Digital Commons Network^™

Investigating The Incorporation Of Milled Rice In Brewing Non-Alcoholic Beer To Enhance Sensory Quality, Christian Schubert, Rahul Sen, Nils Rettberg, Scott Lafontaine

Food Science Faculty Publications and Presentations

The influence of substituting barley malt with milled rice on the sensory and chemical characteristics of nonalcoholic beers (NAB) was investigated. Physicochemical and volatile analyses were conducted on the NABs. Original gravities ranged from 6.71% w/w (100% barley malt) to 7.15% w/w (100% rice), with alcohol contents between 0.33% v/v (70% barley/30 %rice) and 0.45 % v/v (100% rice). Color decreased from 10.8 EBC (100% barley malt) to 3.3 EBC (100% rice). Descriptive analysis sensory evaluations by trained panelists in the United States and European Union were used to characterize the sensory profiles of the NABs. Principal component analysis showed …

Eata Mediated Degradation Of Intestinal Mucus Is Species-Specific And Driven By Muc2 Structural Features, Sergio Trillo-Muyo, Brendan Dolan, Frida Svensson, Tim J Vickers, Liisa Arike, Maria-Jose García-Bonete, Jenny K Gustafsson, Mathias I Nielsen, Hans H Wandall, James M Fleckenstein, Gunnar C Hansson, Sjoerd Van Der Post

2020-Current year OA Pubs

Enterotoxigenic Escherichia coli (ETEC) infections are a leading cause of diarrheal illness, responsible for an estimated 100,000 deaths annually. ETEC pathogenesis is driven by various virulence factors, including toxins, adhesins, and noncanonical factors such as the protease EatA. The first line of host defense against intestinal pathogenic bacterial infections is the protective intestinal mucus layer. Here, we demonstrate the mechanism by which EatA degrades the core mucus component MUC2, thereby facilitating access to the epithelial cell surface and promoting infection. We identify the specific cleavage site region localized at the C-terminal of MUC2. EatA's protease activity depends on the interaction …

Penerapan Design Thinking Dalam Merancang Media Pembelajaran Pada Mata Pelajaran Ipas Kelas Iii Sekolah Dasar, Dina Lestari, Khikmah Mijil Pawestri, Lina Yekti Oktiningtiyas, Rizky Yuliana Pratista, Tia Sulistiani

Journal of Innovation and Teacher Professionalism

Observations of third-grade students at SD Negeri Gedongtengen were conducted using in-depth interviews within a Design Thinking approach to explore their fears, difficulties, and concerns about learning. The findings indicated that several factors influenced their learning process. Interviews were conducted with two high-achieving and two lower-achieving students. The results showed that learning outcomes were affected not only by internal factors but also by external factors such as learning methods, instructional media, and learning styles. Students experienced difficulty understanding unfamiliar terms in Natural and Social Sciences, particularly in the topic of animal life cycles. Therefore, an engaging and useful learning medium …

Post–Tooth Extraction Supportive Therapy With Limosilactobacillus Reuteri Probiotic And Hyaluronic Acid Gel Combination On Collagen Density, Desak Mh. Wijayanti, Armelia S. Widyarman, Melanie H. Sadono, Firstine K. Hartanto, Komariah, Wiwiek Poedjiastuti

Journal of Dentomaxillofacial Science

Objective: Tooth extraction is a common medical procedure that can be classified classified as simple or complex, depending on the condition of the tooth. Supportive therapies are being explored to  accelerate wound healing after tooth extraction. Hyaluronic Acid (HA) and Limosilactobacillus reuteri (L. reuteri) are known to have positive effects on overall body and oral health. This study aimed to analyze the differences in collagen density during wound healing process after tooth extraction with the administration of supportive therapy by combining HA and probiotic L. reuteri in Wistar rats (Rattus norvegicus).

