Sergio G. Salinas-Rodríguez, Juan Arévalo, Juan Manuel Ortiz et al.

Microbial Desalination Cells for Low Energy Drinking Water • 2021

Abstract This chapter presents desalination as one of the technologies to alleviate water scarcity and its contribution to the sustainable development goals. An overview of the world and regional desalination capacity is presented and areas where desalination has potential for development are identified. The overall concept of the microbial desalination cells is presented and the areas where key innovations were developed is presented. A discussion on the energy costs and production costs in seawater reverse osmosis is briefly discussed.

Nuran Temelli, Simon van den Akker, Ruud A. Weusthuis et al.

Microbial Biotechnology • 2025

ABSTRACT In many microbial biotechnology processes, biomass itself is not the product of interest, but rather targeted chemicals or proteins. In these processes, growth should be limited to direct more substrate to product and increase process yields. Under growth‐limiting conditions, such as nutrient limitation, microorganisms, including the yeast Saccharomyces cerevisiae , activate a general stress response (GSR). Different hypotheses have been formulated for this activation, including a preparatory role for future stresses or a role in cellular protein density. Here we tested a third hypothesis: the GSR reduces the energy needed to maintain cellular homeostasis, also known as the maintenance energy requirement (MER). The impact of GSR on MER was investigated by assessing the effect of the absence of its key regulators, Msn2 and Msn4, on energy‐substrate distribution and stress resistance. Chemostat and fed‐batch cultures revealed significant increases in MER of up to 85% in the deletion strain compared to the parental strain. In contrast, maximal biomass yields, growth rates and morphology were unaffected. Our insights highlight an additional role of the GSR, namely saving cellular energy. As the MER is a key determinant of product yields and in process design, especially in low growth processes, our findings can help to optimise microbial bioprocesses.

[object Object], [object Object], [object Object] et al.

5th International Scientific Conference on Microbial Biotechnology • 2022

Polyethylene, a highly recalcitrant and inert synthetic material and thereby very difficult to degrade in the environment has become a major source of environmental pollution. The traditional methods for plastic waste dispose are recycling, incineration, and landfilling, the oldest and most common method of plastic waste disposal. The natural degradation of low-density polyethylene (LDPE, PE-LD) depends on polymer properties, its high molecular weight, hydrophobic nature and lack of functional groups, recognized by microbial enzymes makes it adverse towards degradation. However, several studies have reported the polyethylene degrading microorganisms isolated from waste disposal sites. Various species of bacteria and fungi or microbial communities, isolated from soil, are able to modify and consume the plastic polymers as a source of energy. The purpose of present study was to characterized microbial consortia isolated from the surface of LDPE films extracted from the soil contaminated with polyethylene. LDPE films were placed in the soil that was collected from the landfill, located near the village of Slobozia-Duşca, the Criuleni district, the Republic of Moldova. The soil was treated under aerobic and anaerobic conditions within six months. Fungal and bacterial strains were isolated from LDPE surface, through enrichment techniques. Enrichment cultures were prepared by adding 10 mL water sample to 90 mL mineral salt medium (MSM). At the initial stage of creating consortia in the culture media was added LDPE in the form of granules, in an amount of 1 g. As a growth inducer in the media was added glucose, in a concentration of 0.1 mL. Samples from the enrichment culture were serially diluted and plated onto MSM agar, nutrient agar, Czapek medium. Bacterial isolates were then allowed to grow by incubating the plates at 28°C for five days. Growing colonies were selected and streaked successively onto the same media for purification. The isolates were examined for their Gram reaction, endospore formation, and cultural characteristics, such as colour, colony form, margin, surface, and elevation. The data obtained show that after 100 days of cultivation the microorganisms in the consortia retain their viability, the titer being from 7.00 × 106 CFU/mL, up to 32.00 × 106 CFU/mL. The consortia obtained are composed predominantly of fungal strains, and micromycetes are mostly represented by the genus Trichoderma. The bacteria were determined only in 2 consortia, out of the 6 obtained, and were represented by species from the genera Bacillus, Pseudomonas, Streptomyces.

