Organic Chemistry kategória termékei

Clayden, Jonathan - Greeves, Nick - Warren, Stuart: Organic Chemistry idegen
idegen
Clayden, Jonathan - Greeves, Nick - Warren, Stuart

Organic Chemistry

Oxford University Press, 2012

Inspiring and motivating students from the moment it published, Organic Chemistry has established itself in just one edition as the stude...

Online ár:

34 551 Ft

Eredeti ár: 36 369 Ft

Bruckner, Reinhard: Organic Mechanisms: Reactions, Stereochemistry and Synthesis idegen
idegen
Bruckner, Reinhard

Organic Mechanisms: Reactions, Stereochemistry and Synthesis

Springer Berlin, 2010

"Much of life can be understood in rational terms if expressed in the language of chemistry. It is an international language, a language ...

Online ár:

53 755 Ft

Eredeti ár: 56 584 Ft

Nicolaou, K. C. - Sorensen, Erik J.: Classics in Total Synthesis idegen
idegen
Nicolaou, K. C. - Sorensen, Erik J.

Classics in Total Synthesis - Targets, Strategies, Methods

Wiley-VCH GmbH, 1996

An diesem Buch wird kein Organiker vorbeikommen. Mit didaktischem Gespür und großer Klarheit stellen K.C. Nicolaou und E. Sorensen bemerk...

Online ár:

41 867 Ft

Eredeti ár: 44 070 Ft

Sicker, Dieter - Zeller, Klaus-Peter - Siehl, Hans Ullrich - Berger, Stefan: Natural Products idegen
idegen
Sicker, Dieter - Zeller, Klaus-Peter - Siehl, Hans Ullrich - Berger, Stefan

Natural Products - Isolation, Structure Elucidation, History

Wiley-VCH, 2019

Dieses faszinierende Lehrbuch, durchgängig in Farbe, präsentiert einen herausragenden und modernen Ansatz für die Isolierung und Struktur...

Online ár:

39 192 Ft

Eredeti ár: 41 254 Ft

Vogel, Pierre - Houk, Kendall N.: Organic Chemistry Deluxe Edition idegen
idegen
Vogel, Pierre - Houk, Kendall N.

Organic Chemistry Deluxe Edition - Theory, Reactivity and Mechanisms in Modern Synthesis

Wiley-VCH GmbH, 2019

The know-how about reactivity, reaction mechanisms, thermodynamics and other basics in physical organic chemistry is the key for successf...

Online ár:

62 755 Ft

Eredeti ár: 66 057 Ft

Balci, Metin: Reaction Mechanisms in Organic Chemistry idegen
idegen
Balci, Metin

Reaction Mechanisms in Organic Chemistry

Wiley-VCH, 2022

Understanding organic reaction mechanisms is the key for understanding organic chemistry. That is the concept of this unique textbook whi...

Online ár:

40 242 Ft

Eredeti ár: 42 360 Ft

Tietze, Lutz F. - Eicher, Theophil - Diederichsen, Ulf - Speicher, Andreas - Schützenmeister, Nina: Reactions and Syntheses idegen
idegen
Tietze, Lutz F. - Eicher, Theophil - Diederichsen, Ulf - Speicher, Andreas - Schützenmeister, Nina

Reactions and Syntheses - in the Organic Chemistry Laboratory

Wiley-VCH, 2015

The second edition of this classic text book has been completely revised, updated, and extended to include chapters on biomimetic aminati...

Online ár:

35 148 Ft

Eredeti ár: 36 997 Ft

Nicolaou, K. C. - Chen, Jason S.: Classics in Total Synthesis 3 idegen
idegen
Nicolaou, K. C. - Chen, Jason S.

Classics in Total Synthesis 3 - Further Targets, Strategies, Methods

Wiley-VCH, 2011

Adopting his didactically skillful approach, K.C. Nicolaou compiles in this textbook the important synthetic methods that lead to a compl...

Online ár:

41 007 Ft

Eredeti ár: 43 165 Ft

Warren, Stuart - Wyatt, Paul: Workbook for Organic Synthesis idegen
idegen
Warren, Stuart - Wyatt, Paul

Workbook for Organic Synthesis - The Disconnection Approach

John Wiley & Sons, 2009

One approach to organic synthesis is retrosynthetic analysis. With this approach chemists start with the structures of their target molec...

