properties processing and applications of syndiotactic polystyrene

chemical process safety learning from case histories

chemical process safety learning from case histories

Ngày tải lên : 02/04/2014, 16:30
... energy and support this second edition would not have happened The professional proofreading skills of my daughter Laura Sanders and her husband Morgan Grether have be instrumental in adding life and ... powerful and fundamental driver of human behavior, thought, and emotion [22] A number of thoughts on risk and the perception of risk are provided by a variety of authors [22–29] Splashy and Dreadful ... industries due to the nature of toxic and flammable liquids and gases [12] Naturally, the handling and storage of hazardous materials presented a potential peril that was often far greater than those...
  • 344
  • 770
  • 0
liquid ring vacuum pumps, compressors and systems_conventional and hermetic design

liquid ring vacuum pumps, compressors and systems_conventional and hermetic design

Ngày tải lên : 02/04/2014, 15:36
... standards for rotating machines 232 Characteristics and fields of applications of liquid ring vacuum pumps and compressors 234 Vacuum and Compressor Plants with Liquid Ring Machines 239 Demands ... Assembly and Testing of Vacuum Pumps and Systems 351 Installation of machines and devices 351 Pipework 351 General notes regarding installation 351 Cleaning of the pipework 352 Characterization of ... engineers practical point of view and is mainly addressed to students, technicians and engineers involved in designing and operating of machines and plants in the field of vacuum or to those keen...
  • 504
  • 1.1K
  • 0
Evaluation of heat pumps usage and energy savings in residential buildings

Evaluation of heat pumps usage and energy savings in residential buildings

Ngày tải lên : 05/09/2013, 16:10
... energy and, fuel injection and alternative fuels Leslie R Pagliari is an Associate Professor in the Department of Technology Systems and Associate Dean of Academic Affairs at the College of Technology ... values 1, 2, and for small, medium and large homes respectively Number of occupants represents the total number of persons that live in the house Number of stories takes values 1, and House orientation ... 140 and 205 m2) and large size (more than 205 m2) As shown in Figure 2, the percentages of the house sizes in the test group are 54%, 40%, and % for large, medium and small homes respectively and...
  • 10
  • 466
  • 0
Tài liệu PUMPS AND FANS pptx

Tài liệu PUMPS AND FANS pptx

Ngày tải lên : 27/01/2014, 16:20
... (Courtesy of American Society of Heating, Refrigerating and Air Conditioning Engineers.) Fig 55.2 Friction loss of air in straight ducts (Courtesy of American Society of Heating, Refrigerating and ... on the same coordinate system and establishes the point of operation of the pump in the system The actual point of operation of the model 3420 pump and the system of Example 55.1 is 7450 m /hr ... in fluid systems Tables and figures for pressure losses of water, steam, and air in pipe and duct systems are readily available from a number of references (See Figs 55.1 and 55.2.) 55.2.5 Systems...
  • 18
  • 480
  • 1
Know and Understand Centrifuga I Pumps docx

Know and Understand Centrifuga I Pumps docx

Ngày tải lên : 05/03/2014, 17:20
... function of the thickness of the casing and the tolerances, and the strength of the pump components As the pump performs its duty over time, and fluid passes through the pump, erosion and abrasive ... role in the pump’s flow and pressure, like the number, pitch, and thickness of the impeller blades, the internal clearances, and the presence and condition of the wear bands In simple terms, we ... and Given the following information: sp gr of water = 1.0 sp gr of gasoline = 0.70 sp gr of concentrated sulfuric acid = 2.00 sp.gr of sea water = 1.03 A pump capable of generating 125 feet of...
  • 270
  • 2.5K
  • 0
Báo cáo Y học: Inhibition of the SERCA Ca21 pumps by curcumin Curcumin putatively stabilizes the interaction between the nucleotide-binding and phosphorylation domains in the absence of ATP pot

Báo cáo Y học: Inhibition of the SERCA Ca21 pumps by curcumin Curcumin putatively stabilizes the interaction between the nucleotide-binding and phosphorylation domains in the absence of ATP pot

