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1.
Cureus ; 16(3): e55643, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38586810

RESUMO

Introduction Meniscus tear is a commonly encountered sports-related injury requiring surgical intervention due to knee mobility dysfunction and discomfort. Previously, it has been thought that these are non-functional vestigial structures and they used to be excised commonly. Recent studies have shown that meniscal repair gives superior results when compared with partial meniscectomy. Methods This quasi-experimental study was conducted at the Orthopedics Department, Khyber Teaching Hospital, Peshawar, Pakistan. A total of 92 patients of both genders with meniscal injuries were included. Forty-six of them underwent meniscal repair (Group A), and 46 underwent partial meniscectomy (Group B). Functional outcome was noted after 12 weeks and recorded. Results The age range was from 18 to 50 years with a mean of 28.630±6.64 years in Group A and 29.630±8.12 years in Group B. Functional outcome was excellent in 44 (95.7%) patients who underwent meniscal repair as compared to 23 (50%) patients who underwent partial meniscectomy (P= 0.000). Conclusion It is concluded that meniscal repair should be pursued over partial meniscectomy when surgically treating meniscal tears.

2.
Heliyon ; 10(5): e27392, 2024 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-38495163

RESUMO

Micro-expressions (ME) are rapidly occurring expressions that reveal the true emotions that a human being is trying to hide, cover, or suppress. These expressions, which reveal a person's actual feelings, have a broad spectrum of applications in public safety and clinical diagnosis. This study provides a comprehensive review of the area of ME recognition. A bibliometric and network analysis techniques is used to compile all the available literature related to ME recognition. A total of 735 publications from the Web of Science (WOS) and Scopus databases were evaluated from December 2012 to December 2022 using all relevant keywords. The first round of data screening produced some basic information, which was further extracted for citation, coupling, co-authorship, co-occurrence, bibliographic, and co-citation analysis. Additionally, a thematic and descriptive analysis was executed to investigate the content of prior research findings, and research techniques used in the literature. The year wise publications indicated that the published literature between 2012 and 2017 was relatively low but however by 2021, a nearly 24-fold increment made it to 154 publications. The three topmost productive journals and conferences included IEEE Transactions on Affective Computing (n = 20 publications) followed by Neurocomputing (n = 17) and Multimedia tools and applications (n = 15). Zhao G was the most proficient author with 48 publications and the top influential country was China (620 publications). Publications by citations showed that each of the authors acquired citations ranging from 100 to 1225. While publications by organizations indicated that the University of Oulu had the most published papers (n = 51). Deep learning, facial expression recognition, and emotion recognition were among the most frequently used terms. It has been discovered that ME research was primarily classified in the discipline of engineering, with more contribution from China and Malaysia comparatively.

4.
Medicine (Baltimore) ; 102(49): e36061, 2023 Dec 08.
Artigo em Inglês | MEDLINE | ID: mdl-38065885

RESUMO

RATIONALE: Congenital adrenal hyperplasia (CAH) is considered one of the most common inherited disorders. In about more than 95% of all CAH cases, the deficient enzyme is 21-hydroxylase. Infertility is an important complication of this disease, and although this topic has been studied more frequently in females, cases, and literature reviews of the causes of infertility in male patients are constantly increasing. PATIENT CONCERNS: A 28 old male with congenital adrenal hyperplasia (we assume to be a nonclassical type) presented to our institution with infertility and suspected bilateral testicular masses after 4 years of stopping dexamethasone. DIAGNOSIS: Testicular adrenal rest tumors. INTERVENTIONS: Dexamethasone was reapplied in a supraphysiologic dose (1.5 mg before bedtime) with periodic monitoring of the patient. OUTCOMES: Treatment with supraphysiologic dose of dexamethasone led to regression of these tumors and significant improvement in sperm count, resulting in being capable of having a child. LESSONS: There are many suspected causes of reduced male fertility in male CAH patients and the presence of testicular adrenal rest tumors is the main cause of infertility in this population. These benign tumors are believed to arise from ectopic adrenal cells in the testes, that grow under adrenocorticotropic hormone stimulation in poorly controlled patients. Annual scrotal ultrasound is recommended in all males with CAH for detection and treatment of these tumors as early as possible before they cause permanent damage to the seminiferous tubules and irreversible infertility.


