The local climate zone (LCZ) has become a new tool for urban heat island research. Taking Chenzhou as the research object, eight urban spatial form elements and land cover elements are calculated respectively through ArcGIS, Skyhelios and ENVI software. The calculation results are then rasterized and clustered in ArcGIS to obtain the LCZ map at a resolution of 200 m. Afterwards, the land surface temperature (LST) of different local climate zones in the four seasons from 2017 to 2018 is further analyzed using one-way ANOVA F-test and Student’s t-test. The results suggest that: (1) by adding localized LCZ classes and applying the semi-automatic algorithm on the Arc-GIS platform, the final overall accuracy reaches 69.54%, with a kappa value of 0.67, (2) the compact middle-rise buildings (LCZ-2′) and open low-rise buildings (LCZ-6) heavily contribute to the high LST of the downtown area, while the large low-rise buildings (LCZ-8) cause the high LST regions in the eastern part of the town, (3) obvious land surface temperature differences can be detected in four seasons among different LCZ classes, with high LST in summer and autumn. Built-up LCZ classes generally revealed higher LSTs than land cover LCZs in all seasons. The findings of this study provide better understandings of the relationship between LCZ and LST, as well as important insights for urban planners on urban heat mitigation.

Two novel altenusin-thiazole hybrids named altenusinoides A and B (1 and 2), a new benzothiazole derivative (3), and three known altenusin derivatives (4–6) have been obtained from the solid culture of the marine sponge-derived fungal strain, Alternaria sp. SCSIOS02F49. The structures of these new compounds were characterized by NMR, HRESIMS, and X-ray single crystal analysis. Compounds 1 and 2 possess an unusual altenusin-thiazole-fused skeleton core (6/6/5), and compound 3 represents the first benzothiazole derivative from fungi. Compounds 4 and 5 showed significant DPPH free-radical-scavenging activities with the prominent IC50 values of 10.7 ± 0.09 μM and 100.6 ± 0.025 μM, respectively. Additionally, compound 5 exhibited COX-2 inhibitory activity with an IC50 value of 9.5 ± 0.08 μM.

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A se ries of sol u ble flu o ri nated poly amides (4a-h) were syn the sized from 2-trifluoromethyl-4,4diaminodiphenylether (2) with var i ous ar o matic diacids (3a-c) and imide-containing diacids (3d-h) via di rect polycondensation with triphenyl phosphite and pyridine. Diamine 2 was pre pared through nucleophilic substi tu tion re ac tion of 2-chloro-5-nitrobenzotrifluoride and 4-nitrophenol in the pres ence of an hy drous K2CO3 to yield the dinitro com pound, fol lowed by cat a lytic re duc tion with hydrazine and Pd/C. These poly mers had in her ent vis cos i ties rang ing from 0.85 to 1.12 dL/g. All of the poly amides were sol u ble in aprotic po lar solvents such as NMP, DMAc, DMF, and DMSO. Poly mer films 4a-h had ten sile strengths of 77-95 MPa, elonga tions to break of 8-40%, and ini tial moduli of 1.6-2.2 GPa. The glass tran si tion tem per a tures of these polymers were in the range of 235-268 C, and the amount of car bon ized res i dues of the poly mers at 800 °C in nitro gen at mo sphere were above 52%.

Objective: To evaluate the immunization data quality in Shangyu District, East China.