DSpace JSPUI

The hazardous effect of the pollution of fossil fuels has brought the necessity of shifting conventional energy sources to renewable and clean ones. In this study, the effect of hydrogen addition and CeO2 nanoparticle addition in waste cooking palm biodiesel on a CRDI engine is evaluated. The dosage of the nanoparticle is fixed at 75 ppm and a hydrogen flow rate of 10 L/min is selected for the engine operations. The crystalline structure of the nanoparticles is determined by XRD analysis...

Optimum indoor air quality (IAQ) is crucial for maintaining a healthy work environment. This study examines the effects of IAQ on Sick Building Syndrome (SBS) symptoms across various economic subsectors during the monsoonal seasons in Terengganu, Malaysia. Four locations representing the education (S1), wholesale or retail trade (S2), manufacturing (S3), and services (S4) subsectors were assessed. IAQ was measured using ventilation indicators (carbon dioxide, CO2), ch...

Wind maps are required to determine wind resource over a given areas and they are an important component of wind energy exploration and exploitation. The intermittency of wind, geographical, and temporal variability, as well as the complex relationship between wind and their nature, have made accurate spatial wind speed modelling more difficult. The aim of this study was to contribute a novel and original solution to the problem of developing wind maps for wind energy exploita...

This thesis work investigated a more sustainable and environmentally friendly approach to replacing chemical-based alternatives for improving abiotic stress tolerance and preventing shrimp diseases in aquaculture. The efficacy of methanolic Pandanus tectorius leaf extract (PLE) as a natural alternative for increasing shrimp tolerance to lethal abiotic stressors (i.e., temperature at 42°C for 15 min, pH 5.3 for 24 h, and salinity at 100 g/L for 48 h), and Vibrio campbellii (10⁶ ce...

This research focused on the sustainable green synthesis of silver nanoparticles (AgNPs) using Coffea arabica husk, an agro-industrial byproduct, as a reducing and capping agent. The primary problem addressed by this study is the environmental challenges posed by agro-waste disposal and the limitations of conventional nanoparticle synthesis methods, which often involve toxic chemicals and high energy consumption. This eco-friendly approach provides an alternativ...

In the competitive environment of higher education, effective human resource management is vital for institutional sustainability and success. This study examines the mediating role of top management support in the impact of electronic Human Resource Management (e-HRM) practices on talent management (TM) within private Jordanian universities. Despite the growing adoption of e-HRM systems, research has not sufficiently explored how managerial support i...

Shipping companies in Jordan have recently faced a decline in productivity, yet the specific reasons behind this trend remain unclear. While various studies have examined productivity challenges in Jordanian companies, little research has focused on the shipping sector. This study investigates the role of training and development (TD) in enhancing productivity by examining four key dimensions: training and development needs (TDN), training and development design (TDD), ...

This study investigated the effects of levofloxacin (LEV) and norfloxacin (NOR) on Skeletonema costatum, focusing on cell growth, chlorophyll a (Chla) content, maximal quantum yield of PSII (Fv/Fm), protein content, enzyme activities of superoxide dismutase (SOD), glutathione reductase (GR), and glutathione peroxidase (GSH-PX), and the membrane lipid peroxidation product malondialdehyde (MDA) content were conducted to analyze the responses of S. costatum under LEV and NOR exposure. Cell...

Ocean warming can affect the development and physiological responses of kelps, and under future climate change scenarios, increasing seawater temperatures pose a major threat to these habitat-forming species. However, little is known about the effects of warming on epiphytic bacterial communities and how an altered microbiome may interact with temperature stress, affecting the condition and survival of kelp, particularly of the potentially more vulnerable early life stages. Here, we tes...

In order to study the effects of soybean isoflavones on the growth performance and lipid metabolism of juvenile Chinese mitten crabs, six experimental diets were formulated by gradient supplementation with 0%, 0.004% and 0.008% soybean isoflavones at different dietary lipid levels (10% and 15%). The groups were named as follows: NF-0 group (10% fat and 0% SIFs), NF-0.004 group (10% fat and 0.004% SIFs), NF-0.008 group (10% fat and 0.008% SIFs), HF-0 group (15% fat and 0% SIFs), HF-0.004 ...

