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Aufsatz
UVC Irradiation as a Surface Treatment of Polycarbonate to Generate Adhesion to Liquid Silicone Rubber in an Overmolding Process
(2024-04-18)
This study investigates the adhesion properties of polycarbonate (PC) and liquid silicone rubbers (LSR) through surface activation using ultraviolet C (UVC) radiation. While self-adhesive LSRs adhere easily to certain thermoplastic composites such as polybutylene terephthalate (PBT) and polyamides (PAs), bonding to PC typically requires surface treatment due to the lack of compatible functional groups. Previous methods like plasma or flame treatment have been effective, but the use of UVC radiation for surface ...
Aufsatz
Land degradation and the upper hand of sustainable agricultural intensification in sub-Saharan Africa - A systematic review
(2024-05-13)
Sub-Saharan Africa (SSA) faces severe land degradation, driven by a combination of human and natural factors. Deforestation, inadequate land management practices, and unsustainable farming methods are the primary causes. The historical trends reveal the impact of soil erosion and nutrient depletion on 70% of the soil and 65% of its total land area. Unchecked degradation poses a critical threat to economic growth and poverty reduction initiatives. The region's food security is intricately linked to the complex interplay ...
Aufsatz
Effect of storage conditions on soybean seed quality produced by smallholder farmers within two districts of Gauteng, South Africa
(2024-05-22)
Seed quality comprises of physical, physiological, and health attributes. Moreover, significant aspects of seed quality include seed viability and vigour. Maintaining good seed quality under sub-optimal storage conditions is one of the major challenges smallholder soybean farmers face. Hence, this study aimed to determine the effect of on-farm storage conditions on the seed quality of soybeans from smallholder farmers within the Gauteng Province, South Africa. The objectives of this study were to i) evaluate and ...
Aufsatz
Influence of season and phytochemicals on the elemental composition of kobs’ diets in Old Oyo National Park, Nigeria
(2024-02-20)
Phytochemicals or plant secondary metabolites (PSMs) are known to counteract mineral nutrients (MNs) utilisation in herbivorous wildlife, yet studies on the interactions between PSMs and MNs in relation to herbivory, particularly for kobs (Kobus kob) are scarce. Composite samples of each of five major forage plants of kobs’ (Grewia mollis, Afzelia africana, Gardenia aqualla, Maranthes polyandra and Andropogon gayanus) were randomly collected in and around feeding sites of kobs in both dry and wet season. Using standard ...
Aufsatz
Food security status and its determinants: A comparative study between farm households under government and non-government agricultural extension services in Bangladesh
(2024-02-29)
The ability to obtain food security is essential to human existence. Secure food access can have a variety of positive effects, such as economic expansion, the creation of jobs, and the eradication of poverty. This study assessed the food security status of farm households and its determinants in the Dinajpur district of Bangladesh. Efforts were also made to assess and compare the socio-economic demographics and item-wise calorie intake among households receiving government and non-government agricultural extension ...
Aufsatz
Influence of deep rolling at different temperatures on near-surface and mechanical properties of a Maraging C250 steel
(2024-04-27)
Due to an outstanding combination of high strength and fracture toughness Maraging steels are used in numerous industries, e.g., in the aerospace sector. The high strength can be attributed to precipitation strengthening by conventional age-hardening heat treatments. However, as many of the envisaged applications will suffer from cyclic loadings, the fatigue properties are of significant interest in terms of a reliable use. Generally, Maraging steels are characterized by a relatively low fatigue strength limiting the ...
Aufsatz
Performance of pacu (Colossoma macropomum) fed varying dietary inclusion levels of fish visceral and duckweed (Lemna minor) as replacement for fish and soybean meals
(2024-01-23)
The performance of Colossoma macropomum subjected to a six-month feeding trial using duckweed (Lemna minor) and fish visceral as partial replacements for soybean meal and fishmeal respectively was evaluated in this study. A total of one thousand five hundred (1500) nearly same sizes (average size 45 g) juveniles of C. macropomum were sourced from the nearby research man-made lake and subjected to proper acclimatisation for two weeks prior to the commencement of the feeding trial. One hundred (100) juveniles per ...
Aufsatz
Effect of different diets containing varying inclusion levels of Moringa oleifera leaf meal on growth, mineral composition and meat quality of the edible land snails Archachatina marginata and Achatina fulica
(2024-02-25)
This study examined the effect of different dietary inclusion levels of Moringa oleifera leaf meal on growth, haemolymph mineral composition and meat quality of Archachatina marginata and Achatina fulica. A total of one hundred and forty four (144) juvenile snails of A. marginata= 72 and A. fulica= 72, were used for the study. Eighteen (18) snails of each species were subjected to four dietary treatments (0%, 10%, 15% and 20%) of M. oleifera leaf meal in three replicates of six (6) snails per replicate over a period ...
Aufsatz
High Consistency Silicone Rubber Foams
(2024-04-23)
Silicone elastomers are high-performance plastics. In the extrusion process, only high-consistency silicone rubbers were used. In order to reduce the cost and weight, silicone rubbers can be foamed during processing. In this study, high-consistency silicone rubber is processed with different physical and chemical blowing agents. The resulting reaction kinetics, as well as the mechanical and morphological properties, had been investigated and compared with each other. This showed that the chemical blowing agent ...
Aufsatz
Cost and return analysis of organic and conventional farming systems in the Ganga River Basin, India
(2024-02-26)
Conventional farming (CF) has significantly increased the aggregate supply of food grains and ensured food security for the growing population in India. However, it proved environmentally unsustainable due to its higher reliance on chemical inputs. Organic farming (OF) becomes an alternative approach that ensures the sustainability of the agricultural system. But, the transition from CF to OF can be a lengthy process, and farmers may experience income loss during its course. Farmers will switch only when they are ...