baber/WOPTO huggingface dataset:
Patent CZ-80394-A3 (CZ)
Title: Gas turbo-set
Inventor: ALTHAUS ROLF DR
IPC: F02C6/02
Filed: 1994-04-06
Abstract: In a gas turbine assembly which essentially comprises a compressor (2), a first combustion chamber (3), a first turbine (4), a second combustion chamber (5) and a second turbine (6), the first combustion chamber (3) is designed as annular combustion chamber. The said annular combustion chamber (3) is operated with a number of premixing burners (11), which are distributed on the circumference. The first turbine (4) is designed so that its exhaust gases have a temperature level which is higher than the spontaneous combustion temperature of the fuel (13) used in the second combustion chamber (5). The said second combustion chamber (5) comprises a burnerless, annular combustion space in which a number of vortex-generating elements (14) are incorporated. The turbo-machines, that is compressor (2), first turbine (4) and second turbine (6), are arranged on a rotor shaft (1), the said rotor shaft (1) being supported on two bearings (9, 15). <IMAGE>
Patent CZ-82399-A3 (CZ)
Title: Modified amino acids , process of their preparation and pharmaceutical composition containing thereof
Inventor: RUDOLF KLAUS
IPC: A61K31/519
Filed: 1997-09-08
Abstract: Modified aminoacids of formula RC(=O)ZC(R11)((C=O)m(CH2)nR2)C(=X)ANR3R4 (I), their tautomers, diastereomers, enantiomers, mixtures and salts are new. R = 1-7C n-alkyl (optionally ~w-substituted), 1-6C n-alkylamino (optionally N-substituted) etc.; X = O or H; Z = CH2 or NR1; R1 = H, alkyl or phenylalkyl; R11 = H, 1-3C alkyl, 2-4C alkoxycarbonyl or benzyl; n = 1 or 2, or may be 0 if m = 1; m = 0 or 1; R2 = Ph, 1- or 2- naphthyl, 1,2,3,4-tetrahydro-1-naphthyl, 1H-indol-3-yl, 1-(methyl, formyl or t-butoxycarbonyl)-1H-indol-3-yl, 4-imidazolyl etc. (all optionally C-substituted); A = a direct bond or NR8CHR9CO; R8+R9 = (CH2)3; or R8 = H, alkyl or phenylalkyl; R9 = H or 1-5C alkyl, optionally ~w substituted if unbranched; R3 = H, 1-7C alkyl (optionally ~w-substituted) or phenyl or pyridinyl (optionally C-substituted); R4 = H or 1-3C alkyl (optionally substituted by Ph or pyridinyl).
Patent SK-36498-A3 (SK)
Inventor: MALIK MIROSLAV
IPC: G06K19/04
Filed: 1998-03-18
Abstract: Obsahuje
symetricky
alebo
asymetricky
umiestnené
za
­
pustené
vybranie
(1),
ktoré
má
na
dvoch
susediacich
stra
­
nách
umiestnené
zapustené
pružiace
usporiadania
(2),
kto
­
rých
pružiace
dotykové
plôšky
(3)
vystupujú
dovnútra
za
­
pusteného
vybrania
(1).
Zapustené
pružiace
usporiadania
(2)
môžu
byť
tvorené
napríklad
sústavou
zapustených
kru
­
hových
otvorov
(4),
ktorých
dotyčnica
(T)
rovnobežná
s
hranou
(H)
zapusteného
vybrania
(1)
je
na
úrovni
alebo
v
blízkosti
hrany
(H)
zapusteného
vybrania
(I).