Assuntos
Hiperplasia Suprarrenal Congênita , Tumor de Resto Suprarrenal , Neoplasias Testiculares , Humanos , Masculino , Hiperplasia Suprarrenal Congênita/complicações , Hiperplasia Suprarrenal Congênita/tratamento farmacológico , Tumor de Resto Suprarrenal/complicações , Tumor de Resto Suprarrenal/tratamento farmacológico , Dexametasona/uso terapêutico , Glucocorticoides/uso terapêutico , Sêmen , Neoplasias Testiculares/complicações , Neoplasias Testiculares/tratamento farmacológico , Adulto
5.
Polymers (Basel) ; 15(24)2023 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-38139964

RESUMO

In this work, a plant-based resin gel polymer electrolyte (GPE) was prepared by stereolithography (SLA) 3D printing. Lithium perchlorate (LiClO4) with a concentration between 0 wt.% and 25 wt.% was added into the plant-based resin to observe its influence on electrical and structural characteristics. Fourier transform infrared spectroscopy (FTIR) analysis showed shifts in the carbonyl, ester, and amine groups, proving that complexation between the polymer and LiClO4 had occurred. GPEs with a 20 wt.% LiClO4 (S20) showed the highest room temperature conductivity of 3.05 × 10-3 S cm-1 due to the highest number of free ions as determined from FTIR deconvolution. The mobility of free ions in S20 electrolytes was also the highest due to greater micropore formation, as observed via field emission scanning electron microscopy (FESEM) images. Transference number measurements suggest that ionic mobility plays a pivotal role in influencing the conductivity of S20 electrolytes. Based on this work, it can be concluded that the plant-based resin GPE with LiClO4 is suitable for future electrochemical applications.

6.
Foods ; 12(21)2023 Oct 25.
Artigo em Inglês | MEDLINE | ID: mdl-37959023

RESUMO

In the current study, whey protein-based nanofibers were fabricated to encapsulate Lactobacillus rhamnosus. Purposely, different ratios of PVA (polyvinyl alcohol) and WPI (whey protein isolate) were blended to fabricate nanofibers. Nanofiber mats were characterized in terms of particle size, diameter, tensile strength, elongation at break, and loading efficiency. Morphological and molecular characterizations were carried out using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR). Moreover, in vitro viability under simulated gastrointestinal (GI) conditions and thermal stability were also assessed. The results reveal that by increasing the PVA concentration, the conductivity increased while the viscosity decreased. SEM micrographs showed that probiotics were successfully loaded within the nanofiber. The FTIR spectra show strong bonding between the encapsulating materials with the addition of probiotics. In vitro and thermal analyses revealed that the survival of encapsulated probiotics significantly (p < 0.05) improved. In a nutshell, PVA-WPI composite nanofibers have promising potential when used to enhance the viability and stability of probiotics under adverse conditions.

7.
Indian J Microbiol ; 63(3): 244-252, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37781004

RESUMO

The art of utilizing and manipulating micro materials have been dated back to antient era. With the advancement in technologies, the state-of-art methods of nano technologies and nano sciences has been employed in various sectors including environment, product designing, food industry, pharmaceuticals industries to way out solve standard problem of mankind. Due to rapid industrialization and the alarming levels of pollution there has been an urgent need to address the environmental and energy issues. Environmental sustainability concerns the global climate change and pollution including air, water, soil. The field of nanotechnology has proven to be a promising field where sensing and remediation, have been dramatically advanced by the use of nanomaterials. This emergent science of surface to mass ratio is the principle theorem for manipulating structure at molecular levels. The review sums up all the advancements in the field of nanotechnology and their recent application in the environment. New opportunities and challenges have also been discussed in detail to understand the use of nanotechnology as problem-to-solution ratio. Graphical abstract: Image depicting the application of nanotechnology in environmental concerns. The combinations of technologies like bioremediations, bioaugmentations with state-of-the-art nanotechnology like carbon nanotubes and Nano capsules to answer the environmental challenges of soil quality, and plant productivity.

