Journal articles: 'Mmmies'

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Haymond, Jeff. "Are MMMFs money?" Quarterly Journal of Austrian Economics 3, no. 4 (December 2000): 53–68. http://dx.doi.org/10.1007/s12113-000-1026-0.

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Malueka, Rusdy Ghazali, Andrianor Rahman, Ery Kus Dwianignsih, Andre Stefanus Panggabean, Halwan Fuad Bayuangga, Sarastiti Alifaningdyah, Meutia Rizki Innayah, et al. "Blood Cholinesterase Level is Associated with Cognitive Function in Indonesian School-age Children Exposed to Pesticides." Open Access Macedonian Journal of Medical Sciences 8, E (April 25, 2020): 81–86. http://dx.doi.org/10.3889/oamjms.2020.3985.

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BACKGROUND: Pesticides are known as depressors of acetylcholinesterase (AChE) activity, resulting in the nervous system toxicity. The previous studies have described associations between AChE, a stable marker of pesticide poisoning, and cognitive performance in children. AIM: This study aimed to identify the association between blood AChE level and cognitive function in children exposed to pesticides in the Magelang Regency, Indonesia. METHODS: A cross-sectional study involving school-age children with a history of pesticide exposure in Ngablak, Magelang Regency, Central Java, Indonesia, was conducted. Blood AChE level was evaluated, and the Modified Mini–Mental State Examination for Children (MMMSEC) was used to analyze the cognitive function of the children. RESULTS: In total, 56 subjects aged between 9 and 11 years were included in this study. Median blood AChE level was 9.64 kIU/L, and 24 subjects (42.9%) had low blood AChE levels. Median MMMSEC score was 33. Eleven subjects (19.6%) were found to have abnormal cognitive function. Bivariate analysis showed that blood AChE level was associated with MMMSEC score (r = 0.343, p = 0.010). Multiple linear regression showed that blood AChE level had a positive association with cognitive function in children, assessed using the MMMSEC score (β = 0.360; p = 0.006). Further analysis showed that the attention and orientation (memory function) domains of the MMMSEC were significantly associated with blood AChE level (β: 0.371 and 0.297, respectively, p < 0.05). CONCLUSIONS: Blood AChE level, a stable marker of pesticide poisoning, was positively associated with cognitive function in children, as assessed using the MMMSEC score. In particular, the orientation and attention domains of the MMMSEC were associated with blood AChE level.

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Cui, Yan, Liuwen Huang, Tingting Huo, Faqin Dong, Guojun Wang, and Qingbi Zhang. "Man-made mineral fiber effects on the expression of anti-oncogenes P53 and P16 and oncogenes C-JUN and C-FOS in the lung tissue of Wistar rats." Toxicology and Industrial Health 35, no. 6 (May 26, 2019): 431–44. http://dx.doi.org/10.1177/0748233719851699.

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Man-made mineral fibers (MMMFs) are substitutes for asbestos. MMMFs are widely used as insulation, but their molecular mechanisms underlying the tumorigenic effects in vivo have been poorly studied. For this reason, this work aimed to explore the properties and carcinogenic molecular mechanisms of MMMFs. The three MMMFs, rock wool (RW), glass fibers (GFs), and ceramic fibers (CFs), were prepared into respirable dust. Particle size, morphology, and chemical composition were analyzed by laser particle analyzer, scanning electron microscope, and X-ray fluorescence spectrometer, respectively. The Wistar rats were administered multiple intratracheal instillations of three MMMFs once a month. Then, several parameters (e.g. body mass, lung mass, and lung histology) were measured at 1, 3, and 6 months. After that, levels of P53, P16, C-JUN, and C-FOS mRNA and protein were measured by quantitative real-time reverse transcription polymerase chain reaction and Western blotting. This work found that exposure to MMMFs could influence the growth of body mass and increase lung mass. General conditions showed white nodules and irregular atrophy. In addition, MMMFs could lead to inactivation of anti-oncogene P16 and activation of proto-oncogenes (C-JUN and C-FOS) in the mRNA and protein levels, in which GF and CF were more obvious compared with RW. The effect of MMMFs was different, which may be related to the physical and chemical characteristics of different MMMFs. In conclusion, MMMFs (GF and CF) could induce an unbalanced expression of cancer-related genes in the lung tissues of rats. The understanding of the determinants of toxicity and carcinogenicity provides a scientific basis for developing and introducing new safer MMMF products, and the present study provides some useful insights into the carcinogenic mechanism of MMMFs.

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Li, Zhi, and Zhao Liang Jiang. "Multi-Objective Optimization of Multi-Mixed-Model Assembly Lines Sequencing Problem." Applied Mechanics and Materials 321-324 (June 2013): 2110–15. http://dx.doi.org/10.4028/www.scientific.net/amm.321-324.2110.

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Multi-mixed model assembly lines (MMMALs) sequencing cooperative optimization is a typical problem that a variety of products models are assembled in multiple assembly lines. It extends the traditional products sequencing from MMAL to MMMALs. In this paper, we pose products assembly sequencing in multi-mixed model assembly lines (MMMALs) as a multiple-objective optimization problem with the objectives to minimize consumption waviness of each material in the lines, total setup cost and finished product inventory cost. The multi-objective optimization algorithm based on NSGAII is designed. Computational experiment has been demonstrated to the applicability of using NSGAII to solve the problem and effectiveness of the proposed approach. By means of this research, the valid solutions for products assembly sequence can be offered to the decision makers effectively.

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Thursina, Cempaka, Sri Sutarni, RA Yayi Suryo Prabandari, Retno Sutomo, Carla Raymondalexas Machira, and Alfi Rizky Medikanto. "HUBUNGAN INTERNET GAMING DISORDER DENGAN GANGGUAN ATENSI DAN MEMORI PADA SISWA SMP DI DAERAH PERDESAAN DI YOGYAKARTA." Callosum Neurology 4, no. 1 (April 30, 2021): 1–5. http://dx.doi.org/10.29342/cnj.v4i1.94.

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Latar belakang: Internet gaming merupakan kejadian yang merambak dan menjadi hal yang lazim di seluruh dunia. Seiring itu pula, timbul keresahan terkait internet gaming, yaitu peningkatan jumlah gamers yang teradiksi. Maka dari itu, penelitian ini dlakukan untuk mengenal internet gaming disorderi(IGD) terutama di daerah perdesaan di Yogyakarta. Modified Children Mini Mental Status Examination(MMMSEC) merupakan alat ukur yang dipakai dalam pengukuran fungsi kognitif maupun atensi pada anak-anak. Tujuan Penelitian: Untuk mengetahui hubungan antara nilai MMMSEC bagian atensi, dan memori dengan IGD pada siswa SMP di daerah perdesaan, Yogyakarta Metode Penelitian: Metode menggunakan studi potong lintang di sejumlah SMP di daerah perdesaan Bantul, Yogyakarta pada Mei-Juni 2019. Subyek penelitian kemudian dilakukan assessment terhadap kejadian IGD, dan setelah itu dilanjutkan dengan assessment. Didapatkan total 74 subyek penelitian dengan 37 subyek dengan IGD, dan 37 merupakan subyek kontrol. Hasil: Prevalensi dari siswa SMP yang terkena IGD yaitu 8.2% di daerah perdesaan di Yogyakartan,. Terdapat 74 subyek penelitian, sebanyak 64.9% laki-laki dan 35.1% perempuan. Analisis non parametrik dengan Mann-Whitney hasil MMMSEC antara IGD dan kontrol mendapatkan hasil yang bermakna di penilaian atensi (p value =0.00), dan nilai total (p value=0.029), sedangkan pada penilaian orientasi, registrasi, recall dan bahasa tidak didapatkan hasil yang bermakna. Hasil analisist terhadap perbedaan nilai MMSMEC pada jenis kelamin tidak mendapatkan hasil yang bermakna. Simpulan: Terdapat hubungan antara nilai MMSMEC pada bagian atensi, dan total dengan IGD pada siswa SMP di perdesaan Yogyakarta. Kata Kunci: Internet Gaming Disorder, IGD, MMMSEC, Atensi, Memori

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Lin, Jingxia, and Jeeyoung Peck. "The syntax–semantics interface of multi-morpheme motion constructions in Chinese." Studies in Language 35, no. 2 (September 30, 2011): 337–79. http://dx.doi.org/10.1075/sl.35.2.04lin.

