An Investigation of the Quantity, Quality and Sources of Groundwater Seepage into the St. Clair River near Sarnia, Ontario, Canada

1986 ◽  
Vol 21 (3) ◽  
pp. 351-367 ◽  
Author(s):  
Michael Sklash ◽  
Sharon Mason ◽  
Suzanne Scott ◽  
Chris Pugsley
Keyword(s):  
Electrical Conductivity ◽  
River Water ◽  
Organic Contaminants ◽  
Shallow Groundwater ◽  
Seepage Rate ◽  
Groundwater Seepage ◽  
Seepage Meters ◽  
Groundwater Samples ◽  
Hydraulic Gradients ◽  
Unidentified Source

Abstract We used seepage meters and minipiezometers to survey a 100 m by 7 km band of streambed of the St. Clair River near Sarnia, Ontario, Canada, to determine the quantity, quality, and sources of groundwater seepage into the river. The average observed seepage rate, 1.4 x 10−8 m3/s/m2, suggests higher than expected hydraulic conductivities and/or hydraulic gradients in the streambed. We found detectable levels of some organic contaminants in streambed groundwater samples from 1.0 and 1.5 m depths, however , concentrations did not exceed drinking water guidelines. Our isotopic and electrical conductivity data indicate that: (l) the streambed groundwater is not just river water, (2) groundwater from the “freshwater aquifer” at the base of the overburden Is not a significant component of the streambed groundwater, (3) some of the streambed groundwater is partially derived from a shallow groundwater flow system, and (4) an unidentified source of water with low tritium, river water-like δ18O, and very high electrical conductivity, contributes to the streambed groundwater.

scholarly journals Potassium control of extrarenal renin secretion in transgenic (mRen-2)27 and normal rats

1999 ◽  
Vol 277 (4) ◽  
pp. E631-E638
Author(s):  
Pei Rong ◽  
Jennifer L. Wilkinson-Berka ◽  
Sandford L. Skinner
Keyword(s):  
Plasma Potassium ◽  
High Plasma ◽  
Sprague Dawley ◽  
Spontaneously Hypertensive ◽  
Active Renin ◽  
Plasma Active Renin ◽  
Unidentified Source ◽  
Extrarenal Renin ◽  
Positive Correlations ◽  
Potassium Loading

Plasma active renin and prorenin were followed for 12 h after bilateral, unilateral, and sham nephrectomy (BNx, UNx, and SNx) in anesthetized transgenic (mRen-2)27 rats to compare them with Sprague-Dawley and spontaneously hypertensive rats (SDR and SHR). In Ren-2 rats, active renin and prorenin increased with plasma potassium post-BNx and were augmented by potassium infusion. The increase in prorenin but not active renin was abolished by bilateral adrenalectomy (BADRx). However, this did not reduce prorenin below normal, indicating that the high plasma prorenin Ren-2 phenotype is not only of adrenal origin. SNx and UNx also raised plasma active renin and prorenin in Ren-2 rats, with positive correlations to plasma potassium. In SDR and SHR, active renin fell below prorenin post-BNx, and adrenal ablation and potassium loading (in SDR) modified the decreasing active renin profile consistent with low levels of regulated extrarenal secretion. In Ren-2 rats, adrenal but not extra-adrenal prorenin secretion is potassium sensitive and stress related. The unidentified source of active renin in BNx+BADRx Ren-2 rats is also potassium and stress related.

scholarly journals THE FATE OF TWO LARGE OIL SPILLS IN THE ARABIAN GULF

1983 ◽  
Vol 1983 (1) ◽  
pp. 377-380 ◽  
Author(s):  
William J. Lehr ◽  
Murat S. Belen
Keyword(s):  
Crude Oil ◽  
Computer Model ◽  
Trajectory Analysis ◽  
Oil Spills ◽  
Arabian Gulf ◽  
Oil Field ◽  
Environmental Damage ◽  
Unidentified Source ◽  
Offshore Oil ◽  
Large Sections

ABSTRACT In August and October 1980, two large oil spills occurred in the Arabian Gulf. The first, from an unidentified source, involved about 20,000 barrels of crude oil and impacted the entire north and west coasts of the island nation of Bahrain. The second occurred when the Ron Tapmeyer platform in the Hasbah offshore oil field blew out, releasing an estimated 50,000 barrels of thick crude into the Gulf. The spill subsequently covered large sections of the coastline of Qatar. The fate of the oil from these spills is examined with respect to the unique conditions found in the region. A computer model is used for trajectory analysis of the spills and hypothesizing the possible origin of the first spill. Methods of cleanup and problems with the weathered oil are mentioned. The environmental damage caused by the Bahrain spill is assessed.

