Judul: Analisis Selen Dalam Susu Bubuk Menggunakan Spektrometri Emisi Atom-Plasma Gandeng Induktif dan Spektrometri Serapan Atom Nyala
Abstrak: Selenium is an essential micromineral which can be toxic in high doses. This research compared 2 methods of selenium analysis in milk powder, namely by inductively coupled plasma-atomic emission spectrometry (ICP-AES) and flame atomic absorption spectrometry (FAAS), based on the linearity, limit of detection and quantification, precision, accuracy, and robustness, and measurement of 4 milk powder samples with different brand. Both ICP-AES and FAAS methods had good linearity with coefficient of determination higher than 0.99. Limit of detection and quantification for ICP-AES were 0.444 and 1.480 μg/L, not as good as FAAS which were 0.105 and 0.350 μg/L, respectively. In the other hand, the ICP-AES method was more precise and accurate than FAAS, indicated by lower relative standard deviation value and by recovery value ranging between 80 and 110%. Robustness test showed that destruction time effected the selenium concentration measured by ICP-AES, but had no effect on FAAS measurement. Four milk powder samples showed 4‒84% difference obtained between measurement ICP-AES and FAAS. From these results, the more precise and accurate ICP-AES methods was more recommended for selenium content measurement in milk powder.
Keyword: selenium, milk powder, ICP-AES, FAAS

Judul: Near Infrared Refletance Spectrosocopy (NIRS) Qualitative Detection Based on Fatty Acid Profile of Dairy Milk
Abstrak: Penelitian ini bertujuan membuat model kalibrasi menggunakan Near Infrared Reflectance Spectroscopy (NIRS) dari susu sapi perah dengan waktu pemerahan yang berbeda. Pengambilan sampel dilakukan di peternakan rakyat yang berlokasi di tiga tempat yaitu Pangalengan, Cibungbulang, dan Kebon Pedes Jawa Barat. Komponen sampel susu dianalisis menggunakan lactoscan dan identifikasi profil asam lemaknya menggunakan gas chromatography (GC). Sampel susu dianalisis secara rapid menggunakan NIRS. Hasil analisis komponen susu dan asam lemak diolah secara statistik dengan uji normalitas dan uji-t pada SPSS ver. 25. Hasil berbeda nyata didapatkan ada tiga parameter dari susu pemerahan pagi dan sore (P<0,05) yaitu lemak susu, C8:0 dan C14:1. Hasil analisis pada NIRS menunjukkan susu pemerahan pagi dan sore memiliki spektrum serupa yang ditunjukkan dengan nilai Q-value yang rendah (0.0011231). Analisis secara kualitatif pada NIRS tidak dapat membedakan susu hasil pemerahan pagi dan sore hari. Kata kunci: kualitas susu, NIRS, profil asam lemak, susu, waktu pemerahan., The objective of this study was to create calibration model using Near Infrared Reflectance Spectroscopy (NIRS) from dairy milk with the differences milking time. Milk sampling were collected from three different farms location in Pangalengan, Cibungbulang, and Kebon Pedes West Java. The quality of the milk samples were analyzed using lactoscan and gas chromatography (GC) to identified the FA profiles of milk. Sample also analyzed rapidly using NIRS. The result of analyzed using lactoscan and GC were stastistically tested using normality test and t-test carried out SPSS ver. 25. Analysis on GC and lactoscan it were found three parameters that significantly different (P<0.05) between morning and afternoon milking time, namely milk fat, C8:0 and C14:1. However, the result using NIRS indicate that all parameters have similar spectrum between morning and afternoon milking that marked by low Q-value (0.0011231). It is concluded that NIRS spectrum can not differentiate milk from morning and afternoon milking qualitatively. Keywords: FA profiles, milk, milking time, NIRS, quality of milk.
Keyword: Kualitas susu, NIRS, Profil asam lemak, Susu, Waktu pemerahan

Judul: Perencanaan Lanskap Jalan Western By Pass di Kotamadya Denpasar, Bali
Abstrak: Jalan Western By Pass dengan panjang keseluruhan .t 13 km merupakan salah satu jalan yang akan dibangun di wilayah Denpasar bagian barat, digunakan untuk menghubungkan daerah-daerah di sebelah utara (Tabanan, Kintamani, Sangeh, dll) dan selatan Denpasar (Kuta dan Nusa Dua). Jalan yang berfungsi sebagai jalan Arteri Primer ini bersama-sama dengan Northern dan Southern By Pass akan membentuk jaringan Outer Ring Road yang mengelilingi Kotamadya Denpasar dan direncanakan selesai serta mulai beroperasi secara optimal pada tahun 2002.
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