Judul: Analisis Karakter Morfologi, Anatomi, dan Struktur Sekretori Tanaman Ciplukan (Physalis angulata L.).
Abstrak: Ciplukan (Physalis angulata L.) merupakan tanaman herba yang tumbuh liar sebagai gulma di lading dan tersebar luas di daerah tropis dan sub tropis. Di berbagai negara tumbuhan ini dimanfaatkan sebagai obat tradisional. Penelitian ini bertujuan mengetahui keanekaragaman morfologi ciplukan di lingkungan tumbuh dengan iklim mikro yang relatif sama, mengetahui struktur anatomi tanaman dan struktur sekretori, serta kandungan senyawa yang terdapat di dalamnya. Pengamatan morfologi menggunakan tumbuhan liar yang tumbuh di lapang. Karakter yang diamati meliputi perawakan tumbuhan, daun, batang, bunga, dan buah. Analisis karakter morfologi menunjukkan variasi dari bentuk helai daun, bentuk tepi daun, diameter bunga, panjang tangkai bunga, panjang buah, diameter buah, dan panjang tangkai buah. Pengamatan struktur anatomi, sekretori, dan histokimia menggunakan tumbuhan yang ditanam di rumah kaca. Organ tumbuhan yang diamati meliputi daun, batang, dan akar. Analisis karakter anatomi menunjukkan kerapatan stomata pada sisi abaksial lebih besar dibandingkan sisi adaksial, namun ukurannya lebih besar pada sisi adaksial. Trikoma kelenjar yang terdiri atas satu sel basal, satu sel tangkai, dan empat sel kepala ditemukan pada helai daun dan batang ciplukan. Hasil uji histokimia mengungkap akumulasi dua senyawa metabolit sekunder yaitu alkaloid dan terpenoid pada trikoma kelenjar.
Keyword: alkaloid, histokimia, Physalis angulata, trikoma kelenjar

Judul: Toksisitas Ekstrak Ciplukan (Physalis angulata) Berdasarkan Uji Letalitas Larva Udang
Abstrak: Physalis angulata known as ciplukan in Indonesia is widely used as herbal medicinal plant. Studies on this plant revealed its potency as antidiabetic, antioxidant, antimicrobial, and antiasthma, but the toxicity is not reported yet. This study aimed to determine the toxicity of leaf extracts from ciplukan by using brine shrimp lethality test (BSLT). Phytochemical test of crude ethanolic extract indicated the presence of alkaloids, flavonoids, and steroids. Ethanol crude extract was extracted by liquid-liquid extraction and gave 2 extracts, namely n-hexane and ethyl acetate extracts. BSLT results showed that all the extracts were toxic. n- Hexane extract was the most toxic extract with value of LC50 3 ppm, indicating its potency as anticancer.
Keyword: Bogor Agricultural University (IPB), Physalis angulata, ciplukan, brine shrimp lethality test

Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model