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Articles 1111 - 1140 of 1265178
Full-Text Articles in Entire DC Network
Justice Lost And Found Playlist, Njaj Editorial Board
Justice Lost And Found Playlist, Njaj Editorial Board
Nebraska Journal on Advancing Justice
No abstract provided.
Oh No, Don't Let The Rain Come Down..., Mervyn Bennun
Oh No, Don't Let The Rain Come Down..., Mervyn Bennun
Nebraska Journal on Advancing Justice
No abstract provided.
The Failure Of Law Reform: Housing Codes, Bans On Retaliatory Eviction, And The Implied Warranty Of Habitability, David Ray Papke
The Failure Of Law Reform: Housing Codes, Bans On Retaliatory Eviction, And The Implied Warranty Of Habitability, David Ray Papke
Nebraska Journal on Advancing Justice
No abstract provided.
Unauthorized Practice Of Law Reform And Domestic Violence Advocacy: Advocate Perspectives On Legal Training, Cayley Balser, Stacy Jane
Unauthorized Practice Of Law Reform And Domestic Violence Advocacy: Advocate Perspectives On Legal Training, Cayley Balser, Stacy Jane
Nebraska Journal on Advancing Justice
No abstract provided.
Introduction, Katherine M. Houlden
Introduction, Katherine M. Houlden
Nebraska Journal on Advancing Justice
No abstract provided.
Volume 3, Issue 1 Masthead, Njaj Editorial Board
Volume 3, Issue 1 Masthead, Njaj Editorial Board
Nebraska Journal on Advancing Justice
No abstract provided.
Comparison Between The Effect Of Ultrasound-Guided Rectus Sheath Block And Ultrasound-Guided Transversus Abdominis Plane Block On Postoperative Analgesia In Patients Undergoing Paraumbilical Hernia Repair Under General Anesthesia, Rusul Ibrahim Khalil Karim Al-Qayyim Dr., Mohammed Jawad Al-Kadas Dr.
Comparison Between The Effect Of Ultrasound-Guided Rectus Sheath Block And Ultrasound-Guided Transversus Abdominis Plane Block On Postoperative Analgesia In Patients Undergoing Paraumbilical Hernia Repair Under General Anesthesia, Rusul Ibrahim Khalil Karim Al-Qayyim Dr., Mohammed Jawad Al-Kadas Dr.
Iraqi Postgraduate Medical Journal
BACKGROUND: Paraumbilical hernia repair surgeries are associated with substantial postoperative pain. Ultrasound-guided Rectus sheath block and Transversus abdominis plane block are commonly used to reduce postoperative requirement for narcotics . OBJECTIVE: For stud the efficacy of US-guided Rectus sheath block versus US-guided Transversus abdominis plane block for postoperative pain . PATIENTS AND METHOD: . 40 Iraqi patients were scheduled for elective paraumbilical hernia repair under general anesthesia (GA) .Patients were divided in to two groups: Group A (20) patients received bilateral ultrasound-guided rectus sheath block (RSB), Group B (20) patients received bilateral ultrasound-guided transversus abdominis plane block (TAPB). VAS score …
Role Of The Serum Kisspeptin-1 Level In Early And Late-Onset Preeclampsia, Rawia Muhsin Helal Dr., Shatha A. Kareem Mahmoud Dr.
Role Of The Serum Kisspeptin-1 Level In Early And Late-Onset Preeclampsia, Rawia Muhsin Helal Dr., Shatha A. Kareem Mahmoud Dr.
Iraqi Postgraduate Medical Journal
BACKGROUND: Preeclampsia is a major cause of maternal and perinatal morbidity and mortality worldwide, affecting 2–8% of pregnancies. Early diagnosis remains challenging, particularly in asymptomatic cases, highlighting the need for reliable biomarkers to improve timely detection and intervention. OBJECTIVE: To evaluate the role of serum kisspeptin in the detection of early-onset and late-onset preeclampsia. PATIENTS AND METHODS: An case control study was conducted at Al-Yarmouk Teaching Hospital obstetric outpatient clinic and labour ward in Baghdad. The 180 pregnant women were separated into four groups: 45 with early-onset preeclampsia and 45 gestational age-matched controls, and 45 with late-onset and 45 controls. …
Epidemiology Of Pompe Disease In Iraq, Noor Mohammed Saeed Dr., Akram Mohammed Al Mahdawi Dr.
