238 research outputs found
First description of myxozoans from Syria: novel records of hexactinomyxon, triactinomyxon and endocapsa actinospore types
No full textOligochaete worms collected in late March and early April 2005 from 3
freshwater biotopes in Syria were surveyed over an 11 wk period for
myxosporean parasites (Myxozoa). Three types of novel actinospore
stages were identified from 1 host species, Psammoryctides albicola. A
hexactinomyxon was found in 6 P. albicola (7.5%) collected from a
branch of the River Orontes, north of the city of Hama. A
triactinomyxon and an endocapsa were found in single P. albicola
specimens from the Al-Thaurah region of the Euphrates River (Lake
Assad). No oligochaetes collected from Al-Ghab fish farm (Orontes
region) released actinospores during the observation period. The
present study is the first description of myxosporeans, including
actinospore stages, from Syria. The 3 types described herein differ
morphologically and molecularly (18S rDNA) from published records
RANCANG BANGUN ALAT PEMBASMI HAMA WERENG BERTENAGA SURYA BERBASIS ARDUINO
No full textAbstrakIndonesia merupakan negara tropis yang mayoritas penduduknya mengonsumsi nasi dan dapat dikatakan nasi adalah makanan pokok masyarakat Indonesia. Nasi sendiri berasal dari beras yang berasal dari tanaman padi, maka tidak heran jika padi merupakan salah satu tanaman yang paling penting untuk menghasilkan makanan bagi masyarakat Indonesia. Banyak hal – hal yang dapat mengancam produksi tanaman padi, dan masalah utama yang paling sering menghambat atau bahkan menggagalkan produksi tanaman padi karena gagal panen adalah hama wereng. Salah satu solusi yang sering digunakan untuk mengatasi permasalahan hama wereng ini adalah dengan penggunaan pestisida, namun penggunaan pestisida tidak hanya dapat membasmi hama wereng namun juga dapat memberikan dampak negatif kepada petani padi, lingkungan disekitar area sawah, dan juga para konsumen. Solusi alternatif yang ditawarkan penulis adalah dengan membasmi hama wereng menggunakan metode lain selain penggunaan pestisida, yaitu dengan sengatan listrik. Namun, alat pembasmi hama wereng yang dirancang ini juga harus memperhatikan faktor ketersediaan sumber energi listrik. Penulis merancang alat pembasmi hama wereng dengan menggunakan kawat alumunium yang dialiri arus listrik dan menggunakan beban berupa lampu LED yang dapat memancing perhatian hama wereng. Karena beban hanya bekerja pada malam hari maka dilakukan pengujian arus dan tegangan yang dihasilkan oleh panel surya dan juga arus dan tegangan yang telah diturunkan oleh rangkaian buck converter dari 20,044V menjadi 12,729V yang menuju ke baterai untuk pengisian daya baterai pada siang hari. Waktu kerja alat ditentukan oleh LDR yang akan memberi sinyal masukan kepada modul relay HW-307 untuk meneruskan tegangan baterai kepada rangkaian beban. Konsumsi arus yang diperlukan beban sebesar 416mAh perhari, sedangkan pengisian baterai sebesar 461mAh perhari sehingga alat dapat bekerja secara terus – menerus.Kata kunci: Hama Wereng, Panel Surya, Buck Converter, MPPT, LDR.AbstractIndonesia is a tropical island whom the majority of the people are consuming rice as the staple food. Rice itself came from the rice plants, and so it isn’t any surprise that rice plants are one of the most important plants to produce food for Indonesian people. Many things can be a threat for the producement of rice plants, and one of the main problems that often hinder or even ruining the producement of rice is because of planthoppers. One of the most used solution for this problem is the usage of pesticide, but this can also give a negative effect onto the rice farmer, the surrounding environment of the rice fields, and to the consumer. Alternate solution offered by the author rather than keep using pesticide is to use an electric shock. However, the planthopper zappers designs also need to pay attention to the availability of electrical power sources. The author designed the planthopper zapper with alumunium wires with electrical current flowing through and an electrical load of one LED lamp that can attract the planthoppers. Because the load is only going to work at night, so the current and the voltage of the solar panel need to be measured, the current and voltage of the buck converter also need to be measured as well from 20,044V to 12,729V that flows to the battery for charging at day. The operation time of the planthopper zappers is determined by the LDR which will give a signal to relay module HW-307 to forward the battery voltage towards the load. The current consumpsion the load needed is 416mA each day, while the charging battery is 461mAh each day, so the device can run continuously.Keywords: Planthopper, Solar Panel, Buck Converter, MPPT, LDR