8.
Pak J Med Sci ; 39(5): 1361-1365, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37680821

RESUMO

Objectives: To compare the efficacy of topical Nepafenac 0.1 % and Diclofenac 0.1% eye drops in reducing the aqueous cells in the anterior chamber in an un-eventful post cataract surgery. Methods: This prospective, clinical trial was conducted at an Eye OPD of Qazi Hussain Ahmad Medical Complex, Nowshera from January till December 2021. Ophthalmic assessment included Visual acuity (VA), slit-lamp examination, Intraocular pressure (IOP), Central macular thickness (CMT) by Optical coherence tomography (OCT) and anterior chamber-aqueous cells measurement pre-operatively and at day 1st, 2nd, 4th and 8th week post-operatively. Patients were randomly allocated to topical diclofenac 0.1% (TD) four times a day and nepafenac 0.1% (TN) three times a day for four weeks each along with topical steroids and antibiotics. Results: Seventy patients (70) were randomly distributed into two treatment arms of 35 each. In both the arms VA improved which achieved a level of statistical significance post-operatively, however statistically insignificant difference was observed between the groups at 8th week follow up visit (p= 0.62). However, IOP and CMT values didn't achieve statistical significance between the arms pre and post operatively. In TN arm, level of AC-cells at 2nd and 4th week post-operatively were significantly lower (10.54 ± 4.05 and 08.20 ± 4.44) than TD arm (11.28 ± 5.04 and 09. 66 ± 5.50) with statistically significant difference (p < 0.05). Conclusions: Topical Nepafenac 0.1% was more effective in suppressing the anterior chamber inflammation as compared to diclofenac during the early few post-operative weeks.

9.
Prog Biophys Mol Biol ; 184: 13-31, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37666284

RESUMO

Chemical signal molecules are used by bacteria to interact with one another. Small hormone-like molecules known as autoinducers are produced, released, detected, and responded to during chemical communication. Quorum Sensing (QS) is the word for this procedure; it allows bacterial populations to communicate and coordinate group behavior. Several research has been conducted on using inhibitors to prevent QS and minimize the detrimental consequences. Through the enzymatic breakdown of the autoinducer component, by preventing the formation of autoinducers, or by blocking their reception by adding some compounds (inhibitors) that can mimic the autoinducers, a technique known as "quorum quenching" (QQ) disrupts microbial communication. Numerous techniques, including colorimetry, electrochemistry, bioluminescence, chemiluminescence, fluorescence, chromatography-mass spectroscopy, and many more, can be used to test QS/QQ. They all permit quantitative and qualitative measurements of QS/QQ molecules. The mechanism of QS and QQ, as well as the use of QQ in the prevention of biofilms, are all elaborated upon in this writing, along with the fundamental study of nanoparticle (NP)in QQ. Q.

10.
Iran J Public Health ; 52(6): 1199-1206, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37484147

RESUMO

Background: Breast cancer is the most common malignancy among women worldwide. We aimed to know the past trends of age-specific breast cancer incidence rates in Faisalabad city. Methods: A retrospective study was designed at Allied Hospital Faisalabad (AHF), Pakistan from 2014-2018. Overall, 12742 cancer patients presented throughout these years, out of which 3390 were breast cancer cases. Descriptive statistics were computed and the results were presented as counts and percentage for categorical variables. Means and standard errors were computed for the continuous variables. For testing the association among categorical variables, a chi-square test of independence was used and the p-values less than 0.05 are reported as significant. Results: 84.70% patients were diagnosed with invasive breast carcinoma and 15.30% were all other types reported in the Allied Hospital Faisalabad. The incidence of breast cancer was outrageous in the 40-49 year-old age group (1021 patients, 30.12%) and the mean age is 45 in all years. An increase of 34.86% was observed from 2014 to 2018. The comprehensive four-year data (2015 to 2018) were further analyzed for histology, surgery, staging and grading pattern as 2014 files data was insufficient to discuss. The stage III and grade III were most common throughout the years from 2015 to 2018 with 33.9% and 55.71% respectively. Conclusion: Breast cancer is diagnosed more commonly in women than in any other type of cancers in Faisalabad city. There is a need to upgrade the existing hospital facilities to make the women diagnose the cancer at an earlier stage.

