Judul: Analisis Regresi dan Korelasi Longissimus Dorsi Secara Invasif dan Non-Invasif Pada Sapi Bali
Abstrak: Sapi bali merupakan sapi asli Indonesia yang memiliki potensi sebagai penghasil daging berkualitas. Metode non-invasif adalah metode yang digunakan untuk menduga karakteristik sifat kualitas karkas pada sapi bali khususnya Longissimus dorsi (L. dorsi). Tujuan dari penelitian ini yaitu menganalisis regresi dan korelasi kualitas L. dorsi pada sapi bali secara invasif dan non-invasif. Data sapi bali yang digunakan sebanyak 46 ekor dengan umur 2,0-3,5 tahun. Metode invasif yaitu ternak dipotong dan metode non-invasif menggunakan citra ultrasonografi untuk mendapatkan sifat L. dorsi. Data yang diperoleh dianalisis secara deskriptif dan dilanjutkan dengan analisis regresi dan korelasi. Persamaan regresi diperoleh secara longitudinal (Y= 2,791 + 0,623X), transversal (Y= 3,586 +0,481X), dan gabungan (Y= 2,552 + 0,683X). Adapun nilai korelasi L. dorsiantara invasif dan non-invasif nyata (P<0,05) erat positif yaitu longitudinal (0,547),transversal (0,420), dan gabungan (0,538) pada sapi bali. Citra ultrasonografi dapatdigunakan untuk menduga sifat L. dorsi secara non-invasif., Bali cattle are native Indonesian cattle that have the potential to produce quality meat. The non-invasive method is a method used to predict the characteristics of carcass quality in Bali cattle, especially Longissimus dorsi (L. dorsi). The purpose of this study was to analyze the regression and quality correlation of L. dorsi in bali cattle invasively and non-invasively. Bali cattle data used as many as 46 heads with the age of 2.0-3.5 years. Invasive methods, namely cutting and non-invasive methods using ultrasonographic images to obtain the properties of L. dorsi. The data obtained were analyzed descriptively and continued with regression and correlation analysis. Regression equations were obtained longitudinally (Y= 2.791 + 0.623X), transversely (Y= 3.586 + 0.481X), and combined (Y= 2.552 + 0.683X). The correlation value of L. dorsi between invasive and non-invasive was significantly positive (P<0.05) and was closely positive, namely longitudinal (0.547), transverse (0.420), and combined (0.538) in Bali cattle. Ultrasonographic images can be used to predict the nature of L. dorsi non-invasively.
Keyword: Bali Cattle, Carcass Quality, Ultrasound Imaging

Judul: Pendugaan Skor Marbling dan Lemak Intramuskular Sapi Bali (Bos javanicus) Hasil Citra Ultrasonografi Berdasarkan Bobot Badan
Abstrak: Penelitian Ini bertujuan menganalisis pendugaan skor marbling dan lemak intramuskular sapi bali (Bos javanicus) hasil citra ultrasonografi berdasarkan bobot badan. Sebanyak 52 ekor sapi bali jantan digunakan yang dipelihara secara intensif dan ekstensif di Balai Pembibitan Ternak Unggul dan Hijauan Pakan Ternak (BPTU-HPT) Denpasar, Bali. Pendugaan skor marbling (SM) dan lemak intramuskular (LIM) hasil citra ultrasonografi dianalisis menggunakan imageJ. Metode pendugaan skor marbling, lemak intramuskular, dan korelasi bobot badan menggunakan model persamaan regresi, korelasi, dan nilai determinasi (R2). Persamaan regresi linear sederhana skor marbling terhadap bobot badan diperoleh pada Longgissimus dorsi transversal dan Longgissimus dorsi longitudinal sebagai berikut Y= -0.07 + 0.00720 X, Y= 0.53 + 0.00536 X transversal dan longitudinal intensif dan Y= 1.60 + 0.00070 X, Y= 1.60 + 0.00035 X pada posisi transversal dan longitudinal ekstensif. Korelasi skor marbling terhadap bobot badan posisi Longgissimus dorsi transversal dan longitudinal pemeliharaan intensif dan ekstensif berturut-turut sebesar 0.28, 0.26, -0.02, dan 0.07 yang menunjukan adanya korelasi positif sedang, positif lemah, dan negatif lemah. Disimpulkan bahwa pendugaan skor marbling sapi bali berdasarkan bobot badan menggunakan model regresi dan korelasi diperoleh adanya hubungan korelasi dengan R2 hingga 0.1%.
Keyword: citra ultrasonografi, pemeliharaan intensif dan ekstensif, sapi bali, skor marbling

Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell