J. H. Cho Articles | Environmental XPRT

Effect of three non–protein thiols on CHO cells exposed to low doses of X–radiation

The goals of this study were to determine whether cysteamine, β–mercaptohetanol and glutathione protect CHO K1 cells against chromosomal aberrations induced by low doses of X–radiation, as well as whether radiation protection is related to physical properties of those thiols. Experimental design included four different treatments: (a) control, (b) cells treated with 5 mM of each thiol, (c) cells ...

Aug. 1, 2013

By Inderscience Publishers

Improvement of the glutaryl-7-aminocephalosporanic acid acylase activity of a bacterial -glutamyltranspeptidase

Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan; Department of Biological Sciences, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan; Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, Nonoichi-cho, Ishikawa 921-8836, Japan; and Division of Applied ...

Aug. 1, 2008

By American Society for Microbiology (ASM)

Using Rn-222 to manage the air quality of air conditioned buildings in Hong Kong

This paper proposes a pragmatic methodology to manage the air quality of an air conditioned building as well as optimizing energy consumption during venting. Radon-222 (Rn-222) is used as a tracer to quantify the specific production rates and resultant losses of pollutants for which the information is important in indoor air quality management. A term, indoor pollutant inventory, is introduced ...

Oct. 1, 2008

By SAGE Publications Ltd

Customers recommend leachate pumps from Geotech - Case Study

Application Leachate recirculation and condensate removal from gas lines Equipment The AP AutoPump range Location Sites across the UK Customer H&J Pipe Jointing Services Ltd Requirement Colin Jones of H&J Pipe Jointing Services said, "We were looking to supply pumps that were fit for purpose and that did the job, and after trying other brands we soon realised that the AP range ...

Mar. 11, 2016

By QED Environmental Systems Ltd.

Book Review: World in Transition: Towards Sustainable Energy Systems

World in Transition: Towards Sustainable Energy Systems, by H. Grasl, J. Kokott, M. Kulessa and J. Luther. Earthscan, 2004. 242pp. ISBN 1-85383-882-9Keywords: book ...

Jul. 31, 2006

By Inderscience Publishers

Molecular characterization of dissolved organic matter in various urban water resources using Orbitrap Fourier transform mass spectrometry

Molecular-level characterization of dissolved organic matter (DOM) in different urban water resources (river water, groundwater, reclaimed water, and rainwater) was performed by Orbitrap Fourier transform mass spectrometry (FT-MS). The mass spectra, which were fingerprints of DOM composition, were clearly different among samples. Based on accurate molecular mass determination, about 300 ...

Aug. 6, 2014

By IWA Publishing

Indoor Volatile Organic Compounds (VOCs): How it Affects Your Air Quality

What Are Indoor VOCs? VOCs or Volatile Organic Compounds in general are chemicals emitted as gases from solids or liquids. They include a huge variety of chemicals, some of which may have short and long-term adverse health effects. Outside they react with ozone and other chemicals to form smog. However, our concern is with indoor VOCs and their affect on air quality. Definition of Volatile ...

Jul. 8, 2019

By Indoor Environmental Technologies (IET)

Measurement of Sulfur in Refinery Flare Gas Streams for Compliance with EPA SubpartJ(a) Regulations

The Challenge Measurement of high range and low range H,S in refinery flare gas streams for compliance with EPA regulation NSPS Subpart J(a). The rule has placed an extra investment and operational burden on petroleum refineries to meet the regulatory requirement. AMETEK offers an economical solution to meet the challenge with an emphasis on lower capital and operating cost along with improved ...

Nov. 14, 2014

By AMETEK Process Instruments

Mind bomb-1 is essential for intraembryonic hematopoiesis in the aortic endothelium and the subaortic patches

Intraembryonic hematopoiesis occurs at two different sites, the floor of the aorta and subaortic patches (SAPs) of the para-aortic splanchnopleura (P-Sp)/aorta-gonad-mesonephros (AGM) region. Notch1 and RBP-j are critical for the specification of hematopoietic stem cells (HSCs) in Notch signal-receiving cells. However, the mechanism by which Notch signaling is triggered from the Notch ...

Aug. 1, 2008

By American Society for Microbiology (ASM)

Electrolytic removal of ammonia from aqueous phase by Pt/Ti anode

This study investigated the mechanism and kinetic modeling of electrolytic degradation of ammonia with Pt/Ti anode. The results show that ammonia oxidation from direct oxidation or indirect oxidation with hydroxyl radicals was slow but can be observed under pH 9 and high initial ammonia concentration of 1,050 mg N L−1. Indirect oxidation with HOCl was the mechanism for the ...