Material and Methods: Collagen density …

Combined Effects Of Physical Activity And Uv-B Light On Bdnf In Brain And Oral Function: A Wistar Rat Model Study, Zahreni Hamzah, Tantin Ermawati, I-Dar. Dewanti, Sari Setyaningsih, Yohana M. Penga, Julia Yp. Ariyo

Journal of Dentomaxillofacial Science

Objective: To evaluate the combination effects of physical activity (structured training) and UV-B exposure on serum brain-derived neurotrophic factor (BDNF) levels and assess their association with oral health and cognitive function.
Materials and methods: This study utilized male Wistar rats (3-4 months old, average body weight 250-350 g). The rats were divided into three groups: (K) control group and (P) exercise groups with or without ultraviolet B (UV-B) exposure. The exercise-treated groups underwent treadmill running for 30 minutes per session, divided into three sessions. Following the intervention, the rats were euthanized, and intracardiac blood samples (5 mL serum per rat) …

Quality Evaluation Of Ecological Experience Resources And Optimization Of Resource Management Policies In National Parks: Taking The Laohegou Area Of Giant Panda National Park As An Example, Baorong Huang

Double Helix Methodology

National parks are the core carriers for implementing the concept of “ecological protection first, public welfare for all”. This study used the fuzzy comprehensive evaluation method to evaluate the ecological experience resource quality of the Laohegou area in Giant Panda National Park of China. Based on the standardized psychological assessment scale and the Kessler Psychological Distress Scale, we have established an evaluation model for the psychological health benefits, quantifying the psychological health benefits of tourists in the ecological experience of national parks. At the same time, the relationship between the demographic characteristics, ecological experience characteristics, psychological health level, and psychological …

Economic Resilience As A Mediator: Assessing The Impact Of China’S Grazing Withdrawal Project On Herders’ Well-Being In The Yellow River Source Region, Lihua Zhou

Double Helix Methodology

Investigating how China’s most extensive grassland conservation program, the Grazing Withdrawal Project, impacts herders’ resilience and welfare levels is crucial for promoting sustainable grassland protection and enabling herders to withstand external shocks. However, few empirical studies have linked policy measures, economic resilience, and subjective well-being. Based on 266 questionnaires from the Yellow River Source Region, we constructed an indicator system for evaluating economic resilience and employed multiple linear regression to explore the key variables affecting herders’ economic resilience and subjective well-being under the context of the project and to clarify the mediating effect of resilience in translating government interventions into …

Foodways And Community: Shellfish Consumption At Sitio Drago In Bocas Del Toro, Panamá, Megan E. Winnick

Graduate Masters Theses

Food-related practices provide marginalized groups with spaces for cultural exchange and asserting agency within colonial contexts, often leading to the formation of new communities and identities. Marine mollusks, due to their widespread accessibility, have a significant role in the cuisines of African Diaspora and Indigenous communities in Latin America. This thesis examines shellfish consumption at Sitio Drago in Bocas del Toro, Panamá, highlighting how shellfish harvesting and communal cooking fostered community expression through local food sources. The study includes analyses of spatial distribution of mollusk species, MNI counts across three temporal periods, and a size distribution of common gastropods. Findings …

The Imaginary In Architecture: The Conceptual Structure Of The Imaginary And Its Manifestations In Architectural Text, Noora Ghadir Hlail, Abbas Ali Hamza Al Greiza

Al-Esraa University College Journal for Engineering Sciences

This study explores the concept of the imaginary as a collective cognitive and cultural structure that shapes symbolic reality through images, myths, and deeply rooted symbols in collective memory. The research applies this concept within the field of architecture, aiming to understand how the imaginary is embodied in architectural texts as symbolic carriers of identity and cultural meaning. Adopting a descriptive-analytical methodology, the study develops a theoretical framework comprising key components—preconditions, mechanisms, and traits of the imaginary—and applies it to two selected case studies: the General Secretariat of the Iraqi Council of Ministers and the Louvre Abu Dhabi Museum. The …

