Macromolecular Symposia最新文献_第7页

Spectrophotometric Determination of Phenylephrine Macromolecule by Coupling with Diazotized 4-Bromo Aniline

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202400214

Assen N. Sharif, Asmaa Ahmed Mohammed

{"title":"Spectrophotometric Determination of Phenylephrine Macromolecule by Coupling with Diazotized 4-Bromo Aniline","authors":"Assen N. Sharif, Asmaa Ahmed Mohammed","doi":"10.1002/masy.202400214","DOIUrl":"https://doi.org/10.1002/masy.202400214","url":null,"abstract":"The present study outlines a meticulously devised and accurate spectrophotometric method for the determination of phenylephrine hydrochloride (PHEPH) in both its pure drug form and drop formulation. The methodology hinges upon a diazo-coupling reaction, whereby PHEPH undergoes coupling with diazotized 4-bromoaniline under alkaline conditions. The resulting yellowish-orange azo-dye demonstrates a remarkable sensitivity, quantified by the molar absorptivity value of 4.684 × 103 L mol−1 cm−1. The pinnacle of absorption occurs at 459 nm, and the linearity of the method is impeccably upheld within the concentration range of 3–48 µg 10 mL−1 of PHEPH, as dictated by Beer's law. An aspect of paramount significance is the enduring stability of the product's coloration, evincing minimal alteration in absorbance over duration of up to 60 min. Notably, the recovery percentage stands at an impressive 100.1376%, testifying to the method's accuracy, while the relative standard deviation (RSD%) of a mere 0.310178% underscores its precision. The applicability of this method extends seamlessly to the estimation of PHEPH within nasal drop formulations, yielding results of commendable reliability and consistency.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Red Melinjo Peel Extract as a Source of Encapsulated Nanocarotenoid for Food Fortification

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202400152

Hariton Harinata, Vania Clarensia, Theresia Bhakti, Ata Aditya Wardana, R. Haryo Bimo Setiarto

引用次数: 0

Preparation of Nickel-Grafted Zeolite From a Local Mineral Ore and Studying Their Catalytic Properties

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202400221

Mohsen Ismael Khalil, Nabeel Jamal Ayed, Raghed Yousif Ghazal

{"title":"Preparation of Nickel-Grafted Zeolite From a Local Mineral Ore and Studying Their Catalytic Properties","authors":"Mohsen Ismael Khalil, Nabeel Jamal Ayed, Raghed Yousif Ghazal","doi":"10.1002/masy.202400221","DOIUrl":"https://doi.org/10.1002/masy.202400221","url":null,"abstract":"The study encompasses an investigation of a local natural mineral material found in the Nimrud region/Ibrahim Al-Khalil village (40 km southeast of Mosul city). This is achieved through chemical analysis and X-ray fluorescence (XRF) to identify its various elemental components. Subsequently, X-ray diffraction (XRD) is employed to determine the percentage ratios of clay minerals (natural zeolites) and nonclay minerals comprising the natural mineral ore. The natural zeolite is then selectively concentrated by removing carbonates, iron, and reactive silica (amorphous silica) followed by impregnation with nickel using the compound Ni(NO3)2.6H2O. The properties and characteristics of the prepared zeolites (impregnated and nonimpregnated) are investigated using XRF, XRD, Brunauer–Emmett–Teller (BET) surface area analysis, scanning electron microscopy (SEM), as well as thermogravimetric analysis (TGA). The analysis reveals its compliance with both chemical and crystalline specifications of zeolites, in addition to good surface area, selective porous channels, and thermal stability.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Relationship of Glucose Molecule and Thyroid Macromolecule Hormones Disorder in Children

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202400216

Mohanad Mohammed Hussein, Nadia Ahmed Saleh

{"title":"Relationship of Glucose Molecule and Thyroid Macromolecule Hormones Disorder in Children","authors":"Mohanad Mohammed Hussein, Nadia Ahmed Saleh","doi":"10.1002/masy.202400216","DOIUrl":"https://doi.org/10.1002/masy.202400216","url":null,"abstract":"This study aimed to identify the relationship between glucose levels and thyroid disorders in children admitted in the Emergency Children's Hospital. This study is carried-out on 60 children that divided into three groups that divided into 1st group consists of 20 patients of normal thyroid function and glucose level and considered as a control group, 2nd group that consists of 20 patients that suffering from hyperthyroidism and the 3rd group that consists of 20 patients, which are suffering from hypothyroidism. Our study concluded that, in T1DM patients with normal thyroid function, thyroid hormone levels are closely related to glucose and lipid metabolism, so it is particularly important to detect thyroid feature in T1DM patients, which is useful for early detection and correction of bizarre thyroid function, and similarly, it might also enhance the ailment of glucose and lipid metabolism and forestall the complications of T1DM. The results also cleared that, in children with hyperthyroidism have a higher level of blood glucose than the normal control patients, while in hypothyroidism, the blood glucose level decreased than the normal control group and the increasing level of glucose in hyperthyroidism is associated with decreasing level of Vitamin D and increasing level of serum lipids total cholesterol, serum triglycerides LDL-C, VLDL-C, and increasing the athrogenic index.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and Characterization of Silver(I) Macromolecules Containing Macrocyclic Dithiocarbamate Ligand and Phosphines