Epidemiology Of Pompe Disease In Iraq, Noor Mohammed Saeed Dr., Akram Mohammed Al Mahdawi Dr.
Iraqi Postgraduate Medical Journal
BACKGROUND: Pompe disease is a rare, progressive, and autosomal recessive lysosomal storage disorder caused by mutations in the acid α-glucosidase gene. This study illustrates a survey of infantile and late-onset Pompe disease (IOPD and LOPD) in Iraq. We have contacted the pediatricians and neurologists at the hospitals to request a set of clinical and genetic data for patients with IOPD and LOPD. OBJECTIVE: To determine the epidemiological distribution of Pompe disease in Iraq. MATERIALS AND METHODS: The study was performed in Iraqi hospitals; patients enrolled between March to October 2023, included 44 patients, from infancy to late adulthood, diagnosed by …
The Association Of Oncogenic Hpv Strains With Colposcopic And Histopathological Parameters Of Cervical Intraepithelial Neoplasia, Teeba Khalid Hamid Dr., Ban Hadi Hameed Prof.
The Association Of Oncogenic Hpv Strains With Colposcopic And Histopathological Parameters Of Cervical Intraepithelial Neoplasia, Teeba Khalid Hamid Dr., Ban Hadi Hameed Prof.
Iraqi Postgraduate Medical Journal
BACKGROUND: Cervical cancer is among the most prevalent malignancies impacting women, particularly in low- and middle-income countries. The prompt identification of precancerous lesions is essential, as early care may avert the development of aggressive malignancy. OBJECTIVE: To assess the correlation between oncogenic human papillomavirus (HPV) strains and colposcopic and histological characteristics of cervical intraepithelial neoplasia (CIN). METHODS: A cross-sectional study was conducted from January to December 2024 at the cervical precancerous lesion clinic of Al-Yarmouk Teaching Hospital, Baghdad. Thirty-seven women with abnormal Pap smear results were enrolled in the study. All participants underwent colposcopic examination followed by cervical biopsy for …
Microscopical, Cytological, And Colposcopic Findings In Women Of Reproductive Age With Abnormal Vaginal Discharge, Mashariq Hasan Abdulhasan Dr., Sura Saladdin Salman Dr.
Microscopical, Cytological, And Colposcopic Findings In Women Of Reproductive Age With Abnormal Vaginal Discharge, Mashariq Hasan Abdulhasan Dr., Sura Saladdin Salman Dr.
Iraqi Postgraduate Medical Journal
BACKGROUND: Abnormal vaginal discharge is a frequent gynecological complaint among women of reproductive age and is commonly related to infectious etiologies. In some cases, it may be associated with underlying cervical epithelial abnormalities. OBJECTIVE: To identify the prevalent causative organisms of abnormal vaginal discharge in reproductive-age women and to assess the association between microbiological findings, Pap smear results, and colposcopic findings. PATIENTSANDMETHODS: A cross-sectional observational study was conducted on 125 women of reproductive age presenting with abnormal vaginal discharge at the Cervical Cancer Screening Clinic, Al-Yarmouk Teaching Hospital, Baghdad, between January and December 2024. All participants underwent clinical evaluation, microbiological …
The Effect Of Obesity On The Active Phase Of The First Stage Of Labour, Sarah Raheem Jabbar Dr., Bushra Mohammed Majeed Dr.
The Effect Of Obesity On The Active Phase Of The First Stage Of Labour, Sarah Raheem Jabbar Dr., Bushra Mohammed Majeed Dr.
Iraqi Postgraduate Medical Journal
BACKGROUND: Obesity is a growing global health concern with significant implications for pregnant women. The study investigates the impact of obesity on the first stage of labor, focusing on labor progression and associated complications. OBJECTIVE: To investigate the impact of obesity on duration and progression of the active phase of first stage of labor and delivery outcome. PATIENTS AND METHODS: A prospective case-control study conducted at Al-Elwiya Maternity Teaching Hospital from January 2024 to January 2025. The study included 200 women divided into two groups: 100 obese (BMI ≥30 kg/m²) and 100 non-obese (BMI 18.5–24.9 kg/m²). Data was collected through …
Prevalence And Demographic Determinants Of Allergen Sensitisation In Iraqi Patients, Falah Hasan Hadi Dr., Mariam Amer Al-Ashbal Dr.
