SU1022650A3 - Hollow semipermeable fibre - Google Patents
Hollow semipermeable fibre Download PDFInfo
- Publication number
- SU1022650A3 SU1022650A3 SU782691657A SU2691657A SU1022650A3 SU 1022650 A3 SU1022650 A3 SU 1022650A3 SU 782691657 A SU782691657 A SU 782691657A SU 2691657 A SU2691657 A SU 2691657A SU 1022650 A3 SU1022650 A3 SU 1022650A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- fibers
- hollow
- fiber
- fluid
- microns
- Prior art date
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 24
- 239000012510 hollow fiber Substances 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 239000006185 dispersion Substances 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract 7
- 239000012528 membrane Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 206010051602 Laziness Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229940073610 elocon Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- WOFMFGQZHJDGCX-ZULDAHANSA-N mometasone furoate Chemical compound O([C@]1([C@@]2(C)C[C@H](O)[C@]3(Cl)[C@@]4(C)C=CC(=O)C=C4CC[C@H]3[C@@H]2C[C@H]1C)C(=O)CCl)C(=O)C1=CC=CO1 WOFMFGQZHJDGCX-ZULDAHANSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/447—Yarns or threads for specific use in general industrial applications, e.g. as filters or reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
- B01D69/084—Undulated fibres
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
:ится к химичесИзобретение отно· кой технологии, связанной с процессами разделения сме:ей на полупроницаемых мембранах, и ратам для разделени ки полых полупроницаемых волоконThe invention relates to a technology related to the separation of mixtures: on semi-permeable membranes, and to frames for separating hollow semi-permeable fibers
Известны различнее аппараты с полупроницаемыми мемб ранами ными в виде полых в элокон аппаратах можно раз зить большую поверхность мембран в них использованы воЬокна с диаметром 20-250 мкм, которые могут выдержать большой перепад давления Щ конкретно к аппаϊ, содержащим пуч, выполнен. В этих единице объема, и И·Devices with semipermeable membranes in the form of hollow in elocon devices are known to be more distinct. It is possible to split a large surface of membranes. They use fibers with a diameter of 20–250 μm, which can withstand a large pressure drop Щ specifically to the apparatus containing the beam. In these units of volume, and And
Основным недостатком известных ап-t5 паратов является тр/дность доступа разделяемой смеси к пучка из-за их соприкосновения друг с другом. Кроме тог кают неравномерност значит, ления потоку раэдел|’ неравномерности спо: нию эффективности Р: из-за различных кон; лений.The main disadvantage of the known up-t5 devices is the accessibility of the shared mixture to the beam due to their contact with each other. In addition, they show unevenness, which means that there is a lack of uniformity in the flow | ’of variations in efficiency: P: due to different con; laziness.
Наиболее близким : является'полое полуп; локно, предназначена вания в аппаратах дг я разделения смесей. Полое волоки де хаотически скруче пленных между собой местах, благодаря че: дисперсионносгь поте;The closest: is a hollow half; locally, it is intended in the apparatus for the separation of mixtures. The hollow die is randomly stranded between places, due to the following: dispersion sweat;
Однако при этом уменьшается плотность укладки полых рате, наличие больше крещиваний и мест св собой полых волокон номерность их омывав смесью, готовления и стоимос волокон.However, this reduces the packing density of the hollow ratae, the presence of more baptisms and places of hollow fibers, washing their number by washing with the mixture, the preparation and cost of the fibers.
Цель изобретения фективности разделе? номерного обтекания разделяемой смесью.The purpose of the invention is the efficiency section? number flow around the shared mixture.
Указанная цель достигается тем, что полое полупроницаемое волокно выполнено волнообразным по длине с амплитудой волн не Еолее 50% наружного диаметра волоква и частотой волн 0,2-10 на 1 смThis goal is achieved by the fact that the hollow semipermeable fiber is made wavy in length with a wave amplitude of not more than 50% of the outer diameter of the fiber and a wave frequency of 0.2-10 per 1 cm
Средняя амплитуд^ извитков составляет 1-30% наружного диаметра волокна, а отношение среднего периода извитости к средней частоте извитости - от 0,1:1 до 1:1.The average amplitude of the crimps is 1-30% of the outer diameter of the fiber, and the ratio of the average crimp period to the average crimp frequency is from 0.1: 1 to 1: 1.
Выполненные таким образом полые .волокна особенно выгодны при сборволокнам внутри э, в пучке вознии плотности, а и гидравлического сопротивчемой смеси. Эти зобствуют снижеазделения смеси центрациояных явк предлагаемому роницаемое воое для использоо выполнено в винных нитей,скрев нескольких му улучшается ка [3] .Hollow fibers made in this way are especially advantageous when collecting fibers inside the e, in a beam of fussing density, and also in a hydraulic resistant mixture. These overshadow the lower separation of the mixture of centralized appearances of the proposed radonized howl for use in wine strands, the cure of several mu improves [3].