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This study analyzes semantic constraints affecting the order of motion morphemes in Mandarin Chinese multi-morpheme motion constructions (MMMCs, e.g. zǒu-jìn fángjiān ‘walk into the room’ (lit.) ‘walk-enter room’ vs. *jìn-zǒu (lit.) ‘enter-walk’). We classify Chinese motion morphemes into four types based on recent study on “scale structure”. Then, we propose an implicational scalar hierarchy formed by the four types of morphemes that can be used to predict the order of motion morphemes in Chinese MMMCs. Our corpus studies demonstrate that the hierarchy can explain the morpheme order of MMMCs for a comprehensive range of existing natural Chinese data. We anticipate that our scalar hierarchy may be extensible to serial-verb motion constructions in other languages as well.

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Lim, B. J., J. W. Kim, W. I. Yang, and N. H. Cho. "Malignant mixed müllerian tumor of fallopian tube with multiple distinct heterologous components." International Journal of Gynecologic Cancer 14, no. 4 (2004): 690–93. http://dx.doi.org/10.1136/ijgc-00009577-200407000-00021.

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We experienced a case of primary malignant mixed müllerian tumors (MMMTs) of the fallopian tube of FIGO stage I. In addition to endometrioid adenocarcinomas, multiple apparent heterologous elements encompassing myxoid chondrosarcoma, osteosarcoma, myxoid liposarcoma, and well-differentiated angiosarcoma were recognized separately in each nodule. Those findings that divergent sarcomatoid differentiations are apparently present masquerading malignant mesenchymoma have not been described in MMMTs of the female genital tract.

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Whiting, Cathleen. "Persistence of regulatory innovation: MMMFs and financial intermediaries." Journal of Economic Behavior & Organization 23, no. 3 (May 1994): 321–42. http://dx.doi.org/10.1016/0167-2681(94)90005-1.

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Fatoye, Femi O., Morenikeji A. Komolafe, Benjamin A. Eegunranti, Abiodun O. Adewuya, Samuel K. Mosaku, and Grace K. Fatoye. "Cognitive Impairment and Quality of Life among Stroke Survivors in Nigeria." Psychological Reports 100, no. 3 (June 2007): 876–82. http://dx.doi.org/10.2466/pr0.100.3.876-882.

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The study investigated cognitive impairment and quality of life (QOL) among 109 consecutive stroke survivors and 109 normal controls. Each group comprised 64 (58.7%) men and 45 (41.3%) women. The modified Mini Mental State Examination (mMMSE) and the WHO Quality of Life Questionnaire (WHOQOL-Bréf) indicated that 19 (17.4%) stroke survivors had cognitive deficits (mMMSE score < 16) compared with 5 (4.6%) control participants (χ12 = 4.27, p<.05). Control participants performed significantly better on orientation, language comprehension, laterality, and the WHOQOL-Bréf. Being GHQ-30 positive predicted poor performance on the mMMSE among the stroke survivors and reduced QOL on three of the four domains of the WHOQOL-Bréf. In addition, previous psychiatric illness, paresis, low education, and shorter time elapsed after a stroke predicted reduced QOL on one or more domains of the WHOQOL-Bréf but age and sex of the stroke survivors were not associated with quality of life, and not with cognitive function.

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Rahmani, Mohammadreza, Abbass Kazemi, and Farid Talebnia. "Matrimid mixed matrix membranes for enhanced CO2/CH4 separation." Journal of Polymer Engineering 36, no. 5 (July 1, 2016): 499–511. http://dx.doi.org/10.1515/polyeng-2015-0176.

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Abstract In this study, Matrimid mixed matrix membranes (MMMs) were prepared for CO2/CH4 separation. MMMs were fabricated for improving the permeability and ideal selectivity of Matrimid membranes. Matrimid 5218 was used as a polymer matrix, and inorganic particles were used as additives. MMMs with a thickness of 33–38 μm were prepared at room temperature. The effects of the types and different amounts of additives on the permeability and ideal selectivity of MMMs were investigated by using a gas separation membrane unit. Scanning electron microscopy and atomic force microscopy images were used for checking the dispersion and agglomeration of additives within polymer matrices. Thermal gravimetric analysis showed that MMMs became much more thermally stable than pristine membranes. The decomposition temperatures (Td) of MMMs were increased as compared to those of pristine membranes. The results of Fourier transform infrared spectroscopy analysis of MMMs and pristine membranes were recorded. The tensile strength of MMMs and pristine membranes was studied, and the results indicated that MMMs had higher values of tensile strength compared to pristine membranes.

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Anbealagan, Lanisha Devi, Tiffany Yit Siew Ng, Thiam Leng Chew, Yin Fong Yeong, Siew Chun Low, Yit Thai Ong, Chii-Dong Ho, and Zeinab Abbas Jawad. "Modified Zeolite/Polysulfone Mixed Matrix Membrane for Enhanced CO2/CH4 Separation." Membranes 11, no. 8 (August 16, 2021): 630. http://dx.doi.org/10.3390/membranes11080630.

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In recent years, mixed matrix membranes (MMMs) have received worldwide attention for their potential to offer superior gas permeation and separation performance involving CO2 and CH4. However, fabricating defect-free MMMs still remains as a challenge where the incorporation of fillers into MMMs has usually led to some issues including formation of undesirable interfacial voids, which may jeopardize the gas separation performance of the MMMs. This current work investigated the incorporation of zeolite RHO and silane-modified zeolite RHO (NH2–RHO) into polysulfone (PSf) based MMMs with the primary aim of enhancing the membrane’s gas permeation and separation performance. The synthesized zeolite RHO, NH2–RHO, and fabricated membranes were characterized by X-ray diffraction (XRD) analysis, Fourier transform infrared-attenuated total reflection (FTIR-ATR), thermogravimetric analysis (TGA) and field emission scanning election microscopy (FESEM). The effects of zeolite loading in the MMMs on the CO2/CH4 separation performance were investigated. By incorporating 1 wt% of zeolite RHO into the MMMs, the CO2 permeability and ideal CO2/CH4 selectivity slightly increased by 4.2% and 2.7%, respectively, compared to that of a pristine PSf membrane. On the other hand, a significant enhancement of 45% in ideal CO2/CH4 selectivity was attained by MMMs incorporated with 2 wt% of zeolite NH2-RHO compared to a pristine PSf membrane. Besides, all MMMs incorporated with zeolite NH2-RHO displayed higher ideal CO2/CH4 selectivity than that of the MMMs incorporated with zeolite RHO. By incorporating 1–3 wt% zeolite NH2-RHO into PSf matrix, MMMs without interfacial voids were successfully fabricated. Consequently, significant enhancement in ideal CO2/CH4 selectivity was enabled by the incorporation of zeolite NH2–RHO into MMMs.

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Anjum, Tanzila, Rahma Tamime, and Asim Laeeq Khan. "Mixed-Matrix Membranes Comprising of Polysulfone and Porous UiO-66, Zeolite 4A, and Their Combination: Preparation, Removal of Humic Acid, and Antifouling Properties." Membranes 10, no. 12 (December 4, 2020): 393. http://dx.doi.org/10.3390/membranes10120393.

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High-performance Mixed-Matrix Membranes (MMMs) comprising of two kinds of porous fillers UiO-66 and Zeolite 4Aand their combination were fabricated with polysulfone (PSf) polymer matrix. For the very first time, UiO-66 and Zeolite 4A were jointly used as nanofillers in MMMs with the objective of complimenting synergistic effects. The individual and complimentary effects of nanofillers were investigated on membrane morphology and performance, pure water flux, humic acid rejection, static humic acid adsorption, and antifouling properties of membranes. Scanning Electron Microscopy (SEM) analysis of membranes confirmed that all MMMs possessed wider macrovoids with higher nanofiller loadings than neat PSf membranes and the MMMs (PSf/UiO-66 and PSf/Zeolite 4A-UiO-66) showed tendency of agglomeration with high nanofiller loadings (1 wt% and 2 wt%). All MMMs exhibited better hydrophilicity and lower static humic acid adsorption than neat PSf membranes. Pure water flux of MMMs was higher than neat PSf membranes but the tradeoff between permeability and selectivity was witnessed in the MMMs with single nanofiller. However, MMMs with combined nanofillers (PSf/Zeolite 4A-UiO-66) showed no such tradeoff, and an increase in both permeability and selectivity was achieved. All MMMs with lower nanofiller loadings (0.5 wt% and 1 wt%) showed improved flux recovery. PSf/Zeolite 4A-UiO-66 (0.5 wt%) membranes showed the superior antifouling properties without sacrificing permeability and selectivity.

