Pre-tanning

The frequency of occupational dermatoses in the leather industry has diminished in Europe due to increased automation. Additionally, a lot of work, such as the pre-tanning process and the first chrome tanning, is now done in developing countries, from which the semi-processed leather is imported. 

Proteolytic enzymes (fleshing, unhairing) Formaldehyde (tanning, pre-tanning)... 

This is a resin-rich system. The stator is wound with pre-formed coils on similar lines as noted above. After thorough testing on each coil for the polarization index and dissipation factor (tan S), as discussed in Sections 9.5 and 9.6, and the impulse voltage withstand test, as discussed in Section 11.4.9, the individual coils are completely cured and toughened before inserting them into the slots. The rest of the process is as noted earlier. 

Ai et.ddeliyde, in pre.sem e of IlC I, pnlyinenses, 1011111114. dclok With /me i liloiide the le.ietion jiies. 1 step fuithei and I mlou.ildehyde is tanned,... 

For the microwave-assisted experiments, both solvents were replaced by 1,2-dichlorobenzene, as it couples very effectively with microwaves (loss-tangent (tan 5) at 20 °C 1,2-dichlorobenzene 0.280 as compared to 0.101 for chlorobenzene). Diels-Alder reactions of 3-methoxy or 3-phenyl pyrazinones with DMAD were performed at a pre-selected maximum temperature of 200 °C, whereas the intramolecular reaction of alkyne tethered pyrazinone required a higher temperature (220 °C). The yields obtained under microwave irradiation are comparable with those obtained under conventional conditions, while for the dihydrofuropyridinone the yield was improved from... 

Tan, M., Chua, K.J., Mujumdar, A.S., and Chou, S.K. 2001. Effect of osmotic pre-treatment and infrared radiation on drying rate and color changes during drying of potato and pineapple. Dry. Technol. 19, 2193-2207. 

Controlling atomic and molecular quantum states with the help of laser light has been an intensively studied field in the last years (see, e.g., [Tan-nor 1985 Judson 1992 Rice 2000 Shapiro 2003]). The ability to produce and shape femtosecond laser pulses [Zewail 1994 Manz 1995] made it possible to create specially tailored wave packets and to manipulate their dynamics in order to reach pre-assigned goals. The techniques of quantum control have been applied to the problem of steering chemical reactions [Tannor 1985 Assion 1998 Shapiro 2003] as well as intramolecular dynamics [Aver-bukh 1993 Goodson 2000],... 

Tan, A., Benetton, S., Henion, J.D., Chip-based solid-phase extraction pre-treatment for direct electrospray mass spectrometry analysis using an array of monolithic columns in a polymeric substrate. Anal. Chem., 75,5504—5511, 2003. 

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