Judul: The Diversity of Freshwater Shrimp in East Kalimantan
Abstrak: Udang air tawar tersebar luas di Indonesia, termasuk dalam anggota dari subfilum Crustacea dan ordo Decapoda. Udang air tawar yang banyak ditemukan di Indonesia adalah famili Atyidae dan Palaemonidae. Anggota famili Atyidae yang umumnya ditemukan dari genus Caridina, sedangkan anggota famili Palaemonidae yang umumnya ditemukan dari genus Macrobrachium. Informasi mengenai keanekaragaman udang air tawar di Kalimantan Timur belum dilaporkan sedangkan, kualitas perairan di Kalimantan Timur semakin menurun seiring dengan meningkatnya kegiatan ekploitasi sumber daya alam. Penelitian ini akan dimanfaatkan sebagai informasi dasar keanekaragaman jenis udang air tawar untuk masa depan sebelum terjadi perubahan lebih lanjut di wilayah Kalimantan Timur. Metode yang digunakan untuk identifikasi spesies dilakukan dengan mengunakan karakter morfologi dan diverifikasi menggunakan DNA barcoding. Pengamatan karakter morfologi dilakukan dengan kamera dan juga mikroskop stereo. Hasil pengamatan karakter morfologi yang ditemukan kemudian dibandingkan dengan kunci identifikasi dan deskripsi spesies udang air tawar. Analisis DNA barcoding dilakukan dengan tahapan ekstraksi, amplifikasi gen COI, elektroforesis, sekuensing DNA, dan pengolahan data menggunakan MEGA 11 dan mrBayes. Proses analisis data keragaman genetik gen COI antar populasi udang air tawar dilakukan dengan menggunakan DNAsp Penelitian ini melaporkan catatan Keanekaragaman Udang Air Tawar di Kalimantan Timur yaitu terdapat 11 spesies udang air tawar telah terkonfirmasi, famili Palaemonidae berjumlah tujuh spesies yaitu Marobrachium rosenbergii, M. lanchesteri, M. Scabriculum, M. mammillodactylus, M. sintangense, M. equidens dan M. villosimanus, sedangkan famili Atyidae berjumlah 4 spesies yaitu Caridina typus, C. peninsularis, C. gracilipes dan C. propinqua dari famili Palaemonidae. Serta ditemukan distribusi pada spesies M. sintangense di Kalimantan Timur dengan wilayah lain yaitu Jawa merupakan populasi yang berbeda. Populasi M. sintangense di Kalimantan Timur dan Thailand diketahui memiliki keterhubungan genetik, sementara berbeda secara genetik dari populasi di Jawa., Freshwater shrimps are widely distributed in Indonesia, belonging to the subphylum Crustacea and the order Decapoda. The most commonly found freshwater shrimps in Indonesia are from the families Atyidae and Palaemonidae. Members of the family Atyidae are generally found in the genus Caridina, while members of the family Palaemonidae are commonly found in the genus Macrobrachium. Information on the diversity of freshwater shrimps in East Kalimantan has not yet been reported, while the water quality in East Kalimantan continues to deteriorate due to increasing natural resource exploitation activities. This research will serve as baseline information on the diversity of freshwater shrimp species for the future before further changes occur in the East Kalimantan region. The method used for species identification involves morphological character analysis and verification using DNA barcoding. Morphological character observations were conducted with the help of cameras and stereo microscopes. The observed morphological characters were then compared with identification keys and descriptions of freshwater shrimp species. DNA barcoding analysis was carried out through the steps of extraction, COI gene amplification, electrophoresis, DNA sequencing, and data processing using MEGA 11 and MrBayes. Genetic diversity analysis of the COI gene among freshwater shrimp populations was performed using DNAsp. This study reports on the diversity of freshwater shrimp in East Kalimantan, confirming the presence of 11 species. The family Palaemonidae is represented by seven species: Marobrachium rosenbergii, M. lanchesteri, M. scabriculum, M. mammillodactylus, M. sintangense,
Keyword: Caridina, COI, distribution, genetic distance, Marobrachium

Judul: Keanekaragaman udang air tawar pada berbagai tipe habitat di Provinsi Jambi
Abstrak: The freshwater shrimp can be found in Indonesia Indonesia is consisted of families Atyidae and Palaemonidae of the order Decapoda. The main barrier factors influencing the presence of freshwater shrimp include habitat characteristics and environmental quality in each habitat type. Jambi Province, including the areas with lowland tropical rainforest has the highest deforestation rate in the Asian region. Effects of changes in forest conversion to agricultural habitats will change the ecosystem conditions. It is thought to affect macroinvertebrate diversity therein. The purpose of this research is to study the diversity of the river freshwater shrimp found in oil palm plantation, rubber plantation, community forest and secondary forest in relation to the convertion of forest and to clarify the species through DNA barcoding. The shrimps were collected from two locations, i.e. Batanghari and Sarolangun Regencies. The collection of the freshwater shrimps were conducted in four habitat types, i.e oil palm plantation, rubber plantation, community forest, and secondary forest. The research locations were chosen purposively and continued road sampling. Samples were taken by using a hand net and fish trap. Specimens’ identification were based on Wowor et al. 2004 and Cai et al. 2007. The environmental factors observed velocity (m/second),depth (cm), brightness (cm), temperature (°C), pH and substrate type. To see the effect of forest conversion to the diversity freshwater shrimp were analysed with Kruskal-Wallis non-parametric analysis continued with Multiple Comparisons. The relationship of the distribution of the freshwater shrimp were tested with Canonical Correspondence Analysis. Community structure were analysed with calculated diversity indexs, the eveness, and the similarity of habitats by using Primer 5 program. The study revealed six spesies of freshwater shrimp consisted of Macrobrachium malayanum, M. pilimanus, M. lanchesteri, Caridina malayensis, C. propinqua, C. excavatoides. Macrobrachium malayanum. Highest amount of diversity and evenness in Batanghari Regencies found in the oil palm plantation (H '= 0.934) and community forests (E = 0.934). Analysis of habitat similarities between habitats showed that oil palm and rubber plantations have similar habitat types, and different people in the forest habitat.... The freshwater shrimp diversity and eveness in Batanghari found high in the oil palm plantation (H’=1.148) and community forest (E=0.934). Analysis of habitat similarity between habitat oil palm plantations and rubber plantations have similar habitat type, and different in community forest. The freshwater shrimp diversity and eveness in Sarolangun found high in the secondary forest (H’=0.699) and community forest (E=0.6909). Analysis of habitat similarity between habitat community forest and rubber plantations have similar habitat type, while secondary forest habitat have similar with oil palm plantation. Based on the analysis of Canonical Analysis corespondance that environmental factors affecting the distribution of certain shrimp. This is shown in Batanghari Regencies , Macrobrachium lanchesteri distribution was affected by the altitude, width and pH. Caridina malayensis, C. excavatoides and C. propinqua distribution was affected by temperature and pH. Distribution of M. pilimanus and M. malayanum was affected by velocity and brightness. At the Sarolangun Regencies, distribution M. malayanum was affected by pH and temperature, while the distribution of M. lanchesteri was affected by pH and brightness. Based on the analysis
Keyword: diversity, freshwater shrimp, Macrobrachium, Caridina, DNA Barcode

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4