Live webinar

Gel permeation chromatography (GPC) also known as size exclusion chromatography (SEC), is a very popular analytical tool for characterizing synthetic and natural polymers.

This webinar, first in a series of masterclass presentations, is designed to give a basic introduction to theory behind making particle characterization measurements using imaging based techniques.

Malvern and NETZSCH Grinding & Dispersion are now working together in the field of grinding, dispersion and particle characterization. In our short webinar, learn how grinding and dispersion can be more efficient by using particle characterization techniques. We will describe the cooperation, introduce some of the technologies and take a look at some case studies.

Malvern and NETZSCH Grinding & Dispersion are now working together in the field of grinding, dispersion and particle characterization. In our short webinar, learn how grinding and dispersion can be more efficient by using particle characterization techniques. We will describe the cooperation, introduce some of the technologies and take a look at some case studies.

【はじめての粒子形状測定】
対象：粒子径測定を初めて関わる方～粒子径測定について改めて見直したい方
該当製品：粒子形状測定装置
内容：粒子は様々な形状をしていることは知られています。
その形状のパラメーターは、粉体の流動性などに大きな影響を及ぼすことが知られています。
しかし、これまで粒子形状は評価が難しいパラメーターの１つでした。
このプレゼンでは、粒子形状をあらわすパラメーターについてご説明いたします。
新たに粒子形状測定に関わる方から改めて粒子形状測定について見直したい方まで参加いただけるウェブセミナーです。

The most widely used geometries for making rheological measures with rotational rheometers are parallel-plate [PP] and cone and plate[CP]. Deciding which geometry to use usually depends upon the sample and accuracy of measurement.

Measuring samples with dynamic or electrophoretic light scattering on the Zetasizer Nano? Remember that warm, fuzzy feeling you get when the “results quality parameter” is “Good”? This presentation is not about that… Instead, it is about the “What happened here?” puzzled look when you see a red warning that tells you to “Refer to quality report”. It is about measuring the not so perfect sample and getting the not so perfect result, and then finding ways to improve them. Maybe not to perfection, but close!

The instrumentation used to characterize particles by imaging techniques can be broadly categorized into either static or dynamic based systems. In this presentation we discuss the differences between the two types of instrumentation, and their relative merits or limitations.

【レオロジーの基礎１】
いろんなレオロジー測定法～レオロジーの達人への道～
対象：これからレオロジーをはじめる方や社内でレオロジーを広めたい方
所要時間-３０分
サンプルの状態、流動特性、工程、現象や測定範囲などに応じて、いろんなレオロジー測定法があります。なぜレオロジー測定が必要なのか、また、これらの測定法の典型的な使い分けについて説明します。

In this presentation we will deal with the application of ultrasound energy frequently used to 'disperse' powdered samples in suspension. We will deal with the difficulties of specifying the absolute energy input in such systems (if a dispersed size is a measurement objective)and the requirement, therefore, to specify 'sonication to stability' as the effective mantra rather than a specified power for a set time duration. In this journey we will take in Reynold's Numbers, Lord Stokes, and the singing kettle.

【はじめての測定前処理】
対象：粒子径測定を初めて関わる方～粒子径測定について改めて見直したい方
該当製品：粒子計測装置
内容：粒子径や形状測定に不可欠なのは、試料の前処理です。
前処理がうまくいかないと、結果が大きく変わります。
前処理のコツに関して実例をあげて説明します。
新たに粉体測定に関わる方から改めて測定について見直したい方まで参加いただけるウェブセミナーです。

En este webminar cubriremos los principios basicos de reologia y los elementos que conformarn un reometro asi como las diferencias entre un reometro y un viscosimetro.

The two main purposes of tests conducted on grease are to insure uniformity in the produce and to enable the prediction of lubricant performance. Grease is a rheological complex viscoelastic material formulated to meet a wide range of requirements. Tests normally performed by the grease industry are single point quality control tests, such as cone penetration, and dropping point. The wide range of temperatures and shear rates greases are subjected to make it act as a solid and a shear rate dependent fluid. Therefore, better test are needed to identify compositional and structural variations and possibly predict performance. This Web Seminar describes some of these test methods using rotational rheometers that pertain to more complete and accurate rheological characterization of lubricating greases.

The latest version of ISO13320 recommends that users of laser diffraction systems should know the optical properties of their materials before deciding which optical model to use when calculating particle size distributions.

