Polymer chemistry
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Polymer and its Environmental aspects discusses polymers, their origins, types, and applications. Polymers are large molecules composed of many repeating structural units. They are classified based on their structure and mode of polymerization, and are synthesized through processes like addition polymerization of unsaturated monomers. Common polymers include polyethylene, polyvinyl chloride, and polypropylene. Polymers have a wide variety of applications in everyday life, industries, agriculture, and pharmaceuticals.
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The document provides an overview of organic chemistry concepts including:
1. The main classes of organic compounds are hydrocarbons, alcohols, ethers, aldehydes, ketones, carboxylic acids, esters, amines, and aromatic compounds.
2. Hydrocarbons are divided into alkanes, alkenes and alkynes based on the presence of single, double or triple carbon bonds. Nomenclature provides the naming structure for different compounds.
3. Functional groups determine the properties and reactivity of organic molecules. Common reactions include combustion, substitution, and addition. Isomers have the same molecular formula but different structural formulas.
Chapters 24,25
The document discusses organic chemistry topics including:
- Classes of organic compounds such as aliphatic hydrocarbons, aromatic hydrocarbons, and functional groups.
- Alkanes have the general formula CnH2n+2 and contain only single bonds. Cycloalkanes contain carbon atoms joined in rings.
- Alkenes contain carbon-carbon double bonds and have the general formula CnH2n. Alkynes contain carbon-carbon triple bonds and have the formula CnH2n-2.
- Aromatic compounds contain benzene rings, and their naming involves indicating substituted groups on the ring.
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It's based on the first part of this research paper:
The cost of information acquisition by natural selection
Ryan Seamus McGee, Olivia Kosterlitz, Artem Kaznatcheev, Benjamin Kerr, Carl T. Bergstrom
bioRxiv 2022.07.02.498577; doi: https://doi.org/10.1101/2022.07.02.498577
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Storagedeteriorationisanyformoflossinquantityandqualityofbio-materials.
Themajorcausesofdeteriorationinstorage
•Physical
•Biological
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•Chemical
Storageonlypreservesquality.Itneverimprovesquality.
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在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样
学校原件一模一样【微信：741003700 】《(salfor毕业证书)索尔福德大学毕业证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
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◇企事业单位必须要求办理的
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◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
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6:个人职称评审加20分
7:个人信誉贷款加10分
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In this presentation include the prototype drug SAR on thus or with their examples .
Syllabus of Second Year B. Pharmacy
2019 PATTERN.
20240520 Planning a Circuit Simulator in JavaScript.pptx
Evaporation step counter work. I have done a physical experiment.
(Work in progress.)
Sharlene Leurig - Enabling Onsite Water Use with Net Zero Water
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Presented at June 6-7 Texas Alliance of Groundwater Districts Business MeetingPests of Storage_Identification_Dr.UPR.pdf
InIndia-post-harvestlosses-unscientificstorage,insects,rodents,micro-organismsetc.,accountforabout10percentoftotalfoodgrains
Graininfestation
Directdamage
Indirectly
•theexuviae,skin,deadinsects
•theirexcretawhichmakefoodunfitforhumanconsumption
About600speciesofinsectshavebeenassociatedwithstoredgrainproducts
100speciesofinsectpestsofstoredproductscauseeconomiclosses
Katherine Romanak - Geologic CO2 Storage.pdf
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EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
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aziz sancar nobel prize winner: from mardin to nobel
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EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
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Polymer chemistry
- 1. Polymer and its Environmental aspects Presented By:- Rakesh Patle Asst.Professor Govt.P.G. college Balaghat
- 2. Introduction What is a polymer? Its Origin & source Poly mer many repeat unit Adapted from Fig. 14.2, Callister 7e. C C C C C C HHHHHH HHHHHH Polyethylene (PE) ClCl Cl C C C C C C HHH HHHHHH Polyvinyl chloride (PVC) HH HHH H Polypropylene (PP) C C C C C C CH3 HH CH3CH3H repeat unit repeat unit repeat unit
- 3. Types and Classification BASED ON STRUCTURE BASED ON MODE OF POLYMERISATION TYPES : * Addition polymers * Co-polymers * Condensation Polymers
- 4. Synthesis of polymers Saturated hydrocarbons Each carbon bonded to four other atoms CnH2n+2 C C H H H H H H
- 6. Unsaturated Hydrocarbons Double & triple bonds relatively reactive – can form ne w bonds Double bond – ethylene or ethene - CnH2n 4-bonds, but only 3 atoms bound to C’s C C H H H H
- 7. Isomerism Isomerism two compounds with same chemical formula can hav e quite different structures/atomic arrangement Ex: C8H18 n-octane 2-methyl-4-ethyl pentane (isooctane) CCCCCCCCH H H H H H H H H H H H H H H H H HH3CCH2CH2CH2CH2CH2CH2CH3= H3C CH CH3 CH2 CH CH2 CH3 CH3 H3CCH2CH3( ) 6
- 8. Chemistry of Polymers Adapted from Fig. 1 4.1, Callister 7e. Note: polyethylene is just a long HC - paraffin is short polyethylene
- 9. Bulk or Commodity Polymers
- 13. Types of Polymerization Chain-growth polymers, also known as ad dition polymers, are made by chain reactio ns
- 14. Applications In Everyday Life In Industries In Agriculcutre In Pharmaceuticals
- 15. THANKS