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Photosynthesis
Published in Thomas M. Nordlund, Peter M. Hoffmann, Quantitative Understanding of Biosystems, 2019
Thomas M. Nordlund, Peter M. Hoffmann
The circular arrangement of pigments in purple bacteria may be a consequence of subunit symmetry and self-assembly processes. We will see that these primitive, symmetric systems allow elegant quantum treatments, but do the more closely packed and seemingly random chlorophyll networks found in cyanobacteria and plants, have an advantage? The profusion of green plants and cyanobacteria on Earth suggests that their photosystems are well adapted to many ecological niches, but does a more unified, complicated structure have a light-harvesting advantage?
Microorganisms in Industrial Microbiology and Biotechnology
Published in Nduka Okafor, Benedict C. Okeke, Modern Industrial Microbiology and Biotechnology, 2017
Nduka Okafor, Benedict C. Okeke
The Proteobacteria are a major group of bacteria named after Proteus, the Greek god, who could change his shape. Proteobacteria include a wide variety of pathogens, such as Escherichia, Salmonella, Vibrio and Helicobacter spp. as well as free-living bacteria some of which can fix nitrogen. The group also includes the purple bacteria, so-called because of their reddish pigmentation and which use energy from sun light in photosynthesis.
Soil Microbial Dynamics in Carbon Farming of Agro-Ecosystems
Published in Ashok Kumar, Swati Sharma, 2 Utilization, 2020
Jinus S. Senjam, Kangjam Tilotama, Tracila Meinam, Dhanaraj Singh Thokchom, Yumlembam Rupert Anand, Thoudam Santosh Singh, Koijam Melanglen, Hanglem Sonibala Devi, Khumukcham Nongalleima, S. Gurumurthy, Thiyam Jefferson Singh
They are part of a group of Proteobacteria that are capable of photosynthesis and are collectively cited as purple bacteria. They are anaerobic or microaerophilic. Often, they are found in stratified water environment comprising hot springs, stagnant water bodies, etc (Daldal et al. 2008). They play an important role in primary production, which suggests that these organisms can affect the carbon cycle through the process of carbon fixation (Storelli et al. 2013). In 1931, Van Niel represented the overall reaction of photosynthesis. He outlined his investigation as the following formulas: Inpurplebacteria: CO2+1/2(HS)−+ H2O ………..light……(CH2O)+(HSO4)−Ingreenbacteria: light CO2+ H2S −light→(CH2O)+ H2O +2S
Synthesis of Cu–Ag nanoparticles by biological method
Published in Inorganic and Nano-Metal Chemistry, 2018
Hamid Reza Ghorbani, Roya Rashidi
In the present work, we investigated the green chemistry method to synthesis Cu-Ag alloy nanoparticles using Rhodopseudomonas capsulata. R. capsulata is a species of purple bacteria, a group of bacteria that can obtain energy through photosynthesis a Photosynthetic bacterium. In this study, the size of the nanoparticles was measured by dynamic light scattering (DLS) and the morphology of nanoparticles was observed using transmission electron microscopy (TEM).