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This study aims to examine the effects of various physical and chemical pre-treatments on antioxidant properties of tree bean (Parkia roxburghii G. Don) in combination with storage conditions.

The whole pods and seeds of tree bean were treated with gamma rays (γ-rays), sodium hypochlorite (NaOCl), chlorine dioxide (ClO₂) and hydrogen peroxide (H₂O₂) and stored at room temperature (RT, 25°C) for 30 days. The physical and chemical pre-treated seeds and pods were compared with the same stored at RT and refrigerated storage at 4°C and −20°C. During storage, physical (moisture content) and antioxidants like total phenolics, ascorbate content, reduced glutathione, total flavonoids, along with free radical scavenging activities (FRSA) were measured.

Chemical pre-treatments with NaOCl, ClO₂ and H₂O₂ significantly accelerated (p = 0.05) the total phenolics (1.9 mg/g FW in seeds and 2.4 mg/g FW in pods), flavonoids content (0.3 mg/g FW each in seeds and pods) and ABTS activities (73.3 per cent in seeds and 92.3 per cent in pods) at 30 days of storage. A significant decrease (p = 0.05) in ascorbate content (6.1 mg/g FW in seeds and 3.5 mg/g FW in pods), reduced glutathione (5.1 mg/g FW in seeds and 3.7 mg/g FW in pods), FRAP (0.3 mg equi Fe/g FW in seeds and 0.4 mg equi Fe/g FW in pods) and reducing power (1.8 mg/g FW in seeds and 3.7 mg/g FW in pods) was observed under all the treatments at 30 days of storage. However, DPPH increased under γ-irradiation and decreased under chemical pre-treatments, storage at RT and refrigerated storage. The overall result showed that pre-treatment of H₂O₂ at 10-20 mM maintains antioxidants and radical scavenging activities in tree bean during storage.

The application of H₂O₂ at 10-20 mM prior to storage of tree bean maintains the physical, antioxidant properties and FRSA in tree bean seeds and pods as compared to natural ambient conditions. Hence, this technique will help in improving the keeping quality of this legume and avoid spoilage after harvest for an extended period.

Mr John Roberts, C.Eng., F.R.Ae.S., F.M.I.MECH.E., chief executive of the Dunlop Aerospace Group headquarters in Coventry, has recently been elected a Fellow of the Royal Society of Arts (FRSA).

Graham S. Clarke, TD MA FCA FRSA, financial director of Fairey Holdings for the last four years, has been appointed managing director of its Energy and Military Engineering Division.

While the topic of women's entrepreneurship continues to grow in academic appeal, the policy aspect is one that has received limited scholarly attention, especially in the context of developing countries. To address this gap in scholarship, the purpose of this paper aims to critically explore women's entrepreneurship policy in Tanzania. The research question asks: How are policies designed to encourage and support entrepreneurship in Tanzania gendered, and how might such policies be (re)designed so that they are more relevant to women entrepreneurs in the Tanzanian context? The authors contribute to extant scholarship by: drawing attention to the particular context for women's entrepreneurship in Tanzania; identifying gender biases inherent in current entrepreneurship policies; offering some recommendations for policymakers and identifying areas worthy of future research attention in this area.

The study builds on the Global Women's Enterprise Policy project. The authors apply an adapted reading guide technique to analyse and critique relevant entrepreneurship policy documents in Tanzania. The reading guide examines the category and type of document being analysed, key themes, content, language and imagery, as well as the key policy recommendations being offered and their relevance to women's entrepreneurship in Tanzania and the wider sub-Saharan African region. Completed reading guide templates are then coded and collated into an excel spreadsheet. Findings are discussed and critiqued within a regulative, normative and cultural-cognitive framework.

The study provides rich and valuable insights into the unique context for women's entrepreneurship in Tanzania, shedding new light on how women's entrepreneurship is supported in a particular region of sub-Saharan Africa. Findings reveal that while current policy acknowledges the important role women play in their communities, especially in terms of their contribution to labour, it is geared more towards small and medium-sized enterprise (SME) development than entrepreneurship; this is despite the fact that entrepreneurship is identified as a means to address sustainable development challenges (notably unemployment and poverty) and expand opportunities for socially disadvantaged groups, especially women. Existing policy is essentially “context neutral” and hence relatively ineffective; the gender focus is lacking and there is a failure to take account of the specific context in which Tanzanian women entrepreneurs have to operate. The authors argue for policies designed to support women's entrepreneurship to be formalised and contextualised in their specific geographical and cultural setting. The “institutional pillars” framework allows us to identify areas where contextualisation of women's entrepreneurship policies could be enhanced.

The study implies that, to be effective, policies designed to support women's entrepreneurship need to be formalised and contextualised to their specific geographical and cultural setting. Some areas where this might be achieved are identified. Avenues for future research in this area are also suggested.

The value of the paper lies in its focus on Tanzania, and its critique of existing policies from a gender and institutional perspective. It also enhances understanding of the unique context in Tanzania for entrepreneurship.

In my introductory article, “Airworthiness — A Systems Approach”, last March, I expressed the hope that eminent engineers from all the disciplines and activities on which “total airworthiness” (my phrase) depends, would be persuaded by Aircraft Engineering to contribute articles on their own specialisations.