Online ár:

23 169 Ft

Eredeti ár: 24 388 Ft

Scudder, Paul H.: Electron Flow in Organic Chemistry idegen
idegen
Scudder, Paul H.

Electron Flow in Organic Chemistry - A Decision-Based Guide to Organic Mechanisms

Wiley John + Sons, 2023

Using a mechanistic approach, this book helps students develop a good intuition for organic chemistry and the ability to approach and sol...

Online ár:

40 377 Ft

Eredeti ár: 42 502 Ft

Friebolin, Horst: Basic One- and Two-Dimensional NMR Spectroscopy idegen
idegen
Friebolin, Horst

Basic One- and Two-Dimensional NMR Spectroscopy

Wiley-VCH, 2011

This is the fifth edition of the highly successful, classic textbook for bachelor and master courses, with over 20 % new material and the...

Online ár:

29 198 Ft

Eredeti ár: 30 734 Ft

Ballini, Roberto - Palmieri, Alessandro: Nitroalkanes idegen
idegen
Ballini, Roberto - Palmieri, Alessandro

Nitroalkanes - Synthesis, Reactivity, and Applications

Wiley-VCH, 2021

Aimed at synthetic organic chemists in academia and industry, the book summarizes recent developments in the preparation of nitroalkanes,...

Online ár:

62 065 Ft

Eredeti ár: 65 331 Ft

Surya, K. de: Applied Organic Chemistry idegen
idegen
Surya, K. de

Applied Organic Chemistry - Reaction Mechanisms and Experimental Procedures in Medicinal Chemistry

Wiley-VCH, 2020

Aimed at researchers in academia and industry, this book summarizes the most relevant reactions and reagents used by organic chemists to ...

Online ár:

145 399 Ft

Eredeti ár: 153 051 Ft

Sulfur-Containing Polymers idegen
idegen

Sulfur-Containing Polymers - From Synthesis to Functional Materials

Wiley-VCH, 2021

Presents state-of-the-art synthesis of various sulfur-containing polymers from low-cost sulfur resources, along with their diverse proper...

Online ár:

66 277 Ft

Eredeti ár: 69 765 Ft

Smart Stimuli-Responsive Polymers, Films, and Gels idegen
idegen

Smart Stimuli-Responsive Polymers, Films, and Gels - Synthesis, Simulation and Applications

Wiley-VCH, 2022

Presents everything from synthesis to applications in emerging fields like biomedicine, electronics, sensors and more - a "must-have" for...

Online ár:

66 233 Ft

Eredeti ár: 69 718 Ft

Organometallic Chemistry in Industry idegen
idegen

Organometallic Chemistry in Industry - A Practical Approach

Wiley-VCH, 2020

Showcases the important role of organometallic chemistry in industrial applications and includes practical examples and case studies This...

Online ár:

43 780 Ft

Eredeti ár: 46 084 Ft

Cell-Penetrating Peptides idegen
idegen

Cell-Penetrating Peptides - Design, Development and Applications

Wiley-VCH, 2023

The modern reference on the rational design and development of cell-penetrating peptides (CPPs) for use in cellular delivery of drugs and...

Online ár:

66 252 Ft

Eredeti ár: 69 738 Ft

Zhang, Chaofeng - Wang, Feng: Lignin Conversion Catalysis idegen
idegen
Zhang, Chaofeng - Wang, Feng

Lignin Conversion Catalysis - Transformation to Aromatic Chemicals

Wiley-VCH, 2022

This book focuses on the research development of lignin conversion to aromatic compounds. It provides systematic results for the study of...

Online ár:

66 270 Ft

Eredeti ár: 69 757 Ft

Heterocycles idegen
idegen

Heterocycles - Synthesis, Catalysis, Sustainability, and Characterization

Wiley-VCH, 2022

Provides an useful update on the synthesis of heterocycles with a special focus on green and sustainable methods. A must-read for organic...

Online ár:

70 460 Ft

Eredeti ár: 74 168 Ft

CO2 as a Building Block in Organic Synthesis idegen
idegen

CO2 as a Building Block in Organic Synthesis

Wiley-VCH, 2020

This book presents the most important reactions which use CO2 as an effective building block in organic synthesis. Reactions like methyla...

