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2016 KOLEKSI Phaleria spp. DI KEBUN RAYA BOGOR Dra. Sri Hartini ,Dra. Sri Hartini Phaleria is one of the genus within the family Thymelaeaceae. The genus of Phaleria are generally used as an ornamental plant. There is one species that is well known in the medical world that is Phaleria macrocarpa (crown of the gods), although this plant is known containing toxins that are harmful to the human body. Other species are also potential to be a medicinal plant is Phaleria capitata. Bogor Botanic Gardens has 3 species collections of Phaleria, Phaleria capitata, Phaleria macrocarpa and Phaleria octandra. Lihat
2016 KEANEKARAGAMAN DAN KONSERVASI TUMBUHAN BUAH LANGKA INDONESIA Dodo S.P. Southeast Asia has about 400 species of fruits that can be eaten fresh and about 75% or 329 species of them are found in Indonesia, 226 species of which are the fruit of plants native to Indonesia. There are 31 species or about 14% of fruit plants native to Indonesia into the rare category. Mangifera is the largest genus in the list of endangered Indonesian fruit plants (10 species), next is Durio (7 species), and Aglaia (5 species). Mangifera also a lot of experienced high threaten in nature, such as Mangifera casturi who had not found anymore in their natural… Lihat
2016 KONSERVASI EX-SITU KANDOLE (Diploknema oligomera H.J. Lam) Dodo S.P. Kandole merupakan salah satu jenis tumbuhan langka Indonesia dari keluarga sawo-sawoan (sapotaceae) yang potensial untuk dikembangkan karena berpotensi sebagai tanaman peneduh, bahan bangunan, dan buah lokal. Konservasi kandole dilakukan untuk menyelamatkan tumbuhan tersebut dari kepunahan. Konservasi dilakukan melalui kegiatan eksplorasi, penanaman, dan perbanyakan. Kebun Raya Bogor telah berhasil melakukan konservasi kandole sebanyak lima pohon dengan nomor koleksi IV.D.151, 167, 167a; XXIV.A. 89, 89a. Koleksi tersebut sekarang berumur lebih dari 30 tahun, tingginya sudah mencapai 8 meter, diameter batang 30 cm, diameter tajuk 6 meter, dan masih produktif menghasilkan buah. Perbanyakan secara generatif akan berguna untuk menambah populasi kandole di habitat… Lihat
2017 Selamatkan anggrek Tien Soeharto Elizabeth Handini S.P. Upaya penyelamatan anggrek Tie Soeharto di Kebun Raya-LIPI meliputi regenerasi dan Iradiasi PLBs anggrek Tien Soeharto Lihat
2018 Catalytic Conversion of Biomass Derivatives to Lactic Acid with Increased Selectivity in Aqueous Tin(II) Chloride/Choline Chloride System Asep Bayu S.Si., M.T.,Akihiro Yoshida, Surachai Karnjanakom, Katsuki Kusakabe, Xiaogang Hao, Tirto Prakoso, Abuliti Abudula, Guoqing Guan Catalytic conversion of biomass-derived carbohydrates to lactic acid (LacA) over Sn-based catalysts always shows a low selectivity (<30%) in an aqueous system, especially when SnCl2 is used as the catalyst. In this study, the catalytic activity as well as selectivity of SnCl2 for conversions of trioses, monosaccharides and disaccharides into LacA in the aqueous phase reaction system was found to be increased by the addition of choline chloride (ChCl). As the concentration of ChCl was 40-50%, the reaction selectivities towards LacA reached to 40-77% at moderate reaction conditions (155-190 oC for 0.5-1.5 h). It is attributed to the formation of… Lihat
2018 Polyoxomolybdates catalysed cascade conversions of cellulose to glycolic acid with molecular oxygen via selective aldohexoses pathways (an epimerization and a [2+4] Retro-aldol reaction) Asep Bayu S.Si., M.T.,Surachai Karnjanakom, Akihiro Yoshida, Katsuki Kusakabe, Abuliti Abudula Guoqing Guan Selective cascade conversion of cellulose into valuable C2 or C4 products over acid catalysts is still not fully explored because glucose-fructose isomerization followed by fructose conversions is thermodynamically easy to occur during the reaction, leading the formation of C6, C5, C3 and C1 products such as 5-hydroxymethylfurfural (HMF), levulinates, lactates, formates, and so on. In this study, phosphomolybdates (PMo) with the Keggin structure was found to promote cascade oxidation of cellulose conversion via selective aldohexoses pathways, i.e. an epimerization and a [2 + 4] retro-aldol of glucose/mannose, rather than aldo-ketohexoses routes, i.e. a glucose-fructose isomerization and a [3 + 3] retro-aldol of fructose, which… Lihat
