1,074 research outputs found
Guided wave Generation in Elastic Layered Substrates with Piezoelectric Coatings and Patches
AbstractPiezoelectrically generated surface and pseudosurface acoustic waves are simulated and analyzed in the mathematical framework based on the integral representations and guided wave asymptotics. In addition to the abilities of the conventional modal analysis, the integral equation approach explicitly provides the amplitudes of waves generated by a specified source, making it possible to evaluate the wave energy transmitted from the source into the substrate and its distribution among the excited guided waves. Diamond based microdevices and piezoelectric patch actuators are considered as examples
Crucial words for abelian powers
A word is "crucial" with respect to a given set of "prohibited words" (or
simply "prohibitions") if it avoids the prohibitions but it cannot be extended
to the right by any letter of its alphabet without creating a prohibition. A
"minimal crucial word" is a crucial word of the shortest length. A word W
contains an "abelian k-th power" if W has a factor of the form X_1X_2...X_k
where X_i is a permutation of X_1 for 2<= i <= k. When k=2 or 3, one deals with
"abelian squares" and "abelian cubes", respectively.
In 2004 (arXiv:math/0205217), Evdokimov and Kitaev showed that a minimal
crucial word over an n-letter alphabet A_n = {1,2,..., n} avoiding abelian
squares has length 4n-7 for n >= 3. In this paper we show that a minimal
crucial word over A_n avoiding abelian cubes has length 9n-13 for n >= 5, and
it has length 2, 5, 11, and 20 for n=1, 2, 3, and 4, respectively. Moreover,
for n >= 4 and k >= 2, we give a construction of length k^2(n-1)-k-1 of a
crucial word over A_n avoiding abelian k-th powers. This construction gives the
minimal length for k=2 and k=3. For k >= 4 and n >= 5, we provide a lower bound
for the length of crucial words over A_n avoiding abelian k-th powers.Comment: 14 page
Unrepairable substrates of nucleotide excision repair and their application to suppress the activity of this repair system
In the previous studies, the DNA with the bulky Fap-dC derivative was demonstrated to be a difficult substrate for the nucleotide excision repair (NER), a system which is involved in the removal of bulky lesions from DNA. This type of compounds could be of particular interest as possible selective NER, considerably reducing the potency of DNA repair due to competitive immobilization of protein factors involved in this process. This approach can be potentially