Academic literature on the topic 'Sodium cyanide'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Sodium cyanide.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Sodium cyanide"
1
Корабельников, Д. В., И. А. Федоров, and Ю. Н. Журавлев. "Сжимаемость и электронные свойства цианидов металлов." Физика твердого тела 63, no. 7 (2021): 874. http://dx.doi.org/10.21883/ftt.2021.07.51036.044.
Full textAbstract:
The compressibility and electronic properties of metal cyanides are investigated within the density functional theory taking into account the dispersion van der Waals interaction. It was shown that gold cyanide has a low linear compressibility (less than 0.1% at a pressure of 1 GPa) and a high linear modulus (~ 1200 GPa) along the -Au-CN-Au-CN- chains. Silver cyanide exhibits negative linear compressibility, which correlates with the compressibility of Ag-N coordination bonds. For sodium cyanide, the linear compressibility along the C - N covalent bonds is greater than for gold and silver cyanides, while the elastic anisotropy is less. Unlike sodium cyanide, for gold and silver cyanides, cation-anionic bonds (Au-N, Au-C and Ag-N, Ag-C) are partially covalent in nature, and the upper valence states correspond mainly to the states of cations. The band gap of gold cyanide is smaller than that of silver and sodium cyanides. The band gap widths of gold and silver cyanides significantly decrease with increasing pressure, which indicates the possibility of metallization at sufficiently high pressures.
2
Skowroń, Jolanta, and Katarzyna Konieczko. "Hydrogen cynide and cyanide salts: sodium, potassium, calcium, as CN-. Documentation of proposed values of occupational exposure limits (OELs)." Podstawy i Metody Oceny Środowiska Pracy 33, no. 1(91) (March 30, 2017): 5–62. http://dx.doi.org/10.5604/1231868x.1232633.
Full textAbstract:
Hydrogen cyanide (HCN) and its salts: potassium cyanide (KCN), sodium cyanide (NaCN) and calcium cyanide [Ca(CN2)] are very toxic. Hydrogen cyanide at ambient conditions is a colourless liquid or a colourless gas with the characteristic odour of bitter almonds. Sodium, potassium and calcium cyanides are white hygroscopic, crystalline solids with a slight HCN odour. Hydrogen cyanide is used mainly in a fumigation of ships, buildings, orchards and various foods, in electroplating, in the production of chelating agents such as EDTA, and in metal treatment processes. It is also used as a chemical intermediate. Cyanides are used in the extraction and recovery of gold and silver from ores, the heat treatment of metals, and electroplating. They are also precursors in chemical syntheses. Workers from metal, electrochemical, plastics, pharmaceutical, textile, chemical and food industries are exposed to these compounds. In 2008–2013, there were no workers exposed to the concentration of hydrogen cyanide and sodium, potassium and calcium cyanides exceeding the maximum admissible ceiling concentration MAC(C) 5 mg/m3 (the national database maintained by the Regional Sanitary Station in Bydgoszcz). Hydrogen cyanide and cyanides are irritating to mucous membranes and skin. They are absorbed by inhalation, dermal and oral exposure. The acute hydrogen cyanide and cyanides poisoning indicate a great danger and hazard, because these compounds are quickly absorbed into the body and their effects are present within a few minutes after the start of exposure. Exposure to sodium cyanide at a concentration of 286 mg/m3 or to hydrogen cyanide at a concentration greater than 300 mg/m3 for 1 min may be fatal. Sodium, potassium or calcium cyanides at concentrations of 25 mg/m3 are direct hazards to life and health of workers if exposure lasts about 30 min and without respiratory protection. For hydrogen cyanide this value was established as 56 mg/m3. The development of symptoms of acute poisoning by hydrogen cyanide or cyanides in humans occurs in three phases: breathlessness and excitement, convulsions and paralysis. The results of studies of subchronic and chronic exposures of workers to cyanides by inhalation indicate that symptoms of exposure were associated with changes in the central nervous system (headache, weakness, changes in the sensation of taste and smell) and damage to the thyroid (enlargement, changes in uptake of iodine, elevated concentration of thyroid stimulating hormone TSH and a reduction of thyroid hormones T3 and T4). Other studies suggest that chronic exposure to hydrogen cyanide in the hardening plant of metals caused decrements in lung functions among workers. Hydrogen cyanide and cyanides, both in aqueous solution, applied to the conjunctival sac or on the skin is quickly absorbed into the body of animals in amounts sufficient to cause toxic effects and death. In rats and mice treated with sodium cyanide in drinking water at a dose of 4.5 mg/kg bw/day for 13 weeks, no significant changes in biochemical and haematological parameters of peripheral blood and histopathological findings in the internal organs were observed. There were no pathological changes in the respiratory, cardiovascular, nervous system and kidneys in rats which were feed with hydrogen cyanide over two years. Calculated NOAEL was approximately 10.4 mg/kg body weight. There is no available data on the carcinogenicity of hydrogen cyanide and cyanides in human and animals. Positive effects were obtained in one study only, in which hydrogen cyanide was tested with Salmonella typhimurium strain TA 100 in the absence of metabolic activation, while the other strains employed in this study yielded negative results. Cyanides did not show mutagenic activity in the tests in vitro and in vivo. On the basis of the studies on hamsters, teratogenic effects of sodium cyanide were observed. This compound was toxic for pregnant mothers and caused an increase in fatal resorption and malformations in an offspring. The results of the study of workers exposed to hydrogen cyanide and cyanides and with changes in thyroid were the basis for calculating MAC (NDS) value. The LOAEL value was establishes as a concentration of 4.7 mg/m3. The MAC of 1 mg/m3 (calculated CN–) was established for hydrogen cyanide and the inhalable fraction of sodium, potassium, calcium cyanides was accepted. Due to totally different mechanism of action of hydrogen cyanide and cyanides (sodium, potassium, calcium) in chronic exposure (effects on the thyroid gland) and in the acute exposure, which is primarily associated with inhibition enzymatic system of cytochrome c oxidase, which prevents cells from using oxygen (histotoxic hypoxia), for these compounds the ceiling value MAC(C) of 5 mg/m3 was not changed. Such an approach is a deviation from the basic methodology adopted by the Group of Expert and the Interdepartmental Commission for MAC and MAI. MAC and ceiling MAC(C) values for these substances should be establish due to the different effects of critical action and mechanisms of action in the acute and chronic condition. This approach is consistent with the DECOS Committee (Dutch Expert Committee on Occupational Standards) from 2002. According to the committee, the acute human data show the most sensitive effect, i.e., death. The steepness of the dose-response relationship and the severity of the acute effects in humans imply at the same time that utmost care should be taken to prevent this exposure level from being exceeded, not even for a short time. Therefore, the committee proposed to establish a ceiling value for the acute health effects of 10 mg/m3 for hydrogen cyanide. The Scientific Committee on Occupational Exposure Limit Values (SCOEL) proposed an OEL value of 1 mg/m3. However, since the acute effects in humans are severe (i.e., death) and show a rather steep dose-response relationship, peak exposures should be avoided. Based on the steepness of the dose-response relationship and the severity of the acute effects in humans a STEL of 5 mg/m3 is recommended as CN– from any combination of the three compounds. Based on the very high skin permeability measured for hydrogen cyanide and cyanide anions in aqueous solutions, a skin notation is recommended for hydrogen cyanide and sodium, potassium, calcium cyanides.
