Propellants

The aim of this research is to employ a sensitivity study for the total thrust of a ducted twin counter-rotating propeller system design for UAV applications using computational fluid dynamics (CFD). Two factors were investigated: propeller spacing and difference between blades pitch angle. Using discrete values for both factors, 32 designs were analysed and evaluated. The same approach was also used for an equivalent unducted propeller system to access the influence of the duct.

142p runthenight07 01-03-2023 11 3   Download

Hemopexin (HPX), which serves as a scavenger and transporter of toxic plasma heme, has been postulated to play a key role in the homeostasis of NO. In fact, HPX–heme(II) reversibly binds NO and facilitates NO scaven-ging by O2. HPX–heme is formed by two four-bladed b-propeller domains. The heme is bound between the twob-propeller domains, residues His213 and His266 coordinate the heme iron atom.

12p inspiron33 23-03-2013 43 5   Download

We have recently identified a protein, consisting of seven WD repeats, pre-sumably forming a b-propeller, and a domain identified in Fab1p, YOTB, VAC1p, and EEA1 (FYVE) domain, ProF. The FYVE domain targets the protein to vesicular membranes, while the WD repeats allow binding of the activated kinases Akt and protein kinase (PK)Cf.

15p galaxyss3 21-03-2013 31 3   Download

Human serum paraoxonase 1 (HuPON1; EC 3.1.8.1) is a calcium-depend-ent six-foldb-propeller enzyme that has been shown to hydrolyze an array of substrates, including organophosphorus (OP) chemical warfare nerve agents. Although recent efforts utilizing site-directed mutagenesis have demonstrated specific residues (such as Phe222 and His115) to be import-

9p galaxyss3 21-03-2013 32 4   Download

b-Propeller phytases (BPPs) with tandemly repeated domains are abundant in nature. Previous studies have shown that the intact domain is responsi-ble for phytate hydrolysis, but the function of the other domain is rela-tively unknown. In this study, a new dual-domain BPP (PhyH) from Bacillussp.

9p cosis54 04-01-2013 35 4   Download

Sensor used in this project is MOC 7811 from Motorola. This is a slotted coupler/interrupter device. In each revolution as the beam is interrupted, the sensor generates a positive pulse. Microcontroller will execute interrupt routine, When a pulse occurs. Interrupt routine measures the total time taken for one revolution, divides it by 120, and stores the result into another timer, Configured in auto-reload mode. Now, the timer overflows after tiny intervals of time. Each time it overflows, next stored value is called from the lookup table, and displayed....

11p thantqvuong 02-04-2012 269 73   Download

Propeller Shaft

10p hungnhat 07-12-2009 40 3   Download

A typical 4 cylinder vehicle cruising along the highway at around 50 miles per hour, will produce 4000 controlled explosions per minute inside the engine as the spark plugs ignite the fuel in each cylinder to propel the vehicle down the road.

4p nhan4321 29-10-2009 176 36   Download