Two beta strands with an alpha helix end folded over to bind a zinc ion.

Two 1930s Dinky Toy liners of equal age and storage history, one badly affected by zinc pest, the other not.

Two variants are pore-free die casting, which is used to eliminate gas porosity defects ; and direct injection die casting, which is used with zinc castings to reduce scrap and increase yield.

Two of Vlaminck's groundbreaking paintings, Sur le zinc ( At the Bar ) and L ' homme a la pipe ( Man Smoking a Pipe ) were painted in 1900.

Two water molecules are oxidized by four successive charge-separation reactions by photosystem II to yield a molecule of diatomic oxygen and four hydrogen ions ; the electron yielded in each step is transferred to a redox-active tyrosine residue that then reduces the photoxidized paired-chlorophyll a species called P680 that serves as the primary ( light-driven ) electron donor in the photosystem II reaction center.

Two special types have been suggested: carbenium ions ( protonated carbenes, hence the name ) are trivalent and carbonium ions ( protonated alkanes ) are pentavalent or hexavalent.

Two or more molecular entities ( atoms, molecules, or ions ) are described as being isoelectronic with each other if they have the same number of electrons or a similar electron configuration and the same structure ( number and connectivity of atoms ), regardless of the nature of the elements involved.

Two independent rings ( arbitrarily denoted as " Blue " and " Yellow " rings, see also the photograph ) circulate heavy ions and / or protons in opposite directions and allow a virtually free choice of colliding positively charged particles ( the eRHIC upgrade will allow collisions between positively and negatively charged particles ).

Two polyphosphide ions, found in and found in K < sub > 5 </ sub > P < sub > 4 </ sub >, are radical anions with an odd number of valence electrons making both compounds paramagnetic.

Two thieves are crucified with Christ, one saved and the other damned.

Two of the vital qualities demanded of a politician by other politicians are that he always keep a confidence and that he keep his word.

Two poets are paired on each record, in the order given above.

Two Anabaptists, Caroli and Benoit, are to challenge you and William to a debate before the Council.

Two features are immediately evident.

Two cities to be considered, Providence and Cranston, are an enigma.

Two walls of concrete blocks are constructed at least 20 inches apart.

Two or more dogs are mounted on each locking bar.

Two very useful ways for modifying a form-dictionary are the addition to the dictionary of complete paradigms rather than single forms and the application of a single change to more than one dictionary form.

Two metabolites ( 1, and 2 ) ) of p-aminobenzoic acid ( PABA ) which act as cofactors for the hydroxylation of aniline by acid-fast bacteria are biosynthesized from Aj.

Two of the clamps are fixed to the edges of the board whereas two clamps travel on guide rails opposite the fixed clamps.

Two unsolved mysteries are based on these facts.

Two of these are in or near Dallas and the others away from the vicinity.

`` Two, wage costs are a fraction of the U.S. costs.

Two sharply contrasting places designed for public enjoyment are now on display.

Two apparent experimental methods of increasing F are increasing the

Two of the most well-known applications of the pure elements are rubidium and caesium atomic clocks, of which caesium atomic clocks are the most accurate representation of time known as of.

Two of the genera, Hemerocallis ( day lily ) and Phormium ( New Zealand flax ), are grown as ornamentals worldwide.

Two 13-person juries composed of artists, academics, critics and AFI Trustees deliberate, discuss and determine the honored ensembles, who are then feted at a private event in January.

Seven stories are inspired by a nursery rhyme: And Then There Were None by Ten Little Indians ; One, Two, Buckle My Shoe by One, Two, Buckle My Shoe ; Five Little Pigs by This Little Piggy ; Crooked House by There Was a Crooked Man ; A Pocket Full of Rye by Sing a Song of Sixpence ; Hickory Dickory Dock by Hickory Dickory Dock, and Three Blind Mice by Three Blind Mice.

* 1920 – Two security guards are murdered during a robbery in South Braintree, Massachusetts.

* 2008 – Two skeletal remains found near Ekaterinburg, Russia are confirmed by Russian scientists to be the remains of Alexei Nikolaevich, Tsarevich of Russia and one of his sisters.

Two other alcohols whose uses are relatively widespread ( though not so much as those of methanol and ethanol ) are propanol and butanol.

Two and a half months were needed to reach the city, at the cost of repeated battles against the Dahomean warriors, especially the Amazons of the King.

After the establishment of the Commonwealth of Two Nations, republicans supported the status quo, of having a very weak monarch, and opposed those who thought a stronger monarchy was needed.

Two technical conditions are needed: the manifold has to be orientable, and the form has to be compactly supported in order to give a well-defined integral.

Two implications of this are that seeds generally run true to the cultivar, and that much smaller pollinator populations are needed because pollen only has to be moved within individual flowers.

* Two brothers, Tihtipihin and Kwatyat, were willingly swallowed by a monster because they needed to rescue their mother, who had already been swallowed.

Two years later in 1829 it was decided that a brick building was needed, and plans were made for a new courthouse ; but then an act of the legislature called for the county seat to be moved.

In 1901 the village of Two Harbors decided it needed a high school.

Two other sources of concern appeared in the early 1970s and suggested that there were other things that needed fixing as well.

Two brakesmen travelled on each down train, controlling the speed by the application of brakes as needed.

Two basic types of data are needed to construct the CPI: price data and weighting data.

Zelazny explained, “ I did not decide until I was well into the book that since there was really two time-situations being dealt with ( on-Road and off-Road — with off-Road being anywhen in history ), I needed only two chapter headings, One and Two, to let the reader know where we are.

Two antennas at each site were needed both for redundancy and because the beam widths of the large antennas needed were too small to encompass both the lunar orbiter and the lander at the same time.

Two additional letters are needed for genital surgeries.

On The Two Coreys Feldman and his wife, along with two other former teen stars, called on Haim in an effort to get him to admit he needed help.

Two officials were needed to conduct a criminal investigation.

Two officials were needed to conduct a criminal investigation.

Two courses in humanities, one each in math and science, two in social sciences, two in religious studies, foreign language as needed, and a diversity course are required of almost all students.

In the aftermath of World War Two, Britain was heavily indebted and needed to export large quantities of goods to earn foreign revenue ( mainly United States dollars ).

Two field receivers ( reading distance and direction ) are needed to establish the bird's position using triangulation from the ground.

Two important corollaries flow from this fact: ( 1 ) The ideas and methods of scientific management were exactly what was needed to be added to the American system of manufacturing to extend the transformation from craft work ( with humans as the only possible agents ) to mechanization and automation ; but also, ( 2 ) Taylor himself could not have known this, and his goals did not include the extensive removal of humans from the production process.

* Standard Two: The information literate student accesses needed information effectively and efficiently.

Two bells means that any possible help is needed.

Two dice and a flat bottomed container with a lid or a dice cup are needed.