Tým
sa
medzi
pružiacimi
dotykovými
plôškami
(3)
a
zapustenými
kruhovými
otvormi
(4)
vytvárajú
pružiace
môstiky
(5)
v
tvare
časti
prstenca
Patent SK-43998-A3 (SK)
Title: Imidazole derivatives having affinity for alpha2 receptors activity, method for the preparation thereof and pharmaceutical composition containing same
Inventor: KARJALAINEN ARTO
IPC: C07D233/56
Filed: 1996-10-02
Abstract: Imidazole derivatives of formula (I)wherein n is 0 or 1, R1 is hydrogen or C1-C4-alkyl, R2 is hydrogen or R2 and R3 together form a double bond, R3 is hydrogen or C1-C4-alkyl or R2 and R3 together form a double bond, R4 is hydrogen, C1-C4-alkyl, hydroxy or C1-C4-alkoxy, R5 is hydrogen or C1-C4-alkyl or R4 and R5 together with the carbon atom to which they are attached form a carbonyl group, R6, R7 and R8 are each the same or different and are independently hydrogen, C1-C4-alkyl or C2-C4-alkenyl, C3-C7-cycloalkyl, hydroxy, C1-C4-alkoxy, C1-C4-hydroxyalkyl, thiol, C1-4-alkylthio, C1-4-alkylthiol, halogen, trifluoromethyl, nitro or optionally substituted amino, X is -CHR9-(CHR10)m-, m is 0 or 1, and R9 and R10 are each the same or different and are independently hydrogen or C1-C4-alkyl; or a pharmaceutically acceptable ester or salt thereof, their preparation, use and pharmaceutical compositions comprising them are described. The compounds have affinity for alpha2 receptors and are useful e.g. in the treatment of hypertension, glaucoma, chronic or acute pain, migraine, diarrhea, common cold, ischemia, addiction to chemical substances, anxiety, especially preoperative anxiety and different neurological, musculoskeletal, psychiatric and cognition disorders or as adjuncts to anesthesia.
Patent SK-49099-A3 (SK)
Title: Method for the production of polyester yarns
Inventor: GEIER RUDOLF
IPC: D01D5/16
Filed: 1999-04-13
Abstract: The production process for melt-spun polyester filaments (8) has a preliminary drawing action through a counter flow at a temp. of 100-199 degrees C and preferably 120-170 degrees C to develop a crystallinity of ≥ 24%.
Patent SK-63496-A3 (SK)
Title: Treatment of climacteric disorders with nitric oxide synthase substrates and/or donors
Inventor: YALLAMPALLI CHANDRA
IPC: A61K31/341
Filed: 1994-11-17
Abstract: The symptoms of the climacterium are ameliorated by the administration to an afflicted individual one or both of a nitric oxide substrate and/or nitric acid donor, alone or optionally in combination with a progestin or, in the case of non-pregnant female, either a progestin or an estrogen or both.
Patent CH-670545G-A3 (CH)
IPC: G04G7/02
Filed: 1987-10-28
Abstract: A plurality of radio transmitters (A,B,C) connected to a control means (1) via lines (2) are synchronised when they send their times by radio to a receiver (R) of the control means, whose distance from the transmitters is known. The reception time of the messages is recorded and transmitted to the senders. These correct their instantaneous time by means of the transmitted time and the known signal propagation times. As a result, a simple and rapid synchronisation is possible. <IMAGE>
Patent CH-653206G-A3 (CH)
IPC: G04C3/14
Filed: 1983-09-16
Abstract: A method of controlling a stepping motor comprises supplying the motor with a predetermined quantity of energy Eio from whence there will result an automatic adaptation of the width of the motor drive pulse to the voltage Uo at the motor terminals and the resistance Ri of the energy source. At the moment when the internal energy Ei(t) supplied to the motor, as defined by the integral over a time period of the product of Uo-RI and the current It circulating in the motor winding, becomes equal to Eio the drive pulse is cut off (R is the resistance of the motor winding). The circuit for practicing the method according to the invention includes means for measuring the voltage Uo and the energizing current I(t), means for obtaining the difference Uo-RI, a multiplier for forming the product (Uo-RI)I(t) and an integrator the output of which provides a voltage proportional to the internal energy Ei(t).
Patent CZ-264390-A3 (CZ)
Title: Device for electrokinetic removal of salts from masonry
Inventor: STEININGER KARL HEINZ DR DIPL
IPC: B01D61/56
Filed: 1990-05-29
Abstract: A device for electrokinetic desalination of brickwork consists of at least one positive, salt-collecting electrode (2) arranged on or in the brickwork in contact with a buffer material (9) which immobilizes the ions, at least one negative electrode (4) to which a continuous voltage is applied and an arrangement of anodes one electrode of which is in contact with a buffer material for use in the device. The positive electrode is completely coated with a layer of the buffer material, except at the connection ends, and a separating layer (10) is applied to the layer of buffer material.