Optimal Control Of Stochastic Systems: A Numerical Study Of The Stochastic Linear Quadratic Regulator Framework, Gülşen Orucova Büyüköz, Yaprak Güldoğan Dericioğlu, Tuğçem Partal

Mathematical Modelling and Numerical Simulation with Applications

Optimal control of stochastic linear systems is fundamental in control theory, with applications in robotics, finance, and engineering. The Stochastic Linear Quadratic Regulator (SLQR) derives optimal feedback laws via the Riccati equation but requires numerical discretization of the resulting stochastic dynamics. Despite extensive studies on numerical methods for stochastic differential equations, their performance within the SLQR framework remains insufficiently explored. This study compares two predictor–corrector schemes of different orders: the Order 1.0 Predictor-Corrector (PC) method and the Order 2.0 Weak PC method. A one-dimensional linear quadratic problem with a closed-form solution enables precise error evaluation against the analytical trajectory. Convergence …

Analysis And Numerical Investigation Of A Breast Cancer Treatment Model Incorporating Ketogenic Diet And Immune Boosters Via Optimal Control Theory, Kunnisai Muniroh, Ummu Habibah, Wuryansari Muharini Kusumawinahyu, Nur’Izzati Hamdan

Mathematical Modelling and Numerical Simulation with Applications

This paper develops a mathematical model to investigate breast cancer dynamics by incorporating tumor–immune interactions, ketogenic diet effects, and medical treatment. The model is formulated as a system of nonlinear ordinary differential equations and analyzed within an optimal control framework. Time-dependent control variables are introduced to represent treatment strategies aimed at minimizing tumor progression while reducing therapeutic costs. The model’s well-posedness is established through positivity and boundedness analysis. The necessary conditions for optimality are derived using Pontryagin’s Minimum Principle, resulting in a coupled system of state and adjoint equations. Numerical solutions are obtained using the fourth-order Runge–Kutta method combined with …

Is Uganda’S Trade Complementary With Its Eac Partners?, Aaron Ecel, Timothy Esemu, Matthias S. Mulumba, Jimmy O. Otim

Tanzanian Economic Review

This study evaluates the extent to which Uganda’s export profile aligns with the import needs of its East African Community partner states, with the aim of identifying opportunities for enhanced regional trade. Using sectoral trade data from the International Trade Centre and UN Comtrade, the study applies the Trade Complementarity Index (TCI) and Trade Intensity Index (TII) to analyze Uganda’s trade flows with EAC partners between 2013 and 2023. The results show that Uganda’s trade complementarity with EAC partners remains generally low across several key sectors, including prepared foodstuffs and chemicals, despite significant regional demand and preferential market access. Trade …

Adapting To Aridity: Crop Production Trends Among Smallholder Farmers In Iramba District, Tanzania, Nashokigwa Shalua, Digna Wolfram Mlengule, Johnstone M. Andrea

Tanzanian Economic Review

Increasing crop production amid recurrent droughts remains a critical challenge for smallholder farmers in the semi-arid Iramba District; however, empirical evidence on crop production remains scarce. This paper analysed trends in crop production in Iramba District from 1995 to 2024. Mixed methods were used, and data were collected through structured interviews, focus group discussions, field observations, in-depth interviews and document reviews. Quantitative data were analysed using descriptive statistics while qualitative data were thematically analysed. The results indicate that 84.2% (n=95) of the households showed an increase in crop yields despite concurrent severe drought. Sunflower, maize, bulrush millet, and sorghum were …

Effects Of Foam Type And Thickness On Impact Resistance, Thermal Insulation, And Cost-Effectiveness Of Medical Containers For Drone Delivery, Josh Henry C. Soriano, Eriel V. Fonte, Lambertsus S. Novera, Nicolai Paolo B. Villarin, Joel B. Jalon, Jr.

