Gas chromatography-ion mobility spectrum (GC-IMS) is used to analyze and compare the differences in aroma among different tobacco samples. The aroma substances in tobacco samples in Jilin Changchun are the richest, while those in Guangdong Nanxiong are the lowest. The concentrations of aroma substances such as decanal, 1-hydroxy-2-propanone, and 2-methylbutanol were the highest in Guangdong Nanxiong of the three. The concentration of 1-hexanol, cyclohexanone, pentanoic acid, and other aroma substances in Fujian Nanping was high. The concentration of 2-acetylfuran, 2-octanol, isopentanol, 3-methylvaleric acid, phenylacetic acid, and other aroma substances in Changchun area of Jilin Province was low. Through principal component analysis and similarity research, both tobaccos can be distinguished by their production areas and grades from the same.

Article Corrigendum to “Aroma components of tobacco powder from different producing areas based on gas chromatography ion mobility spectrometry” was published on January 1, 2022 in the journal Open Chemistry (volume 20, issue 1).

Replacement control technology is a sustainable strategy for the control of invasive weeds. Two consecutive years of field experiments were conducted in Xichang city to assess the ecological and economical possibility of replacement control of Eupatorium adenophorum (Spreng.) King & H.Rob. with maize. Four treatment groups were planted with maize at different densities after cutting E. adenophorum. Two reference groups were set by not treating and only cutting the aerial parts of E. adenophorum. All maize replacements in the “after tillage” treatments provided control effects of up to 100% and significantly reduced water and fertilizer use by E. adenophorum. Maize replacement provided a substantial economic benefit of up to 20,273.50 and 23,633.22 yuan/hm² in two consecutive years and increased incomes. Evaluated in terms of niche theory, the large leaves as well as high plant cover assisted in effectively occupying the available niche and reduced light interception, seed germination and growth of E. adenophorum. This study provided a scientific basis for the sustainable and eco-friendly control of weeds by ecological methods.

We report the synthesis and characterization of novel chromophores based on chlorogenic acid. The structure analysis and photophysical properties were studied to investigate the structure of the new chromophores. Such chromophores showed a great improvement in water solubility, which can explain application areas such as molecule probes, SHG imaging, and photodynamic/photothermal therapy. In addition, both chromophores A and B displayed good thermal stability with an onset decomposition temperature over 200 °C. These results showed that chromophores A and B had good thermal stability and nonlinear optical properties and are a promising candidate for practical use.