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Готові списки джерел за темами / Fluidità di membrana

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Добірка наукової літератури з теми "Fluidità di membrana"

Автор: Grafiati

Опубліковано: 11 березня 2023

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Статті в журналах з теми "Fluidità di membrana"

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Abu-Salah, K. M., A. A. Alothman, and K. Y. Lei. "Lipid composition and fluidity of the erythrocyte membrane in copper-deficient rats." British Journal of Nutrition 68, no. 2 (1992): 435–43. http://dx.doi.org/10.1079/bjn19920101.

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The influence of dietary copper on lipid composition, phospholipid-fatty acid and protein profiles and fluidity of the erythrocyte membranes of rats is reported. In general Cu deficiency in rats induced some changes in the phospholipid-fatty acid profile of erythrocyte membranes when compared with Cu-adequate animals. Stearic (18:0) and docosadienoic (22:2n-3) acids contents, for example, were significantly increased (P< 0.001) while oleic (18:1n-9) and linolenic (18:3n-3) acid contents were significantly depressed (P< 0.001) as a result of Cu deficiency. Moreover the cholesterol:phospho

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2

Kleszczyńska, H., M. Oświęcimska, S. Witek, and S. Przestalski. "Inhibition of Lipid Peroxidation in the Erythrocyte Membrane by Quaternary Morpholinium Salts with Antioxidant Function." Zeitschrift für Naturforschung C 53, no. 5-6 (1998): 425–30. http://dx.doi.org/10.1515/znc-1998-5-620.

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Abstract The antioxidant activity of five new compounds from a group of quaternary ammonium salts with antioxidant function has been investigated. The effect of the compounds on the degree of lipid oxidation in the erythrocyte membrane subjected to UV radiation was studied. It was found that all the salts used decreased oxidation of the lipids in the erythrocyte membrane. The antioxidant activity of the ammonium salts studied increased with their alkyl chain length. Three compounds with the longest alkyl chains were the most active antioxidants, and their antioxidant properties were comparable

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3

Käkelä, Reijo, Minja Mattila, Martin Hermansson, et al. "Seasonal acclimatization of brain lipidome in a eurythermal fish (Carassius carassius) is mainly determined by temperature." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 294, no. 5 (2008): R1716—R1728. http://dx.doi.org/10.1152/ajpregu.00883.2007.

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Crucian carp ( Carassius carassius) is an excellent vertebrate model for studies on temperature adaptation in biological excitable membranes, since the species can tolerate temperatures from 0 to +36°C. To determine how temperature affects the lipid composition of brain, the fish were acclimated for 4 wk at +30, +16, or +4°C in the laboratory, or seasonally acclimatized individuals were captured from the wild throughout the year (temperature = +1 to +23°C), and the brain glycerophospholipid and sphingolipid compositions were analyzed in detail by electrospray-ionization mass spectrometry. Nume

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4

Severcan, F., та S. Cannistraro. "Model membrane partition ESR study in the presence of α-tocopherol by a new spin probe". Bioscience Reports 9, № 4 (1989): 489–95. http://dx.doi.org/10.1007/bf01117052.

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The effect of α-tocopherol (αT) on partitioning and fluidity changes occurring in phospholipid liposomes have been investigated by monitoring the X-band ESR spectrum of the high resolution amphiphilic spin probe perdeutero-di-t-butyl nitroxide (PDDTBN), which partitions in the lipid and water phase of liposomes, showing all the three resonances from each phase well resolved.

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Jurado, Amália S., Leonor M. Almeida, and Vítor M. C. Madeira. "Fluidity of bacterial membrane lipids monitored by intramolecular excimerization of 1,3-di(2-pyrenyl)propane." Biochemical and Biophysical Research Communications 176, no. 1 (1991): 356–63. http://dx.doi.org/10.1016/0006-291x(91)90932-w.

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Olchowik-Grabarek, Ewa, Szymon Sękowski, Agnieszka Kwiatek, et al. "The Structural Changes in the Membranes of Staphylococcus aureus Caused by Hydrolysable Tannins Witness Their Antibacterial Activity." Membranes 12, no. 11 (2022): 1124. http://dx.doi.org/10.3390/membranes12111124.

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Polyphenols, including tannins, are phytochemicals with pronounced antimicrobial properties. We studied the activity of two hydrolysable tannins, (i) gallotannin—1,2,3,4,5-penta-O-galloyl-β-D-glucose (PGG) and (ii) ellagitannin—1,2-di-O-galloyl-4,6-valoneoyl-β-D-glucose (dGVG), applied alone and in combination with antibiotics against Staphylococcus aureus strain 8324-4. We also evaluated the effect of these tannins on bacterial membrane integrity and fluidity and studied their interaction with membrane proteins and lipids. A correlation between the antimicrobial activity of the tannins and th

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Sulistiani, Fifih. "Pemeriksan Kadar Kolesterol Total Pada Perokok Aktif Filter." Jurnal Sehat Indonesia (JUSINDO) 2, no. 1 (2020): 12–17. http://dx.doi.org/10.36418/jsi.v2i1.9.