Ngày tải lên : 08/03/2014, 23:20
... sites and ligands, respectively, and [EL] is the concentration of bound ligand The total concentration of sites can be expressed as N[E]0, the product of total protein concentration ([E]0) and ... effects of Ca21 and ATP dependence of Ca21 ATPase activity by curcumin (A) Ca2þ-ATPase activity was measured as a function of [Ca2þ]free in the absence (B) and presence of 10 mM (W) and 25 mM ... suspension of reconstituted lipid vesicles The dye filled vesicles were diluted in 1.8 mL of Hepes buffer and fluorescence intensity was measured at excitation and emission wavelengths of 490 nm and 520...
  • 10
  • 594
  • 0
Báo cáo khoa học: Multidrug efflux pumps: drug binding – gates or cavity? Emily Crowley and Richard Callaghan pdf

Báo cáo khoa học: Multidrug efflux pumps: drug binding – gates or cavity? Emily Crowley and Richard Callaghan pdf

Ngày tải lên : 22/03/2014, 21:20
... chemically cleaved and the fragments analysed by MALDI-TOF MS This enabled precise identification of the fragments labelled by drug and enabled relative quantitation of the amount of drug bound Resistant ... reconciled into a map of the sites? Where we stand on the issue of the location of drug-binding sites on ABCB1? There is clearly a wealth of information implicating several regions of the protein (Fig ... caused by a lack of effort Since 1989, a large number of research teams have employed numerous strategies to elucidate the precise location of drug-binding sites on ABCB1 and a summary of the major...
  • 10
  • 180
  • 0
Báo cáo khoa học: Multidrug efflux pumps: The structures of prokaryotic ATP-binding cassette transporter efflux pumps and implications for our understanding of eukaryotic P-glycoproteins and homologues ppt

Báo cáo khoa học: Multidrug efflux pumps: The structures of prokaryotic ATP-binding cassette transporter efflux pumps and implications for our understanding of eukaryotic P-glycoproteins and homologues ppt

Ngày tải lên : 22/03/2014, 21:20
... analyses of cross-linking data and ligand docking, chiefly because of the NBD–TMD reverse domain order, the lack of conserved structural motifs ICD2 and ICD3, and shorter TMD helices and low sequence ... membrane) the sign of the distance change was the same as that observed in the three structural states of Chang, and the magnitudes of distance changes for three of the four pairs of residues for ... similar in terms of function This is pertinent because the physiological relevance of Sav1866 is not clear, and the function of MsbA is in the transport of lipid A (a component of the lipolysaccharide...
  • 14
  • 401
  • 0
Báo cáo Y học: Inhibition of SERCA Ca2+ pumps by 2-aminoethoxydiphenyl borate (2-APB) 2-APB reduces both Ca2+ binding and phosphoryl transfer from ATP, by interfering with the pathway leading to the Ca2+-binding sites ppt

Báo cáo Y học: Inhibition of SERCA Ca2+ pumps by 2-aminoethoxydiphenyl borate (2-APB) 2-APB reduces both Ca2+ binding and phosphoryl transfer from ATP, by interfering with the pathway leading to the Ca2+-binding sites ppt

Ngày tải lên : 31/03/2014, 23:20
... reducing both the affinity of Ca2+ binding and phosphoryl transfer and postulate that the drug binds to and interferes with the Ca2+ entry pathway of the Ca2+-ATPase MATERIALS AND METHODS 2-Aminoethoxydiphenylborate ... stimulatory phase of 0.40 ± 0.03 lM, and the Km for the inhibitory phase of 0.35 ± 0.06 mM However, in the presence of 2-APB (800 lM), the Vmax was reduced to 5.9 ± 0.2 UÆmg)1, and stimulatory and inhibitory ... of the fluorescent dye by Co2+ ions (15 lM) Upon addition of 2-APB, the rate of quenching is substantially increased and dependent upon the concentration of 2-APB The trace is representative of...
  • 10
  • 412
  • 0
audeltm pumps and hydraulics all new 6th edition