Prevalence And Demographic Determinants Of Allergen Sensitisation In Iraqi Patients, Falah Hasan Hadi Dr., Mariam Amer Al-Ashbal Dr.
Iraqi Postgraduate Medical Journal
BACKGROUND: Allergen sensitisation patterns vary geographically and are influenced by demographic factors. Updated data from Iraq remains limited. OBJECTIVE: To determine the pattern and demographic determinants of allergen sensitisation among patients undergoing skin prick testing at an Iraqi allergy centre. PATIENTS AND METHODS: This cross-sectional study included 791 subjects aged 5–64 years who were referred to Al-Zahraa Centre for Consultation for allergy and asthma during 2023-2024. Saline dilutions of grass, mite, mould, tree and wood allergens were tested by allergy skin prick tests. Reactions were considered positive if the lab wheels had a diameter >3 mm. RESULTS: Overall, 73.6% of …
Detection Of G6pd Deficiency And Its Impact On Red Blood Cell Indices In Patients With Β-Thalassemia Trait And Sickle Cell Disease, Sara Ali Falih Dr., Wesam Al-Zubaidi Dr.
Detection Of G6pd Deficiency And Its Impact On Red Blood Cell Indices In Patients With Β-Thalassemia Trait And Sickle Cell Disease, Sara Ali Falih Dr., Wesam Al-Zubaidi Dr.
Iraqi Postgraduate Medical Journal
BACKGROUND: Glucose-6-phosphate dehydrogenase (G6PD) deficiency is a common X-linked enzymatic disorder that impairs the antioxidant defense of red blood cells. Hemoglobinopathies, particularly β-thalassemia trait and sickle cell disease (SCD), are prevalent inherited disorders causing anemia and alterations in red cell indices. Coinheritance of G6PD deficiency with these conditions may further influence hematological status. OBJECTIVE: To evaluate the frequency and hematological impact of G6PD deficiency among patients with β thalassemia trait and sickle cell disease. PATIENTS AND METHODS: A cross-sectional analytical study was conducted on 100 patients (55 males, 45 females) aged 3–45 years with clinically confirmed β-thalassemia trait or sickle …
The Types And Clinicopathological Characteristics Of Childhood Solid Tumors In Duhok City: A Case Series Study, Khalid Hussien Haleem Dr., Khalid Nawaf Abdurrahman Dr.
The Types And Clinicopathological Characteristics Of Childhood Solid Tumors In Duhok City: A Case Series Study, Khalid Hussien Haleem Dr., Khalid Nawaf Abdurrahman Dr.
Iraqi Postgraduate Medical Journal
BACKGROUND: Since cancer is a leading cause of death for children and adolescents worldwide and constitutes a challenge to health care systems, childhood cancer data systems are needed to drive continuous improvements in care quality. OBJECTIVE: To provide an overview of childhood malignant solid tumors in Duhok city, we reported the clinicopathological features of 33 cases. PATIENTS AND METHOD: During the 17-month period from June 2019 to November 2020, 33 cases of childhood solid cancers were diagnosed at Jeen Centre, regional referral center in duhok government.We performed a pathological and clinical evaluation of these tumors, including tumor types, patient age …
Autism Spectrum Disorder Knowledge Among Pediatricians: A Cross-Sectional Study In Baghdad, Amina Saad Abdullah Dr., Zainab Ali Saleem Dr., May Abdullah Mohammed Dr., Dina Mahmood Thiab Dr., Hassan Z. Tark Dr., Ziad T. Abd Ali Dr.
Autism Spectrum Disorder Knowledge Among Pediatricians: A Cross-Sectional Study In Baghdad, Amina Saad Abdullah Dr., Zainab Ali Saleem Dr., May Abdullah Mohammed Dr., Dina Mahmood Thiab Dr., Hassan Z. Tark Dr., Ziad T. Abd Ali Dr.
