جستجوی مقالات مرتبط با کلیدواژه "نانوذرات مغناطیسی میکروبی" در نشریات گروه "علوم"

Nowadays, magnetotactic bacteria have attracted the attention of scientists due to their green synthesis of nanoparticles. Magnetic nanoparticles enclose within the magnetosome; the bacterial intracellular organelle with a double-layered membrane which causes them to taxi the south and north poles of the earth. Bacteria synthesize magnetosomes in low oxygen conditions. Magneto-tactic bacteria are often isolated from the water sediments. All the magnetosome-forming bacteria are Gram-negative. Until now all of the identified Magnetotactic bacteria are among 13 phyla of 34 culturable phyla: Proteobacteria, Nitrospirota, Omnitrophota, Latescibacterota, Planctomycetota, Nitrospinota, Hydrogenedentota, Elusimicrobiota, Fibrobacterota, Riflebacteria, Bdellovibrionota, UBA1019, and desulfobacterota. The origin of magnetic behavior and magnetosome genes among all MTB is supposed to be acquired by horizontal gene transfer in different phyla. Magnetotactic bacteria have an -891gene core genome related to magnetotaxis named the magnetosome island. Some of the genes associated with proteins as Mam B, MamQ, MamT, MamM, MamK, and MamA (Mam: magnetosome membrane) are essential for magnetosome formation. Magnetosomes have various applications, such as sensing, diagnostics, remediation, immobilization of catalysts, and targeted delivery. Biosynthetic magnetite nanoparticles compared to those synthetic chemicals have exciting properties: they are permanently magnetic at room temperature, have high purity, and illustrate a uniform shape and size, low toxicity due to their membrane envelope, ferrimagnetic attributes, and dispersal capability, which are essential for their potential industrial applications. Due to the importance of magnetosomes in various applications and their unique characteristics, it is necessary to find and identify new sources and new bacteria