scholarly journals Seasonal Variations of Some Physico-Chemical Properties of River Ethiope Water in Abraka, Nigeria

2010 ◽  
Vol 13 (1) ◽  
Author(s):  
PO Agbaire ◽  
CG Obi
Keyword(s):  
Seasonal Variations ◽  
Chemical Properties ◽  
Physico Chemical

scholarly journals Seasonal Variations in Physico-Chemical Properties and Biodiversity in Betana Pond, Eastern Nepal

Our Nature ◽  
1970 ◽  
Vol 8 (1) ◽  
pp. 212-218
Author(s):  
B. Niroula ◽  
K.L.B. Singh ◽  
G.B. Thapa ◽  
J. Pal
Keyword(s):  
Carbon Dioxide ◽  
Seasonal Variations ◽  
Aquatic Macrophytes ◽  
Chemical Properties ◽  
Chloride Content ◽  
Pond Water ◽  
Chemical Parameters ◽  
Seasonal Fluctuations ◽  
Physico Chemical ◽  
Different Characteristics

A total of 62 species of aquatic macrophytes belonging to 33 families (Alga 1, Bryophyte 1, Pteridophytes 5, Angiospermic dicots 25 and monocots 31) and 38 species of aquatic macro-fauna (Birds 17, Reptiles 3, Amphibians 3, Fishes 12, Molluscs 1 and Arthropods 2) were recorded from Betana pond, eastern Nepal. Physico-chemical parameters of the pond water displayed different characteristics with seasons. More seasonal fluctuations in turbidity (0.76-26.01 NTU), carbon dioxide (4.58-73.92 mg/l) and chloride content (2.0-7.0 mg/l) were recorded in the pond.DOI: 10.3126/on.v8i1.4330

scholarly journals Seasonal variations of some physico-chemical properties of water sources that feed Rivers Wouri and Meme of Cameroon

2019 ◽  
Vol 13 (11) ◽  
pp. 425-438
Author(s):  
Nkafu Fomenky Norbert ◽  
Suh Tening Aaron ◽  
Azinwie Asongwe Godswill ◽  
Mbene Kenneth ◽  
Fomenky Nka-Folep Folep
Keyword(s):  
Seasonal Variations ◽  
Chemical Properties ◽  
Water Sources ◽  
Physico Chemical

Decoration of specific sites on freeze-fractured membranes

1978 ◽  
Vol 36 (2) ◽  
pp. 140-141
Author(s):  
H. Gross ◽  
H. Moor
Keyword(s):  
Pure Water ◽  
Freeze Fracture ◽  
Chemical Properties ◽  
Surface Forces ◽  
Sulfate Pentahydrate ◽  
Copper Sulfate Pentahydrate ◽  
Physico Chemical ◽  
Water Of Hydration ◽  
Small Container ◽  
Binding Forces

Fracturing under ultrahigh vacuum (UHV, p ≤ 10-9 Torr) produces membrane fracture faces devoid of contamination. Such clean surfaces are a prerequisite foe studies of interactions between condensing molecules is possible and surface forces are unequally distributed, the condensate will accumulate at places with high binding forces; crystallites will arise which may be useful a probes for surface sites with specific physico-chemical properties. Specific “decoration” with crystallites can be achieved nby exposing membrane fracture faces to water vopour. A device was developed which enables the production of pure water vapour and the controlled variation of its partial pressure in an UHV freeze-fracture apparatus (Fig.1a). Under vaccum (≤ 10-3 Torr), small container filled with copper-sulfate-pentahydrate is heated with a heating coil, with the temperature controlled by means of a thermocouple. The water of hydration thereby released enters a storage vessel.

Physico-Chemical Properties of Recombinant Desulphatohirudin

1990 ◽  
Vol 63 (03) ◽  
pp. 499-504 ◽  
Author(s):  
A Electricwala ◽  
L Irons ◽  
R Wait ◽  
R J G Carr ◽  
R J Ling ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Gel Filtration ◽  
Chemical Properties ◽  
Alpha Helix ◽  
Apparent Molecular Weight ◽  
Correlation Spectroscopy ◽  
Nmr Studies ◽  
Recombinant Hirudin ◽  
Physico Chemical ◽  
Recombinant Molecule

SummaryPhysico-chemical properties of recombinant desulphatohirudin expressed in yeast (CIBA GEIGY code No. CGP 39393) were reinvestigated. As previously reported for natural hirudin, the recombinant molecule exhibited abnormal behaviour by gel filtration with an apparent molecular weight greater than that based on the primary structure. However, molecular weight estimation by SDS gel electrophoresis, FAB-mass spectrometry and Photon Correlation Spectroscopy were in agreement with the theoretical molecular weight, with little suggestion of dimer or aggregate formation. Circular dichroism studies of the recombinant molecule show similar spectra at different pH values but are markedly different from that reported by Konno et al. (13) for a natural hirudin-variant. Our CD studies indicate the presence of about 60% beta sheet and the absence of alpha helix in the secondary structure of recombinant hirudin, in agreement with the conformation determined by NMR studies (17)

Physico-chemical properties of the rare-earth metals, scandium, and yttrium

1963 ◽  
Vol 79 (2) ◽  
pp. 263-293 ◽  
Author(s):  
E.M. Savitskii ◽  
V.F. Terekhova ◽  
O.P. Naumkin
Keyword(s):  
Rare Earth ◽  
Rare Earth Metals ◽  
Chemical Properties ◽  
Physico Chemical ◽  
The Rare Earth

Physico chemical properties and gas adsorption separation characteristics of Itaya zeolite and its modified products.

1990 ◽  
Vol 39 (442) ◽  
pp. 996-1000 ◽  
Author(s):  
Ayao TAKASAKA ◽  
Hideyuki NEMOTO ◽  
Hirohiko KONO ◽  
Yoshihiro MATSUDA
Keyword(s):  
Gas Adsorption ◽  
Chemical Properties ◽  
Physico Chemical
Sign in / Sign up

Export Citation Format

Share Document