3
Hosetti, B. B., P. N. Dube, M. S. Prashanth, and A. Shwetha. "Acute toxicity of metal cyanides to Indian major carp Labeo rohita (Hamilton)." Biotehnologija u stocarstvu 26, no. 3-4 (2010): 267–77. http://dx.doi.org/10.2298/bah1004267h.
Full textAbstract:
Static renewal bioassay tests were carried out to determine the acute toxicity (LC50) of metal cyanides to the Indian major carp Labeo rohita. The 96 hour LC50 value for the sodium cyanide, zinc cyanide and copper cyanide to the fish L. rohita were 0.32 mg/L 0.35 mg/L, and 1.1 mg/L respectively. Among the metal cyanide tested, sodium cyanide is found to be more toxic than the other cyanide complexes. In general behavioral responses of the fishes exposed to cyanide included uncontrolled swimming, erratic movements, loss of balance, moving spiral fashion with sudden jerky movements, vertical movements lying on the sides of the test chamber and rapid flapping of the opercular movements with opened mouth finally settles to the bottom.
4
Young, Jay A. "Sodium Cyanide." Journal of Chemical Education 80, no. 9 (September 2003): 997. http://dx.doi.org/10.1021/ed080p997.
Full text
5
Hall, VA, and JM Guest. "Sodium nitroprusside-induced cyanide intoxication and prevention with sodium thiosulfate prophylaxis." American Journal of Critical Care 1, no. 2 (September 1, 1992): 19–25. http://dx.doi.org/10.4037/ajcc1992.1.2.19.
Full textAbstract:
Sodium nitroprusside is an antihypertensive agent used frequently in the critical care setting. Recently, the Food and Drug Administration (FDA) published a report that led to a labeling change emphasizing the pharmacokinetics of nitroprusside with metabolism to highly toxic cyanide. Although evidence validates that cyanogenesis occurs with nitroprusside administration, prevention and treatment of cyanide poisoning is rarely instituted in clinical practice. Simultaneous infusion of thiosulfate with nitroprusside provides the sulfur donor necessary to prevent cyanide accumulation. Cyanide combines with thiosulfate to form the less toxic sodium thiocyanate, which is then excreted. A 10:1 ratio of nitroprusside to thiosulfate in the infusion eliminates the possibility of cyanide intoxication without altering the efficacy of nitroprusside.
6
Meillier, Andrew, and Cara Heller. "Acute Cyanide Poisoning: Hydroxocobalamin and Sodium Thiosulfate Treatments with Two Outcomes following One Exposure Event." Case Reports in Medicine 2015 (2015): 1–4. http://dx.doi.org/10.1155/2015/217951.
Full textAbstract:
Cyanide is rapidly reacting and causes arrest of aerobic metabolism. The symptoms are diffuse and lethal and require high clinical suspicion. Remediation of symptoms and mortality is highly dependent on quick treatment with a cyanide antidote. Presently, there are two widely accepted antidotes: sodium thiosulfate and hydroxocobalamin. These treatments act on different components of cyanide’s metabolism. Here, we present two cases resulting from the same source of cyanide poisoning and the use of both antidotes separately used with differing outcomes.
7
Razmakhnin, KK, and PA Vasiljuk. "Technological and environmental features of heap leaching of Delmachik gold-bearing ores deposit." IOP Conference Series: Earth and Environmental Science 991, no. 1 (February 1, 2022): 012044. http://dx.doi.org/10.1088/1755-1315/991/1/012044.
Full textAbstract:
Abstract The problem of gold ores hydrometallurgical processing with using sodium cyanide is evaluated. The prospects for the development of the use of cyanide-free reagents for leaching gold from ores are studied. The possibility of introducing a cyanide-free environmentally friendly reagent instead of the widely used sodium cyanide was determined. The results of experimental studies on the comparability of the processing of gold ores using sodium cyanide and a reagent based on sodium cyanoate are obtained. The optimal parameters of the technological process for the extraction of gold from ores using a cyanide-free reagent are established.
8
Vasyunina, N. V., I. V. Dubova, S. P. Baksheev, M. R. Kovel, and V. V. Makarova. "Generation of sodium cyanide by coal gasification for gold recovery factories." Proceedings of Irkutsk State Technical University 25, no. 4 (September 1, 2021): 488–97. http://dx.doi.org/10.21285/1814-3520-2021-4-488-497.
Full textAbstract:
The aim was to assess the technological feasibility of generating sodium cyanide by coal gasification, to study the effects of the process parameters (temperature, experiment duration, coal type) on the concentration of sodium cyanide in the resulting solutions, as well as to identify optimal modes of the process. Experiments were carried out on a laboratory setup consisting of a tubular cylindrical furnace equipped with a working compartment in the form of a corundum tube. Lignite and charcoal, preliminarily crushed to increase the specific surface area, were investigated. A solution of sodium cyanide was produced by sorption of gaseous hydrocyanic acid (a syngas component) with a sodium carbonate solution. A NaOH solution (pH = 10) installed in an ice bath was used in the system of absorbers. The content of sodium cyanide in the solution was determined by the titrimetric method. The HSC Chemistry 5.1 software package was used for thermodynamic calculations. During the gasification of charcoal in the temperature range 600–800oC, sodium cyanide solutions with a concentration of 0.03–0.08 wt% were obtained. An increase in temperature from 600 to 900oC led to a 4-fold decrease in the concentration of sodium cyanide in an alkaline solution, under the same duration of the experiments. A regression equation was derived for the dependence of the NaCN concentration in solution on the temperature of coal gasification and the duration of the process. It was shown that the generation of sodium cyanide by coal gasification under laboratory conditions yields sodium cyanide concentrations in solution comparable to those used for gold cyanidation at gold recovery plants. The installation of sodium cyanide generation lines directly at the production areas of gold recovery plants will reduce the production costs by eliminating expenses for purchasing, transporting and storing reagents.
9
Wang, Siyu, Xiangcheng Wang, and Yunping Hao. "Preparation of Zinc Cyanide and Elimination of Free Alkali in Cyanide." E3S Web of Conferences 233 (2021): 01110. http://dx.doi.org/10.1051/e3sconf/202123301110.
Full textAbstract:
Zinc cyanide can be prepared by double decomposition reaction of sodium cyanide or potassium cyanide with zinc chloride. Before the preparation of zinc cyanide, it is necessary to remove the free alkali in the raw material sodium cyanide or potassium cyanide. Magnesium chloride is used to remove the free alkali in sodium cyanide or potassium cyanide. The concentration of cyanide ion in potassium cyanide solution under different conditions is measured. The results show that magnesium chloride can not only remove the original free alkali in potassium cyanide, but also promote the hydrolysis of potassium cyanide to produce new free alkali and react with it to form new precipitate. By analyzing the components of the precipitate, it is determined that the main components in the precipitation are Mg(OH)2 and MgCO3. The final conclusion: after the free alkali in cyanide is removed by magnesium chloride, the solution must be quickly put into the double decomposition reaction to reduce the further loss of cyanide ion; In the preparation of zinc cyanide, the adding order needs to be noted: the cyanide aqueous solution must be added into the zinc chloride solution to ensure the excess of zinc chloride.
10
Ibebunjo, C., Beryl P. Kamalu, and E. C. Ihemelandu. "Comparison of the effects of cassava (Manihot esculenta Crantz) organic cyanide and inorganic cyanide on muscle and bone development in a Nigerian breed of dog." British Journal of Nutrition 68, no. 2 (September 1992): 483–91. http://dx.doi.org/10.1079/bjn19920106.
Full textAbstract:
Effects of cassava (Manihot esculenta Crantz)-borne organic cyanide and inorganic cyanide in the form of sodium cyanide on bone and muscle development were investigated in eighteen dogs of Nigerian breed. After 16 weeks of stabilization in the laboratory from the time of purchase when the dogs were fed on the same diet, they were randomly assigned to three experimental groups of six dogs each. The control group was fed on rice while the other two groups were fed on either cassava (gari) or rice plus cyanide. The three diets were made isoenergetic and isonitrogenous by varying the quantity of meat incorporated into them. The results obtained after 14 weeks of feeding the respective diets indicated that there was retardation of muscle development in the gari-fed dogs. This may have resulted from gluconeogenesis from muscle protein associated with suppression of production of insulin by the pancreas in this group. The results indicated also that the effects of inorganic dietary cyanides on muscle development were different. Both forms of dietary cyanides, however, had no adverse effect on bone development
Dissertations / Theses on the topic "Sodium cyanide"
1
ARELLANO, MERYELEM TANIA CHURAMPI. "TREATMENT OF EFFLUENTS CONTAINING CYANIDE BY SINGLET OXYGEN GENERATED BY THE REACTION OF HYDROGEN PEROXIDE AND SODIUM HYPOCHLORITE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=21883@1.
Full textAbstract:
PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
O presente trabalho teve como objetivo estudar a viabilidade da aplicação do processo oxidativo avançado que utiliza oxigênio singlete, gerado quimicamente por peróxido de hidrogênio e hipoclorito de sódio, para oxidar o cianeto livre. O processo foi estudado em batelada, simulando uma solução sintética de KCN com características de pH e concentração similares às condições típicas de um efluente real. A combinação aquosa do H2O2 e NaClO para gerar oxigênio singlete, foi eficaz para oxidar o cianeto, em uma faixa de pH 9 a 11. Com concentrações iniciais de cianeto de 10, 100, 500 e 1000 mg/L, e proporção molar de [H2O2maisNaClO]:[CN-]igual a 2:1, foi possível atingir uma concentração final de cianeto menor do que 0,2 mg/L, com 98,9 por cento e 99 por cento de remoção, a pH 11 e 9, em apenas 2 e 20 minutos, respectivamente. Quando o cianeto foi oxidado por H2O2 e NaClO separadamente, para as mesmas condições experimentais, o peróxido de hidrogênio apenas oxidou o cianeto em 30 por cento e 26 por cento, a pH 9 e 11, respectivamente, em 60 minutos de reação. Quando o cianeto foi oxidado com NaClO, o cianeto atingiu uma concentração final menor do que 0,2 mg/L, com uma remoção de 98 por cento e 99 por cento, a pH 9 e 11, em 60 e 5 minutos de reação, respectivamente.
The synergistic combination of hydrogen peroxide and hypochlorite ion in water results in formation of the highly oxidizing intermediate species singlet oxygen (1O2), which is effective in the oxidation of free cyanide (CN-) in water. The process was fast and efficient over the studied pH range of 9-11, and up to an initial CN- concentration of 1000 mg/L. For an initial [CN-] equal 100 mg/L, pH equal 9, and molar ratio ([H2O2]more[NaClO])/[CN-] equal 1:1 it was possible to achieve a final concentration of [CN-] lower than 0.2 mg/L (99.8 per cent reduction) in t equal 20 min at 25 degrees celsius in a batch reaction. By comparison, the same reaction with either of the separate oxidants (H2O2 or NaClO) at the same molar ratio of oxidant/CN- equal 1:1 resulted in a maximum of 87 per cent breakdown of the cyanide (using NaClO) for the same 20 min reaction period.
2
Lazarus, Philip. "Mechanism of decrease of protein synthesis by sodium cyanate in murine P388 leukemia cells." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75367.