Sinaya: A Philippine Journal for Senior High School Teachers and Students

Accessible healthcare remains a challenge for rural communities lacking reliable infrastructure for medical supply delivery. Delivery drones have recently emerged as a viable alternative, dropping medical containers during flight. However, the effectiveness of different foam types and thicknesses combined with corrugated cardboard as shock-absorbing materials in a medical container for delivery drones has yet to be tested. Thus, this study designed cost-effective containers using corrugated cardboard and multiple foam types and thicknesses, aiming to preserve the integrity of the contents, withstand impact, and control temperatures. Four foam types—polystyrene, polyurethane, polyethylene, and expanded polystyrene (EPS) —were tested at 1 cm, 2 …

Baseline Assessment Of Insect Biodiversity And Distribution In La Salle Botanical Gardens, Pampanga, Philippines, Amir Lyndon Gavriell C. Beup, Kaleela Euan G. Jayson, Alyssa Ira Z. Tan, Ronielle Elisha S. Pascual, Alexi Gabrielle S. Henson, Esperidion Josef P. Ladao Iii, Juan Carlo T. Gumangan

Sinaya: A Philippine Journal for Senior High School Teachers and Students

Insects are crucial for ecosystem functions, such as pollination and food web maintenance. This study aims to assess insect biodiversity in La Salle Botanical Gardens (LSBG) in Porac, Pampanga, focusing on its grassland and forestland areas. Using rapid biodiversity assessment, this study provides baseline data on insect diversity, abundance, dominance, and evenness for conservation. Sampling employed transect line intercept and quadrat methods. Specimens were collected using different collection and preservation techniques. Insects (n = 184) were collected from August to October 2024, with specimens (n = 46) belonging to seven insect orders in the grassland and specimens (n = 138) …

Comparing Individual Vs Mixed Treatments Of Chicken Bone Meal And Crab Shell Meal On The Growth Of Capsicum Annuum (Bell Pepper), Allthur Rudy R. Arroyo, John Rafael V. Capinia, Ethan Jude R. Reyes, Elnathan Jethro B. Sumalbag, Karl Benedict E. Viri, John Ray Cordova Estrellado, Kerry P. Cabral

Sinaya: A Philippine Journal for Senior High School Teachers and Students

The recycling of nutrient-rich food waste reduces reliance on synthetic fertilizers, enhances soil quality, and improves plant growth. Existing studies have demonstrated the effectiveness of food waste, such as bone meal (B) and crab shell meal (S), as fertilizers; however, their combined use has not been investigated. This study aims to evaluate the effect of varying proportions of B and S fertilizers on the growth of Capsicum annuum (bell pepper) employing a random complete block design with 10 treatments (pure B, pure S, and a 50:50 BS mix, each at 7 g, 14 g, and 21 g) plus a control …

Experiences Of Bukidnon Farmers On The Use Of Carbonized Rice Hulls (Crh) Waste From Biomass Boilers As A Soil Conditioner, Dash Constantine S. Chamen, Queen Loraine D. Ban, Michael Justin O. Eluna, Pole Honson B. Gabitano, Ian Jay P. Saldo, Jhovel Roy D. Calo

Sinaya: A Philippine Journal for Senior High School Teachers and Students

The long-term use of agricultural products that adversely affect soil is a significant issue for farmers. This study explored the potential of carbonized rice hulls (CRH) waste from biomass boilers as a sustainable soil conditioner. The research investigated the specific soil conditioning properties of CRH and explored the lived experiences of nine (9) Bukidnon farmers to correlate their observations with the material’s chemical profile. The composition analysis identified a high silica content and essential micronutrients, such as calcium and magnesium, which act as nutrient restorers and pH regulators. The thematic analysis of semi-structured interviews, four themes emerged to summarize the …

“Maria! Balbon Mo, Ahitin Mo!”: Ang Karanasan Ng Mga Pilipina Sa Pagtanggal Ng Buhok Sa Katawan Bilang Isang Beauty Standard, Zakiya Clarisse Y. Carabuena, Julianne Krystoff B. De Leon, Rebecca W. Dionisio, Alliah Kristy A. Sato, Deborrah S. Anastacio

