effect of substrate molar ratio on the initial reaction rate

... time, amount of substrate and the water content of the lipase It was concluded that the effect of water is based on a modification of the microenvironment of the enzyme by the solution of CO2 in ... Because of the mass transfer limit, a rather long time for the reaction is required Like other esterification reactions, the presence of water in the final product inhibits the reaction rate Therefore, ... Mcer = Mass of extract till the end of constant extraction rate period (kg) tcer = Time of extraction till the end of constant extraction rate period (min) xo = Initial concentration of solid (kg/kg)...

Ngày tải lên: 21/05/2016, 22:18

... with the gel phase of the resin in the catalyst due to the chain length effect and its facilitation of adsorption on the strong protonic sites Therefore, the adsorption and diffusion of the ester ... Hydrocarbon Chain Length on the Acid The influence of the hydrocarbon chain length on the diffusion rate of the acid in the catalyst was studied The results present in Table clearly showed that the ... laurate Therefore, for Nafion resin, the reaction takes place mainly at the external surface of the resin where shape selectivity does not exist.16 On the other hand, the reaction might occur on...

Ngày tải lên: 07/08/2014, 14:20

... concentration of the adsorbate in the soil-less blank (mg/l); Cf is the final concentration of the adsorbate in the filtrate (mg/l) Sðmg=kg soilÞ ¼ ðC0 À Cf ÞV M ð2Þ where S is the adsorption of ... consistently at the desired pH values The 24-h adsorption equilibration period was chosen based on the results of the earlier kinetic adsorption experiment At the end of the 24-h pH equilibration, the pH ... Adsorption (mg/kg soil) 350 40 0.06 Fig Effect of PO3À at various concentrations on the adsorption of As(III), As(V), Se(IV), and Se(VI) the effect of competitive anion on As and Se adsorption on the...

Ngày tải lên: 16/03/2014, 00:25

... lacinilc fo noitaulave yb demrofrep saw sisongaid MCT skeew 21 gnirud demrofrep saw tnemtaert erutcnupucaortcele elohw ehT snoitacilppa tsal eht rof syad 41 yreve neht ,skeew rof keew a ecno erutcnupucaortcele ... alumrof tsrif eht elbane oT niap etaivella dna noitalucric pleh ,ygrene revil dna yendik ecnahne ,ssenpmad dna dniw lepxe ot nesohc saw alumrof tsrif ehT ]51,31[ ,alumrof cinot a yb dewollof , ... dna :tnemtaert rof nesohc erew )1 elbaT( salumrof labreh esenihC lanoitidart gniwollof ehT seigrene yendiK dna neelpS , ecnahne dna ssenpmad esrepsid ot desu saw 6PS dna worram rof tniop laitneulfni...

Ngày tải lên: 07/08/2014, 20:23

... wavelength converters are present in the network, a lightpath may be converted from one wavelength to another along the route Otherwise, it must utilise the same wavelength on all the links along the ... switching stage to the input of the next switching stage In a feedback configuration, delay lines connect the output of a switching stage back to the input of the 15 same stage Long holding time ... for asynchronous OPS It allows 19 great saving on the number of converters needed However, the drawbacks are the enlargement of the switching matrix and additional attenuation of the optical...

Ngày tải lên: 15/09/2015, 21:52

... Survival of Two Main Types of Soft Tissue Sarcoma The probability of survival along y- axis is plotted as function of time in months along x-axis for major sub-types of soft tissue sarcoma The dotted ... presentation The long bones of the extremity were the main site of involvement in Osteogenic sarcoma with 17 cases (77%) of lower extremity and cases (18%) of upper extremity location, while the site ... than 1% of the cases (Figure Pie chart) Page of The mean age group for the whole study population was 32.5 years with the range of 18 to 47 years The stage of the disease at presentation was generally...

Ngày tải lên: 09/08/2014, 01:24

... measured in these studies Ours is the only study to report the distribution of [Lac] in the central vasculature, and only two other studies have compared lactate concentrations in SVC and pulmonary ... Discussion The aim of the present study was to test the hypothesis that the mechanism responsible for the development of SO2 and [Lac] gradients from SVC to pulmonary artery is mixing of SVC with ... site), and pulmonary artery (pulmonary artery site) A small amount of non-ionic contrast media was injected with the catheter in the right atrium to rule out the presence of a patent Page of (page...

Ngày tải lên: 13/08/2014, 03:20

... copies of the natural intron-containing gene The elimination of introns is an advantageous approach for reducing of the size of the vector transcript to conform to the packaging capacity of the ... participated in the preparation of the manuscript KBL coordinated the design and implementation of the study, the data analysis, and the preparation of the manuscript All authors read and approved the final ... exon junctions as a consequence of splicing [11,12] The elimination of intronic sequences can reduce protein yield in a range of a factor of to 30 [13,14] Therefore the elimination of introns...

Ngày tải lên: 13/08/2014, 09:21

... dtime denote the firm size, day of the week, and time of the day, respectively The dummy variables take the value of one if the observation of the dependent variable belongs to the relevant group, ... at the beginning and the end of the week This is consistent with the finding that on the NYSE liquidity is lowest on Mondays and Fridays and highest during the middle of the week The regression ... of the dollar amounts of the buy and sell orders submitted at the best bid and offer prices The cumulative depth is the sum of the dollar amounts of orders at the five queues on both sides of the...