волокон в аппаго числа перерепления между создает неравия разделяемой увеличивается сложность изть пучков полыхthe fibers in the appago of the number of intergrowths between creates an inequality of separable increases the difficulty of emitting hollow
- повышение эфия за счет равполых волокон длины волокна- increase in ether due to isosome fibers of fiber length
ВНИИПИVNIIIPI
Заказ 4076/51Order 4076/51
Филиал П1ПBranch P1P
Патент, ке пучков для комплектации аппаратов. В пучках полые волокна ориентированы почти параллельно друг другу, поэтому плотность укладки волокон значительно повышается. В то же время достигается хорошее распределение разделяемой смеси между волокнами, поскольку амплитуда извитости не, столь велика, чтобы происходила нежелательная переплетаемость. Наилучшие результаты получены при амплитуде извитости, не превышающей 50% диаметра полого волокна. В пучке полые волокна находятся в фиксированном относительно друг друга положении, что предотвращает образование продольных каналов для проходе! разделяемой смеси.Patent, ke beams for equipment bundles. In bundles, the hollow fibers are oriented almost parallel to each other, therefore, the fiber packing density is significantly increased. At the same time, a good distribution of the shared mixture between the fibers is achieved, since the crimp amplitude is not so large that undesirable entanglement occurs. The best results were obtained with a tortuosity amplitude not exceeding 50% of the diameter of the hollow fiber. In the bundle, the hollow fibers are in a position fixed relative to each other, which prevents the formation of longitudinal channels for passage! shared mixture.
Диаметры полых волокон могут быть выбранычв широком диапазоне, однако толщина стенки должна быть достаточно большой для сохранения извитости. Наружный диаметр полых волокон может быть от 50 до 800 мкм, при этом амплитуда извитости составляет 10200 мкм.The diameters of the hollow fiber can be chosen in a wide range of hours, however, the wall thickness should be large enough to maintain crimp. The outer diameter of the hollow fibers can be from 50 to 800 microns, while the amplitude of the crimp is 10,200 microns.
Волны на единичном полом волокне не обязательно должны быть непрерывными по реей его длине, а могут располагаться участками. При этом частота извитков на участках может различаться. Средняя частота извитков составляет 0,2-10, а в оптимальном варианте 0,25-5 на 1 см.Waves on a single hollow fiber need not be continuous along its length, but may be located in sections. In this case, the frequency of the tortuosity in the areas may vary. The average frequency of the twists is 0.2-10, and in the best case, 0.25-5 per 1 cm.
Предлагаемые полые волокна можно собирать в пучки любой удобной конфигурации, сечение пучка может быть круглым, овальным и т.п. на плотность упаковки волокон.в пучке влияют амплитуда извитков, их частота и сжатие пучка. Обычно коэффициент упаковки пучка составляет 45-65%. Для пучков круглого сечения диаметр их может изменяться от 0,02 до 1 м в зависимости от способа подачи в пучок разделяемой смеси. Извитости полого волокна в одном пучке могут иметь одинаковую или разную амплитуду. Кроме того, пучок может содержать до 50% полых волокон, не имеющих извитости, которые равномерно распределены среди извитых полых волокон.We offer hollow fibers can be collected in bundles of any convenient configuration, the beam cross section can be round, oval, etc. on the packing density of the fibers. in the beam is influenced by the amplitude of the twists, their frequency and compression of the beam. Typically, the beam packing ratio is 45-65%. For round beams, their diameter can vary from 0.02 to 1 m, depending on the method of supplying the mixture to be separated. Curvatures of a hollow fiber in one bundle can have the same or different amplitude. In addition, the bundle can contain up to 50% hollow fibers without crimping, which are evenly distributed among the crimped hollow fibers.
