Source of N-nitrosodimethylamine in river waters of the upper Tone River basin in Japan

2010 ◽  
Vol 62 (11) ◽  
pp. 2550-2557 ◽  
Author(s):  
K. Kosaka ◽  
K. Fukui ◽  
M. Asami ◽  
M. Akiba
Keyword(s):  
River Basin ◽  
The Other ◽  
Processing Plant ◽  
Sewage Effluent ◽  
River Waters ◽  
Industrial Discharge ◽  
Other Hand ◽  
High Concentrations ◽  
Kanto Region

The presence of N-nitrosodimethylamine (NDMA) in the Hirose River and its tributaries, located in the upper Tone River basin, in the Kanto region of Japan, was investigated. NDMA was detected at high levels in the Arato River, one of the tributaries of the Hirose River, at high concentrations (up to 2,100 ng/L). Due to the confluence of the Arato River, NDMA concentration in the Hirose River increased (up to 61 ng/L). The NDMA in the Arato River was due to industrial discharge from a livestock processing plant located near the river. There were three discharges at the plant, with NDMA concentrations of 78, 11, and 33,000 ng/L. The industrial discharges from the livestock processing plant did not contain significant amounts of NDMA precursors on chloramination. On the other hand, sewage effluent was shown to contain NDMA precursors. The amounts of NDMA precursors in the sewage effluent that were rapidly transformed into NDMA were considered to be lower than those slowly transformed into NDMA.

Nutritional Requirement for 4-Aminobenzoate Caused by Mutation of Dihydropteroate Synthetase

1976 ◽  
Vol 31 (5-6) ◽  
pp. 285-287 ◽  
Author(s):  
Helmut Rappold ◽  
Adelbert Bacher
Keyword(s):  
Parent Strain ◽  
The Other ◽  
Synthetase Activity ◽  
Nutritional Requirement ◽  
Wild Type ◽  
Aerobacter Aerogenes ◽  
Low Level ◽  
Other Hand ◽  
High Concentrations

Abstract Aerobacter aerogenes mutant 62-1 AC requires high concentrations of 4-aminobenzoate for growth. The mutant accumulates N-glucosyl-4-aminobenzoate and has an intact 4-aminobenzoate synthetase (Bacher, Gilch, Rappold, and Lingens, Z. Naturforsch. 28c, 614 - 617 [1973]). On the other hand the ability of the mutant to synthesize dihydropteroate is markedly reduced. The dihydropteroate synthetase level of mutant 62-1 AC is 1% as compared to the parent strain. Spontaneous revertants of mutant 62-1 AC show wild type levels of dihydropteroate synthetase. We conclude that the requirement for 4-aminobenzoate in mutant 62-1 AC is due to poor utilization of 4-aminobenzoate as a consequence of the low level of dihydropteroate synthetase activity.

Specific Inhibition of Platelet Agglutination and Aggregation by Aromatic Amidino Compounds

1978 ◽  
Vol 39 (02) ◽  
pp. 411-425 ◽  
Author(s):  
J D Geratz ◽  
R R Tidwell ◽  
K M Brinkhous ◽  
S F Mohammad ◽  
O Dann ◽  
...  
Keyword(s):  
Platelet Aggregation ◽  
Human Plasma ◽  
Inhibitory Effect ◽  
The Other ◽  
Specific Inhibition ◽  
Test Systems ◽  
Other Hand ◽  
Bovine Plasma ◽  
Inhibitory Activities ◽  
High Concentrations

SummaryA series of aromatic amidino compounds were investigated for their inhibitory effect on platelet agglutination and platelet aggregation. Agglutination of fresh or fixed platelets was produced by bovine plasma or by human plasma in combination with ristocetin, while aggregation of fresh platelets was induced by ADP, thrombin or collagen. Highly effective inhibitors were found for both types of platelet clumping, but there was no parallelism between the inhibitory activities in the two test systems. 5-(5-amidino-2-benzimidazolyl)-2-(4-hydroxyben-zene)benzimidazole suppressed agglutination exclusively. Pentamidine, on the other hand, strongly blocked the aggregation reactions, but did not interfere with agglutination, even at high concentrations. Compounds which inhibited aggregation also prevented the liberation of serotonin from the platelets.