11.
J Pak Med Assoc ; 73(5): 995-999, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-37218224

RESUMO

Objective: To assess the efficacy of topical azithromycin drops versus oral doxycycline therapy in meibomian gland dysfunction. METHODS: The prospective randomised trial was conducted from December 2019 to June 2020 at the Qazi Hussain Ahmad Medical Complex, Nowshera, Pakistan, and comprised patients of either gender aged 26-42 years having long-standing posterior blepharitis / meibomian gland dysfunction. The subjects were randomised into two equal groups. Both the groups were advised to do warm compresses and lid massage three times a day for 5 min. each for 4 weeks. In addition, group A received azithromycin 1% drops 2 times/day for 1 week, followed by once a day for 3 weeks, while group B received oral doxycycline 100mg once a day for 4 weeks. Baseline, midstream at 2 weeks and post-intervention status, including subjective symptoms, were compared. RESULTS: Of the 60 subjects enrolled, there were 30(50%) in each of the two groups; 32(53.3%) males and 28(46.4%) females. While all 30(100%) the participants in group A completed the trial without any adverse reaction to medication, 8(26.7%) in group B quit midstream owing to anorexia/nausea and gastrointestinal discomfort. Compared to baseline, reduction in both subjective and objective features of the disease in both groups were noted regardless of gender (p=0.08). No significant difference was evident in symptoms healing rate and improvement in foreign body sensation between the groups (p>0.05). Group A treatment improved eye redness, while group B proved better in respect of meibomian glands obstruction healing and corneal staining p<0.05). Conclusion: Both topical azithromycin and oral doxycycline were effective and had their own edge as far as symptomatic improvement was concerned in the treatment of meibomian gland dysfunction.


Assuntos
Azitromicina , Disfunção da Glândula Tarsal , Masculino , Feminino , Humanos , Azitromicina/uso terapêutico , Doxiciclina/uso terapêutico , Antibacterianos/uso terapêutico , Disfunção da Glândula Tarsal/tratamento farmacológico , Estudos Prospectivos , Resultado do Tratamento , Lágrimas
12.
Nanomaterials (Basel) ; 13(7)2023 Mar 23.
Artigo em Inglês | MEDLINE | ID: mdl-37049240

RESUMO

Nanoscale surface roughness has conventionally been induced by using complicated approaches; however, the homogeneity of superhydrophobic surface and hazardous pollutants continue to have existing challenges that require a solution. As a prospective solution, a novel bubbled-structured silica nanoparticle (SiO2) decorated electrospun polyurethane (PU) nanofibrous membrane (SiO2@PU-NFs) was prepared through a synchronized electrospinning and electrospraying process. The SiO2@PU-NFs nanofibrous membrane exhibited a nanoscale hierarchical surface roughness, attributed to excellent superhydrophobicity. The SiO2@PU-NFs membrane had an optimized fiber diameter of 394 ± 105 nm and was fabricated with a 25 kV applied voltage, 18% PU concentration, 20 cm spinning distance, and 6% SiO2 nanoparticles. The resulting membrane exhibited a water contact angle of 155.23°. Moreover, the developed membrane attributed excellent mechanical properties (14.22 MPa tensile modulus, 134.5% elongation, and 57.12 kPa hydrostatic pressure). The composite nanofibrous membrane also offered good breathability characteristics (with an air permeability of 70.63 mm/s and a water vapor permeability of 4167 g/m2/day). In addition, the proposed composite nanofibrous membrane showed a significant water/oil separation efficiency of 99.98, 99.97, and 99.98% against the water/xylene, water/n-hexane, and water/toluene mixers. When exposed to severe mechanical stresses and chemicals, the composite nanofibrous membrane sustained its superhydrophobic quality (WCA greater than 155.23°) up to 50 abrasion, bending, and stretching cycles. Consequently, this composite structure could be a good alternative for various functional applications.