useful to increase the efficiency of chemotherapy. Aim. To identify DNA structures containing multiple bulky adducts that can efficiently inhibit the nucleotide excision repair. Methods. Enzymatic DNA synthesis, PCR, NER-competent cell extract preparation, in vitro NER assay, HPLC. Results. The conditions for the synthesis of extended DNA containing multiple unrepairable lesions were established. A wide range of DNA structures containing modified nucleotides was obtained. All modified DNAs were shown to inhibit the in vitro activity of the NER system. The DNA structure that inhibits the NER activity with the highest efficiency was selected. Conclusions. The model DNA structures effectively inhibiting the activity of NER were found. The new data obtained here can potentially be used for both basic and applied research.Π£ Π½Π°ΡΠΈΡ
ΠΏΠΎΠΏΠ΅ΡΠ΅Π΄Π½ΡΡ
Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½ΡΡ
Π±ΡΠ»ΠΎ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΠΎ ΠΠΠ Π· ΠΎΠ±'ΡΠΌΠ½ΠΈΠΌ ΠΏΠΎΡ
ΡΠ΄Π½ΠΈΠΌ Fap-dC Ρ ΡΠΊΠ»Π°Π΄Π½ΠΎΡΠ΅ΠΏΠ°ΡΠΎΠ²Π°Π½ΠΈΠΌ ΡΡΠ±ΡΡΡΠ°ΡΠΎΠΌ Π΄Π»Ρ ΡΠΈΡΡΠ΅ΠΌΠΈ Π΅ΠΊΡΡΠΈΠ·ΡΠΉΠ½ΠΎΡ ΡΠ΅ΠΏΠ°ΡΠ°ΡΡΡ Π½ΡΠΊΠ»Π΅ΠΎΡΠΈΠ΄ΡΠ² (ΠΡΠ½). Π'ΡΠ΄Π½Π°Π½Π½Ρ ΡΠ°ΠΊΠΎΠ³ΠΎ ΡΠΈΠΏΡ ΠΌΠΎΠΆΡΡΡ ΡΡΠ°Π½ΠΎΠ²ΠΈΡΠΈ ΠΎΡΠΎΠ±Π»ΠΈΠ²ΠΈΠΉ ΡΠ½ΡΠ΅ΡΠ΅Ρ ΡΠΊ ΠΌΠΎΠΆΠ»ΠΈΠ²Ρ ΡΠ΅Π»Π΅ΠΊΡΠΈΠ²Π½Ρ ΡΠ½Π³ΡΠ±ΡΡΠΎΡΠΈ ΡΠΈΡΡΠ΅ΠΌΠΈ ΠΡΠ½, Π·Π½Π°ΡΠ½ΠΎ Π·Π½ΠΈΠΆΡΡΡΠΈ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΡΡΡΡ ΡΠ΅ΠΏΠ°ΡΠ°ΡΡΡ ΠΠΠ ΡΠ»ΡΡ
ΠΎΠΌ Π·Π²'ΡΠ·ΡΠ²Π°Π½Π½Ρ Π±ΡΠ»ΠΊΠΎΠ²ΠΈΡ
ΡΠΈΠ½Π½ΠΈΠΊΡΠ², Π·Π°Π»ΡΡΠ΅Π½ΠΈΡ
Π΄ΠΎ Π΄Π°Π½ΠΎΠ³ΠΎ ΠΏΡΠΎΡΠ΅ΡΡ. Π¦Π΅ΠΉ ΠΏΡΠ΄Ρ
ΡΠ΄ ΠΌΠΎΠΆΠ΅ Π±ΡΡΠΈ ΠΏΠΎΡΠ΅Π½ΡΡΠΉΠ½ΠΎ ΠΊΠΎΡΠΈΡΠ½ΠΈΠΉ Π΄Π»Ρ ΠΏΡΠ΄Π²ΠΈΡΠ΅Π½Π½Ρ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ Ρ
ΡΠΌΡΠΎΡΠ΅ΡΠ°ΠΏΡΡ. ΠΠ΅ΡΠ°. ΠΠ°Π½Π΅ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½Ρ ΡΠΏΡΡΠΌΠΎΠ²Π°Π½Π΅ Π½Π° ΠΏΠΎΡΡΠΊ ΠΠΠ-ΡΡΡΡΠΊΡΡΡ, ΡΠΎ ΠΌΡΡΡΡΡΡ ΠΌΠ½ΠΎΠΆΠΈΠ½Π½Ρ ΠΎΠ±'ΡΠΌΠ½Ρ Π°Π΄Π΄ΡΠΊΡΠΈ, ΡΠΊΡ Π· Π½Π°ΠΉΠ±ΡΠ»ΡΡΠΎΡ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΡΡΡΡ ΠΌΠΎΠΆΡΡΡ ΠΏΡΠΈΠ³Π½ΡΡΡΠ²Π°ΡΠΈ Π°ΠΊΡΠΈΠ²Π½ΡΡΡΡ ΡΠΈΡΡΠ΅ΠΌΠΈ. ΠΠ΅ΡΠΎΠ΄ΠΈ. Π€Π΅ΡΠΌΠ΅Π½ΡΠ°ΡΠΈΠ²Π½ΠΈΠΉ ΡΠΈΠ½ΡΠ΅Π· ΠΠΠ, ΠΠΠ , ΠΏΡΠΈΠ³ΠΎΡΡΠ²Π°Π½Π½Ρ ΠΡΠ½-ΠΊΠΎΠΌΠΏΠ΅ΡΠ΅Π½ΡΠ½ΠΈΡ
ΠΊΠ»ΡΡΠΈΠ½Π½ΠΈΡ
Π΅ΠΊΡΡΡΠ°ΠΊΡΡΠ², ΡΠ΅Π°ΠΊΡΡΡ Π²ΠΈΡΡΠ·Π°Π½Π½Ρ, ΡΠΎ ΠΊΠ°ΡΠ°Π»ΡΠ·ΡΡΡΡΡΡ Π±ΡΠ»ΠΊΠ°ΠΌΠΈ ΠΡΠ½ in vitro, ΠΠΠ Π₯. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΠΈ. ΠΡΠΎΠ²Π΅Π΄Π΅Π½ΠΎ ΠΏΡΠ΄Π±ΡΡ ΡΠΌΠΎΠ² ΡΠΈΠ½ΡΠ΅Π·Ρ ΠΏΡΠΎΡΡΠΆΠ½ΠΈΡ
ΠΌΠΎΠ΄Π΅Π»ΡΠ½ΠΈΡ
ΠΠΠ Π· ΠΌΠ½ΠΎΠΆΠΈΠ½Π½ΠΈΠΌ Π²ΠΊΠ»ΡΡΠ΅Π½Π½ΡΠΌ Π½Π΅ΡΠ΅ΠΏΠ°ΡΠΎΠ²Π°Π½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΊΠΎΠ΄ΠΆΠ΅Π½Π½Ρ Fap-dC. ΠΡΡΠΈΠΌΠ°Π½ΠΎ ΡΡΠ΄ ΠΠΠ-ΡΡΡΡΠΊΡΡΡ, ΡΠΎ ΠΌΡΡΡΠΈΡΡ Π² ΡΠ²ΠΎΡΠΌΡ ΡΠΊΠ»Π°Π΄Ρ ΡΡΠ·Π½Ρ ΠΊΡΠ»ΡΠΊΡΡΡΡ ΠΌΠΎΠ΄ΠΈΡΡΠΊΠΎΠ²Π°Π½ΠΈΡ
