Judul: Pengaruh gonadotropin releasing hormon(GnRH) terhadap produktivitas, siklus bertelur dan biometri organ reproduksi serta hubungannya dengan konsentrasi progeteron serum ayam lokal(Gallus domesticus)
Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh induksi Gonadotropin Releasing Hormone (GnRH) terhadap produktivitas dan siklus bertelur ayam lokal Gallus domesticus) dan pengaruhnya terhadap konsentrasi Progesteron, jumlah folikel yang sedang tumbuh, berat ovarium, oviduk dan biometri organ reproduksi. Sebanyak 10 ekor ayam lokal betina dewasa digunakan dalam penelitian ini, dikelompokan secara acak menjadi dua kelompok yaitu kelompok GnRH 5 ekor dan kelompok kontrol sebanyak 5 ekor. Kelompok GnRH disuntik dengan GnRH 50 µg/mL sedangkan kelompok kontrol disuntik dengan I mL. NaCl 0,9% setiap hari selama 7 hari berturut-turut secara intramuskular di M. Pectoralis. Hasil penelitian ini menunjukkan adanya peningkatan produksi telur secara signifikan (P<0,05) dalam suatu periode bertelur (12 bulan) pada kelompok GnRH dari 50,60±0,75 menjadi 67,71+0,15 butir dibandingkan kelompok kontrol dari 64,92+0,30 menjadi 40,52±0,30 butir. Penyuntikan GnRH menghasilkan perbaikan pola siklus bertelur dibanding siklus normalnya yaitu dengan memperpendek masa stirahat bertelur secara signifikan (P<0,05) dalam suatu periode bertelur (12 bulan) pada kelompok GnRH dari 98,33±0,39 hari menjadi 68,00±0,81 hari sedangkan kelompok kontrol dari 84,40±0,33 hari menjadi 71,33±0,78 hari, Konsentrasi progesteron serum ayam lokal dari kelompok GnRH lebih tinggi secara signifikan (P<0,05) pada hari 1, 2, 5 dan 7 (7,63; 1,94; 3,57; 2,92 ng/mL) dibandingkan dengan kelompok kontrol (0,15; 0,01; 0,33; 0,98 ng/mL). Disamping itu pula terjadi peningkatan (P<0,05) pertumbuhan folikel (jumlah folikel F4, FS dan berat folikel pada F1, F2, F3) seiring dengan peningkatan berat ovarium secara signifikan (P<0,05) pada kelompok GnRH (37,65±1,60 gram) dibandingkan dengan kelompok kontrol (28.60±1,20 gram) dan diikuti dengan peningkatan berat oviduk secara signifikan (P<0,05) pada kelompok GnRH (50,43+0,85 gram) dibandingkan dengan kelompok kontrol (31,15±1,50 gram). Selain itu GnRH dapat meningkatkan biometri organ reproduksi secara signifikan (P<0,05) dibanding kelompok kontrol. Dari penelitian ini dapat disimpulkan bahwa respon dari penyuntikan GnRH dapat meningkatkan konsentrasi Progesteron, jumlah folikel F4, F5 dan berat folikel F1, F2, F3, meningkatkan produksi telur serta memperpendek masa istirahat dalam suatu periode bertelur. Selain itu GnRH dapat meningkatkan berat ovarium, oviduk dan biometri organ reproduksi.
Keyword: Gallus domesticus, chicken, gonadotropin-releasing hormone (GnRH)

Judul: Pengaruh Gonadotropin Releasing Hormone (GnRH) Terhadap Produktivitas, Siklus Bertelur Dan Biometri Organ Reproduksi Serta Hubungannya Dengan Konsentrasi Progesteron Serum Ayam Lokal (Gallus domesticus)
Abstrak: This experiment was conducted to study the effect of Gonadotropin Releasing Hormone (GnRH) on productivity, egg laying cycle of the domestic fowl (Gallus domesticus) and its effect on serom Progesterone concentration, number of growing follicles and weight of the ovary, oviduct and biometry of the reproductve organs. Ten rna/lire female hens were used in this research. These hens were devided randomly into the GuRH and control group consisting of five hens each. The GnRH group was injected intramuscular into the pectoral muscle with 1 mL of 50pg/mI. GnRH, while the control group was injected with 1 mL of 0,9% saline for seven conseccutive days. The results showed significant (P<0,05) elevated producth;ty in the laying period (12 months) of the GnRB group from 50,601:0,75 eggs to 67,71:1:0,15 eggs as compared to that of the control group from 64,92x1,00 eggs to 40,521:0,30 eggs. GnRH injection, improved the egg laying cycle patterns as compared to the normal egg laying cycle by decreasing the lag time in a laying period (12 months) from 98,33:1:0,39 days to 68,00:0,81 days significantly (P<0,05) while the control group from 84,40:0,33 days to 71,33:0,78 days. Serom Progesterone concentration of the GnRH group (7,63; 1,93; 3,57; 2,92 ng/mL) increased and reached its peak significantly as compared to the control group (0,15; 0,01; 0,74; 0,98 ng/mL) on day 1, 2, 5 and 7 of treatment. The number of growing follicles (the number of F4, F5 follicles; F1, F2, F3 follicles weight) also increased significantly (P<0,05) in the GnRH group as compared to the control group, concomitant with the increasing ovarian and oviduct weight (p<0,05) in the GnRH group (37, 65:1, l6; 50,43:,58 g) aS compared to the control group (28,50:1,00; 31,15:1,65 g). GnRH also increased significanly (P< 0,05) the biometry of the reproductive organs. From this research it could be concluded that responsiveness of GnRH injection could increased Progesterone concentrations, resulting ill the number of follicular growth F4, F5 and ultimately Fl, F2, F3 increased egg production and repaired egg laying cycle. GnRH also increased weight of the ovaries, oviduct alld hiomelfy of the reproductive organs.
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Judul: Tinjauan Matematis pada Model Makroskopik dan Mikroskopik Arus Lalu-lintas
Abstrak: Traffic flow phenomenon can be described through mathematical model such as continuous dynamic model with an ordinary differential equation so that it can be solved with integral factors. In this paper three simple models of traffic flow are discussed, i.e, two macroscopic and one microscopic models. Macroscopic model formulates dynamics of the traffic flow that occurs on a large number of vehicles on a road. While the microscopic model explains drivers’ behavior in their interaction with other vehicles ahead, i.e, car-following model. This paper shows the existence of ordinary differential equation found in the traffic flow model and indicates some different representations in the context of the same model. It also reviews a simple model of traffic flow along a single link, which leads to some unexpected results, i.e, it can express the solution model in term of link outflows as well as trip time. In the microscopic model, simulation is done to illustrate the behavior of the drivers with a sensitivity coefficient as a benchmark parameter.
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