Full textAbstract:
The objective of this study was to examine the inhibition of protein synthesis in murine P388 cells by sodium cyanate (NaOCN). The characterization of amino acid transport systems present in P388 cells provided a basis for some of these studies. NaOCN had no effect on the kinetics of amino acid transport systems L, A, ASC, N, or y$ sp+.$ The decrease in protein synthesis seen after NaOCN treatment was not secondary to alterations in amino acid metabolism or changes in nucleotide pools. Significant reductions in DNA and RNA synthesis were observed in P388 cells from NaOCN pretreated mice. No effect with NaOCN was observed on total cellular RNA. NaOCN does not appear to affect the P388 cell ribosomal machinery, tRNA or protein synthesis elongation processes. The formation of the 48 S initiation complex was significantly inhibited by NaOCN. These results suggest that the decrease in protein synthesis observed with NaOCN in P388 cells is due to alterations in mRNA synthesis and/or the inhibition of the early stages of protein synthesis initiation.
3
Silva, Fabio Machado da. "Síntese de ácidos 3-alcóxi-3-cianopropanóicos, ácidos 2-ciano tetraidrofuran(2h-piran)-3-óicos e sua aplicação na obtenção dos respectivos ácidos succinâmicos e succínicos." Universidade Federal de Santa Maria, 2007. http://repositorio.ufsm.br/handle/1/10407.
Full textAbstract:
Conselho Nacional de Desenvolvimento Científico e TecnológicoThis work presents the synthesis of a series of 3-alkoxy-3-cyanopropanoic acids and 2-cyanotetrahydrofuran(2H-pyran)-3-carboxylic acids of general formula HO2CCH(R2)CR1(OR)CN, where R/R2= Et/H, Et/Me, -(CH2)2-, -(CH2)3-, iso-Pr/H, sec- Bu/H, iso-Pr/Me, sec-Bu/Me and R1= H, obtained through the reaction of β-alkoxyvinyl trichloromethyl ketones [Cl3CCOC(R2)=CR1(OR)] with sodium cyanide. The methodology used in the synthesis provided high selectivity to the reaction, being observed only the formation of the expected products, through a conjugated addition the cyanide to the β-carbon of the enones and substitution of the CCl3 group by the hydroxyl ion originated from the basic medium used in the reaction. The β-alkoxyvinyl trichloromethyl ketones where R/R2= Et/H, R1= OEt and R/R2= Et/Br, R1=H, when submitted the same reaction conditions, furnished the succinimide 3,3-diethoxypyrrolidine-2,5-dione and the maleimide 3-ethoxy-1H-pyrrole-2,5-dione, respectively. In a second reaction, the synthesized 3-alkoxy-3-cyanopropanoic acids and 2- cyanotetrahydrofuran(2H-pyran)-3-carboxylic acids were used to obtain succinamic acids and succinic acids of general formula HO2CCH(R2)CR1(OR)CONH2 and HO2CCH(R2)CR1(OR)CO2H, respectively. The succinamic acids were formed by the spontaneous conversion of the cyano group to amide (partial hydrolysis) and the succinic acids were obtained by the total hydrolysis of the cyano group to carboxylic acid, under reflux and acid medium.
Este trabalho apresenta a síntese de uma série de ácidos 3-alcóxi-3-cianopropanóicos e 2-cianotetraidrofuran(2H-piran)-3-óicos de fórmula geral HO2CCH(R2)CR1(OR)CN, onde R/R2= Et/H, Et/Me, -(CH2)2-, -(CH2)3-, iso-Pr/H, sec-Bu/H, iso-Pr/Me, sec-Bu/Me e R1= H, obtidos através da reação de β-alcoxivinil triclorometil cetonas [Cl3CCOC(R2)=CR1(OR)] com cianeto de sódio. A metodologia empregada na síntese proporcionou alta seletividade à reação, sendo observada somente a formação do produto esperado, via adição conjugada de cianeto no carbono-β das enonas e substituição do grupo CCl3 pelo íon hidróxido proveniente do meio básico utilizado na reação. As β-alcoxivinil triclorometil cetonas, onde R/R2=Et/H, R1= OEt e R/R2= Et/Br, R1= H, quando submetidas as mesmas condições de reação, produziram a succinimida 3,3-dietoxipirrolidino-2,5-diona e a maleimida 3-etóxi-1H-pirrol-2,5-diona, respectivamente. Em um segundo momento, os ácidos 3-alcóxi-3-cianopropanóicos e 2-cianotetraidrofuran(2H-piran)-3-óicos sintetizados foram empregados na obtenção de ácidos succinâmicos e de ácidos succínicos, representados estruturalmente por HO2CCH(R2)CR1(OR)CONH2 e HO2CCH(R2)CR1(OR)CO2H, respectivamente. Os ácidos succinâmicos formaram-se pela conversão espontânea do grupo ciano para amida (hidrólise parcial) e os ácidos succínicos foram obtidos por reação de hidrólise total do grupo ciano para ácido carboxílico, sob refluxo e meio ácido.
4
Ambard, Marie-Hélène. "Etude par simulation numerique d'un modele tridimensionnel de nacn." Paris 6, 1987. http://www.theses.fr/1987PA066237.
Full textAbstract:
Les phases sont caracterisees par desordre d'orientation des molecules, mouvements de reorientation d'un puits de potentiel a un autre et des librations. La dynamique rotationnelle des molecules a ete etudiee par l'intermediaire de fonctions de correlation rotationnelles et de spectres de phonons. Une etude qualitative de ces fonctions a permis d'expliquer les largeurs variees des spectres
5
Morgan, David R. "Maximising the effectiveness of aerial 1080 control of possums (Trichosurus vulpecula)." Lincoln University, 2004. http://hdl.handle.net/10182/20.
