Isotopic and chemical composition of water and steam discharges from volcanic-magmatic-hydrothermal systems of the Guanacaste Geothermal Province, Costa Rica

1992 ◽  
Vol 7 (4) ◽  
pp. 309-332 ◽  
Author(s):  
Werner F. Giggenbach ◽  
Rodrigo Corrales Soto
Keyword(s):  
Costa Rica ◽  
Chemical Composition ◽  
Hydrothermal Systems ◽  
Chemical Composition Of Water

scholarly journals Intestinal Glycoproteins of Germfree Rats. II. Further Studies of the Chemical Composition of Water-soluble Extracts from Intestinal Mucus.

1973 ◽  
Vol 27 ◽  
pp. 2997-3002 ◽  
Author(s):  
Jens K. Wold ◽  
Tore Midtvedt ◽  
Randi Winsnes ◽  
Petri Pajunen ◽  
Jouko Koskikallio ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Water Soluble ◽  
Intestinal Mucus ◽  
Chemical Composition Of Water ◽  
Germfree Rats

scholarly journals The chemical composition and antimicrobial activity of the leaf oil ofCupressus lusitanicafrom Monteverde, Costa Rica

2010 ◽  
Vol 2 (1) ◽  
pp. 19 ◽  
Author(s):  
WilliamN Setzer ◽  
SaraL Hassanzadeh ◽  
JessikaA Tuten ◽  
Bernhard Vogler
Keyword(s):  
Antimicrobial Activity ◽  
Costa Rica ◽  
Chemical Composition ◽  
Leaf Oil

Water Quality of Lake Iskanderkul and Its Tributaries

2020 ◽  
Vol 6 (2) ◽  
pp. 79-88
Author(s):  
Z.O. Normakhmedova ◽  
◽  
A.V. Mitusov
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Chemical Composition ◽  
Fish Farming ◽  
Natural Phenomena ◽  
Change Dynamics ◽  
Chemical Composition Of Water ◽  
Study Results ◽  
Copper Zinc

This article presents the study results of the change dynamics in the chemical composition of water in Lake Iskanderkul and the rivers flowing into it, as well as the comparison of water quality in the water bodies of the Iskanderkul Basin and several mid-stream tributaries of the Zarafshan River. It was established that the chemical composition of water in Lake Iskanderkul and its tributaries meets the requirements of the corresponding state standard (GOST 2874-82 “Drinking Water”). However, in terms of dissolved oxygen, copper, zinc, lead and iron the water in Lake Iskanderkul does not satisfy fish farming requirements. The main water pollution sources in the area include such natural phenomena as floods, avalanches, mudslides, and rock dissolution.

scholarly journals Chemical Compositions of the Bark Essential Oils of Croton Monteverdensis and Croton Niveus from Monteverde, Costa Rica

2006 ◽  
Vol 1 (7) ◽  
pp. 1934578X0600100 ◽  
Author(s):  
William N. Setzer
Keyword(s):  
Costa Rica ◽  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Chemical Compositions ◽  
Medicinal Uses ◽  
Oil Components

The essential oils of the barks of Croton monteverdensis Huft and C. niveus Jacq. (Euphorbiaceae) from Monteverde, Costa Rica, were isolated by hydrodistillation in yields of 0.03% and 0.10%, respectively. The chemical composition of the oils was determined by GC–MS. The most abundant essential oil components of C. monteverdensis were α-pinene (17.1%), β-pinene (10.5%), and linalool (8.3%), while C. niveus bark oil was made up largely of α-pinene (14.4%), 1,8-cineole (11.6%), and borneol (8.5%). The major components account for the fragrances and are consistent with the traditional medicinal uses of these plants.

scholarly journals Analysis of the Leaf Essential Oil of Stauranthus perforatus from Monteverde, Costa Rica

2006 ◽  
Vol 1 (3) ◽  
pp. 1934578X0600100 ◽  
Author(s):  
Jennifer M. Schmidt ◽  
William N. Setzer
Keyword(s):  
Costa Rica ◽  
Chemical Composition ◽  
Essential Oil ◽  
Germacrene D ◽  
Leaf Essential Oil ◽  
Oil Components

The leaf essential oil of Stauranthus perforatus Leibm. (Rutaceae) from Monteverde, Costa Rica, was isolated by hydrodistillation and the chemical composition determined by GC–MS. The most abundant essential oil components were α-pinene, germacrene D, and α-cadinol.

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