Iraqi Postgraduate Medical Journal
BACKGROUND: Autism spectrum disorder is increasing worldwide; however, knowledge about it among health providers is still inadequate. OBJECTIVE: The study aims to assess the knowledge of the pediatricians (residents and specialists) regarding autism spectrum disorder. METHODS: A cross-sectional descriptive study design was conducted during December 2024. A total of 49 resident and specialist doctors (in pediatric specialty) who were working and/or studying at Children Welfare Hospital in Baghdad during the time period of the study were included. The participants completed the Knowledge about Childhood Autism among Healthcare Workers (KCAHW) questionnaire and some demographic questions during their activity meetings. RESULTS: The …
The Evaluation Of Outcome Between Trocar Insertion Versus Laparotomy In Lower End Insertion In Ventriculoperitoneal Shunt: A Longitudinal Study Of 100 Patients, Ali Audai Mahmood Dr., Ahmed A Salam Al Atraqchi Prof.
The Evaluation Of Outcome Between Trocar Insertion Versus Laparotomy In Lower End Insertion In Ventriculoperitoneal Shunt: A Longitudinal Study Of 100 Patients, Ali Audai Mahmood Dr., Ahmed A Salam Al Atraqchi Prof.
Iraqi Postgraduate Medical Journal
BACKGROUND: Hydrocephalus is a condition of abnormal dilation of the ventricular system within the cranium. Hydrocephalus is a common brain condition that is treated with neurosurgery. The diversion of cerebrospinal fluid to relieve hydrocephalus may be accomplished via a number of different methods. The most commonly used method is the ventriculoperitoneal shunt (VPS). OBJECTIVE: To compare the outcome and complications between trocar and nini laparotomy in the lower end insertion in the ventriculoperitoneal shunt. PATIENTS AND METHODS: A longitudinal study of 100 patients with hydrocephalus who attended the Dr. Saad Al-Witry Teaching Hospital in Baghdad from October 2018 to April …
Cephalad Intracranial Migration Of A Lumboperitoneal Shunt Catheter In A Patient With Idiopathic Intracranial Hypertension: A Case Report, Ali Hatem Jawad Dr., Yasir M. H. Hamandi Prof.
Cephalad Intracranial Migration Of A Lumboperitoneal Shunt Catheter In A Patient With Idiopathic Intracranial Hypertension: A Case Report, Ali Hatem Jawad Dr., Yasir M. H. Hamandi Prof.
Iraqi Postgraduate Medical Journal
BACKGROUND: Lumboperitoneal (LP) shunting is an established treatment for medically refractory idiopathic intracranial hypertension (IIH), but is limited by comparatively high rates of mechanical failure. Cephalad (proximal, cranial) migration of the shunt catheter is a rare and likely underrecognized cause of shunt failure, with only a small number of cases reported. Case presentation: We report a 38-year-old woman with a three-year history of chronic headache, nausea, and blurred vision due to IIH, who remained symptomatic despite acetazolamide, serial therapeutic lumbar punctures, and two sequential LP shunt procedures. Repeat lumbar puncture opening pressure remained markedly elevated (450 mmH₂O) after the second …
Navigating Nil In Collegiate Athletics: Athletes, Institutional, And Market Perspectives, Don Lee, Hoyeol Yu, Myungwoo Lee, Minseok Cho
Navigating Nil In Collegiate Athletics: Athletes, Institutional, And Market Perspectives, Don Lee, Hoyeol Yu, Myungwoo Lee, Minseok Cho
Journal of Issues in Intercollegiate Athletics
This study examines the post-2021 NCAA Name, Image, and Likeness (NIL) era by synthesizing scholarship on how NIL policies have transformed collegiate athletics. Specifically, it explores the regulatory, economic, governance, and equity dynamics emerging from a decentralized policy environment and the rapid expansion of athlete commercialization. An AI-assisted scoping review and content analysis were conducted on NIL-related studies published in leading sport management and sport law journals since July 1, 2021. Using large language model–supported searches, thematic coding, and reliability and validity procedures, the selected studies were systematically analyzed across legal, governance, commercialization, athlete experience, and equity dimensions. Findings identified …
