scholarly journals Role of aerosols in deciding pH of rainwater

MAUSAM ◽  
2021 ◽  
Vol 58 (4) ◽  
pp. 513-524
Author(s):  
R. R. SHENDE ◽  
USHA RAVINDRAN ◽  
S. D. BHONDAVE ◽  
A. R. KONDE DESHMUKH
Keyword(s):  
Analysis Data ◽  
Precipitation Chemistry ◽  
Water Soluble ◽  
Sample Analysis ◽  
Chemistry Data ◽  
Ph Values ◽  
Rain Sample ◽  
Ph Scale ◽  
Alkaline Range

Nature of precipitation – alkaline or acidic – depends upon the concentration of major water soluble inorganic gaseous and soil derived particulates dissolved in it. If concentration of cations is higher than that of anions, the precipitation becomes alkaline and vise-a-versa. pH is the main parameter indicating the nature of precipitation. If pH of the solution is < 5.65, it is acidic and               > 5.65, alkaline, in the pH scale ranging between 0  & 14. Difference in the chemical composition of rainwater having pH in the alkaline range and acidic range has been studied in this paper. For this purpose, precipitation chemistry data of Allahabad, Jodhpur, Mohanbari and Nagpur for the period 1988-97 have been considered. APWM & S.D. have been worked out. Precipitation chemistry data considering APWM values in acidic range and in alkaline range have been separated and compared. Coefficients of correlation have been calculated in possible cation-anion combinations. It is seen that the lowest pH values (monthly mean) have been recorded during 1997 – MHB (3.77), NGP (4.12), both in acidic range. % Frequency of occurrences of pH values in acidic range was the highest at Mohanbari (66%) in the study period. Jodhpur recorded all pH values in alkaline range indicating influence of soil derived alkaline particulates. Among cations Ca+² has shown its dominance over all cations. Jodhpur has recorded the highest APWM value of Ca+² (9.27mg/lit) in 1997. Data have also been compared with WMO Laboratory simulated acid rain sample analysis data and other non-departmental data. Results are discussed in the paper.

scholarly journals Anthocyanin Color Stabilization by Host-Guest Complexation with p-Sulfonatocalix[n]arenes

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5389
Author(s):  
Johan Mendoza ◽  
Luis Cruz ◽  
Victor de Freitas ◽  
Fernando Pina ◽  
Nuno Basílio
Keyword(s):  
Binding Pocket ◽  
Association Constants ◽  
Water Soluble ◽  
Colored Form ◽  
Cationic Form ◽  
Substitution Pattern ◽  
Ph Values ◽  
Ph Scale ◽  
The Stability ◽  
Neutral Conditions

Flavylium-based compounds in their acidic and cationic form bring color to aqueous solutions, while under slightly acidic or neutral conditions they commonly bring discoloration. Selective host-guest complexation between water-soluble p-sulfonatocalix[n]arenes (SCn) macrocycles and the flavylium cationic species can increase the stability of the colored form, expanding its domain over the pH scale. The association constants between SCn and the cationic (acid) and neutral basic forms of flavylium-based compounds were determined through UV-Vis host-guest titrations at different pH values. The affinity of the hosts for synthetic chromophore was found to be higher than for a natural anthocyanin (Oenin). The higher affinity of SC4 for the synthetic flavylium was confirmed by 1H NMR showing a preferential interaction of the flavylium phenyl ring with the host cavity. In contrast with its synthetic counterpart, the flavylium substitution pattern in the anthocyanin seems to limit the inclusion of the guest in the host’s binding pocket. In this case, the higher affinity was observed for the octamer (SC8) likely due to its larger cavity and higher number of negatively charged sulfonate groups.

scholarly journals Trends of pH and aerosols in the precipitation at Srinagar, Mohanbari, Allahabad, Jodhpur, Nagpur and Minicoy during the period 1981-2001