M. Jacoby

Chemical & Engineering News Archive • 2006

"TODAY YOU HAVE THE opportunity to define the new basic research agenda for disciplines that underpin advanced nuclear energy systems. Think boldly and broadly, and don't be bound by yesterday's technology or even today's technology." With those words, Patricia M. Dehmer challenged a roomful of nuclear scientists and engineers from the U.S. and other countries to identify key areas of science in which fundamental research has the potential to make a significant impact on the future of nuclear power. The setting, a Department of Energy nuclear energy workshop held last month in Washington, D.C., was one of a series of workshops coordinated by DOE's Office of Basic Energy Sciences (BES), which is headed by Dehmer. The goal of the meeting was to produce a report that itemizes the priority research directions needed to address what Dehmer referred to as "short-term showstoppers and long-term grand challenges" for effective utilization of nuclear energy. Dehmer noted that during ...

Z. Vardeny

• 2007

The workshop, Fundamental Research Needs in Organic Electronic Materials, jointly sponsored by DOE Basic Energy Sciences (BES) and EERE/BT was held on May 23-25, 2003 at the University of Utah Campus in Salt Lake City, Utah for the purpose of identifying key scientific issues enabling the technological success of these materials. Approximately thirty key experts and world leaders in organic materials chemistry, transport physics, time-resolved and steady stated optical processes, organic spintronics, and device technology, gathered to stimulate new and revolutionary sciences.

Khaldoon Alfaverh, L. Számel

2022 IEEE 5th International Conference and Workshop Óbuda on Electrical and Power Engineering (CANDO-EPE) • 2022

In the last few years, the price of battery energy storage (BES) technology (e.g. Lithium-Ion) has fallen tremendously and the cost of generating electricity from renewable energy sources has also decreased, and the trend is increasing. Therefore, the challenge to integrate the low-cost renewable electricity and low-cost storage to compete with conventional electricity generated from fossil fuels is the focus in recent research where BES is the key solution for this challenge. In this paper, the integration of BES into an isolated microgrid (MG) is investigated. This paper study the impact of a BES system on the frequency deviation as one of the critical applications to maintain grid stability considering the main characteristics of the BES and under different disturbances scenarios in an islanded MG. Overall, this paper introduces an open modular framework for future work on the performance of BES technologies from the technical aspect of different grid applications.

Zhouhanyu Shen, Jinghan Ouyang, Yue Cheng et al.

Proceedings of the 2023 4th International Symposium on Artificial Intelligence for Medicine Science • 2023

Objective: The exact effect of overt hepatic encephalopathy (OHE) on the neural processes involved in cognitive enhancement after liver transplantation (LT) is not currently known and requires additional study. The study aims to probe into whether the causal influences within the default mode network (DMN) are altered in OHE patients after LT using resting state functional MRI (rs-fMRI) data. Materials and Methods: In this study, a total of 21 cirrhotic patients with OHE were included. Each patient underwent rs-fMRI scans both prior to and one month post LT. Four regions of the DMN (medial frontal cortex (MFC), posterior cingulate cortex (PCC), left parietal cortex (LPC), and right parietal cortex (RPC)) were defined for each patient using a group independent component analysis (ICA) approach. Spectral dynamic causal modeling (DCM) was employed to estimate the coupling parameters. The coupling parameters provide insights into the directional and strength of the interconnections between the DMN regions, which represent the causal interactivities among the regions. Results: After one month of LT, the influences from the PCC to RPC, RPC to PCC and from LPC to MFC are markedly reduced. Conclusion: The findings indicate that the disrupted causal influences including RPC exerts on PCC, PCC exerts on RPC and LPC exerts on MFC are responsive for cirrhotic patients with OHE to operate LT. And these changes in the effective connectivity have the potential to be utilized as neuroimaging biomarkers, aiding in the assessment of cognitive function restoration post LT in patients with liver cirrhosis.

Léopold Mottet, Domitille Le Cornec, Jean-Marc Noël et al.

Soft Matter • 2018

Tailoring a conductive composite hydrogel, shaped as beads or liquid core capsules, allows to probe the electroactivity of bacteria.