Π»Π°Π½ΠΎΠΊ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΠΎ Π²ΡΡ ΠΎΡΡΠΈΠΌΠ°Π½Ρ ΠΠΠ ΠΏΡΠΈΠ³Π½ΡΡΡΡΡΡ Π°ΠΊΡΠΈΠ²Π½ΡΡΡΡ ΡΠΈΡΡΠ΅ΠΌΠΈ ΠΡΠ½ in vitro. ΠΠ±ΡΠ°Π½Π° ΠΠΠ-ΡΡΡΡΠΊΡΡΡΠ°, ΡΠΊΠ° ΠΏΡΠΈΠ³Π½ΡΡΡΡ NER Π½Π°ΠΉΠ±ΡΠ»ΡΡ Π²ΠΈΡΠΎΠΊΠΎΡ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΡΡΡΡ. ΠΠΈΡΠ½ΠΎΠ²ΠΊΠΈ. ΠΠΎΠ΄Π΅Π»ΡΠ½Ρ ΠΠΠ Π· Π½Π΅ΡΠ΅ΠΏΠ°ΡΠΎΠ²Π°Π½ΠΈΠΌΠΈ ΡΡΠΊΠΎΠ΄ΠΆΠ΅Π½Π½ΡΠΌΠΈ, Π·Π΄Π°ΡΠ½Ρ Π²ΠΈΡΠΎΠΊΠΎΡ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΡΡΡΡ ΠΏΡΠΈΠ³Π½ΡΡΡΠ²Π°ΡΠΈ NER, ΠΌΠΎΠΆΡΡΡ ΡΠΎΠ·Π³Π»ΡΠ΄Π°ΡΠΈΡΡ Π² ΡΠΊΠΎΡΡΡ ΡΠ½Π³ΡΠ±ΡΡΠΎΡΡΠ² ΡΠΈΡΡΠ΅ΠΌΠΈ ΠΡΠ½. ΠΠΈΡΠ²Π»Π΅Π½Ρ Π² Π΄Π°Π½ΡΠΉ ΡΠΎΠ±ΠΎΡΡ Π·Π°ΠΊΠΎΠ½ΠΎΠΌΡΡΠ½ΠΎΡΡΡ ΠΏΠΎΡΠ΅Π½ΡΡΠΉΠ½ΠΎ ΠΌΠΎΠΆΡΡΡ Π±ΡΡΠΈ Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Ρ Π΄Π»Ρ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π½Ρ ΡΠΊ ΡΡΠ½Π΄Π°ΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΈΡ
, ΡΠ°ΠΊ Ρ ΠΏΡΠΈΠΊΠ»Π°Π΄Π½ΠΈΡ
Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Ρ.Π Π½Π°ΡΠΈΡ
ΠΏΡΠ΅Π΄ΡΠ΄ΡΡΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡΡ
Π±ΡΠ»ΠΎ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΠΠ Ρ ΠΎΠ±ΡΠ΅ΠΌΠ½ΡΠΌ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄Π½ΡΠΌ Fap-dC ΡΠ²Π»ΡΠ΅ΡΡΡ ΡΡΡΠ΄Π½ΠΎΡΠ΅ΠΏΠ°ΡΠΈΡΡΠ΅ΠΌΡΠΌ ΡΡΠ±ΡΡΡΠ°ΡΠΎΠΌ Π΄Π»Ρ ΡΠΈΡΡΠ΅ΠΌΡ ΡΠΊΡΡΠΈΠ·ΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠ΅ΠΏΠ°ΡΠ°ΡΠΈΠΈ Π½ΡΠΊΠ»Π΅ΠΎΡΠΈΠ΄ΠΎΠ² (ΠΠ Π). Π‘ΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΡ ΡΠ°ΠΊΠΎΠ³ΠΎ ΡΠΈΠΏΠ° ΠΌΠΎΠ³ΡΡ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»ΡΡΡ ΠΎΡΠΎΠ±ΡΠΉ ΠΈΠ½ΡΠ΅ΡΠ΅Ρ ΠΊΠ°ΠΊ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΡΠ΅ ΡΠ΅Π»Π΅ΠΊΡΠΈΠ²Π½ΡΠ΅ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΠΎΡΡ ΡΠΈΡΡΠ΅ΠΌΡ ΠΠ Π, Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ ΡΠ½ΠΈΠΆΠ°Ρ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠ΅ΠΏΠ°ΡΠ°ΡΠΈΠΈ ΠΠΠ ΠΏΡΡΠ΅ΠΌ ΡΠ²ΡΠ·ΡΠ²Π°Π½ΠΈΡ Π±Π΅Π»ΠΊΠΎΠ²ΡΡ
ΡΠ°ΠΊΡΠΎΡΠΎΠ², Π²ΠΎΠ²Π»Π΅ΡΠ΅Π½Π½ΡΡ
Π² ΡΡΠΎΡ ΠΏΡΠΎΡΠ΅ΡΡ. ΠΡΠΎΡ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ ΠΌΠΎΠΆΠ΅Ρ Π±ΡΡΡ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎ ΠΏΠΎΠ»Π΅Π·Π΅Π½ Π΄Π»Ρ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ Ρ
ΠΈΠΌΠΈΠΎΡΠ΅ΡΠ°ΠΏΠΈΠΈ. Π¦Π΅Π»Ρ.Π’Π΅ΠΊΡΡΠ΅Π΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΎ Π½Π° ΠΏΠΎΠΈΡΠΊ ΠΠΠ-ΡΡΡΡΠΊΡΡΡ, ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΡ
ΠΌΠ½ΠΎΠΆΠ΅ΡΡΠ²Π΅Π½Π½ΡΠ΅ ΠΎΠ±ΡΠ΅ΠΌΠ½ΡΠ΅ Π°Π΄Π΄ΡΠΊΡΡ, ΠΊΠΎΡΠΎΡΡΠ΅ Ρ Π½Π°ΠΈΠ±ΠΎΠ»ΡΡΠ΅ΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡΡ ΠΌΠΎΠ³ΡΡ ΠΏΠΎΠ΄Π°Π²Π»ΡΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠΈΡΡΠ΅ΠΌΡ. ΠΠ΅ΡΠΎΠ΄Ρ. Π€Π΅ΡΠΌΠ΅Π½ΡΠ°ΡΠΈΠ²Π½ΡΠΉ ΡΠΈΠ½ΡΠ΅Π· ΠΠΠ, ΠΠ¦Π , ΠΏΡΠΈΠ³ΠΎΡΠΎΠ²Π»Π΅Π½ΠΈΠ΅ ΠΠ Π-ΠΊΠΎΠΌΠΏΠ΅ΡΠ΅Π½ΡΠ½ΡΡ
