A review of the photodegradation and light stabilization of polypropylene with an emphasis on thick section applications. Presented at the SPE International Polyolefins Conference, Houston, TX, February 2007.
Introduction to waterborne paints & coatings rheologyspecialchem-ada
To get additional information, you can use the following link: goo.gl/dxR59V
In this presentation, the technical expert explains how Rheology influences in-can properties, paint texture, application properties & film properties.
You will find some product recommendations: the right dispersants and thickeners (Acrylic, HEUR) to be used in various formulation types to improve coating properties.
If you would like to get more detailed information on Rheology, click on the following link: goo.gl/dxR59V
Functional barrier films in flexible packaging industryHenky Wibawa
Technology and market trends in flexible packaging development. Presented in Asia Flexible Packaging Summit 2016, 13-14 January, 2016 Crowne Plaza Century Park Shanghai
slides contain some information about polycarbonate, as follow:
- History
- What is PC?
- Structure
- Production
- Processing
- Manufacturing & Block diagram
- Properties
- Applications
Technical Approaches to Improving the Scratch Resistance of TPO. Part I: Su...Jim Botkin
A review of the effects of additive systems based on surface lubricants in enhancing the scratch resistance of TPO, with an emphasis on automotive applications. Presented at the SPE Automotive TPO Global Conference, October 2007.
The Stabilization of Polypropylene and TPO: An OverviewJim Botkin
A comprehensive review of the degradation and stabilization of polypropylene and TPO, with a focus on automotive applications. Presented at the SPE Automotive TPO Engineered Polyolefins Global Conference, October 2012.
The paper presents an overview of nucleating agents and their effects on crystallization rate, mechanical properties, and thermal properties in polypropylene. Presented at the SPE Automotive TPO Engineered Polyolefins Global Conference, October 2002, while working at Ciba Specialty Chemicals.
Introduction to waterborne paints & coatings rheologyspecialchem-ada
To get additional information, you can use the following link: goo.gl/dxR59V
In this presentation, the technical expert explains how Rheology influences in-can properties, paint texture, application properties & film properties.
You will find some product recommendations: the right dispersants and thickeners (Acrylic, HEUR) to be used in various formulation types to improve coating properties.
If you would like to get more detailed information on Rheology, click on the following link: goo.gl/dxR59V
Functional barrier films in flexible packaging industryHenky Wibawa
Technology and market trends in flexible packaging development. Presented in Asia Flexible Packaging Summit 2016, 13-14 January, 2016 Crowne Plaza Century Park Shanghai
slides contain some information about polycarbonate, as follow:
- History
- What is PC?
- Structure
- Production
- Processing
- Manufacturing & Block diagram
- Properties
- Applications
Technical Approaches to Improving the Scratch Resistance of TPO. Part I: Su...Jim Botkin
A review of the effects of additive systems based on surface lubricants in enhancing the scratch resistance of TPO, with an emphasis on automotive applications. Presented at the SPE Automotive TPO Global Conference, October 2007.
The Stabilization of Polypropylene and TPO: An OverviewJim Botkin
A comprehensive review of the degradation and stabilization of polypropylene and TPO, with a focus on automotive applications. Presented at the SPE Automotive TPO Engineered Polyolefins Global Conference, October 2012.
The paper presents an overview of nucleating agents and their effects on crystallization rate, mechanical properties, and thermal properties in polypropylene. Presented at the SPE Automotive TPO Engineered Polyolefins Global Conference, October 2002, while working at Ciba Specialty Chemicals.
Form & Structure: The Effects of Polybutadiene TPU with Polypropylene Total Cray Valley
Poly bd® & Krasol® are two lines of unique polybutadienes from Cray Valley, a specialty chemical provider of raw materials and additives for adhesives, rubber and polymers. Poly bd® & Krasol® resins are low molecular weight, hydroxyl-terminated homopolymers of butadiene. This presentation explores the form and structure of polybutadiene TPUs with polypropylene. When reacted with curing agents such as di- and polyisocyanates, both Poly bd® & Krasol® provide formulators with an attractive route to preparing general-purpose polyurethane elastomers. These resins are used in several industries including construction, automotive, electronics and rubber, in applications for castable elastomers, caulks, sealants, foams, adhesives, coatings, binders for composites and other rubber fabricated materials.
