Digital Commons Network^™

Effect Of Humic Acid On Oxidative Stress And Neuroprotection In Traumatic Spinal Cord Injury: An Experimental Study, Burak Kinali, Nail Özdemi̇r, Ali Karadağ, Özge Kaya Korkmaz, Ayşe Gülden Di̇ni̇z, Fatma Demet Arslan

Turkish Journal of Medical Sciences

Traumatic spinal cord injury (TSCI) is an important health problem, especially in developing countries withadditional socioeconomic loss. Humic acid (HA) usually has antioxidant, antiinflammatory, blood circulating, and antiviral effects.Hence, it was aimed herein to show the effect of HA on neuroprotection in a TSCI model.Materials and method: A TSCI model was used, in which 24 Wistar albino rats were divided into 4 groups: control group: subjectedto only laminectomy; sham group: subjected to laminectomy + TSCI; HA 5 mg/kg group: subjected to laminectomy + TSCI +intraperitoneal (IP) injection of 5 mg/kg of HA; and HA 10 mg/kg group: subjected to laminectomy …

Tracking The Footsteps Of Burkholderia Mallei: Determination Of The Molecular Differences And Potential Resistance Genes, Dilek Dülger, Seda Eki̇ci̇, Mehmet Demi̇rci̇, Akın Yi̇ği̇n, Orkun Babacan

Turkish Journal of Medical Sciences

Chemical biological radiological nuclear threats are at an important point in the agenda of world health today, as theycan cause mass deaths. B. mallei attracts attention as a potential biological warfare agent due to its features such as multidrug resistance,a rapid transmission mechanism via aerosol, the absence of a complete treatment protocol for the infection it causes, and the absence ofan approved vaccine for protection against the bacteria. B. mallei suspect samples must be studied by experienced personnel in biosafetylevel III laboratories. B mallei is a difficult and troublesome pathogen to diagnose and many unknowns about B. mallei today. Therefore,the …

The Potential Mechanism Of Treating Ic/Bps With Hyperbaric Oxygen By Reducing Vascular Endothelial Growth Inhibitor And Hypoxia-Inducible Factor-1Α, Jing Zhang, Jiarui Kang, Liyang Wu

Turkish Journal of Medical Sciences

To investigate the roles of vascular endothelial growth inhibitor (VEGI) and hypoxia-inducible factor-1α (HIF-1α) in the treatment of refractory interstitial cystitis/bladder pain syndrome (IC/BPS) with hyperbaric oxygen (HBO).Materials and methods: A total of 38 patients were included. They were assessed before and 6 months after HBO treatment. Three- day voiding diaries were recorded, and O’leary-Sant scores, visual analog scale (VAS) scores, quality of life (QoL) scores, pelvic pain, and urgency/frequency (PUF) scores were evaluated. Bladder capacity was assessed by cystoscopy. Bladder mucosa was collected for Western blot, qRT-PCR, and immunofluorescence staining to compare the expression of VEGI and HIF-1α before …

Clinical Characteristics And Disease Course Before And After Sars-Cov-2 Infection In A Large Cohort Of Systemic Sclerosis Patients, Aslıhan Avanoğlu Güler, Büşra Özçi̇men, Mesude Seda Aydoğdu, Alper Sari, Aliyeva Numune, Nazife Tüzün Ersan, Seda Çolak, Hazan Karadeni̇z, İbrahim Vasi̇, Hamit Küçük, Yasemin Yalçinkaya, Abdulsamet Erden, Mehmet Kayaalp, Mehmet Akif Öztürk, Berna Göker, Ahmet Omma, Sedat Yilmaz, Süleyman Serdar Koca, Murat İnanç, Ali Akdoğan, Abdurrahman Tufan

Turkish Journal of Medical Sciences

The objective of this study is to evaluate the clinical presentations and adverse outcomes of Coronavirus Disease 2019 (COVID-19) in patients with systemic sclerosis (SSc) and assess the impact of SSc features on the clinical course of COVID-19.Materials and methods: In this multicenter, retrospective study, SSc patients with COVID-19 were included. Clinical features of SSc, along with detailed COVID-19 data, were extracted from medical records and patient interviews.Results: The study included 112 patients (mean age 51.4 ± 12.8 years; 90.2% female). SSc-associated interstitial lung disease (ILD) was evident in 57.1% of the patients. The findings revealed hospitalization in 25.5%, respiratory …

