Judul: Penentuan flavonoid total tempuyung, Sonchus arvensis L.  secara cepat dengan teknik spektroskopi inframerah dan kemometrik
Abstrak: Kehadiran spektrometer inframerah transformasi Fourier (FTIR) pada dasawarsa terakhir mampu meningkatkan aplikasi radiasi inframerah untuk analisis kuantitatif contoh yang rumit. Penelitian ini menggunakan teknik spektroskopi FTIR dan kemometrik sebagai alternatif metode analisis kandungan flavonoid total tempuyung (Sonchus arvensis L.). Analisis dilakukan secara cepat menggunakan serbuk tempuyung tanpa proses pemisahan terlebih dahulu. Serbuk contoh tempuyung dari tiga tempat tumbuh yang berbeda dianalisis dengan FTIR. Informasi spektrumnya (spektrum asli dan spektrum hasil proses pendahuluan dengan dan tanpa segmentasi) diolah dengan teknik kemometrik analisis komponen utama (principal component analysis, PCA) dan proyeksi struktur laten (partial least square, PLS). PCA digunakan untuk mengelompokkan tempuyung berdasarkan perbedaan tempat tumbuhnya, sedangkan PLS digunakan untuk membangun model prediksi flavonoid total tempuyung. Pengelompokan dan pembentukan model prediksi flavonoid total tempuyung yang cukup baik dihasilkan dari data spektrum hasil proses pendahuluan pada kisaran bilangan gelombang 3751-2815 cm-1. PCA mengekstraksi data spektrum segmen ini menjadi tujuh komponen utama pertama yang menggambarkan 99% total variasi tempuyung. Model regresi PLS dari segmen ini cenderung lebih stabil daripada model yang lain. Model ini dapat digunakan untuk memprediksi flavonoid total contoh tempuyung yang belum diketahui (r kalibrasi = 0.974, r validasi = 0.742, RMSEC = 0.023, RMSEP = 0.076, SEC = 0.023, bias kalibrasi = 0.000, SEP = 0.078, bias prediksi = -0.001, dan jumlah komponen utama = 7).
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Judul: Korelasi Spektrum Inframerah dan Aktivitas Antioksidan dari Daun Tempuyung (Sonchus arvensis) menggunakan Kemometrik
Abstrak: Daun tempuyung (Sonchus arvensis) diketahui memiliki banyak khasiat, salah satunya sebagai antioksidan. Tujuan penelitian ini adalah menetapkan gugus fungsi yang diduga aktif berperan dalam aktivitas antioksidan dan menentukan korelasinya. Sampel daun diekstraksi dengan pelarut air, etanol 10%, etanol 30%, etanol 50%, etanol 70%, dan etanol pa. Aktivitas antioksidan diuji dengan metode 1,1-difenil-2-pikrilhidrazil (DPPH) dan ditentukan gugus fungsi komponen ekstraknya menggunakan spektrofotometer inframerah Fourier. Aktivitas antioksidan dan kadar fenolik total tertinggi didapatkan pada ekstrak etanol 70%. Ekstrak dapat dikelompokkan berdasarkan ragam pelarut pengekstraksi menggunakan principal component analysis (PCA) dengan total PC 93%. Data serapan gugus fungsi dikorelasikan dengan aktivitas antioksidan menggunakan partial least square (PLS). Hasil analisis PLS menunjukkan bahwa gugus fungsi –OH dan C-O diduga merupakan gugus yang berkontribusi paling tinggi pada aktivitas antioksidan ekstrak daun tempuyung.
Keyword: antioksidan, fenolik total, FTIR, PCA, PLS

Judul: Elite formation in buginese and makassarese ethnics towards political hybrid culture
Abstrak: The purposed of this studi; (i) explore the transformation and interaction process of Buginese and Makassarese elites with their clients in achieving, maintaining and expanding their political and economic power, started from the traditional phase to secularism phase; (ii) discover the dynamics of Buginese and Makassarese elites formation specifically in political communication and economy in articulating their groups‘ interest and maintaining the political dynamic at every level; (iii) discover and understand the process of Buginese and Makassarese elites in using the symbols of culture, power, money and other political sosiology culture to achieve and maintain (reproduction) their power at the micro, mezzo and macro level. Constructive paradigm used in exploring the process of elite‘s formation in Buginese and Makassarese. A paradigm that position itself as the antitheses from the paradigm of positivism or post-positivism, which is relied heavily on observation and objectivity in finding a reality or knowledge. Constructivism stated that reality exists in several forms of mental constructions based on social experiences, it is locally and specific depends on the individual who did it (ontology). Therefore, reality that is observed by an individual cannot be generalized to other people. This confirmed that epistemological relation between observation and object is one entity, subjective, and as a result of integration of interaction among them. The result of this studi showed four phases of transformation process in the formation of Buginese and Makassarese elites; (i) traditional phase, where elite formation dominated by symbolic knowledge influence; (ii) feudalism phase; new capitalized era and land became a tool for power reproduction; (iii) Modern Islamic phase marked with the elites‘ awareness toward intellectuality and morality; (iv) Secularism phase, where pragmatism dominated in the existence of Buginese and Makassarese elites. Colonialization or ―bed politics‖ (political marriage) used during traditional, feudalism and modern Islamic phase, while transactional approach and politics hybrid culture, used during secularism phase in maintaining the elites‘ power. The process of elite formation in Bone used ―closed model‖. Stage of political power at Bone restricted only to aristocrats. On the contrary, influence and power of aristocrats at Gowa had been declined, thus political stage in Gowa more open and the elites‘ background are varied. Buginese of Bone predominantly used cultural symbols and power in achieving elite position, while the Makassarese of Gowa tends to use power, money and politic hybrid to engaged in the political power. Buginese elites tend to concentrate their power among them (same ethnicity, religion and territory), while the Makassarese elites (Gowanese) balance their power by sharing it according to the representation of territory, ethnicity and religion.
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