2018 An Effective Heterogeneous Catalyst of [BMIM]3PMo12O40 for Selective Sugar Epimerization Asep Bayu S.Si., M.T., Guoqing Guan The development of heterogeneous catalysts for the epimerization of sugars has received much less attention than that for the isomerization of sugars. To date, molybdates are the most effective catalysts for the epimerization of sugars, although they lack stability toward hydrolysis of their active sites in water. To solve the issue of the formation of a highly water‐soluble heteropolyblue (PMored) for phosphomolybdates (PMos) in aqueous reaction systems, herein, a 1‐butyl‐3‐methylimidazolium phosphomolybdate ([BMIM]3PMo12O40) was synthesized through an ion‐exchange method. This catalyst was effective and selective for the C2‐epimerization of sugars under mild reaction conditions (<100 °C; 1–2 h) with good water‐tolerant properties. The… Lihat
2018 Bifunctional Mg−Cu‐Loaded β‐Zeolite: High Selectivity for the Conversion of Furfural into Monoaromatic Compounds Asep Bayu S.Si., M.T.,Surachai Karnjanakom, Akihiro Yoshida, Irwan Kurnia, Xiaogang Hao, Panya Maneechakr, Abuliti Abudula, Guoqing Guan Mg−Cu‐loaded β‐zeolite was prepared as an acid−base bifunctional catalyst for the conversion of furfural to monoaromatic compounds. It is found that this catalyst exhibited high selectivity towards benzene, toluene and xylenes (BTXs) production with anti‐polycyclic‐aromatic‐hydrocarbon formation as well as anti‐coking ability when compared with Cu‐loaded β‐zeolite and the parent β‐zeolite. The product distribution indicated that addition of Cu species significantly promoted the deoxygenation and aromatization of an intermediate product of furan while Mg apparently suppressed the polyaromatization. Especially, an optimum loading amount of 0.5 wt%Mg‐1 wt%Cu on β‐zeolite was obtained, which showed lower catalytic deoxygenation temperature and interestingly, only benzene was detected… Lihat
2018 Selective deoxygenation of carboxylic acids to BTXs over Cu/β-zeolite prepared by ethylene glycol-assisted impregnation Wahyu Bambang Widayatno S.Si., Asep Bayu S.Si., M.T., Surachai Karnjanakom, Akihiro Yoshida, Irwan Kurnia, Xiaogang Hao, Panya Maneechakr, Abuliti Abudula, Guoqing Guan In this work, the selective conversion of hexanoic acid to hydrocarbons using Cu/β-zeolite-EG prepared by the ethylene glycol (EG) assisted impregnation method was investigated. It was found that Cu/β-zeolite-EG shows higher selectivity towards benzene, toluene and xylenes (BTXs) as well as higher resistance to coke deposition when compared to Cu/β-zeolite prepared by a conventional impregnation method. This should be attributed to the better dispersion and stronger interaction between the active Cu species and the β-zeolite surface in the Cu/β-zeolite-EG solid. This catalytic system shows potential practical application in the upgrading of bio-oil. Lihat
2017 Non-linear Isotherm Models, Cadmium Kinetics, and Biosorption Thermodynamics of Dried Biomass of Native Aphanothece sp. in a Batch System Dra. Awalina M.Si.,Prof. Dr. Ir. Gadis Sri Haryani , Prof. Dr. Tjandra Setiadi Abstract. Dried biosorbent was prepared from Aphanothece sp. cyanobacteria harvested from a photobioreactor system fed with atmospheric carbon dioxide. Cadmium-ion biosorption of the prepared biosorbent from aqueous solution was characterized by non-linear (Langmuir, Freundlich and Dubinin–Radushkevich) isotherms, non-linear kinetics (pseudo first-order and pseudo second-order) and thermodynamic analysis. The optimum conditions were pH 8.0, 30°C, 0.1 g/L biomass, and 60 min contact time. The biosorption efficiencies exceeded 90%. The low-range data (initial Cd concentration C0 = 1.09–6.23 mg/L) and high-range data (C0 = 5.41–83.07 mg/L) were best fitted to the Langmuir model, with maximum uptake capacities of 12.01 and 187.5 mg/g… Lihat