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Journal articles on the topic 'L-PRF membranes'

Author: Grafiati

Published: 4 September 2021

Last updated: 29 July 2025

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1

Lara, Cesar, Alejandro Bezmalinovic, Claudio García-Herrera, Susana Ríos, Loreto M. Valenzuela, and Constanza E. Martínez. "Leukocyte- and Platelet-Rich Fibrin (L-PRF) Obtained from Smokers and Nonsmokers Shows a Similar Uniaxial Tensile Response In Vitro." Biomedicines 11, no. 12 (2023): 3286. http://dx.doi.org/10.3390/biomedicines11123286.

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We evaluated and compared the biomechanical properties of Leukocyte-and Platelet Rich Fibrin L-PRF clots and membranes derived from smoker and nonsmoker donors. Twenty venous-blood donors (aged 18 to 50 years) were included after signing informed consent forms. L-PRF clots were analyzed and then compressed to obtain L-PRF membranes. L-PRF clot and membrane samples were tested in quasi-static uniaxial tension and the stress–stretch response was registered and characterized. Furthermore, scanning electron microscope representative images were taken to see the fibrin structure from both groups. T

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Khorshidi, Hooman, Saeed Raoofi, Rafat Bagheri, and Hodasadat Banihashemi. "Comparison of the Mechanical Properties of Early Leukocyte- and Platelet-Rich Fibrin versus PRGF/Endoret Membranes." International Journal of Dentistry 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/1849207.

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Objectives. The mechanical properties of membranes are important factors in the success of treatment and clinical handling. The goal of this study was to compare the mechanical properties of early leukocyte- and platelet-rich fibrin (L-PRF) versus PRGF/Endoret membrane.Materials and Methods.In this experimental study, membranes were obtained from 10 healthy male volunteers. After obtaining 20 cc venous blood from each volunteer, 10 cc was used to prepare early L-PRF (group 1) and the rest was used to get a membrane by PRGF-Endoret system (group 2). Tensile loads were applied to specimens using

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Palmeira Esteves Schleinstein, Camilla, André Carlos de Freitas, Viviane Palmeira da Silva, Naiadja De Santana Cerqueira, Maria Cristina Teixeira Cangussu, and Luciana Maria Pedreira Ramalho. "CHARACTERIZATION OF PHYSICAL AND CELLULAR PROPERTIES OF MEMBRANES OF L-PRF PRODUCED BY DIFFERENT CENTRIFUGES/ CENTRIFUGATION PROTOCOLS." Brazilian Journal of Implantology and Health Sciences 6, no. 1 (2024): 1773–90. http://dx.doi.org/10.36557/2674-8169.2024v6n1p1773-1790.

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Leukocyte and platelet-rich fibrin (L-PRF), an essential source of cytokines and growth factors, has been widely used to regulate the healing process. The quality of the L-PRF obtained is dependent on technical factors and the centrifugation protocol used. Thus, the present study aimed to macro and microscopically evaluate the formation of the L-PRF membrane/clot in two centrifuge models and protocols recommended by manufacturers. Four blood samples from 8 healthy volunteers undergoing rehabilitation surgery with dental implants were used. In group 1 of the Montserrat centrifuge (model 80-2B 1

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Serafini, Giorgio, Marco Lollobrigida, Lorenzo Fortunato, et al. "Postextractive Alveolar Ridge Preservation Using L-PRF: Clinical and Histological Evaluation." Case Reports in Dentistry 2020 (June 12, 2020): 1–6. http://dx.doi.org/10.1155/2020/5073519.

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Leukocyte- and platelet-rich fibrin (L-PRF) is an autologous platelet concentrate rich in growth factors and plasma proteins, obtained by centrifugation of patient whole blood, and widely used in oral surgery. This report describes a case of alveolar ridge preservation with L-PRF membranes. Postextractive alveolar healing was then assessed through a histologic and histomorphometric analysis. A patient requiring tooth extraction and subsequent implant rehabilitation was treated with simple extraction and socket filling with L-PRF membranes. Implant placement was performed at 3 months, and a bon

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5

Simões-Pedro, Mara, Pedro Maria B. P. S. Tróia, Nuno Bernardo Malta dos Santos, António M. G. Completo, Rogerio Moraes Castilho, and Gustavo Vicentis de Oliveira Fernandes. "Tensile Strength Essay Comparing Three Different Platelet-Rich Fibrin Membranes (L-PRF, A-PRF, and A-PRF+): A Mechanical and Structural In Vitro Evaluation." Polymers 14, no. 7 (2022): 1392. http://dx.doi.org/10.3390/polym14071392.

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Predictable outcomes intended by the application of PRF (platelet-rich fibrin) derivative membranes have created a lack of consideration for their consistency and functional integrity. This study aimed to compare the mechanical properties through tensile strength and analyze the structural organization among the membranes produced by L-PRF (leukocyte platelet-rich fibrin), A-PRF (advanced platelet-rich fibrin), and A-PRF+ (advanced platelet-rich fibrin plus) (original protocols) that varied in centrifugation speed and time. L-PRF (n = 12), A-PRF (n = 19), and A-PRF+ (n = 13) membranes were sub

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Aragosa, Federica, Gerardo Fatone, Chiara Caterino, et al. "Evaluation of the Effects of Autologous Leukocyte- and Platelet-Rich Fibrin Membranes for Treating Chronic Wounds: A Prospective Study." Animals 15, no. 1 (2025): 112. https://doi.org/10.3390/ani15010112.