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202400217

Hala Wathik Omar, Modher Y. Mohammed, Asra'a Ismail Yaseen

{"title":"Synthesis and Characterization of Silver(I) Macromolecules Containing Macrocyclic Dithiocarbamate Ligand and Phosphines","authors":"Hala Wathik Omar, Modher Y. Mohammed, Asra'a Ismail Yaseen","doi":"10.1002/masy.202400217","DOIUrl":"https://doi.org/10.1002/masy.202400217","url":null,"abstract":"This study delineates the synthesis of a series of macrocyclic dinuclear metal dithiocarbamate-based complexes. The synthesis methodology encompasses the preparation of sodium uracil bis dithiocarbamate (U-DTC) by a controlled addition of carbon disulfide (CS2) to uracil within a NaOH medium under refrigerated conditions (0–5 °C). The resultant U-DTC ligand serves as the foundation for novel Ag(I) complexes, incorporating phosphine ligands, specifically dppe and dppp, at a stoichiometric ratio of 2:1 (phosphine: metal). Additionally, complexes are formed with PPh3 at a ratio of 4:1 (phosphine: metal). Detailed characterization through spectroscopic methodologies, including FTIR, 1H-NMR, and 13C-NMR analyses, reveals the coordination mode of U-DTC with the Ag center. The spectroscopic evidence confirms the attachment of U-DTC to the silver center through a bidentate fashion, involving both sulfur atoms in a chelating manner. This synthetic approach underscores the strategic utilization of U-DTC as a precursor to engineer novel Ag(I) complexes, employing phosphine ligands in controlled ratios. The spectroscopic elucidation of the coordination mode provides crucial insights into the structural arrangement and bonding characteristics within the synthesized complexes, offering a foundation for further exploration and application of these complexes in diverse chemical contexts.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anti-Electromagnetic Radiation of Carbon Nanotubes Decorated PbO: Synthesis and Characterization

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202400244

Fatima Haider Askar, Ghazwan Hassan Abdel Wahab Al-Sumaidaie, Hoda Ali Al-Saadi

引用次数: 0

Study on the Immittance Response of Alginate-PVA-(NH4)2SO4 Biopolymer Complexed System for Application in Electrochemical Devices

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202300259

Nuraziliana Muhd Ghazali, Siti Nor Azlin Azahar, Ahmad Salihin Samsudin

{"title":"Study on the Immittance Response of Alginate-PVA-(NH4)2SO4 Biopolymer Complexed System for Application in Electrochemical Devices","authors":"Nuraziliana Muhd Ghazali, Siti Nor Azlin Azahar, Ahmad Salihin Samsudin","doi":"10.1002/masy.202300259","DOIUrl":"https://doi.org/10.1002/masy.202300259","url":null,"abstract":"The recent surge in attention focuses on developing biopolymer materials as electrolytes for electrochemical devices due to the growing interest in green energy storage materials. This can bring numerous lucrative prospects and achieve lower costs while being environmentally benign. The work involves preparing a solid blend polymer electrolyte (SBE) system that conducts H+ ions. This system is made up of an alginate-poly(vinyl alcohol) (PVA) polymer blend and ammonium sulfate [(NH4)2SO4], and it is created utilizing the solution casting approach. Fourier transform infrared spectroscopy (FTIR) analysis verifies the interaction between polymer-salt complexes through the coordination of polymer blends. The electrical impedance spectroscopy (EIS) technique is employed to study the immittance response properties of the produced SBEs system at ambient temperature. The sample with a composition of 15 wt% of (NH4)2SO4, exhibits the optimum ionic conductivity and is measured at 1.27 × 10−4 S cm−1. Based on the dielectric analysis, it is evident that the SBEs system follows the trend of ionic conductivity and exhibits non-Debye theory.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermo-Physical Analyses of Palm Oil Based Polyurethane Coating

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202300224

Siti Noor Hidayah Mustapha, Hannan Zamri, Rasidi Roslan, Shamsul Zakaria, Rohani Mustapha