Sara Gamrot, Bartłomiej Tworek, Krzysztof Piskorz

Journal of Kinesiology and Exercise Sciences • 2025

Background: Low back pain is a significant medical and socioeconomic problem. The pain is often caused by abnormal work and increased tension of the erector spinae muscle. Effective pain management has become very popular in recent years. Physiotherapists are increasingly using a holistic concept of human cognition in their therapies, which involves the interdependence and coordination of the entire body. Methods: The study involved 36 students, each of whom underwent a single session of deep tissue massage of the hamstrings muscles. The Thomayer test was used to assess the flexibility of these muscles, while changes in the bioelectrical activity of the erector spinae muscles were evaluated using the NORAXON EMG device, which took into account the protocol developed for this purpose. Results: A single session of deep tissue massage of the hamstrings muscles showed statistically significant changes in the results of the Thomayer test. The average bioelectrical activity of the erector spinae muscle in the resting standing position decreased both in the treated and untreated side showing statistically significant changes. During flexion on the treated side, a statistically significant decrease in muscle activity was observed, which was not observed during extension. Conclusions: Deep tissue massage of the hamstring muscles positively influenced the ability to reach the floor with fingers with straightened knees, which could have resulted from the increased flexibility of the hamstring muscles. This therapy may be an effective complementary form of treatment for trigger points in the hypertonicity of the erector spinae muscle. Researchers who intend to explore this topic are recommended to include control groups in their studies and to implement a series of therapeutic sessions.

D Lkhamsaizmaa, Ts Byambajav

Mongolian Journal of Agricultural Sciences • 2014

We determined purposely the "Gastrovit" preparation influence results from Badaan (Bergena crassifolia L.) and Seabuckthorn (Hippophae rhamnoides L) in the bioelectrical activity of rat’s stomach during acetic acid ulcer models of gastric. On the 7th , 14th and 21st days of treatment were compared with healthy plumbing. By take of 50 mg/kg of this preparation there had been increased overall bioelectrical activity of the stomach by 1.78-1.88 (P<0.05), the pulse frequency of the stomach by 1.04-1.29 (P<0.05), and the mean amplitude of the stomach by 1.26-1.44 (P<0.05) is shown that it has a gastro protector activity. DOI: http://dx.doi.org/10.5564/mjas.v11i2.208 Mongolian Journal of Agricultural Sciences Vol.11(2) 2013 pp.13-16

Department ofChemical Engineering, Institute of Technology-Dire Dawa University Dire Dawa, Ethiopia., Gebrihans Haile Gebrewbet*, S. Ram Mohan Rao et al.

International Journal of Innovative Technology and Exploring Engineering • 2020

From time to time researcher developed different types of electricity generating device s. Because electricity and home lighting are considered essential for a country’s economic and social developments. GH24 bio generator is a device that converts the chemical energy of waste organic compound into electricity (light) using naturally occurring microorganisms found within the waste. 40 cm height, 20 cm width, 60 cm length, and 3.5 Kg mass prototype was developed. The prototype was composed of four reactor chambers, sample inlet pipe, bridge, gas outlet pipe waste disposal pipe and upper and bottom protective layer. The greenness, simple operation and effective design are characteristic of the devices. Prototype testing was performed using a liquid dough as a sample. A maximum of 3.403 V was generated when the GH24 bio generator prototype operated with 3.5 L of waste liquid dough sample. This renewable energy is given light for 10-12 hr. using one light bulb. The device could be used as an important source of light for people living in off-grid access to electricity area. Other benefits of the device is used to minimizing the health and environmental impact of fuel-based lamps by replaced it.

ASM Failure Analysis Case Histories: Power Generating Equipment • 2019

Abstract Turbine buckets in a 37.5-MW gas turbine made of Udimet 500 superalloy failed in service. The power plant was located 1 km (0.6 miles) from the Pacific Ocean and operated on No. 2 diesel fuel, which was supplied by tanker ship. Turbine bucket failures occurred on three units after 2500 to 6400 h of operation. Investigation (visual inspection, metallographic examination, and stress analysis) supported the conclusion that the differing microstructure of the airfoil resulted in changes in mechanical properties. Because normal operation includes cycling of loads and temperatures, the shroud tip fractured due to thermomechanical fatigue in its degraded state. Recommendations included special chromium or silicon-rich coating to minimize corrosion in gas turbines operating in a marine environment with operating temperatures in the range of type 2 corrosion (650 to 750 deg C, or 1200 to 1380 deg F). Additionally, it was suggested that fuel delivery, handling, and treatment be high quality, to maintain fuel contamination within design limits, and inlet air filtration must be designed for the coastal site. Also, changing the bucket tip by increasing its thickness and changing the casting technique would reduce the stress and make the design more tolerant of corrosion.