Sinaya: A Philippine Journal for Senior High School Teachers and Students

Ang pagtanggal ng buhok sa katawan ng mga kababaihan ay naging isang pamantayan ng kagandahan na may malalim na ugnayan sa mga impluwensyang panlipunan at pangkulturang aspeto. Ang layunin ng pag-aaral na ito ay tuklasin kung bakit at paano nagpapatanggal ng buhok sa katawan ang mga kababaihan sa Pilipinas, pati na rin ang impluwensya ng mga pamantayang ito sa kanilang desisyon at karanasan. Gumamit ang pananaliksik na ito ng kwalitatibong metodolohiya, partikular na ang purposive sampling, upang makapanayam ang pitong (7) kababaihan na nasa edad 18-25 at mayroon nang karanasan sa pagtanggal ng buhok sa katawan. Ang mga panayam …

To Us For Every Decision We Make: A Deleuzian And Guattarian Criticism Of The Films "To Me The One Who Loved You And To Every You I'Ve Loved Before", Elstenn Nicholas Misa, Chino Samuel C. Sta. Ana, Ayed Anthony N. Velasco, Nathaniel Rey D. Ferrer

Sinaya: A Philippine Journal for Senior High School Teachers and Students

Anime has emerged not only as a form of entertainment but also as a cultural and philosophical medium exploring concepts such as identity, decision-making, and existential dilemmas. Despite its growing influence in both global and Filipino contexts, little scholarly attention has been given to how philosophical frameworks like Deleuze and Guattari’s can be applied to analyze such narratives. The study analyzed To Every You I’ve Loved Before (2022) and To Me The One Who Loved You (2022) while applying Deleuze and Guattari’s philosophical approach to understand how decisions, with identity formation and social norms, affect character development. The research applies …

A Visual Analysis Of Sogie-Themed Children’S Storybooks From Mulat Sulat, Audrey Leigh T. De Leon, Cassandra Louise A. Ma, Jennifer Shan E. Ou, Belle Beatriex' M. Alemania

Sinaya: A Philippine Journal for Senior High School Teachers and Students

Children’s storybooks play a crucial role in the significance of sexual orientation, gender identity, and expression (SOGIE) and the realities of gender-based representation. Although previous literature has analyzed books through textual analysis, there remains a gap in the visual analysis of SOGIE-themed Filipino children’s books. Therefore, this study focuses on the visual representation of characters in five storybooks published under the Mulat Sulat project in 2018. This research employed the first three levels of Rodriguez and Dimitrova’s (2011) visual framing framework to analyze how illustrations are depicted through various visual elements. Additionally, this study utilized Bisht’s (2020) coding template to …

Ang Mga Tinig Sa Herbal Lane Tungo Sa Paglalang Ng Quiapook: Pagbalangkas Sa Karanasan Ng Herbal Medicine Vendors Sa Quiapo, Maynila, Lorraine Antonette A. Bonifacio, Jamie Kelly S. Izon, Stephanie Lois E. Prats, Ma. Jayanne C. Mapugay

Sinaya: A Philippine Journal for Senior High School Teachers and Students

Nananatiling limitado ang sistematikong pag-aaral tungkol sa herbal medicine vendors sa modernong panahon bagaman nananahan na ang mahabang kasaysayan ng tradisyonal na panggagamot sa bansa. Sa Quiapo, madidinig ang taal na mga karanasan ng vendors na matagal nang bumubuhay sa herbal lane ng lugar. Upang maumpisahan ang pagbabalangkas sa mga natatanging karanasang ito, sumanding ang pag-aaral sa deskriptibong penomenolohiya, alinsunod sa Collaizzi’s Method at konseptong Quiapook, na kumikilala sa sistematikong pagpopook ng mga danas sa Quiapo. Gamit ang semi-structured interview sa limang piling vendors, sumuong sa proseso ng pagbaklas (bracketing), pagiging bukas (intuition), pagsusuri (investigate), at paglantad (descriptive) ang pag-aaral. …