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(1) Background: The aim of this prospective study was to evaluate the efficacy of topical application of leukocyte- and platelet-rich fibrin (L-PRF) membranes for treating chronic cutaneous wounds in dogs. (2) Methods: Chronic wounds unresponsive to conventional treatments were assessed on digital photographs and classified using the Bates-Jensen Wound Assessment Tool (BWAT). Each lesion was treated with L-PRF membranes. Epithelialization, granulation tissue formation, wound healing rate, and contraction were statistically analyzed during follow-up. (3) Results: All but one of the cases were t

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Francisco, Inês, Francisco Vale, Victor Martin, Maria Helena Fernandes, and Pedro Sousa Gomes. "From Blood to Bone—The Osteogenic Activity of L-PRF Membranes on the Ex Vivo Embryonic Chick Femur Development Model." Materials 14, no. 24 (2021): 7830. http://dx.doi.org/10.3390/ma14247830.

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(1) Background: To evaluate the effects of the direct and indirect contact of leukocyte and platelet-rich fibrin (L-PRF) on bone development, in an ex vivo embryonic chick femur model. (2) Methods: Both sections of L-PRF membranes (red and yellow portions) were evaluated with scanning electron microscopy and histochemical staining. The in vivo angiogenic activity was evaluated using a chorioallantoic membrane model. The osteogenic activity was assessed with an organotypic culture of embryonic chick femora through direct and indirect contact, and assessment was conducted by microtomographic and

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8

Perussolo, José Maurício, Mhárllon Rutyna Santos, Jeferson Luis de Oliveira Stroparo, et al. "Use of platelet- and leukocyte-rich fibrin (l-prf) in bisphosphonate-related osteonecrosis of the jaw (bronj) in rats - split-mouth study." Conjecturas 22, no. 8 (2022): 74–87. http://dx.doi.org/10.53660/conj-1125-s11.

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This study aimed to clinically evaluate the effect of platelet- and leukocyte-rich fibrin (L-PRF) membranes in preventing bisphosphonate-related osteonecrosis of the jaw (BRONJ) in rats. In this study, twelve Wistar rats (six males and six females) were used. A split-mouth study was performed; the right-side was used as treatment, with treatment of platelet- and leukocyte-rich fibrin membranes (L-PRF group, LPRFG), and the left-side received no intervention as control (control group, CG). The rats received intravenous Zolendronate (Zol) (80 ug/kg/week) injections during nine weeks to induce th

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Sousa, Leandro Lécio de Lima, Daiane Fermino Brunale, Gustavo Vicentis Oliveira Fernandes, Gabriela Giro, and Marcelo de Faveri. "A Comparison of the Dimensional Characteristics and Plasma Parameters of Different Centrifuges Used for the Preparation of Autologous Platelet Concentrates: A Randomized Correlational Study." Materials 18, no. 2 (2025): 414. https://doi.org/10.3390/ma18020414.

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Objective: The objective of this study was to evaluate autologous platelet-rich fibrin (PRF) membrane weights and measurements after production by different centrifuges. Moreover, the values obtained with blood cellular components were correlated. Methods: Twelve systemically healthy participants underwent dental implant surgery associated with PRF membranes as the graft biomaterial at the implant site. Prior to the surgical procedure, the chosen participants underwent blood count and coagulogram tests and presented on the surgical day. Nine tubes containing 10 mL of venous blood were collecte

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MOHAMMED, Jiyar. "Efficacy of Platelet Rich Fibrin on Angiogenesis." Journal of Duhok University 23, no. 1 (2020): 172–77. http://dx.doi.org/10.26682/csjuod.2020.23.1.18.

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In this experiment we used platelet-rich fibrin (L-PRF) with the protocol of its production, in this study we tried to investigate the angiogenetic efficacy of L-PRF on s soft tissue. Blood samples of 8 sheep were used to establish the protocol of the L-PRF formation to develop the work. The mucoperiosteal flaps were filled with autologous L-PRF in the mandible and maxillary jaws of the sheep. Samples taken from the surgical sites stained with haematoxylin and eosin for diagnosis of the sections, then immunohistological tests were confirmed on these sections. We noticed that after 14 days of m

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Gummaluri, Shiva Shankar, Hirak S. Bhattacharya, Madhusudan Astekar, and Shivani Cheruvu. "Evaluation of titanium-prepared platelet-rich fibrin and leucocyteplatelet-rich fibrin in the treatment of intra-bony defects: Arandomized clinical trial." Journal of Dental Research, Dental Clinics, Dental Prospects 14, no. 2 (2020): 83–91. http://dx.doi.org/10.34172/joddd.2020.020.

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Background. Various treatment modalities, such as leucocyte platelet-rich fibrin (L-PRF), bone grafts,and membranes, have been used for the restoration of lost periodontal tissues. Titanium-preparedplatelet-rich fibrin (T-PRF) has attracted attention for its proper haemocompatibility, thick fibrinmeshwork, and long resorption time. The present study aimed to evaluate the effectiveness of T-PRFand L-PRF in the management of intra-bony defects based on clinical and radiographic criteria. Methods. Twenty-six subjects with 34 intra-bony 3- walled defects were divided into two groups (n=17)and trea

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SESSENTA JUNIOR, Claudio Freire, Maria Carmen Pereira SILVA, Kariana Wan-Dall GONÇALVES, et al. "SURGICAL TREATMENT OF OSTEORADIONECROSIS ASSOCIATED WITH L-PRF MEMBRANES: CASE REPORT." Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology 137, no. 6 (2024): e256-e257. http://dx.doi.org/10.1016/j.oooo.2023.12.525.