Patent CZ-111998-A3 (CZ)
Title: Two-stage bio-aeration process and apparatus for making the same
Inventor: TOPOL JAN
IPC: C02F11/02
Filed: 1998-04-10
Abstract: In the present invention there is disclosed two-stage biological sewage treatment process using fluidized activated sludge. The process is characterized in that sewage is supplied into an equalizing tank and during filling a reactor, sewage is subsequently pumped by a crude water pump into a reactor for additional treatment. During filling from the minimum to the maximum level, the reactor is aerated, whereby the equalizing tank is aerated during the emptying phase of the reactor from the maximum to the minimum level. Claimed is also a two-stage biological sewage treatment plant using fluidized activated sludge wherein the plant comprises an equalizing tank /1/ with sewage inlet /3/ and an excessive sludge pump /12/, a maximum and minimum level float switch /26/, a purified water pump /13/, an aeration device /11/, a float change-over switch /7/ maintaining a hold mode in the tank /1/ for blocking the purified water pump /13/, wherein in the reactor /2/ there is situated at the level between the maximum and minimum levels a float change-over switch /4/ of the purified water pump /13/.
Patent CZ-127393-A3 (CZ)
Title: Packaging cardboard box for a paper stack
Inventor: ROTTENSTEINER NORBERT DIPL ING
IPC: B65D5/68
Filed: 1993-06-25
Abstract: The lid (11) is stuck onto the two larger side walls of the lower box. It is preferably stuck onto the unfolding side face only in the upper corners. The corresponding side face (14) of the lid has a weak line (20) round the adhesive spots (19). By providing grooves on the side wall of the lid stuck to the folding side wall of the lower box it is possible to separate the lid and swivel it round the opposite edge between the lid surface and side wall.
Patent CZ-145897-A3 (CZ)
Title: Refractory composition and process for producing refractory bodies
Inventor: KRIECHBAUM GANGOLF W
IPC: B28B1/14
Filed: 1997-05-13
Abstract: A castable refractory composition comprising: (a) 50-90 volume percent coarse particulates having a particle size between about 1 and 60 mm; and (b) 10-40 volume percent fine filler materials having a particle size distribution of between 0.0001 to 3 mm.
Patent CZ-152793-A3 (CZ)
Inventor: SUMICHRAST PAVEL
IPC: B65F1/00
Filed: 1993-07-28
Abstract: Zásobník sestává alespoň ze dvou navzájem rozebíratelně
připojených sběrných nádob (2), z nichž každá má ve své
horní části alespoň jeden vstupní otvor, výhodně opatřený
víkem (9). Sběrné nádoby (2) mohou být uloženy na a/nebo
v nosiči (1).
Patent CZ-154694-A3 (CZ)
Title: Drying and atomizing method and apparatus for making the same
Inventor: AUBERT BRUNO
IPC: F26B3/12
Filed: 1992-12-22
Abstract: FIELD: product drying and spraying in solution or in suspended form in liquid. SUBSTANCE: method involves, essentially, injection of mentioned solution of suspension in crosswise direction into single-mode waveguide 3 wherein microwave radiation is propagated at standing wave mode. Device for implementing this method is shown in description of the invention. EFFECT: facilitated procedure. 1 dwg
Patent CZ-162495-A3 (CZ)
Title: Device for preventing starting of a controllable mechanism for retention a passenger close to a vehicle
Inventor: MAZUR JOSEPH F
IPC: G06K7/08
Filed: 1995-06-20
Abstract: An apparatus (20) for preventing actuation of an air bag restraining device (25) of a vehicle includes a weight sensor (36), a distance sensor (42), and a seat belt payout sensor (66). A controller (22) is operatively connected to the sensors (36, 42, 66) and to the air bag restraining device (25). The controller (22) prevents actuation of the air bag when the sensors (36, 42, 66) sense a rearward facing child seat (46) on the occupant seat (40) by sensing a weight of an object less than a predetermined amount, a distance to an object on the seat (40) less than a predetermined amount, and a seat belt payout of greater than a predetermined amount.
Patent CZ-200326-A3 (CZ)
Title: Use of (deaminohydroxy)toremifene for treating climacteric diseases in women during menopause or after menopause
Inventor: HALONEN KAIJA
IPC: A61K31/075
Filed: 2001-05-02
Abstract: This invention relates to a method for inhibition of skin atrophy, or epithelial or mucosal atrophy in women, or to a method for treatment or prevention of symptoms related to said atrophy, said method comprising administering to the woman an effective amount of the compound of formula (I) or a geometric isomer, a stereoisomer, a pharmaceutically acceptable salt, an ester thereof or a metabolite thereof.