Assessment Of Serum Levels Of Na, K, Mg, Fe+2, And Se As Potential Risk Markers In Women With Breast Cancer, Fatima Hussein Mahdi, Muthana Saleh Mashkour, Seyed Omid Ranaei Siadat, Hanaa Addai Ali, Abdulkadhim A. Hawi

Hilla University College Journal For Medical Science

Background: Breast cancer is a malignant neoplasm characterized by uncontrolled proliferation of breast epithelial cells, with potential for metastasis.

Objectives: To follow the change in the level of trace elements (TEs) and the extent to which these changes are related to the risk of breast cancer before taking chemotherapy or removing the tumor.

Materials and Methods: The case-control group had 90 Iraqi women with newly diagnosed breast cancer, alongside 90 healthy women who were matched for age and body mass index. Elements and electrolytes in the serum, such as iron, sodium, potassium, magnesium, and selenium, were measured using a spectrophotometer. …

Factors Contributing To Intestinal Parasitic Infestations In Children Attending Primary Private And Public Schools In Central Benghazi, Asmaa A. Alfarisi, Samira S. Garboui, Fawzeia H. Elmhalli, Maha A. Kattou, Suhaila Elabbar, Hajir A. Alabede, Zahrah A. Alawami

Journal of King Abdulaziz University: Medical Sciences

Background: Intestinal parasitic infections (IPIs) among school-aged children are a significant public health issue in many parts of the world, with high prevalence rates in many regions. The study aims to investigate the prevalence and associated risk factors of IPIs among school children.

Materials and Methods: A cross-sectional study was conducted among randomly selected primary school children aged 6 to 9 years in central Benghazi from April to September 2021. Stool samples were collected from 700 schoolchildren and analyzed using the wet-mount technique. Also, questionnaires were distributed, and general information on each child was recorded.

Results: The study revealed a …

Anti-Cancer Effects Of Chicken Cathelicidin Peptides On Breast, Colon, And Liver Carcinoma Cells, Maryam M. Hamed, Mohammed Alkhaled, Yousef Almoghrabi, Aliaa A. Alamoudi, Hussam Daghistani, Abdulwahab Noorwali

Journal of King Abdulaziz University: Medical Sciences

Cancer remains a threat to human life, affecting millions of people. Limitations associated with conventional tumor therapies motivate the search for new, effective, and non-toxic therapies. Cathelicidin peptide (CATH) is a host defense peptide with anti-microbial and immunomodulatory activity. Moreover, cumulative studies have revealed its anti-cancer properties. While several studies have explored their antimicrobial and anti-tumor potential, further research is needed to elucidate their specific mechanisms across different tumor types. Our study aimed to investigate the anti-cancer effects of two types of Chicken CATH, 1 and 2, on breast MCF-7, colon HCT-116, and liver HEPG-2 carcinoma cells, and to examine …

From Companionship To Grief: Lived Experiences Of Adolescent Dog Owners At De La Salle University, Dave Edrich Lao, Oel Bes, Zachariah Moscardon, Renzy Sabandal, Noel Bedia

Sinaya: A Philippine Journal for Senior High School Teachers and Students

Pets have long been part of people’s lives, but today, they are often viewed as family, especially by adolescents who rely on them for comfort, support, and companionship. For many, the bond with a pet runs deep, making their loss emotionally devastating. However, the emotional and psychological impact of this grief, particularly among adolescents, remains largely overlooked in academic research despite growing recognition of the human-animal bond. This phenomenological study explores the lived experiences of seven adolescent dog owners (ages 18–23) from De La Salle University Manila, focusing on understanding how they form attachments to pets, navigate caregiving responsibilities, and …

