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Fig. 3. A in Silicified and phosphatized Tianzhushania, spheroidal microfossils of possible animal origin from the Neoproterozoic of South China
Fig. 3. A. Tianzhushania sp. with possible two−cell stage cleavage from thin sections of chert in the Weng'an area, MESIG 10003 (44/89.6); A1, general view, showing the wall and internal structures; note that the internal body is cleaved into two; arrow shows position of A2; A2, enlarged view of A1, showing details of the structure of the envelope. B. Typical Tianzhushania spinosa Yin and Li, 1978, found in a chert nodule from eastern Yangtze Gorges, MESIG 10006 (40.1/94.2); B1, general view, for comparison with the specimen (Fig. 2A) found in the Weng'an area (arrow shows position of B2); B2, enlarged view of B1, showing details of the structure of the wall (arrow points to external membrane between two bundles of processes).
Fig. 6 in Silicified and phosphatized Tianzhushania, spheroidal microfossils of possible animal origin from the Neoproterozoic of South China
Fig. 6. Phosphatized Tianzhushania ornata (Xiao and Knoll, 2000) comb. nov. in Doushantuo phosphorites at Weng'an. A. MESIG 21042; A2, detail of A1, showing a part of outer covering surrounding the envelope with tubercles. B. MESIG 21045, specimen preserving part of outer covering. C. MESIG 21064; note the internal membrane. D. MESIG 20303, showing shrunken internal body with membrane and secondary overgrowth on internal body. E. MESIG 20190, polygons with fractal branching; note numerous dimples at top. F. MESIG 21076; F2, detail of F1, showing details of irregularly distributed dimples. G. MESIG 21078, polygonal envelope ornamentation; note that dimples also occur on arches. H. MESIG 21009; H2, detail of H1, showing deflated envelope and details of envelope ornamentation. I. MESIG 21026, deflated envelope with envelope ornamentation.
Fig. 8 in Phosphate replicated and replaced microstructure of molluscan shells from the earliest Cambrian of China
Fig. 8. Ilsanella? rozanovi Wang,1994. Specimen NIGP Mo 131358 from sample yd96924−8,upper phosphatic bed of the Zhongyicun Member,Baizai of Xundian in the eastern Yunnan,Meishucunian. A. Lateral view. B. Apical view. C. Enlargement of place shown by arrow in B,note cross section of prism replicated by internal mould. D. Enlargement of place shown by arrow in C.
Fig. 6 in Phosphate replicated and replaced microstructure of molluscan shells from the earliest Cambrian of China
Fig. 6. Archaeospira ornata Yu,1979. A. Specimen NIGP Mo 131370 from sample yd96923−10,upper part of the Dahai Member,Dahai of Huize in the eastern Yunnan,Meishucunian. Apical view (A 1); lamello−fibrillae at the apex (A2). B. Specimen NIGP Mo131370A from sample yd9649−2,upper phosphatic bed of the Zhongyicun Member,Yulu of Huize in the eastern Yunnan,Meishucunian. Lamello−fibrillae of the shell wall. C. Specimen NIGP Mo 131365 from yd96923−10, upper part of the Dahai Member, Dahai of Huize in the eastern Yunnan, Meishucunian (note fibrous structure).
Fig. 5 in Phosphate replicated and replaced microstructure of molluscan shells from the earliest Cambrian of China
Fig. 5. Latouchella cf. korobkovi Vostokova,1962. Specimen NIGP Mo 131371 from yd96924−8A upper part of the Dahai Member,Dahai of Huize in the eastern Yunnan, Meishucunian. A. Lateral view. B, C. Enlargement of place shown by arrow in B, note lamello−fibrillar structure.
Fig. 3 in Phosphate replicated and replaced microstructure of molluscan shells from the earliest Cambrian of China
Fig. 3. Watsonella yunnanensis (He and Yang,1982). Specimen NIGP Mo 131363 from sample yy9649−1,upper phosphatic bed of the Zhongyicun Member, Yulu of Huize in the eastern Yunnan, Meishucunian. A. Lateral view. B, C. Lamello−fibrillar structure. D. Enlargement of C.