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Shimekit, Biruh, Azmi Mohd Shariff, Hilmi Mukhtar, Mohamad Azmi Bustam, Ali E. I. Elkhalifah, Sami Ullah, and Nadia Riaz. "Interfacial Defects on Mixed Matrix Membranes and Mitigation Techniques for Gas Separation: A Review." Applied Mechanics and Materials 625 (September 2014): 653–56. http://dx.doi.org/10.4028/www.scientific.net/amm.625.653.

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Development of novel mixed matrix membranes (MMMs) has become frontier candidates for improving the upper bound trade-off curve between permeability and selectivity of gases for industrial polymeric membranes. However, fabrication of ideal MMMs is practically challenging as the dispersion of inorganic phase into the polymer may produce polymeric-inorganic interfacial defects at the vicinity of the polymer matrix. For instance, the inorganic phase may cause interfacial void, polymer chain rigidification or partial pore blockage on the overall MMMs. Since there are only few studies that specifically focus on the issues of the interfacial morphology of MMMs, therefore, the present study provides brief description of the aforementioned interfacial (non-ideal) defects of MMMs and summarizes the techniques used to repair the interfacial defects for enhanced gas separation in MMMs.

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Kosmas, C., N. Mylonakis, G. Tsakonas, G. Vorgias, N. Pantelis, P. Politis, N. Kalinoglou, N. Tsavaris, T. Akrivos, and A. Karabelis. "Paclitaxel (T), ifosfamide (I), and carboplatin (Cb) (TICb) combination chemotherapy in advanced uterine and adnexal malignant mixed mullerian tumors (MMMTs)." Journal of Clinical Oncology 27, no. 15_suppl (May 20, 2009): 5517. http://dx.doi.org/10.1200/jco.2009.27.15_suppl.5517.

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5517 Background: Malignant mixed mullerian tumors (MMMTs) of the uterus and adnexa represent aggressive gynecologic malignancies with a high rate of locoregional and distant failure. For that reason we evaluated the TICb combination in patients with advanced MMMTs. Methods: Patients with advanced MMMTs [stages III-IV and relapses after surgery (Sx)±RT], WHO-PS 0–2, no prior chemotherapy, unimpaired hematopoietic/organ function were eligible. Chemotherapy was administered as follows; T: 175 mg/m2 d1, I: 2.0 g/m2/d-d1+2, and Cb at a target AUC = 5 (according to creatinine clearance based on Calvert's formula) on d2 after I. G-CSF was administered from day 3–7. Results: Thirty-two patients with MMMTs of the uterus (n = 28), tubes (n = 2), or ovary (n = 2) have entered so far and all are evaluable for response and toxicity: median age = 61 (45–72), PS = 1 (0–1), stages; III = 18 (56%), IV = 14 (44%), histologies were; with homologous sarcoma component: 21, with heterologous component: 11. Prior treatment for locoregional disease included Sx: 23, Sx+RT: 9. Disease sites at diagnosis included: pelvic disease 12; pelvic/paraortic lymph nodes 14; peritoneal implants 16; liver 4; lung nodules 9; bone metastases 1; malignant pleural effusion 4. Responses were as follows: 21/32 (66%) evaluable patients responded, with 9 complete responses (CR) and 12 partial responses (PR), while 8 had stable disease (SD), and 3 developed progressive disease (PD). The median response duration was 8 mo (4–28), median time-to-progression (TTP) 12.5mo (4–26), while median overall survival (OS) has not been reached yet since most patients receive second-line therapy. Grade (Gr) 3/4 toxicities included: neutropenia 18/32 (56%)-with 11 developing Gr4 (≤7 days) and 19% of patients at least one episode of febrile neutropenia managed successfully by broad spectrum antibiotics, thrombocytopenia Gr3: 5/32 (16%) and Gr4 3/32 (9%), no Gr3 neuropathy, Gr1 CNS toxicity in 1, no renal toxicity, 15 Gr2 myalgias, and 4 Gr3 vomiting. Conclusions: In the present study, it appears that the TICb combination, yielded important activity with acceptable toxicity in females with advanced MMMTs. No significant financial relationships to disclose.

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Elrasheedy, Asmaa, Norhan Nady, Mohamed Bassyouni, and Ahmed El-Shazly. "Metal Organic Framework Based Polymer Mixed Matrix Membranes: Review on Applications in Water Purification." Membranes 9, no. 7 (July 19, 2019): 88. http://dx.doi.org/10.3390/membranes9070088.

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Polymeric membranes have been widely employed for water purification applications. However, the trade-off issue between the selectivity and permeability has limited its use in various applications. Mixed matrix membranes (MMMs) were introduced to overcome this limitation and to enhance the properties and performance of polymeric membranes by incorporation of fillers such as silica and zeolites. Metal-organic frameworks (MOFs) are a new class of hybrid inorganic–organic materials that are introduced as novel fillers for incorporation in polymeric matrix to form composite membranes for different applications especially water desalination. A major advantage of MOFs over other inorganic fillers is the possibility of preparing different structures with different pore sizes and functionalities, which are designed especially for a targeted application. Different MMMs fabrication techniques have also been investigated to fabricate MMMs with pronounced properties for a specific application. Synthesis techniques include blending, layer-by-layer (LBL), gelatin-assisted seed growth and in situ growth that proved to give the most homogenous dispersion of MOFs within the organic matrix. It was found that the ideal filler loading of MOFs in different polymeric matrices is 10%, increasing the filler loading beyond this value led to formation of aggregates that significantly decreased the MOFs-MMMs performance. Despite the many merits of MOFs-MMMs, the main challenge facing the upscaling and wide commercial application of MOFs-MMMs is the difficult synthesis conditions of the MOFs itself and the stability and sustainability of MOFs-MMMs performance. Investigation of new MOFs and MOFs-MMMs synthesis techniques should be carried out for further industrial applications. Among these new synthesis methods, green MOFs synthesis has been highlighted as low cost, renewable, environmentally friendly and recyclable starting materials for MOFs-MMMs. This paper will focus on the investigation of the effect of different recently introduced MOFs on the performance of MOFs-MMMs in water purification applications.

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Shin, Min-Ho, Sun-Seog Kweon, Jin-Su Choi, Young-Hoon Lee, Hae-Sung Nam, Kyeong-Soo Park, Hee Nam Kim, Sun-Young Oh, and Seul-Ki Jeong. "A Disease Modification Effect of APOEE4 on the Association between Urinary Albumin Excretion and Cognition in Korean Adults." Disease Markers 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/724281.

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Background. No previous study examined a disease modifying effect of APOEE4 status on the association between the urinary albumin-to-creatinine ratio (UACR) and cognition. This study aimed to investigate whether APOEE4 modified the association in Korean adults.Methods. We performed a cross-sectional study in adults aged 45 to 74 who were living in Namwon City, Republic of Korea. Cognitive function was measured with the Korean version of modified Mini-Mental State Examination (K-mMMSE) and cognitive impairment was defined as scores falling below the 25th percentile of the K-mMMSE according to age, sex, and educational attainments.Results. A total of 10,190 participants (4006 men and 6184 women) were analyzed in the present study. Of these, 1698 subjects (16.7%) were APOEE4 carriers. The UACR values were negatively associated with the K-mMMSE scores, even after adjusting for potential confounders including age, sex, education, and vascular risk factors. APOEE4 modified the association significantly, resulting in a steeper decline of cognitive function with the increase in UACR inE4 carriers (Pfor interaction = 0.021).Conclusion. Higher UACR values were significantly associated with cognitive dysfunction in the general Korean population, with cognition in APOEE4 carriers being more severely affected by increased UACR.

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Robinson-Bennett, B., R. Z. Belch, and A. C. Han. "Loss of p16 in recurrent malignant mixed müllerian tumors of the uterus." International Journal of Gynecologic Cancer 16, no. 3 (2006): 1354–57. http://dx.doi.org/10.1136/ijgc-00009577-200605000-00061.