The Motivations of Anonymous Whistle-Blowers: The Case of Federal Employees

1988 ◽  
Vol 17 (3) ◽  
pp. 281-296 ◽  
Author(s):  
Marcia P. Miceli ◽  
Bonnie L. Roach ◽  
Janet P. Near
Keyword(s):  
Survey Data ◽  
Bystander Intervention ◽  
Federal Employees ◽  
Whistle Blowing ◽  
Decision Points ◽  
Trade Offs ◽  
Unidentified Source ◽  
Organizational Wrongdoing ◽  
Do So

The “Deep Throat” case during Watergate — in which a well-placed unidentified source called attention to governmental wrongdoing — exemplifies the complexities created by anonymous whistle-blowing. What anonymous whistle-blowers may lose in credibility they gain in protection from reprisal. The trade-offs facing the potential whistle-blower who decides to remain unidentified are examined empirically using survey data from 8500 federal employees. Propositions derived from a model of bystander intervention (Latané & Darley, 1970) are investigated, with consideration of three decision points: whether the observer of organizational wrongdoing should blow the whistle, whether the whistle-blower should act anonymously, and whether the whistle-blower should report the wrong-doing through internal channels or to someone outside the organization. The results suggest a compounding of the last two decisions: in fact, the choice of channels represents one of four distinct strategies. Whistle-blowers may be anonymous or identified with either external or internal channels, but the conditions under which they do so vary dramatically. The whistle-blower who, like “Deep Throat,” chooses to use an anonymous external channel faces a series of interrelated and complex decisions.

Sixth/Twelfth-Century Zaydī Theologians of Yemen Debating Avicennan Philosophy

2021 ◽  
Vol 5 (1-2) ◽  
pp. 217-269
Author(s):  
Hassan Ansari ◽  
Sabine Schmidtke
Keyword(s):  
Twelfth Century ◽  
Philosophical Work ◽  
Critical Editions ◽  
The World ◽  
Unidentified Source

Abstract This article offers critical editions of three texts by Zaydī theologians of sixth/twelfth-century Yemen refuting philosophical notions. The three texts are Qāḍī Jaʿfar b. Aḥmad b. ʿAbd al-Salām al-Buhlūlī’s (d. 573/1177-78) Kitāb al-Risāla al-munāṣifa li-l-mutakallimīn wa-l-falāsifa (Masʾalat al-nafs) and two tracts by al-Ḥasan al-Raṣṣāṣ (d. 584/1188), al-Masʾala al-kāshifa ʿan buṭlān shubhat al-falāsifa, a refutation of the philosophers’ doctrine of the eternity of the world, and Masʾala fī ibṭāl al-qawl bi-talāzum al-hayūlā wa-l-ṣūra wa-anna l-jism murakkab minhumā, a refutation of hylomorphism. Qāḍī Jaʿfar’s tract, of which only a fragment has come down to us, contains four extensive quotations from an unidentified philosophical work. These are strikingly similar to those cited by Rukn al-Dīn Ibn al-Malāḥimī (d. 536/1141) in his Tuḥfat al-mutakallimīn fī l-radd ʿalā l-falāsifa; likewise, Qāḍī Jaʿfar’s responses to the arguments of the philosophers closely resemble those given by Ibn al-Malāḥimī. However, a comparison of the relevant passages shows that the possibility that Qāḍī Jaʿfar had consulted Ibn al-Malāḥimī’s Tuḥfa as his source can safely be excluded. Both rather seemed to have relied on a common and so far unidentified source, possibly written by a Muʿtazilī author. Qāḍī Jaʿfar’s tract is thus another early Muʿtazilī critique of Avicennan philosophy that can shed some additional light on the reception of Ibn Sīnā’s (d. 428/1037) philosophy among the mutakallimūn before Ibn al-Malāḥimī.

scholarly journals A comparison of HONO budgets for two measurement heights at a field station within the boreal forest in Finland

2015 ◽  
Vol 15 (2) ◽  
pp. 799-813 ◽  
Author(s):  
R. Oswald ◽  
M. Ermel ◽  
K. Hens ◽  
A. Novelli ◽  
H. G. Ouwersloot ◽  
...  
Keyword(s):  
Boreal Forest ◽  
Gas Phase Reactions ◽  
Additional Source ◽  
Forest Environment ◽  
Field Station ◽  
Photostationary State ◽  
Unknown Source ◽  
Unidentified Source ◽  
Photolytic Decomposition ◽  
Atmospheric Concentrations

Abstract. Atmospheric concentrations of nitrous acid (HONO), one of the major precursors of the hydroxyl radical (OH) in the troposphere, significantly exceed the values predicted by the assumption of a photostationary state (PSS) during daytime. Therefore, additional sources of HONO were intensively investigated in the last decades. This study presents budget calculations of HONO based on simultaneous measurements of all relevant species, including HONO and OH at two different measurement heights, i.e. 1 m above the ground and about 2 to 3 m above the canopy (24 m above the ground), conducted in a boreal forest environment. We observed mean HONO concentrations of about 6.5 × 108 molecules cm−3 (26 ppt) during daytime, more than 20 times higher than expected from the PSS of 0.2 × 108 molecules cm−3 (1 ppt). To close the budgets at both heights, a strong additional source term during daytime is required. This unidentified source is at its maximum at noon (up to 1.1 × 106 molecules cm−3 s−1, 160 ppt h−1) and in general up to 2.3 times stronger above the canopy than close to the ground. The insignificance of known gas phase reactions and other processes like dry deposition or advection compared to the photolytic decomposition of HONO at this measurement site was an ideal prerequisite to study possible correlations of this unknown term to proposed HONO sources. But neither the proposed emissions from soils nor the proposed photolysis of adsorbed HNO3 contributed substantially to the unknown source. However, the unknown source was found to be perfectly correlated to the unbalanced photolytic loss of HONO.

