Journal of Environmental and Development Studies

The Effect of Centrifugation Speed on the Characteristics of Bromelin Enzyme Crude Extract from Flesh, Core and Peel Sipahutar Pineapple

Hendri F P Purba — 2024-09-11

Bromelain enzymes can be utilized as a food supplement and pharmacy manufacturer. Pineapple is a natural source of bromelain enzymes. The centrifugation process is an extraction process to produce a crude extract of enzyme. Wasted parts of the Sipahutar pineapple plant have never been processed into bromelain enzyme. This research was aimed to determine the crude extract characteristics of the Sipahutar pineapple bromelain enzyme extracted with three centrifugation speeds. The research was conducted at the Food Analysis and Biochemistry Laboratory, University of North Sumatra from January to March 2023. The research was arranged in a completely randomized factorial design. The first factor is the part of the fruit used (B), namely the skin, flesh, and core, while the second factor is the centrifugation speed (K) which consists of 3000, 4000 and 5000 rpm. The study results showed that only the part of the fruit used (B) factor that affected the test parameters, especially pH and bromelain enzyme activity. The skin produced the highest pH (4.55) and enzyme activity (0.0035 U/ml) while the flesh produced the lowest pH (4,25), enzyme activity (0.0019 U/ml), and the highest soluble protein content (0.69 Âµg/ml).

Management Strategy for Public Green Open Spaces in Medan City Using SWOT Analysis

Surya Al Fatah — 2024-09-11

Medan City, the third-largest city in Indonesia, faces significant challenges in managing its public green open spaces (RTH) due to high population density, rapid urbanization, and insufficient green space, which falls far short of the 30% mandated by law. This research assesses the management of public green spaces in Medan through a SWOT analysis, revealing internal strengths such as a Regional Spatial Plan and government commitment, alongside weaknesses like suboptimal management, lack of coordination between agencies, and inadequate regulations. External factors, including opportunities from NGO funding and potential land acquisition, contrast with threats like rapid population growth and misuse of green spaces. Through data collection methods, including focus group discussions, questionnaires, and interviews with key stakeholders, the research identified key areas for improvement in green space management. Strategic recommendations include strengthening policies, increasing public awareness, optimizing cross-sector collaboration, and promoting sustainable urban planning. Additionally, leveraging green spaces for economic growth through multifunctional uses can enhance their value to the community. This study concludes that public green open spaces in Medan City can contribute significantly to sustainable urban development and environmental balance if managed more effectively, with better coordination, stronger regulations, and resource allocation. The findings aim to provide valuable insights for urban planners and policy makers in achieving urban sustainability goals.

Strategies for Performance Optimization: Risk Mitigation in Tourism Supply Chains of Indonesia

Fandi Achmad — 2024-09-11

In the context of optimizing performance, the tourism industry has great potential as a source of income for regions and countries. One area that has great potential in the tourism industry is Rembang Regency, Central Java, Indonesia. However, this industry is also vulnerable to various risks, such as natural disasters, pandemics, and security issues. Therefore, this research aims to identify risks in the tourism industry supply chain in Rembang Regency and develop effective mitigation strategies. The research method used is decision matrix risk assessment (DMRA), which involves supply chain mapping, risk identification, risk assessment, risk response development, and risk response control. The results of identifying risks that need to be mitigated from travel agents to tourist activities include fluctuating products/services, incompatibility with tourist destinations, and failure in promotional programs. Meanwhile, stakeholder activities in the tourism industry include failure in formulating policies and promotional programs. Proposed mitigation measures include diversifying supply chains, improving communication between suppliers and the tourism industry, and developing flexible policies. Implementation of this strategy is expected to strengthen the tourism industry supply chain in Rembang Regency, improve the tourist experience, and support sustainable economic growth. Risk mitigation in the tourism industry also contributes to the performance of the tourism industry and the achievement of sustainable development goals (SDGs) by providing benefits to the environment, economy, and local communities.

Environmental Factors Associated with the Occurrence of Filariasis in Asahan Regency, North Sumatra Province

Israyani Ismili — 2024-09-11

Filariasis is a serious parasitic infection caused by thread-like worms known

as filariae. These worms are transmitted to humans through the bites of infected mosquitoes. The infection mainly affects the lymphatic system, which is part of your body's immune system. Poor sanitation and lack of proper housing infrastructure are a few aspects causing filariasis. This research aims to to determine the environmental factors related to the incidence of filariasis in Asahan Regency, North Sumatra Province Data was collected using a purposive sampling technique and involved direct observation of the research subjects. This data was analyzed using univariate and bivariate analysis to test the hypothesis and using numerous variables like temperature, humidity, conditions around the house that become mosquito habitat. This paper found that the majority of respondents with filariasis had non-permanent walls, ceilings, and no mosquito mesh in their homes. Houses with non-permanent walls or without mosquito mesh were found to have a higher risk of filariasis. Specifically, non-permanent walls increased the risk by 4.342 times, and the absence of mosquito mesh increased the risk by 4.848 times. The condition of the ceiling was not proven to be a risk factor for the occurrence of filariasis. The presence of mosquito mesh was found to be an effective preventive measure in reducing the risk of human contact with the filariasis vector mosquitoes.

Evaluating Fisheries Livelihoods: Socio-Economic Dimensions and Management Challenges

Afran Rouzani Pulungan — 2024-09-11

Fisheries management, which focuses on using fisheries resources to improve the livelihood of the fishing communities, has led to over-exploitation of fish resources on the east coast of North Sumatra. This has led to a decline in the potential of some fish species, which in turn has affected fishermen's incomes. This study aims to identify the socio-economic conditions of fishermen through the Ecosystem Approach to Fisheries Management (EAFM) and the factors that influence them. The data used are primary and secondary data, collected through observation, interviews, and literature studies. The study involved a sample of 64 fishermen from three locations along the eastern coast of Sumatra: Medan, Serdang Bedagai, and Deli Serdang. This research uses a descriptive qualitative method and the EAFM approach to analyze the social and economic conditions of fishermen in Medan, Deli Serdang, and Serdang Bedagai. The results of this study indicate that there has been a decline in the number of fishermen and the capture fisheries production at the research sites. The score of the social domain scored 55.55 (moderate), while the economic domain scored 66.67 (good) indicating effective but improvable management. The research results show that the indicators of stakeholder participation, utilization of local knowledge for fisheries management, asset ownership, and demand for fishery products are in the good category, while the indicators of fisheries conflicts and fishermen's household income are in the poor category, which needed to be the focus for improvement and enhancement.