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Objective： A tomato weight detection method based on image processing was established to realize non-contact tomato weight detection. Methods： The binary image of tomato was obtained through image processing. The geometric features of tomato were extracted by pixel statistics and minimum circumscribed rectangle method, and correlation analysis was made between the characteristics and the real value of tomato weight, then the regression model of tomato weight detection with geometric features as parameters was established. Results： Compared with the real size of tomato, the measurement error of transverse and longitudinal diameter of Tomato by minimum external rectangle method was less than 3%. In addition to fruit shape index, other geometric characteristics were linearly correlated with tomato fruit weight, and the correlation between positive characteristics and fruit weight was more significant. Three types of 20 models were established for prediction and evaluation. The multiple regression model with the parameters of tomato front projection area and perimeter, projection area of a side image and tomato transverse diameter had the highest accuracy, the regression coefficient was 0.962, the average relative error of detection value was 0.673%, and the average absolute error was 1.425 g. Conclusion： The model is suitable for the weight detection of tomatoes and other fruits or articles with similar axisymmetric shape characteristics.

AIM. To study the clinical effect of body composition-based lifestyle intervention in patients with polycystic ovary syndrome (PCOS). MATERIAL AND METHODS. In the period of November, 2020 – July, 2021, 91 patients diagnosed with PCOS in the First People's Hospital of Urumqi were prospectively selected and divided into a control group (46 cases) and an experimental group (45 cases) according to random number method. The patients in the control group were treated with Drospirenone and Ethinylestradiol tablets (II), while the patients in the experimental group were treated with Drospirenone and Ethinylestradiol tablets (II) and lifestyle adjustment based on body composition. The changes of the indices before and after 3 months of treatment were compared between the two groups. RESULTS. The indices of PCOS patients in the two groups after treatment (except 1 basal metabolic rate and muscle weight, 2. FSH and 3. HDL) were decreased, and the decrease in the experimental group was more significant (P < 0.05). Patients in the experimental group had significantly increased spontaneous ovulation and pregnancy rate / Conducive to ovulation and pregnancy. CONCLUSION. In PCOS patients, the combination of Drospirenone and Ethinylestradiol tablets (II) and lifestyle intervention based on human body components can improve reproductive hormone, glucose metabolism and insulin resistance more effectively, which is beneficial to spontaneous ovulation and pregnancy, and reduce the weight of patients.

A straightforward microfluidic approach has been developed to fabricate the monodisperse thermo‐responsive self‐bursting poly(N‐isopropylacrylamide) (PNIPAM) microcapsules for the rapid on‐demand release of liposoluble drugs. The PNIPAM microcapsules possess excellent structural integrity with a dense shell and spacious cavity, providing ample space for encapsulating liposoluble matters. The swollen hydrogel shells effectively prevent drugs leakage and contamination below the volume phase transition temperature (VPTT), while the shrunken hydrogel shells enable drugs to release from microcapsules above the VPTT. The microcapsules demonstrate rapid thermo‐responsiveness, with drug release occurring within 4–6 minutes and subsequent swelling taking place within 2–3 minutes. The PNIPAM microcapsules exhibit a reversible and repetitive swelling/shrinking response to temperature changes. The thermo‐responsive self‐bursting PNIPAM microcapsules exhibit great potential as microcarriers for encapsulating, storing, and rapidly releasing liposoluble substances such as drugs, fluorescent dyes, corrosion inhibitors, and other chemical ingredients. The simple, controllable and reproducible microfluidic approach presented here provides valuable guidance for the design and fabrication of monodisperse PNIPAM microcapsules. [ABSTRACT FROM AUTHOR]

Developing bifunctional catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is essential for the development of zinc–air batteries (ZABs), but several challenges remain in terms of bifunctional activity. FeCo2S4/N-S-rGO was prepared by in situ homogeneous growth of bimetallic sulfide FeCo2S4 on N, S-doped reduced graphene oxide. FeCo2S4/N-S-rGO exhibits a half-wave potential of 0.89 V for ORR and an overpotential of 0.26 V at 10 mA cm−2 for OER, showing significantly bifunctional activity superior to Pt/C (0.85 V) and RuO2 (0.41 V). Moreover, the FeCo2S4/N-S-rGO assembled ZAB shows a superior specific capacity and a power density of 259.13 mW cm−2. It is demonstrated that the interfacial electron redistribution between FeCo2S4 nanoparticles and heteroatom-doped rGO matrix can efficiently improve the electrochemical performance of the catalyst. The results provide new insights into the preparation of high-capability composite catalysts combining transition metal sulfides with carbon materials for applications in ZABs. [ABSTRACT FROM AUTHOR]

BACKGROUND Bactrocera dorsalis is a devastating pest on fruits and vegetables because the adult female is the key factor that determines the population density of offspring and the degree of host damage. Unfortunately, there is still a lack of effective female attractants for behavioral control. Males of B. dorsalis fed on methyl eugenol (ME) were shown to be more sexually attracted to females and, therefore, were more successful in mating over ME‐deprived males. RESULTS: In the current study, we demonstrated that (E)‐coniferyl alcohol (E‐CF), one of the ME metabolites in males, was highly attractive to sexually‐mature females in laboratory bioassays. During the dusk courtship period, mature females showed the highest response to E‐CF. However, there were no significant differences in olfactory responses to E‐CF between virgin and mated mature females. Moreover, no obvious signs and symptoms of toxicity or death were observed in mice during a 14‐day acute oral toxicity test. Toxicologically, no significant changes were observed in body weight, water intake, food consumption and absolute and relative organ weights between control and treated groups of healthy‐looking mice, implying that E‐CF could be regarded as non‐toxic. Furthermore, cytotoxicity assessment revealed that E‐CF was non‐toxic against human fetal lung fibroblast 1 (HFL1), human breast cancer (MDA‐MB‐231), mouse embryonic hepatocytes (BNL‐CL.2) and Spodoptera frugiperda ovary (SF‐9) cell lines. CONCLUSIONS: E‐CF proved to be an effective, promising and eco‐friendly lure to B. dorsalis females. Therefore, this study may facilitate the development of novel control strategies against B. dorsalis in the field. [ABSTRACT FROM AUTHOR]