High-barrier packaging can significantly reduce absorption, desorption and diffusion of gases and liquids to maintain the quality of food. This paper provides technical information on the barrier properties of a new solution based on a passive non-nanosized technology for its use in polyolefin materials. This is interestingly presented as a novel alternative to other new commercial passive fillers such as unmodified or organically modified nanoclays. In particular, the new additive offered better barrier performance during sterilization conditions, in which the water vapor permeability was reduced to about 60% when compared to the unfilled polypropylene film.
Ferro, a leading supplier of specialty plastics, has recently developed OPTUM® Barrier masterbatch for a wide range of polymers. This can be incorporated by melt processing in most of the manufacturing processes involved in the developing of single and multi-layer structures in flexible and rigid packaging. In particular this is suitable for food packaging applications in order to increase product protection and shelf-life. Barrier applications can be found, however, in other market segments such as cosmetics, industrial containers and agricultural films, where barrier to oxygen and other gases is also critical.
GreenScreen® Hazard Assessment of Bumetrizole (UV-326, CAS No. 3896-11-5) produced to help guide informed decision-making in the replacement of certain phenolic benzotriazole UV absorbers identified as chemicals of concern (including UV-320, UV-327, UV-328, and UV-350) with safer alternatives. Bumetrizole (UV-326) was assessed against GreenScreen® version 1.2 criteria in the GreenScreen® 2015 Practitioner Program.
Learn more about the effects of sunlight on plastics, test methods for assessing light stability, and the correlation between natural and accelerated weathering.
Welcome to International Journal of Engineering Research and Development (IJERD)IJERD Editor
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Investigation of spatial configuration of Polypropylene and the influence of ...IOSR Journals
Abstract: Polypropylene is considered as one of the most important plastic types because of its substantial
supreme properties such as high melting temperature, good chemical resistance and desirable mechanical
properties, and achieving desired properties of Polypropylene is a significant activity, besides, gaining this
properties is the most important economical factor in reactor polymerization which gives a considerable curve
for performance cost polypropylene. In this paper, polypropylene properties, finding physical factor_ the form,
and other factors such as molecular weight _ the type of used catalyst and molecular mass which would be
expanded to properties of final polypropylene application, are all described. The state of mechanical changes
_thermal and photic changes of polymer which are closely dependant to foresaid factors_ is also discussed in
present paper, and this indicates the path toward achieving desired quality. Keyword: Polypropylene ¸ Stereo specificity Stereochemistry ،Ziegler-Natta catalysts، Atacticity
A graphene/hemin hybrid material as an efficient green catalyst for stereosel...Pawan Kumar
A hemin/graphene composite, prepared by mixing an aqueous solution of graphene oxide (GO) with hemin
and sonicating the suspension for 5 h at room temperature, was investigated for olefination of aldehydes
using ethyl diazoacetate in the presence of triphenylphosphine. Efficient olefination of aromatic
aldehydes with high (E)-selectivity was obtained, revealing that rGO/hemin is a promising heterogeneous
catalyst for the olefination reaction. The as-synthesized catalyst could easily be recovered from the
reaction mixture and was subsequently used for several runs without any significantly loss in activity and
selectivity.
Organic inorganic hybrid cobalt phthalocyanine/polyaniline as efficient catal...Pawan Kumar
Organic inorganic hybrid catalyst synthesized by doping of cobalt phthalocyanine (CoPc) on
polyaniline support (CoPc/PANI) exhibited higher activity for the oxidation of various alcohols
to the corresponding carbonyl compounds in high to excellent yield using molecular oxygen as
oxidant and isobutyraldehyde as a sacrificial agent. Notably, the synthesized catalyst was found
to be truly heterogeneous in nature and could be easily recovered, recycled for several recycling
runs without loss of catalytic activity
Synthesis, Characterization and Flocculation Characteristics of Polysaccharid...CrimsonPublishersRDMS
Synthesis, Characterization and Flocculation Characteristics of Polysaccharide Graft Copolymers by Karmakar GP in Research & Development in Material Science
Degradation of Low Density Polyethylene Due To Successive Exposure to Acid Ra...Editor IJCATR
Utilization of polymer products for outdoor applications is continuously increasing. So the stability of polymers against
environmental degradation became top of interests for many researchers. The effect of environmental elements on the polymers stability
has been studied, but individually. A solution against an environmental element may conflict with a solution against other element.
