Effettuare biotest colorimetrici o fluorescenti. Utilizzate lo spettrofotometro a fibra ottica (VSP-FIBER) per misurare le emissioni provenienti da prove alla fiamma o da altre sorgenti luminose. Per un'analisi più dettagliata delle emissioni, prendete in considerazione lo spettrometro Vernier Emissions (VSP-EM). Spettroscopia con Go Direct SpectroVis Plus Per utilizzare lo spettrofotometro Go Direct SpectroVis Plus, scarica l'app gratuita Spectral Analysis. L'app è compatibile con computer, Chromebook e dispositivi mobili. Gli studenti possono anche collegarsi a LabQuest 2 o a un computer con Logger Pro per effettuare analisi. Specifiche Intervallo di lunghezze d'onda: 380 nm–950 nm Supporto per fluorescenza: due sorgenti di eccitazione centrate a 405 nm e 500 nm Intervallo di lunghezza d'onda riportato: ~1 nm tra i valori riportati (raccoglie 570 valori) Dimensioni: 16 cm x 10 cm x 5 cm Sorgenti luminose: Lampadina bianca a incandescenza, durata di circa 8.000 ore, calibrazione in un solo passaggio. Basato su LED, durata di circa 100.000 ore. Nessuna alimentazione esterna è richiesta.

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 è un agitatore magnetico combinato con un supporto ad anello. La stazione di mescolamento gestisce in modo efficiente becher e altri contenitori da 50 mL e da un litro (800 mL di capacità pratica). Funziona in modo efficiente con becher con un'ampia gamma di dimensioni e forme di barre di mescolamento magnetico. Utilizza un controllo della velocità ad anello chiuso, facilitando così la regolazione della velocità di agitazione (50-1250 RPM).La piattaforma di agitazione è illuminata da tre LED bianchi freddi. I LED sono posizionati sotto la piattaforma di agitazione per fornire un'ottima illuminazione di un contenitore di vetro di liquido.Include un supporto ad anello da 18 pollici rimovibile comodamente posizionato e fissato alla base dell'agitatore, ad una distanza tale da ospitare facilmente la maggior parte dei morsetti di servizio.Funziona con alimentazione AC (adattatore incluso) o con quattro batterie C (non incluse).È sufficientemente robusto per azionare la maggior parte delle barre di agitazione magnetiche di dimensioni comuni o un Microstirrer Vernier.Ha una piastra di mescolamento in plastica resistente alle sostanze chimiche. Inclusi: Stazione di Vernier Stir Microagitatore Vernier Barra di agitazione (4 cm) Adattatore di alimentazione DC da 6 volt Supporto ad anello (46 cm) Manuale dell' utente

La sonda di temperatura Go Direct è un robusto sensore di temperatura per uso generale che gli studenti possono utilizzare per monitorare la temperatura. Si collega direttamente alla piattaforma in modalità wireless tramite Bluetooth® o via cavo tramite USB. La sonda di temperatura Go Direct, robusta e multiuso, offre agli studenti il vantaggio della connettività ovunque e ovunque si lavori. Essendo anche impermeabile, Go Direct Temperature è più durevole dei sensori che sono semplicemente resistenti all'acqua. A differenza di un termometro tradizionale, Go Direct Temperature consente agli studenti di raccogliere misure di temperatura in tempo reale di un singolo caso o di un periodo di tempo. L'intervallo di temperatura e la funzionalità wireless rendono Go Direct Temperature il sensore ideale per le applicazioni reali. La sonda Go Direct Temperature può essere utilizzata in una varietà di esperimenti: Condurre reazioni endotermiche ed esotermiche. Studiare il congelamento e la fusione dell'acqua. Misurare il contenuto energetico degli alimenti. Esaminare l'assorbimento dell'energia radiante. Monitorare le condizioni ambientali. Specifiche tecniche: Intervallo di temperatura: da -40 a 125°C Intervallo di temperatura di manipolazione: da -10 a 45°C Precisione: ±0,25°C Tempo di risposta (tempo per il 90% della lettura): 20 secondi (in acqua, con agitazione) Connessioni: Senza fili: Bluetooth Con cavo: USB Incluso: Sensore di temperatura Go Direct Cavo micro USB Guida rapida

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.