Copper Nanoparticles Prepared fromOxalic Precursors

The synthesis of nanoparticles of copper metal via a soft chemistry route is presented in this paper. The method is based on the thermal decomposition under nitrogen or hydrogen of oxalic precursors with a well-controlled morphology and particle size. The precipitation of the copper oxalates in a water-alcohol medium allows the submicron size of the precursor grains to be controlled and, consequently, the nanometric size of the metallic copper particles to be determined, as required, between 3.5 and 40 nm. The majority of the final particles are made of pure copper metal although some present a superficial layer of cuprous oxide (Cu2O)

Preparation and electrical properties of dense micro-cermets made of nickel ferrite and metallic copper

Dense micro-cermets made of nickel ferrites and copper micrometric particles were obtained from partial reduction under hydrogenated atmosphere at 350 C of mixed copper nickel ferrites, and sintering in nitrogen at 980 C. The small copper particles are homogeneous in size and well dispersed in the spinel oxide matrix. No exudation of copper metal was observed after sintering. The micro-cermets prepared are semi-conducting materials with electrical conductivity lying from 44 to 130 S/cm at 980 C. Their overall characteristics make them interesting for inert anodes dedicated to aluminium electrolysis in melted cryolite

Carcass and Muscle Distribution of Male Kacang Goat from Intensive Fattening with Different Initial Weight

Carcass and Muscle Distribution of Male Kacang Goat from Intensive Fattening with Different Initial Weight Kacang Goat is one of Indonesian native livestock having high potency of production that have to be preserved, especially in South Sulawesi. The purpose of this study was to evaluate carcass percentage of commercial cuts as well as muscle distribution of male kacang goat under intensive fattening system with different initial body weight. Twenty one male of kacang goats were randomly divided into three groups according to their initial body weight. The experiment was carried out according to completely randomized design consisted of three treatments (age group) and seven replications for each treatment. The animals were reared under intensive fattening system for three months. At the initial period of the experiment, each goat was weighed to obtained the initial body weight. At the end of the experimental period, each animal was weighed to obtain the slaughtered weight of each animal. Following the slaughter, carcass processing was performed for each animal. The carcass and carcass cuts then were weighed. The results of study showed that animals having a heavier initial body weight grew faster, had higher carcass percentage, and had lower non carcass percentage.The growth of male kacang goat muscle was evenly distributed

Partisi Fotosintat Beberapa Kultivar Kedelai (Glicine Max. (L.) Merr.) pada Ultisol

Soybean (Glycine max (L.) Merr.) is a legume plant that has high economic value containing 20 % fat and 40 % protein. Soybeans are used in a variety of industries, both for food industry and for livestock feed. This research aimed to determine the partition of photosynthates of some soybean cultivars on Ultisol of Poasia, Anduonohu in 2013. The experiment was conducted using polybags filled with 15 kg top soil that had been dried for 2 days. The experiment was conducted using 10 treatments (cultivars) and repeated 3 times so there were 30 experimental units. Each experimental consisted of 12 polybags so there were 360 polybags. Four seeds were sown in each polybag, and thinning was performed at the age of 2 weeks and left only two crops to grow. The research results showed that each cultivar has different photosynthate partitioning. In general, all cultivars provided the highest photosynthate partitioning to leaves and stems until the age of 75 day after planting during the vegetatif phase and into flowers and pods on the generatif phase. Burangram cultivar provided the highest photosynthate partitioning into the pods followed by cultivars Argomulyo, Grobogan, and Kaba