Fig. 4. Ramenta cambrina Jiang,1982 in Phosphate replicated and replaced microstructure of molluscan shells from the earliest Cambrian of China
Fig. 4. Ramenta cambrina Jiang,1982. Specimen NIGP Mo 131200 from sample yy9649−1,upper phosphatic bed of the Zhongyicun Member,Beideng of Anning in the eastern Yunnan,Meishucunian. A. Lateral view. B. Apical view. C. Enlargement of place shown by arrow a in B,note irregular polygonal convexity. D. Enlargement of C, note lamello−fibrillar structure.
Fig. 2 in Phosphate replicated and replaced microstructure of molluscan shells from the earliest Cambrian of China
Fig. 2. Ilsanella cf. orectes (Jiang,1982). Specimen NIGP Mo 131353 from sample yb96929−1,upper phosphatic bed of the Zhongyicun Member,Baizai Xundian in the eastern Yunnan,Meishucunian. A. Lateral view. B. Lamello−fibrillae (arrow a) approximately perpendicular to growth lines (arrow b). C. Microstructure of inner surface of external coating. D. Enlargement of place shown by arrow in C, note lamello−fibrillae.
Fig. 7 in Phosphate replicated and replaced microstructure of molluscan shells from the earliest Cambrian of China
Fig. 7. Papilloconus explanatus Feng et al.,2000. Specimen NIGP Mo 131364 from sample yd96924,upper phosphatic bed of the Zhongyicun Member, Baizai of Xundian in the eastern Yunnan,Meishucunian. A. Lateral view. B. Apical view. C. Enlargement of place shown by arrow in B,note regular ar − rangement of nodules, corresponding to the end of prisms.
Figure 2 in Expression analysis of phosphate induced genes in contrasting maize genotypes for phosphorus use efficiency
Figure 2. Phylogenetic analysis based on nucleotide sequences of plant phosphate transporters. Plant phosphate transporters were assembled using ClustalX, and NJ-plot was used to develop the tree. Abbreviations are shown for respective transporters: ZmPTs: Zea mays phosphate transporters;AtPT: Arabidopsis thaliana phosphate transporters;LePT: Lycopersicon esculentum phosphate transporters; OsPT: Oryza sativa phosphate transporters; HvPT: Hordeum vulgare phosphate transporters; SbPT: Sorghum bicolor phosphate transporters.
Figure 1. A – P in Expression analysis of phosphate induced genes in contrasting maize genotypes for phosphorus use efficiency
Figure 1. A – P-efficient and P-inefficient maize plants grown in the Cerrado under low Pi conditions.B – Dry weight of maize genotypes. C – Root/shoot ratio of maize plants. D and E – Phosphorus content. F – Anthocyanin concentration. G and H – Units of APA activity. B to H, The maize plants were grown in hydroponics culture in the presence (250 µM Pi - gray bar) or absence (0 µM Pi – black bar) of phosphate harvested after 15 days in treatment. Each bar is the mean of three replicates with a standard deviation.
Figure 3. A in Expression analysis of phosphate induced genes in contrasting maize genotypes for phosphorus use efficiency
Figure 3. A – Northern blot analysis of phosphate starvation-induced ZmPTs genes in maize genotypes. B – Expression of ZmPTs in a plant grown in different phosphorus concentrations. C – Suppression of the ZmPTs expression by Pi resupply. D – Expression of ZmPT genes using RNA isolated from different root parts. E – Expression of ZmPTs in different maize plants under Pi starvation. F – Effect of duration of phosphate starvation on ZmPTs genes expression in maize genotypes. G – Expression of ZmPT homologs in roots of two sorghum genotypes. Total RNA isolated from different times of hydroponically grown plants supplied with half-strength modified Hoagland's solution containing 250 µM phosphate (+) or no phosphate (-) for different days or different concentrations as indicated. All the blots were probed with 32P labeled ZmPTs. The panel below the Northern blots is the ethidium bromide-stained gel prior to blotting showing the RNA integrity and uniformity of loading.