アモルファス氷及びメタノールの光分解ダイナミクス
No full text京都大学0048新制・課程博士博士(工学)甲第15394号工博第3273号新制||工||1493(附属図書館)27872京都大学大学院工学研究科分子工学専攻(主査)教授 川﨑 昌博, 教授 田中 庸裕, 教授 今堀 博学位規則第4条第1項該当Doctor of Philosophy (Engineering)Kyoto UniversityDA
Experimental studies of surface reactions among OH radicals that yield H2O and CO2 at 40-60 K
No full textWe investigated the OH-related formation routes of two astrophysically important molecules, H2O and CO2, under relatively warm astrophysical conditions. OH radicals, together with other neutral species such as H, O, H2, and O2, were produced in H2O microwave-discharge plasma and cooled to 100 K before being deposited on an Al substrate at 40-60 K. H2O formed at 40 and 50 K, but not at 60 K. Taking the experimental conditions into account, a possible route of H2O formation is via reactions involving OH + OH, which yield H2O2 as the main reaction product. The present study is the first to show experimentally that surface reactions of two OH radicals can yield H2O at low temperatures. The products' branching ratio was 0.2 and 0.8 for H2O and H2O2, respectively. When CO was co-deposited with neutral species that formed in the H2O plasma, CO2 was formed at 40-60 K. H2CO3 formed at 40 and 50 K. The present results may suggest that chemical reactions related to OH radicals are effective at yielding various molecules in relatively warm astrophysical environments, such as protostars
Interactions of Atomic and Molecular Hydrogen with a Diamond-like Carbon Surface: H2 Formation and Desorption
No full textThe interactions of atomic and molecular hydrogen with bare interstellar dust grain surfaces are important for understanding H2 formation at relatively high temperatures (>20 K). We investigate the diffusion of physisorbed H atoms and the desorption energetics of H2 molecules on an amorphous diamond-like carbon (DLC) surface. From temperature-programmed desorption experiments with a resonance-enhanced multiphoton ionization (REMPI) method for H2 detection, the H2 coverage-dependent activation energies for H2 desorption are determined. The activation energies decrease with increasing H2 coverage and are centered at 30 meV with a narrow distribution. Using a combination of photostimulated desorption and REMPI methods, the time variations of the surface number density of H2 following atomic and molecular hydrogen depositions are studied. From these measurements, we show that H2 formation on a DLC surface is quite efficient, even at 20 K. A significant kinetic isotope effect for H2 and D2 recombination reactions suggests that H-atom diffusion on a DLC surface is mediated by quantum mechanical tunneling. In astrophysically relevant conditions, H2 recombination due to physisorbed H-atoms is unlikely to occur at 20 K, suggesting that chemisorbed H atoms might play a role in H2 formation at relatively high temperatures
Exploratory Study of Reservoir Sedimentation by 2D and 3D Mathematical Modelling
No full textDifferent processes and phenomena related to reservoir sedimentation were simulated for a real and schematized reservoir, using Delft3D software, results were compared with the sedimentation of the Cachi Reservoir in Costa Rica
Pengaruh Pestisida Alami Untuk Membasmi Hama Pada Tanaman Cabai di Rumah Petani Karangjati
No full textAbstrakTanaman cabai merupakan tanaman yang banyak dijumpai di Indonesia. Petani melakukan budidaya tanaman cabai karena minat dari masyarakat akan cabai sangat tinggi. Namun petani selalu dihadapkan dengan permasalahan hama yang sering menyerang tanaman cabainya. Kebanyakan petani menggunakan pestisida kimia untuk memberantas hama pada tanamannya. Memang cepat dalam memberantas hamanya, namun kurang baik dalam segi lingkungan dan kesehatan manusia. Untuk itu, penulis akan memberikan alternatif untuk memberantas hama yang ada ditanaman tanpa adanya efek samping baik tanaman itu sendiri maupun ekosistem disekitarnya. Metode yang digunakan dalam kegiatan pengabdian masyarakat ini yaitu observasi dan wawancara. Pembuatan pestisida alami ini menjadi salah satu alternatif karena ramah lingkungan dan aman untuk kesehatan manusia. Pestisida alami ini terbuat dari kotoran kambing, dan rempah-rempah yang sering digunakan ibu dalam memasak. Pestisida ini disosialisasikan kepada masyarakat khususnya yang bergerak di bidang pertanian. Untuk mengetahui efektif tidaknya penggunaan pestisida alami dalam memberantas hama dilakukan dengan pengamatan setelah penyemprotan pestisida alami secara rutin untuk tanaman cabai yang terserang hama. Sehingga dari pengamatan ini didapati penggunaan pestisida dari kegiatan pembuatan pestisida alami, penyemprotan pestisidanya ke tanaman yang terdapat