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Uterine malignant mixed müllerian tumors (MMMTs) are rare and highly aggressive malignancies with poor clinical prognoses. We examined for differences in the oncoprotein profiles of primary versus recurrent MMMTs. Five cases of recurrent uterine MMMT were examined by paraffin immunohistochemistry for the expression of p53, p16, P-cadherin, and Cerb-B2. P16, p53, and P-cadherin were each expressed in 100%, 80%, and 60% of the primary cases, respectively. Three cases expressed all three oncoproteins. All five cases were negative for Cerb-B2. No difference in antigen expression was seen in the epithelial versus sarcomatous components. Primary and recurrent tumors were concordant for p53, P-cadherin, and Cerb-B2. However, three cases of recurrent tumors were negative for p16 expression. P53, p16, and P-cadherin are common tumor suppressor genes expressed in uterine MMMT. Interestingly, p16 protein expression was lost in some cases of MMMTs when they recurred. This suggests that the oncoprotein and possibly genetic profile of p16 changes over time. We did not observe any difference in antigen expression between areas of epithelial or sarcomatous differentiation, which would support a single pluripotential malignant clone in the histogenesis of these tumors.

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Ding, Sie Hao, Tiffany Yit Siew Ng, Thiam Leng Chew, Pei Ching Oh, Abdul Latif Ahmad, and Chii-Dong Ho. "Evaluation of the Properties, Gas Permeability, and Selectivity of Mixed Matrix Membrane Based on Polysulfone Polymer Matrix Incorporated with KIT-6 Silica." Polymers 11, no. 11 (October 23, 2019): 1732. http://dx.doi.org/10.3390/polym11111732.

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Mixed matrix membranes (MMMs) separation is a promising technology for gas permeation and separation involving carbon dioxide (CO2). However, finding a suitable type of filler for the formation of defect-free MMMs with enhancement in gas permeability remains a challenge. Current study focuses on synthesis of KIT-6 silica and followed by the incorporation of KIT-6 silica as filler into polysulfone (PSF) polymer matrix to fabricate MMMs, with filler loadings of 0–8 wt %. The effect of KIT-6 incorporation on the properties of the fabricated MMMs was evaluated via different characterization techniques. The MMMs were investigated for gas permeability and selectivity with pressure difference of 5 bar at 25 °C. KIT-6 with typical rock-like morphology was synthesized. Incorporation of 2 wt % of KIT-6 into PSF matrix produced MMMs with no void. When KIT-6 loadings in the MMMs were increased from 0 to 2 wt %, the CO2 permeability increased by ~48%, whereas the ideal CO2/CH4 selectivity remained almost constant. However, when the KIT-6 loading in PSF polymer matrix was more than 2 wt %, the formation of voids in the MMMs increased the CO2 permeability but sacrificed the ideal CO2/CH4 selectivity. In current study, KIT-6 was found to be potential filler for PSF matrix under controlled KIT-6 loading for gas permeation.

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Chuah, Chong Yang, Xu Jiang, Kunli Goh, and Rong Wang. "Recent Progress in Mixed-Matrix Membranes for Hydrogen Separation." Membranes 11, no. 9 (August 30, 2021): 666. http://dx.doi.org/10.3390/membranes11090666.

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Membrane separation is a compelling technology for hydrogen separation. Among the different types of membranes used to date, the mixed-matrix membranes (MMMs) are one of the most widely used approaches for enhancing separation performances and surpassing the Robeson upper bound limits for polymeric membranes. In this review, we focus on the recent progress in MMMs for hydrogen separation. The discussion first starts with a background introduction of the current hydrogen generation technologies, followed by a comparison between the membrane technology and other hydrogen purification technologies. Thereafter, state-of-the-art MMMs, comprising emerging filler materials that include zeolites, metal-organic frameworks, covalent organic frameworks, and graphene-based materials, are highlighted. The binary filler strategy, which uses two filler materials to create synergistic enhancements in MMMs, is also described. A critical evaluation on the performances of the MMMs is then considered in context, before we conclude with our perspectives on how MMMs for hydrogen separation can advance moving forward.

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Susanti, Indri. "POLYSULFONE MEMBRANE WITH ZEOLITE FILLER FOR CO2/CH4 GAS SEPARATION: A REVIEW." Science Education and Application Journal 1, no. 1 (April 9, 2019): 10. http://dx.doi.org/10.30736/seaj.v1i1.93.

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Membrane technology for gas separation applications are limited by a "trade-off" curve between permeability and selectivity. It show that permeability is high, selectivity obtained is low. This problem can be solved by preparation of Mixed-Matrix Membrane (MMMs) which can increase the value of permeability and selectivity. The MMMs with polysulfone polymers and zeolite fillers is more corresponding for gas separation. Addition of zeolite filler to polysulfone polymer in MMMs can improve the CO2 separation performance. In this review, mechanism of gas separation in MMMs was carried out in the application of CO2/CH4 gas separation. In addition, the effect of addition, size and pore of zeolite filler in MMMs for binary gas separation were also discussed in this review.

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Castillo-Lancellotti, Cecilia, Paula Margozzini, Gonzalo Valdivia, Oslando Padilla, Ricardo Uauy, Jaime Rozowski, and Josep A. Tur. "Serum folate, vitamin B12 and cognitive impairment in Chilean older adults." Public Health Nutrition 18, no. 14 (January 20, 2015): 2600–2608. http://dx.doi.org/10.1017/s1368980014003206.

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AbstractObjectiveTo analyse the relationship between serum folate (SF), vitamin B12 and impaired cognitive function in the Chilean elderly.DesignWe analysed the relationships between impaired cognitive function and age, SF (µg/l) and vitamin B12 (pg/ml) with Student’s t test, as well as between impaired cognitive function and gender, educational level, residence area, diabetes and hypertension with the χ2 test. Multiple logistic regressions with interactions were estimated to assess the impact of SF on impaired cognitive function according to these methods.SettingChile.SubjectsOlder adults (>65 years, n 1051), drawn from representative households of a national prevalence study, assessed using the Modified Mini Mental Status Examination (MMMSE). Individuals with altered MMMSE scores (≤13 points) were sequentially assessed using the Pfeffer Functional Activities Questionnaire (PFAQ).ResultsMultivariate models using the MMMSE demonstrated an increased risk of impaired cognitive function for seniors who had hypertension, diabetes and higher vitamin B12 levels. SF and its square (SF2) were statistically significant, indicating that this predictor of impaired cognitive function displays a U-shaped distribution. The interaction between SF and vitamin B12 was not statistically significant. Models using the MMMSE plus PFAQ suggested that urban residence decreased the risk of impaired cognitive function, whereas male gender, older age, vitamin B12 levels and hypertension increased this risk. The variables SF and SF2 and the SF × vitamin B12 interaction were statistically significant (P<0.05). The risk of impaired cognitive function depended on different combinations of SF and vitamin B12 levels. When SF was low, a one-unit increase in SF (1 µg/l) diminished the risk. When SF was elevated, a further increase in SF raised the risk, especially at low vitamin B12 levels.ConclusionsThe relationship between folate, vitamin B12 and impaired cognitive function warrants further study.

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Salahshoori, Iman, Ahmad Seyfaee, and Aziz Babapoor. "Recent advances in synthesis and applications of mixed matrix membranes." Synthesis and Sintering 1, no. 1 (March 29, 2021): 1–27. http://dx.doi.org/10.53063/synsint.2021.116.

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Researchers are currently considering membranes separation processes due to their eco-friendly, process simplicity and high efficiency. Selecting a suitable and efficient operation is the primary concern of researchers in the field of separation industries. In recent decades, polymeric and inorganic membranes in the separation industry have made significant progress. The polymeric and inorganic membranes have been challenged due to their competitiveness in permeability and selectivity factors. A combination of nanoparticle fillers within the polymer matrix is an effective method to increase polymeric and inorganic membranes’ efficiency in separation processes. Mixed matrix membranes (MMMs) have been considered by the separation industry due to high mechanical and physicochemical, and transfer properties. Moreover, gas separation, oil treatment, heavy metal ions removal, water treatment and oil-water separation are common MMMs applications. Selecting suitable polymer blends and fillers is the key to the MMMs construction. The combination of rubbery and glassy polymers with close solubility parameters increases the MMMs performance. The filler type and synthesis methods also affect the morphological and transfer properties of MMMs significantly. Zeolites, graphene oxide (GO), nanosilica, carbon nanotubes (CNTs), zeolite imidazole frameworks (ZIFs) and metal-organic frameworks (MOFs) are used in the MMMs synthesis as fillers. Finally, solution mixing, polymerization in situ and sol-gel are the primary synthesising MMMs methods.

