COMPLEX DI-HYDRATE CALCIUM PHOSPHATE - GLUTARALDEHYDE: FORMULATION MECHANISM

The di-hydrate calcium phosphate CaHPO4, H2O (DCPD) reacts with glutaraldehyde OCH – (CH2)3 – CHO (GL) in an aqueous solution to give the complex OCH – (CH2)3 – CH(OH) – O – PO3Ca (DCPD-GL). In the solution, the complex appears in the form of hydrates (enolic stabilized by intramolecular isomery d, e, f and as the corresponding carboxylic acid g). In the solid state it is the enolic form wich dominates (cis and trans)

Etude de la reactivite microbiologique et de l’effet toxique sur carassius auratus du glutaraldehyde

p.p. 177-185Le ‘’glutaraldéhyde’’ est un composé largement utilisé dans l’industrie, comme biocide efficace.L’hygiène hospitalière l’utilise en grande quantité, pour ses propriétés physicochimiques (réactivité, tension de vapeur). Le ‘’glutaraldéhyde’’ se montre toxique pour la santé humaine et animale. L’étude des effets du ‘’glutaraldéhyde’’ sur le Carassius auratus, de la famille des cyprinadae d’eaux douces, met en évidence son extrême nuisance sur l’environnement. La Concentration Létale (CL50) déterminée en fonction du poids de ‘’cyprin doré’’, souligne la nocivité des solutions à base du glutaraldéhyd

Air Pollution from Diesel Particles and Chronic Obstruction Pulmonary Disease - CT Scan Study

Health problems have been observed in rabbits at low DEP concentration. The subject (animal) showed signs of chronic obstruction pulmonary disease (COPD). CT scan of the biopsy reveals significant emphysematous lesions. DEP grain causes inflammation of lung tissues around sites of deposition. Observations of tissue after formalin fixation reveal brown spots around the points of impact. It also reveals the double organic and inorganic aspect of DEPs. The organic compounds dissolve through slow diffusion in the lung physiological fluid while the inorganic part is partly handled by macrophages (phagocytosis)

Sinteza i karakterizacija novih magnetičnih zrna za adsorpciju salicilne kiseline iz vodene otopine

The study focuses on the synthesis of two adsorbent forms that were prepared: magnetic nonporous hybrid beads (MNPHB), and magnetic macroporous hybrid beads (MMPHB). The salicylic acid adsorption tests on MNPHB and MMPHB were carried out at a temperature of 25 °C, pH 4, adsorbent mass of 10 mg, and an initial concentration of 10 mg l–1. The adsorption capacity was found to be for MNPHP and MMPHB to 9 mg g–1 and 152 mg g–1, respectively. The adsorption kinetic was described by the pseudo-second order model and Freundlich isotherm for the MMPHB beads. This work is licensed under a Creative Commons Attribution 4.0 International License.Istraživanje je usmjereno na sintezu dvaju pripremljenih oblika adsorbenta: magnetskičkih neporoznih hibridnih zrna (MNPHB) i magnetičnih makroporoznih hibridnih zrna (MMPHB). Ispitivanja adsorpcije salicilne kiseline na MNPHB i MMPHB provedena su pri temperaturi od 25 °C, pH-vrijednosti 4, masi adsorbenta od 10 mg i početnoj koncentraciji salicilne kiseline od 10 mg l–1. Utvrđeno je da je adsorpcijski kapacitet MNPHP i MMPHB 9 mg g–1 odnosno 152 mg g–1. Kinetika adsorpcije opisana je modelom pseudo-drugog reda i Freundlichovom izotermom za zrna MMPHB. Ovo djelo je dano na korištenje pod licencom Creative Commons Imenovanje 4.0 međunarodna

ASPECT TOXICOLOGIQUE ET PHYSICOCHIMIQUE DU 1,5-DIPENTANAL

The 1,5-dipentanal is an important organic molecule: pedagogically, the molecule provides a range of interesting chemical reactions (Aldolisation, Michael, glycolysis, Cannizzaro, Mannich ...). It has the same reaction mechanisms for teaching the fundamentals of ecotoxicology in particular and chemistry in the environment in general. The extent of these applications between the fine disciplines (medical sciences, pharmacological chemistry, enzyme technology, technology of biological membranes and tissues, cytochemistry, histochemistry, immunochemistry, microscopy, X-ray ...) generates a rich multidisciplinary education first. Glutaraldehyde reacts with proteins, sugars and lipids feature free groups (-NH2). The amine group (NH2) reacts with the nucleophilic carbonyl electrophilic aldehyde (- CHO). The consequences of this mechanism in vivo are at the heart important pathophysiological (diabetes, renal failure, ...). Moreover, the miscibility with water (100%), high reactivity in physiological, highly evaporable terms (air contamination), chemical intermediate in industry and a must for all disinfection and sterilization of equipment. A good compromise between advantage and disadvantage impose a regulated management of the molecule as effluent or residue. It can not be rejected in sanitation, or natural mitan. The development of processes requested by the practical interest of the molecule and its management as harmful liquid waste is required

