[et_pb_section admin_label=“Sektion“ fullwidth=“on“ specialty=“off“][et_pb_fullwidth_image admin_label=“Volle Breite des Bildes“ src=“https:\/\/www.scivit.de\/lang\/wp-content\/uploads\/2016\/11\/teaserb-6.png“ alt=“Rising methane from the tropics“ title_text=“Rising methane from the tropics“ show_in_lightbox=“off“ url_new_window=“off“ use_overlay=“off“ animation=“left“ use_border_color=“on“ border_color=“#0c71c3″ border_style=“solid“ border_width=“2px“] [\/et_pb_fullwidth_image][\/et_pb_section][et_pb_section admin_label=“section“][et_pb_row admin_label=“Zeile“][et_pb_column type=“4_4″][et_pb_post_title admin_label=“Posttitel“ title=“on“ meta=“on“ author=“on“ date=“on“ categories=“on“ comments=“on“ featured_image=“off“ featured_placement=“below“ parallax_effect=“on“ parallax_method=“on“ text_orientation=“left“ text_color=“dark“ text_background=“off“ text_bg_color=“rgba(255,255,255,0.9)“ module_bg_color=“rgba(255,255,255,0)“ title_all_caps=“off“ use_border_color=“off“ border_color=“#ffffff“ border_style=“solid“] [\/et_pb_post_title][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=“Zeile“][et_pb_column type=“4_4″][et_pb_text admin_label=“Text“ background_layout=“light“ text_orientation=“left“ use_border_color=“off“ border_color=“#ffffff“ border_style=“solid“ text_font_size=“18″]<\/p>\n
Similar to carbon dioxide, methane is absorbing heat radiation in the atmosphere preventing it from leaving into space. It is doing this much more efficiently when compared to carbon dioxide. Since methane is less abundant in the atmosphere than carbon dioxide, however, it is not the primary factor driving global warming. In addition atmospheric methane is transformed into carbon dioxide with an atmospheric lifetime of about 8 years.<\/p>\n
While atmospheric methane was at stable levels between 2000 and 2007, levels have clearly increased since then. To analyze the reasons for this increase, Nisbet and colleagues studied data from regional measurements of methane concentrations and isotope ratios. While measurements from all areas show similar trends, the increase is strongest in the tropical regions. The decrease in the carbon isotope <sup>13<\/sup>C observed in all measurements argues for biological methan sources and excludes fossil sources. Most likely sources are therefore natural tropical wetlands, rice paddies and ruminants from the tropics.<\/p>\n
With the importance of methane as a greenhouse gas in mind, Zhang an colleagues established a biogeochemical model for methane production by rice cultivation. The ever-growing area used for rice cultivation and the increasing practice of continous flooding of rice cultures were identified as the main drivers of methane production.<\/p>\n
Source:\u00a0 Nisbet et al., Global Biogeochem. Cycles 30, 1356 \u2013 1370<\/a>\/\/Zhang et al., Global Biogeochem. Cycles 30, doi:10.1002\/2016GB005381<\/a><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=“Zeile“][et_pb_column type=“4_4″][et_pb_image admin_label=“Bild“ src=“https:\/\/www.scivit.de\/lang\/wp-content\/uploads\/2016\/11\/Gesamtb-8.png“ alt=“Rising methane from the tropics“ title_text=“Rising methane from the tropics“ show_in_lightbox=“off“ url_new_window=“off“ use_overlay=“off“ animation=“left“ sticky=“off“ align=“left“ force_fullwidth=“off“ always_center_on_mobile=“on“ use_border_color=“off“ border_color=“#ffffff“ border_style=“solid“] [\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=“Zeile“][et_pb_column type=“4_4″][et_pb_text admin_label=“Links“ background_layout=“light“ text_orientation=“left“ use_border_color=“off“ border_color=“#ffffff“ border_style=“solid“ text_font_size=“18″]<\/p>\n Scivit News – Visual Science<\/a><\/p>\n More illustrations from Scivit<\/a><\/p>\n More videos from Scivit<\/a><\/p>\n Have a video abstract based on this cartoon (300 Euro)<\/a><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=“Zeile“ global_module=“619″ make_fullwidth=“off“ use_custom_width=“off“ width_unit=“on“ use_custom_gutter=“off“ padding_mobile=“off“ allow_player_pause=“off“ parallax=“off“ parallax_method=“off“ make_equal=“off“ parallax_1=“off“ parallax_method_1=“off“ column_padding_mobile=“on“][et_pb_column type=“4_4″][et_pb_post_nav global_parent=“619″ admin_label=“Beitragsnavigierung“ in_same_term=“off“ hide_prev=“off“ hide_next=“off“ prev_text=“Previous News“ next_text=“Further News“ use_border_color=“off“ border_color=“#ffffff“ border_style=“solid“ title_font_size=“18px“] [\/et_pb_post_nav][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":" [et_pb_section admin_label=“Sektion“ fullwidth=“on“ specialty=“off“][et_pb_fullwidth_image admin_label=“Volle Breite des Bildes“ src=“https:\/\/www.scivit.de\/lang\/wp-content\/uploads\/2016\/11\/teaserb-6.png“ alt=“Rising methane from the tropics“ title_text=“Rising methane from the tropics“ show_in_lightbox=“off“ url_new_window=“off“ use_overlay=“off“ animation=“left“ use_border_color=“on“ border_color=“#0c71c3″ border_style=“solid“ border_width=“2px“] [\/et_pb_fullwidth_image][\/et_pb_section][et_pb_section admin_label=“section“][et_pb_row admin_label=“Zeile“][et_pb_column type=“4_4″][et_pb_post_title admin_label=“Posttitel“ title=“on“ meta=“on“ author=“on“ date=“on“ categories=“on“ comments=“on“ featured_image=“off“ featured_placement=“below“ parallax_effect=“on“ parallax_method=“on“ text_orientation=“left“ text_color=“dark“ text_background=“off“ text_bg_color=“rgba(255,255,255,0.9)“ module_bg_color=“rgba(255,255,255,0)“ title_all_caps=“off“ use_border_color=“off“ border_color=“#ffffff“ border_style=“solid“] [\/et_pb_post_title][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=“Zeile“][et_pb_column type=“4_4″][et_pb_text admin_label=“Text“ […]<\/p>\n","protected":false},"author":1,"featured_media":1172,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":" [et_pb_section admin_label=\"Sektion\" fullwidth=\"on\" specialty=\"off\"][et_pb_fullwidth_image admin_label=\"Volle Breite des Bildes\" src=\"https:\/\/www.scivit.de\/lang\/wp-content\/uploads\/2016\/11\/teaserb-6.png\" alt=\"Rising methane from the tropics\" title_text=\"Rising methane from the tropics\" show_in_lightbox=\"off\" url_new_window=\"off\" use_overlay=\"off\" animation=\"left\" use_border_color=\"on\" border_color=\"#0c71c3\" border_style=\"solid\" border_width=\"2px\"] [\/et_pb_fullwidth_image][\/et_pb_section][et_pb_section admin_label=\"section\"][et_pb_row admin_label=\"Zeile\"][et_pb_column type=\"4_4\"][et_pb_post_title admin_label=\"Posttitel\" title=\"on\" meta=\"on\" author=\"on\" date=\"on\" categories=\"on\" comments=\"on\" featured_image=\"off\" featured_placement=\"below\" parallax_effect=\"on\" parallax_method=\"on\" text_orientation=\"left\" text_color=\"dark\" text_background=\"off\" text_bg_color=\"rgba(255,255,255,0.9)\" module_bg_color=\"rgba(255,255,255,0)\" title_all_caps=\"off\" use_border_color=\"off\" border_color=\"#ffffff\" border_style=\"solid\"] [\/et_pb_post_title][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=\"Zeile\"][et_pb_column type=\"4_4\"][et_pb_text admin_label=\"Text\" background_layout=\"light\" text_orientation=\"left\" use_border_color=\"off\" border_color=\"#ffffff\" border_style=\"solid\" text_font_size=\"18\"]<\/p> Mitochondria are the powerhouses of oxygen-consuming organisms and respiratory complexes are the very turbines of this powerhouse. Basically they are catalyzing an oxyhydrogen reaction with the energy not being released in a bang, but being stored in chemical form. Respiratory complexes are made from many subunit proteins and the elucidation of their structures was a major achievement in structural biology. Thanks to cryo-electronmicroscopy higher aggregation forms of these complexes become accessible to scientists.<\/p> The inner mitochondrial membrane, the place where respiration ultimately takes place, is tightly packed with proteins. Given the fact that the energy liberated in respiration is stored in a proton-gradient across the inner membrane, a thight package of respiratory complexes makes also sense energetically. Complex V has been demonstrated to occur in dimeric rows along the cristae (https:\/\/www.scivit.de\/lang\/archive\/634). For the other complexes there seems to be more flexibility and various supercomplexes could be isolated so far. The structure of the most prominent, mammalian-type complex has been elucidated by Gu and colleagues. Ultimately also these supercomplexes seem to be arranged in strings or rows of higher steric order in the inner mitochondrial membrane (Biochimica et Biophysica Acta 1787, 672 \u2013 680, Biochimica et Biophysica Acta 1787, 60\u201367).<\/p> Source:\u00a0 Gu et al., Nature, doi:10.1038\/nature19359<\/a><\/p> [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=\"Zeile\"][et_pb_column type=\"4_4\"][et_pb_image admin_label=\"Bild\" src=\"https:\/\/www.scivit.de\/lang\/wp-content\/uploads\/2016\/11\/Gesamt-3.jpg\" alt=\"Respiratory supercomplex from pig's heart\" title_text=\"Respiratory supercomplex from pig's heart\" show_in_lightbox=\"off\" url_new_window=\"off\" use_overlay=\"off\" animation=\"left\" sticky=\"off\" align=\"left\" force_fullwidth=\"off\" always_center_on_mobile=\"on\" use_border_color=\"off\" border_color=\"#ffffff\" border_style=\"solid\"] [\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=\"Zeile\"][et_pb_column type=\"4_4\"][et_pb_text admin_label=\"Links\" background_layout=\"light\" text_orientation=\"left\" use_border_color=\"off\" border_color=\"#ffffff\" border_style=\"solid\" text_font_size=\"18\"]<\/p> Scivit News - Visual Science<\/a><\/p> More illustrations from Scivit<\/a><\/p>Structure and function of respiratory complexes<\/h3>
Higher aggregation forms of respiratory complexes<\/h3>