This is the title of the summary of the Report of the Committee of Inquiry into the Engineering Profession, and since the Committee was chaired by Sir Monty Finniston, it has now become known as the Finniston Report. The full text of the Report, containing some 65,000 words is published by HMSO, but it all comes down to one simple statement… Our Future (in) Engineering.

Black cumin (Nigella sativa L.) is well known for its strong, hot, peppery taste and has many nutritional, pharmaceutical and traditional therapeutic uses. The aim of this study was to investigate the antioxidant effect of different solvent extracts of black cumin seed to retard lipid and protein oxidation in raw ground pork meat during refrigerated storage (4 ± 1°C) for nine days.

Black cumin extracts (BCEs) were prepared using different solvents, namely, ethanol, water, ethanol:water (60:40) and methanol:hot water (60:40). Extracts were analysed for total phenolic content (TPC), 1,1 diphenyl-2-picrylhydrazil (DPPH) radical scavenging activity and reducing power. Based on the results, water extract (WE) and ethanol–water extract (EHWE) of black cumin were selected and incorporated at 1.5 per cent into freshly minced pork meat and compared with a synthetic antioxidant, butylated hydroxytoluene (BHT; 100 ppm), in retarding lipid and protein oxidation. Treated and control samples were aerobically packed in low-density polyethylene bags for analysis of various parameters (pH, colour and odour score, peroxide, lipid and protein oxidation) during nine-day refrigerated storage study.

Results showed that BCEs had a good amount of TPC (4.4-7.4 mg gallic acid equivalents/g) and also DPPH scavenging activities (33.96-44.23 per cent), with WE and EHWE extracts showing highest reducing power and promising antioxidant capacity. Hence, BCEs (WE and EHWE) incorporated at 1.5 per cent into freshly minced pork meat was tested, compared to BHT (100 ppm) and control samples, in retarding lipid and protein oxidation during storage. In BCE-treated samples, thiobarbituric acid reacting substances, free fatty acids, peroxide, formation of protein carbonyls and off-odour or rancid odour development were lower than control and values were comparable with BHT. Incorporation of BCE did not negatively affect the colour of ground pork.

BCEs (WE and EHWE) at 1.5 per cent inhibited protein and lipid oxidation and it could be exploited commercially as an effective alternative in retarding oxidative deterioration of meat products.

The purpose of this paper is to present an optimisation of four-point star-shaped structures produced through additive manufacturing (AM) polylactic acid (PLA). The study also aims to investigate the compression failure mechanism of the structure.

A Taguchi L₉ orthogonal array design of the experiment is adopted in which the input parameters are resolution (0.06, 0.15 and 0.30 mm), print speed (60, 70 and 80 mm/s) and bed temperature (55°C, 60°C, 65°C). The response parameters considered were printing time, material usage, compression yield strength, compression modulus and dimensional stability. Empirical observations during compression tests were used to evaluate the load–response mechanism of the structures.

The printing resolution is the most significant input parameter. Material length is not influenced by the printing speed and bed temperature. The compression stress–strain curve exhibits elastic, plateau and densification regions. All the samples exhibit negative Poisson’s ratio values within the elastic and plateau regions. At the beginning of densification, the Poisson’s ratios change to positive values. The metamaterial printed at a resolution of 0.3 mm, 80 mm/s and 60°C exhibits the best mechanical properties (yield strength and modulus of 2.02 and 58.87 MPa, respectively). The failure of the structure occurs through bending and torsion of the unit cells.

The optimisation study is significant for decision-making during the 3D printing and the empirical failure model shall complement the existing techniques for the mechanical analysis of the metamaterials.

To the best of the authors’ knowledge, for the first time, a new empirical model, based on the uniaxial load response and “static truss concept”, for failure mechanisms of the unit cell is presented.

Additive Manufacturing technology (AMT) is swiftly gaining prominence to induce automation and innovation in manufacturing systems. It holds immense potential to change supply chain dynamics by providing the possibility of printing objects on demand. This study thus formulates and analyzes the framework to incorporate AMT to handle the spare parts supply chain management (SPSCM) in capital-intensive industries by identifying and assessing the critical success factors (CSFs).

Assessment of the CSFs is performed using the novel Grey Causal Modeling method (GCM) with the objective of making SPSCM resilient and efficient. GCM conducts causal analysis by taking into consideration cause, effects, the objectives, and the situations.

Findings indicate that; Logistics Lead Time (SD4), Time to manufacture (SD3), Management Support (SD11), and Risk Management (SD20) are the most prominent causal factor having a maximum impact when incorporating AMT in SPSCM. The results also reveal that the performance of manufacturing organizations that adopt AMT is substantially influenced by internal and external factors such as Management Support (SD11) and Government Regulations (SD16).

This research provides valuable information for getting the global spare parts supply chain equipped for the post-COVID age, where digital technologies such as AMT will be fundamental for bolstering supply chain resilience and efficiency.

This research proposes a framework for performance assessment when incorporating AMT in SPSCM. Study also demonstrates methodological application of novel Grey Causal Modelling technique using a real case in a spare parts manufacturing industry in India.