A Retrospective Study On The Clinical And Molecular Outcomes Of Calpainopathy In A Turkish Patient Cohort, İzem Olcay Şahi̇n, Emine Karataş, Mikail Demi̇r, Büşra Tan, Hüseyin Per, Yusuf Özkul, Munis Dündar

Turkish Journal of Medical Sciences

Calpainopathy, also known as limb-girdle muscular dystrophy recessive type 1, is a progressive muscle disorder that impacts the muscles around the hips and shoulders. The disease is caused by defects in the CAPN3 gene and can be inherited in both recessive and dominant forms. In this retrospective study, we aimed to evaluate the clinical and molecular results of our patients with calpainopathy and to examine the CAPN3 variants in Turkish and global populations.Materials and methods: Molecular analyses were performed using the next-generation sequencing (NGS) method. CAPN3 variants were identified through the examination of various databases.Results: In this retrospective study, the …

Rehabilitation Therapy Versus Drug-Only Therapy In Patients With Multiple Sclerosis, Florin Mihai Marcu, Doriana Ciobanu, Ioan Cosmin Boca, Elena Sirbu, Paul Alexandru Deme, Nicolae Catalin Hreniuc, Dorina Ianc

Turkish Journal of Medical Sciences

The treatment for multiple sclerosis (MS) does not cure the disease, but it is intended to reduce the intensity, duration, and frequency of symptoms. Rehabilitation therapy (RT), including an individualized physical therapy program (PTP) and adapted occupational therapy (OT), has benefits in terms of aerobic capacity, muscle strength, coordination, and ability to perform activities of daily living (ADL). The primary objective of this study was to examine the efficacy of RT comprising PTP, OT, and drug treatment (DT) versus DT alone in patients with MS. Another objective was to highlight the importance of continuing the PT and OT at home, …

The Effects Of On-Pump And Off-Pump Coronary Artery Bypass Surgery On Oxidative Stress And Cerebral Oxygenation: A Prospective Observational Study, Ökkeş Hakan Mi̇ni̇ksar, Sameh Alagha, Ferit Çi̇çekçi̇oğlu, Mehtap Honca, Ayşe Yeşim Göçmen

Turkish Journal of Medical Sciences

In this prospective observational study, our goal was to investigate the relationship between serum levels of oxidative stress (OS) parameters and regional cerebral oxygen saturation (rSO2) in addition to evaluating postoperative clinical outcomes among patients undergoing coronary artery bypass graft surgery (CABG).Materials and methods: This study comprised 64 adult patients undergoing elective CABG (on-pump [n = 48] and off-pump [n = 16]) procedures. Serum OS levels and rSO2 values were measured intraoperatively at three specific time points: T1 (after induction), T2 (15 min before aortic cross-clamp removal or the final distal anastomosis), and T3 (15 min after aortic cross-clamp removal …

Diurnal Rhythm Of Urinary Aquaporin-2 In Children With Primary Monosymptomatic Nocturnal Enuresis, Nehal Abdelhamid, Mohamed A. Abd Almawla, Aliaa A. Wahby, Mervat Ismail, Hani Abdelsalam Elmikaty, Hanan M. Hamed, Ingy Ashmawy, Bataul Mohamed Abdelraoaf, Enas Mokhtar Abdelhamid, Hassan M. Salam

Turkish Journal of Medical Sciences

Nocturnal enuresis can be frustrating for children and their families as the child ages. Our aim is to evaluate urine aquaporin 2 (AQP-2) as a noninvasive biomarker of water balance in children with primary monosymptomatic nocturnal enuresis (PMNE).Material and methods: The study included 90 children; sixty-eight children suffering from PMNE aged (9.57 ± 2.16) years and 22 healthy children with good toilet control, matched sex and age. All enuretic children were subjected to complete history taking, clinical evaluation, and bed wetting diary. Serum arginine vasopressin (AVP) and urine AQP-2 were tested in the morning (at 9–11 am) and evening (at …

Acute Responses Of Strength-Related Gene Expressions To Maximum Strength And Force Sense Acuity, Muammer Altun, Erdal Balcan, Sevinç Batir, Mehmet Hilmi Gökmen, Şule Özgüneş, Zübeyde Öztel