Full textAbstract:
Aerial control using 1080 (sodium monofluoroacetate) baits is widely used in New Zealand for the control of introduced brushtail possums (Trichosurus vulpecula), with the aim of protecting national conservation and agricultural values from these damaging pests. This thesis integrates research, completed over 25 years, that was motivated by growing recognition in the 1970s of the extent of possum impacts and the need to improve the effectiveness and efficiency of the control operation. Field research assessed the palatability of three types of cereal-based pellet baits and carrot baits in different regions, habitat types and seasons. Palatability was assessed by the consumption of the different bait types presented independently of each other on 15-30 plots, with rotation of bait types at plots on successive nights to provide equal exposure to each bait type. There was regional variation in possums' bait preferences, possibly reflecting genotypic differences, whereas seasonal variation was less evident. Carrot bait was preferred or equally preferred to cereal bait in 14 out of 20 field trials. The proportion of possums eating baits was then investigated by, firstly, developing a technique for tracing bait acceptance using rhodamine B, a UV-fluorescent dye. In four field trials, more than 95% of possums accepted three types of dye-marked bait, eliminating bait refusal as a major reason for low kills in winter control operations. In a fifth trial, conducted in summer, only 68% of possums accepted bait suggesting that seasonal availability of favoured foods may influence bait acceptance. Since possums must encounter baits before deciding whether to eat them, field studies were undertaken to assess the coverage achieved in normal aerial baiting operations. Large gaps, up to 400 m in width, were often found between baiting swaths; these could allow some possums to survive. A controlled field experiment, using acceptance of rhodamine-dyed bait as a measure of effectiveness, showed that bait distribution was least accurate where flight paths were not marked. Where gaps of 100 m between flight paths were deliberately created, bait acceptance was slower and less than where coverage was complete. Sowing baits at 3 kg/ha was as effective as at 10 kg/ha, indicating the potential for substantially reducing operational costs by using machinery capable of faultlessly distributing baits at low rates. Navigational guidance systems were evaluated and found to improve the accuracy of bait distribution. During 1993-1997, when a lower sowing rate of 5 kg/ha was adopted operationally by regional managers, control effectiveness was unchanged but annual savings of around $9 million accrued. Because of the lack of suitable sowing machinery, a bucket was developed to permit faultless distribution of baits at lower rates, demonstrating the possibility of yet further cost-savings. The possibility of seasonal food availability affecting bait acceptance was investigated in three different forest habitats. Dyed baits were aerially distributed on 100 ha at each site in each season over two years. In each trial, fat-based condition indices of possums were calculated and the abundance of possum-preferred plant foods described. Bait acceptance was consistently high (85-100%) in the 24 trials, and was not influenced by either condition or availability of preferred foods. It seems likely that seasonal variation in operational effectiveness is caused by either the availability of sharply seasonal, scarce foods that possums may feed on intensively for brief periods, or by warmer temperatures that render 1080 less effective. The influence of 1080 on acceptance of (rhodamine-dyed) baits was investigated in a field trial. Examination of possums for dye-marking showed that 25% of possums refused to eat either a lethal quantity of bait or any bait at all, compared with 98% of possums eating non-toxic bait. This indicated that 1080 is aversive to possums, which is a potential major reason for their surviving control operations. Pen trials were therefore conducted to further examine the problem and to seek solutions. Toxic carrot baits were rejected by 27.5% of possums, equally by smell and taste aversion, whereas toxic cereal pellets were rejected by 34%, mainly by taste aversion. Orange and cinnamon were shown to be among the most preferred of 42 flavours tested and, when applied to toxic baits, 1080 was effectively masked. Bait refusal was reduced to ≤7%, the same as that recorded for possums presented with flavoured non-toxic baits. For long-term control of possum populations, aerial 1080 baiting can be used sequentially with other poisoning methods. However, the compatibility of these methods is dependent on the likelihood of possums developing bait shyness if sublethally dosed. Studies were therefore conducted to characterise and compare the four main toxicants used (1080, cyanide, cholecalciferol and brodifacoum) for induction and mitigation of bait shyness. Shyness was induced in approximately 80% of possums sublethally dosed with cyanide, 60% with 1080, 20% with cholecalciferol, and 0% with brodifacoum. Cyanide and 1080 shyness were found to persist in many possums for at least 12 and 24 months, respectively. Use of alternative bait types, and of baits containing an alternative slow-acting toxin (brodifacoum) were shown to be effective ways of overcoming shyness. This, and other related research, is reviewed to provide operational specifications that maximise the likelihood that all targeted possums will (i) encounter bait, (ii) eat it, and (iii) die. The likely future use of aerial 1080 baiting is described and the technological, economic, environmental and social constraints on its sustainability are discussed. Finally, the uptake of the research by possum managers is considered, and areas identified in the thesis where information is incomplete are summarised as prioritised topics for further research.
6
Ben, Fadhel Besma. "Voies alternatives de traitement pour l'obtention de papiers résistants à l'état humide et de textiles cellulosiques infroissables." Thesis, Mulhouse, 2012. http://www.theses.fr/2012MULH6631.
Full textAbstract:
Cette thèse comporte un volet papetier et un volet textile. Dans le premier volet, de nouveaux produits capables d’améliorer la résistance à l’état humide (REH) du papier et qui soient si possible ‘écologiques’ ont été recherchés. Dans ce but, nous avons synthétisé avec de bons rendements des sels d’ammoniums quaternaires (SAQs) allylés dont beaucoup sont originaux. Ces sels ont été par la suite polymérisés à l‘aide d’un réacteur micro-onde. Les polymères obtenus sont cationiques, hydrosolubles et amphiphiles. Après fixation sur papier, nous avons mis en évidence qu’un traitement bicouche avec un copolymère amphiphile à base de bromure N,N-diallyl-pyrrolidinium (BDAP) et de carboxyméthylcellulose (CMC) apporte de façon inattendu un caractère hydrophobe marqué au papier traité alors que des copolymères réactifs synthétisés à base de N,N-diallyl-3-hydroxy-azétidinium (CDAHA) sont capables de conférer au papier une REH comparable à celle fournie par les résines polyamide-amine-épichlorhydrine (ou PAE) commerciales. Concernant le volet textile, l’objectif était de produire une recette optimale de traitement infroissable pour un tissu 100% coton à base d’acides polycarboxyliques, qui soit performante, non onéreuse et écologique. Pour cela, nous avons choisi l’acide citrique (AC) comme étant l’élément actif de la recette qui est à base de 5% d’AC et d’un mélange de catalyseurs : hypophosphite de sodium / cyanamide (1 éq ; 0,75 : 0,25). La température et le temps de réticulation ont été optimisés