Bettersizer 2600は、乾式・湿式分散両方対応可能で、圧倒的なコストパフォーマンスと精確性・再現性を兼ね備えたレーザー回折・散乱法の粒子径分布測定装置です。多様なニーズに対応できるようにモジュール設計を採用し、特許取得済みのフーリエおよび逆フーリエ光学システムの採用により0.02 μmから2600 μmまでの幅広い粒子を一台で正確に測定することができます。
機能と利点
- ● 湿式分散：0.02～2,600μm 乾式分散：0.1～2,600μm
- ● 有機溶媒対応分散器 BT-80N・BT-80N Pro （オプション）
- ● 極微量試料用分散器 BT-804（湿式微量・オプション）とBT-903（乾式微量・オプション）
- ● フーリエ・逆フーリエ光学システムと斜めのセル設計により、0.02μmまでの超微粒子を測定可能
- ● 検出器92個を搭載し、0.016°～165°の非常に広い角度の散乱光を検出
- ● 多様なニーズに対応できるモジュール設計、モジュール間の切替えが容易
- ● 標準作業手順SOPによる測定が可能
- ● 屈折率測定可能
- ● 使いやすいソフトウェア
ビデオ
Bettersizer 2600 | Laser Diffraction Particle Size Analyzer (Wet & Dry) 
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Bettersizer 2600 Overview | Laser Diffraction Particle Size Analyzer (Dry & Wet Dispersions)
概要
レーザー回折・散乱式粒子径分布測定装置Bettersizer2600は、サブミクロンからミリメートル粒子までの幅広い粒子を正確に測定します。革新的な光学システムを採用しており、標準操作手順書(SOP)に準じて測定を行うことができます。乾式及び湿式のサンプルを誰でも簡単に再現性良く高精度に測定することができます。バランスの取れた設計で、メンテナス頻度の低減と、運用コストの削減に寄与します。
特徴1. フーリエおよび逆フーリエ光学システムによる幅広い測定範囲
Bettersizer2600は、革新的な光学ベンチ設計を採用しています。照射されたレーザーはレンズを通してサンプルに充てられ、粒子によって散乱されます。散乱された光は前方および横方向の両方で検出されます(逆フーリエ構造)。従来のレーザー回折装置とは対照的に後方散乱光も後方の検出器で測定されます。サンプルキュベットは入射レーザー光に対して35°の角度で配置されます。
このような斬新な構造設計により、一方では、0.016°～165°の非常に広い角度の散乱光を検出し（大きい粒子による散乱光）、もう一方で、後方散乱光（小さい粒子による散乱光）を検出することによって、小さい粒子から大きい粒子までを同時且つ正確に測定することができます。
特許取得済みのフーリエ・逆フーリエ光学システム
特徴2. 直感的でパワフルなソフトウェア
- 簡便な操作と明瞭で直感的なインターフェース
- リアルタイムモードによる最適な測定条件の決定
- SOP（標準操作手順書）による測定
- 自動校正による完全自動測定
- 自動データバックアップと編集可能なレポート
- 粒子径と粒子の種類に応じてFraunhofer回折理論またはMie散乱理論を適切に使用し、高精度分析が可能
- 自動洗浄
- ボタンを押すだけで湿式サンプル測定から乾式サンプル測定へ簡単に変更可能
特徴3. 湿式(Wet)分散モジュール
ISO13320に準拠したレーザー回折法
湿式サンプル測定では、分散媒の選択、界面活性剤の使用、超音波分散器によって粒子を適切に分散させて測定する必要があります。
- BT-802は超音波分散器とサンプル循環のための遠心ポンプを備えた全自動標準分散モジュールです。全容積は600mlで、分散媒として蒸留水やアルコール類を使用することができます。
- BT-80Nは、BT-802より容積が小さい(約250ml)分散モジュールで、分散媒としてヘプタン、トルエン、オイルなどの非極性溶媒を使用することが可能です。
特徴4. 乾式(Dry)分散モジュール
乾式サンプル分散は、溶媒を使用せずに乾燥粉末または粉粒体を測定する場合に使用します。サンプルは振動フィードによって測定前に分散され、チャンネル内に落下します。そして圧縮空気(ベンチュリノズル)によって水平測定セルに運ばれます。その過程で粒子は容器の壁への衝突、空気の流れのせん断力、粒子同士の衝突によって分散されます。
分散モジュールはハンドルを使用して簡単に取り外すことができ、他の分散モジュールへの切り替えも簡単に行うことが可能です。
- BT-902は粒子の性質によって粒子の移送速度、分散圧力（～5bar）が調整できる乾式全自動標準分散モジュールです。凝集性の粉体、流動性の良い粉体両方に適した分散モジュールです。
- BT-903はBT-902より少ないサンプル量（20mg～1g）を分散させ、粒子径を測定るのに使用します。研究開発、医薬品等希少で、貴重なサンプルの測定に適しています。
特徴5. 幅広いアプリケーション
医薬品、食品・飲料、塗料、オイル、電池など、幅広い用途の測定が可能です。
Citations
- Bettersizer 2600
Functional redundancy as an indicator for evaluating functional diversity of macrobenthos under the mussel raft farm near Gouqi Island
DOI: 10.1016/j.aquaculture.2023.740024 Read Article
Zhejiang Ocean University | 2024Biological traits analysis (BTA) helps to evaluate the effects of different environmental variables on the traits-based functional composition of macrobenthos. However, research on functional traits of macrobenthos under mussel farming is limited. We investigated the spatial and temporal response of the benthic system in terms of taxonomic and functional diversity to environmental variables of farming and natural stressors resulting from suspended mussel farming near Gouqi Island of eastern China Sea. The functional traits of macrobenthic assemblages under mussel farming were characterized by “medium adult body size”, “vermiform body form”, “high flexibility”, “infauna”, “semi-motile”, “gonochoristic”, “surface deposit-feeders”, “carnivores”, “semi-motile burrowers”, and “tube-dwellers”. Functional redundancy was stable in response to mussel farming stresses among seasons, whereas species diversity showed efficient to evaluate natural variables. Functional diversity was significantly affected by farming stressors rather than