ΠΊΠ»Π΅ΡΠΎΡΠ½ΡΡ
ΡΠΊΡΡΡΠ°ΠΊΡΠΎΠ², ΡΠ΅Π°ΠΊΡΠΈΡ Π²ΡΡΠ΅Π·Π°Π½ΠΈΡ, ΠΊΠ°ΡΠ°Π»ΠΈΠ·ΠΈΡΡΠ΅ΠΌΠ°Ρ Π±Π΅Π»ΠΊΠ°ΠΌΠΈ ΠΠ Π in vitro, ΠΠΠΠ₯. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΡΠΎΠ²Π΅Π΄Π΅Π½ ΠΏΠΎΠ΄Π±ΠΎΡ ΡΡΠ»ΠΎΠ²ΠΈΠΉ ΡΠΈΠ½ΡΠ΅Π·Π° ΠΏΡΠΎΡΡΠΆΠ΅Π½Π½ΡΡ
ΠΌΠΎΠ΄Π΅Π»ΡΠ½ΡΡ
ΠΠΠ Ρ ΠΌΠ½ΠΎΠΆΠ΅ΡΡΠ²Π΅Π½Π½ΡΠΌ Π²ΠΊΠ»ΡΡΠ΅Π½ΠΈΠ΅ΠΌ Π½Π΅ΡΠ΅ΠΏΠ°ΡΠΈΡΡΠ΅ΠΌΠΎΠ³ΠΎ ΠΏΠΎΠ²ΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΡ Fap-dC. ΠΠΎΠ»ΡΡΠ΅Π½ ΡΡΠ΄ ΠΠΠ-ΡΡΡΡΠΊΡΡΡ, ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΠΉ Π² ΡΠ²ΠΎΠ΅ΠΌ ΡΠΎΡΡΠ°Π²Π΅ ΡΠ°Π·Π»ΠΈΡΠ½ΠΎΠ΅ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²ΠΎ ΠΌΠΎΠ΄ΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
Π·Π²Π΅Π½ΡΠ΅Π². ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π²ΡΠ΅ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΠΠΠ ΠΏΠΎΠ΄Π°Π²Π»ΡΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠΈΡΡΠ΅ΠΌΡ ΠΠ Π in vitro. ΠΡΠ±ΡΠ°Π½Π° ΠΠΠ-ΡΡΡΡΠΊΡΡΡΠ°, ΠΊΠΎΡΠΎΡΠ°Ρ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΡΠ΅Ρ NER Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ Π²ΡΡΠΎΠΊΠΎΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡΡ. ΠΡΠ²ΠΎΠ΄Ρ. ΠΠΎΠ΄Π΅Π»ΡΠ½ΡΠ΅ ΠΠΠ Ρ Π½Π΅ΡΠ΅ΠΏΠ°ΡΠΈΡΡΠ΅ΠΌΡΠΌΠΈ ΠΏΠΎΠ²ΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΡΠΌΠΈ, ΡΠΏΠΎΡΠΎΠ±Π½ΡΠ΅ Π²ΡΡΠΎΠΊΠΎΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡΡ ΠΏΠΎΠ΄Π°Π²Π»ΡΡΡ NER, ΠΌΠΎΠ³ΡΡ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡΡΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΠΎΡΠΎΠ² ΡΠΈΡΡΠ΅ΠΌΡ ΠΠ Π. ΠΠ±Π½Π°ΡΡΠΆΠ΅Π½Π½ΡΠ΅ Π² Π½Π°ΡΡΠΎΡΡΠ΅ΠΉ ΡΠ°Π±ΠΎΡΠ΅ Π·Π°ΠΊΠΎΠ½ΠΎΠΌΠ΅ΡΠ½ΠΎΡΡΠΈ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ Π΄Π»Ρ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ Π½Π΅ ΡΠΎΠ»ΡΠΊΠΎ ΡΡΠ½Π΄Π°ΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
, Π½ΠΎ ΠΈ ΠΏΡΠΈΠΊΠ»Π°Π΄Π½ΡΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ
ΠΡΠ΅Π½ΠΊΠ° ΡΠ²ΠΎΠΉΡΡΠ² ΠΊΠΎΡΡΠ½ΠΎΠ·Π°ΠΌΠ΅ΡΠ°ΡΡΠΈΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΠΎΠ»ΠΈΡΡΠΈΠ»Π΅Π½Π³Π»ΠΈΠΊΠΎΠ»Ρ Π΄ΠΈΠ°ΠΊΡΠΈΠ»Π°ΡΠ° ΠΈ ΠΎΠΊΡΠ°ΠΊΠ°Π»ΡΡΠΈΠ΅Π²ΠΎΠ³ΠΎ ΡΠΎΡΡΠ°ΡΠ° Π½Π° ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΌΠΎΠ½ΠΎΠΊΠΎΡΡΠΈΠΊΠ°Π»ΡΠ½ΠΎΠ³ΠΎ Π΄ΠΈΠ°ΡΠΈΠ·Π°ΡΠ½ΠΎΠ³ΠΎ Π΄Π΅ΡΠ΅ΠΊΡΠ° Π±Π΅Π΄ΡΠ΅Π½Π½ΠΎΠΉ ΠΊΠΎΡΡΠΈ ΠΊΡΡΡΡ: ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΎΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅
Background. The problem of bone defects replacement is relevant nowadays, that is why many scientists create new synthetic bone substitutes, but the ideal material has not been found so far.