Patent CZ-213495-A3 (CZ)
Title: Process for producing a metallic part coated with mineral substances
Inventor: PERRIN DIDIER
IPC: C23D5/00
Filed: 1994-02-23
Abstract: Method of manufacture of a metal part (1) coated with several layers (4, 5, 6) of mineral materials, said method allowing some oxidation of the metal part's surface. The invention also concerns a hollow revolving part manufactured according to the above-mentioned method. The manufacture of the hollow revolving part comprises the following stages wherein a liquid casting is subjected to: a treatment using magnesium, an inoculation process and a centrifugal operation during which the first layer (4) of the coating (2) is applied to the metal part. The metal part of the invention is for use in the transport of aggressive fluids.
Patent CZ-230499-A3 (CZ)
Title: Sowing machine
Inventor: KIRCH MICHEL
IPC: A01B49/04
Filed: 1999-06-23
Abstract: The seed sowing machine is constructed on a towed chassis (53), which carries the reference elements (17), by pivots (10), which allow vertical movement from the transport position into the working position. The seeding mechanism (56) is supported by a carrying structure (61), which is linked to the chassis by similar pivots (81). In the working position, devices (86,88) are fitted to limit the displacements of the reference elements and the carrying structure respectively.
Patent CZ-242497-A3 (CZ)
Title: Process for preparing polyethylene with high flow index and close distribution of molecular weights
Inventor: SINDELAR PAVEL ING CSC
IPC: C08F4/69
Filed: 1997-07-30
Abstract: A process of preparing polyethylene with high flow index and narrow distribution of molecular masses, using a catalytic system with silyl chromate compounds for initiation of the polymerisation of 1-alkene monomer. The principle of the synthesis of the catalytic system is to ensure the interaction of silyl chromate with OH silica groups by just one ester group and thereby production of the active core having a linear structure. Individual compounds of the catalytic system react together in the following sequence:a) a bearer containing a suitable type of OH group,b) a silyl chromate compound, deoxygenated and dehydrated before contact with the porous bearer,c) an alkylating agent, which can be either only an organic metal compound of aluminium or combination of organic aluminium and organic magnesium compounds, whereas the ratios between individual compounds fluctuate in the following ranges: the content of silyl chromate on the bearer between 0.05 and 0.35 % of the bearer, the molar ratio between the total quantity of organic metals (ORG) and silyl chromate (expressed by the schematic relationship ORG/Cr) ranges from 0.5 to 20, optimally 1 to 9, and reciprocal ratio of organic aluminium and organic magnesium compounds Al:Mg fluctuates between 10:0.1 to 0.1:10.
Patent CZ-279997-A3 (CZ)
Title: K proteinase variants with reduced adsorption and increased capability of hydrolysis
Inventor: BRODE PHILIP FREDERICK
IPC: C12N9/58
Filed: 1996-03-06
Abstract: The present invention relates to proteinase K variants having a modified amino acid sequence of wild-type proteinase K amino acid sequence, the wild-type amino acid sequence comprising a first loop region, a second loop region, a third loop region, a fourth loop region, a fifth loop region and a sixth loop region; wherein the modified amino acid sequence comprises different amino acids than that occurring in wild-type proteinase K (i.e., substitution) at specifically identified positions in one or more of the loop regions whereby the proteinase K variant has decreased adsorption to, and increased hydrolysis of, an insoluble substrate as compared to the wild-type proteinase K. The present invention also relates to DNA sequences encoding such proteinase K variants. The present invention also relates to compositions comprising such proteinase K variants for cleaning a variety of surfaces.