Таким образом, за счет применения извитостей небольшой амплитуды достигаются высокие плотности укладки полых волокон в пучках; равномерное обтекание волокой разделяемой смесью;Thus, through the use of crimps of small amplitude, high stacking densities of hollow fibers in bundles are achieved; uniform flow around the wire with a shared mixture;
.уменьшение сложности изготовления мембранных аппаратов путем устранения мест склейки полых волокон между собой; снижение гидравлического сопротивления потоку разделяемой смеси.. Reducing the complexity of the manufacture of membrane devices by eliminating the bonding places of hollow fibers together; reduction of hydraulic resistance to the flow of the shared mixture.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US85585077A | 1977-11-30 | 1977-11-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1022650A3 true SU1022650A3 (en) | 1983-06-07 |
Family
ID=25322238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU782691657A SU1022650A3 (en) | 1977-11-30 | 1978-11-29 | Hollow semipermeable fibre |
Country Status (22)
Country | Link |
---|---|
JP (1) | JPS583047B2 (en) |
AU (1) | AU510106B2 (en) |
BE (1) | BE872380A (en) |
BR (1) | BR7807845A (en) |
CA (1) | CA1114307A (en) |
DD (1) | DD140000A5 (en) |
DE (1) | DE2851687C2 (en) |
ES (2) | ES475458A1 (en) |
FR (1) | FR2410494B1 (en) |
GB (1) | GB2009034B (en) |
GR (1) | GR67310B (en) |
IL (1) | IL56081A (en) |
IN (1) | IN149938B (en) |
IT (1) | IT1192290B (en) |
LU (1) | LU80600A1 (en) |
NL (1) | NL7811649A (en) |
NO (1) | NO146625C (en) |
PT (1) | PT68842A (en) |
SE (1) | SE7812302L (en) |
SU (1) | SU1022650A3 (en) |
TR (1) | TR20777A (en) |
ZA (1) | ZA786707B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2461671C2 (en) * | 2008-05-19 | 2012-09-20 | ИЮКФ-ХИЮ (Индастри-Юниверсити Кооперейшн Фаундейшн Ханиянг Юниверсити) | Hollow fiber, composition of spin dope moulding hollow fiber and method for producing hollow fiber using this composition |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4238204A (en) * | 1979-06-18 | 1980-12-09 | Monsanto Company | Selective adsorption process |
DE3174204D1 (en) * | 1980-11-06 | 1986-04-30 | Paul Elsey | Portable power saw mill |
JPS5884007A (en) * | 1981-11-14 | 1983-05-20 | Toyobo Co Ltd | Hollow fibrous membrane for dialysis and its production |
JPS59112805A (en) * | 1982-12-20 | 1984-06-29 | Nitto Electric Ind Co Ltd | Preparation of liquid separation apparatus |
DE3347999C2 (en) * | 1983-01-17 | 1989-06-15 | Akzo Patente Gmbh, 5600 Wuppertal, De | Process for the production of bundles of corrugated hollow threads |
DE3301268A1 (en) | 1983-01-17 | 1984-07-26 | Akzo Gmbh, 5600 Wuppertal | METHOD AND DEVICE FOR PRODUCING HOLLOW BANDS |
JPS6245709A (en) * | 1985-08-21 | 1987-02-27 | Teijin Ltd | Permselective hollow yarn and fluid separator |
ES2054849T3 (en) * | 1987-10-29 | 1994-08-16 | Terumo Corp | OXYGENER USING POROUS HOLLOW FIBER MEMBRANES. |
DE3805414C1 (en) * | 1988-02-22 | 1989-09-07 | Secon Gesellschaft Fuer Separations- Und Concentrationstechnik Mbh, 3402 Dransfeld, De | |
EP0519132A1 (en) * | 1989-10-18 | 1992-12-23 | Exxon Research And Engineering Company | Hollow fiber module |
JPH0763592B2 (en) * | 1989-11-02 | 1995-07-12 | テルモ株式会社 | Hollow fiber membrane and hollow fiber membrane type artificial lung using the same |
JPH03158166A (en) * | 1989-11-17 | 1991-07-08 | Terumo Corp | Hollow fiber membrane type fluid treating device |
US5234591A (en) * | 1991-12-04 | 1993-08-10 | Exxon Research & Engineering Company | Counter-current flow hollow fiber permeator |
US5779897A (en) * | 1996-11-08 | 1998-07-14 | Permea, Inc. | Hollow fiber membrane device with inert filaments randomly distributed in the inter-fiber voids |
US6322703B1 (en) * | 1999-04-20 | 2001-11-27 | Asahi Kasei Kabushiki Kaisha | Method for purifying aqueous suspension |
DE10007327A1 (en) * | 2000-02-17 | 2001-08-30 | Fresenius Medical Care De Gmbh | Filter device, preferably hollow fiber dialyzer with curled hollow fibers |