{"title":"Thermo-Physical Analyses of Palm Oil Based Polyurethane Coating","authors":"Siti Noor Hidayah Mustapha, Hannan Zamri, Rasidi Roslan, Shamsul Zakaria, Rohani Mustapha","doi":"10.1002/masy.202300224","DOIUrl":"https://doi.org/10.1002/masy.202300224","url":null,"abstract":"This research investigates the thermo-physical properties of thiol-ene UV curable palm oil urethane acrylate coating. Palm oil-based polyurethane (EPOUA) oligomer is synthesized from epoxidized palm oil by acrylation and isocyanation process. Then, the oligomer is mixed with 1,2-ethanedithiol (EDT) monomer and followed by di and tri-acrylate monomers to initiate thiol-ene reaction under UV radiation. The effect of different concentrations of EDT on the thermo-physical performances of palm oil polyurethane coating is studied. The sample is characterized with Fourier Transform Infrared Spectrophotoscopy (FTIR) to confirm the chemical interaction of EDT with the EPOUA and other monomers. The sample is further analyzed on its microstructure, thermal and physical properties using X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), gel content, and water contact angle. The XRD results proved that the addition of higher EDT provides higher d-spacing and peak intensity reflected to higher molar mass and higher crosslinking density is taking place. This finding is also in line with the DSC results as higher curing peak and total heat (J g−1) for curing observed at higher EDT concentration. The gel content and water contact angle also improve at higher amount of EDT resulting to a better crosslinking density and surface tension to the coating samples. The highest curing heat energy and gel content is at 2% thiol (0.42 J g−1 and 85% respectively), while 4% EDT shows the highest contact angle (101.3°).","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Properties and Filtration Performance of Porous Clay Membrane Fabricated at Various Sintering Temperatures

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202300225

Rumaizah Che Zulkifli, Fazureen Azaman, Mohd Hasmizam Razali, Asmadi Ali, Mohd Faiz Hassan, Mohd Al Amin Muhamad Nor

{"title":"Properties and Filtration Performance of Porous Clay Membrane Fabricated at Various Sintering Temperatures","authors":"Rumaizah Che Zulkifli, Fazureen Azaman, Mohd Hasmizam Razali, Asmadi Ali, Mohd Faiz Hassan, Mohd Al Amin Muhamad Nor","doi":"10.1002/masy.202300225","DOIUrl":"https://doi.org/10.1002/masy.202300225","url":null,"abstract":"A porous clay membrane is fabricated using natural ball clay and sintered at various temperatures ranging from 800 to 1100 °C. The properties of the porous clay membrane are characterized, including shrinkage, water absorption, porosity, density, compressive strength, pure water permeation, and turbidity removal from aquaculture wastewater. A clear trend is observed from the findings. As the sintering temperature increases, the water absorption, porosity, and membrane permeation decreases from 62.25% to 43.67%, 57% to 43%, and 4356 to 2235 L h−1 m−2 bar−1, respectively. Conversely, shrinkage, density, compressive strength, and turbidity removal show an opposite correlation, increasing from 9.09% to 18.18%, 0.84 to 1.0 kg m−3, 0.95 to 4.11 MPa, and 79% to 94%, respectively. In summary, the sample sintered at 1000 °C emerges as the optimal choice for aquaculture wastewater filtration. It strikes a balance between the desired density and strength while maintaining an appropriate porosity level and exceptional turbidity removal capacity. This cost-effective ceramic filter exhibits promising properties in producing clear effluent.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Methacrylic Acid (MAA)-Chemical Grafted Polyethersulfone Nanofiltration Membrane for Forward Osmosis Application

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202300227

Siti Nudra Shafinie Ab Aziz, Mazrul Nizam Abu Seman, Syed Mohd Saufi Tuan Chik, Abdul Wahab Mohammad

{"title":"Methacrylic Acid (MAA)-Chemical Grafted Polyethersulfone Nanofiltration Membrane for Forward Osmosis Application","authors":"Siti Nudra Shafinie Ab Aziz, Mazrul Nizam Abu Seman, Syed Mohd Saufi Tuan Chik, Abdul Wahab Mohammad","doi":"10.1002/masy.202300227","DOIUrl":"https://doi.org/10.1002/masy.202300227","url":null,"abstract":"This study successfully modifies NF2 PES membrane via chemical grafting with methacrylic acid (MAA) at predetermined monomer concentrations, reaction times, and initiator concentrations by means of producing forward osmosis (FO) membrane. The membranes are utilized in the FO system, and performance is discussed in terms of water and solute flux. The surface characteristics of the modified membrane are analyzed in terms of water contact angle, functional groups, and degree of grafting (DG), meanwhile, morphological studies are analyzed via AFM and FESEM characterization. Based on the FO test performance, it can be concluded that increasing monomer concentration results in an increase in the permeate fluxes until a certain value is reached; only then does the permeate flux start to decrease. However, the effect of monomer concentrations is not significant on the permeate flux when shorter reactions are applied. This is probably due to the limitation of reaction time, which only allows certain values at a time for co-polymerization to be completed, hence affecting the permeate flux. Increasing reaction time offers more reactions to occur, leading to more surface grafting activity. However, prolonging the reaction time does not always improve the surface grafting, especially when higher monomer concentration and initiator concentration are involved.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0