Data for: Triose phosphate utilization stress during photosynthesis addressed with dynamic assimilation measurements
<p>Oscillations in CO2 assimilation rate and associated fluorescence parameters have been observed alongside the triose phosphate utilization (TPU) limitation of photosynthesis for nearly 50 years. However, the mechanics of these oscillations are poorly understood. Here we utilize the recently developed Dynamic Assimilation Techniques (DAT) for measuring the rate of CO2 assimilation to increase our understanding of what physiological condition is required to cause oscillations. We found that TPU limiting conditions alone were insufficient, and that plants must enter TPU limitation quickly to cause oscillations. We found that ramps of CO2 caused oscillations proportional in strength to the speed of the ramp, and that ramps induce oscillations with worse outcomes than oscillations induced by step change of CO2 concentration. An initial overshoot is caused due to a temporary excess of available phosphate. During the overshoot, the plant out-performs steady state TPU and ribulose 1,5-bisphosphate regeneration limitations of photosynthesis but cannot exceed the rubisco limitation. We performed additional optical measurements which support the role of photosystem I reduction and oscillations in availability of NADP+ and ATP in supporting oscillations.</p>
Therapeutic activation of endothelial sphingosine 1-phosphate receptor-1 by chaperone-bound S1P suppresses proliferative retinal neovascularization
<p>Sphingosine-1-phosphate (S1P), the circulating HDL-bound lipid mediator that acts via S1P receptors (S1PR), is required for normal vascular development. The role of this signaling axis in vascular retinopathies is unclear. Here we show in a mouse model of oxygen-induced retinopathy (OIR) that endothelial overexpression of <em>S1pr1</em> suppresses while endothelial knockout of <em>S1pr1</em> worsens neovascular tuft formation. Furthermore, neovascular tufts are increased in <em>Apom<sup>-/-</sup> </em>mice which lack HDL-bound S1P while they are suppressed in <em>Apom<sup>TG</sup> </em>mice which has more circulating HDL-S1P. These results suggest that circulating HDL-S1P activation of endothelial S1PR1 suppresses neovascular pathology in OIR. Additionally, systemic administration of ApoM-Fc-bound S1P or a small molecule Gi-biased S1PR1 agonist suppressed neovascular tuft formation. Circulating HDL-S1P activation of endothelial S1PR1 may be a key protective mechanism to guard against neovascular retinopathies that occur not only in premature infants but also in diabetes and aging.</p>
LILBID spectra and geochemical data shown in article "Detection of Phosphates Originating from Enceladus' Ocean" by Frank Postberg et al. (2023)
<p>Laser Induced Liquid Beam Ion Desorption (LILBID) mass spectra of phosphates and data of geochemical experiments, shown in article "Detection of Phosphates Originating from Enceladus’ Ocean" by Frank Postberg et al. (2023), published in Nature.</p>
Dataset for A MILP approach for detailed operational scheduling of a supply chain in the phosphate industry
<p>10 instances to evaluate a MILP approach for detailed operational scheduling of a supply chain in the phosphate industry.</p>
The Role of Buffer, Pyridoxal 5'-Phosphate and Light on the Stability of the Silicibacter Pomeroyi Transaminase
<p>Transaminases are pyridoxal 5’-phosphate (PLP)-dependent enzymes that transfer amino-functions. The transaminase from <em>Silicibacter pomeroyi</em> (SpATA) exhibits a broad substrate spectrum. In this work we examined the effect of different conditions (light, buffer and PLP-concentration) on the stability of SpATA, as well as the causes for these effects. The enzyme was stored either in TRIS or CHES with 0–10 mM added PLP at 22 °C. The samples were either kept dark or they were exposed to light. The results show that invariably, all samples kept in darkness exhibited longer half-life times than the ones exposed to light. An increase in the half-life from 8 h to 720 h could be achieved solely by keeping the sample dark. Especially samples in CHES buffer inactivated faster in light the more PLP was present, due to the degradation of PLP. In TRIS however, an imine-bond between TRIS and PLP protects PLP from degradation.</p>
Supporting information for prebiotic triose glycolysis promoted by co-catalytic proline and phosphate in neutral water
<p>Supporting information for prebiotic triose glycolysis promoted by co-catalytic proline and phosphate in neutral water</p>
Data for: Triose phosphate utilization stress during photosynthesis addressed with dynamic assimilation measurements
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Data for: Observed declines in upper ocean phosphate-to-nitrate availability
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