respectivement à 170°C et 90 s. L’infroissabilité ainsi conférée peut être estimée au mieux à assez bonne. En contrepartie, ce traitement infroissable engendre une dégradation de la résistance à la traction et du degré de blanc du support. Des supports de coton traités avec la recette optimale et éventuellement d’autres recettes ont été caractérisés par différentes méthodes analytiques. Les résultats trouvés montrent que la réaction d’estérification de la cellulose avec l’AC se produit principalement dans la paroi cellulaire et non pas en surface des fils de coton. En outre, le degré de polymérisation de la cellulose traité chute de 60%, ce qui est en accord avec les mesures dynamométriques déjà réaliséesThis work is divided into two parts: a papermaking part and a textile one. In the first part, new and if possible ‘green’ products, which can improve paper wet-strength, have been designed. For this purpose, unsaturated quaternary ammonium salts (SAQs), many of them unpublished so far, were synthesized. These salts were then polymerized using a microwave reactor. The resulting (co)polymers are cationic, water-soluble and amphiphilic. We demonstrated that papers, once treated by an amphiphilic N,N-diallyl-pyrrolidinium-based copolymer and carboxymethylcellulose (CMC) via a bi-layer treatment, were endowed with an obvious hydrophobic character. Moreover, other copolymers synthesized from N,N-diallyl-3-hydroxy-azetidinium (CDAHA) were able to impart to paper sheet a wet-strength comparable to that usually provided by polyamide-amine-epichlorohydrin (PAE) resins. The second part of the present work is dedicated to the development of an optimal anti-wrinkle recipe for cotton fabrics based on polycarboxylic acids. This recipe should be ideally efficient, cheap and eco-friendly. For that goal, citric acid (CA) was used as the active medium of the recipe that was based on 5% aq AC (w/w) solution and a catalyst mixture: sodium hypophosphite / cyanamide (1 eq, 0.75, 0.25). Temperature and heating duration was respectively optimized at 170°C and 90 s. Resulting crease-resistant properties can be estimated at best to good. However, such an anti-wrinkle treatment causes a degradation of both tensile strength and whiteness index. Cottons treated with the optimum recipe and other recipes were characterized by different analytical methods. Data showed that esterification reaction of cellulose with AC occurs mainly in the cell wall and does not affect the yarn surface. In addition, polymerization degree of treated cellulose was reduced of 60% in accordance with already measured mechanical properties
7
Engelbrecht, Deborah. "The life cycle assessment of cyanide containers in Ghana." Diss., 2010. http://hdl.handle.net/10500/3603.
Full textAbstract:
Ghana, a West Africa country, is deeply burdened by poverty, and relies on the production of
gold for economic sustainability. The gold mining companies in the country have
international origins and receive most of their requirements from international sources. The
extraction of gold from the crushed ore requires sodium cyanide as a lixiviant, which is
imported into Ghana from other countries in wooden intermediate bulk containers (IBC) for
further distribution to the mines. A life cycle assessment was completed to determine the
burden that this packaging, which includes the wooden container and polyethylene and
polypropylene liners, places on the environment in Ghana when disposed of. It was found
that the life cycle of the incinerated IBC impacted on the Ghanaian environment the most, due
to the incineration and the transportation of the IBC. The International Organization for
Standardization 14040 management standard was used as a methodological framework for the
assessment.Environmental Science
M.Sc. (Environmental Science)
8
Lu, Kuo Shiang, and 呂國祥. "The Effect of Sodium Cyanide on Multiunit Activity in the Rat Suprachiasmatic Nucleus." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/61624472480265215061.
Full textAbstract:
碩士長庚大學
生物醫學研究所
99
The hypothalamic suprachiasmatic nucleus (SCN) is the central clock to coordinate peripheral oscillators in controlling circadian rhythms of metabolism, physiology, and behaviors in mammals. Accumulating evidence indicates that metabolic cues can feedback to alter circadian functioning in the SCN. Our lab recently used the patch-clamped recording technique to demonstrate that metabolic regulation of KATP conductance and Na/K pump activity provides mechanisms for linking metabolic state to excitability in SCN neurons. The purpose of my thesis is to determine if metabolic inhibition can also regulate circadian firing rhythm of SCN neurons. I used the Panasonic MED multiunit recording system to record circadian firing activity of SCN neurons and investigate the effect of mitochondrial inhibition on the rhythm. Using this system I was able to successfully record two consecutive cycles of firing rhythm from a limited number of SCN neurons. To determine the effect of cyanide on firing rhythms, I applied 1 mM NaCN to SCN slices for 10 minutes at two time points of CT7-8 and CT14. The results indicate that the peak firing activity of dorsal SCN (dSCN) neurons appeared to be delayed by several hours in the next day when NaCN was applied at CT14. In contrast, the peak firing activity of ventral SCN neurons was not altered by metabolic inhibition. My result suggests a direct effect of metabolic inhibition on circadian firing rhythm of dSCN neurons. It remains to be determined the functional implication of such an observation.
9
Lai, Shyh-Kuen, and 賴世坤. "Studies on the effect of sodium cyanide on synaptic transmission in the CA1 region of rat hippocampal slices." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/89210640892049787067.
Full textAbstract:
碩士國立臺灣大學
藥理學研究所
83
We attempted in this study to explore the action of low concen-tration of cyanide on the synaptic transmission in the CA1 re-gion of rat hippocampal slices. Bath application of cyanide (30μM) could result in a transient and reversible depression on population spike (PS) and excitatory postsynaptic potential (EPSP). Sequential addition of cyanide (10-100μM) resulted in dose-dependent reduction of evoked PS and EPSP.Neither of the other oxidative phosphorylation uncouplers, sodium azide and 2,4-dinitrophenol, nor Na+ pump inhibitor, ouabain could mimick micromolar cyanide to induce a transient and reversible depression of CA1 evoked PS. Cyanide-induced transient depression of CA1 evoked PS was attenuated by L-type Ca2+channel blockers nifedipine, verapamil and NMDA receptor antagonist 2-amino-5-phosphonopentanoic acid (APV),respectively, indicating a possibility that the action of cyanide was partly mediated by a postsynaptic NMDA receptor or a release of transmitter which could be in a Ca2+-dependent release manner. In the presence of adenosine A1 receptor antagonist 1,3-dipropyl 8-cyclopentylxanthine (DPCPX), the cyanide-induced inhibition was markedly reduced. Adenosine and adenosine uptake inhibitor dipyridamole could potentiate the cyanide-induced inhibition. The cyanide-induced inhibition could be antagonized by diazoxide and potentiated by glibenclamide. The cyanide-induced depression of CA1 evoked PS was accompanied by an increase in the pair-pulse facilitation (PPF) ratio. Thus, the presynaptic transmitter release is decreased during cyanide application. When cyanide was applied immediately after high frequency stimulation, not only post-tetanic potentiation was inhibited but also long-term potentiation was blocked. However, when the adenosine A1 receptor antagonist DPCPX was present, the inhibitory effect of cyanide on evoked responses was markedly reduced.
