Haake

An early application of the free energy perturbation method was the determination of t] tree energy required to create a cavity in a solvent. Postma, Berendsen and Haak determin the free energy to create a cavity (A = 1) in pure water (A = 0) using isothermal-isobai... 

Postma J P M, H J C Berendsen and J R Haak 1982. Thermodynamics of Cavity Formation ui Wat - Faraday Symposium of the Chemical Society 1755-67. 

Berendsen et al. [H. I. C. Berendsen, I. P. M. Postma, W. F. van Gun-steren, A. di Nola, and I. R. Haak, J. Chem. Phys. 81, 3684 (1984)] have described a simple scheme for constant temperature simulations that is implemented in HyperChem. You can use this constant temperature scheme by checking the constant temperature check box and specifying a bath relaxation constant t. This relaxation constant must be equal to or bigger than the dynamics step size D/. If it is equal to the step size, the temperature will be kept as close to constant as possible. This occurs, essentially, by rescaling the velocities used to update positions to correspond exactly to the specified initial temperature. For larger values of the relaxation constant, the temperature is kept approximately constant by superimposing a first-order relaxation process on the simulation. That is ... 

Grades and Specifications. Two grades of phloroglucinol, ie, grades 2 and pure, are offered in the United States by Haake, Inc., who resell material made by Fisons (Table 1). The product discolors slowly on exposure to light. 

Rheosyst Haake C 1-W9 Haake GmbH, Kadsmhe, Germany Paramus, N.J. 

Haake has introduced other viscometers, including the RheoStress RSlOO, which offers controlled stress as well as controlled shear rate and oscillatory modes over a temperature range of —50 to 350°C (ambient to 500°C is also possible). This versatile viscometer covers a shear rate range of 10 ... 

N. M. van Os, J. R. Haak, and L. A. M. Rupert, eds., Physico-Chemical Properties of Selected yinionic, Cationic, andNonionic Sufactants, Elsevier, Amsterdam, the Netherlands, 1993. 

Chocolate does not behave as a tme Hquid owing to the presence of cocoa particles and the viscosity control of chocolate is quite compHcated. This non-Newtonian behavior has been described (28). When the square root of the rate of shear is plotted against the square root of shear stress for chocolate, a straight line is produced. With this Casson relationship method (29) two values are obtained, Casson viscosity and Casson yield value, which describe the flow of chocolate. The chocolate industry was slow in adopting the Casson relationship but this method now prevails over the simpler MacMichael viscometer. Instmments such as the Carri-Med Rheometer and the Brookfield and Haake Viscometers are now replacing the MacMichael. 

F. Theeuwes, S. I. Yum, R. Haak, andP. Wong, Temporal Control of DrugDeliverg YoX. Annals of The New York Academj of Sciences TCY.AS. ... 

Vilsraeier-Haak formylation of 5-amino-3-phenylisoxazole (86) gave the aldehyde (87), which is a useful intermediate for the synthesis of isoxazolopyridines and isoxazolopyrimidines (77H(7)5l). 

JP Postma, HC Berendsen, JR Haak. Faraday Symp Chem Soc 17 55, 1982. 

HJC Berendsen, JPM Postma, WF van Gunsteren, A DiNola, J Haak. J Chem Phys 81 3684-3690, 1984. 

Zauner and Jones (2000a) describe an experimental set-up for determination of precipitation kinetics, as shown in Figure 6.19. Briefly, the jacket glass reactor (1) (300 ml, d = 65 mm) is equipped with a polyethylene draft tube and four baffles. The contents are stirred using a three-blade marine-type propeller (5) with motor (Haake), which pumps the suspension upwards in the annulus and downwards inside the draft tube. Measured power inputs ranged from 3.3 X 10- to 1.686 W/kg. 

---