Automatic Waste Segregation System

<p>This study addresses the pressing issue of disorganized waste disposal in both urban and rural areas by introducing an Arduino</p><p>Uno-based automatic waste segregation system. In many communities, waste is often discarded without consideration for its</p><p>category, leading to environmental pollution and inefficiency in waste management. To tackle this problem, our system</p><p>employs sensors and mechanical components to efficiently separate wet and dry waste into distinct compartments. The system</p><p>operates as follows: an IR sensor detects the presence of an object in a dumpster, and a moisture sensor assesses the moisture</p><p>content of the object. Based on this moisture content measurement, the system classifies the waste as either wet or dry and then</p><p>directs it into the appropriate bins. By automating this process, our system significantly reduces the quantities of hazardous</p><p>waste and the emission of toxic gases like carbon dioxide and methane, thereby contributing to a cleaner environment.</p><p>Moreover, our study addresses a critical issue encountered in previous waste segregation systems, where metal dumpsters were</p><p>used and frequently corroded due to moisture content. In our approach, we employ corrosion-resistant materials to ensure the</p><p>longevity and durability of the waste segregation system, reducing maintenance requirements and costs. Overall, our system not</p><p>only enhances waste management practices but also minimizes the need for manual labor, making it a valuable addition to</p><p>waste disposal infrastructure in both urban and rural settings.</p><p>IJSRED - International Journal of Scientific Research and Engineering Development</p&gt

Nickel(II) chelates with N-phenethyl-iminodiacetate(2-)-like ligands: Synthesis, crystal structure and spectroscopic studies

806-811The stoichiometric reactions between Ni(II) hydroxy-carbonates and N-p-(R)-H2pheida derivatives (R = MeO or F for MOpheida or Fpheida, respectively) yield two binary compounds [Ni(MOpheida)(H2O)3] (1) and [Ni(Fpheida)(H2O)3] (2). The crystal of compounds 1 and 2 are iso-type; space group P21/c. Our crystallographic results revealed that both studied metal-chelates have molecular structure and the used p-R substituents on the pheida skeleton yield the same structural features. The IDA moiety of pheida-like ligands exhibit the fac-NO2 conformation (1 & 2). Crystal structure of H2Fpheida free acid have also been reported herein

Nickel(II) chelates with N-phenethyl-iminodiacetate(2-)-like ligands: Synthesis, crystal structure and spectroscopic studies.

The stoichiometric reactions between Ni(II) hydroxy-carbonates and N-p-(R)-H2pheida derivatives (R =  MeO or F for  MOpheida or Fpheida respectively) yield two novel binary compounds [Ni(MOpheida)(H2O)3] (1) and [Ni(Fpheida)(H2O)3] (2). The crystal of compounds 1 and 2 are iso-type; space group P21/c. Our crystallographic results revealed that both studied metal-chelates have  molecular structure and the used p-R substituents on the pheida skeleton yield the same structural features. The IDA moiety of pheida-like ligands exhibit the fac-NO2 conformation (1 & 2). Crystal structure of H2Fpheida free acid have also been reported herein

Kumar Patela†, Alicia Domınguez-Martına, Duane Choquesillo-Lazarteb, Josefa Marıa Gonzalez-Perezaand Juan Niclos-Gutierreza

From the reaction of Co(II) hydroxy-carbonates and N-p-(R)-phenethyliminodiacetic acids (Hpheida, R = H and HMOpheida, R = CHO) two binary complexes have been obtained in aqueous media. The crystal pattern of [Co(pheida)(HO)]·1.5HO (1) (monoclinic, space group C2/c) differs from the related non-hydrated crystal of [Co(MOpheida)(HO)] (2) (monoclinic, space group P2/c). Both Co(II) complexes display distorted octahedral geometry imposed by 3d electronic configuration. Our crystallographic results reveal that the metal chelates have a molecular structure and the used methoxy-substituent on the pheida skeleton yield different structural features. The iminodiacetic acid-arms [IDA] of pheida-like ligands adopt fac-NO conformation. For both chelators 1 and 2, single-point energy was calculated using restricted and/or unrestricted Hartree–Fock/BP/B3LYP functional. The analytical frequency, electronic absorption, and HOMO–LUMO energy gap were calculated using B3LYP functional with orbital basis set def2-SVP or def2-TZVP (for 2) along with the auxiliary basis set def2/J. The quantum chemical calculated geometry parameters are compared with their corresponding X-ray crystallographic data. The optical band gap (E ) arises due to the electronic transitions. The direct and indirect band gap energy measured 3.26, 3.19 eV for 1 and 3.39, 3.35 eV for 2, respectively, reflecting their semi-conducting nature. Crystal structure for HMOpheida acid also reported herein.Financial support of Junta de Andalucía (FQM-283 Research Group) and Factoría de Cristalización are acknowledged. Dheerendra Kumar Patel thanks the Spanish Agency for International Cooperation and Development (AECID) for a research grant. This study was also supported by Agencia de Innovación y Desarrollo de Andalucía. Dheerendra Kumar Patel thanks the University of Granada for his stay at Prof Juan Niclós-Gutiérrez research group

Metal ion binding modes of hypoxanthine and xanthine versus the versatile behaviour of adenine

The metal coordination patterns of hypoxanthine, xanthine and related oxy-purines have been reviewed on the basis of the structural information available in the Cambridge Structural Database (CSD), including also the most recent reports founded in SciFinder. Attention is paid to the metal ion binding modes and interligand interactions in mixed-ligand metal complexes, as well as the possibilities of metal binding of the exocyclic-O atoms. The information in CSD is also reviewed for the complexes of adenine in cationic, neutral and anionic forms with every metal ion. In contrast to the scarce structural information about hypoxanthine and related complexes, large structural information is available for adenine complexes with a variety of metals that reveals some correlations between the crystal-chemical properties of metal ions. Three aspects are studied in deep: the coordination patterns, the interligand interactions influencing the molecular recognition in mixed-ligand metal complexes and the connectivity between metals for different adenine species, thus supporting its unique versatility as ligand. When possible, the overall behaviour showed by adenine metal complexes is discussed according to the HSAB Pearson criteria and the tautomeric behaviour observed for each protonated species of adenine. The differences between the roles of adenine and the referred oxypurines ligands are underlined