S. Keerthini, R. Kapilan, S. Vasantharuba

Research Square • 2021

Abstract Background Probiotic, Lactic Acid Bacteria (LAB) are consumed by human through the traditional food products for several decades due to their beneficial health effects. LAB is Gram positive, non motile bacteria that produce antimicrobial peptides for their defense mechanism. Among the antimicrobial peptides, Bacteriocins are widely investigated because of their possible utilization in food sector especially food security actions, where bacteriocin kills or inhibits the growth of other bacteria. Usage of metabolic products of LAB and LAB are generally recognized as safe. Therefore, this study was aimed to isolate LAB species that produce bacteriocin showing wide spectrum antibacterial activity. Results Lactic acid bacteria were isolated from yoghurt, curd, dosa batter, idli batter and soaked and ground rice batter using (De Man, Rogosa and Sharpe agar) MRS agar and incubated at room temperature (30±2ºC) for 24-72 h aerobically and anaerobically. When agar well diffusion method was employed to detect the antibacterial activity of the twenty five isolates against food spoilage organisms ( Enterococcus faecalis , Staphylococcus aureus, Pseudomonas aeruginosa , E . coli , Klebsiella pneumoniae , Serratia marcescens , Salmonella sp., Proteus sp., Micrococcus sp., and Bacillus sp.,). Three bacterial species showing broad spectrum of antibacterial activity, were identified and characterized by biochemical and molecular methods. The wide spectrum antibacterial bacterial species were identified as Lactobacillus reuteri AF182723 isolated from curd, Lactobacillus rhamnosus AY299488 isolated from rice batter and Lactobacillus acidophilus AF182726 isolated from yoghurt. Among all the isolates, Lactobacillus reuteri AF182723 showed significant wide spectrum antibacterial activity against diverse Gram positive and Gram negative bacterial species. Conclusion The production of bacteriocin from Lactobacillus reuteri AF182723 and incorporating it in the food would inhibit the food spoilage organisms. Usage of this bacteriocin at appropriate concentration in food needs to be studied further.

Yulia Ningsih, Lalu Zulkifli, Mahrus Mahrus

Jurnal Biologi Tropis • 2022

This study aimed to isolate endophytic bacteria from cashew plant roots, and to determine their ability to dissolve phosphate and produce IAA. This research was conducted at the Microbiology Laboratory of the Faculty of Medicine, University of Mataram. This research was conducted by isolating the endophytic bacteria of cashew nut root and then testing the phosphate solubilizing ablity and testing the potential for IAA-producing bacteria. Based on the results of the study, there were 7 isolates of endophytic bacteria, all of which were able to solubilize inorganc phosphate with a low phosphate solubility index, ranging from 1 to 1.7. Of the 7 isolates, there were 2 isolates that were able to produce IAA, namely AJM 7 and AJM8 isolates with IAA concentrations ranging from 16 to 18 ppm. Based on the results above, it can be concluded that the endophytic bacterial isolates from the roots of the cashew plant have the potential to be a candidates for biofertilizer formulation.

Yuttachai Keawsuntia, Cheevin Limsiri, Thamrong Prempridi et al.

Applied Mechanics and Materials • 2011

Solar updraft tower is an alternative technology for electricity generating from solar energy. It’s suitable for use in remote area, where there is high potential of solar radiation, because the constructions are cheap and the technologies involved are conventional. From the study of small scale solar updraft tower by using the computation fluid dynamics program and experimental, show that the hot air velocity in the solar updraft tower from the computation fluid dynamics program similarly with the experimental data. From this study, the small-scale solar updraft tower with 72 m length in each side of solar collector, air inlet height of 0.5 m above the ground, an updraft tower of 30 meter high with 1.2 m length of each side was studied to determine the performance. It was found that the electricity generating from this model was 6893 W/day, enough to supply electricity for up to 13 families of small community in the rural area.