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Perokok dibagi menjadi tiga kelompok yaitu: Perokok ringan adalah perokok yang mengonsumsi satu hingga sepuluh batang rokok per hari. Perokok sedang adalah perokok yang mengkonsumsi belasan hingga dua puluh empat batang per hari.Sementara perokok berat mengkonsumsi lebih dari dua puluh empat batang per hari. Kolesterol merupakan lipid amfipatik yang penting dalam pengaturan permeabilitas dan fluiditas membran, dan juga sebagai lapisan luar lipoprotein plasma. Penelitian ini bertujuan untuk mengetahui kadar kolesterol pada perokok aktif dikelurahan jurumudi kota Tangerang. Penelitian ini bersif

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Couttas, Timothy Andrew, Yepy Hardi Rustam, Huitong Song, et al. "A Novel Function of Sphingosine Kinase 2 in the Metabolism of Sphinga-4,14-Diene Lipids." Metabolites 10, no. 6 (2020): 236. http://dx.doi.org/10.3390/metabo10060236.

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The number, position, and configuration of double bonds in lipids affect membrane fluidity and the recruitment of signaling proteins. Studies on mammalian sphingolipids have focused on those with a saturated sphinganine or mono-unsaturated sphingosine long chain base. Using high-resolution liquid chromatography-tandem mass spectrometry (LC-MS/MS), we observed a marked accumulation of lipids containing a di-unsaturated sphingadiene base in the hippocampus of mice lacking the metabolic enzyme sphingosine kinase 2 (SphK2). The double bonds were localized to positions C4–C5 and C14–C15 of sphingad

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Maciel, Danilo Pereira Garcia, José Leandro Tomaz Medeiros, Mariana Freitas da Silva, et al. "Profilo epidemiologico degli incidenti con esposizione a materiali biologici verificatisi nei lavoratori nello Stato di Amapá, Amazzonia, Brasile, dal 2015 al 2019." Revista Científica Multidisciplinar Núcleo do Conhecimento, March 8, 2021, 127–41. http://dx.doi.org/10.32749/nucleodoconhecimento.com.br/salute/esposizione-a-materiali.

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Le esposizioni accidentali con strumenti taglienti sono gli infortuni sul lavoro più comuni che coinvolgono professionisti e studenti in ambiente ospedaliero. L’incidente con materiale biologico (MB) deriva dal contatto diretto tra sangue e fluidi organici genitali o sierosi, con pelle malsana, membrane mucose o per inoculazione percutanea diretta attraverso oggetti appuntiti. L’obiettivo di questo lavoro è stato quello di caratterizzare il profilo epidemiologico degli incidenti con esposizione a materiali biologici avvenuti nei lavoratori nello stato di Amapá, Amazzonia, Brasile, nel periodo

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Andrino, Alberto, Georg Guggenberger, Sarmite Kernchen, Robert Mikutta, Leopold Sauheitl, and Jens Boy. "Production of Organic Acids by Arbuscular Mycorrhizal Fungi and Their Contribution in the Mobilization of Phosphorus Bound to Iron Oxides." Frontiers in Plant Science 12 (July 15, 2021). http://dx.doi.org/10.3389/fpls.2021.661842.

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Most plants living in tropical acid soils depend on the arbuscular mycorrhizal (AM) symbiosis for mobilizing low-accessible phosphorus (P), due to its strong bonding by iron (Fe) oxides. The roots release low-molecular-weight organic acids (LMWOAs) as a mechanism to increase soil P availability by ligand exchange or dissolution. However, little is known on the LMWOA production by AM fungi (AMF), since most studies conducted on AM plants do not discriminate on the LMWOA origin. This study aimed to determine whether AMF release significant amounts of LMWOAs to liberate P bound to Fe oxides, whic

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Дисертації з теми "Fluidità di membrana"

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BRAMBILLA, ANNA. "Effetti della deprivazione di ossigeno e glucosio (OGD) sulla fluidità di membrana e sulla modulazione dell'attività di bace1 in cellule endoteliali del microcircolo cerebrale di ratto (RBE4)." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2013. http://hdl.handle.net/10281/84854.

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La barriera ematoencefalica (BEE) costituisce l’interfaccia tra l’encefalo e il torrente ematico e garantisce il corretto funzionamento del sistema nervoso centrale (SNC) mantenendo l’omeostasi cerebrale entro ristretti limiti fisiologici. Infatti, a livello delle cellule endoteliali di barriera, la presenza di un elevato numero di giunzioni strette (tight junctions, TJ) e l’espressione asimmetrica di specifici trasportatori di membrana assicura una fine regolazione del flusso di sostanze in entrata e in uscita dall’encefalo [Enciu et al., 2013; Lakhan et al., 2013; Abbott and Friedman, 2012;

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Тези доповідей конференцій з теми "Fluidità di membrana"

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Gill, John J., Ken Ho, and Gregory P. Carman. "The Fabrication of Thin Film NiTi Shape Memory Alloy Micro Actuator for MEMS Application." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0536.

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Abstract Thin film SMA (Shape memory alloy) is a useful method for MEMS (Microelectromechanical Systems) actuator. This is because the thin film has an improved frequency response compared to bulk SMA, high work density, and produces large strain. A novel two-way thin film NiTi (Nickel Titanium) shape memory alloy actuator is presented in this paper. Thin film shape memory alloy is sputter-deposited onto a silicon wafer in an ultra high vacuum system. Transformation temperatures of the deposited NiTi film are measured by residual stress measurement at temperatures from 25 ° C to 120 ° C. Test

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