INFLUENCE OF PRECURSORS ON THE CONTENT OF MINERAL PHOSPHORUS FRACTIONS IN THE SOILS OF RICE FIELDS IN THE ROSTOV REGION.

2020 ◽  
Author(s):  
L.A. Kuleshova ◽  
◽  
A.S Kasakova ◽  
I.S Tatyanchenko
Keyword(s):  
Calcium Phosphates ◽  
Growing Season ◽  
Rice Fields ◽  
Water Soluble ◽  
Iron Phosphates ◽  
Mineral Phosphorus ◽  
Chestnut Soils ◽  
Rostov Region ◽  
Soluble Fractions

The article is devoted to the problem of phosphoric nutrition of rice on chestnut soils of the northernmost zone of rice cultivation in Russia. The paper reveals the role of water-soluble fractions of phosphorus, aluminosilicates, iron phosphates and calcium phosphates in the nutrition of rice plants during the growing season. The influence of the previous culture on the content and consumption of these fractions was established.

scholarly journals The uptake and metabolism of plasma lysophosphatidylcholine in vivo by the brain of squirrel monkeys

1972 ◽  
Vol 130 (2) ◽  
pp. 557-567 ◽  
Author(s):  
D. R. Illingworth ◽  
O. W. Portman
Keyword(s):  
Fatty Acid ◽  
Squirrel Monkeys ◽  
Water Soluble ◽  
Free Choline ◽  
Direct Acylation ◽  
The Brain ◽  
Uptake And Metabolism ◽  
Soluble Fractions

1. Adult squirrel monkeys were injected intravenously with doubly labelled lysophosphatidylcholine (a mixture of 1-[1-14C]palmitoyl-sn-glycero-3-phosphorylcholine and 1-acyl-sn-glycero-3-phosphoryl[Me-3H]choline; 3H:14Cratio 3.75) complexed to albumin, and the incorporation into the brain was studied at times up to 3h. 2. After 20min, 1% of the radioactivity injected as lysophosphatidylcholine had been taken up by the brain. 3. Approx. 70% of the doubly labelled lysophosphatidylcholine taken up by both grey and white matter was converted into phosphatidylcholine, whereas about 30% was hydrolysed. 4. The absence of significant radioactivity in the phosphatidylcholine, free fatty acid and water-soluble fractions of plasma up to 30min after injection of doubly labelled lysophosphatidylcholine rules out the possibility that the rapid labelling of these compounds in brain could be due to uptake from or exchange with their counterparts in plasma. 5. The similarity between the 3H:14C ratios of brain phosphatidylcholine and injected lysophosphatidylcholine demonstrates that formation of the former occurred predominantly via direct acylation. 6. Analysis of the water-soluble products from lysophosphatidylcholine catabolism revealed that appreciable glycerophosphoryl-[Me-3H]choline did not accumulate in the brain and that radioactivity was incorporated into choline, acetylcholine, phosphorylcholine and βine. 7. The role of plasma lysophosphatidylcholine as both a precursor of brain phosphatidylcholine and a source of free choline for the brain is discussed.

“DON VALLEY” WINE-MAKING CLUSTER AS AN ENOGASTROTOURISM DEVELOPMENT SITE: SOCIO-CULTURAL COMPONENT

2020 ◽  
Author(s):  
Е.V. Pokazannik ◽  
Keyword(s):  
Project Management ◽  
Geographic Location ◽  
Tourist Destination ◽  
Wine Making ◽  
Rostov Region ◽  
Regional Cluster ◽  
Educational Programmes ◽  
Development Site ◽  
Cultural Component

“Don Valley” is more than a historic or geographic location, - it is an official name of a wine-making area, proposed by Rostov Region administration for consolidation of local wine-makers under the single mega-brand. Specialized regional cluster “Don Valley” is “an association of leading scientific, educational, industrial, engineering and innovative organizations and enterprises of the Rostov region, operating in the following areas: wine-making, manufacturing of components for wineries, scientific-research and educational programmes, development of retail infrastructure, promotion of wine-tasting and gastronomic tourism, and viniculture”3. The creators of the cluster official web-site declare “Made on the Don” brand communication as their primary goal, along with promotion of wine in the region. The article reviews the specifics of Don region from a standpoint of its attractiveness as a tourist destination. The mandatory components are named that together with the enogastronomic sphere can contribute to the growth of demand for tourist routes of various content and duration. The key role of cultural and historic component in successful promotion of the Don winemaking in the tourism market is emphasized. It is noted that enogastrotourism can be developed successfully in Don region through socio-cultural project management based on the thorough analysis of specifics of the region as a whole and its individual components affecting the marketing and advertising solutions.

scholarly journals Did Cyclic Metaphosphates Have a Role in the Origin of Life?