Dietmar W. Rose, Karen P. Olson

Journal of Forestry • 1979

Abstract North-central Minnesota, with large surpluses of timber in public ownership, offers potential for commercial generation of electricity in small wood-fueled plants. Analysis indicates that under some conditions such installations would be competitive with fossil-fueled plants and would add substantially to the social and economic well-being of the depressed northern part of the state.

Abdel Rahim Khalid Abdel Naser

Annals of Civil and Environmental Engineering • 2022

A new design system is introduced to generate clean eco-friendly electricity from rain fall water. The majority of traffic roads in the world has constructed water ditches for one aim. This is for the accumulation of rain fall water from the roads.

Bo Hai Jiang, Jiang Ping Mei

Advanced Materials Research • 2012

Propose a new type of stand-alone movable wind-solar mutually complementary electricity-generating system with oxygen and water rationing function.The system integrates the wind and solar power systems,control systems and the user load equipments into a movable military square cabinet.It can be an effective solution to the problem of electricity supply for remote areas such as the field of military camps,the plateau and the island.This paper introduces the structure principle of the system and the manner of working,and also briefly describes its data acquisition system and control management process.

Ken Yeang

Architectural Design • 2008

Abstract With the depletion of slavery ‐ large‐scale free, if not cheap, manpower ‐ the potential of human force as a major source of energy was forgotten. Here Ken Yeang flags up how some important new research by scientists from universities in Canada and the US has heralded the development of wearable devices that harvest human energy. Copyright © 2008 John Wiley & Sons, Ltd.

Simon Theuri Njenga, David Nzuki

The International Journal of Humanities & Social Studies • 2023

Kenya continues to face challenges regarding the actualization and timely implementation of electricity generation projects aimed at increasing the electricity capacity required in the quest for attaining industrialization status by the year 2030. Out of the projected flagship electricity generation projects, less than 20 percent of the projects had been translated into the national grid by the end of the year 2022. Such trends call for an in-depth study of project dynamics that determine the performance of electricity generation projects. To research the problem, the focus was given to Kenya Electricity Generation Company (KenGen) Plc, which is a state-owned electricity generation company accounting for 60 percent of the electricity generation market share in Kenya. The purpose of the study was to determine the project management dynamics that determine the performance of electricity generation projects. Specifically, the study sought to evaluate the influence of project financing, project procurement, organization dynamics, individual dynamics and stakeholder management dynamics on the performance of electricity generation projects in KenGen. The study was anchored on system theory, constraints theory, and competence theory of project management. The earmarked population was 10 electricity generation projects implemented by sixty-eight employees who had formal project management appointments in the power plant construction projects that ranged from hydroelectric, geothermal, thermal and wind generation modes. A census survey method was used, targeting the sixty-eight respondents. Descriptive and inferential statistics were used to analyze the data. Multiple regression analysis was used to determine the relationship between the variables. The study established that all the independent variables had positive regression coefficients, indicating that a unit rise for each independent variable facilitated a consequent rise in the dependent variable. However, only finance dynamics revealed a statistically significant effect, indicating that project finance dynamics had a significant effect on the performance of electricity generation projects. The study recommended that priority should be given to finance dynamics while scoping the electricity projects above other project dynamics. Financial analysis of the project financier's capacity to ensure uninterrupted project milestones financing was identified as an aspect requiring consideration in project financing. This outcome will be helpful to stakeholders in the energy sector, academicians and electricity project financiers. Suggestions were made for further studies on other financial dynamics not accounted for in the study and non-financial dynamics that were not established to have a significant effect on generation projects

Yuttachai Keawsuntia

Applied Mechanics and Materials • 2013

A small multi-blade wind turbine is an alternative technology in order to electricity generating for use in a household because of the construction is cheap. From the study, the performance calculations by simulation program show that a number of blade at 12 blades is the optimum value for applying to this wind turbine that give maximum power coefficient of 0.29 at a tip speed ratio of 1.2. The results from the test run of wind rotor connected with generator in the wind tunnel at a wind velocity of 2 m/s, 3 m/s and 4 m/s, the system give the electric power of 2.5 W, 4.25 W and 4.49 W respectively.

