hardness test Articles

  • Tradition dies hard

    Traditions in the way we view our environment are strongly entrenched in our collective mind, and any perturbation that could change them is usually strongly resisted.  However, change does occur [1], even though there is resistance to it, and this includes changes in the scientific process as well. Science is continually developing, with advances replacing what was previously envisioned to be ...


    By SAGE Publications

  • Chat for Compliance – a hacker’s view!

    The ongoing quest for compliance can sometimes be challenging when the needs are not always clear. For example, developing a new software is straightforward, customer needs or use cases, requirements, specification, test cases, validation testing… to name just a few. Assign resources, go! Sometimes however, the needs are rather technical and uncertain so trying to define the project for ...


    By qmsWrapper

  • Software is the soul of a tractor

    'Each year software is playing an increasingly important role, also when it comes to tractors. It is no longer possible to count the number of lines of code, as a single hydraulic valve from an outside supplier can contain as much code as an early HiTech tractor. Advanced software also allows a tractor’s functions to be altered after production. Software development, like all other tractor ...

  • 8 Reasons You Won`t Pass Your EHS Certification Exam

    You prepared for months, reviewed practice exam questions by the thousands, and you hope you’re prepared enough to take your ASP, CSP, CIH, or CHMM exam. However, there may be some things you haven’t considered that will keep you from passing your certification exam. I’ve talked to many clients over the years and there are some common themes in regards to reasons why candidates ...


    By Bowen EHS, LLC

  • Grazing effects on yield and quality of hard red and hard white winter wheat

    Six hard red (2137, Jagalene, Jagger, OK101, Stanton, and Thunderbolt) and six hard white (Burchett, Lakin, NuFrontier, NuHills, NuHorizon, and Trego) winter wheat (Triticum aestivum L.) varieties were evaluated for grain yield and quality in southwestern Kansas in 2004 and 2005. Cattle commonly graze wheat in this region from late November to mid March in a dual-purpose system. The experimental ...

  • Triaxial permeability testing and microstructure study of hard–to–drain coal from Sydney Basin, Australia

    Several mines operating in the Bulli seam of the Sydney Basin, Australia have coal seam zones that are difficult to drain. Metropolitan Colliery being one of such mines, has experienced difficulties in reducing gas content within the available drainage lead time; as the coal seam would not drain even with additional drainage boreholes. A research study using coal permeability testing and ...


    By Inderscience Publishers

  • Sources of Groundwater in Crystalline Hard Rocks of Kandy Area, Sri Lanka

    Abstract: Hydrogeological investigations were carried out to obtain sufficient information on groundwater availability in the fractured metamorphic rocks in Kandy district of Sri Lanka. 47 boreholes were drilled with the average depth of 90 metres and 24 high yielding wells were selected and long term pumping tests were carried out for each well using standard methods. The calculated total of ...


  • How can I measure temporary and permanent water hardness?

    Hard water is water with high levels of dissolved minerals, and usually occurs in areas where limestone and chalk are common. These minerals can be divided into two types, and so hardness is often considered in two categories – permanent and temporary water hardness. So how can we measure water hardness? Can we measure temporary and permanent ...


    By Camlab Limited

  • Manganese (Mn) toxicity to tropical freshwater species in low hardness water

    Elevated Manganese (Mn) is a common contaminant issue for mine water discharges and previous studies have reported that its toxicity is ameliorated by H + , Ca2+ and Mg2+ ions. The toxicity of manganese (Mn) was assessed in a high risk scenario, i.e. the slightly acidic, soft waters of Magela Creek, Kakadu National Park, Northern Territory, Australia. Toxicity estimates were derived for six ...


    By John Wiley & Sons, Ltd.

  • A comparative performance evaluation of the conducted emissions in hard switched SPWM and HPWM inverters

    This paper presents simulation and experimental discussions on conducted electromagnetic interference (EMI) emissions for a single-phase full-bridge sinusoidal pulse width modulated (SPWM) and hybrid pulse width modulated (HPWM) inverters. The influences of input dc link voltage, modulation depth and carrier frequency on the conducted noise are studied through ICAP simulation software. HPWM ...


    By Inderscience Publishers

  • How to Buy a Hard Floor Cleaning Equipment for Steam Cleaning Floors?