PENINGKATAN PRODUKTIFITAS SAPI BALI DENGAN PERBAIKAN PAKAN PADA PERIODE BREEDING DAN FASE PEDET

???????????????Sapi Bali merupakan ternak asli Indonesia yang banyak dipelihara oleh petani dan merupakan sumber pendapatan masyarakat petani ternak di Sulawesi Selatan dan bahkan sebagai sumber bahan pangan daging nasional asal ternak potong. Karena itu ternak ini menjadi komoditas unggulan Sulawesi Selatan pada bidang peternakan. Berdasarkan hal ini, Rencana Induk Penelitian (RIP) Universitas Hasanuddin, sapi Bali merupakan prioritas utama dalam pengembangan komoditas unggulan pada bidang peternakan. Masalahnya adalah tingkat produktifitas dan performans sapi Bali masih rendah. Hal ini dapat dilihat bahwa sangat sulit untuk mendapatkan sapi bibit betina dengan tinggi pundak melebihi dari 104 cm. Rendahnya tingkat produktifitas ternak mungkin disebabkan karena peternak tidak memperhatikan faktor manajemen dan bibit yang digunakan. Oleh karena perlu dilakukan penelitian pengembangan yang komprehensif dan berkelanjutan yaitu bagaimana peningkatan produktifitas dan performans sapi Bali melalui perbaikan manajemen terutama perbaikan pakan pada periode breeding dan pedet. \ud ???????????????Target khusus yang ingin dicapai dalam penelitian ini adalah untuk mendapatkan bibit sapi Bali yang berstandard nasional dengan tingkat produktifitas tinggi. Untuk mencapai tujuan dan target tersebut, maka metode penelitian adalah dirancang dengan melakukan perbaikan pakan pada periode breeding/pembiakan dan fase pedet secara berkelanjutan. Kemudian melihat body condition score (BCS), tingkat produktifitas induk termasuk post partus estrus pertama setelah kelahiran, tingkat kebuntingan dan service perconception (S/C). \ud ???????????????Hasil penelitian pada tahun pertama menunjukan bahwa perbaikan managemen dengan perbaikan pakan pada periode breeding dapat memperbaiki kondisi induk setelah melahirkan dengan BCS 5,40,8 menjadi 6,31,0 selama 3 bulan pemeliharaan dengan sistem intensif dan 6,70,8 selama 6 bulan pertama pemeliharaan. Post-partus esterus pertama 64,531,5 hari. Tingkat kebuntingan 53,8% dengan S/C 2,20,5 selama 3 bulan pemeliharaan dan 100% tingkat kebunting dengan S/C 2,90,8 selama 6 bulan pemeliharaan.\ud Indikator capaian luaran yang targetkan 1) model managemen pada periode breeding pada sapi Bali, 2) publikasi akreditasi Nasional dan International dan 3) satu buku pedoman praktis dengan judul ???Peningkatan Produktifitas Sapi Bali dengan Perbaikan Manajemen dan Pakan Basis LEISA???

Is taking gender into account for development and diffusion of agricultural innovations justified? The case of drought tolerant maize in Northern Benin

This study was initiated to contribute to the debate on the relationship between gender and adoption of innovations. It aims, under a participatory varietal selection, to identify the preferences of men and women farmers on maize varieties tolerant to drought in northern Benin. The methodology used is a comparison of two approaches to identify the best varieties according to gender. The first combines criteria weighting and a comparison of varieties. The second is based on the principle of democratic vote. Sixty farmers have participated in this study. The results of this work show two keys points. At the stage of criteria selection, women identified the organoleptic quality as a preferred seed characteristic. By comparing the results of the two methods of choice, it appears that both methods lead to the same results in the case of women’s preferences, while in men groups, the results vary according to the methods. It contributes to the literature by showing how distinctly women can prioritize criteria that are not the top concern of the men and by the way, can contribute to increase the adoption of varieties that contains both preferences of men and women

Pengungkapan isi dan latar belakang nilai budaya kelong makassar puisi makassar dalam naskah kuno