T. Morosuk, G. Tsatsaronis, S. Tesch

Volume 6A: Energy • 2013

This paper discusses the thermodynamic performance of three different system configurations used to expand natural gas from a pressure of above 40 bar to a final pressure of approximately 12 bar: (1) System in which all natural gas passes through a throttling valve, (2) system that uses only an expander as the expansion device, and (3) system using in parallel both an expander and a throttling valve as expansion devices. The sensitivity analysis demonstrates how the mass flow rate of natural gas and the seasonal fluctuation of the ambient temperature affect the thermodynamic efficiency of these systems.

John Donaldson, R. Davies, H. Roberts

Managerial Law • 1974

March 5, 1973 Industrial Relations — Unfair industrial practice — Discrimination — Members of non‐recognised union — Nomination for election to works committee — Election restricted to recognised unions — Validity of nominations — Whether restriction to “discriminate against” workers — Industrial Relations Act, 1971 (c.72), s.5(2),(4).

Arkadiusz Garwol

Journal of Konbin • 2024

The purpose of this paper is to present the most commonly used types of photovoltaic panels and principles of their operation. Mono- and polycrystalline cells are presented, with their advantages and disadvantages indicated. The following section describes the process of obtaining electricity by using the photovoltaic and thermoelectric phenomena occurring in cells. Then, the structure and principle of operation of dye cells, thin-film cells and fourth-generation cells were presented on the example of cells using the Schottky junction to generate energy. The article also presents the method of obtaining single crystals of silicon, developed by Jan Czochralski, who lived at the turn of the 19th and 20th centuries. The method he developed laid the foundations for the development of modern integrated circuits - it was a milestone in the development of electronics.

Ibrahim Yuksel, Omer Yuksek, Hasan Arman

Renewable Energy - Technologies and Applications • 2021

The aim of this chapter is to provide that hydroelectric energy production in Sakarya and Eastern Black Sea Basins which are selected as pilot region in Turkey. Hydroelectric energy has an important place in energy sector is generated from 26 main Basins in Turkey. Sakarya and Eastern Black Sea Basins are very important water resource in Turkey. In this study, hydro energy potential for electricity generating has been investigated in Turkey and hydro energy potential determined for the selected small streams in the Sakarya and Eastern Black Sea Basins by using hydro energy calculating methods.

MARK HALLILEY

Journal of Financial Regulation and Compliance • 1993

The privatisation of the electricity industry was badly flawed. It created a generating duopoly in the form of National Power and Powergen. These two companies have a degree of control which is incompatible with the concept of the open market and which is detrimental to the interests of the consumer. Given the power of that duopoly, it is doubtful whether the Governmental regulatory authority, OFFER, can effect real change without a referral to the Monopolies and Mergers Commission.

Yuttachai Keawsuntia

Advanced Materials Research • 2013

This research paper presents the testing results of the electricity generating from the pico hydro generator, for save in a battery 12 V. A testing of pico crossflow turbine with 0.6 m diameter of wheel and a 20 blades water turbine which has a semi-circle shape at 0.1 m diameter of blade, connected with the generator at gear up ratio of 1:3 and 1:5 respectively, was undertaken. The results from the test run of pico hydro generator by varying flow rate from 60 to 120 L/min at 0.0127, 0.0190 and 0.0254 m diameter of nozzle respectively, showed that the gear ratio between the water wheel and the generator, the diameter of nozzle and the volume flow rate are important variables that affect the electric production. A combination of water flow rate at 120 L/min, 0.0127 m diameter of nozzle and gear ratio of 1:3 gives the maximum electric power of 121.68 watts.

Shuai Yang

Research Square • 2021

Abstract In the past scientific cognition, changes in the magnetic field produce electric field, so when there is current and voltage generation, need to have a change in magnetic flux, However, in the process of studying the nature of magnetization, we found that the microscopic formation of a magnetic field is the directional movement of positive and negative charges, under the guidance of this theory, we use other methods, realize the separation of positive and negative charges, observation of induced current generation, this can be used as another way to generate electricity.