ASPECT TOXICOLOGIQUE ET PHYSICOCHIMIQUE DU 1,5-DIPENTANAL

The 1,5-dipentanal is an important organic molecule: pedagogically, the molecule provides a range of interesting chemical reactions (Aldolisation, Michael, glycolysis, Cannizzaro, Mannich ...). It has the same reaction mechanisms for teaching the fundamentals of ecotoxicology in particular and chemistry in the environment in general. The extent of these applications between the fine disciplines (medical sciences, pharmacological chemistry, enzyme technology, technology of biological membranes and tissues, cytochemistry, histochemistry, immunochemistry, microscopy, X-ray ...) generates a rich multidisciplinary education first. Glutaraldehyde reacts with proteins, sugars and lipids feature free groups (-NH2). The amine group (NH2) reacts with the nucleophilic carbonyl electrophilic aldehyde (- CHO). The consequences of this mechanism in vivo are at the heart important pathophysiological (diabetes, renal failure, ...). Moreover, the miscibility with water (100%), high reactivity in physiological, highly evaporable terms (air contamination), chemical intermediate in industry and a must for all disinfection and sterilization of equipment. A good compromise between advantage and disadvantage impose a regulated management of the molecule as effluent or residue. It can not be rejected in sanitation, or natural mitan. The development of processes requested by the practical interest of the molecule and its management as harmful liquid waste is required

Revaluation of activated sludge and chicken manure through composting by aerobic process

The activated sludge from the wastewater treatment plant (WWTP) of Tipaza, rich in plant sawdust, and chicken manure from the company Avicola, rich in nitrogenous matter, appears to be perfectly compatible for co-composting. The compost of these two biomasses gives a satisfactory result confirmed by the monitoring of the C/N ratio, a key indicator of the state of composts. Furthermore, the physicochemical parameters and spectral methods are in favor of the development of spreadable compos

Complex di-hydrate calcium phosphate - glutaraldehyde : formulation mechanism

The di-hydrate calcium phosphate CaHPO4, H2O (DCPD) reacts with glutaraldehyde OCH – (CH2)3 – CHO (GL) in an aqueous solution to give the complex OCH – (CH2)3 – CH(OH) – O – PO3Ca (DCPD-GL). In the solution, the complex appears in the form of hydrates (enolic stabilized by intramolecular isomery d, e, f and as the corresponding carboxylic acid g). In the solid state it is the enolic form wich dominates (cis and trans

Etude de la reactivite microbiologique et de l’effet toxique sur carassius auratus du glutaraldehyde

Le ‘’glutaraldéhyde’’ est un composé largement utilisé dans l’industrie, comme biocide efficace.L’hygiène hospitalière l’utilise en grande quantité, pour ses propriétés physicochimiques (réactivité, tension de vapeur). Le ‘’glutaraldéhyde’’ se montre toxique pour la santé humaine et animale. L’étude des effets du ‘’glutaraldéhyde’’ sur le Carassius auratus, de la famille des cyprinadae d’eaux douces, met en évidence son extrême nuisance sur l’environnement. La Concentration Létale (CL50) déterminée en fonction du poids de ‘’cyprin doré’’, souligne la nocivité des solutions à base du glutaraldéhyd

Microstructure and chemical composition of deposited particulate matter from gasoline and diesel vehicle exhaust emissions

A comprehensive physicochemical characterization of transport-emitted aerosols containing in vehicle exhaust emissions derived from the combustion of fuels such as diesel, premium gasoline, and unleaded gasoline was performed in this study by employing a range of analytical techniques (Laser granulometry, X-ray Fluorescence (XRF), Fourier Transform Infrared (FTIR), X-ray diffraction (DRX), Scanning Electron Microscopy (SEM), and Thermogravimetry). The X-ray diffractogram of diesel (D) derived aerosols showed an amorphous structure while those of unleaded gasoline (UG) and premium gasoline (PG), showed amorphous crystalline phases. The chemical composition of D, PG and UG derived particles was dominated by aliphatic C-H groups of alkanes with relatively low C=O groups of carboxylic acids, ketones, aldehydes, esters, lactones, and sulphate (SO4 2-) inorganic salts. The nitrogen-containing functionality (NO3-) was specific to particles of PG and UG. Laser particle size analysis showed fine particle sizes (Range) generated from diesel exhausts, thus making them dangerous when inhaled, as they can penetrate deeply into the human airways and become incorporated into the blood stream damaging other viscera