Pure NMR vs Interactive Physics Simulator

Pure NMIdentify NMR impurities instantly with Pure NMR. Pure NMR is the essential reference tool for chemists working with NMR spectroscopy. Quickly identify unknown peaks in your ¹H and ¹³C spectra by searching a comprehensive database of common laboratory impurities and residual solvents. FAST & ACCURATE SEARCHES Enter a chemical shift value and instantly find all matching impurities within your specified tolerance range. Search across multiple deuterated solvents including CDCl₃, DMSO-d₆, CD₃CN, D₂O, and more. COMPREHENSIVE DATABASE Access chemical shift data for over 60 common impurities including: Residual solvents (water, acetone, ethyl acetate, etc.) Common reagents (triethylamine, acetic acid, TMS, etc.) Laboratory contaminants (silicone grease, pump oil, etc.) Stabilizers and additives (BHT, BHA, etc.) All data is based on peer-reviewed literature (Fulmer et al., Organometallics 2010; Gottlieb et al., J. Org. Chem. 1997). KEY FEATURES - Search by chemical shift (1-H or 13-C) - Adjustable tolerance range (0.0 to +/-1.0 ppm) - Support for 14 deuterated solvents - View complete assignment information (multiplicity, coupling constants) - Add your own custom impurities to the database - Browse all impurities by solvent - Dark mode support - Customizable interface colors - No internet connection required - fully offline PERFECT FOR Organic chemists characterizing compounds Graduate students learning NMR spectroscopy Research scientists in academia and industry Anyone who needs quick impurity identification SCIENTIFICALLY VALIDATED All chemical shift values are sourced from authoritative scientific publications, ensuring accuracy and reliability for your research. EASY TO USE Select your nucleus (1-H or 13-C) Choose your deuterated solvent Enter the unknown chemical shift Get instant results with full spectroscopic details Stop flipping through reference books or searching online databases. Pure NMR puts all the essential impurity data right at your fingertips. PRIVACY FOCUSED Pure NMR works completely offline. No data collection, no tracking, no internet required. Your searches stay on your device.You can also custom save the Default conditions so that every time the App starts up, you are ready to go without having to select them again.

Physics Simulator transforms your iPad and iPhone into an interactive physics laboratory with 38 modules and over 100 real-time simulations. WHAT'S NEW IN VERSION 3.3 • New Animations: Radiation Therapy, Laser Physics, Biophysics (Ion Flow) • Enhanced visualizations: Relativity Time Dilation, Ultrasound Charts • Added support for 2 new languages: Russian and Portuguese (Total 12) • Performance optimization: ~15% faster rendering • 100+ interactive simulations in 38 physics modules COMPREHENSIVE PHYSICS COVERAGE Classical Physics: Explore mechanics with projectile motion, pendulums, and spring oscillators. Study thermodynamics, wave phenomena, and oscillations with interactive visualizations. Electromagnetism & Optics: Visualize electric fields, capacitors, and circuits. Experiment with lenses, telescopes, and diffraction patterns. Modern Physics: Discover the Bohr atomic model, quantum tunneling, and radioactive decay. View 3D hydrogen orbital animations and explore electron orbital shapes (s, p, d). Quantum Mechanics: Visualize electron orbitals in 3D with color-coded wave function phases. Choose between s, p, and d orbitals with all subtypes (px, py, pz, dz², dxz, dyz, dx²-y², dxy). Medical Physics: Professional-grade simulations for MRI (Bloch equations, T1/T2 relaxation, k-space), CT (Radon transform, filtered backprojection), ultrasound with Doppler imaging, Radiation Therapy (Dose Distribution), and nuclear medicine (SPECT, PET). Emerging Fields: Biophysics, Plasma Physics, Geophysics, Particle Physics, Laser Physics, Nanotechnology, Superconductivity, Cosmology, and Gravitational Waves. Advanced Topics: Relativity, chaos theory with Lorenz attractors, celestial mechanics with eclipse simulations, fluid dynamics, acoustics, and astrophysics including gravitational lensing. KEY FEATURES • 100+ interactive simulations with real-time parameter control • Adjustable sliders with immediate visual feedback • Formulas and numerical results displayed alongside animations • Quiz mode to test your understanding • Universal app optimized for iPhone and iPad • Support for 12 languages (English, German, French, Spanish, Italian, Chinese, Japanese, Korean, Hindi, Indonesian, Portuguese, Russian) PERFECT FOR • University physics courses • Medical physics education • High school physics classes • Self-study and exam preparation • Teaching demonstrations All simulations are designed for educational purposes and provide clear, scientifically accurate visualizations of physical phenomena.