Potencies Of Topical Corticosteroids Available In Saudi Arabia, Amal A. Kokandi

Journal of King Abdulaziz University: Medical Sciences

Background: Topical corticosteroids (TCs) are used extensively for different skin disorders. They differ in potency, which is measured by different methods. This study aimed to examine the potencies of all TCs registered with the Saudi FDA. Methods: All Saudi FDA-registered TCs were matched to the US classification (7 categories), the Cochrane classification (4 categories), and the ATC 4-category classification (4 categories), if available.Results: A total of 116 products were identified, containing 16 known TCs. All products were classified to the best of our knowledge. There were a few uncertainties about the classification of some TCs.Conclusions: There is a …

Strongyloides Stercoralis Infection In Humans, Shaymaa A. Abdalal

Journal of King Abdulaziz University: Medical Sciences

Strongyloides stercoralis (S. stercoralis), commonly known as the threadworm, is a soil-transmitted helminth that infects humans and causes strongyloidiasis. Despite being a significant public health concern, it remains one of the most neglected tropical diseases. The infection is prevalent worldwide, except in Antarctica, and often results in asymptomatic chronic gut infections that can persist for decades. However, in immunocompromised individuals, particularly those on long-term corticosteroid therapy, hyperinfection syndrome can occur, leading to mortality rates as high as 87%. Challenges in managing strongyloidiasis include its wide range of clinical presentations, the lack of highly sensitive diagnostic tests, and the potential for …

Lead Bioremoval By Halotolerant Bacteria Isolated From Mangrove Rhizosphere Soils Of Saudi Arabia, Reda H. Amasha, Rawan A. Alhazzani

Journal of King Abdulaziz University: Marine Science

Bioremediation of hypersaline environments contaminated with heavy metals is challenging due to high salinity levels, particularly when using conventional microorganisms. This study aimed to isolate and identify halotolerant and halophilic bacteria from various mangrove rhizosphere soil samples in Saudi Arabia and to evaluate their ability to remove heavy metals under high-salinity conditions. Out of 27 isolated strains, LD57 and LR40 demonstrated the highest resistance to lead ions. Both isolates grew well at 37 °C in the presence of 3 M NaCl and recorded growth at varying concentrations of lead nitrate, ranging from 100 to 4500 ppm. The lead’s minimum inhibitory …

Molecular Docking And Antibacterial Activity Of Sesterterpenoids From Hyrtios Erectus, Hajer S. Alorfi, Nawal A. Albalawi

Journal of King Abdulaziz University: Marine Science

The search for new antibiotics remains urgent due to the continuous evolution of microbes and their resistance to currently available antibiotics. The organic extract of a specimen of the Red Sea sponge Hyrtios erectus collected off Jeddah coast was subjected to sequential chromatographic fractionation. Three sesterterpenoids (1–3) along with an indole alkaloid (4) were isolated from H. erectus. Structure elucidation of the isolated was accomplished using NMR, UV, and IR spectroscopy along with MS spectrometry. The antibacterial activity of the isolated sesterterpenoids (1–3) was assessed against a set of Gram-positive and negative …

Assessment Of Microplastic Pollution In Economically Significant Fish Species From Libya’S Northeastern Mediterranean Coast, Mousa Kateesh, Tarek A. Temraz, Rafat Afifi Khattab

Journal of King Abdulaziz University: Marine Science

Microplastic pollution in marine ecosystems has become a pressing global environmental issue. However, there is limited information on the distribution of microplastics in Libyan territorial waters. This study investigates plastic waste pollution in five commercially important fish species from various marine habitats along the eastern Libyan coast (Ain El-Ghazala, Sousa, Ras Hilal, Alhaniyah, and Alhamama). A total of 75 fish specimens were collected, comprising 15 individuals from each species. The findings revealed that 38% of the sampled fish had ingested plastic debris, with microplastics being the predominant form. The Sousa region exhibited the highest contamination rate (54.46%), while Alhaniyah had …