Process for making a noble metal on tin oxide catalyst

A quantity of reagent grade tin metal or compound, chloride-free, and high-surface-area silica spheres are placed in deionized water, followed by deaerating the mixture by boiling and adding an oxidizing agent, such as nitric acid. The nitric acid oxidizes the tin to metastannic acid which coats the spheres because the acid is absorbed on the substrate. The metastannic acid becomes tin oxide upon drying and calcining. The tin-oxide coated silica spheres are then placed in water and boiled. A chloride-free precious metal compound in aqueous solution is then added to the mixture containing the spheres, and the precious metal compound is reduced to a precious metal by use of a suitable reducing agent such as formic acid. Very beneficial results were obtained using the precious metal compound tetraammine platinum(II) hydroxide

The Value of Pregnancy Testing Beef Cows

Less than half of cow/calf producers in south-central Oklahoma and north-central Texas utilize pregnancy testing. The objective was to illustrate to beef cattle producers the effect that pregnancy testing and the subsequent adoption of an effective culling practice on first-time open cows has on net profitability of the cow/calf enterprise.Livestock Production/Industries,

Systems comparison of direct and relay link data return modes for advanced planetary missions

Advanced planetary missions using direct and relay link data return mode

Instrumentation for Measurement of Gas Permeability of Polymeric Membranes

A mass spectrometric 'Dynamic Delta' method for the measurement of gas permeability of polymeric membranes has been developed. The method is universally applicable for measurement of the permeability of any gas through polymeric membrane materials. The usual large sample size of more than 100 square centimeters required for other methods is not necessary for this new method which requires a size less than one square centimeter. The new method should fulfill requirements and find applicability for industrial materials such as food packaging, contact lenses and other commercial materials where gas permeability or permselectivity properties are important

Mispronounced Consonants of Basic Listening and Speaking Students of Universitas Klabat

Oral proficiency has been one of the important goals in teaching English as a Foreign Languange (EFL) since it is important not only in communication, but also in other language skills such as reading and writing, which obviously overlay the path to student\u27s academic achievement. A study was conducted to examine mispronounced words by 34 EFL Freshmen FKIP students at the Klabat University who were taking Basic Listening and Speaking Subject. More specifically, this study aimed to find out the mispronounced voiced and voiceless consonants. To analyze the obtained data, a descriptive-quantitative method was used. The study is based on findings derived from a list of selected 397 English words taken from the students\u27 textbook. The words chosen appeared with their minimal pairs.Findings showed that the students could produce voiceless /p/, /k/, and /s/ sounds correctly but mispronounced the other five voiceless sounds: /t/, /k/, /f/, /θ/, /ʃ/, /ʧ/ and voiced consonant sounds: /b/, /d/, /g/, /v/, /ð/, /z/, /ʒ/, /ʤ/. The mispronunciation occurred elsewhere regardless the position of the consonants: initial, middle or final position