Open Access Original Research Article

Implication of Nanocomposite Edible Coating for Shelf Life Extension of Indian Olive (Elaeocarpus floribundus Blume)

Arkendu Ghosh, Koyel Dey, Arghya Mani, A. N. Dey, F. K. Bauri

Current Journal of Applied Science and Technology, Page 1-8
DOI: 10.9734/CJAST/2017/33111

Aims: To study the efficacy of nanocomposite edible coating on shelf life extension of Indian olive.

Study Design: Completely randomized design.

Methodology: We examined the effects of different concentration of guar gum as an edible coating on shelf life of Indian olives. There are five treatments and four replication viz. T1- Guar gum 0.5%, T2- Guar gum 1%, T3- Guar gum 1.5%, T4- Guar gum 2%, T5- Control. Different observations recorded are: loss in weight (LW), decay percentage, fruit length and breadth, Total soluble solids (TSS), Acidity, Ascorbic acid, Total sugar and reducing sugar.

Results: Investigation revealed that the highest results were obtained in T3 (guar gum 1.5%) in term of lowest LW% (16.85%) and decay percent (34.68%) along with preserving the chemical composition of the fruits whereas T5 gave lowest performance.

Conclusion: Among the different treatments, T3 (Guar gum 1.5%) appears adequate in significantly delay in all physico-chemical parameters during storage as compared to fruits under control.

Open Access Original Research Article

Study on Existing Livestock Manure Management Practices in Bangladesh

K. S. Huque, J. S. Khanam, S. M. Amanullah, N. Huda, M. K. Bashar, T. Vellinga, M. Fielding, K. Hicks

Current Journal of Applied Science and Technology, Page 1-10
DOI: 10.9734/CJAST/2017/34675

Livestock manure conventionally pollutes the environment and it may be turned into wealth through improved management. A survey research was conducted to determine existing manure management systems, their share in manure produced on farm and to quantify the extent of pollution through different systems. The commercial and subsistence farms of the humid and sub-humid areas under irrigated and rainfed regions of Bangladesh were selected for data collection using a pretested questionnaire through individual household visits. The extent of pollution by different system was calculated using IPCC Equation 10.23 and data were statistically analyzed using appropriate computer softwares. About 56.2 to 57.0% manure of large ruminants is kept in solid storage and 37.3 to 43.0% is used as burned fuel. Of the rest 4.80% is used in anaerobic digestion and 1.65% is lost as liquid slurry. The extent of manure used in solid storage was significantly (p<0.01) higher in commercial than subsistence farms irrespective of areas. The extent of burned fuel between the two farm types differed and it was significantly (p<0.05) higher in the commercial farm of sub-humid area but lower in humid and rainfed area. The methane emission factor of dairy & other cattle (bulls & growing animals), buffalo, small ruminants and poultry was calculated to be 6.77, 6.41, 5.42, 0.203 and 0.024 Kg CH4/head/year, respectively and the annual emission was estimated to be 62.98, 92.3, 7.97, 5.89 and 7.62 Gg methane, respectively. Farmers` unawareness and their weak capacity and credit problem are the major constrains to improved manure management.

Open Access Original Research Article

Determination of Gillnet and Hook Selectivity for Caranx heberi Captured off Kanyakumari Coast of India

A. Balasubramanian, B. Meenakumari, K. Dhanapal, P. Pravin, M. R. Boopendranath

Current Journal of Applied Science and Technology, Page 1-9
DOI: 10.9734/CJAST/2017/34630

Large meshed gillnets having mesh sizes of 13.5 cm, 14 cm, 14.5 cm and 15 cm and Hooks No.5,6,7 and 8 were chosen for determining the selectivity and fishing power of the gears  to  capture the larger carangidCaranx heberi of Kanyakumari coast of India. The catch data were analysed using the software GILLNET (Generalized Including Log-Linear N Estimation Technique) comprised of the methodology of SELECT (Share Each Length Class Total) by fitting various uni-normal models viz., normal scale, normal location, log-normal, gamma and bi-normal model. Models were tested using various selectivity parameters like Model Deviance, Dispersion Parameter and residual plots.  Bi-normal model was found appropriate for gillnet catch data while normal location for hook catch data despite over dispersion was common in both fits. The mesh size of 13.5 cm and hook No.5 and 6 were found as suitable mesh for capturing larger carangid.

Open Access Original Research Article

Enzymatic Response to Antioxidants and Seasonal Stress

Arindam Chakraborty, Anubha Baruah, B. C. Sarmah, J. Goswami, Arundhati Bora, D. J. Dutta, R. K. Biswas, Dhireswar Kalita, S. Naskar, Y. Vashi, Donna Phangchopi

Current Journal of Applied Science and Technology, Page 1-5
DOI: 10.9734/CJAST/2017/34343

The present experiment was conducted to study the activity of Superoxide dismutase (SOD) enzyme in the crossbred pigs (Hampshire × Local) under the agro-climatic condition of Assam. The experiment included a total of 36 numbers of crossbred weaned female pigs. Eighteen (18) animals were subjected to treatment separately during summer and winter. The selected animals were divided into three groups with six pigs in each group consisting of the control group (Treatment 1), one group was fed melatonin @3 mg/animal (Treatment 2) and the other group was fed Vitamin E @100 mg (Treatment 3) for both the seasons. The animals were maintained at AICRP on Pig, College of Veterinary Science, AAU, Khanapara, Guwahati-22.