    Hard floor cleaner machines are available in dozens on the Internet. However, it is not easy to find good quality machines. The large number of options actually confuses the prospective buyers. There are many types of machines available for hard surface cleaning. Pressure wash equipment make excellent hard floor cleaner machines. Steamers are also top quality machines for hard surface cleaning. ...


    By Daimer Industries Inc.

  • New total hardness (Calcium and Magnesium) automated titration method case study

    MANTECH INC. is a leading manufacturer of automated multi-parameter, titration, Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) laboratory and process instruments. MANTECH developed the first automated software based titration system in the world. By listening to our environmental customers, MANTECH understood the need to develop a new total hardness (calcium and magnesium) ...


    By MANTECH INC.

  • Hard tissue samples as markers of occupational exposure in a phosphate fertiliser plant

    This paper describes the results of study on testing of hair and nails samples as possible markers of occupational exposure in a phosphate fertiliser plant. The key objectives were to verify if: (1) elements originating from fertiliser production may accumulate in hard tissue and hence allow preliminary occupational exposure risk assessment; (2) linear discriminant function analysis (LDA) may be ...


    By Inderscience Publishers

  • China RoHS Phase 2: Hard data reveals a red flag

    At a time when companies are scrambling to comply with China RoHS Phase 1 requirements,  GoodBye Chain Group (GCG) has discovered an issue of high importance in regard to China RoHS Phase 2: namely, the financially risky situation that many companies will be in if a) they have used substance exemptions for EU RoHS or delayed their RoHS-conversion because their Category 8 (medical) or ...


    By The GoodBye Chain Group

  • Knowing the Use of Floor Steam Cleaner for Hard Wood Cleaning

    A floor steam cleaner is what its name indicates. It is a cleaning machine that cleans the floor with its steam output. The steam melts the dirt and impure substances on the floor. The molten dirt is then removed either manually or with the aid of a vacuum. A floor steam cleaner cleans with its steam output. Modern machines have an output temperature of up to 386°F. Such high temperature is ...


    By Daimer Industries Inc.

  • Ultrasonic Testing For Non Destructive Testing

    Ultrasonic Testing or UT as its known has programs in a wide range of sectors, from aerospace, automobile, to substance, oil, large storage space, and power creation and overseas. UT is aspect of a selection of techniques known as NDT (Non Destructive Testing) methods. Their objective in industry is to allow the examination of parts and equipment ...


    By Non Destructive Testing Lab

  • Impact of environmentally based chemical hardness on uranium speciation and toxicity in six aquatic species

    Treated effluent discharge from uranium (U) mines and mills elevates the concentration of U, calcium (Ca), magnesium (Mg) and sulfate (SO42‐) above natural levels in receiving waters. Many investigations on the effect of hardness on U toxicity were often experiments on the combined effect of changes in hardness, pH and alkalinity which do not represent water chemistry downstream of U mines and ...


    By John Wiley & Sons, Ltd.

  • Removal of DOC and its fractions from surface waters of the Canadian Prairie containing high levels of DOC and hardness

    In this paper removal of dissolved organic carbon (DOC) and its fractions by chemical coagulation was studied. Raw water was collected from the Red River (Manitoba, Canada). This source water has a DOC concentration ranging from 8 to 12 mg L−1 and total hardness of about 400 mg L−1 CaCO3, which represents a typical surface water quality of the Canadian Prairie. ...


    By IWA Publishing

  • Green energy test

    Investment growth in clean energy plummeted from phenomenal rates of more than 50% a year in 2005-7 to just 5% in 2008. With credit hard to get hold of and oil prices languishing in the region of $40 dollar/barrel, what does the future hold for what was a booming alternative energy industry? Michael Liebreich – founder and CEO of New Energy Finance, clean energy analysts – is surprisingly ...

  • Apartment Water Test - Case Study

    We had successfully mitigated this exact situation at another property (Family Tree Apartments] which also had extensive pin hole leaks and water heater failures. Based upon this prior exceptional success, it was clear that the H20 Solutions USA, LLC team was again needed to engineer a solution. H20 Solutions USA, LLC is analysis revealed that the water supply in Greenfield, CAis very hard at 18 ...


    By HydroFLOW USA

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you