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Brilhante, Felipe Vilhena, Rodolfo José Gomes De Araújo, Ana Catarina Nunes Tavares, et al. "Guided bone regeneration associated with L-PRF vertical bone gain: a case report." Journal of Research in Dentistry 4, no. 6 (2017): 162. http://dx.doi.org/10.19177/jrd.v4e62016162-166.

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Every day have been increased the number of patients in the dental office looking for oral reabilitações, many of them being a challenge to the dentist surgeon. Currently, implants are installed on guided bone regeneration, the use of membranes, titanium threads and bone substitutes are key parts for correcting bone defects and to support the implant. Thereunto, the aim of this study was the description of a case addressing the methods and materials used for guided bone regeneration with the use of L-PRF for vertical bone gain. The patient showed the absence of the elements 22, 23 and 24, and

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Ponte, Jose Sandro, Alberto Tadeu da Frota Nogueira, Jacques Antonio Cavalcante Maciel, and Igor Iuco Castro-Silva. "Guided bone regeneration in the anterior maxilla after tooth extraction and implant removal with sticky bone and L-PRF membrane in two surgical approaches." Research, Society and Development 10, no. 11 (2021): e112101119456. http://dx.doi.org/10.33448/rsd-v10i11.19456.

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The main requirement for the insertion of dental implants is a good bone and gum condition and guided bone regeneration (GBR) combines grafts and membranes to increase such parameters in tissue deficiencies and thus achieve treatment success. This clinical case reports the oral rehabilitation of the anterosuperior area by the association of bone graft, autologous membrane and implantodontic therapy. Female patient, 45 years old, normosystemic, reported aesthetic complaint and implant mobility in the maxilla. Upon clinical and radiographic examination, an implant was diagnosed in the region of

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Ríos, Susana, Lina Gabriela González, Claudia Gilda Saez, Patricio Cristian Smith, Lina M. Escobar, and Constanza Eugenia Martínez. "L-PRF Secretome from Both Smokers/Nonsmokers Stimulates Angiogenesis and Osteoblast Differentiation In Vitro." Biomedicines 12, no. 4 (2024): 874. http://dx.doi.org/10.3390/biomedicines12040874.

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Leukocyte and Platelet-Rich Fibrin (L-PRF) is part of the second generation of platelet-concentrates. L-PRF derived from nonsmokers has been used in surgical procedures, with its beneficial effects in wound healing being proven to stimulate biological activities such as cell proliferation, angiogenesis, and differentiation. Cigarette smoking exerts detrimental effects on tissue healing and is associated with post-surgical complications; however, evidence about the biological effects of L-PRF derived from smokers is limited. This study evaluated the impact of L-PRF secretome (LPRFS) derived fro

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Fredes, Felipe, Jaime Pinto, Nelson Pinto, et al. "Potential Effect of Leukocyte-Platelet-Rich Fibrin in Bone Healing of Skull Base: A Pilot Study." International Journal of Otolaryngology 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/1231870.

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Background. Reconstruction of surgical defects following cranial base surgery is challenging. Others have demonstrated that leukocyte-platelet-rich fibrin (L-PRF) stimulates tissue healing and bone regeneration. However, these studies have addressed mostly maxillofacial surgical wounds. Objective. The objective of this study was to assess the possible adjuvant role of L-PRF in inducing neoossification of the surgical bone defect in anterior skull base surgery. Methods. We identified patients who had undergone an endoscopic endonasal surgery of the anterior skull base in which L-PRF membranes w

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Balice, Giuseppe, Michele Paolantonio, Paolo De Ninis, et al. "Treatment of Unfavorable Intrabony Defects with Autogenous Bone Graft in Combination with Leukocyte- and Platelet-Rich Fibrin or Collagen Membranes: A Non-Inferiority Study." Medicina 60, no. 7 (2024): 1091. http://dx.doi.org/10.3390/medicina60071091.

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Background and Objectives: Unfavorable intrabony defects (IBDs) are associated with the progression of periodontal disease and tooth loss. Growing scientific evidence has demonstrated the effectiveness of platelet concentrations in periodontal treatment. The aim of our study was to demonstrate the non-inferiority of an autogenous bone graft (ABG) associated with leukocyte- and platelet-rich fibrin (L-PRF) compared to ABG + Collagen Membrane in the treatment of IBDs. Material and Methods: Sixty-four patients with at least one IBD were randomly assigned to two groups: ABG+L-PRF and CM+ABG. Clini

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Sehgal, Manoti, Lovleen Puri, Sapna Yadav, et al. "Immediate Dental Implants Enriched with L-PRF in the Esthetic Zone." Case Reports in Dentistry 2018 (December 3, 2018): 1–6. http://dx.doi.org/10.1155/2018/9867402.

