Magnetic Response of Magnetospirillum Gryphiswaldense

In this study we modelled and measured the U-turn trajectories of individual magnetotactic bacteria under the application of rotating magnetic fields, ranging in ampitude from 1 to 12 mT. The model is based on the balance between rotational drag and magnetic torque. For accurate verification of this model, bacteria were observed inside 5 m tall microfluidic channels, so that they remained in focus during the entire trajectory. From the analysis of hundreds of trajectories and accurate measurements of bacteria and magnetosome chain dimensions, we confirmed that the model is correct within measurement error. The resulting average rate of rotation of Magnetospirillum Gryphiswaldense is 0.74 +- 0.03 rad/mTs.Comment: 17 pages, 12 figure

Zakat on Bonds in Islamic Jurisprudence (Fiqh): Theory and Practice

Bonds are one of the contemporary financial instruments that need more understanding, clarification and research, and most studies focus on the theoretical side of bonds without addressing the practical side. Fiqh opinions focused on the provisions of zakat of bonds, their quorum and the amount of zakat. But none of the Fiqh opinions or books specialized in zakat clarified the ways for calculating zakat of bonds of all kinds in detail. In this research, the Fiqh opinion will be linked to the calculation of zakat on various bonds through the use of the principles of financial accounting. Thus, this research will provide a practical and applied reference for calculating zakat of bonds, and to be a reference in this field for each of the bond owners and the seeker of Sharia knowledge through calculating zakat of bonds and clarified more by applied mathematical examples

Continuous-flow production of isosorbide from aqueous-cellulosic derivable feed over sustainable heterogeneous catalysts

Continuous-flow sorbitol dehydration in liquid water was performed on β zeolite (Si/Al molar ratio = 75) with conversion of 94 and 83 mol % isosorbide yield. This efficiency is due to the three-dimension pore architecture, high specific surface area (520 m2 g–1), and Brønsted acid sites of 69 μmol g–1. The pore size of β zeolite (6.6 × 6.7 Å2) is slightly larger than the cross section of sorbitol and isosorbide and enables an efficient diffusion of the reactant and product to/from the pores. Operation in continuous flow allows rapid dehydration of sorbitol to 1,4-sorbitan, after which the latter got converted to isosorbide. The high yield of isosorbide is attributed to the continuous removal of the formed products from the catalyst surface. Finally, direct isosorbide production from aqueous glucose solution via hydrogenation on Ni catalyst supported on nitrogen-doped carbon, followed by dehydration of the formed sorbitol to isosorbide, was pioneered

Pemberian Jenis Pakan yang Berbeda terhadap Pertumbuhan dan Kelangsungan Hidup Benih Ikan Kakap Putih (Lates Calcalifer, Bloch)

Penelitian ini dilaksanakan padatanggal 1 Juni – 1 Juli 2014 di Tambak Daerah Cot Kafiraton Kecamatan Seunuddon, Kabupaten Aceh Utara. Metode yang digunakan dalam penelitian ini adalah metode ekperimental dengan menggunakan rancangan acak lengkap (RAL) Non Faktorial dengan lima perlakukan dan tiga kali ulangan yaitu perlakuan A: pemberian pakan jenis udang dogol perlakuan B: pemberian pakan jenis benih ikan nila; perlakuan C: pemberian pakan jenis keong mas ; perlakuan D: pemberian pakan pellet komersial. Parameter uji dalam penelitian ini adalah tingkat kelangsungan hidup, pertumbuhan, kecepatan konsumsi pakan dan kualitas air. Data hasil penelitian dianalisis secara deskriptif serta diuji dengan beda nyata terkecil (BNT). Hasil penelitian menunjukkan bahwa pemberian pakan alami yang berbeda memberi pengaruh yang sangat berbeda nyata terhadap pertumbuhan dan konsumsi pakan pada ikan kakap putih dimana Fhitung >Ftable yaitu pada perlakuan A. Akan tetapi tidak memberi pengaruh yang sangat berbeda nyata terhadap kelangsungan hidup ikan kakap putih. Nilai kualitas air selama penelitian yaitu baik dimana berada pada kisaran yang layak untuk kehidupan ikan kakap putih dengan pH 7,9-8,5, suhu berkisar 25-290C dan salinitas 23-26 ppt.The research was conducted on June 1 to July 1 2014 in Pond at Cot Kafiraton Seunuddon district, North Aceh. The experiment treatments was used on this study using a completely randomized design (CRD) non factorial with five treatments and three replicated which were A: feed types of dogol shrimp, B: feed type of tilapia seed, treatment C: feed type of snails, treatment D: feed type commercial pellets. Parameters of this study was the survival rate, growth, feed consumption rate and water quality. Data were analyzed descriptively and tested by the least significant difference (LSD). The results was showed that different types of feed had very effect significantly different on the growth and feed intake of sea bass (Fcal>Ftab). However, different fedd types did not give significantly different influence on the survival rate of sea bass. Water quality parameters were in suitable condition for sea bass habitats. The value of pH was 7,9-8,5, temperature 25-29 0C and salinity 23-26 ppt

Shear Behavior of Steel I-Beams Strengthened With CFRP Strips

This paper studies the behavior of simply supported steel I-beams strengthened with carbon fiber reinforced polymers (CFRP) strips on the web as shear reinforcement. The experimental program contains seven simply supported steel beams. One of them was considered as a control beam and the other specimens were strengthened with different schemes; varying the position of CFRP strips to the web, its number of layers and its angle of orientation. The results show that applying CFRP strips on the web of the steel I-beams was an effective strengthening method for increasing the load bearing capacity and decreasing the deformations. Using two layers of diagonal CFRP strips on both sides of the web realized the highest increasing in the load capacity. Moreover, finite element analysis method has been utilized to analyze the tested specimens using ANSYS. A great convergence between the experimental results and the corresponding ones obtained from finite element simulation

Neural Network based Fault Diagnosis Procedure for the Detector System of CFDF

This paper outlines and deals with the problem of fault detection, isolation and identification of the four-elements detector system attached to the Cairo Fourier diffractometer facility (CFDF) used for neutron time-of-flight (TOF) spectrum measurements. A feed forward neural network and error back propagation training algorithm are employed to diagnose four commonly occurring faults of the detector system: preamplifier, amplifier, discriminator and the high voltage. The diagnostic system processes the acquired data to determine whether the detector system state is normal or not. The experimental results showed that the trained network has the capability to detect and identify various faults which can make one of the detector units to be out of order.Facultad de Informátic