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Cincau merupakan salah satu tumbuhan yang banyak dimanfaatkan oleh masyarakat secara tradisional sebagai penurun panas dalam, obat sakit perut, juga sebagai antikanker, karena cincau diduga mengandung senyawa yang mempunyai aktivitas antioksidan yang mampu mematikan sel kanker. Telah dilakukan penelitian untuk membandingkan aktivitas antioksidan dari tiga macam cincau, yaitu cincau hitam, cincau hijau dan cincau perdu dengan metode peredaman radikal bebas DPPH. Masing-masing daun cincau di ekstraksi berturut-turut menggunakan n-heksana, etil asetat dan metanol. Hasil uji menunjukkan dari ekstrak n-heksana  tidak mempunyai aktivitas antioksidan. Hasil uji terhadap ekstrak etil asetat yang paling aktif berdasarkan nilai IC₅₀ adalah cincau hitam (IC₅₀ = 35,99 bpj), cincau perdu (IC₅₀ = 80,94 bpj) dan cincau hijau (IC₅₀ = 92,85 bpj). Hasil uji terhadap ekstrak metanol  yang paling aktif berdasarkan nilai IC₅₀ adalah cincau hitam (IC₅₀ = 32,59 bpj), cincau perdu (IC₅₀ = 39,82 bpj) dan cincau hijau ((IC₅₀ = 79,23 bpj). Dari ketiga jenis cincau dapat disimpulkan tanaman cincau memiliki aktivitas antioksidan dan cincau hitam mempunyai aktivitas antioksidan yang paling tinggi.

The concept of digital economy means digitalization of information using information and communication technology infrastructure profitable for accelerating local and international business activity of Indonesia in the globalization era. It encompasses trading of goods and services with sales and supply using digital economy. Electronic money transaction as in e-banking transaction, auto teller machine, debet card and the internet credit card transaction constitute of a part of digital economy that nowadays is significantly big in number and lucrative. Although digital economy activities in Indonesia has significantly big in accounting number and values totally, nevertheless there is no one local nor foreign scientific empirical research to form a model of digital economy development in Indonesia. It can be concluded that such digital economy modelling topic in Indonesia is necessary to be researched. 

A leader must have the soul of leadership to manage diversity of member in the organizations. Such pattern of leadership capable of uniting and motivating individual differences and unite groups will be able to drive organizational success. The leader works for unity maximum performance and organizational success. Leaders can be a powerful tool to unite the entire adhesive individuals and groups within the organization through the process of motivating the practice of members of the organization and building a culture of good organization. Organizations must have ideals, vision, mission and objectives so as to influence other organizations not only become mere followers.

This library research is based on the theory of Fred Selnes (1995). A professional lecturer should bear four important characteristics namely competency, communication, commitment and conflict handling to be ready to engage and manage lecturer – student interaction. Usually mastery in competence and communication would lead to student trust and communication, commitment and conflict handling mastery could lead to student satisfaction, meanwhile student satisfaction could lead to trust and student trust could lead to enhancement and the student enhancement could lead to loyalty. Nevertheless satisfaction could also lead directly to enhancement and satisfaction may be lead directly to loyalty.