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The aim of this article is to present the clinical application of immediate implant placement with L-PRF and immediate prosthetic loading in anterior esthetic region. A 24-year-old healthy female patient reported with a chief complaint of poor esthetics in the upper front tooth region with retained deciduous teeth. On oral examination, there were retained deciduous teeth (52, 53, and 63) with congenitally missing permanent successors. The retained deciduous teeth were extracted, and immediate implant placement was done in the extraction sockets along with L-PRF membranes in one surgical sessio

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Lourenço, Emanuelle Stellet, Neilane Rodrigues Santiago Rocha, Renata de Lima Barbosa, et al. "Investigating the Biological Efficacy of Albumin-Enriched Platelet-Rich Fibrin (Alb-PRF): A Study on Cytokine Dynamics and Osteoblast Behavior." International Journal of Molecular Sciences 25, no. 21 (2024): 11531. http://dx.doi.org/10.3390/ijms252111531.

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The development of effective biomaterials for tissue regeneration has led to the exploration of blood derivatives such as leucocyte- and platelet-rich fibrin (L-PRF). A novel variant, Albumin-Enriched Platelet-Rich Fibrin (Alb-PRF), has been introduced to improve structural stability and bioactivity, making it a promising candidate for bone regeneration. This study aimed to evaluate Alb-PRF’s capacity for cytokine and growth factor release, along with its effects on the proliferation, differentiation, and mineralization of human osteoblasts in vitro. Alb-PRF membranes were analyzed using histo

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Lollobrigida, Marco, Manuela Maritato, Giuseppina Bozzuto, Giuseppe Formisano, Agnese Molinari, and Alberto De Biase. "Biomimetic Implant Surface Functionalization with Liquid L-PRF Products: In Vitro Study." BioMed Research International 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/9031435.

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Objective. Platelet-rich fibrin (PRF) clots and membranes are autologous blood concentrates widely used in oral surgical procedures; less is known, however, about the liquid formulations of such products. The aim of this in vitro study is to assess the behavior of different implant surfaces when in contact with two liquid leucocyte- and platelet-rich fibrin (L-PRF) products.Methods. Six commercial pure titanium discs, of 9.5 mm diameter and 1.5 mm thickness, were used. Three of these samples had a micro/nano-rough surface; three were machined. Three different protocols were tested. Protocols i

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Su, Chen-Yao. "How to optimize the preparation of leukocyte- and platelet-rich fibrin (L-PRF, Choukroun technique) clots and membranes: Introducing the PRF Box." Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 110, no. 3 (2010): 278–80. http://dx.doi.org/10.1016/j.tripleo.2010.05.047.

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Ehrenfest, David M. Dohan. "How to optimize the preparation of leukocyte- and platelet-rich fibrin (L-PRF, Choukroun's technique) clots and membranes: Introducing the PRF Box." Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 110, no. 3 (2010): 275–78. http://dx.doi.org/10.1016/j.tripleo.2010.05.048.

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Ardila, Carlos M., María Pertuz, and Annie Marcela Vivares-Builes. "Clinical Efficacy of Platelet Derivatives in Periodontal Tissue Regeneration: An Umbrella Review." International Journal of Dentistry 2023 (July 3, 2023): 1–15. http://dx.doi.org/10.1155/2023/1099013.

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Objectives. This umbrella review aimed to consolidate the best available evidence regarding the clinical efficacy of platelet derivatives in the treatment of periodontal defects associated with periodontitis and in the management of mucogingival deformities. Materials and Methods. The “umbrella review” strategy was used to identify systematic reviews and meta-analyses. The search was performed without language restrictions and updated at the end of February 2023. The PubMed and Scopus databases, together with gray literature, were included in the search. Results. The search yielded 412 studies

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Balice, Giuseppe, Michele Paolantonio, Matteo Serroni, et al. "Treatment of Multiple RT1 Gingival Recessions Using a Coronally Advanced Flap Associated with L-PRF or Subgingival Connective Tissue Graft from Maxillary Tuberosity: A Randomized, Controlled Clinical Trial." Dentistry Journal 12, no. 4 (2024): 86. http://dx.doi.org/10.3390/dj12040086.

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The goal of plastic periodontal surgery is to obtain complete root coverage, increasing gingival thickness (GT), a positive prognostic factor for gingival margin stability over time. The aim of this study was to compare the effectiveness of the Coronally Advanced Flap (CAF) in RT1 (GR; gingival recession with no loss of interproximal attachment) when associated with a connective tissue graft from the maxillary tuberosity (tCTG) or with leukocyte and platelet-rich fibrin (L-PRF) membranes in obtaining root coverage and increasing the thickness and width of the keratinized tissue, along with aes

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Khorshidi, Hooman, Pardis Haddadi, Saeed Raoofi, Parisa Badiee, and Ali Dehghani Nazhvani. "Does Adding Silver Nanoparticles to Leukocyte- and Platelet-Rich Fibrin Improve Its Properties?" BioMed Research International 2018 (May 27, 2018): 1–5. http://dx.doi.org/10.1155/2018/8515829.

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Objectives. Leucocyte- and platelet-rich fibrin (L-PRF) membrane can be used in various regenerative treatments. In the case of classical heterologous membrane exposure, microorganisms can be colonized on it and jeopardize the success of treatment. The aim of this study was to compare the antibacterial, mechanical, and histologic characteristics of the L-PRF membrane before and after the addition of silver nanoparticles (SNP). Materials and Method. This study was performed on 10 volunteer men aged 25-35 years. 20 ml whole bloods were collected from each person and L-PRFs were made by routine a

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Spencer, P., S. Domingos, B. Edwards, et al. "Ozone enhanced ceramic membrane filtration for wastewater recycling." Water Practice and Technology 14, no. 2 (2019): 331–40. http://dx.doi.org/10.2166/wpt.2019.017.