audeltm pumps and hydraulics all new 6th edition

Ngày tải lên : 02/04/2014, 15:31
... understanding of the fundamentals and operating principles of pumps, pump controls, and hydraulics A thorough knowledge of pumps has become more important, due to the large number of applications of ... temperature of pound of water 1◦ F is equal to the quantity of heat required to raise the temperature of 8.4 pounds of cast iron 1◦ F Since the specific heat of water is 1.0, the specific heat of cast ... force and its intervals, its direction, and its point of application The arrowhead indicates the point of application of the force Resultant of Directly Opposed Forces If the lines OA and OB...
  • 577
  • 912
  • 0
centrifugal pumps for petroleum, heavy duty chemical, and gas industry services

centrifugal pumps for petroleum, heavy duty chemical, and gas industry services

Ngày tải lên : 02/04/2014, 15:32
... heavy-duty chemical, and gas industry services This standard is based on the accumulated knowledge and experience manufacturers of and usersof centrifugal pumps The objectiveof this standardis to providea ... part of this standard The applicability of changes in standards, codes, and specifications that occur after the publicationof this standard shall be mutually agreed upon between the purchaser and ... incorporatingsections or thereof into another completestandard API standards are published as an aid to procurement of standardized equipment and materials These standardsare not intendedto inhibit...
  • 194
  • 1.1K
  • 0
Know and Understand Centrifugal Pumps potx

Know and Understand Centrifugal Pumps potx

Ngày tải lên : 27/06/2014, 17:20
... function of the thickness of the casing and the tolerances, and the strength of the pump components As the pump performs its duty over time, and fluid passes through the pump, erosion and abrasive ... role in the pump’s flow and pressure, like the number, pitch, and thickness of the impeller blades, the internal clearances, and the presence and condition of the wear bands In simple terms, we ... and Given the following information: sp gr of water = 1.0 sp gr of gasoline = 0.70 sp gr of concentrated sulfuric acid = 2.00 sp.gr of sea water = 1.03 A pump capable of generating 125 feet of...
  • 270
  • 654
  • 0
intuition pumps and other tools for thinking - daniel c. dennett

intuition pumps and other tools for thinking - daniel c. dennett

Ngày tải lên : 10/07/2014, 23:46
... process not only of life but also of knowledge and learning and understanding If you attempt to make sense of the world of ideas and meanings, free will and morality, art and science and even philosophy ... life, full of solid objects, colors and smells and tastes, voices and shadows, plants and animals, and people and all their stuff: not only tables and chairs, bridges and churches, dollars and contracts, ... them? And what are they made of? Philosophers have made some of the best of them—out of nothing but ideas, useful structures of information René Descartes gave us Cartesian coordinates, the x- and...
  • 370
  • 748
  • 0
Know and Understand Centrifugal Pumps Episode 1 pps

Know and Understand Centrifugal Pumps Episode 1 pps

Ngày tải lên : 13/08/2014, 09:21
... function of the thickness of the casing and the tolerances, and the strength of the pump components As the pump performs its duty over time, and fluid passes through the pump, erosion and abrasive ... Know and Understand Cent r ifuga I Pumps Know and Understand Centr ifuga I Pumps by Larry Bachus and Angel Custodio ELSEVIER UK USA JAPAN Elsevier ... pump will lose its efficiency and ability to pump These worn parts must be changed with a degree of frequency based on time and the abrasive and lubricating nature of the fluid Changing these parts...
  • 17
  • 222
  • 0
Know and Understand Centrifugal Pumps Episode 2 pdf

Know and Understand Centrifugal Pumps Episode 2 pdf

Ngày tải lên : 13/08/2014, 09:21
... and Given the following information: sp gr of water = 1.0 sp gr of gasoline = 0.70 sp gr of concentrated sulfuric acid = 2.00 sp.gr of sea water = 1.03 A pump capable of generating 125 feet of ... suction side of the pump, including what goes on in the eye of the impeller NPSH takes into consideration the suction piping and connections, the elevation and absolute pressure of the fluid ... centerline and converted into feet of head Hv = Velocity Head = V2/2g where: V = the velocity of the fluid moving through the pipes measured in feet per second, and ‘g’ = the acceleration of gravity...
  • 20
  • 377
  • 0
Know and Understand Centrifugal Pumps Episode 3 potx

