Results 91 to 100 of about 122,170 (318)

Induction Kinetics of Photosystem I-Activated P700 Oxidation in Plant Leaves and Their Dependence on Pre-Energization [PDF]

open access: yes, 2010
Absorbance changes ¿A 810 were measured in pea (Pisum sativum L., cv. Premium) leaves to track redox transients of chlorophyll P700 during and after irradiation with far red (FR) light under various preillumination conditions in the absence and presence ...
Bulychev, A.A., Vredenberg, W.J.
core   +2 more sources

Delineation of gastrointestinal tumors biopsies using a fluorescence lifetime imaging optical fiber probe

open access: yesJournal of Biophotonics, EarlyView.
The efficient discrimination of a hepatic cancer lesion and its surgical margin using autofluorescence lifetime imaging is presented. White light image of the specimen on the left and the augmented image with fluorescence lifetime data on the right.
D. Suraci   +9 more
wiley   +1 more source

Cofactor Fingerprinting with STD NMR to Characterize Proteins of Unknown Function: Identification of a Rare cCMP Cofactor Preference [PDF]

open access: yes, 2004
Proteomics efforts have created a need for better strategies to functionally categorize newly discovered proteins. To this end, we have employed saturation transfer difference NMR with pools of closely related cofactors, to determine cofactor preferences.
Sem, Daniel, Yao, Huili
core   +1 more source

The retina visual cycle is driven by cis retinol oxidation in the outer segments of cones [PDF]

open access: yes, 2017
Vertebrate rod and cone photoreceptors require continuous supply of chromophore for regenerating their visual pigments after photoactivation. Cones, which mediate our daytime vision, demand a particularly rapid supply of 11-cis retinal chromophore in ...
Cornwall, M. Carter   +3 more
core   +2 more sources

Salinity Induces Granal Development in Bundle Sheath Chloroplasts of NADP-Malic Enzyme Type C4 Plants

open access: yesPlant Production Science, 2009
In NADP-malic enzyme (NADP-ME) type C4 plants, MC chloroplasts have well-developed grana, whereas BSC chloroplasts are generally characterized by highly reduced grana.
Eiji Omoto   +3 more
doaj   +1 more source

Magnesium deficiency-induced changes in organic acid metabolism of Citrus sinensis roots and leaves

open access: yesBiologia Plantarum, 2013
Organic acid (OA) metabolisms are of fundamental importance but very limited data are available on the responses of plant OA metabolisms to Mg-deficiency. Seedlings of Citrus sinensis (L.) Osbeck cv. Xuegan were irrigated with Mg-deficient (0, 50, or 500
L.T. Yang   +5 more
doaj   +1 more source

Nitrous oxide and methane production and emission in wetlands receiving nonpoint source nitrate loads

open access: yesJournal of Environmental Quality, EarlyView.
Abstract Although wetland restoration is a promising strategy to reduce nonpoint source nitrogen (N) loads, there is some concern over the potential for increased nitrous oxide (N2O) emissions. We examined the production and emission of N2O and methane (CH4) from wetlands designed to intercept and reduce elevated, nonpoint source nitrate (NO3−) loads ...
Hannah L. Ampe   +3 more
wiley   +1 more source

TP53-inducible Glycolysis and Apoptosis Regulator (TIGAR) Metabolically Reprograms Carcinoma and Stromal Cells in Breast Cancer. [PDF]

open access: yes, 2016
A subgroup of breast cancers has several metabolic compartments. The mechanisms by which metabolic compartmentalization develop in tumors are poorly characterized. TP53 inducible glycolysis and apoptosis regulator (TIGAR) is a bisphosphatase that reduces
Bartrons, Ramon   +15 more
core   +2 more sources

Seasonal patterns in B‐vitamins and cobalamin co‐limitation in the Northwest Atlantic

open access: yesLimnology and Oceanography, EarlyView.
Abstract B‐vitamins are important co‐enzymes that have long been hypothesized to play key roles in marine ecosystems. However, environmental measurements remain scarce, which limits our understanding of their potential impact. Here, we present mass spectrometry‐based measurements of B‐vitamins (B1, B2, B3, B5, B6, B12) and related vitamers along a ...
Catherine Bannon   +9 more
wiley   +1 more source

Regulation of Leaf Senescence by Cytokinin, Sugars, and Light. Effects on NADH-Dependent Hydroxypyruvate Reductase [PDF]

open access: yes, 1998
The aim of this study was to investigate the interactions between cytokinin, sugar repression, and light in the senescence-related decline in photosynthetic enzymes of leaves. In transgenic tobacco (Nicotiana tabacum) plants that induce the production of
Lea, P.J.   +4 more
core   +1 more source

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