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Abstract The Water Corporation of Western Australia uses polymeric ultrafiltration (UF) membranes across a range of applications including surface waters with high natural organic matter (NOM), recycling of secondary treated wastewater and pre-treatment for seawater reverse osmosis (SWRO). These challenging raw water conditions require expensive chemical dosing and clean-in-place (CIP) regimes, high frequency of membrane replacement and reduced membrane life. The greater durability of ceramic membranes, with optimal ozone and coagulant dosing, offer a potential capital and operating advantage

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Zhou, Qibo, Qibing Chang, Yao Lu, and Jing Sun. "Mussel-Inspired Construction of Silica-Decorated Ceramic Membranes for Oil–Water Separation." Ceramics 7, no. 1 (2024): 250–63. http://dx.doi.org/10.3390/ceramics7010016.

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In recent years, ceramic membranes have received widespread focus in the area of liquid separation because of their high permeability, strong hydrophilicity, and good chemical stability. However, in practical applications, the surface of ceramic membranes is prone to be contaminated, which degrades the permeation flux of ceramic membranes during the separation process. Inspired by mussels, we imitate the biomimetic mineralization process to prepare a ceramic membrane of nano–silica on the pre-modified zirconia surface by co-deposited polydopamine/polyethyleneimine. The modified ceramic membran

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Roubaud, Emma, William Maréchal, Olivier Lorain, et al. "Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO2 Hollow-Fiber Membrane." Membranes 12, no. 5 (2022): 538. http://dx.doi.org/10.3390/membranes12050538.

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In the context of designing a photocatalytic self-cleaning/low-fouling membrane, the stability of PVDF-PVP-TiO2 hollow-fiber membranes under UV irradiation has been studied. The effect of irradiation power, aqueous environment composition and fouling state on the properties of the membranes has been investigated. With this aim, SEM observations, chemical analysis and tensile strength measurements have been conducted. The results indicate that pristine membranes that undergo UV irradiation in ultra-pure water are significantly degraded due to attacks of OH° radicals. However, when methylene blu

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Yousefi, Mehran, Mohsen Abbasi, Mohammad Akrami, and Mika Sillanpää. "Pre-Treatment and Turbidity Reduction of Sea Waters Using New Composite Ceramic Microfiltration Membranes with Iron Oxide Additive." Water 14, no. 21 (2022): 3475. http://dx.doi.org/10.3390/w14213475.

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In this research, an experimental study was carried out on the pre-treatment and turbidity removal of Persian Gulf water using cross flow microfiltration by new composite ceramic membranes. Three types of tubular microfiltration composite ceramic membranes that consisted of Mullite, Mullite/SiC, and Mullite/SiC/Fe2O3 with different compositions were fabricated at relatively low temperature (1250 °C) with extrusion and sintering for this purpose. Furthermore, changes in porosity, pore size, and mechanical strength were compared in Mullite membranes and composite membranes to find the most suita

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Liu, Jianing, Liang Duan, Qiusheng Gao, Yang Zhao, and Fu Gao. "Removal of Typical PPCPs by Reverse Osmosis Membranes: Optimization of Treatment Process by Factorial Design." Membranes 13, no. 3 (2023): 355. http://dx.doi.org/10.3390/membranes13030355.

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In this paper, the removal effect of reverse osmosis (RO) on three common pharmaceuticals and personal care products (PPCPs), including ibuprofen (IBU), carbamazepine (CBZ), and triclosan (TCS), were compared under different process conditions, and the removal rate of PPCPs, membrane flux, and PPCPs membrane adsorption capacity were analyzed. The removal rate increased with the increase of the influent concentration and pre-membrane pressure, while pH influenced the removal effect of different PPCPs by affecting the electrostatic interaction between pollutants and membranes. It was also found

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Abror, M. R., S. Laksono, and S. Adityosulindro. "Comparative analysis of performance and fouling characteristics of microfiltration and ultrafiltration polycarbonate membrane." IOP Conference Series: Earth and Environmental Science 1263, no. 1 (2023): 012058. http://dx.doi.org/10.1088/1755-1315/1263/1/012058.

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Abstract Seawater Reverse Osmosis is the most popular desalination technology for providing clean water. However, several problems in SWRO operations occurs, namely the decrease in membrane performance due to fouling. Fouling on the membrane is generally caused by high salinity and organic content in seawater. Therefore, pre-treatment technology is needed to improve water quality and reduce the workload of SWRO. This study aims to determine the suitable pre-treatment technology, by examining the removal efficiency of parameters in water using Ultrafiltration and microfiltration membranes. In t

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Mänttäri, M., and M. Nyström. "Ultrafiltration and nanofiltration in the pulp and paper industry using cross-rotational (CR) filters." Water Science and Technology 50, no. 3 (2004): 229–38. http://dx.doi.org/10.2166/wst.2004.0200.

