DEVELOPMENTAL STUDY OF SCHIZOTHORAX PLAGIOSTOMUS FROM PRE TO POST HATCHING. (02 May 2008) The Schizothorax plagiostomus (Heckel) is a particular valuable fish in Garhwal Himalaya and natural stocks are low mainly because of over fishing, erosion and shrinkage of different tributaries. The main purpose of this study is to describe development of the Schizothorax plagiostomus reared in laboratory, particularly ontogeny of digestive system because this may important for the establishment of an appropriate ontogenetic feeding schedule.
Preparation of Ti/SnO2-Sb2O4 photoanode by electro-deposition and dip coating for photoelectrocatalytic application (30 Apr 2008) Abstract:Thin films of antimony doped SnO2 on titanium substrate were prepared by electro-deposition and subsequent dip coating technique using SnCl4 as precursor with the various antimony doping levels ranging from 1.5 to 8mol%. The film photoanodes were used in photo-degradation of phenol in order to measure their catalytic performance. Their photocatalytic(PC) activity, photoelctrocatalytic(PEC) activity, electrocatalytic(EC) activity were evaluated in the degradation processes. The effect of annealing temperature on the thin film PEC activity was also studied. The experiments confirmed that the SnO2 thin film with a Sb-doping level of 6mol% shows a favored PEC efficiency and light absorption ability, and the 450℃ is a favorite temperature for heat treatment of photoanode. A set of compared tests with different photoanodes indicated that Sb-doped SnO2 photoanode expresses a good PEC character and can be a promising photoanode for PEC water treatment. The degradation experiments also demonstrated that PEC process has more removal rate than PC process and EC process.
Keywords: antimony doped SnO2; photoanode; photoelectrocatalysis; phenol
''Analysis of formation of silicon nitride on Si(100) by electrochemical anodization'' (25 Apr 2008) abstract
Using electrochemical anodization technique, the silicon nitride ( Si3N4 )thin film has been deposited on the p-type Si(100) substrate at the ambient temperature. Very thin nitride passivation of Si(100) stabilizes its surface or interface very well and reduces the interface states density. However, the passivated surface exhibits a substantial degradation due to the exposure to air after passivation. In this study, silicon nitride thin film have been deposited via electrochemical anodization on the Si(100) surface. Both analysis of formation of silicon nitride (Si3N4) on the p-Si(100) and substrate Si(100) have been made by Fourier transform infrared (FTIR) spectroscopy, Raman spectrometry, respectively. The Si-N asymmetric stretching characteristic peak of Si3N4 films has been observed by FTIR. Crystalline silicon has been observed by Raman spectrometry. The atomic force microscopy (AFM) have been used to carry the morphological properties of the deposited films. Surface degradation was investigated with the high-resolution X-ray diffraction (XRD) technique.
Keywords: Electrochemical anodization; Si3N4; FTIR; Raman spectrometry; AFM, XRD.
*Corresponding author. Tel.:+90-274-265 20 31
fax: +90-274-265 20 56
E-mail address: szeyrek@dumlupinar.edu.tr (S. Zeyrek)
Modified Adomian decomposition method for solving nonlinear oscillatory system (23 Apr 2008) In this paper, an efficient modification of
Adomian decomposition method is introduced for solving nonlinear
oscillatory equations of the form
$$y^{''}(x)+cy^{'}(x)+\epsilon y(x)=f(x,y).$$ The proposed method
can be applied to linear and nonlinear problems. The scheme is
tested for some examples and the obtained results demonstrate
efficiency of the proposed method.
Commercially Important Microorganisms from Insects (12 Apr 2008) Microorganisms produce industrially and commercially important compounds in the form of secondary metabolites. Most microorganisms surrounding us are still unknown and is likely to have significant and unpredictable economical consequences and effects on health. Insects are among the most successful animals of the world in terms of species richness as well as abundance. Their biomass exceeds that of mammals by far. Microbes within the insect gut are known to be important in break down, mineralization and cycling of a range of organic compounds. In search of new genera of microbes capable of producing some novel compounds, insect samples were collected and bacterial populations were screened. Micro flora inhabiting the gut of insects were found to be elaborating amylase, protease, phosphatase, lipase and L - asparaginase.
Key words: Insects, amylase, protease, phosphatase, lipase, L – asparaginase.
Impact Testing (27 Nov 2007) The objective of this experiment is determine the functionality of the IZOD impact testing machine, and determine the Stress that a notched piece of low density carbon steel could handle under the load before it bends and becomes plastic under sheer load.
Calorimetry (27 Nov 2007) The object of this experiment is to demonstrate knowledge of the Calorimeter and its function while discussing the endothermic and exothermic reaction of a material.
Ultrasonographic and Doppler imaging in the Diagnosis metastasia nodules of Gestation Trophoblastic Tumor in abdominopelvic cavity (14 Nov 2007) Objective. To review clinical data of metastasia nodules of gestation trophoblastic tumor (GTT) in abdominopelvic cavity by color Doppler ultrasonography. Methods. A retrospective analysis of 13 cases of GTT seen in china was performed. Clinical appearances, Ultraultrasonographic findings, Doppler waveforms, and patient outcomes were followed-up. Color Dopplerultrasonography were performed to diagnose the presence of GTT, detect metastasia nodules in abdominopelvic cavity, assess disease recurrence, and monitor the efficacy of chemotherapy. Results. Among the 13 patients with GTT, 9 had an invasive hydatidiforn mole(IHM), 4 had choriocarcinoma. In cases of choriocarcinoma, 1 cystic vascular space near the uterus, 1 colonic metastasia node, and 2 metastasia node near uterus were shown. Cases of IHM, 3 had cystic vascular space near the uterus, 1 had colonic metastasia node, 2 had side wall metastasia node of pelvic cavity, 1 had right renal metastasia node, 1 had metastasia node of abdominal cavity, and 1 had metastasia node near uterus. The diameter of metastasia nodules was 4.9cm(SD, 1.35). Doppler waveforms showed resistive indices of 0.31(SD, 0.08) for 4 choriocarcinoma metastasia nodules, 0.35(SD, 0.05) for 9 IHM metastasia nodules. Except an IHM with the renal metastasia node, abnormal ultrasonographic and Doppler findings in other metastasia disease disappeared when chemotherapy was successful. Conclusions. ultrasonography and Doppler imaging were helpful in diagnosing GTT, in detecting metastasia nodules except uterus and ovary, and in following the effectiveness of chemotherapy.
maize hybrids under stress and irrgated conditons (04 Nov 2007) maize hybrids which are produced by crossing six lines and four testers under line * tester fashion and the resulted 40 hybrids were grown under normal condition and under stress condition to identify the best hybrids for both as well as for the individual condition with commercial checks of M-900, and CoH5(M)hybrids.
