Paprotzkius enucleatus oder Kern und Auszug aus dem Mährischen Geschicht-Spiegel Bartholomaei Paprotzkii ... Von Christoph Pfeiffer.

[Auszug].

Operator, organizational, direct support, general support, and depot maintenance manual : theodolite, directional, 2/10 sec graduation, first-order, with accessories, trivet, tripod, and cases (Kern model DKM3M) FSN 6675-455-9200.

Includes index.

Die obstverwertung. Gründliche unterweisung in der behandlung, aufbewahrung und benutzung von kern- und steinobst ... Nebst ratschlägen zur organisation und hebung des deutschen obsthandels.

Mode of access: Internet.

Experimentelle Untersuchung der Massenverhältnisse von Plasma, Kern und Chromosomen in dem sich entwickelnden Seeigelei /

Thesis (doctoral)--Ludwig-Maximilians Universität München, 1908.

Idioticon Austriacum, das ist: Mundart der Oesterreicher, oder Kern ächt österreichischer Phrasen und Redensarten, von A bis Z.

Mode of access: Internet.

Apollonius Cattus, oder, Kern der gantzen Geometriæ in drey Theil/

Frontispiece includes a portrait of Jost Bürgi, whose triangular instrument is described in Th. 3.

Systematisch-geordnetes Handbuch der Pomologie, mit Inbegriff der in der Königl. bayerischen Central-Obstbaumschule zu Weyhenstephan bei Freising Aufgestellten und Cultivirten, Kern- und Steinobstsorten, und besonderer Berücksichtigung sowohl des Bodens und Klima's, als der Anwendung und Nutzbarkeit; nebst einer Einleitung über Behandlung und Pflege der Obstbäume.

1. Bd. Aepfel.--2. Bd. Birnen.--3. Bd. Steinobst. Mit einem Anhange, die Quitten, Mispeln, Cornelkirschen und das sämmtliche Schalenund beerenobst behandelnd.

Scale-up in emulsion polymerisation

The procedure for successful scale-up of batchwise emulsion polymerisation has been studied. The relevant literature on liquid-liquid dispersion on scale-up and on emulsion polymerisation has been crit1cally reviewed. Batchwise emulsion polymerisation of styrene in a specially built 3 litre, unbaffled, reactor confirmed that impeller speed had a direct effect on the latex particle size and on the reaction rate. This was noted to be more significant at low soap concentrations and the phenomenon was related to the depletion of micelle forming soap by soap adsorption onto the monomer emulsion surface. The scale-up procedure necessary to maintain constant monomer emulsion surface area in an unbaffled batch reactor was therefore investigated. Three geometrically similar 'vessels of 152, 229 and 305mm internal diameter, and a range of impeller speeds (190 to 960 r.p.m.) were employed. The droplet sizes were measured either through photomicroscopy or via a Coulter Counter. The power input to the impeller was also measured. A scale-up procedure was proposed based on the governing relationship between droplet diameter, impeller speed and impeller diameter. The relationships between impeller speed soap concentration, latex particle size and reaction rate were investigated in a series of polymerisations employing an amended commercial recipe for polystyrene. The particle size was determined via a light transmission technique. Two computer models, based on the Smith and Ewart approach but taking into account the adsorption/desorption of soap at the monomer surface, were successful 1n predicting the particle size and the progress of the reaction up to the end of stage II, i.e. to the end of the period of constant reaction rate.

Atom transfer radical polymerisation - towards the synthesis of a fully-functional photorefractive polymer

Atom transfer radical polymerisation (ATRP) of styrene in xylene solution initiated with 1-phenylethyl bromide and mediated by CuBr/N-propyl-2- pyridinemethanimine catalyst complex was studied. The polymerisation was ill-controlled, yielding polymers with broad molecular weight distributions and values of number average molecular weight considerably higher than the theoretical values calculated from 100% initiator efficiency. The degree of control afforded over the polymerisation was enhanced by use of a more soluble catalyst complex, CuBr/N-octyl-2-pyridinemethanimine. Furthermore, the use of a more polar solvent, diglyme, generated a homogeneous catalyst complex that facilitated the production of polymers having narrow molecular weight distributions (1.10 < PDi < 1.20). The kinetics of the atom transfer radical polymerisation of methyl methacrylate at 90°C in diglyme solution initiated with ethyl-2-bromoisobutyrate and mediated by CuBr/N-octyl-2-pyridinemethanimine was studied and the orders of the reaction were established. The effect on the rate of polymerisation of the ratio of CuBr:N-octyl-2-pyridinemethanimine was also determined. The temperature dependencies of the rate of polymerisation of methyl methacrylate in diglyme solution and xylene solution were studied, and were found to be non-linear and dependent upon the polarity of the solvent. The use of highly polar aprotic solvents, such as N,N-dimethylformamide and dimethylsulphoxide, was found to be detrimental to the degree of control afforded over the polymerisation of methyl methacrylate. This was circumvented by use of a 5-fold excess, over that conventionally used, of catalyst complex. The atom transfer radical polymerisation of (4-nitrophenyl)-[3-[N-[2- (methacryloyloxy)ethyl]carbazolyl]]diazene in dimethyl sulphoxide solution was studied. Although homopolymerisation yielded only oligomers, copolymerisation of this monomer with methyl methacrylate was found to be readily achievable. Keywords: ATRP, Styrene; Methyl methacrylate; Polar solvents; Fully-functional photorefractive polymer. 2