Online ár:

66 273 Ft

Eredeti ár: 69 761 Ft

Fukuzumi, Shunichi: Electron Transfer idegen
idegen
Fukuzumi, Shunichi

Electron Transfer - Mechanisms and Applications

Wiley-VCH, 2020

Written by one of the top scientists in this field, this is a systematic overview of the fundamental concepts and powerful applications. ...

Online ár:

57 886 Ft

Eredeti ár: 60 932 Ft

Holiyachi, Megharaja: Stereoselective Direct Aldol Reactions idegen
idegen
Holiyachi, Megharaja

Stereoselective Direct Aldol Reactions - Stereoselective Direct Aldol Reactions of 4-Formylcoumarins with Ketone Catalyzed by L-Proline in Water

LAP LAMBERT Academic Publishing, 2019

One of the most important inventions in heterocyclic chemistry is to identify and develop suitable methods in an eco-friendly and sustain...

Online ár:

16 605 Ft

Eredeti ár: 17 478 Ft

McCapra, Frank - Gundermann, Karl-Dietrich: Chemiluminescence in Organic Chemistry idegen
idegen
McCapra, Frank - Gundermann, Karl-Dietrich

Chemiluminescence in Organic Chemistry

Springer-Verlag GmbH, 2011

The appearance of the first review in 1965 [1] and the first monograph in 1968 [2] on chemiluminescence demonstrated the extent of the ph...

Online ár:

44 541 Ft

Eredeti ár: 46 885 Ft

Ribozymes. 1+2 idegen
idegen

Ribozymes. 1+2 - 3 Volume Set

Wiley-VCH, 2021

Timely and unique in its breadth of content, this all-encompassing and authoritative reference on ribozymes documents the great diversity...

Online ár:

147 954 Ft

Eredeti ár: 155 741 Ft

Supramolecular Chemistry on Surfaces idegen
idegen

Supramolecular Chemistry on Surfaces - 2D Networks and 2D Structures

Wiley-VCH, 2022

2D Supramolecular Chemistry on surfaces is a highly emerging topic. This handbook presents all aspects like hydrogen-bonded frameworks, n...

Online ár:

57 889 Ft

Eredeti ár: 60 935 Ft

Schubert, Ulrich S. - Newkome, George R. - Winter, Andreas: Supramolecular Polymers and Assemblies idegen
idegen
Schubert, Ulrich S. - Newkome, George R. - Winter, Andreas

Supramolecular Polymers and Assemblies - From Synthesis to Properties and Applications

Wiley-VCH, 2021

Dieses Buch für Praktiker stammt aus der Feder eines renommierten internationalen Autorenteams und überzeugt durch seine einheitliche Dar...

Online ár:

64 649 Ft

Eredeti ár: 68 051 Ft

Homologation Reactions idegen
idegen

Homologation Reactions - Reagents, Applications, and Mechanisms

Wiley-VCH, 2023

This useful guide for designing effective transformations by using homologation reactions is a must-read for every synthetic chemist in a...

Online ár:

157 922 Ft

Eredeti ár: 166 233 Ft

Hughes, Andrew B.: Amino Acids, Peptides and Proteins in Organic Chemistry 1 idegen
idegen
Hughes, Andrew B.

Amino Acids, Peptides and Proteins in Organic Chemistry 1 - Volume 1 - Origins and Synthesis of Amino Acids

Wiley-VCH, 2009

Diese stark praxisbezogene Reihe in 5 Bänden schließt eine Lücke in der verfügbaren Fachliteratur. Alle international wichtigen Aminosäur...

Online ár:

85 485 Ft

Eredeti ár: 89 984 Ft

Lan, Yu: Computational Methods in Organometallic Catalysis idegen
idegen
Lan, Yu

Computational Methods in Organometallic Catalysis - From Elementary Reactions to Mechanisms

Wiley-VCH, 2021

The book includes a survey of mechanisms, and an extensive introduction to quantum mechanical computational methods in organometallic cat...

Online ár:

78 818 Ft

Eredeti ár: 82 966 Ft

Schubert, Ulrich S. - Winter, Andreas - Newkome, George R.: An Introduction to Redox Polymers for Energy-Storage Applications idegen
idegen
Schubert, Ulrich S. - Winter, Andreas - Newkome, George R.

