Wyniki wyszukiwania - AGRO

1

The coagulation system in horses with colic

100%

Zbanyszek M., Procajlo A., Stopyra A., Sobiech P., Rajski K.

Polish Journal of Veterinary Sciences

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2004

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tom 07

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nr 1

Colic in horses very often induces changes in the coagulation system causing the development of disseminated intravascular clotting. It is promoted by blood concentration and an increase in exposition of coagulation activators with a simultaneous decrease in coagulation inhibitors activity, mainly antithrombin III. Progressing blood platelets aggregation supports production of microthromboses and plugging capillary vessels. The progression of this processes causes complications in basic disease and becomes the reason for therapeutic failure. Determination of coagulation system indexes such as the number of platelets, prothrombin time, activated partial thromboplastin time, thrombin time, concentration of fibrinogen and fibrinogen degradation products, and D-dimmer and antithrombin III contents enables diagnosis and facilitates appropriate therapy of colic in horses.

2

Organic polymers in the process of silica suspension flocculation

100%

Smoczynski L., Wierzbicka E.

Natural Sciences

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2001

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tom 09

3

Coagulation of wastewater containing reactive dyes with the use of polyaluminium chloride [PAC]

100%

Klimiuk E., Filipkowska U., Libecki B.

Polish Journal of Environmental Studies

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1999

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tom 08

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nr 2

4

Hydrogen sulfide emission from sewage

88%

Smoczynski L., Polak A., Paprocka J., Smoczynska A.

Polish Journal of Natural Sciences

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2004

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tom 16

231-239

5

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Applying the coagulation and reverse osmosis for water recovery from evaporative water

88%

Michel M. M., Reczek L., Siwiec T., Rudnicki P.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2014

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tom 46

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nr 4

Evaporative water from the concentration of yeast slurry is a potential raw material for water recovery. It is characterized by low pH (4.6–6.3), increased turbidity (3.65–13.7 NTU), and high content of total organic carbon (356–754 mg/L). Its treatment in the volume coagulation process using NaOH and coagulant PIX 111, was studied. Water turbidity was lowered to a value below 1 NTU, but coagulation did not allow for the removal of organic compounds. Coagulation was effective at temperatures of 20 and 40°C. Pre- -treatment of the feed water for RO included alkalization, coagulation, sedimentation, and 5 μm fine filtration (variant I), as well as single 5 μm fine filtration (variant II as a blank). In variant I the feed with improved properties was achieved. Membrane filtration allowed for effective desalination of evaporative water, 98 and 73% conductivity retention was obtained, depending on the method of the feed pre-treatment. The organic compounds were removed less effi ciently, at 94 and 84%, respectively.

6

Pericardium: structure and function in health and disease

75%

Jaworska-Wilczynska M., Trzaskoma P., Szczepankiewicz A. A., Hryniewiecki T.

Folia Histochemica et Cytobiologica

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2016

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tom 54

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nr 3

7

Chemically enhanced primary treatment of textile industrial effluents

75%

Mahmoud E. K.

Polish Journal of Environmental Studies

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2009

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tom 18

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nr 4

651-655

Textile industries consume substantial volumes of water and chemicals for wet processing of textiles. Effluent discharge from textile industries to neighbouring water bodies and wastewater treatment systems is currently causing significant health concerns. Chemically enhanced primary treatment (CEPT) involves the use of chemical coagulants to enhance the coagulation or flocculation of wastewater particles. The chemicals of aluminum sulphate (alum), ferric chloride (FeCl₃) and cationic polymer were studied by jar test to select the most suitable coagulant for effective treatment of textile industrial effluents. The results showed that the optimum dosage for the removal of 75% of colour, 64% turbidity and 69% of chemical oxygen demand (COD) was 300 ppm of alum after pH adjustment at pH = 7.2. An experiment further revealed that the addition of 300 mg l⁻¹ of alum and 1 mg l⁻¹ of polymer could provide a reduction of colour, turbidity, COD and phosphorous higher than 95%, 75%, 76% and 90%, respectively. The experimental results confirmed that CEPT can be adopted as a decolorization of textile industrial effluents. Moreover, it can improve sludge setting and dehydration properties, and decrease the treatment cost.

8

Empirical formulae for efficiency of DOM removal by adsorption determined on the basis of bench-scale results

75%

Szlachta M., Adamski W.

Polish Journal of Environmental Studies

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2009

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tom 18

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nr 3

481-486

9

Association between standard laboratory and functional tests of coagulation in dilutional coagulopathy: an in vitro study

75%

Krzych L. J., Czempik P. F.