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Ultra- and nanofiltration with high shear CR-filters have been utilized for cleaning of clear filtrates and effluents from the pulp and paper industry. The aim was to find out how different nanofiltration membranes operate at high shear conditions. The filtration efficiency of the membranes was evaluated by measuring flux, retention and fouling at various recovery and pH conditions. High fluxes (∼100 L/(m2h)) for nanofiltration membranes were measured when circulation waters from the paper machine were filtered at neutral conditions. In the filtration of discharge of external activated sludge

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Huang, J. Y., S. Takizawa, and K. Fujita. "Pilot-plant study of a high recovery membrane filtration process for drinking water treatment." Water Science and Technology 41, no. 10-11 (2000): 77–84. http://dx.doi.org/10.2166/wst.2000.0613.

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Successful application of energy efficient dead-end micro-filtration (MF), which does not require recirculation like cross-flow filtration, depends on achieving high recovery rates. In this study, two different types of pilot scale membrane systems (horizontally and vertically stretched membrane filters) were evaluated based on the effects of pre-chlorination, intermittent chlorination and circulation flow by air-scrubbing. Additionally, the effects of operating factors including physical cleaning and chemical cleaning on membrane fouling were examined. The vertically stretched membranes showe

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Chang-jiang, Liu, Zheng Zhou-lian, He Xiao-ting, et al. "L-P Perturbation Solution of Nonlinear Free Vibration of Prestressed Orthotropic Membrane in Large Amplitude." Mathematical Problems in Engineering 2010 (2010): 1–17. http://dx.doi.org/10.1155/2010/561364.

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This paper reviewed the research on the nonlinear free vibration of pre-stressed orthotropic membrane, which is commonly applied in building membrane structures. We applied the L-P perturbation method to solve the governing equations of large amplitude nonlinear free vibration of rectangular orthotropic membranes and obtained a simple approximate analytical solution of the frequency and displacement function of large amplitude nonlinear free vibration of rectangular membrane with four edges simply supported. By giving computational examples, we compared and analyzed the frequency results. In a

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Lubis, Mirna, Wahyu Rinaldi, Suraiya Kamaruzzaman, and Umi Fathanah. "The effect of polyvinylpirrolidone on the performance of polyvinylidene fluoride membranes." Acta Periodica Technologica, no. 53 (2022): 11–24. http://dx.doi.org/10.2298/apt2253011l.

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In this investigation, polyvinylidene fluoride membranes were resulted by a phase inversion technique with polyvinylpyrrolidone (PVP) as an agent to form pores, as well as n-methyl pyrrolidone as a solvent. In addition, the effect of PVP concentration (1-4%) was investigated to prepare membranes with better membrane antifouling performance and characteristics. Furthermore, functional groups, morphological structures, and membrane porosity were analysed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and membrane porosity calculation. The surface SEM image

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Laksono, Sucipta, Irwan Irwan, and Sandyanto Adityosulindro. "Analysis the Effect of Flux and Water Characteristics on Polyethersulfone Ultrafiltration Membrane Performance as Pre-Treatment of SWRO." Jurnal Ilmu Lingkungan 22, no. 4 (2024): 836–44. http://dx.doi.org/10.14710/jil.22.4.836-844.

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Increasing human population resulted in higher demand for potable freshwater, while freshwater sources were limited. As an alternative solution, seawater was necessarily to be employed as a main source of water supply and necessarily treated with Seawater Reverse Osmosis (SWRO). However, membrane fouling of SWRO was occurred. Therefore, implementation of ultrafiltration membranes as pre-treatment were necessary. In this study, identification of removal efficiency seawater characteristics of TDS, COD, conductivity, and UV-Vis parameters at different flux and investigation of the fouling rate at

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Mi, Yi-Fang, Jia-Li Liu, Wen Xia, Shu-Heng He, and Bao-Qing Shentu. "In Situ Formation of Silver Nanoparticles Induced by Cl-Doped Carbon Quantum Dots for Enhanced Separation and Antibacterial Performance of Nanofiltration Membrane." Membranes 13, no. 8 (2023): 693. http://dx.doi.org/10.3390/membranes13080693.

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Polyamide (PA) nanofiltration (NF) membranes suffer from biofouling, which will deteriorate their separation performance. In this study, we proposed a strategy to incorporate silver nanoparticles (Ag NPs) into PA NF membranes in situ, in order to simultaneously enhance water permeability and antibacterial performance. The chloride-doped carbon quantum dots (Cl-CQDs) with photocatalytic performance were pre-embedded in the PA selective layer. Under visible light irradiation, the photogenerated charge carriers generated by Cl-CQDs rapidly transported to silver ions (Ag+ ions), resulting in the i

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Fujioka, Takahiro, Kha Nguyen, Anh Hoang, et al. "Biofouling Mitigation by Chloramination during Forward Osmosis Filtration of Wastewater." International Journal of Environmental Research and Public Health 15, no. 10 (2018): 2124. http://dx.doi.org/10.3390/ijerph15102124.

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Pre-concentration is essential for energy and resource recovery from municipal wastewater. The potential of forward osmosis (FO) membranes to pre-concentrate wastewater for subsequent biogas production has been demonstrated, although biofouling has also emerged as a prominent challenge. This study, using a cellulose triacetate FO membrane, shows that chloramination of wastewater in the feed solution at 3–8 mg/L residual monochloramine significantly reduces membrane biofouling. During a 96-h pre-concentration, flux in the chloraminated FO system decreased by only 6% and this flux decline is mos

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Laabs, C., G. Amy, and M. Jekel. "Organic colloids and their influence on low-pressure membrane filtration." Water Science and Technology 50, no. 12 (2004): 311–16. http://dx.doi.org/10.2166/wst.2004.0728.

