Presentation by Dave McGregor of DuPont

The Lagos State Police Command has rescued an unidentified woman shortly after she gave birth.   She delivered the baby at a section of the Lekki-Ajah expressway on Friday. Good spirited Nigerians had called operatives of the Rapid Response Squad (RRS) to the scene. The Police said the mother has four other children and are […]

Police rescue homeless mother of 4 who gave birth on Lagos road [Photos]

Background The Procuring Authority has engaged the International Finance Corporation, acting through its Public Private Partnerships Transaction Advisory Services division, to act as lead transaction advisor in relation to the Project. The RFQ will ...

(MENAFN - Trend News Agency) BAKU, Azerbaijan, May 9 Trend: The May edition of the influential Russian magazine "Natsionalnaya Oborona" (National Defe... ......

A photographer from Turkey shot riveting time-lapse photos of the night sky from eastern Bingöl and Elazığ provinces.

After two decades of dryness, enough rains have finally come to bring Hamoun wetland back to life in the southeastern Iranian province of Sistan-Baluchestan, reviving agriculture in the region as well. Hamoun is the third-largest lake of Iran after the Caspian Sea and Urmia Lake.

Ajay Devgn is spending quality time with wife Kajol and kids Nysa and Yug Devgn amid lockdown

The photo, Reese Witherspoon shared, is from the premiere of the film "Nowhere" in 1997

Samina Ahmed and Manzar Sehbai took fans by surprise after they got married earlier last month

Jennifer Aniston shared a very strong message against coronavirus, asking the novel illness to just go away

Kim Kardashian on Friday said she has started missing her sisters.

A basic rule of quantum physics is that knowing too much about an experiment will break quantum interference, but now physicists have discovered a way to bend that rule

An aerial view of crabeater seals in Antarctica, mating damselflies and a twilight rocket launch were among the most lauded entries to the inaugural Nature TTL Photographer of the Year award

At Unseen Amsterdam, striking images of a melting glacier are stirring visitors to action

On Christmas Eve 1968, Apollo 8 became the first crewed spacecraft to circle the moon. Emerging from its dark side, one astronaut reached for his camera

Corners of unexpected planetary beauty are revealed in these stunning images on display in The Elevated Eye at Forest Lawn Museum, California

An aerial view of crabeater seals in Antarctica, mating damselflies and a twilight rocket launch were among the most lauded entries to the inaugural Nature TTL Photographer of the Year award

Kate, Britain's Duchess of Cambridge, launched a project on Thursday to encourage Britons to submit pictures of their daily lives during lockdown. Edward Baran reports.

Kate, Britain's Duchess of Cambridge, launched a project on Thursday to encourage Britons to submit pictures of their current daily lives and the work of "Helpers and Heroes" to capture a snapshot of the nation in coronavirus lockdown.

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Blue-light-induced chloroplast movements play an important role in maximizing light utilization for photosynthesis in plants. Under a weak light condition, chloroplasts accumulate to the cell surface to capture light efficiently (chloroplast accumulation response). Conversely, chloroplasts escape from strong light and move to the side wall to reduce photodamage (chloroplast avoidance response). The blue light receptor phototropin (phot) regulates these chloroplast movements and optimizes leaf photosynthesis by controlling other responses in addition to chloroplast movements. Seed plants such as Arabidopsis (Arabidopsis thaliana) have phot1 and phot2. They redundantly mediate phototropism, stomatal opening, leaf flattening, and the chloroplast accumulation response. However, the chloroplast avoidance response is induced by strong blue light and regulated primarily by phot2. Phots are localized mainly on the plasma membrane. However, a substantial amount of phot2 resides on the chloroplast outer envelope. Therefore, differentially localized phot2 might have different functions. To determine the functions of plasma membrane- and chloroplast envelope-localized phot2, we tethered it to these structures with their respective targeting signals. Plasma membrane-localized phot2 regulated phototropism, leaf flattening, stomatal opening, and chloroplast movements. Chloroplast envelope-localized phot2 failed to mediate phototropism, leaf flattening, and the chloroplast accumulation response but partially regulated the chloroplast avoidance response and stomatal opening. Based on the present and previous findings, we propose that phot2 localized at the interface between the plasma membrane and the chloroplasts is required for the chloroplast avoidance response and possibly for stomatal opening as well.

Members of the light-harvesting complex protein family participate in multiple processes connected with light sensing, light absorption, and pigment binding within the thylakoid membrane. Amino acid residues of the light-harvesting chlorophyll a/b-binding proteins involved in pigment binding have been precisely identified through x-ray crystallography experiments. In vitro pigment-binding studies have been performed with LIGHT-HARVESTING-LIKE3 proteins, and the pigment-binding ability of cyanobacterial high-light-inducible proteins has been studied in detail. However, analysis of pigment binding by plant high-light-inducible protein homologs, called ONE-HELIX PROTEINS (OHPs), is lacking. Here, we report on successful in vitro reconstitution of Arabidopsis (Arabidopsis thaliana) OHPs with chlorophylls and carotenoids and show that pigment binding depends on the formation of OHP1/OHP2 heterodimers. Pigment-binding capacity was completely lost in each of the OHPs when residues of the light-harvesting complex chlorophyll-binding motif required for chlorophyll binding were mutated. Moreover, the mutated OHP variants failed to rescue the respective knockout (T-DNA insertion) mutants, indicating that pigment-binding ability is essential for OHP function in vivo. The scaffold protein HIGH CHLOROPHYLL FLUORESCENCE244 (HCF244) is tethered to the thylakoid membrane by the OHP heterodimer. We show that HCF244 stability depends on OHP heterodimer formation and introduce the concept of a functional unit consisting of OHP1, OHP2, and HCF244, in which each protein requires the others. Because of their pigment-binding capacity, we suggest that OHPs function in the delivery of pigments to the D1 subunit of PSII.

Actuation remains a significant challenge in soft robotics. Actuation by light has important advantages: Objects can be actuated from a distance, distinct frequencies can be used to actuate and control distinct modes with minimal interference, and significant power can be transmitted over long distances through corrosion-free, lightweight fiber optic cables....

Aerosol–radiation interaction (ARI) plays a significant role in the accumulation of fine particulate matter (PM2.5) by stabilizing the planetary boundary layer and thus deteriorating air quality during haze events. However, modification of photolysis by aerosol scattering or absorbing solar radiation (aerosol–photolysis interaction or API) alters the atmospheric oxidizing capacity, decreases...