Judul: Dinamika Transfer Energi Pada Protein α-Heliks Berdasarkan Ansatz I Model Davydov Dengan Variasi Kopling Antar Peptida
Abstrak: A basic problem of many biological processes at biomolecular level is mechanism of transfer of bioenergy released by ATP hydrolysis in protein. Davydov’sModel is a model that could describe that mechanism. The Davydov’s model adopted in this research use ansatz as trial function with the variation of dipole-dipole coupling between nearest unit of peptides in the form of a constant function, gaussian function, gradient-line function. We found three dynamical cases that are travelling soliton, bending soliton and breathing soliton. The dynamics are related to the energy transfer in the protein and deflection of soliton that can be controlled by strength of dipole-dipole coupling (Jn), coupling of exciton-phonon ( χ ), and initial condition.
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Judul: Dinamika Pindahan Energi dalam Protein Alfa Heliks pada Suhu Fisiologis dengan Model Davydov
Abstrak: ATP hydrolysis energy transfer process always involve in biological phenomena such as active transport, mechanical work and biosynthetic reactions. Davydov models used the solid theory with a weakness, the soliton only formed at 0K and for certain parameters. In this research was reviewed the effect of variation in terms of temperature, hydrogen bond spring constant, and excitonphonon interaction constants of the energy dynamics of solitons and nonlinear equations of motion determine the quantum review to explain the dynamics of the energy. Energy equation derived from the the Euler-Lagrange equations of motion with Hamiltonian system. Then numerical analysis methods performed with the fourth-order Runga Kutta using MATLAB R2008b. Variations of temperatures and constant of exciton-phonon interaction affects the the flow of energy soliton. Variations of spring constants of hydrogen bonding affects the energy soliton localization.
Keyword: temperature, soliton, Davydov, ansatz I, Alpha helix

Judul: Prevalence of Bird Lice on Rock Pigeon (Columba livia) in 99Wonderland Park, Selangor, Malaysia
Abstrak: Rock Pigeon (Columba livia) have coexisted with humans for thousands of years and are used for various purposes such as food and in sports. Rock pigeons may have the potential to be infested with a wide range of ectoparasites, which can have a significant impact on their life cycle. This study aims to measure the prevalence of Columba livia with bird lice in 99Wonderland Park, Selangor, Malaysia in the year 2020 and to ascertain the impact of bird lice on the health of these infested birds. Data were collected from clinical records for the month of January to December in the year 2020 from 99Wonderland Park, Selangor, Malaysia. Lice were identified in 42 of the 80 Rock pigeons examined so, the overall prevalence of lice infestations was 52.5%. The prevalence of ectoparasites was found to be higher in young Rock pigeons (60.4%) as compared to adult Rock pigeons (37.4%). Columbicola columbae (wing lice) and Colpocephalum turbinatum (body lice) are two species of lice that have been detected. Body lice were more prevalent in young Columba livia birds at 47.6% whereas wing lice were more prevalent in adult Columba livia birds at 16.7%. Most of the lice were found in the thorax and abdomen area followed by the head and neck area., Merpati Batu (Columba livia) telah hidup berdampingan dengan manusia selama ribuan tahun dan digunakan untuk berbagai keperluan seperti makanan dan olahraga. Merpati batu dapat terinfestasi dengan berbagai ektoparasit, yang dapat berdampak signifikan pada siklus hidup mereka. Penelitian ini bertujuan untuk mengetahui prevalensi Columba livia dengan kutu burung di 99 Wonderland Park, Selangor, Malaysia pada tahun 2020 dan untuk memastikan dampaknya terhadap kesehatan burung yang terinfestasi. Data dikumpulkan dari catatan klinis dari bulan Januari hingga Desember tahun 2020 dari 99Wonderland Park, Selangor, Malaysia. Kutu diidentifikasi pada 42 dari 80 merpati batu yang diperiksa sehingga, prevalensi keseluruhan infestasi kutu adalah 52,5%. Prevalensi ektoparasit ditemukan lebih tinggi pada merpati batu muda (60,4%) dibandingkan dengan merpati batu dewasa (37,4%). Columbicola columbae (kutu sayap) dan Colpocephalum turbinatum (kutu badan) adalah dua spesies kutu yang telah ditemukan. Kutu badan lebih banyak ditemukan pada burung Columba livia muda sebesar 47,6% sedangkan kutu sayap lebih banyak ditemukan pada burung Columba livia dewasa sebesar 16,7%. Sebagian besar kutu ditemukan di daerah dada dan abdomen diikuti daerah kepala dan leher.
Keyword: Columba livia, prevalence, ectoparasite, wing lice, body lice, Columba livia, prevalensi, ektoparasit, kutu sayap, kutu badan