“Playing Mental Gymnastics”: Exploring Black Women College Athletes' Mental Health Experiences At Historically White Division I Universities, Ezinne D. Ofoegbu
“Playing Mental Gymnastics”: Exploring Black Women College Athletes' Mental Health Experiences At Historically White Division I Universities, Ezinne D. Ofoegbu
Journal of Issues in Intercollegiate Athletics
Between 2002 and 2022, over 125 college athletes died by suicide, and Division I athletes represented 45% of these deaths. In 2023, Black women college athletes at Division I universities identified racism as a mental health stressor at a higher rate than their non-Black peers. The intersectional nature of social identities and athlete status may create gendered and racialized stressors that are uniquely experienced by Black women athletes. Given the underrepresentation of Black students (i.e., athletes and nonathletes), coaches, faculty, and staff at historically white institutions (HWIs), Black women athletes are likely navigating campus relationships and environments that are shaped …
The Impact Of Toxic Leadership On Intercollegiate Athletics: Gender-Differentiated Perceptions, Tara Tietjen-Smith, Haley Blount
The Impact Of Toxic Leadership On Intercollegiate Athletics: Gender-Differentiated Perceptions, Tara Tietjen-Smith, Haley Blount
Journal of Issues in Intercollegiate Athletics
While some investigative research has been conducted to examine the impact of toxic, or destructive, leadership in sport, few studies have focused on intercollegiate athletics departments. The purpose of this study was to examine how common toxic leadership is in intercollegiate athletics departments as well as its impact. A quantitative cross-sectional survey study was designed to examine NCAA Division I and II athletics employee experiences using the Toxic Triangle of Sport Management (TToSM) as a theoretical framework. Respondents (N = 2,051) were asked questions concerning their perceptions of work environments, leadership, and organizational culture procured from three distinct and well-established …
Servingness On The Sidelines: Latina/O/X Athletic Administrators At Division I Hispanic-Serving Institutions, Guillermo Ortega
Servingness On The Sidelines: Latina/O/X Athletic Administrators At Division I Hispanic-Serving Institutions, Guillermo Ortega
Journal of Issues in Intercollegiate Athletics
This qualitative study examines how servingness is understood and enacted within NCAA Division I athletic departments at Hispanic-Serving Institutions (HSIs). Guided by Garcia et al.’s multidimensional servingness framework, the study draws on interviews with ten NCAA Division I Latina/o/x athletic administrators. Findings reveal that athletics is frequently disconnected from institutional HSI missions, with servingness often reduced to symbolic or performative practices. Limited Latina/o/x representation in athletic departments further constrains institutional capacity to serve. Despite structural exclusion, participants cultivate servingness through cultural affirmation and community building. Implications highlight the need to structurally integrate athletics into HSI missions and redistribute cultural labor.
Molecular Identification Of Tannase-Producing Microbiota From Punica Granatum L. Peel, Ulugbek A. Suyundikov, Quchqor O. Dodayev, Munavvar A. Yakhyayeva, Zahro R. Akhmedova Akhmedova
Molecular Identification Of Tannase-Producing Microbiota From Punica Granatum L. Peel, Ulugbek A. Suyundikov, Quchqor O. Dodayev, Munavvar A. Yakhyayeva, Zahro R. Akhmedova Akhmedova
CHEMISTRY AND CHEMICAL ENGINEERING
Pomegranate (Punica granatum L.) is a rich source of bioactive compounds, including polyphenols, organic acids, and tannins. Pomegranate peel, a byproduct of processing, is of interest for microbiological research. The aim of this study was to produce the enzyme tannase and identify its microbiological producers. Results obtained using MALDI-TOF MS technology showed that fungi such as Aspergillus oryzae and Talaromyces albobiverticillius are the main producers with high enzymatic activity. The obtained scores (Aspergillus oryzae – 1,77; Talaromyces albobiverticillius – 2,33) confirm the reliability of the identification. Thus, the results of this study are of great importance for the selection of …