Temperature-Humidity Index was calculated out from the data of ambient temperature and relative humidity by using standard formula. About 5 ml of blood was collected from each experimental animal aseptically at 15 days interval for the whole experimental period. The enzyme superoxide dismutase (SOD) was estimated by using SOD assay kit manufactured by Cayman Chemical Company, USA as per manufactures protocol.

The Temperature Humidity Index (THI) during the study period was indicative of thermal stress to the experimental animals in the summer (82.01±0.50) as compared to winter season (63.16±0.30). The serum SOD activity was found to differ significantly (P<0.01) higher between treatment and between season and also between treatment and season.

Open Access Original Research Article

Radiation Risk Assessment from Background Radiation Exposures in Selected Hospitals in South – South Nigeria

C. P. Ononugbo, I. E. Nwokeoji

Current Journal of Applied Science and Technology, Page 1-13
DOI: 10.9734/CJAST/2017/34239

Aim: This work was carried out to determine the radiation risk from background ionizing radiation exposures of selected hospitals in South-South, Nigeria.

Study Design: This study was purely an experimental work.

Place and Duration of Study: This study was carried out at University of Port Harcourt Teaching hospital (UPTH), University of Uyo Teaching hospital (UUTH) and Braithwaite Memorial Specialist Hospital (BMSH) between June, 2016 and February, 2017.

Methodology: The in-situ measurement of indoor and outdoor exposure dose rates of the three hospitals were measured with well calibrated radiation meters (Radalert-100 and Digilert-200) and Global positioning system (GPS) for exact position measurement. The radiation meters were set to measure the exposure rate in milli-Roetgen per hour. The measurements were carried out within the radiology department and some other departments of the hospital.

Result: The average indoor and outdoor exposure dose rates measured at University of Uyo Teaching hospital were 0.013±0.003 and 0.015±0.003 mRh-1, average indoor and outdoor exposure rates measured at the University of Port Harcourt Teaching hospital were 0.015±0.005 and 0.015±0.005 mRh-1 and the average indoor and outdoor exposure dose rates for Braithwaite Memorial Specialist Hospital were 0.014±0.003 mRh-1 and 0.013±0.003 mRh-1. The world standard threshold value for exposure dose rate is 0.013 mRh-1, the values show that University of Uyo Teaching hospital indoor are within this range, while the others are higher. The average indoor and outdoor absorbed dose rate for all the hospitals exceeded the world average of 89 nGyh-1. Also the results for average excess lifetime cancer risk (ELCR) calculated for indoor and outdoor for the hospitals show that ELCR for both indoor and outdoor exposures were all higher than the world acceptable value of 0.29x10-3, but the annual effective dose levels for the hospitals both indoor and outdoor were all below the 1 mSvy-1 maximum permissible limit for the public set by the International Commission on Radiological Protection (ICRP).

Conclusion: There is need for the management of the hospitals to monitor radiation levels in order to take necessary precautions to avoid radiation levels getting to unacceptable levels.

Open Access Original Research Article

Superluminal Hydrogen Atom in a Constant Magnetic Field in (3+1)-dimensional Spacetime (I)

Emmanuel D. K. Gazoya

Current Journal of Applied Science and Technology, Page 1-9
DOI: 10.9734/CJAST/2017/34194

In this paper, we have checked Stern-Gerlach experiment with the aim to study generic effect of an applied magnetic field onto transversely directed beam of hydrogen-like atoms. The ultrarelativistic phenomenon of spin of a Dirac particle (especially, electron spin) producing a continuum of linear angular momentum with the known result of superluminal propagation, suggests the feasibility of similar dynamics for a charged hydrogen-like particle under applied magnetic field, in spacetime. Another mechanism, very important but popularly less comprehensible, which sustains this linear momentum is known to be helical plane wave expansion. Hydrogen-like spherical waves cannot perform this function due to the perturbation caused by the successive random orientations of their atomic magnetic moment. It is therefore of vital import to investigate experimentally, as well as analytically, the possibility of transformation from hydrogen-like spherical wave expansion to its probable plane wave function, if we would extend our special subatomic theory of superluminal particles to the atomic (hydrogen-like) level.

Open Access Original Research Article

Analysis of Wide Band Unequal Cone Angle Biconical Antenna

Subba Rao Chalasani, Sudhakar Alapati

Current Journal of Applied Science and Technology, Page 1-8
DOI: 10.9734/CJAST/2017/34742

Radiation properties of biconical antenna of unequal cone angles have not been widely reported as compared to equal angle biconical antennas. Biconical antennas with cone of angle 90° have been widely reported. In this paper a compact biconical antenna with upper cone of 90° and lower cone of   120° angles are designed and analyzed for wide band applications from 1 GHz to 25 GHz.  A finite biconical antenna has limited bandwidth due to its abrupt termination at its edges to free space. Biconical antenna of top cone of angle 90° and bottom cone of angle 120° with edges terminated in thick circular conductor is proposed. Radiation characteristics and return loss of the antenna are investigated. Unequal biconical antennas direct their maximum radiation to narrow space between two cone surfaces and provide wide base for support. The proposed antenna is suitable for modern wireless communications in L, S, C, X, Ku and K band frequencies.