Books on the topic "Sodium cyanide"
1
United States. Bureau of Mines. Leaching gold-silver ores within sodium cyanide and thiourea under comparable conditions. S.l: s.n, 1988.
Find full text
2
A, Eisele J. Leaching gold-silver ores with sodium cyanide and thiourea under comparable conditions. Pittsburgh, Pa: U.S. Dept. of the Interior, Bureau of Mines, 1988.
Find full text
3
Cepuch, C. Cyanide blood concentration following sodium nitroprusside administration: effect of sodium thiosulfate. 1993.
Find full text
4
Attempt to Produce Chronic Cyanide Poisoning in Rabbits by Feeding Sodium Cyanide. Creative Media Partners, LLC, 2023.
Find full text
5
Beyer, Theodore Ernest. Attempt to Produce Chronic Cyanide Poisoning in Rabbits by Feeding Sodium Cyanide. Creative Media Partners, LLC, 2018.
Find full text
6
M-44 device for local predator control. Washington, D.C.]: Wildlife Services, U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service, 2010.
Find full text
7
Borron, Stephen W. Management of cyanide poisoning. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199600830.003.0326.
Full textAbstract:
Acute cyanide poisoning poses vital diagnostic and therapeutic challenges for emergency physicians and intensivists. While it presents certain unique clinical features, cyanide poisoning may be confused with other entities. Definitive, contemporaneous diagnosis at the bedside is impossible in most hospitals. A thorough anamnesis, rapid physical assessment, and evaluation of key laboratory indicators often point the clinician in the right direction. Smoke inhalation from structure fires represents the most frequent source of cyanide poisoning. Symptom onset may be gradual in the case of skin exposures to cyanide or ingestion of compounds that are metabolized to cyanide. However, acute cyanide poisoning presents as a syndrome of rapidly evolving and deteriorating vital signs, profound neurological and cardiovascular dysfunction, and if therapeutic interventions are not timely and adapted, death. There is little time for diagnostic testing: one must act! The sine qua non of treatment is excellent supportive care, with aggressive airway management, support of blood pressure, and correction of acidosis. Treatment of acidosis is particularly relevant in the case of cyanide. Rapid administration of specific cyanide antidotes may be lifesaving. While geographic variations exist in antidote availability, most commercially available antidotes have been demonstrated to be effective. Hydroxocobalamin and sodium thiosulphate, both safe in the setting of smoke inhalation, offer the highest therapeutic index, a critical consideration when the diagnosis is uncertain.
8
Study of the Double Cyanides of Zinc with Potassium and with Sodium. Creative Media Partners, LLC, 2023.
Find full textBook chapters on the topic "Sodium cyanide"
1
Gooch, Jan W. "Sodium Cyanide." In Encyclopedic Dictionary of Polymers, 674. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_10827.
Full text
2
Abraham, Prasad, Alissa Lockwood, John Patka, Marina Rabinovich, Jennifer Sutherland, and Katleen Chester. "Sodium nitroprusside in intensive care medicine and issues of cyanide poisoning, cyanide poisoning prophylaxis, and thiocyanate poisoning." In Toxicology of Cyanides and Cyanogens, 129–50. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781118628966.ch9.
Full text
3
Eisler, Ronald, Donald R. Clark, Stanley N. Wiemeyer, and Charles J. Henny. "Sodium Cyanide Hazards to Fish and Other Wildlife from Gold Mining Operations." In Environmental Impacts of Mining Activities, 55–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-59891-3_5.
Full text
4
Gorrod, John W., Catherine M. C. Whittlesea, and Siu Ping Lam. "Trapping of Reactive Intermediates by Incorporation of 14C-Sodium Cyanide during Microsomal Oxidation." In Advances in Experimental Medicine and Biology, 657–64. Boston, MA: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4684-5877-0_82.
Full text
5
Geller, Richard J. "Amyl nitrite, sodium nitrite, and sodium thiosulfate." In Toxicology of Cyanides and Cyanogens, 296–303. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781118628966.ch24.
Full text
6
"Sodium cyanide." In Encyclopedic Dictionary of Polymers, 898. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_10631.
Full text
7
North, M. "Using Sodium or Potassium Cyanide." In Compounds of Groups 15 (As, Sb, Bi) and Silicon Compounds, 1. Georg Thieme Verlag KG, 2002. http://dx.doi.org/10.1055/sos-sd-004-00545.
Full text
8
"Product Subclass 3: Sodium Halides and Sodium Cyanide." In Category 1, Organometallics, edited by Majewski and Snieckus. Stuttgart: Georg Thieme Verlag, 2006. http://dx.doi.org/10.1055/sos-sd-008-00645.
Full text
9
HALL, ALAN H. "Cyanide and Related Compounds—Sodium Azide." In Haddad and Winchester's Clinical Management of Poisoning and Drug Overdose, 1309–16. Elsevier, 2007. http://dx.doi.org/10.1016/b978-0-7216-0693-4.50093-1.
Full text
10
Schmidt, A. "Using Chlorine Dioxide and Sodium Cyanide." In Three Carbon-Heteroatom Bonds: Nitriles, Isocyanides, and Derivatives, 1. Georg Thieme Verlag KG, 2004. http://dx.doi.org/10.1055/sos-sd-019-00114.
Full textConference papers on the topic "Sodium cyanide"
1
Zhou, Li, Hai Lin, Kaibin Fu, Lulu Yu, Xiu Wang, and Yuansi Tan. "Pretreatment of Refractory and Cyanide-Containing Pesticide Wastewater Using Sodium Hypochlorite." In 2010 International Conference on E-Product E-Service and E-Entertainment (ICEEE 2010). IEEE, 2010. http://dx.doi.org/10.1109/iceee.2010.5660947.