Know and Understand Centrifugal Pumps Episode 3 potx

Ngày tải lên : 13/08/2014, 09:21
... nozzle Know and Understand Centrifugal Pumps w An increase of the temperature of the pumped liquid w An increase in the velocity or flow of the fluid w Separation and reduction of the flow due ... gouges, and track marks of cavitation on the impeller blades and pump housings But without understanding and analyzing the causes of cavitation damage, the mechanic can only install more bearings and ... reduce and stop cavitation and the resulting seal, bearing and pump failure Too many maintenance people (engineers and mechanics) are running around in circles, wringing their hands, and jumping...
  • 20
  • 273
  • 0
Know and Understand Centrifugal Pumps Episode 4 ppt

Know and Understand Centrifugal Pumps Episode 4 ppt

Ngày tải lên : 13/08/2014, 09:21
... type of pump - There arc many types of pumps with configurations and characteristics for special services, such as sanitary, wastewater, and solids handling, etc., taking into account the Ns and ... versatile and adaptable to different applications It can handle a variety of extension sections depending on the depth of the liquid source The pressure or discharge head is varied by adding and changing ... precision bearings and a shaft seal Much of the theory, and system needs, are applicable to both types of pumps Centrifugal _volute-~ - _ _ _ _ ~ _ _ _ pumps ~ _ ~ _ _ _ _ _ ~~ This type of pump adds...
  • 20
  • 222
  • 0
Know and Understand Centrifugal Pumps Episode 5 pps

Know and Understand Centrifugal Pumps Episode 5 pps

Ngày tải lên : 13/08/2014, 09:21
... between the OD of the eye and the bore of the pump housing This specific tolerance governs the efficiency of the pump The tolerance between the OD of the impeller eye and the internal bore of the pump ... side loading on the shaft and impeller assembly Wear bands ~ ~~~ ~~ ~~ ~~ Some pump companies will design replaceable wear bands for the OD of the impeller eye and the bore of the pump housing It’s ... pressure in feet of head (or meters of head) The pump operator needs a pump that generates 20 psi The manufacturer offers a model that generates 46 fi of head To understand pumps and analyze their...
  • 20
  • 431
  • 0
Know and Understand Centrifugal Pumps Episode 6 potx

Know and Understand Centrifugal Pumps Episode 6 potx

Ngày tải lên : 13/08/2014, 09:21
... equal to the T D H of the system Know and Understand Centrifugal Pumps Figure 8-2 ~~ ~~~~ Determining the Hs Of the four elements of the TDH, the Hs and the H p (elevation and pressure) exist ... head change and velocity head change are proportional to the square of the change in flow (AHf and AHv aAQ2) O n the system curve, the H f and Hv begin at gpm at the sum of Hs and Hp, and rise exponentially ... pump must comply with 73 ft of static and pressure head At the moment of starting the pump, the elements of H f and Hv come into play as flow increases Remember that Hf and Hv work in concert because...
  • 20
  • 274
  • 0
Know and Understand Centrifugal Pumps Episode 7 docx

Know and Understand Centrifugal Pumps Episode 7 docx

Ngày tải lên : 13/08/2014, 09:21
... refinery with 20,000 pumps and thousands of miles of pipe and equipment on site Imagine the number of tramp flanges in the fire water system in a skyscraper building In a real set of circumstances the ... system and pump turned off, we would open the vent valves on both the suction and discharge tanks, this assures that both sides of the system are atmospheric and cancels the Hp The discharge tank and ... the discharge of one pump feeds the suction of the next pump in series Two pumps running in series offer twice the head with the same flow And the combination of the two arrangements offers up to...
  • 20
  • 373
  • 0