Abstract: Biodegradable poly(ester-amides) are synthesized from amino acids, diols and dicarboxylic acids where one or both of the diols and dicarboxylic acids contain unsaturation; e.g., from di-p-nitrophenyl dicarboxylates and p-toluenesulfonic acid salts of bis(alpha-amino acid) disesters of diols where one or both of the dicarboxylate and diol moieties contain unsaturation or from di-p-nitrophenyl dicarboxylates, and p-toluene-sulfonic acid salts of bis(alpha-amino acid) diesters of diols and p-toluenesulfonic acid salt of lysine ester where one or both of the dicarboxylate and diol moieties contain unsaturation. The polymers are useful as biodegradable carriers for drugs of other bioactive agents.

Abstract: An electrical connector (100) comprises an insulative housing (1), a plurality of contacts (2) assembled to the insulative housing (1), and a shell (3) having at least a spring piece (31) with at least a protrusion projected outward. With the set of the protrusion, the electrical connection between the electrical connector (100) and a chassis panel may be improved and reliable.

Abstract: A preparation method of silica, especially superfine silica, with water glass and carbon dioxide as major raw materials in a carbonization reaction conducted under a high gravity field, typically in a Higee reactor.

Abstract: An electrical connector (1) includes a dielectric housing (10), a plurality of terminals (12) received in the housing, and a retention mechanism (2) attached to the housing. The housing forms a pair of first mating members (103) at opposite ends thereof. Each terminal has a bending portion (124). The retention mechanism has an elongate stopper body (20). The stopper body has cantilevers (22) at opposite sides thereof. The cantilevers each define a second mating member (220) respectively mating with a corresponding first mating member, so that the stopper body presses on the bending portions of the terminals. Thus the terminals are firmly retained in the housing. In addition, the cantilevers are easily rotated outwardly so that the retention mechanism is assembled on and disassembled from the housing conveniently and safely.

Abstract: An electrical connector (1) includes a dielectric housing (10), a plurality of terminals (13) received in the housing, and a retention mechanism (12) pivotally attached to the housing. The housing defines a plurality of terminal-passages (108) and first mating members (103). Each of terminals includes a bent portion (134). The retention mechanism has an elongate stopper member (120). A pair of cantilevers (122) depends from the stopper member. A second mating member (1222) is formed on each of the cantilevers, for engaging one of the first mating members. Thus the stopper member is rotatable between a first position in which the stopper is protected from thermal warp or deformation, and a second position in which the terminals are secured in the corresponding terminal-passages.

Abstract: A preparation method of silica, especially superfine silica, with water glass and carbon dioxide as major raw materials in a carbonization reaction conducted under a high gravity field, typically in a Higee reactor.