Exploring the migration of Muslims, Hindus and Sikhs in Birmingham by ward concentration and deprivation

2021 ◽  
Vol 18 (3) ◽  
pp. 339-348
Author(s):  
Serena Hussain
Keyword(s):  
The Other ◽  
Economic Disadvantage ◽  
Other Hand ◽  
High Concentrations ◽  
The Relationship ◽  
Group Concentration

This paper explores the migration within as well as migration to Birmingham of Muslims, Hindus and Sikhs. It provides analysis and reflection on the relationship between migration, faith group concentration and deprivation. The findings demonstrate how Muslim, Hindu and Sikh migration trends differ for specific wards characterised by contrasting levels of both socio-economic disadvantage and faith group clustering. Hindus are shown to migrate to more affluent areas, however this does not necessarily translate to moving away from wards where there are clusters of the same faith group, as discussion on Hall Green illustrates. Muslims, on the other hand, displayed a greater propensity to move away from wards with high concentrations of the same faith group, yet this did not also result in moving to more affluent wards.

scholarly journals The species of Hemiancistrus (Siluriformes: Loricariidae) from Ecuador

Zootaxa ◽  
2017 ◽  
Vol 4272 (2) ◽  
pp. 221 ◽  
Author(s):  
FRANCISCO PROVENZANO R. ◽  
RAMIRO BARRIGA S.
Keyword(s):  
New Species ◽  
Comparative Analysis ◽  
River Basin ◽  
Color Pattern ◽  
The Other ◽  
Future Analysis ◽  
Other Hand ◽  
Fish Collection ◽  
Pacific Slope ◽  
Different Color

At the Fish Collection of the Instituto de Ciencias Biológicas, Escuela Politécnica Nacional, Quito, three species traditionally grouped in the genus Hemiancistrus were identified: H. annectens (Regan 1904), H. landoni Eigenmann 1916, and a new specie described here. The new species inhabits exclusively in the Esmeraldas River Basin, Pacific slope, northwestern Ecuador. It is easily recognized by the completely naked abdomen, with rounded, dark spots, and a different color pattern on the dorsal and caudal fins. A comparative analysis of bones related to the opercular mobility, shows important differences between H. annectens, H. landoni, and the new species, suggesting that H. annectens does not belong to the genus Hemiancistrus or the Ancistrini group. According to the characteristics observed in these bones, H. annectens shows greater similarity to those reported in species of the Hypostomini group, supporting its inclusion in this group, but placing it in the genus Hypostomus requires further analysis. On the other hand, the conditions observed on the bones of Hemiancistrus landoni and the new species suggest that both are inside of the Ancistrini group. The new species is placed in the genus Hemiancistrus tentatively, pending future analysis.

Adaptation of the PolychaeteNereis Diversicolorto Estuarine Sediments Containing High Concentrations of Zinc and Cadmium

1973 ◽  
Vol 53 (4) ◽  
pp. 839-857 ◽  
Author(s):  
G. W. Bryan ◽  
L. G. Hummerstone
Keyword(s):  
The Other ◽  
Estuarine Sediments ◽  
Nereis Diversicolor ◽  
Other Hand ◽  
High Concentrations

In the first paper of this series (Bryan & Hummerstone, 1971) it was shown that in the estuarine polychaeteNereis diversicolorO. F. Müller the concentration of copper is roughly proportional to that of the surrounding sediment. On the other hand, concentrations of zinc appeared to be relatively independent of those in the sediment and it was suggested that the level of zinc in the worm is regulated.

scholarly journals The Urban Society of Kazan and the Sanitary and Environmental Problems during the Second Half of the 19th–Early 20th Centuries