The aims of the study: 1) to determine the suitability of the monocortical defect model in the rat femur diaphysis with additional prophylactic reinforcement with a bone plate for assessing the biological properties of implanted materials using the commercially available ChronOS material as an example; 2) to assess of the osteoconductive properties of composite materials based on poly(ethylene glycol)diacrylate and octacalcium phosphate with architecture Kelvin and gyroid types on the developed model.
Methods. A prospective study, level of evidence II. A monocortical defect of the rat femoral diaphysis (length 7 mm) was produced under anaesthesia in aseptic conditions and fixed with a polyetheretherketone plate and six titanium screws. In the control group, the defect was left empty. In other groups, blocks of one of three materials were implanted ΡhronOS and composites of poly(ethylene glycol)diacrylate and octacalcium phosphate with 3D-printed Kelvin and gyroid architectures. After 3 and 6 weeks, the rats were sacrificed, and histological examination of the defect zone was performed. The amount of newly formed bone tissue was histometricly assessed, followed by statistical processing of the results.
Results. All rats have reached the planned endpoint, and there were no infectious complications or loss of fixation. Histological examination of the defect zone revealed minimal bone growth in the Control group, rather slow bone formation in the Gyroid group, and statistically significantly more pronounced bone formation in the pores of the materials in the Kelvin and Chronos groups.
Conclusions. Bone defect in this model was not spontaneously filled with bone tissue and allowed us to study the biological properties of bone substitutes (the ability to biodegrade and osteoconductive properties). The osteoconductive properties of a composite material based on poly(ethylene glycol)diacrylate and octacalcium phosphate with a Kelvin architecture are higher than with a gyroid architecture and are comparable to that of the ΡhronOS.ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ. ΠΡΠΎΠ±Π»Π΅ΠΌΠ° Π·Π°ΠΌΠ΅ΡΠ΅Π½ΠΈΡ Π΄Π΅ΡΠ΅ΠΊΡΠΎΠ² ΠΊΠΎΡΡΠΈ Π°ΠΊΡΡΠ°Π»ΡΠ½Π° Π² Π½Π°ΡΡΠΎΡΡΠ΅Π΅ Π²ΡΠ΅ΠΌΡ, ΠΏΠΎΡΡΠΎΡΠ½Π½ΠΎ Π²Π΅Π΄ΡΡΡΡ ΠΏΠΎΠΈΡΠΊΠΈ Π½ΠΎΠ²ΡΡ
ΡΠΈΠ½ΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΊΠΎΡΡΠ½ΠΎΠ·Π°ΠΌΠ΅ΡΠ°ΡΡΠΈΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ², ΠΎΠ΄Π½Π°ΠΊΠΎ ΠΈΠ΄Π΅Π°Π»ΡΠ½ΡΠΉ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π» Π½Π΅ Π½Π°ΠΉΠ΄Π΅Π½ Π΄ΠΎ ΡΠΈΡ
ΠΏΠΎΡ.
