200 research outputs found
Π‘ΠΊΠ΅Π»Π΅ΡΠ½Π°Ρ ΠΈΠ·ΠΎΠΌΠ΅ΡΠΈΠ·Π°ΡΠΈΡ Π³Π΅ΠΏΡΠ°Π½ΠΎΠ² Π² ΠΏΡΠΈΡΡΡΡΡΠ²ΠΈΠΈ ΡΡΠΏΠ΅ΡΠΊΠΈΡΠ»ΠΎΡΠ½ΡΡ ΠΊΠ°ΡΠ°Π»ΠΈΠ·Π°ΡΠΎΡΠΎΠ² ΡΠ°Π·Π»ΠΈΡΠ½ΠΎΠΉ ΠΏΡΠΈΡΠΎΠ΄Ρ
The sequence of the formation of multi-branched heptane isomers was studied in liquid and gaseous phases over different liquid and solid superacid catalysts. It was found that this sequence does not depend on the phase state, catalyst nature, and conditions, evidencing in favor of common reaction mechanism. The 2,4-dimethylpentane transformation into 2,2-dimethylpentane can be explained by the intermediate formation of cyclobutyl carbocation.ΠΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΎ ΠΈΠ·ΡΡΠ΅Π½Π° ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΡ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ ΡΠ°Π·Π²Π΅ΡΠ²Π»Π΅Π½Π½ΡΡ
ΠΈΠ·ΠΎΠΌΠ΅ΡΠΎΠ² ΠΏΡΠΈ ΠΏΡΠ΅Π²ΡΠ°ΡΠ΅Π½ΠΈΠΈ Π½-Π³Π΅ΠΏΡΠ°Π½Π° Π² ΠΆΠΈΠ΄ΠΊΠΎΠΉ ΠΈ Π³Π°Π·ΠΎΠ²ΠΎΠΉ ΡΠ°Π·Π°Ρ
ΠΏΠΎΠ΄ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ΠΌ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΆΠΈΠ΄ΠΊΠΈΡ
ΠΈ ΡΠ²Π΅ΡΠ΄ΠΎΠ³ΠΎ ΡΡΠΏΠ΅ΡΠΊΠΈΡΠ»ΠΎΡΠ½ΡΡ
ΠΊΠ°ΡΠ°Π»ΠΈΠ·Π°ΡΠΎΡΠΎΠ². ΠΠ°ΠΉΠ΄Π΅Π½ΠΎ, ΡΡΠΎ ΡΡΠ° ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΡ Π½Π΅ Π·Π°Π²ΠΈΡΠΈΡ ΠΎΡ ΡΠ°Π·ΠΎΠ²ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ, ΠΏΡΠΈΡΠΎΠ΄Ρ ΠΊΠ°ΡΠ°Π»ΠΈΠ·Π°ΡΠΎΡΠΎΠ² ΠΈ ΡΡΠ»ΠΎΠ²ΠΈΠΉ, ΡΡΠΎ ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΡΠ΅Ρ ΠΎΠ± ΠΎΠ±ΡΠ΅ΠΌ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠ΅ ΡΠ΅Π°ΠΊΡΠΈΠΈ. ΠΡΠ΅Π²ΡΠ°ΡΠ΅Π½ΠΈΠ΅ 2,4-Π΄ΠΈΠΌΠ΅ΡΠΈΠ»ΠΏΠ΅Π½ΡΠ°Π½Π° Π² 2,2-Π΄ΠΈΠΌΠ΅ΡΠΈΠ»ΠΏΠ΅Π½ΡΠ°Π½ ΠΌΠΎΠΆΠ½ΠΎ ΠΎΠ±ΡΡΡΠ½ΠΈΡΡ ΠΏΡΠΎΠΌΠ΅ΠΆΡΡΠΎΡΠ½ΡΠΌ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΠΈΠΊΠ»ΠΎΠ±ΡΡΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ ΠΊΠ°ΡΠ±ΠΊΠ°ΡΠΈΠΎΠ½Π°
DNA repair, genome stability and cancer: a historical perspective
The multistep process of cancer progresses over many years. The prevention of mutations by DNA repair pathways led to an early appreciation of a role for repair in cancer avoidance. However, the broader role of the DNA damage response (DDR) emerged more slowly. In this Timeline article, we reflect on how our understanding of the steps leading to cancer developed, focusing on the role of the DDR. We also consider how our current knowledge can be exploited for cancer therapy
Physiological differences in Rhododendron calophytum seedlings regenerated in mineral soil or on fallen dead wood of different decaying stages
Skeletal isomerization of heptanes over superacid catalysts of different nature
The sequence of the formation of multi-branched heptane isomers was studied in liquid and gaseous phases over different liquid and solid superacid catalysts. It was found that this sequence does not depend on the phase state, catalyst nature, and conditions, evidencing in favor of common reaction mechanism. The 2,4-dimethylpentane transformation into 2,2-dimethylpentane can be explained by the intermediate formation of cyclobutyl carbocation
MΓ©tabolisme Des Esters PhosphorΓ©s Dans Le Sartorius De Rana Temporaria TraitΓ© Par Une Solution De Ringer Hypertonique
- β¦