13.
Polymers (Basel) ; 15(8)2023 Apr 12.
Artigo em Inglês | MEDLINE | ID: mdl-37111996

RESUMO

Today, additive manufacturing (AM) is considered one of the vital tenets of the industry 4.0 revolution due to its high productivity, decentralized production and rapid prototyping. This work aims to study the mechanical and structural properties of polyhydroxybutyrate as an additive in blend materials and its potential in medical applications. PHB/PUA blend resins were formulated with 0 wt.%, 6 wt.%, 12 wt.% and 18 wt.% of PHB concentration. Stereolithography or an SLA 3D printing technique were used to evaluate the printability of the PHB/PUA blend resins. Additionally, from FESEM analysis, a change was observed in PUA's microstructure, with an additional number of voids spotted. Furthermore, from XRD analysis, as PHB concentration increased, the crystallinity index (CI) also increased. This indicates the brittleness properties of the materials, which correlated to the weak performance of the tensile and impact properties. Next, the effect of PHB loading concentration within PHB/PUA blends and aging duration towards the mechanical performance of tensile and impact properties was also studied by using analysis of variance (ANOVA) with a two-way method. Finally, 12 wt.% of PHB/PUA was selected to 3D print the finger splint due to its characteristics, which are compatible to be used in finger bone fracture recovery.

14.
Membranes (Basel) ; 13(2)2023 Jan 26.
Artigo em Inglês | MEDLINE | ID: mdl-36837659

RESUMO

Nanofiber-based facial masks have attracted the attention of modern cosmetic applications due to their controlled drug release, biocompatibility, and better efficiency. In this work, Azadirachta indica extract (AI) incorporated electrospun polyvinyl alcohol (PVA) nanofiber membrane was prepared to obtain a sustainable and hydrophilic facial mask. The electrospun AI incorporated PVA nanofiber membranes were characterized by scanning electron microscope, Ultraviolet-visible spectroscopy (UV-Vis) drug release, water absorption analysis, 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging, and antibacterial activity (qualitative and quantitative) at different PVA and AI concentrations. The optimized nanofiber of 376 ± 75 nm diameter was obtained at 8 wt/wt% PVA concentration and 100% AI extract. The AI nanoparticles of size range 50~250 nm in the extract were examined through a zeta sizer. The water absorption rate of ~660% and 17.24° water contact angle shows good hydrophilic nature and water absorbency of the nanofiber membrane. The UV-Vis also analyzed fast drug release of >70% in 5 min. The prepared membrane also exhibits 99.9% antibacterial activity against Staphylococcus aureus and has 79% antioxidant activity. Moreover, the membrane also had good mechanical properties (tensile strength 1.67 N, elongation 48%) and breathability (air permeability 15.24 mm/s). AI-incorporated nanofiber membrane can effectively be used for facial mask application.

15.
J Ayub Med Coll Abbottabad ; 35(1): 164-168, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36849401

RESUMO

Intra-vitreal Vancomycin (IV-V) and ceftazidime (IV-C) are commonly in the treatment of acute post operative endophthalmitis. But there are suboptimal responses in some cases due to the emergence of antibiotic resistant micro-organisms. Moxifloxacin is a wide range antibacterial drug that is available as an eye drops for topical use for different types of ocular infections including post-operative endophthalmitis. But it has not been explored extensively as an intra-vitreal drug for post-operative endophthalmitis. We unveiled its broad spectrum anti-bacterial properties by giving it as an intra-vitreal route of delivery so to see its efficacy in post-operative endophthalmitis case. A 65 years old diabetic male presented with acute painful loss of vision in his right eye 2 days following his cataract extraction with posterior chamber intraocular lens implantation (PC IOL). His visual acuity (VA) on presentation was just counting finger close to eye. Slim lamp examination (SLE) revealed swollen lids, discharge in the inferior conjunctival fornix, conjunctival redness and chemosis, hazy cornea, fibrinous exudate in AC along with hypopyon, there was marked vitritis with yellowish fundal glow apparent. The patient was injected with intra-vitreal moxifloxacin 0.5mg/0.2 ml, along with topical and oral antibiotics in combination with steroids. VA reached to 6/24 and follow-up at 4th week didn't show any of intra ocular inflammatory changes on SLE. Intra-vitreal moxifloxacin mono-therapy is a better substitute to combination of vancomycin and ceftazidime due to its broad-spectrum coverage in acute post-operative endophthalmitis.