Patent CZ-9903296-A3 (CZ)
Inventor: TALLIER BERNARD
IPC: A24C5/18
Filed: 1999-09-17
Abstract: Způsob odstranění nánosu tabáku obsahuje krok detekce
vzniku nánosu tabáku v určité části stroje (1) pomocí alespoň
jednoho čidla (35, 383, 420) a krok předání signálu o zanesení
a místu nahromadění tabáku do řídící jednotky (50). Řídící
jednotka (50) postupně řídí zastavení chodu alespoň části
linky pro formování (4) tabákového provazce, zastavení
pohonu prostředků (31, 32, 33, 36, 37), tvořících alespoň část
linky pro přivádění (3) tabáku, otevření alespoň jedné
usměrňovači klapky (43) umístěné uvnitř stroje (1), na kterou
dopadá tabák, obsažený ve stroji (1), a která tento tabák
usměrňuje k prostředkům pro odvádění (44, 440, 441), které
jej dopraví do části (300) vnitřního zásobníku (30), rozevření
alespoň jedné boční stěny (380, 421) alespoň jednoho potrubí
(38, 40), kterým prochází tabák při normálním chodu stroje
(1) tak, aby tabák účinkem gravitace volně padal do spodní
části stroje (1), aktivaci prostředků pro odstranění nánosu
(410; 402; 360) podle místa, kde k zanesení došlo, odvádění
tabáku přestavitelnou usměrňovači klapkou nebo klapkami
(43) a prostředky k odvádění, uzavření uvedené boční stěny
nebo stěn (380, 421) potrubí (38, 42), která vedou proud
tabáku ve stroji (1) při jeho normálním chodu, uzavření
usměrňovači klapky nebo klapek (43), obnovení chodu stroje
(1). Stroj (1) na tabákové výrobky je uspořádán alespoň z
jedné plnící linky (2), z alespoň jedné linky pro přivádění (3)
tabáku a z alespoň jedné linky pro formování (4) tabákového
provazce s alespoň jedním porézním pásem (41) běžícím
podélně ve spodní části sací komoiy (40) a z hnacích
prostředků (5) s řídící jednotkou (50).
Patent CZ-359297-A3 (CZ)
Inventor: OSTERODE THOMAS
IPC: C04B41/86
Filed: 1997-11-13
Abstract: Řešení se týká způsobu výroby vypalovaných stavebních desek z hlíny, zejména krytinových tašek, které jsou na svém povrchu engo- bované nebo glazované.
Patent CZ-9903752-A3 (CZ)
Title: Wire netting for protection against falling stones or for securing surface layer of soil, process of its manufacture and apparatus for making the same
Inventor: EICHER BERNHARD
IPC: B21J15/02
Filed: 1999-02-02
Abstract: A wire netting, preferably used as a gravel screen or for protecting a soil surface layer is woven from corrosion-resistant wires and either fitted on the soil surface or secured in an almost upright position on a slope or something similar. The wires in the wire netting are manufactured from heavy-duty steel, which has a nominal strength in the region of 1000 to 2200 N/mm2 and steel wire may be used for this for stranded wires or spring steel wire. The wire netting is manufactured from rectangular, diagonal netting and it has a three-dimensional, mattress-like structure.
Patent CZ-429499-A3 (CZ)
Inventor: HANSEN STEFFEN
IPC: A61M5/24
Filed: 1998-06-08
Abstract: Injekční stříkačka (1) má pouzdro s uloženou ampulí (3)
obsahující lék postačující pro více dávkovaných injekcí,
tlačítko (7) injekce, pístnici (13) pro spolupráci s pístemv
ampulí (3) při vstřikování, a dávku nastavovací mechanismus
obsahující otáčivou, dávku nastavovací část (5) propojenou s
tlačítkem(7). Dávku nastavovací mechanismus dále obsahuje
dávku řídící kolečko (11) spojení s pístnici (13) a spřahující
prstenec (12) spojený s dávku nastavovací částí (5) a tlačítkem
(7). Jedno z řečeného dávku řídícího kolečka (11) a
spřahujícího prstence (12) alespoň částečně obklopuje druhé,
a dávku řídící kolečko (11) a spřahující prstenec (12)jsou
uspořádány tak, že otáčení dávku nastavovací části (5)
umožňuje otáčení spřahujícího prstence (12) vjednomnebo
druhémsměru ve vztahu k dávku řídícímu kolečku (11),
zatímco aktivace tlačítka (7), a tímto otáčení spřahujícího
prstence (12), působí otáčení dávku řídícího kolečka (11).