Full text
2
Chan, Adriano, Lan Tang, William Blackledge, Herbert T. Nagasawa, Steven E. Patterson, Gerry R. Boss, and Timothy D. Bigby. "Cobinamide And Sulfanegen Sodium Act Synergistically In Rescuing Mice From Cyanide Poisoning." In American Thoracic Society 2010 International Conference, May 14-19, 2010 • New Orleans. American Thoracic Society, 2010. http://dx.doi.org/10.1164/ajrccm-conference.2010.181.1_meetingabstracts.a4652.
Full text
3
Karim, A., M. I. Khan, M. S. Panhwar, F. Nadeem, D. Carroll, and A. Kalra. "Cyanide Toxicity at "Safe" Dose of Sodium Nitroprusside Within 24 Hours of Treatment." In American Thoracic Society 2019 International Conference, May 17-22, 2019 - Dallas, TX. American Thoracic Society, 2019. http://dx.doi.org/10.1164/ajrccm-conference.2019.199.1_meetingabstracts.a4804.
Full text
4
Lin, Huidan, and Gengjun Gao. "Risk Analysis and Safety Management Research for ISO-Tank Transportation of Sodium Cyanide." In Inernational Conference of Logistics Engineering and Management 2012. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412602.0098.
Full text
5
Stom, O. F. "INFLUENCE OF AZID OF SODIUM, CYANIDE OF POTASSIUM AND FLUORIDE OF SODIUM ON TEST REACTION ON SUPPRESSION OF FOAMING AT SACCHAROMYCES CEREVISIAE." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/52/s20.068.
Full text
6
Mahmud, Marike, Fitryane Lihawa, Aryati Alitu, Rawiyah Husnan, and Barry Labdul. "An Analysis of Water Quality of Lake Perintis and Lake Limboto as Irrigation Water Sources in Gorontalo Province." In Unima International Conference on Science and Technology 2022. Switzerland: Trans Tech Publications Ltd, 2023. http://dx.doi.org/10.4028/p-l3rp7i.
Full textAbstract:
This study aims to analyze the water quality of Lake Perintis and Lake Limboto as irrigation water sources in Gorontalo Province. This study was carried out by considering the importance of water from these two lakes for irrigating the rice fields. 2 lakes became the locations for sampling in this study, namely Lake Limboto and Lake Perintis. Because this study was an initial survey, the researchers only applied one-site and one-time sampling for each lake. The observed parameters were temperature, TDS, COD, turbidity, phosphate, pH, nitrate, iron, manganese, cyanide, arsenic, fluoride, chlorine, manganese, magnesium, calcium, sodium, potassium, total coliform, and E. coli. The analysis was carried out at the Water Quality Laboratory, Health Office of Gorontalo and Integrated Research & Testing Laboratory of Gadjah Mada University. The sampling for total coliform was carried out aseptically, while measurements in the laboratory applied the MPN method. The way of taking chemical and physical samples followed SNI 8995-2021. Furthermore, the collected data were analyzed following Government Regulation No. 22/2021 Appendix VI regarding Lake Water Quality Standards. In analyzing water for irrigation purposes, the researchers applied the Sodium Adsorption Ratio (SAR) classification. Results showed that the water quality of Lake Perintis and Lake Limboto did not meet the requirements stipulated in Government Regulation No. 22/2021 because the chlorine, COD, and phosphate parameters were above the required quality standard. In addition, we also found that the pollution level in Lake Limboto was higher than that of Lake Perintis. Moreover, the results of the SAR analysis indicated a score of 7.975 for Lake Perintis (classified in the low sodium criteria) and a score of 11.23 for Lake Limboto (classified in the medium sodium criteria).
7
Chiselita, Oleg, Natalia Chiselitsa, Elena Tofan, Alina Beshliu, Nadejda Efremova, Marina Danilis, and Ana Rotaru. "Antocyanic extracts from yeast winewaste." In 5th International Scientific Conference on Microbial Biotechnology. Institute of Microbiology and Biotechnology, Republic of Moldova, 2022. http://dx.doi.org/10.52757/imb22.15.
Full textAbstract:
Phenolic compounds, especially phenolic acids, tannins and anthocyanins are among the important biologically active components of wines. Of all the phenolic compounds, anthocyanins are of a particular interest because they have many beneficial effects on human and animal health. In vitro and in vivo studies have revealed the biological potential of these compounds and demonstrated their ability to reduce oxidative stress, to act as antimicrobial substances and to counteract the appearance and progression of many nontransmissible diseases, such as neurodegenerative, cardiovascular, metabolic ones and cancer. In combination with vitamin A and other carotenoids they protect visual function. Anthocyanins and their derivatives have no toxic effect on living organisms, even after ingestion in very high doses. Since the biologically active substances, including anthocyanins, found out in the fermentation medium, are largely absorbed on the surface of the yeast cells, yeast biomass remaining from wine production, can serve as an important source of these substances. The purposes of this research were to obtain anthocyanin extracts from the yeast biomass remaining from the production of the autochthonous wines, to characterize them biochemically, and to assess their antioxidant potential. The research was focused on the sediment yeast biomass from the production of white dry wine Rkatsiteli, red dry wines Merlot and Cabernet, offered by the «Cricova» winery. The extracts were obtained by different methods of destruction of the yeast cell wall, which included the use of the acetic acid and the sodium phosphate buffer solutions, homogenization, different temperatures and biomass-solution ratios. The extracts were characterized by their dry weight, by the content of the anthocyanins, proteins, and carbohydrates, as well as by the activity of the antioxidant enzymes catalase and superoxide dismutase. Depending on the yeast biomass type and the cell wall destruction method the obtained extracts had the dry weight of 2.2 - 13.3 mg/ml, and contained 3.9±0.3 - 20.7±0.4 mg/g of cyanidin anthocyanins, 3.2±0.2 - 9.7±0.4% (d.w.) of proteins, 2.2±0.02 - 31.4±0.3% (d.w.) of carbohydrates, and possessed the antioxidant type catalase activity of 315±2.6 - 524±1.5 mmol/min/mg protein and the superoxide dismutase of 173±5.2 - 457±0.6 U/mg protein. The valuable biochemical composition and high activity of the antioxidant enzymes such as catalase type and superoxide dismutase of the extracts revealed the perspectivity of using the yeast biomass from wine production as a source of anthocyanin preparations for various fields. The results of the research permitted to elaborate a procedure of obtaining the anthocyanin preparations from yeast biomass after red wine fermentation, which is currently being patented.