Corrosion inhibition properties of eugenol derivatives have been elucidated by means of density functional theory at B3LYP/ 6-31G(d) level of theory. The quantum chemical parameters including the highest occupied molecular orbital (E HOMO ) and lowest unoccupied molecular orbital (E LUMO ), gap energy (∆E gab ), ionization potential (I), electron affinity (A), the absolute electronegativity (χ), hardness (η), softness (σ), and the fraction of electron transferred (ΔN) are studied for investigating the corrosion inhibition performance of acetyleugenol derivatives. Effect of electron donating and withdrawing groups has been studied on the corrosion inhibition performance of acetyleugenol derivatives. The NH 2 (electron donating substituent) exhibits the highest inhibition efficiency, whereas the NO 2 (electron withdrawing substituent) exhibits the lowest inhibition efficiency. This study would have a significant contribution in designing highly potential eugenol based corrosion inhibitors.

The Cikaniki resort is one of the most accessible research stations located in the Gunung Halimun Salak National Park (GHSNP). It is in adjacent with Citalahab village. The Research Center for Biology, Indonesian Institute of Sciences and other institutions have conducted intensive research on the fauna diversity of GHSNP from this station. Here we formulate a checklist on fauna diversity surrounding the Cikaniki Research Station and Citalahab, GHNSP from various sources, i.e. field work, museum collections (Museum Zoologicum Bogoriense), scientific publications, and technical report. The study was conducted from October 2019 until October 2020. The latest field work was conducted from 8-10 October 2019 under the framework of the Jungle Survival and Biological Collection Management 2019 program. In total, 821 fauna species were recorded in Cikaniki-Citalahab areas which comprises of 48 species of Mollusca, five species of Malacostraca, 523 species of Insects, 22 species of Actinopterygii, 63 species of Amphibia and Reptiles, 115 species of Aves and 45 species of Mammals. The diversity contributes 62.1% of the total 1,323 known fauna species in GHSNP. Five number of species were assigned as endangered and three species critical endangered by IUCN. In addition, 123 species were endemic to Java and 34 species protected by Regulation of the Ministry of Environment and Forestry Republic of Indonesia Number P.106/MENLHK/SETJEN/KUM.1/12/2018. The areas of Cikaniki and Citalahab are rich in biodiversity. Although both areas are in close intact with human activity, research and ecotourism, the need of continuously spreading awareness and enforce species and area conservation is inevitable.

Buku ini berisi 52 spesies mamalia terpilih di Pulau Jawa dengan kriteria endemik, status konservasi, peran alamiah penting dan keunikannya; dilengkapi dengan nama ilmiah, nama lokal, gambar dan peta sebaran. Ditulis secara rinci dengan gaya bahasa yang sederhana dan lugas sehingga mudah dipahami berbagai kalangan. Detail informasi yang disajikan dalam buku ini meliputi klasifikasi, deskripsi, ekologi, habitat, ancaman, dan status konservasinya sesuai dengan Permen LHK No. 106 Tahun 2018 serta status populasinya menurut IUCN dan CITES. Buku ini diharapkan dapat membantu para pengambil kebijakan dan masyarakat dalam mengenal lebih jauh mamalia yang ada di Pulau Jawa dan membantu dalam upaya konservasinya. Selain itu juga untuk melengkapi khazanah ilmu pengetahuan di Indonesia.

The Cikaniki resort is one of the most accessible research stations located in the Gunung Halimun Salak National Park (GHSNP). It is in adjacent with Citalahab village. The Research Center for Biology, Indonesian Institute of Sciences and other institutions have conducted intensive research on the fauna diversity of GHSNP from this station. Here we formulate a checklist on fauna diversity surrounding the Cikaniki Research Station and Citalahab, GHNSP from various sources, i.e. field work, museum collections (Museum Zoologicum Bogoriense), scientific publications, and technical report. The study was conducted from October 2019 until October 2020. The latest field work was conducted from 8-10 October 2019 under the framework of the Jungle Survival and Biological Collection Management 2019 program. In total, 821 fauna species were recorded in Cikaniki-Citalahab areas which comprises of 48 species of Mollusca, five species of Malacostraca, 523 species of Insects, 22 species of Actinopterygii, 63 species of Amphibia and Reptiles, 115 species of Aves and 45 species of Mammals. The diversity contributes 62.1% of the total 1,323 known fauna species in GHSNP. Five number of species were assigned as endangered and three species critical endangered by IUCN. In addition, 123 species were endemic to Java and 34 species protected by Regulation of the Ministry of Environment and Forestry Republic of Indonesia Number P.106/MENLHK/SETJEN/KUM.1/12/2018. The areas of Cikaniki and Citalahab are rich in biodiversity. Although both areas are in close intact with human activity, research and ecotourism, the need of continuously spreading awareness and enforce species and area conservation is inevitable.

Buah api-api putih (Avicennia alba Blume) mengindikasikan adanya senyawa berupa golongan flavanoid dan tanin yang diduga mempunyai kemampuan  sebagai  tabir  surya  dan mampu memberikan efek perlindungan terhadap radiasi ultraviolet. Penelitian ini bertujuan menguji keefektifan buah api- api putih sebagai tabir surya yang dapat menyerap sinar radiasi ultraviolet (UV) dari paparan sinar matahari. Parameter  pengujian  meliputi uji stabilitas fisika  dan kimia serta uji efektivitas tabir surya dengan menentukan nilai SPF (Sun Protection Factor) menggunakan spektrofotometer ultraviolet sinar tampak (UV-Vis) pada panjang gelombang 290-320 nm.  Hasil evaluasi menunjukkan tidak adanya perbedaan signifikan antara formula 1 sampai formula 3 (F1-F3) untuk penampakkan warna, bau dan homogenitasnya. Sediaan berwarna hijau, homogen dan berbau khas ekstrak tapi tidak terlalu pekat. Warna sediaan dipengaruhi warna sampel buah api- api putih yang berwarna hijau. Nilai pH pada F1-F3 masing-masing 6,7; 7,3 dan 8,0 yang menunjukkan nilai tersebut masuk dalam kisaran standar SNI 16-4399-1996 untuk produk kulit tabir surya yaitu berkisar antara 4,5-8,0. Nilai SPF ekstrak buah api-api putih dari F1-F3 masing-masing 16,72; 19,16 dan 21,86. Berdasarkan standar nasional Indonesia nilai SPF tabir surya minimal 15. Hal ini dapat dikatakan bahwa bahan aktif ekstrak buah api-api putih efektif sebagai tabir surya.