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Wu, Kevin C. W., Chao-Hsiang Kang, Yi-Feng Lin, Kuo-Lun Tung, Yu-Heng Deng, Tansir Ahamad, Saad M. Alshehri, Norihiro Suzuki, and Yusuke Yamauchi. "Towards Acid-Tolerated Ethanol Dehydration: Chitosan-Based Mixed Matrix Membranes Containing Cyano-Bridged Coordination Polymer Nanoparticles." Journal of Nanoscience and Nanotechnology 16, no. 4 (April 1, 2016): 4141–46. http://dx.doi.org/10.1166/jnn.2016.12614.

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Prussian blue (PB) nanoparticles, one of many cyano-bridged coordination polymers, are successfully incorporated into chitosan (CS) polymer to prepare PB/CS mixed matrix membranes (MMMs). The PB nanoparticles are uniformly distributed in the MMMs without the collapse of the original PB structure. As-prepared PB/CS MMMs are used for ethanol dehydration at 25 °C in the pervaporation process. The effect of loading PB in CS matrix on pervaporation performance is carefully investigated. The PB/CS membrane with 30 wt% PB loading shows the best performance with a permeate flux of 614 g·m−2 ·h−1 and a separation factor of 1472. The pervaporation using our PB/CS membranes exhibits outstanding performance in comparison with the previously reported CS-based membranes and MMMs. Furthermore, the addition of PB allows PB/CS MMMs to be tolerant of acidic environment. The present work demonstrates good pervaporation performance of PB/CS MMMs for the separation of an ethanol/water (90:10 in wt%) solution. Our new system provides an opportunity for dehydration of bioethanol in the future.

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Hsieh, Ching-Wen, Bo-Xian Li, and Shing-Yi Suen. "Alicyclic Polyimide/SiO2 Mixed Matrix Membranes for Water/n-Butanol Pervaporation." Membranes 11, no. 8 (July 27, 2021): 564. http://dx.doi.org/10.3390/membranes11080564.

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Alicyclic polyimides (PIs) have excellent properties in solubility, mechanical strength, thermal property, etc. This study developed two types of alicyclic PI-based mixed matrix membranes (MMMs) for water/n-butanol pervaporation application, which have never been investigated previously. The fillers were hydrophilic SiO2 nanoparticles. The synthesized PI was mixed with SiO2 nanoparticles in DMAc to make the casting solution, and a liquid film was formed over PET substrate using doctor blade. A dense MMM was fabricated at 80 °C and further treated via multi-stage curing (100–170 °C). The prepared membranes were characterized by FTIR, TGA, FE-SEM, water contact angle, and solvent swelling. The trends of pure solvent swelling effects agree well with the water contact angle results. Moreover, the pervaporation efficiencies of alicyclic PI/SiO2 MMMs for 85 wt% n-butanol aqueous solution at 40 °C were investigated. The results showed that BCDA-3,4′-ODA/SiO2 MMMs had a larger permeation flux and higher separation factor than BCDA-1,3,3-APB/SiO2 MMMs. For both types of MMMs, the separation factor increased first and then decreased, with increasing SiO2 loading. Based on the PSI performance, the optimal SiO2 content was 0.5 wt% for BCDA-3,4′-ODA/SiO2 MMMs and 5 wt% for BCDA-1,3,3-APB/SiO2 MMMs. The overall separation efficiency of BCDA-3,4′-ODA-based membranes was 10–30-fold higher.

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Safak Boroglu, Mehtap, Ismail Boz, and Busra Kaya. "Effect of new metal–organic framework (zeolitic imidazolate framework [ZIF-12]) in mixed matrix membranes on structure, morphology, and gas separation properties." Journal of Polymer Engineering 41, no. 4 (March 15, 2021): 259–70. http://dx.doi.org/10.1515/polyeng-2020-0288.

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AbstractIn our study, the synthesis of zeolitic imidazolate framework (ZIF-12) crystals and the preparation of mixed matrix membranes (MMMs) with various ZIF-12 loadings were targeted. The characterization of ZIF-12 and MMMs were carried out by Fourier transform infrared spectroscopy analysis, thermogravimetric analysis, scanning electron microscopy (SEM), and thermomechanical analysis. The performance of MMMs was measured by the ability of binary gas separation. Commercial polyetherimide (PEI-Ultem®1000) polymer was used as the polymer matrix. The solution casting method was utilized to obtain dense MMMs. In the SEM images of ZIF-12 particles, the particles with a rhombic dodecahedron structure were identified. From SEM images, it was observed that the distribution of ZIF-12 particles in the MMMs was homogeneous and no agglomeration was present. Gas permeability experiments of MMMs were measured for H2, CO2, and CH4gases at steady state, at 4 bar and 35 °C by constant volume-variable pressure method. PEI/ZIF-12-30 wt% MMM exhibited high permeability and ideal selectivity values for H2/CH4and CO2/CH4werePH2/CH4=331.41${P}_{{\text{H}}_{2}/{\text{CH}}_{4}}=331.41$andPCO2/CH4=53.75${P}_{{\text{CO}}_{2}/{\text{CH}}_{4}}=53.75$gas pair.

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Sumer, Zeynep, and Seda Keskin. "Computational Screening of MOF-Based Mixed Matrix Membranes for CO2/N2Separations." Journal of Nanomaterials 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/6482628.

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Atomically detailed simulations were used to examine CO2/N2separation potential of metal organic framework- (MOF-) based mixed matrix membranes (MMMs) in this study. Gas permeability and selectivity of 700 new MMMs composed of 70 different MOFs and 10 different polymers were calculated for CO2/N2separation. This is the largest number of MOF-based MMMs for which computational screening is done to date. Selecting the appropriate MOFs as filler particles in polymers resulted in MMMs that have higher CO2/N2selectivities and higher CO2permeabilities compared to pure polymer membranes. We showed that, for polymers that have low CO2permeabilities but high CO2selectivities, the identity of the MOF used as filler is not important. All MOFs enhanced the CO2permeabilities of this type of polymers without changing their selectivities. Several MOF-based MMMs were identified to exceed the upper bound established for polymers. The methods we introduced in this study will create many opportunities to select the MOF/polymer combinations with useful properties for CO2separation applications.

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ISHIMATSU, Sumiyo, Takako OYABU, Hajime HORI, and Isamu TANAKA. "A New Digestion Method for Recovery of MMMFs from Lungs." INDUSTRIAL HEALTH 37, no. 3 (1999): 307–12. http://dx.doi.org/10.2486/indhealth.37.307.

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Lu, Jiangfeng, Xu Zhang, Lusheng Xu, Guoliang Zhang, Jiuhan Zheng, Zhaowei Tong, Chong Shen, and Qin Meng. "Preparation of Amino-Functional UiO-66/PIMs Mixed Matrix Membranes with [bmim][Tf2N] as Regulator for Enhanced Gas Separation." Membranes 11, no. 1 (January 4, 2021): 35. http://dx.doi.org/10.3390/membranes11010035.

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Development of mixed matrix membranes (MMMs) with excellent permeance and selectivity applied for gas separation has been the focus of world attention. However, preparation of high-quality MMMs still remains a big challenge due to the lack of enough interfacial interaction. Herein, ionic liquid (IL)-modified UiO-66-NH2 filler was first incorporated into microporous organic polymer material (PIM-1) to prepare dense and defect-free mixed matrix membranes via a coating modification and priming technique. IL [bmim][Tf2N] not only improves the hydrophobicity of UiO-66-NH2 and facilitates better dispersion of UiO-66-NH2 nanoparticles into PIM-1 matrix, but also promotes the affinity between MOFs and polymer, sharply reducing interface non-selective defects of MMMs. By using this strategy, we can not only facilely synthesize high-quality MMMs ignoring non-selective interfacial voids, but also structurally regulate MOF nanoparticles in the polymer substrate and greatly improve interface compatibility and stability of MMMs. The method also gives suitable level of generality for fabrication of versatile defect-free MMMs based on different combination of MOFs and PIMs. The prepared UiO-66-NH2@IL/PIM-1 membrane exhibited outstanding gas separation behavior with large CO2 permeation of 8283.4 Barrer and high CO2/N2 selectivity of 22.5.

