Process of treating cellulosic membrane and alkaline with membrane separator

The improvement of water-soluble cellulose ether membranes for use as separators in concentrated alkaline battery cells is discussed. The process of contacting membranes with an aqueous alkali solution of concentration less than that of the alkali solution to be used in the battery but above that at which the membrane is soluble is described

Alkaline electrochemical cells and method of making

Equilibrated cellulose ether membranes of increased electrolytic conductivity for use as separators in concentrated alkaline electrochemical cells are investigated. The method of making such membranes by equilibration to the degree desired in an aqueous alkali solution mantained at a temperature below about 10 C is described

Separator for alkaline batteries

Separator compositions have been tested as components of three-plate silver-zinc oxide cells in a standard cycling test. Six materials meet imposed requirements, giving cycling performance superior to cellophane

Separator for alkaline electric batteries and method of making

Battery separator membranes of high electrolytic conductivity comprising a cellulose ether and a compatible metallic salt of water soluble aliphatic acids and their hydroxy derivatives are described. It was found that methyl cellulose can be modified by another class of materials, nonpolymeric in nature, to form battery separator membranes of low electrolytic resistance but which have the flexibility of membranes made of unmodified methyl cellulose, and which in many cases enhance flexibility over membranes made with unmodified methyl cellulose. Separator membranes for electrochemical cells comprising a cellulose ether and a modified selected from the group consisting of metallic salts of water soluble alphatic acids and their hydroxy derivatives and to electrochemical cells utilizing said membranes are described

Aqueous alkali metal hydroxide insoluble cellulose ether membrane

A membrane that is insoluble in an aqueous alkali metal hydroxide medium is described. The membrane is a resin which is a water-soluble C2-C4 hydroxyalkyl cellulose ether polymer and an insolubilizing agent for controlled water sorption, a dialytic and electrodialytic membrane. It is particularly useful as a separator between electrodes or plates in an alkaline storage battery

Decentralized Tax and Public Service Policies with Differential Mobility of Residents

A central focus of an extensive literature on fiscal competition has been on how the decentralization of tax and service policy affects efficiency, generally whether public services are inefficiently under- or overprovided. This question has traditionally been addressed in a framework in which the tax base regions compete for mobile capital. Here I am also interested in the impact of fiscal decentralization on both public service provision and tax policy but in a framework with both labor and capital mobility. Rather than limiting the competing regions to taxing only capital or only labor, I consider the endogenous choice of the two tax instruments in the context of two related models. In the first model, while labor is mobile it is also homogeneous. In this model I show that regions will choose to only tax income and not capital when public service costs are proportionate to the population and, by doing so, will provide the efficient level of public services. However, if there are public service costs not proportionate to the population, “fixed costs,” if given the option, regions will tax or subsidize capital as well as tax income. As a result of capital taxation, the public service is underprovided. I extend the model along the lines of Wildasin (AER, 2000) to consider two groups of workers who differ in both mobility and, in my case, human capital (skill). Unlike Wildasin, the difference in income is exogenous and not the result of investment decisions. In this model, I first consider the policies chosen by these regions when they can only tax income. I find that the public service can be either over or underprovided, depending on the relative impact of changes in public services and taxes on the mobility of the two groups. Next, I consider whether, in the absence of fixed costs, regions will want to tax or subsidize capital and find that in general they will with the magnitude and sign of a tax (subsidy) on capital depending on how capital taxation affects the relative mobility of the two groups of workers.

Separator for alkaline electric cells and method of making

Modified cellulose ether films having an increased electrolytic conductivity and a useable flexibility and in certain instances an increased flexibility are presented. Battery separator membranes comprising a cellulose ether and a minor proportion of a compatible water soluble base selected from the group consisting of alkali metal and ammonium hydroxides, aliphatic amines, and aliphatic hydroxyamines are used

Separator for alkaline batteries and method of making same

The preparation of membranes suitable for use as separators in concentrated alkaline battery cells by selective solvolysis of copolymers of methacrylate esters with acrylate esters followed by addition of a base and to the resultant products is described. The method of making copolymers by first copolymerizing a methacrylate ester (or esters) with a more readily hydrolyzable ester, followed by a selective saponification whereby the methacrylate ester moieties remain essentially intact and the readily hydrolyzable ester moiety is suponified and to the partial or complete neutralization of the relatively brittle copolymer acid with a base to make membranes which are sufficiently flexible in the dry state so that they may be wrapped around electrodes without damage by handling is described

Improved separators for silver oxide-zinc and silver oxide-cadmium cells for spacecraft application Second quarterly progress report, 10 Feb. - 9 May 1965

Separators for silver oxide-zinc and silver oxide- cadmium cells for spacecraft applicatio

An Alternative Derivation of the Nimbus 7 Total Solar Irradiance Variations

Nimbus 7 solar irradiance values have been made available to the scientific community through the open literature (e.g., Hickey et al., 1988) and through NASA data centers. A comparison of these measurements to the Solar Maximum Mission/Active Cavity Radiometer Irradiance Monitor (SSM/ACRIM) time series indicated differences which might be caused in part by the method of converting the Nimbus 7 raw data counts to solar irradiance values. In an effort to see if the derivation of the solar irradiance could be improved, the raw counts were extracted from the tapes and analyzed to see how a new algorithm could be constructed. The basic form of the calibration remains the same as in the previous solar irradiance derivations. However, the input values to the equation differ from what was used before. In particular, improved values of the Earth-sun distance are incorporated and new temperature sensitivities were derived. Several problems with the instrument were uncovered which previously had not been noticed. The sun did not appear to cross the center of field of the radiometer but was systematically off by 1.5 to 2.5 degrees. The analog to digital convertor changed its properties in July 1980. The gain of the electronics apparently increased by 0.03 percent in September 1987. Applying these and other changes in the processing, the day to day variations appear much more like the SMM observations. In fact, the Nimbus 7 observations are sufficiently stable that a problem with the SSM observations in the spin mode period of 1981 to 1984 can be detected when the two time series are compared