Journal of Physiology and Pharmacology

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2017

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tom 68

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nr 4

10

Changes in iron(II) and iron(III) content in a solution of humic acids during coagulation by means of monomeric iron(III) salts

75%

Libecki B., Dziejowski J.

Polish Journal of Environmental Studies

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2010

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tom 19

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nr 5

This study discusses the results of laboratory analyses investigating the chemical coagulation of a model of humic acid solution with the use of monomeric iron(III) salts – chloride and sulfate – in a standard coagulation test environment. The objective of the study was to determine changes in iron compound concentrations in the tested solution as a result of coagulation. The following parameters were analyzed in solution samples: changes in COD, colour, turbidity, suspended solids, pH, and streaming potential in relation to the applied coagulant dose. The content of total iron (Fetotal) and iron(II) was determined in solution samples after coagulation. The lowest Fetotal concentrations were observed following the use of optimal coagulant doses, and higher doses led to a repeated increase in total iron levels. In purified solution samples, iron(III) was partially reduced to iron(II) with an 8-42% share of Fetotal, depending on salt type and the applied dose.

11

Blood coagulation characteristics in horses. The influence of breed

75%

Dabrowska J., Wisniewski E., Krumrych W., Danek J.

Bulletin of the Veterinary Institute in Puławy

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1997

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tom 41

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nr 2

This work aimed to assay the physiological values of basie blood coagulation indices and to determine the influence of breed on their range. Studies involved 105 horses of 6 breeds: Arabians, Thoroughbreds, Great Polish, Pony, Polish Primitive Horses and other breeds. It was found that under physiological conditions a mean coagulation time, kaolin-cephalin time, prothrombin time and thrombin time were 12.0 min, 124.0 s, 14.1 s, and 26.9 s, respectively. The concentration of fibrinogen was 3.48 g/ml and platelet count was 177 x 10⁹/1. Statistical analysis revealed that the breeds examined affected all the indices measured. The most efficienf mechanisms controlling haemostatis showed Thoroughbreds and Arabians contary to ponies Polish Primitive Horses.

12

Functions of human complement inhibitor C4b-binding protein in relation to its structure

75%

Blom A. M., Villoutreix B. O., Dahlback B.

Archivum Immunologiae et Therapiae Experimentalis

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2004

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tom 52

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nr 2

13

Effects of pH and coagulant dosage on effectiveness of coagulation of reactive dyes from model wastewater by polyaluminium chloride [PAC]

75%

Klimiuk E., Filipkowska U., Korzeniowska A.

Polish Journal of Environmental Studies

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1999

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tom 08

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nr 2

14

Removal of natural estrogens and synthetic compounds considered to be endocrine disrupting substances [EDs] by coagulation and nanofiltration

75%

Bodzek M., Dudziak M.

Polish Journal of Environmental Studies

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2006

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tom 15

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nr 1

Our paper presents the evaluation of retention coefficient of such natural estrogens as estrone (E1), estradiol (E2) and estriol (E3) as well as synthetic compounds considered to be endocrine disrupting substances (EDs) – ethynylestradiol (EE2), mestranol (MeEE2) and diethylstilbestrol (DES) in water treatment processes, i.e. coagulation and nanofiltration. Estrogens were retained in effect of the adsorption on the particles of humic acids and on floccules of Al(OH)₃ and Fe(OH)₃. The efficiency of coagulation process was not good enough to remove these compounds completely from water. As a second stage of water treatment, nanofiltration was proposed. In this process, estrogens were adsorbed on membranes in their pores (Jv/Jw<1), and their retention was dependent on hydrophobility of micropollutants (logKow). The best treatment results were obtained for polyamide membrane (NF-DS5DK) within the range 93.5-99.9%.

15

Determination of the effectiveness of an inorganic coagulant

63%

Smoczynski L., Libecki B., Dziejowski J., Smoczynska A., Zaborowska A.

Polish Journal of Natural Sciences

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2005

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tom 18

133-142

16

Immune modulation in xenotransplantation

63%

Boksa M., Zeyland J., Slomski R., Lipinski D.

Archivum Immunologiae et Therapiae Experimentalis

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2015

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tom 63

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nr 3

17

Optimization of humic acids coagulation with aluminum and iron [III] salts

63%

Libecki B., Dziejowski J.