EP2815807A1 (en) * | 2013-06-20 | 2014-12-24 | Gambro Lundia AB | Capillary dialyzer comprising crimped hollow fibres |
PL3412358T3 (en) | 2014-02-06 | 2022-09-19 | Gambro Lundia Ab | Membrane for blood purification |
CN111545068A (en) * | 2014-02-06 | 2020-08-18 | 甘布罗伦迪亚股份公司 | Hemodialyzer for blood purification |
DE102016002440A1 (en) | 2016-03-01 | 2017-09-07 | Fresenius Medical Care Deutschland Gmbh | Hollow fiber membrane with three-dimensional curl |
WO2021100811A1 (en) * | 2019-11-20 | 2021-05-27 | ニプロ株式会社 | Hollow fiber membrane module |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3616928A (en) * | 1969-10-02 | 1971-11-02 | Du Pont | Permeation separation device for separating fluids |
FR2199014B1 (en) * | 1972-09-12 | 1975-03-14 | Rhone Poulenc Ind | |
JPS5125486A (en) * | 1974-07-24 | 1976-03-02 | Egon Shuuraa Kaato |
-
1978
- 1978-04-10 IN IN390/CAL/78A patent/IN149938B/en unknown
- 1978-11-28 NL NL7811649A patent/NL7811649A/en not_active Application Discontinuation
- 1978-11-28 ES ES475458A patent/ES475458A1/en not_active Expired
- 1978-11-29 DD DD78209385A patent/DD140000A5/en unknown
- 1978-11-29 AU AU42027/78A patent/AU510106B2/en not_active Expired
- 1978-11-29 DE DE2851687A patent/DE2851687C2/en not_active Expired
- 1978-11-29 PT PT68842A patent/PT68842A/en unknown
- 1978-11-29 TR TR20777A patent/TR20777A/en unknown
- 1978-11-29 NO NO784013A patent/NO146625C/en unknown
- 1978-11-29 JP JP53147727A patent/JPS583047B2/en not_active Expired
- 1978-11-29 BR BR7807845A patent/BR7807845A/en unknown
- 1978-11-29 GB GB7846497A patent/GB2009034B/en not_active Expired
- 1978-11-29 LU LU80600A patent/LU80600A1/en unknown
- 1978-11-29 BE BE192024A patent/BE872380A/en not_active IP Right Cessation
- 1978-11-29 FR FR7833725A patent/FR2410494B1/en not_active Expired
- 1978-11-29 IT IT30319/78A patent/IT1192290B/en active
- 1978-11-29 GR GR57771A patent/GR67310B/el unknown
- 1978-11-29 IL IL56081A patent/IL56081A/en unknown
- 1978-11-29 SE SE7812302A patent/SE7812302L/en unknown
- 1978-11-29 ZA ZA00786707A patent/ZA786707B/en unknown
- 1978-11-29 CA CA317,048A patent/CA1114307A/en not_active Expired
- 1978-11-29 SU SU782691657A patent/SU1022650A3/en active
-
1979
- 1979-05-16 ES ES480626A patent/ES480626A1/en not_active Expired
Non-Patent Citations (1)
Title |
---|
1. Патент ОНА 3228877, к . 210-321, опублик. 1969. 2.Патент US 3339341, кл. 210-321, опублик. 1969. 3.Патент US 3616928, г кл. 210-321, опублик. 1971. * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2461671C2 (en) * | 2008-05-19 | 2012-09-20 | ИЮКФ-ХИЮ (Индастри-Юниверсити Кооперейшн Фаундейшн Ханиянг Юниверсити) | Hollow fiber, composition of spin dope moulding hollow fiber and method for producing hollow fiber using this composition |
RU2461671C9 (en) * | 2008-05-19 | 2013-02-27 | ИЮКФ-ХИЮ (Индастри-Юниверсити Кооперейшн Фаундейшн Ханиянг Юниверсити) | Hollow fiber, composition of spin dope moulding hollow fiber and method for producing hollow fiber using this composition |
Also Published As
Publication number | Publication date |
---|---|
NO146625C (en) | 1982-11-10 |
JPS5488317A (en) | 1979-07-13 |
DD140000A5 (en) | 1980-02-06 |
SE7812302L (en) | 1979-05-31 |
ES475458A1 (en) | 1980-01-16 |
ZA786707B (en) | 1979-10-31 |
IL56081A (en) | 1982-07-30 |
JPS583047B2 (en) | 1983-01-19 |
TR20777A (en) | 1982-07-01 |
FR2410494A1 (en) | 1979-06-29 |
IT7830319A0 (en) | 1978-11-29 |
ES480626A1 (en) | 1980-01-16 |
AU4202778A (en) | 1979-06-28 |
NL7811649A (en) | 1979-06-01 |
LU80600A1 (en) | 1979-06-15 |
GB2009034B (en) | 1982-04-15 |
FR2410494B1 (en) | 1986-05-02 |
GB2009034A (en) | 1979-06-13 |
BR7807845A (en) | 1979-07-31 |
IT1192290B (en) | 1988-03-31 |
IN149938B (en) | 1982-06-12 |
BE872380A (en) | 1979-05-29 |
NO784013L (en) | 1979-05-31 |
CA1114307A (en) | 1981-12-15 |
DE2851687C2 (en) | 1983-05-11 |
NO146625B (en) | 1982-08-02 |
DE2851687A1 (en) | 1979-05-31 |
IL56081A0 (en) | 1979-01-31 |
GR67310B (en) | 1981-06-29 |
PT68842A (en) | 1978-12-01 |
AU510106B2 (en) | 1980-06-05 |
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