Patent CZ-9804316-A3 (CZ)
Title: Flotation plant
Inventor: STRNAD JOSEF ING
IPC: B03D1/22
Filed: 1998-12-28
Abstract: The proposed flotation plant comprises a tank (1) accommodating at least one inlet of polluted water and pressure, air-saturated water, whereby it is provided with a scum collecting device (25), which is coupled with scum discharge and the tank (1) is connected with a discharge piping (700) of purified water. Inside the tank (1) there is mounted in rotatable manner about its vertical axis an internal tank (2) that is coupled with a drive and that has on open bottom (22), whereby in said open bottom (22) ground plan there is situated outlet of at least one supply piping for polluted water and/or pressure, air-saturated and at the level below the internal tank upper edge the tank (1) is provided with a purified water discharge.
Patent SK-155097-A3 (SK)
Title: Carboxylic acid derivative preparation process
Inventor: FUCHS EBERHARD
IPC: C07D213/82
Filed: 1996-05-07
Abstract: A process is disclosed for preparing carboxylic acid derivatives having the general formula (I), in which X stands for OR<2> or NH2, R<1> stands for C1-C20 alkyl, C1-C20 hydroxyalkyl, C3-C12-cycloalkyl, C4-C12 alkyl-cycloalkyl, C4-C12-cycloalkyl-alkyl, C5-C20 alkyl-cycloalkyl-alkyl, aryl, C7-C20 aralkyl, C7-C20 alkylaryl, an heteroaliphatic or heteroaromatic ring with 5 to 8 carbon atoms and R<2> stands for C1-C20 alkyl, from carboxylic acid nitriles having the general formula (II) R<1>-CN, in which R<1> has the above-mentioned meanings, and from alcohols having the general formula (III) R<2>-OH, in which R<2> has the above-mentioned meanings. The reaction is carried out in the liquid phase at temperatures from 50 to 300  DEG C and pressures from 0.1 to 350 bars in the presence of an heterogeneous catalyst.
Patent SK-163598-A3 (SK)
Title: Methods and compositions useful for inhibition of angiogenesis
Inventor: BROOKS PETER
IPC: C07K14/78
Filed: 1997-05-30
Abstract: The present invention describes methods for inhibition of angiogenesis in tissues using vitronectin alphavbeta3 antagonists, and particularly for inhibiting angiogenesis in inflamed tissues and in tumor tissues and metastases using therapeutic compositions containing alphavbeta3 antagonists.
Patent SK-282006-A3 (SK)
Title: Rubber mixture for production of vulcanisates with improved mechanical and dynamic-mechanical properties
Inventor: KRAMAROVA ZUZANA
IPC: C08K3/00
Filed: 2006-02-16
Abstract: The rubber mix for vulcanized products of enhanced mechanical and dynamic properties has fillers, starch and silica with or without binder. The e.g. maize vegetable sta rch is employed in a composition with the filler and silica sum content at 5-99 per cent by volume.
Patent SK-672003-A3 (SK)
Title: Stable salts of o-acetylsalicylic acid with basic amino acids
Inventor: FRANCKOWIAK GERHARD
IPC: A61K31/616
Filed: 2001-07-05
Abstract: The invention relates to stable salts of o-acetylsalicyclic acid with basic amino acids, to a method for producing them and to their use as medicaments.
Patent BE-1000988-A3 (BE)
Title: Werkwijze voor het afmeten van een draadlengte en inrichting die deze werkwijze toepast.
IPC: D03J1/16
Filed: 1987-10-09
Granted: 1989-05-30
Abstract: Werkwijze en inrichting voor het afmeten van een draadlengte, meer speciaal waarbij een draad (6) op een voorraadspoel (2) wordt gewikkeld en automatisch in draadstukken met een gewenste lengte wordt gesneden.
Patent BE-1003128-A3 (BE)
Title: Procede de regeneration de sable de fonderie usage lie principalement a l'argile.
Inventor: SATMER FRANZ
IPC: B22C5/00
Filed: 1990-11-21
Granted: 1991-12-03
Abstract: Dans le procédé de régénération de sable de fonderie usagé, on accélère et on freine de façon répéptée les grains de sable, on les gratte par des sollicitations combinées aux chocs et au cisaillement et on les libère ainsi des enveloppes de produits d'addition et de liant fixés sur les grains. Pendant le traitement, on aspire de façon controlée dans un séparateur à cyclone 3 la poussière 2 grattée des grains de sable dans un tambour tournant 1 de traitement du sable. Application à la récupération de la bentonite et des produits carbonés afin de réduire la pollution de l'environnement.