MAUSAM ◽  
2021 ◽  
Vol 62 (2) ◽  
pp. 235-238
Author(s):  
M.S. TOMAR
Keyword(s):  
Main Parameter ◽  
Chemical Precipitation ◽  
Ionic Concentration ◽  
Water Soluble ◽  
Ph Values ◽  
Ph Scale

Nature of Precipitation - alkaline or acidic depends upon the concentration of major water soluble inorganic gaseous and soil derived particulates dissolved in it. If the concentration of cations is higher than that of anions the precipitations becomes alkaline and vice versa. pH is the main parameter indicating the nature of precipitation. If pH of rainwater <5.65 it is acidic and >5.65, it is alkaline ,both in the pH scale ranging between 0 and 14. In this paper average ionic concentration (mg/lit) and their trends have been analyzed. Srinagar, Mohanbari, Jodhpur, Allahabad, Nagpur and Minicoy have been selected for the study of chemical precipitation during the period 1981-2001. Trends of different aerosols have been analyzed at the intervals 1981-87, 1988-94 and 1995-2001. It has been observed that percentage of anions has increased which results in the increase of acidic character of the precipitation. During the interval 1995-2001, Nagpur and Mohanbari had pH values 5.16 and 5.47 respectively which were in acidic range.

THE ROLE OF NEUROPHYSIN IN THE TRANSPORT ANDRELEASE OF NEUROHYPOPHYSIAL HORMONES

1966 ◽  
Vol 35 (3) ◽  
pp. 289-NP ◽  
Author(s):  
M. GINSBURG ◽  
M. IRELAND
Keyword(s):  
Soluble Protein ◽  
Water Soluble ◽  
Subcellular Fractions ◽  
Neurosecretory Granules ◽  
Differential Centrifugation ◽  
Particle Fraction ◽  
Neurohypophysial Hormones ◽  
Ph Values ◽  
Water Soluble Protein

SUMMARY The distribution of neurophysin in subcellular fractions obtained by differential centrifugation of bovine neurohypophyses is essentially similar to the distribution of the hormones. The neurosecretory particle fraction contained more neurophysin than other fractions and neurophysin comprised half of its water soluble protein. Estimates were derived for the concentrations of oxytocin, vasopressin and neurophysin in neurosecretory granules. In experiments in which neurosecretory granules were suspended in media at pH values between 6·2 and 8·0 it was found that release of hormones increased with increasing pH. The role of neurophysin in the transport and release of neurohypophysial hormones is discussed.

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.

Polish Ethnic Minority in Belarus and Lithuania: Politics, Institutions, and Identities

2020 ◽  
pp. 1-18
Author(s):  
Monika Frėjutė-Rakauskienė ◽  
Olga Sasunkevich ◽  
Kristina Šliavaitė
Keyword(s):  
Identity Formation ◽  
Research Question ◽  
Analysis Data ◽  
Minority Communities ◽  
Secondary Sources ◽  
Institutional Settings ◽  
Cross Case Analysis ◽  
Two Sides ◽  
State Schools

Abstract This article analyzes how institutions influence the process of identity formation within the Polish minority communities in Belarus and Lithuania. We focus on ways that the identities of people who consider themselves Poles in Belarus and Lithuania are targeted by institutions like the state, schools, and nongovernmental organizations. We aim to shed light on how these processes are shaped by institutional settings and broader political contexts. The authors take a bottom-up approach to institutions and look at how members of the Polish communities in the two neighboring countries conceptualize the role of various institutions—NGOs, schools, Karta Polaka (the Polish Card)—to shape their sense of ethnic belonging. The article is built on a cross-case analysis. Data for the Lithuanian and Belarusian cases, consisting of interviews and secondary sources, were collected independently and then reread in light of a common research question. Through our analysis, we show differences and similarities in how analogous institutions function on the two sides of the border and elaborate on the reasons why these differences occur and what role state policy and supranational regulations play in the process.

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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