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Sutrisna, Putu Doddy, Candra Wijaya, Christoper Robby, and Jessy Liliani. "ZIF-8/Cellulose Acetate Based Mixed Matrix Membranes (MMMs) Synthesis and Characterization." Advances in Science and Technology 104 (February 2021): 57–64. http://dx.doi.org/10.4028/www.scientific.net/ast.104.57.

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Mixed matrix membranes (MMMs) have gained much interest in the last two decades to be used as water, waste water, and gas separation membranes. MMMs combine polymer matrix and inorganic filler to improve the performances of pure polymeric membranes. However, the choice of filler should be conducted carefully to avoid the formation of microvoids that can decrease the membrane’s performances. Hence, in this study the synthesis and characterization of Zeolitic Imidazolate Framework-8 (ZIF-8) based MMMs were conducted in which the ZIF-8 has organic component that can improve the particle dispersion and avoid the formation of microvoids. Experimental results showed that ZIF-8 incorporation improved the degree of crystallinity of MMMs and also enhanced the particle dispersion compared to pure inorganic fillers, such as TiO2.

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NORTON, KAY. "“Yes, [Gospel] Is Real”: Half a Century with Chicago's Martin and Morris Company." Journal of the Society for American Music 11, no. 4 (October 20, 2017): 420–51. http://dx.doi.org/10.1017/s1752196317000360.

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AbstractThe Martin and Morris Music Studio (MMMS) imprint permeated the first fifty years of black gospel music. Jointly owned by singer/impresaria Sallie Martin (1895/6–1988) and composer/arranger/pianist/organist Kenneth Morris (1917–88), the MMMS delivered gospel songs to an eager public and offered ordinary Americans the chance to see their names in print as author or composer on the cover of a gospel octavo, copies of which could then be sold to benefit that same ordinary American. Their influence extended far beyond that service, however. Martin and her Singers performed and popularized music bearing the MMMS imprint in venues ranging from small churches in the Deep South to national conventions in Washington, D.C., and widened circulation of MMMS music via Los Angeles recording studios. The unprecedented accomplishments of the MMMS, active from 1940 to 1993, have not been fully explored. Relying on transcribed interviews of the owners by Bernice Johnson Reagon, James Standifer, and others, accounts in historical newspapers, and company archives, this article addresses that void. The centrality of the MMMS in twentieth-century gospel of all types is clarified through examination of contexts for black-owned music publishing in the last century, the owners’ early business models, and their changing roles in the creation, publication, popularization, and dissemination of gospel music for more than fifty years.

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Sutrisna, Putu Doddy, and Emma Savitri. "High gas permeability of nanoZIF-8/polymer-based mixed matrix membranes intended for biogas purification." Journal of Polymer Engineering 40, no. 6 (July 28, 2020): 459–67. http://dx.doi.org/10.1515/polyeng-2019-0280.

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AbstractThe production of biomethane from the biogas purification process depends on the capacity of the separation technique employed to separate methane from carbon dioxide. Mixed matrix membranes (MMMs) combine the benefits of polymeric and inorganic materials, and it is believed that the trade-off between gas permeability and selectivity in polymeric membranes can be hampered by MMMs. Until recently, the development of MMMs for the biogas purification process has been constrained in lab scales. To be applied in large scales, the increase in gas permeability as well as the membrane performance under the influence of CO2 plasticization needs to be investigated. This paper reports the evaluation of gas permeability and CO2/CH4 gas separation performances of nano zeolitic imidazolate framework (ZIF)-8/Pebax-1657 to be used for biogas purification processes. In addition, the study on the CO2 plasticization behavior of MMMs fabricated with co-polymer Pebax was investigated. The incorporation of nanoZIF-8 particles inhibited the increase of CO2 permeability due to the reduced polymer flexibility. In addition, the diffusional selectivity of ZIF-8 improves the permeation behavior of both gases through MMMs. With nanoZIF-8/Pebax-1657 MMMs, the incorporation of particles improves the gas permeability with a slight decrease in gas selectivity, indicating a potentiality of the membranes used for biogas purification processes.

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Zhu, Lifang, Hongwei Yu, Huijuan Zhang, Jiangnan Shen, Lixin Xue, Congjie Gao, and Bart van der Bruggen. "Mixed matrix membranes containing MIL-53(Al) for potential application in organic solvent nanofiltration." RSC Advances 5, no. 89 (2015): 73068–76. http://dx.doi.org/10.1039/c5ra10259f.

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PMIA MMMs with various amounts of MIL-53(Al) were developed through non-solvent induced phase separation and the MMMs permeance was increased dramatically while keeping high rejections in organic solvent nanofiltration.

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Ptashkina, Evgeniya A., Elizaveta G. Kabanova, Anna I. Tursina, Alexandr V. Yatsenko, and Victor N. Kuznetsov. "Synthesis and crystal structure of a new Cu3Au-type ternary phase in the Au–In–Pd system: distribution of atoms over crystallographic positions." Acta Crystallographica Section C Structural Chemistry 74, no. 3 (February 14, 2018): 295–99. http://dx.doi.org/10.1107/s2053229618001973.

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A new Cu3Au-type ternary phase (τ phase) is found in the AuPd-rich part of the Au–In–Pd system. It has a broad homogeneity range based on extensive (Pd,Au) and (In,Au) replacement, with the composition varying between Au17.7In25.3Pd57.0and Au50.8In16.2Pd33.0. The occupancies of the crystallographic positions were studied by single-crystal X-ray diffraction for three samples of different composition. The sites withm\overline{3}msymmetry are occupied by atoms with a smaller scattering power than the atoms located on 4/mmmsites. Two extreme structure models were refined. Within the first, the occupation type changes from (Au,In,Pd)3(Pd,In) to (Au,Pd)3(In,Pd,Au) with an increase in the Au gross content. For the second model, the occupation type (Au,In,Pd)3(Pd,Au) remains essentially unchanged for all Au concentrations. Although the diffraction data do not allow the choice of one of these models, the latter model, where Au substitutes In on 4/mmmsites, seems to be preferable, since it agrees with the fact that the homogeneity range of the τ phase is inclined to the Au corner and provides the same occupation type for all the studied samples of different compositions.

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Ching, Oh Pei, and Mason Wong Bak Lung. "Effects of Montmorillonite (MMT) Inorganic Fillers on Polyvinylidene (PVDF) Mixed Matrix Membrane." Applied Mechanics and Materials 625 (September 2014): 696–700. http://dx.doi.org/10.4028/www.scientific.net/amm.625.696.

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Asymmetric nanoclay-polyvinylidene (PVDF) mixed matrix membranes (MMMs) were prepared by the reaction of various amount of montmorillonite (MMT) nanoclay mineral with PVDF. The MMMs were fabricated via dry-wet phase inversion method withN,N-dimethyl-acetamide (DMAc) as the solvent and ethanol as the coagulant. The fabricated MMMs were characterized by means of fourier-transform infrared (FTIR) and scanning electron microscopy (SEM). The separation performances of the prepared membranes were evaluated by pure gases (CO2and CH4). From the FTIR spectrum, MMMs exhibited new peaks compared to pristine PVDF membrane, indicating assimilation of MMT into the PVDF membrane. The morphology of the membranes depends on the clay mineral loading as confirmed by SEM. PVDF/3wt% MMT MMM showed the highest CO2permeance and CO2/CH4selectivity relative to neat PVDF membrane.

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Cho, H., L. Chavez, E. E. Sigmund, D. P. Madio, and Y. Q. Song. "Fast imaging with the MMME sequence." Magnetic Resonance Imaging 25, no. 4 (May 2007): 554. http://dx.doi.org/10.1016/j.mri.2007.01.032.

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Cho, H., L. Chavez, E. E. Sigmund, D. P. Madio, and Y. Q. Song. "Fast imaging with the MMME sequence." Journal of Magnetic Resonance 180, no. 1 (May 2006): 18–28. http://dx.doi.org/10.1016/j.jmr.2005.12.014.

