scholarly journals Analisis Tingkat Erosi pada Sungai Konaweha di Kabupaten Konawe

2021 ◽  
Vol 4 (1) ◽  
pp. 46
Author(s):  
Putra Sakti

Erosion causes the loss of a fertile layer of soil and good for crop growth as well as reduced soil ability to absorb and retain water. The transported land will be deposited elsewhere, in rivers, reservoirs, lakes, irrigation channels, on farmland and so on. The purpose of this research is to analyze the large rainfall of the Konaweha River area. Analyzes large actual erosion (EA) & Potential Erosion (Ep), the average that occurs on the Konaweha River every year.The method used to calculate average maximum rainfall is arithmetic.Based on the results of analysis gained on erosion at the upper Abuki River, the location in Konawe district, can be concluded as follows:So the magnitude of actual erosion (Ea) on average that occurs on the river Konaweha every year coming 5.829 tons/ha/year, and potential erosion (Ep) on average that occurs on the river Konaweha every year coming 196.246 tons/ha/year.

1997 ◽  
Vol 161 ◽  
pp. 711-717 ◽  
Author(s):  
John W. Dreher ◽  
D. Kent Cullers

AbstractWe develop a figure of merit for SETI observations which is anexplicitfunction of the EIRP of the transmitters, which allows us to treat sky surveys and targeted searches on the same footing. For each EIRP, we calculate the product of terms measuring the number of stars within detection range, the range of frequencies searched, and the number of independent observations for each star. For a given set of SETI observations, the result is a graph of merit versus transmitter EIRP. We apply this technique to several completed and ongoing SETI programs. The results provide a quantitative confirmation of the expected qualitative difference between sky surveys and targeted searches: the Project Phoenix targeted search is good for finding transmitters in the 109to 1014W range, while the sky surveys do their best at higher powers. Current generation optical SETI is not yet competitive with microwave SETI.


2006 ◽  
Vol 40 (12) ◽  
pp. 53
Author(s):  
SHARON WORCESTER
Keyword(s):  

2005 ◽  
Vol 36 (5) ◽  
pp. 26
Author(s):  
Michele G. Sullivan
Keyword(s):  

2020 ◽  
Vol 90 (5-6) ◽  
pp. 411-416 ◽  
Author(s):  
Carina Kolot ◽  
Ana Rodriguez-Mateos ◽  
Rodrigo Feliciano ◽  
Katharina Bottermann ◽  
Wilhelm Stahl

Abstract. Chalcones are a type of flavonoids characterized by an α-β unsaturated structural element which may react with thiol groups to activate pathways such as the Nrf2-Keap-1 system. Naringenin chalcone is abundant in the diet but little is known about its bioavailability. In this work, the bioavailability of naringenin chalcone from tomatoes was investigated in a group of healthy men (n=10). After ingestion of 600 grams of tomatoes providing a single dose of 17.3 mg naringenin chalcone, 0.2 mg of naringenin, and 195 mg naringin plasma levels of free and conjugated naringenin and naringenin chalcone (glucuronide and sulfate) were analyzed by UHPLC-QTOF-MS at 0.5, 1, 3, and 6 h post-consumption. Plasma levels of conjugated naringenin increased to about 12 nmol/L with a maximum at about 3 h. Concentrations of free naringenin hardly elevated above baseline. Plasma levels of free and conjugated naringenin chalcone significantly increased. A maximum of the conjugated chalcone was reached at about 3 h after ingestion with an average concentration of about 0.5 nmol/L. No free chalcone was detectable at baseline but low amounts of the unconjugated compound could be detected with an average maximum of 0.8 nmol/L at about 1 h after ingestion. The data demonstrate that naringenin chalcone is bioavailable in humans from cherry tomatoes as a dietary source. However, availability is poor and intramolecular cyclisation as well as extended metabolism likely contribute to the inactivation of the reactive alpha-beta unsaturated reactive center as well as the excretion of the biologically active molecule, respectively.


1977 ◽  
Vol 32 (11) ◽  
pp. 987-987
Author(s):  
Raymond A. Winbush
Keyword(s):  

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