47 research outputs found
Demonstration of a Transportable 1 Hz-Linewidth Laser
We present the setup and test of a transportable clock laser at 698 nm for a
strontium lattice clock. A master-slave diode laser system is stabilized to a
rigidly mounted optical reference cavity. The setup was transported by truck
over 400 km from Braunschweig to D\"usseldorf, where the cavity-stabilized
laser was compared to a stationary clock laser for the interrogation of
ytterbium (578 nm). Only minor realignments were necessary after the transport.
The lasers were compared by a Ti:Sapphire frequency comb used as a transfer
oscillator. The thus generated virtual beat showed a combined linewidth below 1
Hz (at 1156 nm). The transport back to Braunschweig did not degrade the laser
performance, as was shown by interrogating the strontium clock transition.Comment: 3 pages, 4 figure
Π£ΡΠΎΠ²Π΅Π½Ρ Π°Π½ΡΡΠΎΠΏΠΎΠ³Π΅Π½Π½ΠΎΠ³ΠΎ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡ Π½Π° ΡΠΊΠΎΡΠΈΡΡΠ΅ΠΌΡ ΠΊΠ°ΠΊ ΡΡΠ½ΠΊΡΠΈΡ ΡΠ²ΠΎΠΉΡΡΠ² ΡΠ°ΡΡΠΈΡΠ΅Π»ΡΠ½ΡΡ ΡΠΎΠΎΠ±ΡΠ΅ΡΡΠ².
The approach of estimation of a level of anthropogenic impact on ecosystems as a function of properties of plant associations has been proposed. In the course of investigation it was established that it is possible to estimate the growth degree of anthropogenic impact on ecosystem by: the increase part of a ruderal vegetation in common composition of plant associations; the increase amount of a ruderal vegetation growing on one square meter of soil surface (thickness of sowing); the increase of lead and cadmium content in above ground part of the plants. The sufficiently high ability of lead extraction from soil by such plants-accumulators as great nettle and meadow fescue has been establishedΠΡΠ΅Π»ΠΎΠΆΠ΅Π½ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ ΠΊ ΠΎΡΠ΅Π½ΠΊΠ΅ ΡΡΠΎΠ²Π½Ρ Π°Π½ΡΡΠΎΠΏΠΎΠ³Π΅Π½Π½ΠΎΠ³ΠΎ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡ Π½Π° ΡΠΊΠΎΡΠΈΡΡΠ΅ΠΌΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΡΡΠ½ΠΊΡΠΈΠΈ ΡΠ²ΠΎΠΉΡΡΠ² ΡΠ°ΡΡΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΡΠΎΠΎΠ±ΡΠ΅ΡΡΠ². Π Ρ
ΠΎΠ΄Π΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΠΎΠ± ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠΈ ΡΡΠ΅ΠΏΠ΅Π½ΠΈ Π°Π½ΡΡΠΎΠΏΠΎΠ³Π΅Π½Π½ΠΎΠ³ΠΎ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡ Π½Π° ΡΠΊΠΎΡΠΈΡΡΠ΅ΠΌΡ ΠΌΠΎΠΆΠ½ΠΎ ΡΡΠ΄ΠΈΡΡ ΠΏΠΎ: ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΡ Π΄ΠΎΠ»ΠΈ ΡΡΠ΄Π΅ΡΠ°Π»ΡΠ½ΡΡ
Π²ΠΈΠ΄ΠΎΠ² ΡΠ°ΡΡΠ΅Π½ΠΈΠΉ Π² ΠΎΠ±ΡΠ΅ΠΌ ΡΠΎΡΡΠ°Π²Π΅ ΡΠ°ΡΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΠΎΠ±ΡΠ΅ΡΡΠ²Π°; ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΡ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π° ΡΡΠ΄Π΅ΡΠ°Π»ΡΠ½ΡΡ
ΡΠ°ΡΡΠ΅Π½ΠΈΠΉ, ΠΏΡΠΎΠΈΠ·ΡΠ°ΡΡΠ°Ρ-ΡΠΈΡ