Shashi Bhushan Chaturwedi, Swostika Mainali, Richa Chaudhary

Research Square • 2023

Abstract The purpose of this study was to evaluate antibacterial activity of pigment extracted from pigment producing bacteria isolated from soil samples. During the study, 20 soil samples were collected from different areas (forest, agriculture fields, river sides and dumping sites) of Kathmandu and Lalitpur districts which were processed for isolation of pigment producing bacteria by serial dilution and spread plate technique. The pigmented bacterial isolates were identified and enriched in nutrient broth. Then, pigment was extracted in 95% methanol as solvent, which was further characterized using UV-Vis Spectrophotometric and TLC analysis. The obtained crude pigment extract were processed to carry out the antimicrobial susceptibility assay using agar well diffusion method. Out of 13 total pigmented bacteria isolates, four different colored pigmented bacterial isolates (S4O, S11Y, S14P and S17G) which produced efficient pigment on nutrient agar were chosen and they were further processed. Among these isolates, S4O was identified as Staphylococcus aureus , S11Y was identified as Micrococcus luteus , S14P was identified as Micrococcus roseus and S17G was identified as Pseudomonas aeruginosa respectively. On characterization using UV-Vis Spectrophotometric and TLC analysis, the pigment extracted from isolates S4O, S11Y and S14P were found to be Carotenoids and from isolate S17G was found to be Pyocyanin in nature. The maximum antibacterial activity was shown against Staphylococcus aureus from all the four pigments extracts. The green color pigment extract from isolate S17G was found to be most effective against all the Gram positive and Gram negative test bacteria. This study suggest that these pigment extracts from pigmented bacteria may have beneficial antibacterial roles that can be exploited in controlling unwanted bacterial growth.

Greeshma S. S., Merlin Mathew, Murugadas. V. et al.

Fishery Technology • 2025

Keratinase-producing bacteria degrade keratin, a tough protein found in feathers, hair, nails, and other keratinized materials. Mud, water, and fish samples from ten poultry waste-fed, Pangasianodon hypophthalmus farms in Palakkad and Alappuzha districts of Kerala, India, were screened for keratinolytic bacteria. Among 116 proteolytic isolates, 6.9% showed keratinolytic activity on feather meal agar. Three isolates namely FWKB1, FMKB1 and FMKB2 were identified as having good keratinolytic potential. FMKB1 and FMKB2 isolated from soil samples in Palakkad were identified as Bacillus subtilis, while FWKB1 isolated from a water sample in Alappuzha was identified as Exiguobacterium profundum. In vitro enzyme assays revealed that FMKB1 and FMKB2 produced 53.2 U/mL and 66.8 U/mL of keratinase enzyme, respectively within 24h of incubation at 37°C. A direct keratinase assay with raw feathers exhibited 72.8 U/mL enzyme production by a combination of FMKB1 and FMKB2, completely degrading raw feathers within 45 days at 37°C. Characterisation of exo-enzyme production revealed the absence of lipase, gelatinase, and amylase enzymes. Haemolysis, Congo red binding, biofilm formation and the production of AHL signalling molecule were not detected in the bacterial isolates tested. These isolates can be promoted as environmental probiotics in aquaculture farms for waste management and protein recycling.

, Pises Liawsakul

• 1999

Two of 350 lipase producing bacterial strains isolated from soils were selected, name ALP-40.3 and ALP-42.11, and identified biochemically and bacteriologically to possibly be Psuedomomas sp. ALP-40.3 strain grew under optimum conditions, i.e., at 35 °C and wide pH range 6-10. ALP-42.11 grew optimally in lower temperature ranged from 25 °-35 °C and also wide pH range, and a large number of lipases were excreted when 2.5% olive oil was added into the growth medium. Some characteristics of both lipases were summarized as follow: under optimum conditions, i.e., at 45 °C, the highest activity of crude ALP-40.3 lipases was found (702 units/ml), and quite high activity would have maintained in a wide range of temperature from 35 °C-65 °C (328-702 units/ml). At 65 ํC, the highest activity of crude ALP-42.11 lipases was found (561 units/ml), and similar to the first lipase extract, quite high activity of the second lipases extract would have maintained in a wide range of temperature from 15 °-65 °C. It is noted that the effect of pH on activities of both lipase was quite stronger than effect of temperature. The highest activities of ALP-40.3 and ALP-42.11 lipases were found at pH 8 and 9, respectively, however, the activity of them has maintained in pH range 8-9. It is possible to say that they are alkaline lipases.

