Macadamia,as the main industry of rural revitalization in Guangxi,has high economic value and good ecological benefits.However,the traditional way of drying macadamia nuts after harvest is very extensive.It cannot gua...Macadamia,as the main industry of rural revitalization in Guangxi,has high economic value and good ecological benefits.However,the traditional way of drying macadamia nuts after harvest is very extensive.It cannot guarantee the quality and can cause mildew easily,thereby seriously restricting the industrial development.This paper introduced a device with a weighing device,which allows operators to understand the drying effect in time and thus reduces the loss of nutrition.The device solves the problem of relying on the weather to harvest,and ensures the drying effect of macadamia nuts.展开更多
Macadamia nuts (Macadamia integrifolia) grown in Venezuela have showed an average total fat content of 70%. Oleic acid (18:1) was the main monounsaturated fatty acid (MUFA) (51.3%), followed by palmitoleic acid (16:1,...Macadamia nuts (Macadamia integrifolia) grown in Venezuela have showed an average total fat content of 70%. Oleic acid (18:1) was the main monounsaturated fatty acid (MUFA) (51.3%), followed by palmitoleic acid (16:1, 22.6%). The content of polyunsaturated fatty acids (PUFAs), C18:2 and C18:3 represented 5.4%. Thus, MUFAs and PUFAs together constituted more than 80% of the total fatty acids present. Trans-vaccenic acid was also present (3%). As regards to other phytochemical compounds, tocopherols and tocotrienols were not found in the sample, but the presence of squalene was detected.The antioxidant activity (44.2%) of the extract was produced by the phytochemicals present.展开更多
Green synthesis methods have garnered significant attention as eco-friendly alternatives to conventional chemical approaches,which often involve hazardous substances.In this study,macadamia nut shell extract was used ...Green synthesis methods have garnered significant attention as eco-friendly alternatives to conventional chemical approaches,which often involve hazardous substances.In this study,macadamia nut shell extract was used as a natural stabilizing and capping agent for the sustainable and environmentally friendly synthesis of zinc oxide nanoparticles(ZnO NPs)and copper oxide NPs(CuO NPs).The natural compounds present in the macadamia nut shell extract facilitate the formation of these NPs.The synthesized ZnO and CuO NPs were confirmed by various types of spectroscopic and microscopic techniques.X-ray diffraction(XRD)analysis confirmed that the ZnO NPs exhibited a hexagonal wurtzite structure,whereas the CuO NPs displayed a face-centered cubic lattice structure.The green-synthesized NPs demonstrated excellent antioxidant and antimicrobial properties against both gram-positive and gram-negative bacteria.Moreover,the photocatalytic efficiency of the NPs was assessed by examining the degradation of tetracycline,with ZnO demonstrating superior performance to CuO.The antimicrobial activities of the ZnO and CuO NPs were tested against Staphylococcus aureus(strain 902),Escherichia coli(strain 443),Aspergillus niger,and Candida albicans,and promising results were obtained.Furthermore,both ZnO and CuO NPs exhibited synergistic effects when combined with antibiotics.The newly developed green-synthesized ZnO and CuO NPs are simple,cost effective,environmentally friendly,and utilized for various applications,including food packaging,biosensors,and catalysis in pharmaceutical reactions.展开更多
Macadamia has the highest economic value and has always enjoyed the reputation of"king of dried fruits".In the process of digital management,irrigation is the most widely used.This paper designs the automati...Macadamia has the highest economic value and has always enjoyed the reputation of"king of dried fruits".In the process of digital management,irrigation is the most widely used.This paper designs the automatic control drip irrigation device in the digital management of macadamia nuts,including drip irrigation pipe,soil moisture sensor,motor,water storage chamber,water pump and central controller,and then gives an implementation scheme.The device is not only convenient for laying and positioning,but also convenient for controlling the overall irrigation water consumption during each drip irrigation and accurate use and improving the level of digital management.展开更多
基金Supported by Guangxi Science and Technology Program Project of China (Guike AD19245169)Yulin City Scientific Research and Technology Development Plan Project (Yu Shi Ke 20202001,2019Cxpt00A4,Yu Shi Ke 20204038)。
文摘Macadamia,as the main industry of rural revitalization in Guangxi,has high economic value and good ecological benefits.However,the traditional way of drying macadamia nuts after harvest is very extensive.It cannot guarantee the quality and can cause mildew easily,thereby seriously restricting the industrial development.This paper introduced a device with a weighing device,which allows operators to understand the drying effect in time and thus reduces the loss of nutrition.The device solves the problem of relying on the weather to harvest,and ensures the drying effect of macadamia nuts.
文摘Macadamia nuts (Macadamia integrifolia) grown in Venezuela have showed an average total fat content of 70%. Oleic acid (18:1) was the main monounsaturated fatty acid (MUFA) (51.3%), followed by palmitoleic acid (16:1, 22.6%). The content of polyunsaturated fatty acids (PUFAs), C18:2 and C18:3 represented 5.4%. Thus, MUFAs and PUFAs together constituted more than 80% of the total fatty acids present. Trans-vaccenic acid was also present (3%). As regards to other phytochemical compounds, tocopherols and tocotrienols were not found in the sample, but the presence of squalene was detected.The antioxidant activity (44.2%) of the extract was produced by the phytochemicals present.
基金the Faculty of Science and Technology,Thammasat University Fundamental Fund(TU-FF2569/4824641)the Thailand Science Research and Innovation Fundamental Fund.
文摘Green synthesis methods have garnered significant attention as eco-friendly alternatives to conventional chemical approaches,which often involve hazardous substances.In this study,macadamia nut shell extract was used as a natural stabilizing and capping agent for the sustainable and environmentally friendly synthesis of zinc oxide nanoparticles(ZnO NPs)and copper oxide NPs(CuO NPs).The natural compounds present in the macadamia nut shell extract facilitate the formation of these NPs.The synthesized ZnO and CuO NPs were confirmed by various types of spectroscopic and microscopic techniques.X-ray diffraction(XRD)analysis confirmed that the ZnO NPs exhibited a hexagonal wurtzite structure,whereas the CuO NPs displayed a face-centered cubic lattice structure.The green-synthesized NPs demonstrated excellent antioxidant and antimicrobial properties against both gram-positive and gram-negative bacteria.Moreover,the photocatalytic efficiency of the NPs was assessed by examining the degradation of tetracycline,with ZnO demonstrating superior performance to CuO.The antimicrobial activities of the ZnO and CuO NPs were tested against Staphylococcus aureus(strain 902),Escherichia coli(strain 443),Aspergillus niger,and Candida albicans,and promising results were obtained.Furthermore,both ZnO and CuO NPs exhibited synergistic effects when combined with antibiotics.The newly developed green-synthesized ZnO and CuO NPs are simple,cost effective,environmentally friendly,and utilized for various applications,including food packaging,biosensors,and catalysis in pharmaceutical reactions.
基金Supported by Guangxi Science and Technology Program Project of China(Guike AD19245169)Yulin City Scientific Research and Technology Development Plan Project(Yushike 20202001,2019Cxpt00A4,Yushike 20204038).
文摘Macadamia has the highest economic value and has always enjoyed the reputation of"king of dried fruits".In the process of digital management,irrigation is the most widely used.This paper designs the automatic control drip irrigation device in the digital management of macadamia nuts,including drip irrigation pipe,soil moisture sensor,motor,water storage chamber,water pump and central controller,and then gives an implementation scheme.The device is not only convenient for laying and positioning,but also convenient for controlling the overall irrigation water consumption during each drip irrigation and accurate use and improving the level of digital management.