Assuntos
Doenças do Tecido Conjuntivo , Endoftalmite , Idoso , Humanos , Masculino , Antibacterianos/uso terapêutico , Ceftazidima , Endoftalmite/tratamento farmacológico , Endoftalmite/etiologia , Moxifloxacina , Vancomicina/uso terapêutico
16.
Comput Med Imaging Graph ; 103: 102151, 2023 01.
Artigo em Inglês | MEDLINE | ID: mdl-36502764

RESUMO

Artifacts are a common occurrence in Diffusion MRI (dMRI) scans. Identifying and removing them is essential to ensure the accuracy and viability of any post-processing carried out on these scans. This makes quality control (QC) a crucial first step prior to any analysis of dMRI data. Several QC methods for artifact detection exist, however they suffer from problems like requiring manual intervention and the inability to generalize across different artifacts and datasets. In this paper, we propose an automated deep learning (DL) pipeline that utilizes a 3D-Densenet architecture to train a model on diffusion volumes for automatic artifact detection. Our method is validated on 9000 volumes sourced from 7 large clinical datasets spanning different acquisition protocols (with different gradient directions, high and low b-values, single-shell and multi-shell acquisitions) from multiple scanners. Additionally, they represent diverse subject demographics including age, sex and the presence or absence of pathologies. Our QC method is found to accurately generalize across this heterogenous data by correctly detecting 92% artifacts on average across our test set. This consistent performance over diverse datasets underlines the generalizability of our method, which currently is a significant barrier hindering the widespread adoption of automated QC techniques. Thus, 3D-QCNet can be integrated into diffusion pipelines to effectively automate the arduous and time-intensive process of artifact detection.


Assuntos
Artefatos , Imagem de Difusão por Ressonância Magnética , Imagem de Difusão por Ressonância Magnética/métodos , Imageamento por Ressonância Magnética/métodos , Controle de Qualidade , Processamento de Imagem Assistida por Computador/métodos , Encéfalo
17.
Cureus ; 15(12): e50902, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38249242

RESUMO

Masson's tumor, also named intravascular papillary endothelial hyperplasia (IPEH), is a rare, benign vascular tumor. Evaluation by clinical features can be confused with other soft tissue tumors. Therefore, the diagnosis should be confirmed by histopathological examination. The patient reported here is 67 years old and came to us with a small painful lesion over the left thumb of about two months duration. Histopathological examination was consistent with Masson's tumor (IPEH) following excisional biopsy, with good functional outcomes. To the best of our knowledge, this is the first report of this entity from Kuwait. Dermatologists and surgeons should know about this rare entity and its unusual presentation, to be able to distinguish it from similar presenting serious conditions, especially angiosarcoma. Through this report, we purport to facilitate recognition of this condition apart from some other conditions it may mimic.

18.
Membranes (Basel) ; 12(12)2022 Dec 05.
Artigo em Inglês | MEDLINE | ID: mdl-36557137

RESUMO

Sweat is a natural body excretion produced by skin glands, and the body cools itself by releasing salty sweat. Wetness in the underarms and feet for long durations causes itchiness and an unpleasant smell. Skin-friendly reusable sweat pads could be used to absorb sweat. Transportation of moisture and functionality is the current challenge that many researchers are working on. This study aims to develop a functional and breathable sweat pad with antimicrobial and quick drying performance. Three layered functional sweat pads (FSP) are prepared in which the inner layer is made of an optimized needle-punched coolmax/polypropylene nonwoven blend. This layer is then dipped in antimicrobial ZnO solution (2, 4, and 6 wt.%), and super absorbent polymer (SAP) is embedded, and this is called a functional nonwoven (FNW1) sheet. Electrospun nanofiber-based nanomembranes of polyamide-6 are optimized for bead-free fibers. They are used as a middle layer to enhance the pad's functionality, and the third layer is again made of needle-punched optimized coolmax/polypropylene nonwoven sheets. A simple nonwoven-based sweat pad (SSP) is also prepared for comparison purposes. Nonwoven sheets are optimized based on better comfort properties, including air/water vapor permeability and moisture management (MMT). Nonwoven webs having a higher proportion of coolmax show better air permeability and moisture transfer from the inner to the outer layer. Antimicrobial activity of the functional nonwoven layer showed 8 mm of bacterial growth, but SSP and FSP showed only 6 mm of growth against Staphylococcus aureus. FSP showed superior comfort and antibacterial properties. This study could be a footstone toward highly functional sweat pads with remarkable comfort properties.

