Identification of two strains of Paenibacillus sp. as indole 3 acetic acid-producing rhizome-associated endophytic bacteria from Curcuma longa

Curcuma longa is well known for its use as spice and medicine. The remarkable feature of the plant is the presence of rhizome, which provides an interesting habitat for association by various groups of bacteria. Some of these associated endophytic bacteria can have growth-promoting effects. In the current study, two species of endophytic Paenibacillus has been identified from the rhizome as indole 3 acetic acid producers. These isolates can thus have potential growth-regulating effect in rhizomes

Comparative analysis of PID and neural network controllers for improving starting torque of wound rotor induction motor

Unlike 3-phase squirrel cage induction motor, starting-up of 3-phase wound rotor counter part can be improved by adding an external resistance to the rotor circuit.Thus, leads to reduce starting current and increase starting torque. In this paper two controllers for 3-phase wound rotor induction motor have been proposed include conventional proportional integral derivative (PID)  controller and the other based on artificial neural network (NARMA-L2). A comparison between these controllers has been conducted. It has been shown that starting torque of the motor has been improved, when utilizing the neural network controller compared to the conventional counter  part. It should be noted that MATLAB/SIMULINK has been used to implement both controllers

Torsional Behavior of RC beams Strengthened by Near Surface Mounted-Steel Wire Rope Under Repeated Loading

In this paper, the torsional behavior of strengthened beams, which were subjected to constant and incremental repeated loads is studied. Repeated loads have a negative effect on the strength of beams as they reduce the beams resistance to external loads. External strengthening is usually used to increase the strength of beams for different applied loading. The near-surface mounted technique is a type of strengthening recently used to improve the strength of beams. The experimental program includes testing of twelve beams. All beams have the same dimensions and the same reinforcement. Nine of those beams are strengthened with different configurations of steel wire rope, and three beams are non-strengthened (reference beams). The results show that the decreasing of the spacing between wires (increasing the amount of steel wires) leads to an increase in the beam torsion strength and a decrease in the twist angle of beams. All strengthened beams show high resistance to the repeated load, especially constant repeated load, the increased torsional capacity has reached to 181.12% in beams under constant repeated load compared to the related beam subjected to monotonic load

Improving the performance of the direct and indirect evaporative cooling system: A review

The energy-efficient and ecologically friendly cooling method known as evaporative cooling is very common. When water evaporates, cooling the air, a significant quantity of heat is transported from the air to the water, lowering the air's temperature. This process is known as evaporative cooling. In order to reduce energy consumption and provide adequate cooling comfort, this paper analyzes the most significant evaporative cooling advancements and technologies

Simulation model of ANN and PID controller for direct current servo motor by using Matlab/Simulink

In the current era, researchers have been active in confirming and achieving their work through simulation using the computer program Matlab, in addition to the comparison between different control methods is also one of the prevailing behaviors, and the focus has been on the use of electrical machines in industry through multiple applications. Researchers in this study selected type of electric motors and two types of control systems for comparison, and to verify the possibility of improving the system’s work performance through the simulation results, the process of achieving the objectives of the current research is carried out. This paper presents using conventional proportional-integral-derivative (PID) controller and artificial neural networks (ANN) with direct current servo motor (DCSM) in order to obtain good performance characteristics because of efficient and widely use of this motor in the fields of control. The motor model in addition to the controller is built using Matlab simulation software. A comparison was made between these controllers (PID and ANN), where the simulation results indicate that the neural networks being developmental in the process of simulating the operation of the servo motor type and got good performance and better results from the traditional real-time console use case

Challenges of IEEE 802.11a technology and improving its performance using diversity technique

In this technology, information can be transmitted through the air without the need for cables, wires, or other electronic connectors, using electromagnetic waves such as infrared, radio and satellite frequencies. In this research, the most important challenges and problems faced by wireless communication systems were identified and how to solve and address them. (IEEE 802.11aWLAN) was also simulated and tested using Mat lab program, where the signal generated in (IEEE 802.11aWLAN) was examined in the form of orthogonal frequency division multiplexing (OFDM) modulation by examining the performance of the bit error rate of this system using diversity technology to improve the performance of this system where we adopted the reception diversity technology, In the case of line of sight (LOS) channel and multipath channel using maximal ratio combining (MRC) method. We notice that the use of the MRC receiving diversity technique in the system reduces the bit error rate and increases the efficiency of the system and the performance improve with increase the number of receiving antenna with gain 6 dB