Polish Journal of Environmental Studies

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2008

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tom 17

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nr 3

397-403

Humic substances contained in ground and surface waters increase the degree of their pollution, give it a specific colour and contribute to the formation of toxic disinfection by-products in the process of water treatment. Coagulation is an effective method of removing organic compounds, including humic acids (HA), from water and wastewater. The proper selection of coagulants and optimization of such parameters as coagulant dose and the pH of the solution enable improvement of coagulation efficiency. The objective of the present study was to determine the efficiency of humic acids removal by coagulation, depending on the dose of Al and Fe(III) salts and pH of the analyzed solutions. A model alkaline solution and 0.2 M solutions of Al₂ (SO₄)₃ and Fe₂ (SO₄)₃ were used. The experiment was performed with and without pH adjustment, by a standard jar test procedure. COD-Cr [mg O₂ ·dm⁻³], colour – PtCo [mg·dm⁻³], turbidity – FTU [mg·dm⁻³], suspended solids – SS [mg·dm⁻³], pH and streaming potential – SP [mV] were determined during coagulation tests. In the solutions coagulated without pH adjustment and with the optimum doses of Al₂ (SO₄)₃ and Fe₂ (SO₄)₃ ,COD was at a level of 0.1 to 3% of the initial value and colour was removed almost completely. Iron(III) sulfate was found to be slightly more effective as a coagulant, in respect to COD removal. The results of electrokinetic measurements showed that the charge of molecules of humic colloids depends on the type and concentration of coagulating salt, as well as on the pH of the solution. The analysis of coagulation with pH adjustment revealed that there exists the optimum value of pH for each of the salt doses applied in the experiment. Coagulation with the use of Al₂ (SO₄)₃ and Fe₂ (SO₄)₃ proceeded at pH < 5.8 and pH < 4.2, respectively. A decrease in the pH of an HA solution allowed us to considerably (even eight-fold) reduce the dose of coagulants, maintaining high (above 94%) efficiency of humic acid removal by coagulation.

18

Effective use of ferric sulfate in treatment of different food industry wastewater

63%

Konieczny P., Ekner E., Uchman W., Kufel B.

Acta Scientiarum Polonorum. Technologia Alimentaria

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2005

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tom 04

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nr 1

123-132

Plants processing food of animal origin like dairy, meat or fish products need usually large quantities of clean water in production. More than 90% of clean water Is converted into wastewater demonstrating very high potential risk of environmental pollution. The present study was undertaken to compare, under the same analytical conditions, the efficiency of ferric sulfate used as coagulant (dose: 450 g/m3) in chemical treatment of raw technological wastewater collected from three various food industry plants (dairy processing, meat processing and fish processing). Results of visual and physicochemical evaluation of chemically treated wastewater indicated significant improvement of their selected characteristics, however different response to the coagulant treatment was observed within the tested samples. Removal efficiencies for individual parameters varied in the wide range between 20.9 and 97.2%. Since bacterial bioluminescence inhibition used as biotoxicity indicator of effluents collected after treatment with ferric sulfate was less than 20%, they should be considered as non-toxic samples.

19

Charakterystyka odcieku po koagulacji bialka pozyskiwanego w toku kampanii krochmalniczej

63%

Lubiewski Z., Smigielska H., Lewandowicz G., Balcerek W.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2006

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tom 511

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nr 2

617-626

In potato industry there are generated huge amounts of wastewater which due to high concentration of organic and biodegradable components as well as periodic production are especially difficult to utilization. Heat-coagulation of potato protein is applied to recovering valuable organic substances from these wastes. However, the effectiveness of this process achieves only up to 50%. The samples of supernatant liquid from heat-coagulation of potato protein were taken from Potato Processing Company WPPZ S.A. Luboń during potato processing period of 2005 year. Experimental material samples were examined for pH and the contents of dry matter, ash, protein and selected metal ions. Molecular size distributions of protein fractions were determined as well. The supernatants resulted from heat-coagulation of potato protein revealed rather constant physicochemical characteristics during the period of potato processing period. The contents of dry matter ranged within 3.2-4.3%, protein within 1.3-1.4%, ash within 1.1-1.3%; pH varied from 4.5 to 5.3. Very high level of heavy metals excludes the use of supernatant as a raw material for food production. Relatively low molecular mass of the protein fraction could reduce the effectiveness of classical membrane separation process. Application of modern technologies such as the micellar enhanced ultrafiltration seems to be most promising.

20

Natural coagulant for the treatment of food industry wastewater

63%

Anteneh W., Sahu O. P.

International Letters of Natural Sciences

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2014

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tom 04

Wastewater treatment is becoming ever more critical due to diminishing water resources, increasing wastewater disposal costs, and stricter discharge regulations that have lowered permissible contaminant levels in waste streams. The ultimate goal of wastewater management is the protection of the environment in a manner commensurate with public health and socio-economic concerns. The aim of our study is to use natural occurring polymeric coagulant to reduce the chemical oxygen demand and color from the industrial waste water. It was found that 83 % of Chemical oxygen demand and 90 % of color reduction was observed with chitosan.

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