scholarly journals EGRET Unidentified Source Radio Observations and Performance of Receiver Gain Calibration

2006 ◽  
Vol 31 ◽  
pp. 223-224 ◽  
Author(s):  
Kotaro Niinuma ◽  
Kuniyuki Asuma ◽  
Masaya Kuniyoshi ◽  
Nobuo Matsumura ◽  
Kazuhiro Takefuji ◽  
...  
Keyword(s):  
Radio Observations ◽  
Unidentified Source ◽  
And Performance

scholarly journals Description of Komagataella phaffii sp. nov. and the transfer of Pichia pseudopastoris to the methylotrophic yeast genus Komagataella

2005 ◽  
Vol 55 (2) ◽  
pp. 973-976 ◽  
Author(s):  
Cletus P. Kurtzman
Keyword(s):  
Type Strain ◽  
Yeast Species ◽  
Large Subunit ◽  
Methylotrophic Yeast ◽  
Ascomycetous Yeast ◽  
26S Rdna ◽  
Komagataella Phaffii ◽  
Oak Trees ◽  
Unidentified Source ◽  
Black Oak

The new methanol-assimilating yeast species Komagataella phaffii Kurtzman sp. nov. (type strain NRRL Y-7556T=CBS 2612T) is described. Of the four known strains of this species, two were isolated from black oak trees in California, USA, one from an Emory oak in Arizona, USA, and one from an unidentified source in Mexico. The species forms hat-shaped ascospores in deliquescent asci and appears to be homothallic. Analysis of nucleotide sequences from domains D1/D2 of large-subunit (26S) rDNA separates the new species from Komagataella pastoris, the type species of the genus, and from Pichia pseudopastoris, which is here renamed Komagataella pseudopastoris (Dlauchy, Tornai-Lehoczki, Fülöp & Péter) Kurtzman comb. nov. (type strain NRRL Y-27603T=CBS 9187T=NCAIM Y 01541T). On the basis of D1/D2 26S rDNA sequence analysis, the three species now assigned to the genus Komagataella represent a clade that is phylogenetically isolated from other ascomycetous yeast genera.

scholarly journals Comparison of HONO budgets for two measurement heights at a field station within the boreal forest (SMEAR II – HUMPPA-COPEC 2010)

2014 ◽  
Vol 14 (6) ◽  
pp. 7823-7857 ◽  
Author(s):  
R. Oswald ◽  
M. Ermel ◽  
K. Hens ◽  
A. Novelli ◽  
H. G. Ouwersloot ◽  
...  
Keyword(s):  
Boreal Forest ◽  
Gas Phase Reactions ◽  
Additional Source ◽  
Forest Environment ◽  
Field Station ◽  
Photostationary State ◽  
Unknown Source ◽  
Unidentified Source ◽  
Photolytic Decomposition ◽  
Atmospheric Concentrations

Abstract. Atmospheric concentrations of nitrous acid (HONO), one of the major precursors of the hydroxyl radical (OH) in the troposphere, normally exceed by far the values predicted by the assumption of a photostationary state (PSS) during daytime. Therefore, additional sources of HONO were intensively investigated in the last decades. Here, we present budget calculations of HONO based on simultaneous measurements of all relevant species including HONO and OH at two different measurement heights, i.e. 1 m above ground and about 2 to 3 m above canopy (24 m above ground), conducted in boreal forest environment. We observed mean HONO concentrations during daytime of about 6.5 × 108 molecules cm−3 (26 ppt), more than twenty times higher than expected from the PSS, 0.2 × 108 molecules cm−3 (1 ppt). To close the budgets in both heights a strong additional source term during daytime is required. This unidentified source is maximal at noon (up to 1.1 × 106 molecules cm−3 s−1, 160 ppt h−1) and in general up to 2.3 times stronger above the canopy than close to the ground. The insignificance of known gas phase reactions and also other processes like dry deposition or advection compared to the photolytic decomposition of HONO at this measurement site was an ideal prerequisite to study possible correlations of this unknown term to proposed HONO sources. But neither the proposed emissions from soils nor the proposed photolysis of adsorbed HNO3 contributed substantially to the unknown source. However, the unknown source was found to be perfectly correlated to the unbalanced photolytic loss of HONO.

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