Π¦Π΅Π»ΠΈ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ: 1) ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΠΏΡΠΈΠ³ΠΎΠ΄Π½ΠΎΡΡΠΈ ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΌΠΎΠ½ΠΎΠΊΠΎΡΡΠΈΠΊΠ°Π»ΡΠ½ΠΎΠ³ΠΎ Π΄Π΅ΡΠ΅ΠΊΡΠ° Π΄ΠΈΠ°ΡΠΈΠ·Π° Π±Π΅Π΄ΡΠ΅Π½Π½ΠΎΠΉ ΠΊΠΎΡΡΠΈ ΠΊΡΡΡΡ Ρ Π΄ΠΎΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΡΠΌ ΠΏΡΠΎΡΠΈΠ»Π°ΠΊΡΠΈΡΠ΅ΡΠΊΠΈΠΌ Π°ΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΏΡΠΈ ΠΏΠΎΠΌΠΎΡΠΈ Π½Π°ΠΊΠΎΡΡΠ½ΠΎΠΉ ΠΏΠ»Π°ΡΡΠΈΠ½Ρ Π΄Π»Ρ ΠΎΡΠ΅Π½ΠΊΠΈ Π±ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ²ΠΎΠΉΡΡΠ² ΠΈΠΌΠΏΠ»Π°Π½ΡΠΈΡΡΠ΅ΠΌΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² Π½Π° ΠΏΡΠΈΠΌΠ΅ΡΠ΅ ΠΊΠΎΠΌΠΌΠ΅ΡΡΠ΅ΡΠΊΠΈ Π΄ΠΎΡΡΡΠΏΠ½ΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° ΡhronOS; 2) ΠΎΡΠ΅Π½ΠΊΠ° ΠΎΡΡΠ΅ΠΎΠΊΠΎΠ½Π΄ΡΠΊΡΠΈΠ²Π½ΡΡ
ΡΠ²ΠΎΠΉΡΡΠ² ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠ½ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΠΎΠ»ΠΈΡΡΠΈΠ»Π΅Π½Π³Π»ΠΈΠΊΠΎΠ»Ρ Π΄ΠΈΠ°ΠΊΡΠΈΠ»Π°ΡΠ° ΠΈ ΠΎΠΊΡΠ°ΠΊΠ°Π»ΡΡΠΈΠ΅Π²ΠΎΠ³ΠΎ ΡΠΎΡΡΠ°ΡΠ° Ρ Π°ΡΡ
ΠΈΡΠ΅ΠΊΡΡΡΠΎΠΉ ΠΠ΅Π»ΡΠ²ΠΈΠ½Π° ΠΈ ΡΠΈΠΏΠ° Π³ΠΈΡΠΎΠΈΠ΄ Π½Π° ΡΠ°Π·ΡΠ°Π±ΠΎΡΠ°Π½Π½ΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ.
ΠΠ°ΡΠ΅ΡΠΈΠ°Π» ΠΈ ΠΌΠ΅ΡΠΎΠ΄Ρ. ΠΠΎΠ½ΠΎΠΊΠΎΡΡΠΈΠΊΠ°Π»ΡΠ½ΡΠΉ Π΄Π΅ΡΠ΅ΠΊΡ Π΄ΠΈΠ°ΡΠΈΠ·Π° Π±Π΅Π΄ΡΠ΅Π½Π½ΠΎΠΉ ΠΊΠΎΡΡΠΈ ΠΊΡΡΡ ΡΠ°Π·ΠΌΠ΅ΡΠΎΠΌ 7 ΠΌΠΌ Π² Π΄Π»ΠΈΠ½Ρ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΠ»ΠΈ ΠΏΠΎΠ΄ Π½Π°ΡΠΊΠΎΠ·ΠΎΠΌ Π² Π°ΡΠ΅ΠΏΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΈ ΡΠΈΠΊΡΠΈΡΠΎΠ²Π°Π»ΠΈ ΠΏΠΎΠ»ΠΈΡΡΠΈΡΡΡΠΈΡΠΊΠ΅ΡΠΎΠ½ΠΎΠ²ΠΎΠΉ ΠΏΠ»Π°ΡΡΠΈΠ½ΠΎΠΉ ΠΈ ΡΠ΅ΡΡΡΡ ΡΠΈΡΠ°Π½ΠΎΠ²ΡΠΌΠΈ Π²ΠΈΠ½ΡΠ°ΠΌΠΈ. ΠΡΡΡ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»ΡΠ»ΠΈ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΠΌ ΠΎΠ±ΡΠ°Π·ΠΎΠΌ Π½Π° ΡΠ΅ΡΡΡΠ΅ Π³ΡΡΠΏΠΏΡ ΠΏΠΎ 12 ΠΎΡΠΎΠ±Π΅ΠΉ Π² ΠΊΠ°ΠΆΠ΄ΠΎΠΉ. Π Π³ΡΡΠΏΠΏΠ΅ ΠΠΎΠ½ΡΡΠΎΠ»Ρ Ρ ΠΆΠΈΠ²ΠΎΡΠ½ΡΡ
ΠΊΠΎΡΡΠ½ΡΠΉ Π΄Π΅ΡΠ΅ΠΊΡ Π½Π΅ Π·Π°ΠΏΠΎΠ»Π½ΡΠ»ΠΈ. Π£ ΠΆΠΈΠ²ΠΎΡΠ½ΡΡ
Π² Π³ΡΡΠΏΠΏΠ΅ Π₯ΡΠΎΠ½ΠΎΡ Π΄Π΅ΡΠ΅ΠΊΡ Π·Π°ΠΏΠΎΠ»Π½ΡΠ»ΠΈ ΠΏΠΎΠ΄Π³ΠΎΡΠΎΠ²Π»Π΅Π½Π½ΡΠΌ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠΌ chronOS Π² Π²ΠΈΠ΄Π΅ ΠΏΠΎΠ»ΡΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π±Π»ΠΎΠΊΠ°, Π² Π³ΡΡΠΏΠΏΠ΅ ΠΠ΅Π»ΡΠ²ΠΈΠ½ ΠΈΡΡΠ»Π΅Π΄ΡΠ΅ΠΌΡΠΌ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠΌ Ρ Π°ΡΡ
