58
Modern Kjeldahl Analysis
Velp Scientifica provides scientists with a complete system to perform Kjeldahl analysis for nitrogen/protein determination (TKN). The DKL Digesters maximise automation, including automatic lift and vacuum control. A large program library, including the most commonly used international methodologies already installed, simplifies operation and saves time. Run data can be stored via a USB connection for optimised transfer on top models. A range of models is available to suit the required sample capacity.
The UDK Distillation Units provide different choice of automation level all ensuring simplicity of operation and full protection of the sample and operator. High technology level inside such as the Velp patented steam generator (it operates without pressure), the titanium condenser (patent pending) whit extremely reduced water consumption and the technopolymer splash head that ensures that all nitrogen is analysed for the highest possible accuracy of results. UDK 159 & UDK 169, the top of the range, incorporate a colorimetric titrator (AOAC recommended).
Velp offers also a complete set of consumables such as Catalysts Tablets (KjTabsTM acid powder formula with indicators for colorimetric titration (VreceverTM
system ensure compatibility to AOAC, EPA, DIN and ISO standards.
31629pr@reply-direct.com
) and boric ). Velp Kjeldahl
Next Generation Analytical Ultracentrifuge Unveiled
Beckman Coulter Life Sciences has introduced the Optima AUC, a next generation analytical ultracentrifuge with many enhanced capabilities creating a fast, sophisticated and easy-to use analytical research tool. The optics are contained outside the rotor chamber, making it easier to clean, and reducing the impact of the g-force on the optics.
The 38.1 cm (15 inch diagonal), touch-screen display eases operation and boosts efficiency. In addition, modern, intuitive software enables simple run- monitoring and data exports performed either locally or remotely
Product Manager Chad Schwartz PhD explained: “The new Optima AUC returns analytical ultracentrifugation to the forefront of solution-state protein and particle analysis for accurate molecular weight determination, thermodynamics of associating systems, viral and nanoparticle payload characterisation, and many additional emerging applications.”
Although analytical ultracentrifugation is a recognised technique for protein characterisation, researchers have realised the technology’s value for characterising a wide array of particles including peptides, polymers, metallic nanoparticles, liposomes and other non-biological materials. The Optima AUC allows molecules to float free and unbound so that researchers are able to characterise them in their native state.
This powerful technology determines molecular weight, size, shape, and polydispersity, and is capable of interactions between particles in a native, matrix-free environment. The new Optima AUC now allows multi-wavelength analysis.
“Rapid data acquisition coupled with reproducible and precise wavelength selections enable applications never before possible with AUC,” said Dr Schwartz. Wavelength-specific monitoring now allows researchers to study complex systems easily and in a single experiment.”
Dr Borries Demeler, University Texas Health Science Center, USA, singled out the following key technical innovations: new Rayleigh interference system for higher resolution for more precise measurements, higher data density and higher confidence in the results; state of the art UV-visible absorption optics to provide reproducible wavelength selections, fast radial scanning for reduced temporal distortion, and sensitive detection in the far UV.
Commenting on their importance, he stressed: “For the first time, these advanced features enable revolutionary new multi-wavelength experiments, an entirely new class of experimental designs that can exploit the presence of multiple chromophores in complex mixtures through spectral decomposition.
The Optima AUC improves temperature control and increases data storage, wavelength precision, and wavelength repeatability, providing researchers the confidence needed for clean, reproducible data. Additionally, the instrument’s modular design allows for the development of new detection systems, opening up the possibility for unique detection capabilities.
39976pr@reply-direct.com
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132