Turkish Journal of Medical Sciences

Although high muscle strength worsens the sense of force, it is unknown whether there is a relationship betweenthis deterioration and the underlying molecular mechanisms. This study examined the relationship between decreased force sense (FS)acuity and strength-related gene expressions.Materials and methods: Maximal voluntary isometric contraction (MVIC) and FS (50% MVIC) tests were performed on the kneejoints of twenty-two subjects. The expression analyses were evaluated by qRT-PCR in blood samples taken before, after MVIC, after 50%MVIC, and 15 min after the test.Results: MVIC and FS error values were significantly correlated with each other (r = .659, p = .001). The qRT-PCR analyses …

Molecular Characterization Of Fecundity-Related Gene Regions In Some Of Türkiye’S Native Sheep Breeds, Ramazan Aymaz, Fulya Özdi̇l, Yalçın Yaman

Turkish Journal of Veterinary & Animal Sciences

In this study, the BMP15 and GDF9 gene regions were examined through DNA sequencing in some native sheep breeds of Türkiye (Kıvırcık, Karacabey Merino, Chios, Gökçeada, Çine Çaparı, Awassi, and Karakacan). In the BMP15 exon 2 region, two single nucleotide polymorphisms (SNPs) were identified: one synonymous SNP, P248P (proline/proline), and one nonsynonymous SNP, L251P (leucine/proline), resulting in a missense mutation. In the GDF9 exon 1 region, only a nonsynonymous SNP, R87H (histidine/ arginine), was found. In the GDF9 exon 2 region, four SNPs were identified: two nonsynonymous SNPs, E241K (glutamate/lysine) and V332I (valine/isoleucine), and two synonymous SNPs, L159L (leucine/leucine) and …

Evaluation Of Accompanying Allergic Disease In Children With Proven Drug Allergies, Şule Büyük Yaytokgi̇l, Kezban İpek Demi̇r, Özge Yılmaz Topal, Azize Pınar Metbulut, İlknur Külhaş Çeli̇k, Müge Toyran, Ersoy Ci̇velek, Emine Di̇bek Misirlioğlu

Turkish Journal of Medical Sciences

Data on the prevalence of allergic diseases in children with proven drug allergies are limited. We aim to evaluate thefrequency of allergic comorbidity in children with proven common drug allergies.Materials and methods: Children with drug hypersensitivity confirmed by diagnostic allergy tests at our center between January 2010and December 2020 were screened retrospectively. Patients with the most common drug allergies (due to antibiotics, nonsteroidalantiinflammatory drugs [NSAIDs], and antiepileptic drugs) were selected for analysis. Age, sex, the culprit drug, initial reactioncharacteristics, diagnostic test results, and the study physician who diagnosed concomitant allergic diseases were noted.Results: A total of 168 patients (boys, 51.2%) …

Minipuberty Period Of Children With Atopic Dermatitis Compared To Healthy Children, Serkan Bilge Koca, Hatice Eke Güngör, Murat Cansever

Turkish Journal of Medical Sciences

Atopic dermatitis (AD) is an inflammatory, pruritic, noncontagious, chronic relapsing skin disease. Skin barrierabnormalities, excessive T helper 2 activity, and immune dysregulation are held responsible. Androgens have a negative effect on theintegrity of the epidermal skin barrier, while estrogen has a positive effect. We aimed to investigate whether hormones make a differencebetween healthy children and children with AD during minipuberty.Materials and methods: A total of 96 infants (postnatal 4–13 weeks), 48 diagnosed with AD and 48 controls, were included. Each groupconsisted of 23 girls (47.9%) and 25 boys (52.1%). Anthropometric examinations and hormone measurements were compared.Results: The two groups, having …

Adjunctive Use Of Laser Biostimulation With Nonsurgical Periodontal Therapy: A Split Mouth, Randomized, Case-Control Study In Diabetic And Nondiabetic Periodontitispatients, Funda Akansel, Umur Sakallioğlu, Müge Lütfi̇oğlu, Feyza Otan Özden, Adil Karadağ

Turkish Journal of Medical Sciences

Laser biostimulation therapy (LBT) is suggested to have positive effects on periodontal healing. This study evaluatedLBT with nonsurgical periodontal therapy (NSPT) in diabetes mellitus (DM) and systemic health (SH) conditions.Materials and methods: Thirty periodontitis patients (15 with DM and 15 with SH) were included in the study, which had a split-mouthdesign, by applying LBT in the mouth of the same systemic condition. Thus, 4 study groups were formed, as 1) NSPT – DM: NSPT alonein DM, 2) NSPT + LBT – DM: NSPT + LBT application in DM, 3) NSPT – SH: NSPT alone in SH, and 4) NSPT + …

