Research progress on the measurement of insect sensitive wavelength.

Insects use subtle and complex visual systems to capture spectral information and guide life activities. Spectral sensitivity of insect describes the relationship between the threshold of insect response to light stimulation and wavelength, which is the physiological basis and necessary condition for the generation of sensitive wavelength. The sensitive wavelength is the light wave with the strong reaction at the physiological or behavioral level of insects, which is the special and specific manifestation of spectral sensitivity.

Electronic structure and second-order nonlinear optical properties of lemniscular [16]cycloparaphenylene compounds.

Chiral organic compounds are excellent second-order nonlinear optical (NLO) materials due to their inherent non-symmetric electronic structures combined with the advantages of organic compounds. At present, density functional theory (DFT) has become a powerful tool for predicting the properties of novel materials. In this paper, based on chiral lemniscular [16]cycloparaphenylene, three novel compounds are designed by introduction of donor/acceptor units and their combinations.

Theoretical study on the electronic structure and second-order nonlinear optical properties of benzannulated or selenophene-annulated expanded helicenes.

Currently, discovering new materials with superior second-order nonlinear optical (NLO) performance has become a very hot research topic in the fields of chemistry and materials science. Now, density functional theory (DFT) has become a powerful tool to predict the performance of novel materials. In this paper, based on benzannulated and selenophene-annulated expanded helicenes, twenty-six helicenes are designed by introduction donor/acceptor moieties and their combinations at different substituent positions.

[Effects and mechanism of hypoxia exposure on related genes in brown fat tissue of obese mice based on mRNA expression profile microarray].

Objective: This study intended to screen differentially expressed genes and pathways in Brown Adipose Tissue (BAT) of obese mice after the intervention of hypoxia by mRNA expression profile microarray, exploring the mechanism of hypoxia activated BAT.

Methods: Thirty C57BL/6J male mice were divided into the normal diet control group (N, =8), high-fat diet control group (OB, =8) and high-fat diet hypoxia group (H, =8). Group H was intervened by hypoxia exposure in the oxygen concentration of 11.

Application of classical models of chirality to optical rectification.

Classical models of chirality are used to investigate the optical rectification effect in chiral molecular media. Calculation of the zero frequency first hyperpolarizabilities of chiral molecules with different structures is performed and applied to the derivation of a dc electric-dipole polarization. The expression of second-order nonlinear static-electric-dipole susceptibilities is obtained by theoretical derivation in the isotropic chiral thin films.

Optical rectification at isotropic chiral film composed of tripod-like molecules.

In the paper, the three-coupled-oscillator model presented by us is used to study the optical rectification in isotropic chiral films. The zero frequency hyperpolarizabilities of chiral molecules with a tripod-like structure are calculated. The expressions of the static-electric polarization and the relations between the optical rectification and the microscopic parameters of chiral medium are obtained by theoretical derivation.