An Introduction to Redox Polymers for Energy-Storage Applications

Wiley-VCH, 2023

Dieses Lehrbuch enthält nicht nur eine fundierte Einführung in das Thema Polymere und Batterien, sondern umfasst auch die Synthese und An...

Online ár:

53 846 Ft

Eredeti ár: 56 679 Ft

Ladder Polymers idegen
idegen

Ladder Polymers - Synthesis, Properties, Applications, and Perspectives

Wiley-VCH, 2023

Offering an overview of the recent accomplishments on ladder polymers, covers all major categories of ladder polymers like design, synthe...

Online ár:

66 262 Ft

Eredeti ár: 69 749 Ft

Chiral Building Blocks in Asymmetric Synthesis idegen
idegen

Chiral Building Blocks in Asymmetric Synthesis - Synthesis and Applications

Wiley-VCH, 2022

The work presents achievements in the field of preparation and applications of building blocks in asymmetric synthesis. An indispensable ...

Online ár:

82 975 Ft

Eredeti ár: 87 342 Ft

Polymer Crystallization idegen
idegen

Polymer Crystallization - Methods, Characterization and Applications

Wiley-VCH GmbH, 2023

Control the development of polymer crystals with this groundbreaking introduction Polymer crystallization is a crucial component of polym...

Online ár:

62 091 Ft

Eredeti ár: 65 358 Ft

Kim, Moon G.: Adhesives and Finishes for Wood idegen
idegen
Kim, Moon G.

Adhesives and Finishes for Wood - For Practitioners and Students

Wiley-VCH, 2023

The clear and structured approach provides an advanced introduction into wood adhesives and finishes for vocational students and practici...

Online ár:

66 308 Ft

Eredeti ár: 69 797 Ft

Barman, Pranjit - Singh, Anmol: Schiff Base Metal Complexes idegen
idegen
Barman, Pranjit - Singh, Anmol

Schiff Base Metal Complexes - Synthesis and Applications

Wiley-VCH GmbH, 2023

Presenting an important topic in a concisely and systematically way, this book covers every important aspect from synthesis to applicatio...

Online ár:

53 725 Ft

Eredeti ár: 56 552 Ft

Giuseppone, Nicolas: Out-of-Equilibrium (Supra)molecular Systems and Materials idegen
idegen
Giuseppone, Nicolas

Out-of-Equilibrium (Supra)molecular Systems and Materials

Wiley-VCH, 2021

This truly needed reference presents comprehensively every aspect about this emerging topic: Chapters about the design of dissipative sel...

Online ár:

87 124 Ft

Eredeti ár: 91 709 Ft

Brik, Ashraf: Total Chemical Synthesis of Proteins idegen
idegen
Brik, Ashraf

Total Chemical Synthesis of Proteins

Wiley-VCH, 2021

With contributions from a panel of experts representing a range of disciplines, this practical reference presents a carefully curated col...

Online ár:

111 828 Ft

Eredeti ár: 117 713 Ft

Hunger, Klaus - Heber, Thomas - Schmidt, Martin U. - Reisinger, Friedrich - Wannemacher, Stefan: Industrial Organic Pigments idegen
idegen
Hunger, Klaus - Heber, Thomas - Schmidt, Martin U. - Reisinger, Friedrich - Wannemacher, Stefan

Industrial Organic Pigments - Production, Crystal Structures, Properties, Applications

Wiley-VCH, 2018

Revised and updated, this highly acclaimed work, now in its fourth edition, remains the most comprehensive source of information availabl...

Online ár:

120 403 Ft

Eredeti ár: 126 740 Ft

Phytocannabinoids idegen
idegen

Phytocannabinoids - Unraveling the Complex Chemistry and Pharmacology of Cannabis sativa

Springer International Publishing, 2017

The book presents the current state of the art on phytocannnabinoid chemistry and pharmacology and will be of much use to those wishing t...

Online ár:

133 466 Ft

Eredeti ár: 140 490 Ft

Thermal Analysis of Polymeric Materials idegen
idegen

Thermal Analysis of Polymeric Materials - Methods and Developments

Wiley-VCH, 2022

This book delivers a detailed understanding of the thermal behaviour of the polymeric materials which aid in efficient analysis of polyme...

Online ár:

83 009 Ft

Eredeti ár: 87 377 Ft

Reichardt: Solvents and Solvent Effects i idegen
idegen
Reichardt

Solvents and Solvent Effects i

Wiley-VCH, 2010

Now in its 4th edition, this book remains the ultimate reference for all questions regarding solvents and solvent effects in organic chem...