Preparation Of Liposomes And Evaluation Of Their Toxic Properties, Aygul M. Yarilkaganova, Oybek N. Ashirоv, Otabek U. Allaev, Nigora А. Tosheva, Shakhnoz S. Azimova
Preparation Of Liposomes And Evaluation Of Their Toxic Properties, Aygul M. Yarilkaganova, Oybek N. Ashirоv, Otabek U. Allaev, Nigora А. Tosheva, Shakhnoz S. Azimova
CHEMISTRY AND CHEMICAL ENGINEERING
Liposomes are nanoscale vesicular systems composed of phospholipid bilayers capable of encapsulating both hydrophilic and hydrophobic molecules. The present study investigates the effect of temperature and repeated freeze–thaw (F/T) cycles on liposomal size, polydispersity and evaluates their cytotoxicity on MDSK cell lines using the MTT assay. Liposomes were prepared by the reverse-phase evaporation method and hydrated at different temperatures (30, 40, 50, and 60 °C). The samples were subjected to multiple F/T cycles (1–9×) to study their particle size and polydispersity index (PDI) were analyzed using dynamic light scattering (DLS). Cytotoxicity was tested using the MTT method on MDSK cell …
Dft Study Of Vanadyl Acetylacetonate Complexes With Benzimidazole Derivatives And 2-Mercaptobenzothiazole, Xolida Jabborova, Shahlo Sh. Daminova
Dft Study Of Vanadyl Acetylacetonate Complexes With Benzimidazole Derivatives And 2-Mercaptobenzothiazole, Xolida Jabborova, Shahlo Sh. Daminova
CHEMISTRY AND CHEMICAL ENGINEERING
The geometric and electronic structures of the mixed-ligand complexes [VO(AcAc)2MBT], [VO(AcAc)2AFBI] and [VO(AcAc)2FBI] (MBT is 2-mercaptobenzothiazole, AFBI is 2-aminophenyl-1H-benzimidazole, FBI is 2-phenylmethyl-1H-benzimidazole) were studied by density functional theory ((U)B3LYP/6-311G(d,p)/LanL2DZ, Gaussian 09W). The MBT molecule was found to be planar, whereas in AFBI and FBI the NH group is coplanar with the imidazole ring. Analysis of effective atomic charges and molecular electrostatic potential maps shows that the pyridine-type nitrogen atoms of the imidazole and thiazole rings (q = −0.355 to −0.301 e) are the most probable coordination sites for the vanadyl ion. The HOMO–LUMO energy …
Innovation Policy Of The Fuel And Energy Complex Of The Republic Of Uzbekistan: A Conceptual Model And An Integral Assessment Of Sustainable Technological Development, Botir Sh. Usmonov, Jahongir B. Shukurillaev
Innovation Policy Of The Fuel And Energy Complex Of The Republic Of Uzbekistan: A Conceptual Model And An Integral Assessment Of Sustainable Technological Development, Botir Sh. Usmonov, Jahongir B. Shukurillaev
CHEMISTRY AND CHEMICAL ENGINEERING
The competitiveness of a fuel and energy complex (FEC) increasingly depends less on resource endowment than on the capacity to generate, adopt and commercialise innovation. This paper develops a systemic conceptual model of innovative development for the FEC of the Republic of Uzbekistan and proposes a quantitative tool for its assessment. Drawing on national strategy documents, international-agency reports (IEA, IRENA, OECD) and the scholarly literature, the study applies systemic-structural analysis, international benchmarking, conceptual modelling and a composite-indicator method. The model represents the FEC as six interacting subsystems — state innovation policy, science and education, FEC enterprises, innovation infrastructure, digital transformation …
Simulation Of Adsorption Of Aqueous Solution Of Methylene Blue On A Composite Of Phthalocyanine And Zinc Oxide, Albert R. Koldarov, Mastura Kh. Aripova, Odilzhon E. Abdurakhmonov, Zuhra Ch. Kadirova
Simulation Of Adsorption Of Aqueous Solution Of Methylene Blue On A Composite Of Phthalocyanine And Zinc Oxide, Albert R. Koldarov, Mastura Kh. Aripova, Odilzhon E. Abdurakhmonov, Zuhra Ch. Kadirova