Ngày tải lên: 31/10/2014, 10:17

... space of time, the writer prevents any emotional identification with any of the characters The mode of first-person narration on the other hand demands the characteristics of the spoken rather ... barks of dogs” (147) But the call of the muezzin pierces through his attempts at concentration The vision of the candles, oil lamps, the hordes of monks, the cold granite floor, the huge images of ... with the reference to the Book of Revelations This allusion performs the synecdochic function of registering the teachings of the Bible As the monk boards the car, the number takes on an ironic...

Ngày tải lên: 16/09/2015, 08:30

... weeks’ gestation, and neonatal death Sterilization by tubal ligation was offered and accepted under these circumstances, in view of the anticipated further deterioration of her renal function with ... using the normal drug regimen, but the patient was given a much lower dose than usual, with the aim of minimizing the effect of the hormone stimulation on the transplanted kidney Two oocytes ... reported a prematurity rate of 17 per cent and a spontaneous abortion rate (miscarriage) of 20 per cent, as compared to 163 164 G.M Lockwood prematurity and spontaneous abortion rates of and 12 per cent,...

Ngày tải lên: 01/11/2013, 08:20

... behind the local variations The components work separately In the beginning of a new session, the current offline model of the user’s skill level is copied onto the online component and used as the ... producing the DASEX recommendations, while at the end of each session, the offline component calculates the new default level on the basis of the occurred events Figure provides an illustration of the ... recommendations on the fly, whereas the latter makes long-time observations and, based on these, calculates default DASEX values to be used at the beginning of the next session The offline component...

Ngày tải lên: 23/03/2014, 19:20

... pronoun, article, ~preposition or conjunction In (5), where we assume focus on both the main verb and the time adverbial, the accent pattern on the adverbial has been modified by the 1111 (the ... exclnsively of s-nodes In (3) I illustrate the operation of the BLR All left-hand sisters in (3) are labelled w, except for the NP een mooi boek, which is an argument Granted a focus on the predicate, ... probably the speaker's intention to focus on the subject NP; we can say that all the material from a to classics is [ +focus], while the rest of the sentence is [focus] Given the speaker's decision...

Ngày tải lên: 01/04/2014, 00:20

... birth to the age of 15 months is based on three minutes of videotaped play interaction under non-threatening conditions The coding procedure focuses observers’ attention on seven aspects of adult ... behaviour, some of which assess emotion (facial expression, vocal expression, position and body contact, expression of affection) and others “cognition”, i.e., temporal order and interpersonal contingency ... approximately one hour The high-risk families of the intervention group received their questionnaires in advance from the midwives who support them during the KfdN programme The controls received questionnaires...

Ngày tải lên: 13/08/2014, 18:21

... comparison of respondents and non-respondents in the indirectly affected group based on previous assessment of PTSS was precluded Further, in consideration of the age of the participants and the ... after the disaster [15], 90% of whom developed PTSD during the first months: the duration of PTSD was > years in 26% of the cases and at follow-up, the point prevalence of PTSD was 34% These ... http://www.capmh.com/content/5/1/8 a configuration regarding responses to trauma-related stimuli is set, any greater accommodation of these responses is unlikely without the processing of the core emotions and...

Ngày tải lên: 13/08/2014, 18:21

... Effects of Nutrient Condition on Biofilm Formation in DWDS Besides disinfection as an effective biofim control method in DWDS, the effect of nutrient condition is another consideration for DWDS ... addition on biofilm formation and control in DWDS 1.3 Outline of Thesis This thesis presents the study on the effects of phosphorus addition on biofilm formation and control in DWDS The background ... to bind the agent, concentration of agent used and the turnover rate of micro colony versus diffusion rate of antimicrobial agents As described above, the EPS are the main component of biofilm...

Ngày tải lên: 11/09/2015, 09:17

... volume of 25 μl containing 12.5 μl of 2× RT-PCR Reaction Mix, 400 nM of each primer, 120 nM of probe, 0.5 μl of iScript Reverse Transcriptase, and μl of template Optimized rRT-PCR conditions were ... infection and H5N1 subtyping Results Analytical sensitivity and specificity The analytical sensitivity of our LNA Taqman rRT-PCR for the detection of the HA gene of H5N1 was < 0.5 PFU of virus ... extraction) The primers and probe used in this study were designed to target a highly conserved region in the HA gene of H5N1 viruses; to ensure amplification of both clade and RNA, one and two...

Ngày tải lên: 12/08/2014, 04:21

Ngày tải lên: 14/11/2014, 10:13

... upon the type and amount of the discounts offered by the store The only thing that attracts them to a store is the offers and discounts offered by the retailer They are the cash generators STRATEGY ... customers They shift their decisions very swiftly They take quick purchase decision at a moment and the very next moment they may change their decision and drop the idea of buying anything from the ... them by the sales personnel STRATEGY TO HANDLE SUCH TYPE OF CUSTOMERS: These types of customers can be easily identified by the way they react to the assistance offered to them Such types of customers...

Ngày tải lên: 19/02/2014, 10:20

... question A: culture type (solid or liquid); percentage of contaminated cultures; review question B: the name and manufacturer of the reference standard • Details of index test: software version of ... rifampicin-susceptible M tuberculosis The number of positive beacons allows the test to distinguish among the following results: ’No TB detected’ (none of the five beacons is positive); ’TB detected, ... presents an additional barrier to using these tests Rationale Existing diagnostic tools for TB are not accurate, or cannot be done rapidly at the point -of- care; therefore, there is an urgent...

Ngày tải lên: 06/03/2014, 04:20