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Jingru Zhang,Xiaowen Cheng,Lulu Chang,Lele Zhang,Shaoying Zhang 한국식품과학회 2021 Food Science and Biotechnology Vol.30 No.4
Alternaria alternata is a pathogenic fungus thatinfects jujube fruit and leads to serious economic losses. Inthis paper, the antifungal activity of chitosan combinedwith sodium silicate against A. alternata in vitro andin vivo was investigated, and the possible antimicrobialmechanisms were explored. Results showed that the sporegermination and colony expansion of A. alternata weresignificantly inhibited by chitosan. Chitosan treatmentinduced the leakages of intercellular electrolytes, nucleicacids, and soluble protein of A. alternata. Meanwhile,chitosan damaged the cell morphology and membraneintegrity of A. alternata. The combination of chitosan andsodium silicate was more effective than chitosan alone. Inaddition, the effect of chitosan and sodium silicate couldsignificantly decrease natural rot rate and delay lesionexpansion of winter jujube. Collectively, chitosan combinedwith sodium silicate had the potential to controlpostharvest diseases of fruit caused by A. alternata.
Rongjun Qu,Xilu Ma,Minghua Wang,Changmei Sun,Xiaomei Sun,Shaoying Sun,Ying Zhang,Ping Yin 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
A series of low generation dendrimer polyamidoamine grafted silica gels (named SiO2-G1.0, SiO2-G2.0,SiO2-G3.0) were synthesized via the homogeneous route. The new materials were characterized byscanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), thermal analysis,pore and surface area analysis, X-ray diffraction analysis (XRD) and elemental analysis. The adsorptionproperties of the three products for Au3+ were studied by batch methods. The adsorbents prepared viathe homogeneous route showed higher adsorption capacities than those via the heterogeneous route. The maximum adsorption capacities for the three could reach up to 1.48, 2.45, and 2.21 mmol g-1,respectively.
Mbuji Amosi Leonard,Gong Xueyan,Li Fen,Yang Lei,Shi Xueyan,Peng Zhengqiang,Zhang Ying,Wu Shaoying 한국곤충학회 2022 Entomological Research Vol.52 No.5
Cannibalism behaviour in the Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) is among of liming factor for mass production of the larvae for laboratory experiment. To understand the change of cannibalism, larvae of 1st, 2nd, and 3rd were used to study cannibalism they were put on the 3rd, 4th, and 5th larvae growth stages in a density of 30, 40, 50, 60, and 70. In this study, the results showed that the functional response of the 3rd -5th instar larvae to the 2nd larvae and the 4th–5th instar larvae to the 3rd larvae and 5th and 6th instar larvae to the 4th larvae fitted well with the Holling II mode. The maximum predation of the 3rd-5th instar larvae on the 2nd instar larvae were 27.17, 74.63, and 232.6 respectively, the maximum predation of the 4th–5th instar larvae on the 3rd instar larvae were 76.92 and 11.82 respectively, and the maximum predation of the 5th–6th instar larvae on the 4th instar larvae were 15.83 and 10.40. The predation of the older larvae to the younger larvae increased with the increase of the density of the younger larvae. This research aims at selecting the minimum number of larvae that will be effective and sustainable for laboratory experiments and minimizing the development of cannibalism in S. frugiperda, reduces crowding for larvae management and promoting healthy larvae. This study provides a pavement of managing larvae ensuring massive indoor larvae rearing to reduce the challenge of inadequate larva for the experiment.