ΠΈΡΠ΅ΠΊΡΡΡΠΎΠΉ ΠΠ΅Π»ΡΠ²ΠΈΠ½Π°, Π² Π³ΡΡΠΏΠΏΠ΅ ΠΠΈΡΠΎΠΈΠ΄ ΠΈΡΡΠ»Π΅Π΄ΡΠ΅ΠΌΡΠΌ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠΌ Ρ Π°ΡΡ
ΠΈΡΠ΅ΠΊΡΡΡΠΎΠΉ ΡΠΈΠΏΠ° Π³ΠΈΡΠΎΠΈΠ΄. Π§Π΅ΡΠ΅Π· 3 ΠΈ 6 Π½Π΅Π΄. ΠΊΡΡΡ Π²ΡΠ²ΠΎΠ΄ΠΈΠ»ΠΈ ΠΈΠ· ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ° ΠΈ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΠ»ΠΈ Π³ΠΈΡΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π·ΠΎΠ½Ρ Π΄Π΅ΡΠ΅ΠΊΡΠ°. ΠΠ°ΡΠ΅ΠΌ Π²ΡΠΏΠΎΠ»Π½ΡΠ»ΠΈ Π³ΠΈΡΡΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΡΡ ΠΎΡΠ΅Π½ΠΊΡ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π° Π½ΠΎΠ²ΠΎΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½Π½ΠΎΠΉ ΠΊΠΎΡΡΠ½ΠΎΠΉ ΡΠΊΠ°Π½ΠΈ Ρ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΡΠ΅ΠΉ ΡΡΠ°ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΎΠΉ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΎΠ².
Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. Π Ρ
ΠΎΠ΄Π΅ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ° Π²ΡΠ΅ ΠΆΠΈΠ²ΠΎΡΠ½ΡΠ΅ Π΄ΠΎΡΡΠΈΠ³Π»ΠΈ ΠΏΠ»Π°Π½ΠΈΡΡΠ΅ΠΌΠΎΠΉ ΠΊΠΎΠ½Π΅ΡΠ½ΠΎΠΉ ΡΠΎΡΠΊΠΈ, ΠΈΠ½ΡΠ΅ΠΊΡΠΈΠΎΠ½Π½ΡΠ΅ ΠΎΡΠ»ΠΎΠΆΠ½Π΅Π½ΠΈΡ ΠΈ ΠΏΠΎΡΠ΅ΡΡ ΡΠΈΠΊΡΠ°ΡΠΈΠΈ Π·Π°ΡΠΈΠΊΡΠΈΡΠΎΠ²Π°Π½Ρ Π½Π΅ Π±ΡΠ»ΠΈ. ΠΡΠΈ Π³ΠΈΡΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠΌ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΈ Π·ΠΎΠ½Ρ Π΄Π΅ΡΠ΅ΠΊΡΠ° Π²ΡΡΠ²Π»Π΅Π½ ΠΌΠΈΠ½ΠΈΠΌΠ°Π»ΡΠ½ΡΠΉ ΡΠΎΡΡ ΠΊΠΎΡΡΠΈ Π² Π³ΡΡΠΏΠΏΠ΅ ΠΠΎΠ½ΡΡΠΎΠ»Ρ, Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ ΠΌΠ΅Π΄Π»Π΅Π½Π½ΠΎΠ΅ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΊΠΎΡΡΠΈ Π² ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π΅ Π³ΡΡΠΏΠΏΡ ΠΠΈΡΠΎΠΈΠ΄ ΠΈ ΡΡΠ°ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈ Π·Π½Π°ΡΠΈΠΌΠΎ Π±ΠΎΠ»Π΅Π΅ Π²ΡΡΠ°ΠΆΠ΅Π½Π½ΠΎΠ΅ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΊΠΎΡΡΠ½ΠΎΠΉ ΡΠΊΠ°Π½ΠΈ Π² ΠΏΠΎΡΠ°Ρ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² Π² Π³ΡΡΠΏΠΏΠ°Ρ
ΠΠ΅Π»ΡΠ²ΠΈΠ½ ΠΈ Π₯ΡΠΎΠ½ΠΎΡ.