2021 ◽  
Author(s):  
Thomas Glonek
Keyword(s):  
Organic Molecules ◽  
Water Soluble ◽  
Holliday Junction ◽  
Additional Energy ◽  
Condensed Phosphate ◽  
Geological Processes ◽  
The Origin Of Life ◽  
Complex Forms ◽  
Self Replication

AbstractHow life began still eludes science life, the initial progenote in the context presented herein, being a chemical aggregate of primordial inorganic and organic molecules capable of self-replication and evolution into ever increasingly complex forms and functions.Presented is a hypothesis that a mineral scaffold generated by geological processes and containing polymerized phosphate units was present in primordial seas that provided the initiating factor responsible for the sequestration and organization of primordial life’s constituents. Unlike previous hypotheses proposing phosphates as the essential initiating factor, the key phosphate described here is not a polynucleotide or just any condensed phosphate but a large (in the range of at least 1 kilo-phosphate subunits), water soluble, cyclic metaphosphate, which is a closed loop chain of polymerized inorganic phosphate residues containing only phosphate middle groups. The chain forms an intrinsic 4-phosphate helix analogous to its structure in Na Kurrol’s salt, and as with DNA, very large metaphosphates may fold into hairpin structures. Using a Holliday-junction-like scrambling mechanism, also analogous to DNA, rings may be manipulated (increased, decreased, exchanged) easily with little to no need for additional energy, the reaction being essentially an isomerization.A literature review is presented describing findings that support the above hypothesis. Reviewed is condensed phosphate inorganic chemistry including its geological origins, biological occurrence, enzymes and their genetics through eukaryotes, polyphosphate functions, circular polynucleotides and the role of the Holliday junction, previous biogenesis hypotheses, and an Eoarchean Era timeline.

Kaolin impacts on hormonal balance, polyphenolic composition and oenological parameters in red grapevine berries during ripening

2021 ◽  
pp. 1-15
Author(s):  
Sara Bernardo ◽  
Lia-Tânia Dinis ◽  
Nelson Machado ◽  
Ana Barros ◽  
Marta Pitarch-Bielsa ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Growing Season ◽  
Growing Seasons ◽  
Polyphenolic Composition ◽  
Berry Ripening ◽  
Hormonal Balance ◽  
Summer Stress ◽  
Fruit Damage ◽  
Stress Signals

BACKGROUND: Kaolin particle-film application is a well-known strategy to avoid fruit damage. However, its putative role in balancing berry ripening under a changing climate remains poorly explored. OBJECTIVE: We assessed kaolin treatment effect on several ripening berry components, hormonal balance and oenological parameters of the field-grown Touriga-Franca (TF) and Touriga–Nacional (TN) grapevine varieties at veraison (EL35) and ripening (EL38) during two growing seasons (2017 and 2018). RESULTS: Under the adverse summer conditions (two heatwave events) of 2017, kaolin application increased 211.2 %and 51.4 %the salicylic acid (SA) and abscisic acid (ABA) levels in TF berries at EL38, while no significant differences were observed in TN. Conversely, TF, and TN kaolin treated berries showed lower SA and ABA accumulation in 2018, respectively. Tartaric acid content increased about 17.2 %, and 24.2 %in TF and TN treated berries at stage EL35 in the 2017 growing season. Though kaolin treatment had no consistent effect on anthocyanins accumulation, flavonoids, ortho-diphenols and tannins increased in kaolin treated grapevines in 2017. CONCLUSIONS: This study highlights the key role of climate in triggering ripening related processes and fruit quality potential. Nevertheless, kaolin treated grapevines displayed an improved response to oxidative stress signals by increasing secondary metabolites accumulation in warm vintages. Kaolin application promoted different varietal responses, with a possible ripening delaying effect in TF, reinforcing its efficiency in alleviating severe summer stress impacts.