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of this work is to conduct a computer simulation of methylene blue adsorption from an aqueous solution onto a composite photocatalyst based on zinc oxide and zinc phthalocyanine. To understand the mechanisms of intermolecular interaction between the sorbates and the dominant crystal planes of the composite components, adsorption simulation was performed using the BIOVIA Adsorption Locator module. It is shown that the formation of the ZnO/ZnPc heterojunction promotes the synergistic stabilization of adsorbed molecules. The presence of the inorganic ZnO phase mitigates the electrostatic repulsion of chloride anions, ensuring the overall charge balance of the system, while the …
Catalytic Effect Of Metal Ions On The Oxidation Of Thiocyanate Ions With Hydrogen Peroxide, Sarvar B. Rajabov, Salmon M. Mukhammadiev, Berdakh T. Daniyarov, Haci Deveci, Shahlo Sh. Daminova
Catalytic Effect Of Metal Ions On The Oxidation Of Thiocyanate Ions With Hydrogen Peroxide, Sarvar B. Rajabov, Salmon M. Mukhammadiev, Berdakh T. Daniyarov, Haci Deveci, Shahlo Sh. Daminova
CHEMISTRY AND CHEMICAL ENGINEERING
Thiocyanate (SCN⁻) ions, formed during the cyanidation of gold ores, pose a significant environmental problem when present in mine processing wastewater. In this study, the oxidation of potassium thiocyanate model solutions (10–1000 mg/L) with hydrogen peroxide, in the presence and absence of Cu2+ and Fe2+ ions, was investigated at room temperature. Residual SCN⁻ concentrations were determined by bromatometric titration and UV-spectroscopy. Without a catalyst, H2O2 showed the weakest effect at all concentrations, leaving 6–17% residual SCN⁻ even at the highest applied dose. The addition of Cu2+ and Fe2+ ions markedly accelerated oxidation via …
Settling Method For Decolorization Of Low Molecular Weight Polyethylene, Adham E. Norkobilov, Ravshan I. Adilov, Bobur B. Aykhodjaev, Saparboy B. Yuldoshev, Lobar Sh. Kholmirzayeva
Settling Method For Decolorization Of Low Molecular Weight Polyethylene, Adham E. Norkobilov, Ravshan I. Adilov, Bobur B. Aykhodjaev, Saparboy B. Yuldoshev, Lobar Sh. Kholmirzayeva
CHEMISTRY AND CHEMICAL ENGINEERING
This study investigates the bleaching of low molecular weight polyethylene (LMWPE) by the settling (sedimentation) method. LMWPE is a by-product of polyethylene production whose discoloration is associated with trace amounts of conjugated, oxidized, and polar micro-fractions. The research was conducted in three stages: selection of the appropriate sample grade, determination of the optimal settling time, and evaluation of the temperature effect on the settling process. Results showed that only Grade-1 LMWPE samples are suitable for the settling method; Grade-2 samples yielded insufficient results and are recommended for bentonite adsorption treatment instead. Optimal settling conditions were established as 150 °C for …
Structural And Physico-Mechanical Properties Of Geomembranes Based On Recycled Polyolefins Modified With Argillite From The Sherabad Deposit, Munisa N. Davronova, Furqat B. Eshkurbonov, Azim P. Khamidov, Asal A. Ashurova, Raykhona I. Abdullayeva
Structural And Physico-Mechanical Properties Of Geomembranes Based On Recycled Polyolefins Modified With Argillite From The Sherabad Deposit, Munisa N. Davronova, Furqat B. Eshkurbonov, Azim P. Khamidov, Asal A. Ashurova, Raykhona I. Abdullayeva
CHEMISTRY AND CHEMICAL ENGINEERING
This study investigated the effect of argillite, sourced from the local Sherabad deposit and modified with maleic anhydride, on the physical and mechanical properties of geomembranes based on recycled high-density polyethylene (r-HDPE), recycled low-density polyethylene (r-LDPE), and recycled polypropylene (r-PP). Maleic anhydride was used as a compatibilizer to ensure interfacial adhesion between the polymer matrix in the hydrophilic filler and the layered aluminosilicates, and to promote the uniform distribution of mineral particles. The experimental results showed that hybrid modification makes it possible to elevate the strength properties of all types of recycled polymers to the level of their virgin (pure) …