Kelong Makassar ini adalah hasil penelitian dari A. Gani, Husnah G, Baco B, Baddarudin, yang dibiayai oleh Proyek Penelitian dan Kebudayaan Nusantara Jakarta pada Tahun Anggaran 1986/ 1987. Kelong Makassar adalah tergolong naskah kuno yang ditulis dengan tangan, tetapi ada juga yang sudah dicetak. Terhadap naskah yang sudah dicetak (disalin) diperkirakan umumya seratus tahun. Media Kelong ini tidak jauh bedanya dengan pan tun dalam kesusastraan Melayu/ Indonesia, dimana bahasanya disusun rapi, dan diatur sangat indah. Dan apabila diucapkan akan menimbulkan irama, sehingga Kelong itu dapat juga dinyanyikan. Berbeda dengan masyarakat di Jawa dan Bali, pesan-pesan nilai budaya nenek moyang yang luhur ditranformasikan lewat tembang-tembang yang sudah diatur oleh pada lingsa dan guru lagu. Tentu hal itu mempunyai tujuan yang sama yaitu agar orang yang mendengarkannya (orang yang dinasehati) juga orang yang menasehati tidak menimbulkan kebosanan dan rasa jenuh. Sehingga, penyampaian lewat tembang diterimanya sebagai hiburan dan mudah dimengerti serta mudah mengingat atau menahafalkannya

Synthesis and characterization of Fe/Co/Ni alloys-MgO nanocomposite powders

A mixed oxalate β-Mg 0.896 Fe 0.047 Co 0.034 Ni 0.023 C 2 O 4 ·2H 2 O of well controlled size and morphology was prepared by coprecipitation. The corresponding quaternary solid solution between MgO, FeO, CoO and NiO was prepared by thermal decomposition and calcination in a H 2 /H 2 O/N 2 atmosphere. The selective reduction of the solid solution in an H 2 atmosphere was studied by a combination of X-ray diffraction, Mössbauer spectroscopy, transmission electron microscopy and associated analysis. This work has brought to light the very high stability of Fe 2+ , Co 2+ and notably Ni 2+ when substituted for Mg 2+ in the MgO rocksalt lattice. It is necessary to perform the reduction at 1300 °C fully to reduce the transition metal ions. The alloy particles are either distributed as relatively large particles (tens to hundreds of nanometers) at the surface of the MgO grains or as much smaller particles (≤20 nm) probably located inside the matrix grains and epitaxial with it. The composition distribution of the large surface particles is fairly broad when the reduction was performed at 1100 and 1300 °C. In contrast, it is much narrower in the powder prepared by reduction at 1200 °C, although the particles are still low in Ni compared to the target composition

Patio 2.12: Prefabricated, sustainable, self-sufficient and energy efficient house. Participation in the 2012 Solar Decathlon Competition

El prototipo Patio 2.12 fue la propuesta del equipo Andalucía Team para la competición Solar Decathlon Europe 2012 (SDE 2012), celebrada en Madrid en septiembre de 2012, en la que recibió hasta 9 premios, entre los que figura el de Eficiencia Energética. El equipo, integrado por profesores y alumnos de cuatro universidades andaluzas, trabajó durante dos años en el diseño y construcción de un prototipo de vivienda basada en la eficiencia energética, en la integración arquitectónica de los sistemas solares, en la prefabricación de escala intermedia y en una reinterpretación de la forma de vivir y construir de la tradición mediterránea. Patio 2.12 pretende ser un compendio de energía, sostenibilidad y mecanismos de acondicionamiento pasivo.The prototype “Patio 2.12” was Andalucía Team’s proposal for the 2012 Solar Decathlon Competition (SDE 2012), that was held in Madrid during September 2012, where it was awarded several prizes like the first one in Energy Efficiency. The team comprised a group of teachers and students from four Andalusian Universities. It worked for two years in the design and construction of a housing prototype that could be an example of several concepts at the same time: energy efficiency, architectural integration of solar systems, intermediate scale of prefabrication and a today´s interpretation of traditional Mediterranean way of living and building. Patio 2.12 was intended to be a compendium of energy, sustainability and passive conditioning devices