Jun. 11, 2013

By IWA Publishing

S-adenosylmethionine and methylthioadenosine boost cellular productivities of antibody forming CHO cells

Product titers from Chinese hamster ovary (CHO) processes have increased steadily over the past decade, with reports from fed-batch processes now exceeding 5 g/L. Several approaches are being implemented for titer increases based mostly on volumetric productivity by supporting high viable cell densities (VCD). Another variable to focus on is increasing cell-specific productivity (CSP). CSP ...

Dec. 28, 2020

By 908 Devices Inc.

Prevalence and genetic diversity of bartonella species isolated from wild rodents in Japan

Here, we describe for the first time the prevalence and genetic properties of Bartonella organisms in wild rodents in Japan. We captured 685 wild rodents throughout Japan (in 12 prefectures) and successfully isolated Bartonella organisms from 176 of the 685 rodents (isolation rate, 25.7%). Those Bartonella isolates were all obtained from the rodents captured in suburban areas (rate, 51.8%), but ...

Aug. 1, 2008

By American Society for Microbiology (ASM)

Desalination of simulated seawater by purge-air pervaporation using an innovative fabricated membrane

An innovative polymeric membrane has been invented, which presents a breakthrough in the field of desalination membranes. It can desalinate simulated seawater of exceptionally high concentration to produce a high flux of potable water with over 99.7% salt rejection (%SR) in a once-through purge-air pervaporation (PV) process. A set-up was constructed for conducting the ...

Aug. 19, 2015

By IWA Publishing

Chronic exposure to low–dose of X–rays induces DNA double–strand breaks in mammalian cells

The purpose of present study is to evaluate the induction of clastogenic effect after chronic exposure to low dose of ionising radiation in both CHO–K1 cells and in their DNA Double–Strand Breaks (DSBs)–repair deficient mutant xrs–5. Cells were cultured for 14 dilution cycles and grown to confluency. Radiation treatment was performed once per cycle with 10 mGy X–rays to carry out the structural ...

Apr. 2, 2012

By Inderscience Publishers

Mechanistic study of Cd adsorption through esterification and acetylation of novel biosorbent Gallus Domesticus chemically modified biomaterial for heavy metal

The inevitable expansion of industries for development is at the cost of release of industrial pollutants into the natural reservoirs of the environment. Biosorption is becoming an important component in the integrated approach to the treatment of aqueous effluents. The adsorption properties of Gallus Domesticus are determined as a function of batch operating conditions including contact time, ...

May 28, 2014

By IWA Publishing

A sheet erodibility parameter for water erosion modeling in regions with low intensity rain

Soil erodibility reflects the soil effect on the detachment process by rainfall and runoff; an evaluation of this parameter for single storm events was carried out using natural runoff plot data collected for two rainfall seasons in northern Iraq. The region is characterized by a semiarid Mediterranean-type climate with normal rainfall intensity below 20 mm/h and dominant sheet erosion on ...

Nov. 20, 2013

By IWA Publishing

Temperature Compensation and Control

Alkalinity, pH , and conductivity are just a few of many parameters that are highly affected by temperature. In order to ensure accurate measurements, it is critical to maintain the temperature of the measurement by either a) compensation via mathematical correction, or b) keeping the sample to a constant reference temperature. pH The slope calculated by a pH electrode follows accordingly with ...

Dec. 10, 2019

By MANTECH Inc.

University Research Group utilise the Systech 8001 OTR analyser to test the oxygen barrier properties of biodegradable packaging materials

The University of Helsinki is at the forefront of international research and doctoral education. The quality of the University’s research is reflected in the high number of Centres of Excellence, Academy Professors, Fellows and Researchers. It is also actively involved in the Strategic Centres for Science, Technology and Innovation which enable leading research units and companies to ...

Feb. 24, 2016

By Industrial Physics Product Integrity Limited

A combined process of non-thermal plasma with sludge stabilization for the simultaneous reduction of odor and organic waste

Odor emissions and sludge disposals have become most challenging issues in many sludge treatment plants, and separate chemical oxidation processes have been commonly employed for these problems. It is, therefore, necessary to develop a combined process that simultaneously reduces the odor emissions and the amount of waste sludge. In this study, a non-thermal plasma reactor using a dielectric ...

Dec. 1, 2011

By IWA Publishing

Limits of UV disinfection: UV/electrolysis hybrid technology as a promising alternative for direct reuse of biologically treated wastewater

Although UV irradiation represents an energy efficient disinfection method, bacterial regrowth in UV irradiated secondary effluents is a serious problem for their direct reuse (e.g., for domestic or irrigation purposes). The decrease of the lethal UV fluence caused by coverings (scaling and biofouling) on quartz sleeves of UV lamps and/or fluctuating specific water parameters (suspended solids, ...

Oct. 21, 2013

By IWA Publishing