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Ge, Baosheng, Yanyan Xu, Haoru Zhao, Haixiang Sun, Yaoli Guo, and Wenguang Wang. "High Performance Gas Separation Mixed Matrix Membrane Fabricated by Incorporation of Functionalized Submicrometer-Sized Metal-Organic Framework." Materials 11, no. 8 (August 13, 2018): 1421. http://dx.doi.org/10.3390/ma11081421.

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Mixed matrix membranes (MMMs) attract great attention due to their outstanding gas separation performance. The compatibility between the fillers and the polymer matrix is one of the key points for the preparation of high-performance MMMs. In this work, MMMs consisting of metal-organic frameworks (MOFs) of amine-modified Cu-BTC (NH2-Cu-BTC; BTC = 1,3,5-benzenetricarboxylic acid) and submicrometer-sized amine-modified Cu-BTC (sub-NH2-Cu-BTC) incorporated into a Pebax-1657 polymer were fabricated for the gas separation. The SEM image and Fourier transform infrared spectroscopy (FTIR) spectra showed an increase in the surface roughness of MOFs and the presence of amino groups on the surface of Cu-BTC after the amination modification, and a decrease in the size of MOFs crystals after the submicrometer-sized aminated modification. Gas adsorption analysis indicated that NH2-Cu-BTC and sub-NH2-Cu-BTC had a higher gas adsorption capacity for CO2 compared to the unmodified Cu-BTC. The scanning electron microscopy (SEM) image showed that NH2-Cu-BTC and sub-NH2-Cu-BTC, especially sub-NH2-Cu-BTC, had a better compatibility with a polyether-block-amide (Pebax) matrix in the MMMs. The gas separation performance indicated that the Pebax/sub-NH2-Cu-BTC MMMs evidently improved the CO2/N2 and CO2/CH4 selectivity at the expense of a slight CO2 permeability. The results reveal that modified MOF-filled MMMs possess great potential for applications in the CO2 separation field.

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Song, Yang, Mingjie Wei, Fang Xu, and Yong Wang. "Transport mechanism of water molecules passing through polyamide/COF mixed matrix membranes." Physical Chemistry Chemical Physics 21, no. 48 (2019): 26591–97. http://dx.doi.org/10.1039/c9cp05026d.

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Mixed matrix membranes (MMMs) have gained significant attention due to their high water permeability without the cost of salt rejection. The mechanism of permeability promotion for PA/COFs MMMs is investigated in this work from molecular insights.

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Kardani, Rokhsare, Morteza Asghari, Toraj Mohammadi, and Morteza Afsari. "Effects of nanofillers on the characteristics and performance of PEBA-based mixed matrix membranes." Reviews in Chemical Engineering 34, no. 6 (November 27, 2018): 797–836. http://dx.doi.org/10.1515/revce-2017-0001.

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AbstractMixed matrix membranes (MMMs) with superior structural and functional properties provide an interesting approach to enhance the separation properties of polymer membranes. As a matter of fact, MMMs combine the advantages of both components; polymeric continuous phase and nanoparticle dispersed phase. Generally, the separation performance of polymeric membranes suffers from an upper-performance limit. Hence, the incorporation of nanoparticles helps to overcome such limitations. Block copolymers such as poly(ether-block-amide) (PEBA) composed of immiscible soft ether segments as well as hard amide segments have been shown as excellent materials for the synthesis of membranes. Consequently, PEBA membranes have been extensively used in scientific research and industrial processes. It is thus aimed to provide an overview of PEBA MMMs. This review is especially devoted to summarizing the effects of nanoparticle loading on PEBA performance and properties such as selectivity, permeability, thermal and mechanical properties, and others. In addition, the preparation techniques of PEBA MMMs and solvent selection are discussed. This article also discusses the many types of nanoparticles incorporated into PEBA membranes. Furthermore, the future direction in PEBA MMMs research for separation processes is briefly predicted.

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Lim, Yu Jie, So Min Lee, Rong Wang, and Jaewoo Lee. "Emerging Materials to Prepare Mixed Matrix Membranes for Pollutant Removal in Water." Membranes 11, no. 7 (July 5, 2021): 508. http://dx.doi.org/10.3390/membranes11070508.

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Various pollutants of different sizes are directly (e.g., water-borne diseases) and indirectly (e.g., accumulation via trophic transfer) threatening our water health and safety. To cope with this matter, multifaceted approaches are required for advanced wastewater treatment more efficiently. Wastewater treatment using mixed matrix membranes (MMMs) could provide an excellent alternative since it could play two roles in pollutant removal by covering adsorption and size exclusion of water contaminants simultaneously. This paper provides an overview of the research progresses and trends on the emerging materials used to prepare MMMs for pollutant removal from water in the recent five years. The transition of the research trend was investigated, and the most preferred materials to prepare MMMs were weighed up based on the research trend. Various application examples where each emerging material was used have been introduced along with specific mechanisms underlying how the better performance was realized. Lastly, the perspective section addresses how to further improve the removal efficiency of pollutants in an aqueous phase, where we could find a niche to spot new materials to develop environmentally friendly MMMs, and where we could further apply MMMs.

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Hakimah, Annisatul, Nour Sjakoer, and Nurul Mubarakati. "Histopathological Profile of Therapeutic Doses of Mango Mistletoe Methanolic Extract (MMME) in Cardiac of Hypertensive Rats (DOCA-Salt)." JSMARTech 2, no. 2 (April 16, 2021): 048–54. http://dx.doi.org/10.21776/ub.jsmartech.2021.002.02.48.

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This study determined the effect of Mango mistletoe Methanolic Extract (MMME) on the cardiac's histopathological profile of hypertensive rats (DOCA-Salt) treated. The MMME was treated on fifty rats for 14 days, divided into five treatments: negative control, positive control, doses 50, 100, and 200 mg/kg BW with five replications. One-way ANOVA analysis was used, namely JAMOVI with version 1.1.9.0, and for cell calculation, diameter using the IMAGE J application. Results showed that there were no significant differences in the histopathological profile of the cardiac in hypertensive rats (DOCA-Salt) treated with MMME for 14 days on the diameter of the heart muscle cells between the control (+) and control groups (-), treatments 1, 2, and 3. This is evidenced by the analysis of p-value> 0.05, namely 0.187 millimeters. Therefore, we concluded that MMME does not affect the diameter of heart/cardiac organ muscle cells. However, there was a significant difference in the amount of necrosis in the cardiac of hypertensive rats between control (+) and control (-) groups, treatments 1, 2, and 3. Based on the results, MMME reduces the number of necrosis in the heart/cardiac organ.

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Monsalve-Bravo, Gloria, and Suresh Bhatia. "Modeling Permeation through Mixed-Matrix Membranes: A Review." Processes 6, no. 9 (September 18, 2018): 172. http://dx.doi.org/10.3390/pr6090172.

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Over the past three decades, mixed-matrix membranes (MMMs), comprising an inorganic filler phase embedded in a polymer matrix, have emerged as a promising alternative to overcome limitations of conventional polymer and inorganic membranes. However, while much effort has been devoted to MMMs in practice, their modeling is largely based on early theories for transport in composites. These theories consider uniform transport properties and driving force, and thus models for the permeability in MMMs often perform unsatisfactorily when compared to experimental permeation data. In this work, we review existing theories for permeation in MMMs and discuss their fundamental assumptions and limitations with the aim of providing future directions permitting new models to consider realistic MMM operating conditions. Furthermore, we compare predictions of popular permeation models against available experimental and simulation-based permeation data, and discuss the suitability of these models for predicting MMM permeability under typical operating conditions.

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Zhang, Yiming, Huixian Wang, Siyu Zhou, Jing Wang, Xuezhong He, Jindun Liu, and Yatao Zhang. "Biomimetic material functionalized mixed matrix membranes for enhanced carbon dioxide capture." Journal of Materials Chemistry A 6, no. 32 (2018): 15585–92. http://dx.doi.org/10.1039/c8ta03198c.

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Different mixed matrix membranes (MMMs) with various CoBBP nanoparticle loadings were fabricated and tested. Compared to the pure Pebax membrane, the designed MMMs showed both high CO₂ permeability and high CO₂/N₂ selectivity.

