AMA, Agricultural Mechanization in Asia, Africa and Latin America (AMA) (issn: 00845841) is a peer reviewed journal first published online after indexing scopus in 1982. AMA is published by Farm Machinery Industrial Research Corp and Shin-Norinsha Co. AMA publishes every subjects of general engineering and agricultural engineering. Shenyang Jianzhu Daxue Xuebao (Ziran Kexue Ban)/Journal of Shenyang Jianzhu University (Natural Science) General Medicine (ISSN:1311-1817) Chinese Journal of Evidence-Based Medicine Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation Lizi Jiaohuan Yu Xifu/Ion Exchange and Adsorption
AMA, Agricultural Mechanization in Asia, Africa and Latin America (ISSN: 00845841) is a peer-reviewed journal. The journal covers Agricultural and Biological Sciences and all sort of engineering topic. the journal's scopes are in the following fields but not limited to:
The chemical composition of the essential oil extracted from the dried aerial parts of Thymus zygis harvested from the Khenifra region (central Middle Atlas of Morocco) was studied by gas chromatography coupled with mass spectrometry (CPG and CPG / MS). Fifty-four (54) constituents, representing (99.98%) of the essential oil have been identified. The majority compounds are: Linalool (4.79%), Camphene (4.00%), Thymol (38.59%), Carvacrol (4.69%), o-cymene (19.11%) and β-E- ocimene (10.20%) with a total percentage of 81.38%. The insecticidal activity was achieved against Aphis fabae. This preliminary study showed that the essential oil of Thymus zygis has a high toxicity towards this insect. The results of the tests showed a very important activity during 24 hours of the treatments confirmed by the values of LD50 and LD90. This activity was probably due to its major constituents. The antibacterial activity was studied in vitro against gram-positive bacteria, Bacillus subtilis (CECT 498) and Staphylococcus aureus (CECT 240), gram-negative bacteria, Escherichia coli (CECT 516), and Micrococcus luteus (CECT 244). The results of the tests helped to quantitatively assess the antibacterial activity by searching for minimum inhibitory concentrations of MIC and minimum bactericidal concentrations of CMB, which have a variable activity depending on the strain tested. The study of the antioxidant activity of Thymus zygis oil compared with the usual antioxidants α-tocopherol and ascorbic acid showed that this oil has an antioxidant effect.
The aimed of research to find was treatment organic matter (sugar cane bagas) and non non organic matter to water capacity of soil to soybean, to find the optimal soil moisture of the alfisol soil with organic matter (sugar cane bagas) and non-organic matter (sugar cane bagas) what are available to crop growth and yield. The results show that there is a significant interaction between the treatment of organic material and the water volume on the dry weight of the total of plant (the age is 2 weeks after planting), the ratio of wide leaf (the age is 2 and 4 weeks after planting), and the number of seeds. On the other hand, there is no interaction with other components. The treatment of water volume has real influence and it is really seen on all growth components and products except for the relative rapid growth of plant which has the weight of 100 seeds and harvest index. The best treatment of water volume is seen on the giving of water volume on field capacity and 500 ml. On the other hand, the treatments of organic matter tend to show a good result rather than without giving organic matter even though most of them are not real.
To counter climate change and achieve sustainable agriculture goals, farmers must follow sustainable agriculture practices. Several factors have been described as influencing farmers' decisions to adopt sustainable agricultural practices, but adoption remains poor, especially in Africa. Based on the theory of planned behavior extended with constructs from the Norms Activation Theory, we investigate the adoption of sustainable agricultural practices by cocoa farmers in Côte d'Ivoire. The data was derived from a survey of 570 cocoa farmers conducted in 2020. We used structural equation model (SEM) to look for correlations between variables. The results indicate that subjective norm, personal norm, attitude, and perceived behavioral control are significantly positively correlated with farmers' Intention toward Sustainable Agricultural Practices and that farmers' personal ecological norm is affected both by the Awareness of the consequences of their action and their subjective norm when their attitude is only affected by Awareness of the consequences.
This study presents analysis of nonlinear vibration of functionally graded (FG) micro-beams subjected to axial compressive load and resting on elastic foundation in framework of the Euler-Bernoulli beam theory (EBT) and nonlocal strain gradient theory (NSGT). The FG micro-beam composed of two materials including metal and ceramic is considered in which, the material properties change according to a simple power law of the coordinate in the thickness direction. The expressions of nonlinear frequencies of the FG micro-beams with simply-supported (S-S) and clapmed-clamped (C-C) boundary conditions are obtained in the analytical forms. The accuracy of the obtained results for the FG micro- beams is verified by comparing the obtained solutions with the published ones. Influences of some important parameters on the nonlinear vibration responses of the FG micro-beams are examined and discussed.
This study proposes a nonlinear dynamic model for a novel hydro-pneumatic suspension system of an earth-moving equipment based on traditional dynamic model with changing the properties of the elastic and damping elements with an auxiliary air chamber. And then, a quarter-vehicle dynamic model of suspension system is set up to evaluate and compare vehicle ride comfort performance between novel hydro-pneumatic suspension system and traditional hydro-pneumatic suspension system under the different operating conditions of vehicle via the root mean square (r.m.s) acceleration responses of vehicle body (awz) according to international standard ISO 2631-1:1997 and power spectral density (PSD) acceleration responses of vehicle body. The numerical simulation results indicate that awz values and peak amplitude values with the novel hydro-pneumatic suspension system respectively reduce in comparison with the traditional hydro-pneumatic suspension system. Especially, vehicle ride comfort performance with novel hydro-pneumatic suspension system significantly improves in the low frequency region of from 0.5 Hz to 10 Hz when vehicle moves on from ISO class C road surface at speed of 40km/h and full load. Finally, the different operating conditions of vehicle are chosen to verify and evaluate the effectiveness of the novel hydro-pneumatic suspension system in comparison with the traditional hydro-pneumatic suspension system. The obtained results indicate that the proposed system significantly performs better than the traditional hydro-pneumatic suspension system does in terms of ride comfort of vehicle.