Online ár:

98 188 Ft

Eredeti ár: 103 355 Ft

Organometallic Compounds idegen
idegen

Organometallic Compounds - Synthesis, Reactions, and Applications

Wiley-VCH, 2023

This book provides chronological progress in organometallic compounds (both synthetic and natural), their syntheses mechanisms and recent...

Online ár:

66 270 Ft

Eredeti ár: 69 757 Ft

Helicenes idegen
idegen

Helicenes - Synthesis, Properties and Applications

Wiley-VCH GmbH, 2022

World-leading experts comprehensively present the exciting field of helicene chemistry from synthesis to applications.

Online ár:

70 471 Ft

Eredeti ár: 74 180 Ft

Amide Bond Activation idegen
idegen

Amide Bond Activation - Concepts and Reactions

Wiley-VCH GmbH, 2022

Provides a thorough overview of the pivotal role of the amide bond in organic synthesis - an indispensable source of information for rese...

Online ár:

70 452 Ft

Eredeti ár: 74 160 Ft

Carnegie Mellon University, Gary Patterson: A Prehistory of Polymer Science idegen
idegen
Carnegie Mellon University, Gary Patterson

A Prehistory of Polymer Science

Springer Berlin, 2011

Polymer science is now an active and thriving community of scientists, engineers and technologists, but there was a time, not so long ago...

Online ár:

22 250 Ft

Eredeti ár: 23 421 Ft

Bio-Based Epoxy Polymers, Blends and Composites idegen
idegen

Bio-Based Epoxy Polymers, Blends and Composites - Synthesis, Properties, Characterization and Applications

Wiley-VCH GmbH, 2021

The book summarizes recent research progress on bioepoxy polymers as well as their blends and composites which can be used in a broad ran...

Online ár:

66 252 Ft

Eredeti ár: 69 738 Ft

Liu, Y. A. - Sharma, Niket: Integrated Process Modeling, Advanced Control and Data Analytics for Optimizing Polyolefin Manufacturing 2V Set idegen
idegen
Liu, Y. A. - Sharma, Niket

Integrated Process Modeling, Advanced Control and Data Analytics for Optimizing Polyolefin Manufacturing 2V Set - 2 volumes

Wiley-VCH, 2023

Integrated Process Modeling, Advanced Control and Data Analytics for Optimizing Polyolefin Manufacturing Detailed resource on the "Why," ...

Online ár:

120 486 Ft

Eredeti ár: 126 827 Ft

Biodegradable Polymers in the Circular Plastics Economy idegen
idegen

Biodegradable Polymers in the Circular Plastics Economy

Wiley-VCH GmbH, 2022

This comprehensive approach encompasses all aspects from renewable resources, over synthesis, with marketing and policy issues, to degrad...

Online ár:

66 285 Ft

Eredeti ár: 69 773 Ft

Welford, T.: The Textiles Student's Manual - An Outline of All Textile Processes, From the Origin of the Fibre to the Finished Cloth idegen
idegen
Welford, T.

The Textiles Student's Manual - An Outline of All Textile Processes, From the Origin of the Fibre to the Finished Cloth

Maine Press, 2011

First published in 1926, "Weaving Patterns of Yesterday and Today" is a comprehensive handbook on the textile industry, dealing with ever...

Online ár:

15 396 Ft

Eredeti ár: 16 206 Ft

Bruice, Paula Yurkanis: Organic Chemistry, Global Edition idegen
idegen
Bruice, Paula Yurkanis

Organic Chemistry, Global Edition

Pearson Education Limited, 2016

For courses in Organic Chemistry (2-Semester) A framework for organic chemistry built around the similarities in reaction types Paula Bru...

Online ár:

42 470 Ft

Eredeti ár: 44 705 Ft

Reetz, Manfred T. - Sun, Zhoutong - Qu, Ge: Enzyme Engineering idegen
idegen
Reetz, Manfred T. - Sun, Zhoutong - Qu, Ge

Enzyme Engineering - Selective Catalysts for Applications in Biotechnology, Organic Chemistry, and Life Science

Wiley-VCH GmbH, 2023

Written by one of the pioneers, this book presents enzyme engineering and its applications at its best. Beside established topics like en...