【レオロジーの基礎2】
粘度計とレオメーターの違い～レオロジーの達人への道～
対象：これからレオロジーをはじめる方や社内でレオロジーを広めたい方
所要時間-３０分
多くの材料は、非ニュートン性（粘度が１つの値で表せない）を示します。測定には、粘度計やレオメーターが用いられます。両者の違いや活用方法、測定から得られる情報について、身近な例を用いながら説明します。

Normally we do not think about the color and optical properties of metals (except perhaps for copper and gold). The color of colloidal gold sols was the basis for Gustav Mie's famous theory in 1908.

El objetivo de esta presentación será proporcionar un enfoque sistemático para el desarrollo de métodos optimizados para mediciones de difracción laser. Se describirá cómo se pueden hacer mediciones reproducibles y robustas siguiendo la orientación proporcionada en ISO13320.

This will provide an introduction to the principles of froth flotation and the importance of zeta potential.

This Web Seminar describes how rheology can be used to measure the thermodynamics of mixing of polymer solutions. In most solutions intermolecular interactions are different between like and unlike molecules, and the mixing process leads to an absorption or evolution of heat. Flory developed a theory in which the expansion of the chain is characterized by an expansion coefficient. The dependence of the change in hydrodynamic volume of solutes is related to the interaction parameter. Based on Le Chatelier’s Principle the temperature dependence of the hydrodynamic volume of the solute will determine if the heat of mixing is exothermal, endothermal or athermal. Test results of Polyacrylonitrile in electrolytic solvents will be presented.

【レオロジーの基礎3】
粘弾性測定（基礎コース）～レオロジーの達人への道～
対象：これからレオロジーをはじめる方や社内でレオロジーを広めたい方
所要時間-３０分
同じ材料であっても、観測する時間もしくは温度によって、異なる性質を示します。この性質を把握するには粘弾性測定が便利です。測定モードや解釈法について、身近な例を用いながら説明します。

Despite our best efforts to produce a robust method for sample measurement when using laser diffraction, things can go wrong! Given this, it is often asked how users reviewing data can determine if a measurement has been carried out correctly. In this presentation, we will cover the most common errors which can occurring during laser diffraction measurements. If you have any specific issues you would like us to cover, please email us with your before the presentation date.

Escolher a técnica adequada para a caracterização de partículas em seu produto pode parecer difícil. Nesta apresentação vamos simplificar y desmistificar esse processo, mostrando as vantagens e limitações de várias técnicas.

Tempting as it might sound to take just one measurement of your sample and run with it, most times is not enough. Why?

In this overview presentation, we will review and explore the importance of particle size distribution in the production of resilient and robust ceramic materials. We will see how the production of a small grain-sized material provides production challenges and how zeta potential and rheological measurements can assist the ceramics formulator.

En este Webminar cubriremos no cuando el reporte del Zetasizer aparece como "GOOD" si no que podemos hacer cuando el reporte dice "Refer to Quality Report"

BIomoleculas como péptidos o biopolímeros pueden ser caracterizadas usando técnicas de dispersión de luz para determinar su tamaño hidrodinámico y peso molecular.

The secret to success for any particle characterization method is choosing the appropriate sample preparation and sample measurement conditions. In this webinar we will discuss what constitutes good experimental practice for imaging experiments in order to achieve the best quality results and value from the technique.

Following on from the successful webinars on the optical properties of TiO2 and CaCO3, we will now tackle the optical properties of silica, SiO2.

Preparation of a sample for GPC and SEC analysis is considered the most fundamental stage of analysis.

Robert Richards was a Professor of Mining at MIT and lived for over 100 years. He provided early sampling theories based on earlier contributions by Vezin, Reed, and Brunton. We will explore his controversial modification of these theories and also talk about his first wife, Ellen Swallow Richards, for whom more recognition is finally coming about via the ACS, and who should be far better known for her many scientific and pioneering works.

Mean, standard deviation, relative standard deviation, key size parameters, specifications, repeatability, reproducibility, ISO standards...what is all this and why do I care?

Sylvanus Albert Reed (S A Reed) developed early sampling theories in 1882 and 1884 while at the Columbia School of Mines. However, he also wrote the classic book on the San Francisco Fire of 1906 while an insurance agent and went on to make his fortune by developing the metal propeller for aeroplanes. We will look at the life of this fascinating individual focusing on his contributions to early sampling theories.