2021 ◽  
Vol 163 (3) ◽  
pp. 213-225
Author(s):  
A.O. Kislenko ◽  
Keyword(s):  
Local Government ◽  
Well Being ◽  
Urban Society ◽  
Environmental Problems ◽  
The Other ◽  
Sewage Discharge ◽  
River Waters ◽  
Other Hand ◽  
The One ◽  
The City

The attitude of the Kazan community to the urban environmental and sanitary problems during the second half of the 19th–early 20th centuries was discussed. The measures taken by the local government were analyzed. Based on the administrative sources and periodicals of that time, an ambiguous reaction to the governmental measures was noticed among the residents of Kazan, as compared with a similar situation in St. Petersburg. In Kazan, the residents intermittently violated the compulsory resolutions adopted by the local government to improve the environmental and sanitary situation: they kept the latrines dirty, failed to timely clean the street areas, and discharged their household wastes in the river waters. It was revealed that the residents tended to neglect the sanitary rules because of both irresponsibility and the difficult socioeconomic situation, i.e., sewage cleaning was expensive and complicated. Interestingly, the steps undertaken by the local government are quite confusing and questionable: on the one hand, the authorities did their best to prevent littering, deforestation, and sewage discharge; on the other hand, they were eager to solve the burning sanitary problems at the expense of the ecological well-being of the city.

Distribution of recently absorbed zinc in subterranean clover (Trifolium subterraneum L.) determined by adding radioactive zinc to the culture soultion

1960 ◽  
Vol 11 (6) ◽  
pp. 887 ◽  
Author(s):  
DS Riceman ◽  
GB Jones
Keyword(s):  
Zinc Deficiency ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Main Axis ◽  
Leaf Primordia ◽  
The Other ◽  
Subsequent Growth ◽  
Other Hand ◽  
Radioactive Zinc ◽  
High Concentrations

The distribution of zinc recently absorbed as 65Zn into subterranean clover (T. subterraneum L. var. Bacchus Marsh) from culture solutions has been examined by means of radioautographs in normal plants and in plants recovering from a state of zinc deficiency. In normal plants which had been grown initially in cultures containing non-radioactive zinc, the recently absorbed zinc reached high concentrations in the roots, main axis, and youngest leaves but very little of it moved into the older, fully expanded leaves. In plants recovering from the deficiency, on the other hand, the recently absorbed zinc reached high concentrations in all the living organs, including the oldest leaves. Growth of the "little" leaves or other leaves affected by the deficiency was not resumed after the entry of zinc into their tissues. Recovery of the plant depended upon the production of new leaves by the leaf primordia and upon their subsequent growth and emergence.

Absorption de sodium, calcium et potassium lors d'interactions ioniques au cours de la phase de germination de Raphanus sativus

1982 ◽  
Vol 60 (9) ◽  
pp. 1639-1646 ◽  
Author(s):  
Gilles Guerrier
Keyword(s):  
Raphanus Sativus ◽  
External Solution ◽  
Sodium Content ◽  
The Other ◽  
Mineral Analysis ◽  
Sodium Calcium ◽  
Germination Medium ◽  
Other Hand ◽  
Raphanus Sativus L ◽  
High Concentrations

Na+–K+ and Na+–Ca2+ interactions are measured by mineral analysis of germinating plantlets of radish (Raphanus sativus L.) in nutritive solutions enriched in these three elements. With high concentrations of CaCl2, more than 2.5 mM, the absorption of sodium is stimulated especially when there is a high percentage of this element in the external solution. On the other hand, KCl brings about a decrease in the sodium content in the hypocotyl, cotyledons and root; no one organ is affected. Only the uptake of sodium is modified not its transport, which is always proportional to the quantity absorbed. The absorption of calcium and potassium does not evolve in proportion to their external amounts, and the inhibition of accumulation of these elements by sodium is not dependent on the concentration of NaCl. The uptake of calcium is more inhibited than that of potassium which varies with the quantities of KCl and NaCl in the germination medium. Thus, potassium inhibits the uptake of sodium more than sodium inhibits that of potassium. However, whereas the absorption of sodium is only slightly modified by calcium, the absorption of calcium depends highly on the concentration of sodium.