The Stereological And Morphometrical Investigation Of Pars Lumbalis Of The Spinal Cord Innew Zealand Rabbit, Berna Duman, İftar Gürbüz

Turkish Journal of Veterinary & Animal Sciences

In the study, 12 (6 females, 6 males) healthy adult New Zealand rabbits were used to examine the morphometrical andstereological values. White matter, gray matter and total segment volume of the segments in the pars lumbalis were calculated byCavalieri’s principle. The findings were grouped according to sexand statistically evaluated. As a result, 38% of the length of the spinalcord in rabbits belonged to the pars lumbalis. The morphometric parameters were not statistically different between male and femalerabbits (p > 0.05). The segment with the biggest volume was L5. White matter’s greatest volume was the L4 segment. The volume of graymatter was …

Identification Of Dermatophytes And Comparative Efficacy Of Topical Antifungals Fortreating Canine Dermatophytosis, Arun Prakash Vadakkoot, Rathish Ramachandran Latha, Neeraja Eramthottil, Lijo John, Bipin Kuriyedath Chitharalil, Deepa Padinjare Meleppat

Turkish Journal of Veterinary & Animal Sciences

Dermatophytosis is a potentially zoonotic superficial skin infection caused by keratinophilic fungi. Identification ofdermatophytes aids in understanding the epidemiology of infections and finding out better treatment modalities. The study aimed toidentify dermatophytes in dogs and compare the effectiveness of three different topical drugs for treating dermatophytosis. Molecularidentification of dermatophyte isolates obtained on culturing was done by restriction fragment length polymorphism of the ampliconobtained by polymerase chain reaction of the Internal Transcribed Spacer (ITS) region of the recombinant DNA. Thirty of the positivecases were divided into three groups, Group I was treated with shampoo containing 2% each of miconazole chlorhexidine, Group …

Comparison Of Nonlinear Models For Predicting Live Weight Growth Curves In Lambproduction Of Kıvırcık And Karacabey Merino, Vasfi̇ye Kader Esen, Orhan Karadağ, Cengi̇z Elmaci, Seli̇m Esen

Turkish Journal of Veterinary & Animal Sciences

To achieve sustainable lamb production, it is crucial to determine the optimal slaughter age for maximum economic efficiencyand have a comprehensive understanding of breed characteristics. This study focuses on evaluating different nonlinear models todetermine the optimal slaughter age for Karacabey Merino and Kıvırcık lambs, renowned for their early development and superiormeat quality, respectively. The dataset comprised age-related live weight data from 98 lambs, including 36 female and 15 male Kıvırcıklambs, as well as 33 female and 14 male Karacabey Merino lambs. Six models, namely, negative exponential, Brody, Gompertz, logistic,Bertalanffy, and Richards were utilized to analyze the data. The model parameters …

Editorial: Insights In Neurocognitive Aging And Behavior: 2022, Kristy A. Nielson, Annalena Venneri, Shin Murakami

Psychology Faculty Research and Publications

No abstract provided.

Braf Inhibitor Candidate Molecule Usnic Acid Might Use Both Intrinsic And Extrinsic Pathways Of Apoptosis, Burcu Peli̇n Buyuk, Demet Cansaran Duman, Turker Duman

Turkish Journal of Medical Sciences

Background/aim: Melanoma is one of the most aggressive cancers and treatment methods commonly used for patients with skin cancer include checkpoint and BRAF/MEK inhibitors, traditional chemotherapy drugs, radiation and adjuvant treatment methods. Due to the resistance and toxic effects that the patient develops against the drugs, an effective treatment method has not been developed for melanoma yet. Materials and methods: In this study we evaluated the anti-cancer effect of usnic acid (UA) on A-375 melanoma cells and human epidermal melanocytes by xCELLigence real-time cell analysis system. To determine through which cell death pathway UA exerts its anti-proliferative effect, its apoptotic …

Are Serum Thrombomodulin And Interleukin-8 Levels Associated With Disease Severity And Mortality In Critically Ill Children With Respiratory Failure?, Di̇lan Akgün Ünlü, Hazal Ceren Tuğrul, Selen Ceren Çakmak, Gürkan Atay, Seher Erdoğan