This study examines the physiological response of the Atlantic surfclam (Spisula solidissima) to ocean acidification in warm summer temperatures. Working with ambient seawater, this experiment manipulated pH conditions while maintaining natural diel fluctuations and seasonal shifts in temperature. One-year-old surfclams were exposed to one of three pH conditions (ambient (control): 7.8 ± 0.07, medium: 7.51 ± 0.10, or low: 7.20 ± 0.10) in flow-through conditions for six weeks, and feeding...

Biofloc technology (BFT) culture systems based on low salinity can meet the needs of shrimp growth and environmental protection, thus having potential application. To evaluate the effects of BFT on water quality, the microbial community, growth, digestive enzyme activity, and antioxidant and immune status of Litopenaeus vannamei under low salinity conditions, a four-week experiment was conducted in a BFT culture system (C/N ratio of 12: 1) with three salinity conditions: 5.0‰ (S5 group),...

With global warming, in recent years, golden tides have frequently occurred off the coasts of China. Sargassum horneri, which attach to aquaculture rafts, can float and form small-scale golden tides after falling off. Temperature will affect the growth and reproduction of algae. In order to explore whether the temperature is the potential influence factor of the golden tide outbreak, in this study, the effects of global warming on the growth and proliferation of S. horneri in the mussel a...

Feed is the main source of material and energy for farmed fish, and its nutritional value and balance are important factors affecting fish’s growth rate and physical health. In order to explore the effects of two different feed sources on the growth, serum biochemical indexes, liver antioxidant capacity, and lipid metabolism of young cobia fish, 300 young cobia fish with an initial body weight of 43.14 1.25 g were selected for the experiment and randomly divided into two treatments. Each t...

Estuary reopening is a means of restoring estuarine habitats, which has recently been implemented in a few developed countries. The regeneration of a brackish zone in the Nakdong River Estuary (NRE), South Korea,were tested through a series of barrage reopening. During the same period, we conducted extensive fish surveys in the upper part of the NRE barrage on a monthly basis from 2017 to 2021, and subsequently determined whether fish populations and communities were affected by the reo...

This work is aimed to study the effect of turbidity on the swordtail’s body shape during its early developmental stages. For this purpose, two treatments were designed as turbid and clear water, each with three replicates for 60 days. The body shape data was extracted by digitizing 16 landmark points on 2D pictures to analysis using the geometric morphometric technique. The results showed a significant difference between the two treatments in terms of body shape. Fish under turbid condit...

The medicinal and therapeutic properties of microalgae, especially their anti-cancer properties in modulating cellular mechanisms such as cytotoxicity, reducing tumor cell invasion, and increasing apoptosis, have drawn attention to their therapeutic application in cancer. However, there are few reports on the effects of Tetraselmis suecica microalgae on liver cancer. As the aim of this study, after ethanolic extracting from T. suecica, and IC50 determination, the effect of T. suecica micr...

Agricultural strategies are urgently needed to mitigate greenhouse gas emissions without reducing crop yield. Seedling rate per hill will affect the quantity and quality of tillers, which may affect rice yield and CH4 emissions. Therefore, it is hypothesized that high yields with low yield-scaled CH4 emissions could be achieved with optimal seedling rate per hill. A field experiment was conducted with three densities (low seedling rate, LSR; moderate seedling rate,MSR; and high seedling r...

Lactic acid bacteria (LAB) produce several antibacterial compounds, including organic acids that inhibit many types of pathogenic bacteria. The antibacterial activity of LAB with the ability to inhibit growth of pathogenic bacteria associated with foodborne illness is seen as a natural way to improve food safety. This study was carried out to isolate and identify LAB from local pickled guava (Psidium guajava) and papaya (Carica papaya) and to evaluate their antibacterial activity against...