Therefore current study aimed to clarify a sort of these conflicts, by successive exposure of low density polyethylene (LDPE) films to
acid rains and ultra violet (UV) radiation for different times. The used LDPE films are selected from the commercial grads which are
used for plants greenhouses, in order to use samples fully protected against environmental elements. It is found that acid rains etch PE
films, causing removal for some of the UV stabilizer additives, and hence UV radiation could attack PE films seriously causing remarked
oxidative degradation. This study includes wide comparisons between effects of acid rain only, UV irradiation only, acid rain followed
by UV irradiation and UV irradiation followed by acid rain exposure. Variations in the chemical composition, morphological structures,
thermal and mechanical properties are detected by the IR- spectroscopy, X-ray diffraction, differential thermal analysis (DTA) and
tensile tests. A new view for the differentiation between degradations caused by acid rains and UV radiation is discussed. Lot of
experimental data are given in many coloured graphs and tables
Hindered amine stabilizes
A B3LYP, HF, AM1 and PM2 computational studies of the reaction of hindered amine (HALS) has been perfumed. Four different theories were used to calculate the bond dissociation energy (BDE). In two molecules studied the nitrogen were protonated and not protonated. BDE were calculated when aromatic rings were substituted with NO2 and OCH3. B3LYP was the best theoretical calculation level, The BDE was grater when nitrogen in HALS was protonated. There was no big significant difference in BDE when aromatic ring of hindered amine was substituted with NO2 and OCH3.
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
(May 29th, 2024) Advancements in Intravital Microscopy- Insights for Preclini...Scintica Instrumentation
Intravital microscopy (IVM) is a powerful tool utilized to study cellular behavior over time and space in vivo. Much of our understanding of cell biology has been accomplished using various in vitro and ex vivo methods; however, these studies do not necessarily reflect the natural dynamics of biological processes. Unlike traditional cell culture or fixed tissue imaging, IVM allows for the ultra-fast high-resolution imaging of cellular processes over time and space and were studied in its natural environment. Real-time visualization of biological processes in the context of an intact organism helps maintain physiological relevance and provide insights into the progression of disease, response to treatments or developmental processes.
In this webinar we give an overview of advanced applications of the IVM system in preclinical research. IVIM technology is a provider of all-in-one intravital microscopy systems and solutions optimized for in vivo imaging of live animal models at sub-micron resolution. The system’s unique features and user-friendly software enables researchers to probe fast dynamic biological processes such as immune cell tracking, cell-cell interaction as well as vascularization and tumor metastasis with exceptional detail. This webinar will also give an overview of IVM being utilized in drug development, offering a view into the intricate interaction between drugs/nanoparticles and tissues in vivo and allows for the evaluation of therapeutic intervention in a variety of tissues and organs. This interdisciplinary collaboration continues to drive the advancements of novel therapeutic strategies.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
Cancer cell metabolism: special Reference to Lactate PathwayAADYARAJPANDEY1
Normal Cell Metabolism:
Cellular respiration describes the series of steps that cells use to break down sugar and other chemicals to get the energy we need to function.
Energy is stored in the bonds of glucose and when glucose is broken down, much of that energy is released.
Cell utilize energy in the form of ATP.
The first step of respiration is called glycolysis. In a series of steps, glycolysis breaks glucose into two smaller molecules - a chemical called pyruvate. A small amount of ATP is formed during this process.
Most healthy cells continue the breakdown in a second process, called the Kreb's cycle. The Kreb's cycle allows cells to “burn” the pyruvates made in glycolysis to get more ATP.
The last step in the breakdown of glucose is called oxidative phosphorylation (Ox-Phos).
It takes place in specialized cell structures called mitochondria. This process produces a large amount of ATP. Importantly, cells need oxygen to complete oxidative phosphorylation.
If a cell completes only glycolysis, only 2 molecules of ATP are made per glucose. However, if the cell completes the entire respiration process (glycolysis - Kreb's - oxidative phosphorylation), about 36 molecules of ATP are created, giving it much more energy to use.
IN CANCER CELL:
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
introduction to WARBERG PHENOMENA:
WARBURG EFFECT Usually, cancer cells are highly glycolytic (glucose addiction) and take up more glucose than do normal cells from outside.
Otto Heinrich Warburg (; 8 October 1883 – 1 August 1970) In 1931 was awarded the Nobel Prize in Physiology for his "discovery of the nature and mode of action of the respiratory enzyme.
WARNBURG EFFECT : cancer cells under aerobic (well-oxygenated) conditions to metabolize glucose to lactate (aerobic glycolysis) is known as the Warburg effect. Warburg made the observation that tumor slices consume glucose and secrete lactate at a higher rate than normal tissues.
Comparing Evolved Extractive Text Summary Scores of Bidirectional Encoder Rep...University of Maribor
Slides from:
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Track: Artificial Intelligence
https://www.etran.rs/2024/en/home-english/
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.