http://www.chtf.stuba.sk/~szolcsanyi/education/files/Organicka%20chemia%20II/Prednaska%208_Aminokyseliny%20a%20peptidy/Doplnkove%20studijne%20materialy/Amide%20bond%20formation/Amide%20bond%20formation.pdf

Amide bond formation and peptide coupling

The optoelectronic and physicochemical properties of nanoscale matter are a strong function of particle size. Nanoparticle shape also contributes significantly to modulating their electronic properties. Several shapes ranging from rods to wires to plates to teardrop structures may be obtained by chemical methods; triangular nanoparticles have been synthesized by using a seeded growth process. Here, we report the discovery that the extract from the lemongrass plant, when reacted with aqueous chloroaurate ions, yields a high percentage of thin, flat, single-crystalline gold nanotriangles. The nanotriangles seem to grow by a process involving rapid reduction, assembly and room-temperature sintering of 'liquid-like' spherical gold nanoparticles. The anisotropy in nanoparticle shape results in large near-infrared absorption by the particles, and highly anisotropic electron transport in films of the nanotriangles.

Biological synthesis of triangular gold nanoprisms

Many scientific papers have been written concerning gas sensors for different sensor applications using several sensing principles. This review focuses on sensors and sensor systems for gaseous ammonia. Apart from its natural origin, there are many sources of ammonia, like the chemical industry or intensive life-stock. The survey that we present here treats different application areas for ammonia sensors or measurement systems and different techniques available for making selective ammonia sensing devices. When very low concentrations are to be measured, e.g. less than 2 ppb for environmental monitoring and 50 ppb for diagnostic breath analysis, solid-state ammonia sensors are not sensitive enough. In addition, they lack the required selectivity to other gasses that are often available in much higher concentrations. Optical methods that make use of lasers are often expensive and large. Indirect measurement principles have been described in literature that seems very suited as ammonia sensing devices. Such systems are suited for miniaturization and integration to make them suitable for measuring in the small gas volumes that are normally available in medical applications like diagnostic breath analysis equipment.

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Ammonia sensors and their applications - a review

Antimicrobial and phytochemical studies on 45 Indian medicinal plants against multi-drug resistant human pathogens

The process of microbial mineral plugging in porous media is common in nature. We examined physical and biochemical properties of CaCO3 precipitation induced by Bacillus pasteurii, an alkalophilic soil microorganism. X-ray diffraction analysis quantified the composition of the mineral deposited in sand and identified the CaCO3 crystal as calcite. Examination by scanning electron microscopy identified bacteria in the middle of calcite crystals, which acted as nucleation sites. The rate of microbiological CaCO3 precipitation correlated with cell growth and was significantly faster than that of chemical precipitation. Biochemical properties of urease (urea amidohydrolase, E.C. 3.5.1.5) from B. pasteurii that was indirectly involved in CaCO3 precipitation were examined to understand the kinetics of the microbiological process. Urease from B. pasteurii exhibited a relatively low affinity for urea at pH 7.0 with a Km of 41.6 mM and Vmax of 3.55 mM min−1 mg−1 protein and increased affinity at pH 7.7 with a Km of 26.2 mM and Vmax of 1.72 mM min−1 mg−1 protein. Results of kinetic studies indicate that urease activity and its affinity to urea are significantly high at the pH where calcite precipitation is favorable. Our findings further suggest a potential use of the microbial calcite precipitation process in remediation of the surface and subsurface of porous media.

Microbiological precipitation of CaCO3

1. Organic synthesis 2. Experimental techniques. 3. Spectroscopic methods. 4. Solvents and reagents. 5. Aliphatic compounds. 6. Aromatic compounds. 7. Selected alicyclic compounds. 8. Selected heterocyclic compounds. 9. Investigation and characterisation of organic compounds. 10. Physical constants of organic compounds.

Vogel's Textbook of Practical Organic Chemistry

1. Preface to First Edition. 2. Preface to Sixth Edition. 3. Safety Units. 4. Reagent Purity. 5. Introduction. 6. Fundamental Theoretical Principles of Reactions in Solution. 7. Common Apparatus & Basic Techniques. 8. Statistics, Introduction to Chemometrics. 9. Sampling. 10. The Basis of Separative Methods. 11. Thin Layer Chromatography. 12. Liquid Chromatography. 13. Gas Chromatography. 14. Titrimetric Analysis. 15. Gravimetric Analysis. 16. Thermal Analysis. 17. Direct Electroanalytical Methods. 18. Nuclear Magnetic Resonance Spectroscopy. 19. Atomic Absorption Spectroscopy. 20. Atomic Emission Spectroscopy. 21. Molecular Electronic Spectroscopy. 22. Vibrational Spectroscopy. 23. Mass Spectrometry. Appendices.

Vogel's textbook of quantitative chemical analysis

* Introduction * Experimental Techniques * Reactions of the Cations * Reactions of the Anions * Selected Tests and Separations * Reactions of Some Less Common Ions

Vogel's Qualitative Inorganic Analysis

Vogel's Textbook of Macro and semimicro qualitative inorganic analysis

Vogel's textbook of practical organic chemistry, including qualitative organic analysis , Vogel's textbook of practical organic chemistry, including qualitative organic analysis , کتابخانه دیجیتال جندی شاپور اهواز

Arthur I. Vogel

Papers

Vogel's Textbook of Practical Organic Chemistry

Vogel's textbook of quantitative chemical analysis

Vogel's Qualitative Inorganic Analysis

Vogel's Textbook of Macro and semimicro qualitative inorganic analysis

Vogel's Textbook of Practical Organic Chemistry, Including Qualitative Organic Analysis