Simultaneous realization of superior mechanical and antifouling properties is critical for a coating. The use of stereoscopic polysiloxanes in place of linear polysiloxanes to fabricate antifouling coatings can combine properties of organic and inorganic materials, i.e. , they can exhibit both high hardness and wear resistance from inorganic components as well as the flexibility and tunability from organic components. This strategy is used to prepare hard yet flexible antifouling coatings or polymer-ceramic hybrid antifouling coatings. In this mini-review, we report the recent advances in this field. Particularly, the effects of stereoscopic polysiloxane structures on their mechanical and antifouling properties are discussed in detail.

A c c e p t e d M a n u s c r i p tNeisseria gonorrhoeae (N. gonorrhoeae) is a sexually transmitted pathogen popular worldwide with increased trend of resistance to antimicrobial treatment. We conducted this study to trace the antimicrobial susceptibilities of N. gonorrhoeae to penicillin, spectinomycin, ciprofloxacin, azithromycin, cefixime and ceftriaxone in Guangxi. Totally 303 NG isolates were sampled from patients infected with N. gonorrhoeae from five cities in Guangxi 2013-2015, and the antibiotic susceptibilities were tested by Agar dilution assay. The results showed that N. gonorrhoeae was susceptible to cephalosporins treatment including ceftriaxone (99.7%), cefixime (99%), spectinomycin (100%), and azithromycin (96.4%), and it was the first report of antibiotic susceptibilities for azithromycin surveillance to N. gonorrhoeae in Guangxi. PPNG with percentage rose from 37% in 2013 to 64% in 2015 (P=0.068), and TRNG rate increased from 23% in 2013 to 44% in 2015 (P = 0.071). High resistance of N. gonorrhoeae to penicillin was associated with infection age of 25 to 30 years (P<0.05) and PPNG positive (P<0.01), and TRNG positive was risk factor for ciprofloxacin resistance (P=0.0407). Our study provides creditable evidences for clinical therapeutic strategies and N. gonorrhoeae infection control and prevention in Guangxi, China.

In this report, the optical frequency responses of InGaP/GaAs heterojunction bipolar light-emitting transistors are measured and analyzed using electrical small-signal equivalent circuit models under common-emitter, common-base, and common-collector configurations. Different optical modulation amplitudes and bandwidths, f3 dB, are obtained due to different input impedances and electrical transfer functions. The optical response of light-emitting transistors is able to be “tuned” by different input ports due to unique three-terminal characteristics along with carrier-photon conversion in the base region. From microwave analyses, identical “intrinsic” optical responses can be determined under three configurations at same DC bias condition.