surface topography of blank-dyed merino wool

merino wool was blank-dyed in citric acid-phosphate buffer at ph 2. 0, 4. 5, and 8. 0, at the boil, for periods of up to five hours. the treatment dissolved significant quantities of protein material from the wool and altered the fiber cuticle surface scanning electron microscope studies showed that modification of the cuticle cell surfac..

integration of a $left double quote$ thin $right double quote$ and a $left double quote$ thick $right double quote$ film resistor system on 96 alumina results in an optimized combination of two complementary technologies

a conventional silk screen printing process is used to deposit on a same alumina substrate $left double quote$ thin $right double quote$ (400 to 1400 a) and $left double quote$ thick $right double quote$ (100,000 to 200,000 a) resistive films. due to a 135 $degree$ c lower firing temperature of the metallo-organic paste used on the $left ..

observations on the characteristics of australian greasy wool $em dash$ 2. color in merino fleece wools

an analysis is presented of the color characteristics of 1849 merino fleece wools in the greasy and clean states, the wools being classified according to the australian wool corporation's type scheme. it is concluded that a subjective grading of greasy color could satisfactorily replace style appraisal in price analyses and that merino fl..

bedruckbarkeit von aluminiumoberflaechen. $left bracket$ printability of aluminum surfaces $right bracket$

aluminum surfaces can be printed by the offset, screen and flexographic methods, by the indirect gravure process and the silkscreen process. offset printing is used when high precision or small runs are to be produced and when only a light color impression is required. screen printing is preferred if the color coating has to be particular..

prototype circuit component referencing

the method of component referencing for circuit diagrams recommended in bs:3939 gives no indication of component location unless the references are silk-screened onto the circuit board these are unavailable when prototype circuits are built on general purpose matrix boards, using dil sockets and wire-wrap or pen-wrap inter-connections. a ..

acid zinc proves competitive

a zinc plating job shop has captured business from competitive nickel-chromium platers after switching from cyanide and alkaline baths to the acid zinc chloride process. the high brightness and good leveling seen on parts plated in the zinc chloride bath approach that of nickel-chromium at considerably less cost and with essentially no en..

twenty-six-inch pipe nde instrument surveillance test

the 26 inch diameter pipe test stand simulates an operating reactor environment and was fabricated for evaluating in-service inspection techniques for large diameter pipes. the pipe specimen has stress corrosion cracking (scc) promoted in the test weld region by means of water chemistry control and the use of graphite wool technique to cr..

acid $en dash$ base and dyeing properties of nigerian merino, yankasa, and merino $en dash$ yankasa crossbred wools

in the reported experiments, the acid $en dash$ base titration curves of three wools, merino, yankasa, and a **5///8 $en dash$ **3///8 merino $en dash$ yankasa crossbred wool, grown in nigeria, were obtained at 25 $degree$ c in the presence of varying amounts of sodium chloride. amino acid analysis was carried out on these wools and corre..

recupero di energia termica nei processi in bagno acquoso dell'industria tessile laniera. $left bracket$ thermal energy recovery from the bath processes in the woolen textile industry $right bracket$

the possibility of recovering the thermal energy contained in the waste waters of the woolen textile industry (dyeing and finish operations) is illustrated. in particular the data regarding two methods applied in two different factories are reported. from these data it is shown that this thermal energy can be normally recovered by cooling..

tryptophan sensitised fading of acid dyes in polymer films

it has been shown that tryptophan, the strongly absorbing and most photo-active component of wool, sensitizes the fading of acid dyes in poly(vinyl alcohol) and methyl cellulose films. the effect is more pronounced in the pva which is impervious to oxygen. the triplet state of tryptophan is involved, most probably by the formation of an e..