Hexagonal crystal system

Rubisco exists in four forms. Form I Rubisco is a hexadecamer, which is repeated four times in the basic structural motif, a dimer of large subunits, to form a catalytic core of L8, with small subunits on the top and bottom of this core (L8S8).14–16 Form II Rubisco is a simple dimer of large subunits, ranging from L2-8, sharing 25–30% identity to the L subunits of Form I Rubisco. This structure is similar to the structure of the basic dimer of the Form I Rubisco despite some differences in catalytic properties.16,17 Form III Rubisco is the dimers of large subunits in either an L2 or (L2)5 and is found only in archaea. Form IV Rubisco (Rubisco-like Protein) is a simple dimer of large subunits (L2) that do not use CO2 as a major carbon source.18,19 Photosynthetic bacteria are special types of bacteria that contain light absorption part and reaction centers and convert CO2 into carbohydrate molecules. Cyanobacteria, one of the photosynthetic bacteria, consist of chlorophyll, whereas the other forms of photosynthetic bacteria consist of bacteriochlorophyll. Although bacteriochlorophyll is similar to chlorophyll, it absorbs light of a broad wavelength than chlorophyll. In addition, because bacteria that contain bacteriochlorophyll do not use water as the electron donor, they do not produce oxygen. Bacteria such as purple and green sulfur bacteria use sulfur as the electron acceptor. Purple nonsulfur bacteria constitute a nontaxonomic group of versatile organisms, in which most of…

She rises from her chair and grabs a spherical green object from a nearby shelf. She sets it on the table with a thump. “Is that a crystal ball?” Will asks. The sound of his voice sends my heart into a downward spiral. Heat rises up my spine. Whatever is in the air in this place, it’s making my emotions go haywire. The crystal ball suddenly sparks into a cloud of green, producing sparkles within it. The woman laughs at the sight. “So much attraction! I’ve never witnessed the crystals igniting so…

create a model based off the crystal structure of the endonuclease domain of Bacillus subtilis MutL. This structure, in particular, exposes the presence of zinc in the binding site which is important for the MMR function of BsMutL in vivo. From there, they proposed a model describing the association of MutS and DNA polymerase III, β clamp with MutL, and nicking of a synthesized DNA strand. The importance of MutL is in its united effort with MutS to recognize mismatches and interactions of the β…

TITLE: QUALITATIVE PHASE IDENTIFICATION & CRYSTAL STRUSTURE ANALYSIS OF ISONICOTINAMIDE POLYMORPHS. INTRODUCTION The science of crystallography is important in stability studies and determination of solid state molecule or particles. Isonicotinamide (pyridine -4- carboxamide) is the amide form of isonicotinic acid which exists as different polymorphs. Isonicotinamide finds extensive use in the pharmaceutical industry because of its good anti-tubercular, anti-bacterial, anti-pyretic and…

The manufacturers of sealants typically ship their products as a powder, and contractors prepare the liquid sealcoating as it is needed to complete jobs. The mixture requires adding water, additives and sand in the correct proportions if the sealant is to perform as it should. Although some people believe that sand is merely a filler that is added to reduce the amount of dry sealant needed, nothing could be further from the truth. Sand Provides Important Safety Features Sealcoating without…

The crystal size is also affected by the rate of cooling and larger crystals were shown to be formed when fat was cooled at a slower cooling rate83. However the samples were not subjected to changes in the rate of cooling in this study. At higher temperatures (or lower supercooling conditions) due to decrease in the driving force, less crystals are formed although the crystals are larger in size as compared to those formed at lower temperatures83. At lower temperatures, due to the higher driving…

3.4. Friction Characteristics of the NCD, MCD and boron doped NCD Coatings against Alumina Balls The friction coefficient curves of NCD, MCD and boron-doped diamond films sliding with Al2O3 balls are shown in figure 4, figure 5 and figure 6, respectively, for a sliding speed of 8 m/s and a load of 1N, 5N and 10N, respectively. Figure 4 (a), figure 5 (a) and figure 6 (a) show the friction coefficient of NCD, MCD and BDNCD at 1 N, respectively. Figure 4 (b), figure 5 (b) and figure 6 (b) show…

Granite is widely known as the hardest building stone in the world. So, just why is this reliable material so strong? Today, the stone countertop experts at Rocky Mountain Granite & Marble in Webster, NY, explain what you need to know: A Sturdy Composition Granite is created when molten rock solidifies under the earth’s crust. Composed of Quartz, Mica, Feldspar, and other strong minerals, it’s only natural the product is so sturdy. In fact, quartz and feldspar are tougher than steel. The only…

Abstract: The objective of this experiment was to synthesize aspirin from salicylic acid and acetic anhydride. The general theory behind this experiment was to study the synthesis of a drug from organic materials. During the experiment, esterification had occurred between reactants salicylic acid and acetic anhydride. Then, phosphoric acid would catalyze the reaction and water would be added to decompose the remaining acetic anhydride. Through the process of filtration, aspirin crystals were…

The main purpose of this experiment is to purify an impure solid by the technique of recrystallization. This technique involves several steps, selecting an ideal solvent, dissolving the compound in a minimum amount of boiling hot solvent, filtering insoluble impurities while the solution is hot; crystallizing the purified compound, and isolate the pure compound by vacuum filtration . The unknown used in the experiment was #4, which were white crystals. In order to determine the ideal solvent…