SWOT Analysis of Phalaenopsis amabilis Industry in Zhangzhou City

Phalaenopsis amabilis industry in Zhangzhou City is analyzed by SWOT method,and the strengths,weaknesses,opportunities and threats of P.amabilis industry in the city are expounded.Furthermore,some suggestions for the development of P.amabilis industry in Zhangzhou City are put forward,in order to provide certain references for the development of P.amabilis industry.

Research Progress in Genetics and Molecular Biology of Curcuma L.

There are few studies on the genetic evolution of Curcuma L.,and it is easy to have synonyms or homonyms.In order to make better development and utilization of Curcuma L.,by consulting the relevant literature,the molecular biology and genetics of Curcuma L.were summarized,and discussed in this paper,in order to lay a foundation for the study of phylogeny and genetic evolution of Curcuma L.

A 0.19 ppm/°C bandgap reference circuit with high-PSRR

A high-order curvature-compensated CMOS bandgap reference（BGR） topology with a low temperature coefficient（TC） over a wide temperature range and a high power supply reject ratio（PSRR） is presented.High-order correction is realized by incorporating a nonlinear current INL, which is generated by ？V_（GS） across resistor into current generated by a conventional first-order current-mode BGR circuit. In order to achieve a high PSRR over a broad frequency range, a voltage pre-regulating technique is applied. The circuit was implemented in CSMC 0.5 μm 600 V BCD process. The experimental results indicate that the proposed topology achieves TC of0.19 ppm/°C over the temperature range of 165 °C（-40 to 125 °C）, PSRR of-123 d B @ DC and-56 d B @ 100 k Hz. In addition, it achieves a line regulation performance of 0.017%/V in the supply range of 2.8–20 V.

Interaction of carbonaceous nanomaterials with wastewater biomass

Increasing production and use of carbonaceous nanomaterials （NMs） will increase their release to the sewer system and to municipal wastewater treatment plants. There is little quantitative knowledge on the removal of multi-walled carbon nanotubes （MWCNTs）, graphene oxide （GO）, or few-layer graphene （FLG） from wastewater into the wastewater biomass. As such, we investigated the quantification of GO and MWCNTs by UV-Vis spectrophotometry, and FLG using programmable thermal analysis （PTA）, respectively. We further explored the removal of pristine and oxidized MWCNTs （O- MWCNTs）, GO, and FLG in a biomass suspension. At least 96% of pristine and O-MWCNTs were removed from the water phase through aggregation and 30-min settling in presence or absence of biomass with an initial MWCNT concentration of 25mg.L-1. Only 65% of GO was removed with biomass concentration at or above 1,000 mg. L-1 as total suspended solids （TSS） with the initial GO concentration of 25 mg. L-1. As UV-Vis spectrophotometry does not work well on quantification of FLG, we studied the removal of FLG at a lower biomass concentration （50mg TSS-L-1） using PTA, which showed a 16% removal of FLG with an initial concentration of 1 mg ·L-1. The removal data for GO and FLG were fitted using the Freundlich equation （R2 = 0.55, 0.94, respectively）. The data presented in this study for carbonaceous NM removal from wastewater provides quantitative informa- tion for environmental exposure modeling and life cycle assessment.