structure morphology and crystallization behavior of syndiotactic polystyrene

... 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 ... 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 ... 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...

Ngày tải lên: 02/04/2014, 16:30

... Influence of the operating temperature of the ring liquid on suction capacity and suction pressure of the pump 178 Operating behavior at different densities of the operating liquid 180 Influence of ... the viscosity of the operating liquid on the discharge behavior of the pump 182 Solubility of gases in the operating liquid 183 The quantity of operating liquid 184 The behavior of liquid ring ... 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...

Ngày tải lên: 02/04/2014, 15:36

... 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...

Ngày tải lên: 05/09/2013, 16:10

... (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...

Ngày tải lên: 27/01/2014, 16:20

... 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...

Ngày tải lên: 05/03/2014, 17:20

... 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...

Ngày tải lên: 08/03/2014, 23:20

... 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 ... approaches in the analysis of ABCB1 are currently based on non-ABCB1 structures and therefore a degree of caution is prudent [33–36] Two principle structures are employed, namely MsbA and Sav186, but unfortunately ... 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...

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 ... regard to a structural understanding of multidrug binding The structure is comparable in terms of the fold and the domain–domain interactions to the structures of MsbA and Sav1866 Furthermore, a ... whereas ABCB1 and ABCC1 comprise a single polypeptide A crystallization of the recent history of ABC exporters: when seeing is believing A brief account of the complete structures of ABC exporters...

Ngày tải lên: 22/03/2014, 21:20

... 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...

Ngày tải lên: 31/03/2014, 23:20

... 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...

Ngày tải lên: 02/04/2014, 15:31

... 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...

Ngày tải lên: 02/04/2014, 15:32

... 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...

Ngày tải lên: 27/06/2014, 17:20

... 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...

Ngày tải lên: 10/07/2014, 23:46

... 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...

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...

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...

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 ... one of the most important efficiency factors Affecting the impeller’s behavior are: The impeller velocity The impeller diameter The number of blades on the impeller The diameter of the eye of ... 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...

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...

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...

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...

Ngày tải lên: 13/08/2014, 09:21