W P Gibson,R G Burns
W P Gibson
The disappearance of the organophosphorus insecticide, malathion, from a silt loam soil and from its organic and inorganic components was examined. Half-lives and the time taken for 90% decomposition in nonsterile, sodium azide-treated, and...
The combined relationship of temperature and molybdenum concentration to nitrogen fixation byAnabaena cylindrica [0.03%]
温度和钼浓度对链丝状鱼腥藻固氮作用的联合影响
R Jacobs,O Lind
R Jacobs
The joint effects of growth temperature, incubation temperature, and molybdenum concentration on the nitrogen fixation rate ofAnabaena cylindrica were determined using the acetylene-reduction technique. The nitrogen-fixation response to inc...
Denitrification in salt marsh sediments: Evidence for seasonal temperature selection among populations of denitrifiers [0.03%]
盐沼沉积物中的反硝化作用——反硝化菌种群随季节温度变化而选择的证据
W A Kaplan,J M Teal,I Valiela
W A Kaplan
Direct measurements of bacterial denitrification in salt marsh sediments near Woods Hole, Massachusetts were made over a 10-month period using a simple and precise gas-chromatographic technique. Based on laboratory experiments at 5°, 10°,...
U Simidu,E Kaneko,N Taga
U Simidu
The generic composition of the heterotrophic bacterial population of Tokyo Bay, which is now highly polluted and eutrophic, was compared with that of the adjacent, less polluted regions of Sagami Bay and Suruga Bay. Members of Vibrionaceae ...
M M Roper,K C Marshall
M M Roper
F J Post
F J Post
The Great Salt Lake is actually two lakes. A highly saline (330-gml(-1)) northern arm and a moderately saline (120-gml(-1)) southern arm separated by a semipermeable rock causeway. The lake, particularly the northern arm, has a massive accu...
E Villarreal,R R Canale,Z Akcasu
E Villarreal
A transport equation is used which describes the temporal behavior of interacting populations in changing environments. The formulation takes into account the internal state variables of the individuals. The general theory is applied to the...
Competition for inorganic substrates among chemoorganotrophic and chemolithotrophic bacteria [0.03%]
化学有机营养型和无机营养型细菌对无机底物的竞争
J G Kuenen,J Boonstra,H G Schröder et al.
J G Kuenen et al.
In aerobic enrichment experiments with a chemostat, using phosphate-limited lactate medium, aSpirillum sp. predominated at the lower range of dilution rates. At the higher dilution rates an (chemoorganotrophic) unidentified rod-shaped bacte...
Immunochemical investigation of four Saprolegnia species with parasitic activity in fish: Serological and kinetic characterization of a chymotrypsin-like activity [0.03%]
四种鱼类寄生性丝囊霉属真菌的免疫化学研究：抗血清和酶活性动力学特征的研究
R Peduzzi,S Bizzozero
R Peduzzi
The antigenic structure of four aquatic Phycomycetes of the genusSaprolegnia with parasitic activity in fish was analyzed with immunoelectrophoresis and double diffusion techniques. It is shown that these serological tests might represent a...
The effect of sulfide on the blue-green algae of hot springs II. Yellowstone National Park [0.03%]
热泉中硫化物对蓝绿藻作用第2部分：黄石国家公园
R W Castenholz
R W Castenholz
In the Mammoth Springs (Yellowstone National Park) waters with near neutral pH and soluble sulfide (H2S, HS(-), S(2-)) of over 1-2 mg/liter (30-60ΜM) are characterized by substrate covers of phototrophic bacteria (Chloroflexus and aChlorob...