19.
Membranes (Basel) ; 12(11)2022 Nov 16.
Artigo em Inglês | MEDLINE | ID: mdl-36422140

RESUMO

Synthetic antibiotics have captured the market in recent years, but the side effects of these products are life-threatening. In recent times, researchers have focused their research on natural-based products such as natural herbal oils, which are eco-friendly, biocompatible, biodegradable, and antibacterial. In this study, polyethylene oxide (PEO) and aqueous ginger extract (GE) were electrospun to produce novel antibacterial nanomembrane sheets as a function of PEO and GE concentrations. A GE average particle size of 91.16 nm was achieved with an extensive filtration process, inferring their incorporation in the PEO nanofibres. The presence of the GE was confirmed by Fourier transform infrared spectroscopy (FTIR) through peaks of phenol and aromatic groups. The viscoelastic properties of PEO/GE solutions were analysed in terms of PEO and GE concentrations. Increasing PEO and GE concentrations increased the solution's viscosity. The dynamic viscosity of 3% was not changed with increasing shear rate, indicating Newtonian fluid behaviour. The dynamic viscosity of 4 and 5 wt% PEO/GE solutions containing 10% GE increased exponentially compared to 3 wt%. In addition, the shear thinning behaviour was observed over a frequency range of 0.05 to 100 rad/s. Scanning Electron Microscopy (SEM) analysis also specified an increase in the nanofibre's diameter with increasing PEO concentration, while SEM images displayed smooth morphology with beadless nanofibres at different PEO/GE concentrations. In addition, PEO/GE nanomembranes inhibited the growth of Staphylococcus aureus, as presented by qualitative antibacterial results. The extent of PEO/GE nanomembrane's antibacterial activity was further investigated by the agar dilution method, which inhibited the 98.79% Staphylococcus aureus population at 30% GE concentration.

20.
Membranes (Basel) ; 12(11)2022 Nov 17.
Artigo em Inglês | MEDLINE | ID: mdl-36422150

RESUMO

Textile-supported nanocomposite as a scaffold has been extensively used in the medical field, mainly to give support to weak or harmed tissues. However, there are some challenges in fabricating the nanofiber/textile composite, i.e., suitable porous structure with defined pore size, less skin contact area, biocompatibility, and availability of degradable materials. Herein, polyamide-6 (PA) nanofibers were synthesized using needleless electrospinning with the toothed wheel as a spinneret. The electrospinning process was optimized using different process and solution parameters. In the next phase, optimized PA nanofiber membranes of optimum fiber diameter with uniform distribution and thickness were used in making nanofiber membrane-textile composite. Different textile fabrics (woven, non-woven, knitted) were developed. The optimized nanofiber membranes were combined with non-woven, woven, and knitted fabrics to make fabric-supported nanocomposite. The nanofiber/fabric composites were compared with available market woven and knitted meshes for mechanical properties, morphology, structure, and chemical interaction analysis. It was found that the tear strength of the nanofiber/woven composite was three times higher than market woven mesh, and the nanofiber/knitted composite was 2.5 times higher than market knitted mesh. The developed composite structures with woven and knitted fabric exhibited improved bursting strength (613.1 and 751.1 Kpa), tensile strength (195.76 and 227.85 N), and puncture resistance (68.76 and 57.47 N), respectively, than market available meshes. All these properties showed that PA nanofibers/textile structures could be utilized as a composite with multifunctional properties.

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