ΠΠ°ΠΊΠ»ΡΡΠ΅Π½ΠΈΠ΅. Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½Π½Π°Ρ ΠΌΠΎΠ΄Π΅Π»Ρ Π΄Π΅ΡΠ΅ΠΊΡΠ° ΠΊΠΎΡΡΠΈ ΡΠΏΠΎΠ½ΡΠ°Π½Π½ΠΎ Π½Π΅ Π·Π°ΠΏΠΎΠ»Π½ΡΠ΅ΡΡΡ ΠΊΠΎΡΡΠ½ΠΎΠΉ ΡΠΊΠ°Π½ΡΡ ΠΈ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ Π±ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ²ΠΎΠΉΡΡΠ² ΠΊΠΎΡΡΠ½ΠΎΠΏΠ»Π°ΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² (ΡΠΏΠΎΡΠΎΠ±Π½ΠΎΡΡΡ ΠΊ Π±ΠΈΠΎΠ΄Π΅Π³ΡΠ°Π΄Π°ΡΠΈΠΈ ΠΈ ΠΎΡΡΠ΅ΠΎΠΊΠΎΠ½Π΄ΡΠΊΡΠΈΠ²Π½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π°). ΠΡΡΠ΅ΠΎΠΊΠΎΠ½Π΄ΡΠΊΡΠΈΠ²Π½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΠΎΠ»ΠΈΡΡΠΈΠ»Π΅Π½Π³Π»ΠΈΠΊΠΎΠ»Ρ Π΄ΠΈΠ°ΠΊΡΠΈΠ»Π°ΡΠ° ΠΈ ΠΎΠΊΡΠ°ΠΊΠ°Π»ΡΡΠΈΠ΅Π²ΠΎΠ³ΠΎ ΡΠΎΡΡΠ°ΡΠ° Ρ Π°ΡΡ
ΠΈΡΠ΅ΠΊΡΡΡΠΎΠΉ ΠΠ΅Π»ΡΠ²ΠΈΠ½Π° Π²ΡΡΠ΅, ΡΠ΅ΠΌ Ρ Π°ΡΡ
ΠΈΡΠ΅ΠΊΡΡΡΠΎΠΉ ΡΠΈΠΏΠ° Π³ΠΈΡΠΎΠΈΠ΄, ΠΈ ΡΠΎΠΏΠΎΡΡΠ°Π²ΠΈΠΌΡ Ρ ΡΠ°ΠΊΠΎΠ²ΡΠΌΠΈ Ρ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° ΡhronOS
Confirmation of the Double Charm Baryon Xi_cc+ via its Decay to p D+ K-
We observes a signal for the double charm baryon Xi_cc+ in the charged decay
mode Xi_cc+ -> p D+ K- to complement the previously reported decay Xi_cc+ ->
Lambda_c K- pi+ in data from SELEX, the charm hadro-production experiment
(E781) at Fermilab. In this new decay mode we observe an excess of 5.62 events
over an expected background estimated by event mixing to be 1.38+/-0.13 events.
The Poisson probability that a background fluctuation can produce the apparent
signal is less than 6.4E-4. The observed mass of this state is
(3518+/-3)MeV/c^2, consistent with the published result. Averaging the two
results gives a mass of (3518.7+/-1.7)MeV/c^2. The observation of this new weak
decay mode confirms the previous SELEX suggestion that this state is a double
charm baryon. The relative branching ratio Gamma(Xi_cc+ -> pD+K-)/Gamma(Xi_cc+
-> Lambda_c K- pi+) = 0.36+/-0.21.Comment: 11 pages, 6 included eps figures. v2 includes improved statistical
method to determine significance of observation. Submitted to PL
Production Asymmetry Measurement of High Xt Hadrons in pp Collisions at 40 GeV
Single-spin asymmetries for hadrons have been measured in collisions of
transversely-polarized 40 GeV/c proton beam with an unpolarized liquid hydrogen
target. The asymmetries were measured for pi+-, K+-, protons and antiprotons,
produced in the central region (0.02 < Xf < 0.10 and 0.7 < Pt < 3.4 GeV/c).
Asymmetries for pi+-, K+- and antiprotons show within measurement errors the
linear dependence on Xt and change a sign near 0.37. For protons negative
asymmetry, independent of Xt has been found. The results are compared with
those of other experiments and SU(6) model predictions.Comment: 25 pages (Latex), 12 Postscript figure
Measurement of the Ds lifetime
We report precise measurement of the Ds meson lifetime. The data were taken
by the SELEX experiment (E781) spectrometer using 600 GeV/c Sigma-, pi- and p
beams. The measurement has been done using 918 reconstructed Ds. The lifetime
of the Ds is measured to be 472.5 +- 17.2 +- 6.6 fs, using K*(892)0K+- and phi
pi+- decay modes. The lifetime ratio of Ds to D0 is 1.145+-0.049.Comment: 5 pages, 2 figures submitted to Phys. Lett.
Evidence of Color Coherence Effects in W+jets Events from ppbar Collisions at sqrt(s) = 1.8 TeV
We report the results of a study of color coherence effects in ppbar
collisions based on data collected by the D0 detector during the 1994-1995 run
of the Fermilab Tevatron Collider, at a center of mass energy sqrt(s) = 1.8
TeV. Initial-to-final state color interference effects are studied by examining
particle distribution patterns in events with a W boson and at least one jet.
The data are compared to Monte Carlo simulations with different color coherence
implementations and to an analytic modified-leading-logarithm perturbative
calculation based on the local parton-hadron duality hypothesis.Comment: 13 pages, 6 figures. Submitted to Physics Letters
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