The biological activity of glucagon–phospholipid complexes

1983 ◽  
Vol 61 (7) ◽  
pp. 688-691 ◽  
Author(s):  
J. J. Liepnieks ◽  
P. Stoskopf ◽  
E. A. Carrey ◽  
C. Prosser ◽  
R. M. Epand
Keyword(s):  
Biological Activity ◽  
Adenylate Cyclase ◽  
Plasma Membranes ◽  
Bovine Brain ◽  
Water Soluble ◽  
Dipalmitoyl Phosphatidylcholine ◽  
Dimyristoyl Phosphatidylcholine ◽  
Lipoprotein Complex ◽  
Stimulation Of

Glucagon can form water-soluble complexes with phospholipids. The incorporation of glucagon into these lipoprotein particles reduces the biological activity of the hormone. The effect is observed only at temperatures below the phase transition temperature of the phospholipid and results in a decreased stimulation of the adenylate cyclase of rat liver plasma membranes by the lipoprotein complex as compared with the hormone in free solution. Two- to five-fold higher concentrations of glucagon are required for half-maximal stimulation of adenylate cyclase when the hormone is complexed with dimyristoyl phosphatidylcholine, dipalmitoyl phosphatidylcholine, or bovine brain sphingomyelin. A possible role of lipoprotein-associated hormones in the development of insulin resistance is discussed.

scholarly journals An Essential Role of the CAAT/Enhancer Binding Protein-α in the Vitamin D-Induced Expression of the Human Steroid/Bile Acid-Sulfotransferase (SULT2A1)

2006 ◽  
Vol 20 (4) ◽  
pp. 795-808 ◽  
Author(s):  
Chung S. Song ◽  
Ibtissam Echchgadda ◽  
Young-Kyo Seo ◽  
Taesung Oh ◽  
Soyoung Kim ◽  
...  
Keyword(s):  
Vitamin D ◽  
Binding Site ◽  
Essential Role ◽  
Binding Protein ◽  
Water Soluble ◽  
Induced Expression ◽  
Composite Element ◽  
Deoxyribonuclease I ◽  
Enhancer Binding Protein

Abstract The vitamin D receptor (VDR) regulates steroid and drug metabolism by inducing the genes encoding phase I and phase II enzymes. SULT2A1 is a liver- and intestine-expressed sulfo-conjugating enzyme that converts the alcohol-OH of neutral steroids, bile acids, and drugs to water-soluble sulfated metabolites. 1α,25-Dihydroxyvitamin D3 [1,25-(OH)2D3] induces SULT2A1 gene transcription after the recruitment of VDR to the vitamin D-responsive chromatin region of SULT2A1. A composite element in human SULT2A1 directs the 1,25-(OH)2D3-mediated induction of natural and heterologous promoters. This element combines a VDR/retinoid X receptor-α-binding site [vitamin D response element (VDRE)], which is an imperfect inverted repeat 2 of AGCTCA, and a CAAT/enhancer binding protein (C/EBP)-binding site located 9 bp downstream to VDRE. The binding sites were identified by EMSA, antibody supershift, and deoxyribonuclease I footprinting. C/EBP-α at the composite element plays an essential role in the VDR regulation of SULT2A1, because 1) induction was lost for promoters with inactivating mutations at the VDRE or C/EBP element; 2) SULT2A1 induction by 1,25-(OH)2D3 in C/EBP-α-deficient cells required the expression of cotransfected C/EBP-α; and 3) C/EBP-β did not substitute for C/EBP-α in this regulation. VDR and C/EBP-α were recruited concurrently to the composite element along with the coactivators p300, steroid receptor coactivator 1 (SRC-1), and SRC-2, but not SRC-3. VDR and C/EBP-α associated endogenously as a DNA-dependent, coimmunoprecipitable complex, which was detected at a markedly higher level in 1,25-(OH)2D3-treated cells. These results provide the first example of the essential role of the interaction in cis between C/EBP-α and VDR in directing 1,25-(OH)2D3-induced expression of a VDR target gene.

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