hama, penyemprotan dilakukan sehingga didapati dari hasil pengamatannya pestisida ini cukup efektif dalam memberantas hama yang terdapat di tanaman cabai. Dari hasil pengamatan didapati penyemprotan pestisida alami secara rutin dapat meminimalisir penyebaran hama ditanaman. Kata Kunci: Pestisida Alami, Hama, Tanaman Cabai. AbstractChili plants are plants that are often found in Indonesia. Farmers cultivate chili plants because the public’s interest in chili is very high. However, farmers are always faced with the problem of pests that often attack their chili plants. Most farmers use chemical pesticides to eradicate pests on their crops. It is fast in eradicating the pests, but it is not good in terms of the environment and human health. For this reason, the author will provide an alternative to eradicate pests that exist in plants without any side effects, both the plant itself and the surrounding ecosystem. The method used in this community service activity is observation and interviews. Making natural pesticides is an alternative because it is environmentally friendly and safe for human health. This natural pesticide is made from goat dung, and spices that mothers often use in cooking. These pesticides are socialized to the public, especially those engaged in agriculture. To find out whether the use of natural pesticides is effective in eradicating pests is carried out by observing after spraying natural pesticides on a regular basis for chili plants that are attacked by pests. So from this observation it was found that the use of pesticides from the activities of making natural pesticides, spraying was carried out so that it was found from the observations that these pesticides were quite effective in eradicating pests found in chili plants. From the observations, it was found that regular natural pesticide spraying can minimize the spread of pests on plants.Key Word: Natural pesticides, pests, chili plants
Surface Processes on Interstellar Amorphous Solid Water: Adsorption, Diffusion, Tunneling Reactions, and Nuclear-Spin Conversion
No full text“Manar de ...”: reconfigurações do conceito de lar no conto “Manar of Hama” de Mohja Kahf
No full textExperiences in exile are individual and unique. For some individuals, they bring the new and their own culture together. For others it may be an experience of division, subtraction. This paper discusses how the protagonist of the short story “Manar of Hama”, written by the Arab-American author Mohja Kahf, deals with the feeling of isolation and displacement towards her new life in the United States. We also intend to analyze how her perspective changes regarding the concept of home. If, at first, all of her references of home are related to Syria, in a second moment, the text presents a shift in that perception. Whatever is perceived as familiar in the U.S. can also become a space of belonging and comfort.As experiências vivenciadas no exílio são individuais e únicas. Para alguns, elas operam uma aproximação entre a nova cultura e aquela que eles trazem consigo. Para outros, pode ser uma experiência de divisão, de subtração. O presente trabalho pretende analisar como a protagonista do conto “Manar of Hama”, da autora árabe-estadunidense Mohja Kahf, lida com o sentimento de displaçamento e isolamento diante da sua nova vida nos Estados Unidos. Pretende-se discutir também a mudança de perspectiva em relação ao conceito de lar. Se, em um primeiro momento, todas as suas referências de lar estão relacionadas à Síria, em um segundo, o conto apresenta um deslocamento dessa percepção. E o que lhe é mais familiar nos EUA também passa a constituir um espaço de pertencimento e conforto
The necessity of "Tebiki" to raise the children's will to write : Based on Ms. Hama Omura's class using "Travel Picture Book"
No full textIn this paper the author considered the effectiveness of“ Ms. Hama Omura’s“ Tebiki” in the class of using “Travel Picture Book”. In her class children wrote what they wanted to write happily and creatively. Because “Tebiki” played a very important role to help children write effectively. For example, it could give them hints to summarize their ideas or how to write easily. Through analyzing and considering the effectiveness of “Tebiki” in writing activities, the author recognized the possibility to raize chilren’s will to write. Based on that consideration, the author attemped to create a new “Tebiki” in the writing activity using photographs. It
is necessary to verify through practice in the future whether the content and writing style can be imagined and the motivation to write will increase by utilizing this Tebiki.departmental bulletin pape
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