scholarly journals Precipitation trends in the Gambia River Basin (Senegal) for the period 1971-2010

2018 ◽  
Vol 98 (2) ◽  
pp. 45-57
Author(s):  
Cheikh Faye
Keyword(s):  
River Basin ◽  
Climate Changes ◽  
Statistical Approach ◽  
West African ◽  
The Other ◽  
Total Precipitation ◽  
Strong Decrease ◽  
Other Hand ◽  
Annual Total ◽  
Precipitation Trends

Since the 1970s, West African streams experienced profound modifications connected to pluviometric deficit, which have influenced on a strong decrease of water resources. The objective of this study is to analyze trends of precipitation at the six selected stations in the Senegalese part of Gambia River basin, using graphical and statistical approach. Methodology is consisted of an analysis of monthly, seasonal and annual variability of precipitation for the 1971-2010 period, through Non-parametric tests. Study revealed a strong variability and often a contrasting evolution between various stations (K?dougou, Simenti, Tambacounda, Kounghel, Nioro and Goudiry). Between the periods 1971-1990 and 1991-2010, the value U of Mann-Whitney, had changed from 60 to 40 at Tambacounda, 64 to 59 at K?dougou and 63 to 51 at Simenti station, which showed non-significant trends in annual total precipitation for the studied period. Sen?s estimator revealed significant descending trends on K?dougou station (9.812 mm/year for the period 1971-1990 and 0.309 mm/year for the period 1991-2010), and Simenti station too. On the other hand (in the whole article), on the stations of Tambacounda, Goudiry and Koungheul, the reduction is noticed for the period 1971-1990 (3.658 mm/year on Tambacounda), and an increase is noticed in the period 1991-2010 (13.21 mm/year on Tambacounda). For the station Nioro, on other hand, increase is noted in both periods (3.801 mm/year and 8.841 mm/year). The assumption is that these significant trends of precipitation during the last four decades could be attributed to the climate changes.

EFFECT OF AN OVULATORY DOSE OF LUTEINIZING HORMONE ON THE CONCENTRATION OF OESTRONE, OESTRADIOL AND PROGESTERONE IN THE RABBIT OVARIAN FOLLICLES

1976 ◽  
Vol 82 (4) ◽  
pp. 792-800 ◽  
Author(s):  
Vasant V. Patwardhan ◽  
André Lanthier
Keyword(s):  
Luteinizing Hormone ◽  
Follicular Fluid ◽  
Ovarian Follicles ◽  
Mature Female ◽  
The Other ◽  
Other Hand ◽  
High Concentrations ◽  
Sexually Mature

ABSTRACT This study was done to determine the effect of an ovulatory dose of LH on the concentration of oestrone, oestradiol and progesterone in the follicular tissue and in follicular fluid of ovaries of sexually mature female rabbits. Eight animals were sacrificed without treatment while others (4 to a group) were sacrificed at 1, 3, 4, 6, 8 and 10 h after administration of LH (50 μg). In each animal follicles from both ovaries were pooled and the follicular tissue was separated from the fluid. Determination of oestrone, oestradiol and progesterone was done by radioimmunoassay separately in the follicular tissue and in fluid. One hour after LH treatment oestrogen levels were found elevated, as compared to the control, in the fluid but not in the tissue. Thereafter oestrogen levels declined and reached levels much below control at times nearing ovulation. On the other hand, progesterone levels were elevated over the control in both the tissue and fluid at 1 and 3 h. The tissue progesterone levels were, however, below control at and after 6 h. The sustained high concentrations of tissue progesterone in the earlier period after LH stimulation could play a role in the chain of events leading to follicular rupture.

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