Π½Π° ΠΎΠ΄Π½ΠΎΠΌ ΠΊΠ²Π°Π΄ΡΠ°ΡΠ½ΠΎΠΌ ΠΌΠ΅ΡΡΠ΅ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ (Π³ΡΡΡΠΎΡΠ° ΡΡΠΎΡΠ½ΠΈΡ); ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΡ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ ΡΠ²ΠΈΠ½ΡΠ° ΠΈ ΠΊΠ°Π΄ΠΌΠΈΡ Π² Π½Π°Π·Π΅ΠΌΠ½ΠΎΠΉ ΡΠ°ΡΡΠΈ ΡΠ°ΡΡΠ΅Π½ΠΈΠΉ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Π° Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ Π²ΡΡΠΎΠΊΠ°Ρ ΡΠΏΠΎΡΠΎΠ±Π½ΠΎΡΡΡ ΠΈΠ·Π²Π»Π΅ΡΠ΅Π½ΠΈΡ ΡΠ²ΠΈΠ½ΡΠ° ΠΈΠ· ΠΏΠΎΡΠ²Ρ ΡΠ°ΠΊΠΈΠΌΠΈ ΡΠ°ΡΡΠ΅Π½ΠΈΡΠΌΠΈ-Π°ΠΊΠΊΡΠΌΡΠ»ΡΡΠΎΡΠ°ΠΌΠΈ, ΠΊΠ°ΠΊ ΠΊΡΠ°ΠΏΠΈΠ²Π° Π΄Π²ΡΠ΄ΠΎΠΌΠ½Π°Ρ ΠΈ ΠΎΠ²ΡΡΠ½ΠΈΡΠ° Π»ΡΠ³ΠΎΠ²Π°Ρ
ΠΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΡΠ½ΡΠ°ΡΠ½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ Π² ΠΏΡΠΎΡΠ΅ΡΡΠ΅ ΡΠΈΡΠΎΡΠΊΡΡΡΠ°ΠΊΡΠΈΠΈ ΡΠ²ΠΈΠ½ΡΠ° ΠΈ ΠΊΠ°Π΄ΠΌΠΈΡ ΠΈΠ· Π·Π°Π³ΡΡΠ·Π½Π΅Π½Π½ΡΡ ΠΏΠΎΡΠ²
Succinic acid influence on migration properties of lead and cadmium in soil-plant system has been investigated. It has been shown that the addition the activator (succinic acid) into soil increases the efficiency of phytoextraction of lead and cadmium. The optimum conditions of succinic acid usage as the process activator have been established.Π ΡΠ°Π±ΠΎΡΠ΅ ΠΈΠ·ΡΡΠ΅Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΠ½ΡΠ°ΡΠ½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ Π½Π° ΠΌΠΈΠ³ΡΠ°ΡΠΈΠΎΠ½Π½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΡΠ²ΠΈΠ½ΡΠ° ΠΈ ΠΊΠ°Π΄ΠΌΠΈΡ Π² ΡΠΈΡΡΠ΅ΠΌΠ΅ Β«ΠΏΠΎΡΠ²Π°-ΡΡΡΠ΅Π½ΠΈΡΒ». Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π²Π½Π΅ΡΠ΅Π½ΠΈΠ΅ Π² ΠΏΠΎΡΠ²Ρ Π°ΠΊΡΠΈΠ²Π°ΡΠΎΡΠ° - ΡΠ½ΡΠ°ΡΠ½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ ΠΏΠΎΠ²ΡΡΠ°Π΅Ρ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΏΡΠΎΡΠ΅ΡΡΠ° ΡΠΈΡΠΎΡΠΊΡΡΡΠ°ΠΊΡΠΈΠΈ ΡΠ²ΠΈΠ½ΡΠ° ΠΈ ΠΊΠ°Π΄ΠΌΠΈΡ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Ρ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΠ΅ ΡΡΠ»ΠΎΠ²ΠΈΡ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΠ½ΡΠ°ΡΠ½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π°ΠΊΡΠΈΠ²Π°ΡΠΎΡΠ° ΠΏΡΠΎΡΠ΅ΡΡΠ°
Succinic acid influence on migration properties of lead and cadmium in soil-plant system
Succinic acid influence on migration properties of lead and cadmium in soil-plant system has been investigated. It has been shown that the addition the activator (succinic acid) into soil increases the efficiency of phytoextraction of lead and cadmium. The optimum conditions of succinic acid usage as the process activator have been established
The Level Of Anthropogenic Impact On Ecosystems As A Function Of Properties Of Plant Associations
The approach of estimation of a level of anthropogenic impact on ecosystems as a function of properties of plant associations has been proposed. In the course of investigation it was established that it is possible to estimate the growth degree of anthropogenic impact on ecosystem by: the increase part of a ruderal vegetation in common composition of plant associations; the increase amount of a ruderal vegetation growing on one square meter of soil surface (thickness of sowing); the increase of lead and cadmium content in above ground part of the plants. The sufficiently high ability of lead extraction from soil by such plants-accumulators as great nettle and meadow fescue has been establishe