Membrane permeability

Ebook "Mitochondria and cell death" examines the role of mitochondria in different types of cell death, including apoptotic and necrotic cell deaths. Topics discussed include mitochondrial outer membrane permeabilization (MOMP) and the permeability transition pore; core processes such as calcium handling, fission and fusion, reactive oxygen species generation, and maintenance of mitochondrial DNA fidelity and protein folding homeostasis; and retrograde signaling between mitochondria and other cellular components, including the important role of mitochondria in antiviral immunity.

242p tracanhphuonghoa1007 22-04-2024 2 2   Download

Part 1 book "Neuroscience" includes content: Electrical signals of nerve cells; voltage dependent membrane permeability; channels and transporters; synaptic transmission; neurotransmitters and their receptors; molecular signaling within neurons; synaptic plasticity; the somatic sensory system - touch and proprioception; pain, vision - the eye; central visual pathways.

338p muasambanhan03 02-01-2024 4 2   Download

Ebook "Oxygen transport to tissue XXXIX" presents all aspects of delivery of oxygen to tissues and tumors in peer reviewed short articles. Both overview and the most recent, advanced techniques for oxygen measurement are presented. Articles and peer reviewers include those from leaders in their field.

427p lucchinguyen 28-12-2023 4 2   Download

Recent achievements in cancer therapy are the use of alternating electrical fields at intermediate frequencies (100–300 kHz) and low intensities (1–3 V/cm), which specifically target cell proliferation while affecting diferent cellular activities depending on the frequency used.

13p vioracle 29-09-2023 9 3   Download

Nephrogenic ascites is described as a clinical condition of refractory ascites in patients with end-stage renal disease (ESRD) on renal replacement therapy. This entity was first described in 1970. Many nephrologists do not believe in nephrogenic ascites. The underlying etiologies can be multifactorial including a combination of poor nutrition, inadequate dialysis and ultrafiltration, increased peritoneal membrane permeability, and overall uremia.

4p viintuit 26-09-2023 2 0   Download

Forward osmosis (FO) has received considerable interest for water and energy-related applications in recent years. However, FO has not been commercialized yet because of a few reasons. The lack of a high-performance FO membrane is one of the important barriers.

11p viannee 02-08-2023 6 3   Download

To characterize the cellular stress by n-alkanols with different alkyl chain lengths in Escherichia coli, we investigated how n-alkanols damage cell envelope permeability and whether they enhance the promoter activity of the envelope stress response regulator, σE , by using variants of green fluorescent protein (GFP)

14p vicaptainmarvel 21-04-2023 5 2   Download

Drought is among the most crucial limiting factors for crop production and is considered a major threat to food security. Rootstock selection is an important approach for drought management. This research was aimed to study the responses of important rootstocks against drought stress and to examine the impacts of melatonin application on the drought stress of these rootstocks. Carrizo citrange, fying dragon, and sour orange were selected for the current study.

16p lyhuyenthu 31-01-2023 6 2   Download

Zeolite-polymer mixed matrix membranes were prepared by filling polydimethylsiloxane (PDMS) with clinoptilolite in various cationic forms of K, Mg, H, and Na. The membranes were characterized by scanning electron microscopy as well as measurements of O2, N2, and CO2 gas permeabilities. The results indicated the presence of an optimum zeolite loading in the mixed matrix membranes maximizing permeability.

9p tudichquannguyet 29-11-2021 4 1   Download

This study introduces a new production method to use as a porous silicon-based proton exchange membrane for µDMFCs. In this respect, EIS, fuel crossover test, and fuel cell performance test at the µDMFC sample cell are performed at room temperature on a porous silicon-based membrane that was produced for passive mode µDMFC as a proton exchange membrane. The reason for performing the fuel crossover test is to ensure the silicon opened pores along the silicon wafer and to examine the fuel permeability of the membrane.

11p tudichquannguyet 29-11-2021 15 1   Download

The blood–brain barrier (BBB) is a control mechanism that limits the diffusion of many substances to the central nervous system (CNS). In this study, we designed an in-vitro 3-dimensional BBB system to obtain a fast and reliable model to mimic drug delivery characteristics of the CNS. A support membrane of polycaprolactone nanofiber surfaces was prepared using electrospinning. After confirming the fiber morphology and size, endothelial cells (HUVEC) and glial cells were cultured on either side of this membrane.

12p thiencuuchu 27-11-2021 13 1   Download

Cauliflower (Brassica oleracea L. var. botrytis) inflorescences are composed mainly of meristematic tissue, which has a high cellular proliferation. This considerable cellular density makes the inflorescence an organ with a large proportion of membranes.

12p vijichea2711 28-05-2021 9 1   Download

Frequent freeze-thaw phenomena, together with widely used deicing salt and intense acid precipitation, often occur in northeastern China, causing damage to various aspects of plants, such as the permeability of biological membranes, osmotic adjustment, and photosystems.

9p vijichea2711 28-05-2021 15 1   Download

This chapter presents the following content: Cellular membranes are fluid mosaics of lipids and proteins, membranes structure results in selective permeability, passive transport in diffusion of a substance across a membrane with no energy investment, active transport uses energy to move solutes against their gradients, bulk transport across the plasma membrane occurs by exocytosis and endocytosis.

60p tradaviahe14 27-01-2021 13 1   Download

Natural-product-based drugs commonly were converted to organic or inorganic salts due to better stability, solubility or membrane-permeability of new salts compared to the drug itself. In this report, succinate oxime ester of dipterocarpol was synthesized successfully in a simple column chromatography-free isolation process.

7p vimississippi2711 08-12-2020 13 1   Download

Resistance to carbapenems are because of various mechanisms like mutations in the outer membrane proteins like Opr D causing decreased permeability of the drugs, the carbapenem hydrolyzing enzymes–carbapenemases and the efflux mechanisms. Carbapenem resistance was studied in 140 non-repeat clinical isolates of Pseudomonas aeruginosa in a tertiary care hospital. Imipenem resistance was detected using Kirby Bauer’s standard disc diffusion method. MIC for Imipenem was detected in all resistant isolates using E-test strips.

7p chauchaungayxua6 26-06-2020 14 2   Download

The width of the air space was controlled by the change in the number of plastic mesh in the permeability chamber. The results showed that the quality of permeate solution was identical with the quality of normal distillate water and the desalination efficiency of AGMD module strongly depended on the feed temperature, air-gap. The optimum condition found was 60 °C of feed temperature and air-gap width of 5 mm, then the water recovery flux reached 2.5 L.m-2 .h-1 .

7p mangamanga 29-02-2020 25 0   Download

Fouling due to organic matters from surface water has been always of concerns as it affects the water production and membrane lifespan. It's the fouling that hinders the wide application of membrane technology in water treatment field. This study aims to investigate the fouling mechanism, which mostly impacts the water permeability via empirical modeling.

7p vinobita2711 31-05-2019 13 0   Download

The effect of water deficit on growth and some physiological and biochemical parameters related to water deficit tolerance was studied in 4 Moroccan alfalfa Medicago sativa L. populations that originated from the mountains and oases of Morocco.

10p vi4mua 24-02-2019 16 0   Download

The effects of hypoxia on the activities of some enzymes of antioxidative, non-enzymatic scavenging system, membrane permeability, lipid peroxidation, and some reactive oxygen species (ROS) in leaves of Zea mays were investigated. Samples were taken 48, 96, 144, and 192 h after the start of hypoxia treatment.

8p vitamix 15-02-2019 30 1   Download