Turkish Journal of Medical Sciences

Background/aim: Thrombomodulin (TM) is found on endothelial cell surfaces and increases in response to endothelial injury of different organs. Interleukin (IL)-8 regulates pulmonary inflammation. TM and IL-8 are candidate biological markers of acute respiratory distress syndrome (ARDS). The aim of the present study was to compare TM and IL-8 levels in pediatric patients with and without ARDS who received respiratory support and to determine their relationships with prognosis.Materials and methods: This was a prospective observational study of 55 patients who received respiratory support in the pediatric intensive care unit. Eighteen patients without active infection were defined as the control group. …

2023-2024 Georgia Southern University Women's Swimming And Diving Roster, Georgia Southern University

Women's Swimming Records

No abstract provided.

Expression Of Growth Differentiation Factor 15 (Gdf-15) In Placental Tissue Of Full- Term Pregnant Women With Hypertensive Disorders In A Western Australian Population, Elsa H. L. Chew

Theses: Doctorates and Masters

Women who experience hypertensive pregnancy disorders (HPDs) during pregnancy, mainly pre-eclampsia (PE), are four times more likely to develop hypertension after pregnancy and therefore have an increased risk of developing cardiovascular diseases (CVD) in the future. Pregnancy involves a high level of cardiovascular stress and the development of some complications. This has the potential to increase a woman’s susceptibility to vascular or metabolic disease risk in the future. In this research, pre-eclampsia (PE) and pregnancyinduced hypertension (PIH) were representatives of HPDs and were analysed together for the expression of Growth Differentiation Factor-15 (GDF-15) relative to their healthy agematched controls.

GDF-15 …

The Food And Habitat Effects Of Detrital Kelp As A Trophic Subsidy To Seagrass-Inhabiting Mesograzers, Jessica Billinghurst

Theses: Doctorates and Masters

Seascapes are connected through the transfer of energy from the movement of fauna, detritus, and nutrients among habitats. This exchange of resources can influence food web dynamics in the recipient system, increasing productivity and biodiversity, thus creating spatial subsidies. Spatial subsidies are usually characterised by the transfer of resources from highly productive donor systems to lower productive recipient systems. However, recent work suggests that recipient systems with comparably high productivity, such as seagrass meadows, may benefit from spatial subsidies. Kelp is regularly eroded from reefs and provides a vector for nutrient and detrital transfer to seagrass meadows, where it can …

Novel Methods For Assessing Pulmonary And Cardio-Vascular Limitations To Aerobic Performance In Older And Younger Populations, Toni Haddad

Theses: Doctorates and Masters

Around the world, life expectancy is increasing, the ageing population is growing, and maintaining quality of life at an older age currently represents a major global challenge. While ‘successful ageing’ relies on a variety of factors, aerobic performance and exercise capacity are key determinants and attenuating their decline is of the utmost importance. The decrease in maximal oxygen consumption is often considered as a major determinant explaining the age[1]related decline in aerobic performance. Yet, multiple physiological systems are impaired with ageing and their contribution to aerobic limitation in older individuals is unclear. Understanding how the limitations to aerobic performance may …

Western Australian Mothers' Experiences Of Breastfeeding Support In Hospital After Birth: A Mixed Methods Study, Justine Van Der Watt

Theses: Doctorates and Masters

Background: The benefits of breastfeeding are well established for infants, mothers and the community, with the World Health Organisation recommending that infants be exclusively breastfed up to six months of age with an achievable goal of 70% globally. Yet in Australia only 15-37% may be reaching that goal. There have also been reported benefits and desires for mothers to be supported with their breastfeeding in order to increase and prolong breastfeeding duration and exclusivity, especially early after birth. However, there is limited research or literature exploring what experiences mothers are having with breastfeeding support, especially during their hospital admissions in …

Preparing For End Of Life In A New Country: A Grounded Theory Study On African Migrants Living In Australia, Gertrude Gondwe Phiri

Theses: Doctorates and Masters

African migration to Australia has grown in the past 20 to 25 years with many migrants staying permanently. This has led to migrants dying away from their birthplaces where family is responsible for end-of-life care planning for the individual. Although migrating to Australia is considered a great achievement, many migrants also experienced challenges. Previous studies have explored the barriers faced by migrants in relation to end-of-life care but have not addressed the cause of those challenges. This constructivist grounded theory study examines how migrants from three African countries, Malawi, Zambia, and Zimbabwe (MZZ) prepare for end-of-life in Australia. The study …