Online ár:

66 252 Ft

Eredeti ár: 69 738 Ft

Modern Cyclophane Chemistry idegen
idegen

Modern Cyclophane Chemistry

Wiley-VCH GmbH, 2004

Endlich ein Werk, das den gegenwärtigen Forschungsstand der Cyclophanchemie widerspiegelt! Jeder, der mit Cyclophanen arbeitet, wird von ...

Online ár:

99 522 Ft

Eredeti ár: 104 760 Ft

Vogel, Pierre - Houk, Kendall N.: Organic Chemistry idegen
idegen
Vogel, Pierre - Houk, Kendall N.

Organic Chemistry - Theory, Reactivity and Mechanisms in Modern Synthesis

Wiley-VCH GmbH, 2019

Das erfolgreiche Arbeiten mit organischen Reaktionen erfordert Wissen über Reaktivität, Reaktionsmechanismen, Thermodynamik und weitere G...

Online ár:

52 626 Ft

Eredeti ár: 55 395 Ft

Qin, Yimin: Alginate Fibers and Wound Dressings idegen
idegen
Qin, Yimin

Alginate Fibers and Wound Dressings - Seaweed Derived Natural Therapy

Wiley-VCH, 2023

Offers a systematic summary of the many aspects of alginate fibers and wound dressings.

Online ár:

57 886 Ft

Eredeti ár: 60 932 Ft

Progress in the Science of Functional Dyes idegen
idegen

Progress in the Science of Functional Dyes

Springer Singapore, 2022

This book covers a wide range of topics related to functional dyes, from synthesis and functionality to application. Making a survey of r...

Online ár:

80 206 Ft

Eredeti ár: 84 427 Ft

Progress in the Chemistry of Organic Natural Products 113 idegen
idegen

Progress in the Chemistry of Organic Natural Products 113

Springer International Publishing AG, 2020

In this book, chemical studies are described mainly from literature reports appearing since 2000, inclusive of investigations performed b...

Online ár:

146 848 Ft

Eredeti ár: 154 576 Ft

Nickel Catalysis in Organic Synthesis idegen
idegen

Nickel Catalysis in Organic Synthesis - Methods and Reactions

Wiley-VCH, 2020

A comprehensive reference to nickel chemistry for every scientist working with organometallic catalysts Written by one of the world?s lea...

Online ár:

62 075 Ft

Eredeti ár: 65 342 Ft

Redox-Active Ligands idegen
idegen

Redox-Active Ligands - Concepts and Catalysis

Wiley-VCH GmbH, 2024

This unique book describes redox-active ligand design and the application of 3d and noble transition metal complexes, main group elements...

Online ár:

62 079 Ft

Eredeti ár: 65 346 Ft

Donor-Acceptor Cyclopropanes in Organic Synthesis idegen
idegen

Donor-Acceptor Cyclopropanes in Organic Synthesis

Wiley-VCH GmbH, 2024

Doner-Acceptor Cyclopropanes (DACs) play an essential role in organic reactions and belong to the toolbox of synthetic chemistry. This bo...

Online ár:

62 117 Ft

Eredeti ár: 65 386 Ft

DNA Nanotechnology for Cell Research idegen
idegen

DNA Nanotechnology for Cell Research - From Bioanalysis to Biomedicine

Wiley-VCH GmbH, 2024

A comprehensive and unique reference that focuses on the fundamental cell science and biomedical applications of DNA nanotechnology.

Online ár:

78 770 Ft

Eredeti ár: 82 915 Ft

Árinfó

Akciós ár: a vásárláskor fizetendő akciós ár

Online ár: az internetes rendelésekre érvényes nem akciós ár

Eredeti ár: kedvezmény nélküli könyvesbolti ár

Bevezető ár: az első megjelenéshez kapcsolódó kedvezményes ár

Korábbi ár: az akciót megelőző 30 nap legalacsonyabb akciós ára

További információk

Árinfó

Akciós ár: a vásárláskor fizetendő akciós ár

Online ár: az internetes rendelésekre érvényes nem akciós ár

Eredeti ár: kedvezmény nélküli könyvesbolti ár

Bevezető ár: az első megjelenéshez kapcsolódó kedvezményes ár

Korábbi ár: az akciót megelőző 30 nap legalacsonyabb akciós ára