Incidence of tennis elbow and association of hand grip strength among college students

Background: Lateral epicondylitis is an overuse injury involving the origin of common extensor tendon at elbow joint. Among the college students there is more complaint on wrist and elbow. Objective was to find out the incidence of tennis elbow & grip strength among the students during the entire academic year.Methods: Three hundred and seventy subjects fulfilled the inclusion criteria with age respondents between seventeen to twenty four years. This study is done in those students who have local tenderness on palpation over the lateral epicondyle (grade 2). NPRS was used for measuring the pain intensity. Mill’s test and Cozen’s test was performed to confirm the tennis elbow. The subject is asked to squeeze the dynamometer three times with left and right hand respectively. There was one minute resting period between each squeeze were taken into account.Results: The incidence of confirmed tennis elbow was 4.05% & 2.70% in right and left respectively. Among those participants Mill’s test was positive in 16.2% on right and left side and Cozen’s test was positive in 8.1% on right side and 5.4% on left side. The mean rank of left and right grip strength for the students who are confirmed as tennis elbow were 52.75 Kg and 50.67 Kg and for not-confirmed were 36.56 Kg and 36.41 Kg respectively.Conclusions: The study concluded that 6.7% incidence rate of tennis elbow was observed in college students during the entire academic year. And also concluded there is no much significance correlation between grip strength and tennis elbow incidence rate

Is there a role for melatonin in fibromyalgia?

Fibromyalgia, characterised by persistent pain, fatigue, sleep disturbance and cognitive dysfunction, is a central sensitivity syndrome that also involves abnormality in peripheral generators and in the hypothalamic pituitary adrenal axis. Heterogeneity of clinical expression of fibromyalgia with a multifactorial aetiology has made the development of effective therapeutic strategies challenging. Physiological properties of the neurohormone melatonin appear related to the symptom profile exhibited by patients with fibromyalgia and thus disturbance of it’s production would be compatible with the pathophysiology. Altered levels of melatonin have been observed in patients with fibromyalgia which are associated with lower secretion during dark hours and higher secretion during daytime. However, inconsistencies of available clinical evidence limit conclusion of a relationship between levels of melatonin and symptom profiles in patients with fibromyalgia. Administration of melatonin to patients with fibromyalgia has demonstrated suppression of many symptoms and an improved quality of life consistent with benefit as a therapy for the management of this condition. Further studies with larger samples, however, are required to explore the potential role of melatonin in the pathophysiology of fibromyalgia and determine the optimal dosing regimen of melatonin for the management of fibromyalgia

Electronic Circular Dichroism Spectroscopy of Proteins

Circular dichroism (CD) is an important spectroscopic technique that enables the characterization of protein secondary and tertiary structure. Proteins can undergo changes in their structure when they participate in processes, for example, ligand binding. CD, therefore, can be used to monitor secondary and tertiary structural changes when a protein (receptor) binds to a drug molecule (ligand).This review describes experimental studies of protein CD and theoretical and computational methods that compute spectra from structure or structure from spectra. CD is a technique that can be used to complement X-ray, NMR, and ultraviolet-visible (UV-vis) experiments on biomolecules and proteins, all of which can be assisted by molecular modeling, which has the capability of computing CD from first principles. A combination of experimental CD and molecular modeling has the capacity to greatly enhance future multi-disciplinary research to expand our knowledge of the structure, function, and dynamics of proteins

EXPLORATION OF ACTINOMYCETES ENDOPHYTICALLY ASSOCIATED WITH PIPER NIGRUM FOR POTENTIAL BIOACTIVITY

Piper nigrum is well known for its metabolite richness. So endophytic microorganisms that reside within such environments can be expected to have promising biosynthetic potential. The current study identified three endophytic actinomycetes with broad bioactivity which can have applications in natural product related pharmacological research. The Verrucosispora sp identified in the study was found to have promising anticancer and antimicrobial activities and Streptomyces sp. was found to have antioxidant activity. The results obtained are supported by many previous reports and this suggests the isolates obtained in the study to have the possible presence of potential known or novel compounds with broad spectrum of activity.</jats:p