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Wastewater treatment by low-pressure membrane filtration (MF and UF) is affected to a large extent by macromolecules and colloids. In order to investigate the influence of organic colloids on the membrane filtration process, colloids were isolated from a wastewater treatment plant effluent using a rotaryevaporation pre-concentration step followed by dialysis. Stirred cell tests were carried out using redissolved colloids, with and without additional glass fiber filtration. After constant pressure membrane filtration of 190 L/m2, the initial flux had declined by 50% for colloids &gt; 6-8 kD

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Rukapan, Weerapong, Benyapa Khananthai, Chart Chiemchaisri, Wilai Chiemchaisri, and Thirdpong Srisukphun. "Short- and long-term fouling characteristics of reverse osmosis membrane at full scale leachate treatment plant." Water Science and Technology 65, no. 1 (2012): 127–34. http://dx.doi.org/10.2166/wst.2011.844.

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This research is focused on characterizing the foulants on a reverse osmosis (RO) membrane taken from a full-scale leachate treatment plant in Thailand. The system consists of a physico-chemical pre-treatment unit and RO system and has been in operation for 2 years. Ferric chloride (FeCl3) was added to the open-jet sedimentation tank at 2.0–2.5 g/l dosage for chemical coagulation. The supernatant from the sedimentation tank was polished using a pressurized sand filter prior to entering the RO system. The RO unit consists of seven pressurized vessels and 42 membrane elements (6 elements in each

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Lee, Iksu, Seungbin Kim, Dongjun Lee, Daeun Kim, and Insung Bae. "Dipole Polarization-Induced High Proton Conduction and Aligned Molecular Structures of Nafion Blend Membranes with PVDF and PVDF-Trfe for Enhanced Pemfcs." ECS Meeting Abstracts MA2024-02, no. 43 (2024): 2916. https://doi.org/10.1149/ma2024-02432916mtgabs.

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Proton exchange membrane fuel cells (PEMFCs) have emerged as promising energy generation solutions in various applications, owing to their eco-friendly operation. Perfluorosulfonated polymers like Nafion and Aquivion are preferred choices for PEMs due to their high proton conductivity and excellent stability. However, the bicontinuous structure of Nafion membranes limits proton conductivity, necessitating strategies for enhancement. Methods such as mechanical stretching and magnetic field alignment have been explored to align PEM nanostructures. Mechanically stretched Nafion membranes exhibit

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Mariñas, B. J. "Reverse Osmosis Technology for Wastewater Reuse." Water Science and Technology 24, no. 9 (1991): 215–27. http://dx.doi.org/10.2166/wst.1991.0251.

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Reverse osmosis technology has a great potential in the field of wastewater reclamation. A reverse osmosis plant includes the following processes: (1) feed water microfiltration and chemical conditioning, (2) membrane treatment, (3) permeate aeration, neutralization and disinfection, and (4) concentrate (liquid residue) treatment and disposal. The performance of reverse osmosis membranes depends on operating conditions and water quality parameters. Permeate productivity and contaminant removals increase with applied hydraulic pressure. Water quality parameters such as concentration, compositio

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Sudrajat, Nandang, Bimanda Rizki Nurhidayat, Oggy Satriya Putra, Rozalina Loebis, and Ismi Zuhria. "Relation between Blood Parameters and Platelet-Rich Fibrin Membrane Size for Ocular Graft." NeuroQuantology 20, no. 4 (2022): 454–59. http://dx.doi.org/10.14704/nq.2022.20.4.nq22258.

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Purpose: To investigate the relationship between blood parameters and platelet-rich fibrin (PRF) membrane size for ocular graft. Methods: Total of 12 New Zealand white rabbits, 6.5 ml of blood samples was taken for each rabbit, including 5 ml for platelet-rich fibrin membrane production using L-PRF protocol (centrifugation at 2700 rpm for 12 minutes) 1.5 ml for evaluation of blood parameters. Measurement of blood parameters consists of fibrinogen, haemoglobin, hematocrit, red blood cell (RBC), white blood cell (WBC) and platelet. Measurement of the platelet-rich fibrin membrane area was done u

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Girundi, Ana Luíza Gonçalves, Francisco Mauro da Silva Girundi, Rodrigo Porto Guimarães, Vinícius Rodrigues Santos, and Wander José da Silva. "Implicações clínicas do uso do L-PRF em cirurgias orais." Full Dentistry in Science 12, no. 46 (2021): 81–87. http://dx.doi.org/10.24077/2021;1246-8187.

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The autologous blood concentrate L-PRF is responsible for the healing response in surgical procedures. However, studies results are inconclusive. Therefore, the aim of this article was to collect existing literature’s evidence concerning the clinical implications of L-PRF use in oral surgeries such as maxillary sinus lift, alveolus filling after dental extractions, and dental implants. Pubmed database was assessed and randomized clinical trials between 2006 and 2019 considering the clinical implications of L-PRF use in oral surgeries were included. A hundred and seventy articles were identifie

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Gulsever, Serap, and Sina Uckan. "Enhanced Palatal Wound Healing with Leucocyte- and Platelet-Rich Fibrin After Free Gingival Graft Harvesting: A Prospective Randomized Controlled Clinical Trial." Journal of Clinical Medicine 14, no. 3 (2025): 1029. https://doi.org/10.3390/jcm14031029.