Prevalence Trends Of Foodborne Pathogens, Bacillus Cereus, Non Stec Escherichia Coli And Staphylococcus Aureus In Ready-To-Eat Foods Sourced From Restaurants, Cafés, Catering And Takeaway Food Premises, Nicole Foxcroft

Theses: Doctorates and Masters

The foodborne pathogens of Bacillus cereus (B. cereus), non STEC Escherichia coli (non STEC E. coli) and Staphylococcus aureus (S. aureus) are currently non-notifiable in Australia unless attributed to a food poisoning outbreak. Due to the lack of data around individual cases and isolations in foods, any changes in prevalence may go undetected. The aim of the study was to determine any changes in prevalence of B. cereus, non STEC E. coli and S. aureus in ready-to-eat foods (RTE) sampled from Western Australian restaurants, cafés, catering facilities, and takeaway food premises during the period July 2009 to June 2022. The …

First-Line Chemoimmunotherapy And Immunotherapy In Patients With Non-Small Cell Lung Cancer And Brain Metastases: A Registry Study, Lauren J. Brown, Victor Khou, Chris Brown, Marliese Alexander, Dasantha Jayamanne, Joe Wei, Lauren Gray, Wei Chan, Samuel Smith, Susan Harden, Antony Mersiades, Lydia Warburton, Malinda Itchins, Jenny H. Lee, Nick Pavlakis, Stephen J. Clarke, Michael Boyer, Adnan Nagrial, Eric Hau, Ines Pires Da Silva, Steven Kao, Benjamin Y. Kong

Research outputs 2022 to 2026

Introduction: Brain metastases commonly occur in patients with non-small cell lung cancer (NSCLC). Standard first-line treatment for NSCLC, without an EGFR, ALK or ROS1 mutation, is either chemoimmunotherapy or anti-PD-1 monotherapy. Traditionally, patients with symptomatic or untreated brain metastases were excluded from the pivotal clinical trials that established first-line treatment recommendations. The intracranial effectiveness of these treatment protocols has only recently been elucidated in small-scale prospective trials. Methods: Patients with NSCLC and brain metastases, treated with first-line chemoimmunotherapy or anti-PD-1 monotherapy were selected from the Australian Registry and biObank of thoracic cancers (AURORA) clinical database covering seven institutions. The primary …

Shifting Soil Fungal Communities In Response To Fire And Weed Management In Urban Banksia Woodlands, Aaron Justin Brace

Theses: Doctorates and Masters

This research aims to fill the knowledge gap in soil fungi in the Banksia woodland and emphasizes considering holistic ecosystem dynamics in invasive species management strategies. This is accomplished by surveying soil fungi under different fire regime across the Swan Coastal Plain, and within both in and ex situ herbicide application trials. This is the first such study to investigate the fungal component of the Banksia woodland so thoroughly. Chapter 2 quantified and analysed changes in soil fungal community composition and functional groups over a 50-year fire chronosequence in fire-prone Banksia woodland in southwestern Australia. Effects were variable, but fungal …

Crop Yield Using Novel Parametric L-System Plant Modelling, Christopher Cameron Napier

Theses: Doctorates and Masters

This research considers a system for the recognition of real plant parts through image analysis based upon synthetic plant modelling. It aims to use data pipelines and synthetic datasets to define recognizable features that assist in the efficient analysis of real plants and plant images. This research asks about the efficacy of L-systems in accurately simulating wheat crop characteristics. It specifically focusses on readable, understandable, accurate, and complex L-system algorithms. The research examines wheat crops in terms of phenotypes and examines the accuracy of a dataset in support of real image annotation. The methodology used was experimental in nature and …

Effect Of Esol Co-Teacher Certification On Student Achievement In High School Core Content Areas In A Georgia Suburban School District, Megan Devoss, Robert A. Griffin, Diana Mindrila

Georgia Educational Researcher

This quantitative study investigated the relationship between ESOL co-teacher content certification and student achievement in secondary classrooms. The sample consisted of English Learners (ELs; N = 185) in a suburban district in Georgia. The study focused on three core content subjects: Algebra, Biology, and Economics. Content certification was verified through a state agency, and student achievement was assessed using Georgia Milestones test scores. A range of statistical tests, including descriptive and multilevel regression analyses, were employed to analyze the data. The results indicated that Milestones grade conversion scores were higher when teachers had dual certification (M = 65.63, SD …