Ruby Khan

Current Trends in Natural Sciences • 2021

Antibiotics are a major secondary metabolite produced by a wide range of bacteria. The microbes developed various antibiotics that could be used to treat various infectious diseases. Are useful In vitro isolation, the culture and care of bacteria are quite simple, and we can easily improve their stress. The main soil pathogens of the Bacillus species are caused by important antibiotics such as bactericidal Endospores produced by the Bacillus species are very resistant. They are always found to inhibit the growth of other microbes. In the present research study, soil bacteria with antimicrobial activity have been screened and isolated. Subsequently, various pathogenic bacterial lawns were prepared to check the antimicrobial activity against various pathogens. Different zones are observed against different pathogenic bacteria. Comparison of antimicrobial activity of soil isolation with different antibiotic discs as well as various pathogenic bacteria. A clear zone of soil isolates of 5 mm, 15 mm, 21 mm, 12 mm, 30 mm, 32 mm and 40 mm against germs or pathogenic bacteria. The zones produced by antibiotic discs against pathogenic bacteria were zones of 5 mm, 10 mm, 12 mm, 15 mm, 20 mm, and 21 mm observed.

F.D. Gealy, H.L. Tuller

MRS Proceedings • 1986

ABSTRACT Electrically active defects are common in semiconductors. Such defects include easily ionized substitutional impurities, vacancies, and interstitials which can act as shallow donors or acceptors. If one type of defect predominates, its concentration corresponds directly to the local donor or acceptor concentration. Consequently, measurement of a carrier profile in a nonhomogeneous semiconductor is effectively the same as measurement of the defect profile. The photoelectrochemical profiling technique allows for carrier profile measurement with submicrometer spatial resolution. The sample is profiled by photoetching, then carrier measurement, and iterating this procedure until the desired profile depth is obtained. Derivation of the space charge capacitance by impedance spectroscopy is discussed. An analysis of the P-doped Si-liquid electrolyte interface is presented. Phosphorous diffusivity coefficients in good agreement with literature values are derived from photoelectrochemical derived profiles.

Yiwen Liu, Lai Peng, Shu-Hong Gao et al.

Environmental Science: Water Research & Technology • 2015

A new mathematical model was proposed to describe the extracellular electron transfer process by electrically active microorganisms.

V. I. Shapoval, V. V. Solov'ev, V. V. Malyshev

ChemInform • 2001

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Jared F. Mike, Jodie L. Lutkenhaus

ChemInform • 2013

Abstract Review: 65 refs.

P. FABER

Chemischer Informationsdienst • 1982

Abstract Es wird ein Verfahren entwickelt, bei dem auf technisch wirtschaftliche Weise durch Oxidation einer Aufschlämmung von Pb‐Pulvern oder niedrigen Pb‐oxiden unter alkalischen Bedingungen mit O 3 aktives β‐PbO 2‐δ hergestellt werden kann.

Haisheng Fang, Liping Li, Guangshe Li

ChemInform • 2007

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Daichi Yoshizu, Keisuke Tomita, Miyu Tsuchiya et al.

Microbiology Resource Announcements • 2025

ABSTRACT Three electrochemically active bacteria (EAB), strains ADMFC1, ADMFC2, and ADMFC3, were isolated from an anaerobic digester. Here, we report on genome sequences of the three EAB, which help deepen our understanding of the diversity and niches of EAB inhabiting anaerobic digesters.

Komal Pandey, P. Gupta, N. Verma et al.

Journal of Materials Chemistry A • 2021

A CeO2 sprinkled graphitic novel packed bed anode-based single-chamber MFC and its performance in upflow continuous mode.