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Background/Objectives: Autogenous palatal free gingival graft (FGG) harvesting presents challenges for patients due to the increased risk of postoperative morbidity related to a second intraoral surgical wound that heals with secondary intention. This parallel-group, randomized, controlled, open-label trial aimed to evaluate the efficacy of the application of leukocyte- and platelet-rich fibrin (L-PRF) membrane to the palatal donor site on wound healing, hemostasis, and pain control after FGG harvesting. Methods: Twenty-eight adult patients with insufficient attached gingiva underwent soft tis

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Dang, H. T. T., H. D. Tran, S. H. Tran, M. Sasakawa, and R. M. Narbaitz. "Treatment and reuse of coalmine wastewater in Vietnam: application of microfiltration." Water Quality Research Journal 53, no. 3 (2018): 133–42. http://dx.doi.org/10.2166/wqrj.2018.028.

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Abstract Due to stringent local regulations and adverse environmental impacts, Vietnamese coal mining industries are under pressure to reuse the large volume of wastewater they produce. To this end, the aim of this study was to add microfiltration (MF) membranes after the conventional Vietnamese coalmine wastewater treatment systems (coagulation/sedimentation/filtration) to assess the feasibility of effluent reuse. The pilot-scale test was performed at a coalmine plant located in Quang Ninh province, Vietnam. Results indicate that precipitation with slaked lime (Ca(OH)2) and polyaluminum chlor

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Amina Tahreen, Mohammed Saedi Jami, Fathilah Ali, NIK RASHIDA NIK ABDUL GHANI, and Radhia Nedjai. "INVESTIGATION OF ENHANCED ELECTROCOAGULATION-MEMBRANE PROCESS FOR WATER RECLAMATION FROM PALM OIL MILL EFFLUENTS." IIUM Engineering Journal 25, no. 1 (2024): 12–25. http://dx.doi.org/10.31436/iiumej.v25i1.2629.

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The process of electrocoagulation (EC) enhanced with adsorbent addition, as a pre-treatment for ultrafiltration membrane, is widely unexplored in oil palm-based wastewater treatment. Utilizing predetermined EC operational parameters and a defined activated carbon (AC) dosage for biotreated palm oil mill effluents (BPOME), membrane fouling was studied during crossflow membrane filtration at 0.5 bar transmembrane pressure and 1 kDa membrane pore size. The dominant fouling mechanism in membrane filtration without EC-AC pretreatment of BPOME, was cake formation, which was determined through Hermia

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Mauceri, Rodolfo, Denise Murgia, Orazio Cicero, et al. "Leucocyte- and Platelet-Rich Fibrin Block: Its Use for the Treatment of a Large Cyst with Implant-Based Rehabilitation." Medicina 57, no. 2 (2021): 180. http://dx.doi.org/10.3390/medicina57020180.

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The management of critical-size bone defects is still demanding. Recently, autologous platelet concentrates in combination with bone substitute have been applied and reported in a few studies. Our aim is to report the healing of a critical-size alveolar bone defect treated with a new bone regeneration technique by means of L-PRF and L-PRF blocks. A 45-year-old woman presented a large cystic lesion; the extraction of three teeth, a cyst removal procedure, and bone regeneration procedures with L-PRF and L-PRF blocks were planned. The L-PRF block was prepared by mixing a bone substitute with a pi

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Mera, Stefany, Catalina Rodriguez, Cindy Villamarin, et al. "Use of L-PRF in intrabone defects in patients with advanced stages of periodontitis." Odontología Sanmarquina 26, no. 4 (2023): e24640. http://dx.doi.org/10.15381/os.v26i4.24640.

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Objetivo: El propósito de este estudio fue observar el efecto del uso de L-PRF en defectos infraoseos de pacientes con periodontitis en estadios avanzados. Métodos: Se incluyeron 32 defectos infraoseos de 12 pacientes con diagnóstico de Periodontitis estadio III y IV (Workshop 2018). Se realizó raspaje a campo abierto con colocación de membrana de L-PRF. Se incluyeron defectos infraóseos de 1-2-3 paredes y cráter óseo. Se registró la profundidad de sondaje (PS), nivel de inserción clínica (NIC), índice de placa (IP) e índice de sangrado (IS). Se realizaron radiografías periapicale digitales an

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Abd Halim, Nur Syakinah, Mohd Dzul Hakim Wirzal, Muhammad Roil Bilad, et al. "Electrospun Nylon 6,6/ZIF-8 Nanofiber Membrane for Produced Water Filtration." Water 11, no. 10 (2019): 2111. http://dx.doi.org/10.3390/w11102111.

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This study develops electrospun nylon 6,6 nanofiber membrane (NFM), incorporating zeolitic imidazolate framework-8 (ZIF-8) as the additive for produced water (PW) filtration. Electrospun NFM is suitable to be used as a filter, especially for water treatment, since it has a huge surface area to volume ratio, high porosity, and great permeability compared to the conventional membranes. These properties also enhance its competitiveness to be used as reverse osmosis pre-treatment, as the final stage of PW treatment water reuse purpose. However, the fouling issue and low mechanical strength of NFM

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