In this study, a variety of polyhydroxyl antioxidant molecules were designed and studied at the level of BHandHLYP/6-311++G(d,p) with the help of density functional theory, and the reaction of capturing hydroxyl radical was theoretically simulated. Based on the reaction thermodynamic and kinetic data obtained from the free radical scavenging reaction mechanism. The effect of hydroxyl number, position, conjugation and active site on reaction mechanism was discussed. The results show that the reactant R3 has better kinetic and thermodynamic advantages in the simulation mechanism of hydroxyl radical scavenging. At 293K, the lowest relative Gibbs free energy of the transition state ΔGTS3-1 is 34.95 kJ•mol-1, and the corresponding reaction enthalpy becomes -148.32 kJ•mol-1, and Path III-1 is the dominant Path. Temperature did not affect the reaction mechanism of the reaction.

Edible mushrooms are highly cultivated by mushroom farmers in Sleman, Daerah Istimewa Yogyakarta, Indonesia because of its nutrition content that have benefit for health. The problem facing by the farmers is related with the disease caused by mites, locally called krepes. This research aims to study the variation of edible mushrooms which can be the host for the mites and its effect on the nutrition quality of the mushroom. Mites were inoculated into the mushroom baglog. The temperature and humidity were controlled during the mushroom’s growth. Proximate analysis was conducted to know the nutrition composition of the mushroom. The result showed that mites which caused krepes only growth in ear mushroom (Auricularia auricula) that has carbohydrate composition of 28.69%, the highest among edible mushrooms studied in this research. Generally, there were decreasing value in carbohydrate and protein composition with increasing value of water content in the edible mushrooms inoculated with the mites. Further study to investigate the specific type of carbohydrate used by the mites should be performed.

The paper studies four F1 hybrids obtained by crossing five parental genotypes, four of which are oriental in the role of mother (three of the Prilep type: P-23, P 18-50/4, P 76/86, and one of the Basmak type - MS 8/1) and a large-leaf Burley type (B-1/91) in the role of father, for the traits: yield of green leaf mass per stalk and per hectare, yield of dry leaf mass per stalk and per hectare and yield of seed per plant and per hectare. The experiment was placed on the experimental field at the Scientific Tobacco Institute - Prilep by Random block system in four repetitions for the vegetative period et 2019 and 2020. All appropriate cultural practices were applied during the growing season. The aim of this work was to study the mode of inheritance of stated agronomic traits, to detect heterosis in F1 generation and assess its economic viability. The most common mode of inheritance for the agronomic properties in the F1 generation is the intermediate, then the partial-dominant. In the inheritance of the yield of green and dry leaf mass per stalk, in the two years of investigation there is no occurrence of heterosis, while in the inheritance of the seed yield per plant in all combinations there is the occurrence of positive heterosis. The highest heterotic effect has MS 8/1 x B-9/91. In analyzing the yield of green and dry leaf mass and seeds in tons per hectare, a different vision was obtained, because the calculations are made at different planting distances of genotypes. Thus, for the yield of green leaf higher value than the more productive parent showed P 76/86 x B-9/91, while for the yield of dry leaf higher values than the more productive parents showed P 18-50/4 x B-9/91 and P 76/86 x B-9/91. In terms of seed yield per hectare, hybrids did not exceed the parents. The mode of inheritance of the agronomic traits per stalk indicates a shorter and more reliable successive period of time in the selection activity for the creation of new, superior varieties of toba