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Khedr, Eman M., Ragaa H. Salama, Mohamed Abdel Hameed, Noha Abo Elfetoh, and Peater Seif. "Therapeutic Role of Transcranial Direct Current Stimulation in Alzheimer Disease Patients: Double-Blind, Placebo-Controlled Clinical Trial." Neurorehabilitation and Neural Repair 33, no. 5 (April 3, 2019): 384–94. http://dx.doi.org/10.1177/1545968319840285.

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Objective. To explore the neuropsychological effects and levels of tau protein (TAU), amyloid β 1-42 (Aβ 1-42), and lipid peroxidase after 10 sessions of anodal transcranial direct current stimulation (tDCS) in patients with mild to moderate Alzheimer disease (AD). Patients and methods. A total of 46 consecutive patients with probable AD participated in this study. They were classified randomly into 2 equal groups: active versus sham. Each patient received 10 sessions of anodal tDCS over the left and right temporoparietal region for 20 minutes for each side with the cathode on the left arm. Patients were assessed using the Modified Mini Mental State Examination (MMMSE), clock drawing test, Montreal Cognitive Scale (MoCA), and the Cornell Scale for depression. Serum TAU, Aβ 1-42, and lipid peroxidase were measured before and after the 10th session. Results. There was a significant improvement in the total score of each cognitive rating scale (MMMSE, clock drawing test, and MoCA) in the real group, whereas no such change was observed in the sham group. The Cornell depression score improved significantly in both groups. There was a significant increase in serum Aβ 1-42 ( P = .02) in the real but not in the sham group, with a significant Treatment condition × Time interaction ( P = .009). There was no significant effect on tau or lipid peroxidase in either group but a significant positive correlation between changes of Aβ1-42 and MMMSE ( P = .005) and MoCA ( P = .02). Conclusion. The observed cognitive improvements were complemented by parallel changes in serum levels of Aβ 1-42.

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Elgaid, K., D. Edgar, S. Ferguson, S. Broadfoot, M. Taylor, and S. Beaumont. "Compact low loss coplanar waveguide to slotline transition for MMMIC applications." Electronics Letters 32, no. 18 (1996): 1677. http://dx.doi.org/10.1049/el:19961142.

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Chen, Wenhui, Qiu Han, Yang Liu, Yiwen Wang, and Fu Liu. "Targeted perfusion adsorption for hyperphosphatemia using mixed matrix microspheres (MMMs) encapsulated NH2-MIL-101(Fe)." Journal of Materials Chemistry B 9, no. 22 (2021): 4555–66. http://dx.doi.org/10.1039/d1tb00329a.

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A microporous surface and finger-like pores promote mass transfer, and NH₂-MIL-101(Fe) wrapped in sponge-like pores inside mixed matrix microspheres (MMMs) can capture phosphate, thereby achieving good adsorption capacity of the MMMs for phosphorus in the blood.

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Xu, Yong-Kai, Mei-Mei Meng, Ji-Ming Xi, Li-Fei Wang, Rui Zhu, Xing-Gui Liu, Rui Zhang, et al. "Mixed matrix membranes containing fluorescent coordination polymers for detecting Cr2O72− with high sensitivity, stability and recyclability." Dalton Transactions 50, no. 23 (2021): 7944–48. http://dx.doi.org/10.1039/d1dt00894c.

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Mixed matrix membranes (MMMs) containing fluorescent coordination polymers (CPs) showed high sensitivity and selectivity for detecting Cr₂O₇²⁻ in water. Both recyclability and stability of the MMMs were remarkably higher than those of CP powders.

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Munakata, Satoru, Emi Iwai, Tomohito Tanaka, Michihiko Nakamura, and Takayoshi Kanda. "Malignant Müllerian Mixed Tumor of the Uterine Cervix with a Small Cell Neuroendocrine Carcinoma Component." Case Reports in Pathology 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/630859.

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Malignant Müllerian mixed tumors (MMMTs) of the uterine cervix are extremely rare, accounting for 0.005% of all cervical malignancies. To date, only approximately 50 well-documented cases have been reported. Although several epithelial components have been described in cervical MMMTs, small cell neuroendocrine carcinoma (SCC) has not appeared in the English literature. We present a 43-year-old woman, para 2 gravida 2, who had MMMT with SCC and rhabdomyosarcoma components in the uterine cervix. She was referred to our hospital because of a cervical mass with an abnormal Pap smear result. Cervical biopsy revealed SCC. After neoadjuvant chemotherapy with balloon-occluded arterial infusion, she underwent type II radical hysterectomy with pelvic lymphadenectomy. Histological analysis revealed that the cervical tumor comprised SCC and rhabdomyosarcoma components. Genotype analysis indicated human papillomavirus type 18. She underwent concurrent chemoradiation therapy. The patient had been free of the disease and showed no evidence of recurrence 38 months after operation.

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Ridzuan, Norida Binti, and Muhammad Hidayat Musa. "Comparison between Treated and Untreated Zeolite towards the Performance of Polyethersulfone Mixed Matrix Membranes (MMMs) for O2/N2 Gas Separation." Advanced Materials Research 550-553 (July 2012): 728–35. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.728.

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Keywords: Polyethersulfone MMMs, Zeolite 4A, Silane Coupling Agent, Gas separation Abstract.Mixed Matrix Membranes (MMMs) is one of the alternative ways to increase the performance of plain polymeric membrane. In this study, the performance of MMMs using treated zeolite and the ones using untreated zeolite were compared to see the effect of the coupling agent towards the separation of O2 and N2. The polymer solution contains Polyethersulfone (PES) as the polymer, N-Methyl Pyrrolidone (NMP) as the solvent and distilled water (H2O) as the non-solvent. For the MMMs using treated zeolite, the zeolite was first treated using Aminopropyl-Trimethoxysilane (APTMOS), a silane coupling agent before inserted into the polymer solution. For both types of MMMs, the zeolite concentration between 5 to 20 wt % were applied. The dry/wet phase inversion methods were used to produce the asymmetric flat sheet membrane. The prepared membranes were coated with silicone and N-Hexane in order to decrease the surface defect of the membrane. The best performance had found for membranes using treated zeolite where the selectivity was 3.3 for 15 % zeolite concentration at 3 bar operating pressure compare to the untreated zeolite . As a conclusion, it believe that surface modification of zeolite plays an important role to the incompatibility of zeolite and polymer to the formation of large free voids and it affected the overall selectivity and permeability.

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van Essen, Machiel, Esther Montrée, Menno Houben, Zandrie Borneman, and Kitty Nijmeijer. "Magnetically Aligned and Enriched Pathways of Zeolitic Imidazolate Framework 8 in Matrimid Mixed Matrix Membranes for Enhanced CO2 Permeability." Membranes 10, no. 7 (July 17, 2020): 155. http://dx.doi.org/10.3390/membranes10070155.

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Metal-organic frameworks (MOFs) as additives in mixed matrix membranes (MMMs) for gas separation have gained significant attention over the past decades. Many design parameters have been investigated for MOF based MMMs, but the spatial distribution of the MOF throughout MMMs lacks investigation. Therefore, magnetically aligned and enriched pathways of zeolitic imidazolate framework 8 (ZIF−8) in Matrimid MMMs were synthesized and investigated by means of their N2 and CO2 permeability. Magnetic ZIF−8 (m–ZIF−8) was synthesized by incorporating Fe3O4 in the ZIF−8 structure. The presence of Fe3O4 in m–ZIF−8 showed a decrease in surface area and N2 and CO2 uptake, with respect to pure ZIF−8. Alignment of m–ZIF−8 in Matrimid showed the presence of enriched pathways of m–ZIF−8 through the MMMs. At 10 wt.% m–ZIF−8 incorporation, no effect of alignment was observed for the N2 and CO2 permeability, which was ascribed anon-ideal tortuous alignment. However, alignment of 20 wt.% m–ZIF−8 in Matrimid showed to increase the CO2 diffusivity and permeability (19%) at 7 bar, while no loss in ideal selectivity was observed, with respect to homogeneously dispersed m–ZIF−8 membranes. Thus, the alignment of MOF particles throughout the matrix was shown to enhance the CO2 permeability at a certain weight content of MOF.

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Journal articles on the topic 'Mmmies'

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