natural variables, Further analysis using multivariate methods together with continuous monitoring were highlighted to evaluate the impacts of mussel farming. Our results reinforce the importance of macrobenthic species and functional traits analysis to evaluate human stresses driven impacts in offshore ecosystems. By analysing the environmental variables with different sources, independently, we concluded the main effects of human pressures on macrobenthic community. Such distinction could be particularly effective to isolate variable environmental descriptors and evaluate their effects on functional diversity, making the current approach promising for the evaluation of ecological effects of anthropogenic stressors in aquaculture areas. - Bettersizer 2600
Degradation characteristics and utilization strategies of a covalent bonded resin-based solid amine during capturing CO2 from flue gas
DOI: 10.1016/j.seppur.2023.125621 Read ArticleChina University of Petroleum | 2024In this study, various types of degradation as well as attrition which are possibly encountered in a circulating fluidized bed temperature swing adsorption (CFB-TSA) process, were conducted experimentally to evaluate the stability of a resin-based solid amine sorbent. Other characterizations methods, such as elemental analysis (EA), Fourier transform infrared spectroscopy (FTIR) etc. were applied to further reveal the degradation mechanisms. The results showed that thermal degradation occurs from 140–160 °C due to the decomposition of amine group. The CO2-induced degradation occurs from a higher temperature of 160–180 °C accompanied by the production of urea. Hydrothermal stability is good below 130 °C, but the ionic impurities in steam crystalized on particle surface can accelerate the degradation. Oxidative degradation is the most harmful, which starts at a lower temperature of 70–80 °C with the formation of aldehyde. The existence of H2O in atmosphere can alleviate the oxidative and CO2-induced degradations. The employed sorbent has a very low attrition index of 0.05, which is 1–2 orders lower than typical commercial fluidized bed catalysts. Based on the results of stability evaluation, some design suggestions for proper utilization of this sorbent or other similar resin-based sorbents have been provided in an industrial CFB-TSA process.
- Bettersizer 2600
De-branching of starch molecules enhanced the complexation with chitosan and its potential utilization for delivering hydrophobic compounds
DOI: 10.1016/j.foodhyd.2023.109498 Read ArticleShihezi University | 2024The current study aimed to prepare the complexes between debranched-waxy corn starch and chitosan polymers (DBS-CS), and then investigated their corresponding structural characteristics, rheological property and potent application in Pickering emulsion. The results indicated that the existence of chitosan significantly inhibited starch short-range molecular rearrangement for all DBS-CS samples, which was manipulated by both debranching treatment and chitosan content. Interestingly, this is the first study to reveal that the outstanding peak at 1.8 ppm in 1H NMR spectrum for sample DBS-CS was gradually shifted towards a lower-field region following an increased chitosan content. Moreover, the debranching treatment shifted the crystallinity pattern from A-type to B-type and the relative crystallinity of DBS-CS decreased gradually with the increased content of CS. All samples had a pseudoplastic fluid and shear-thinning behavior with an enhanced shear resistance following the complexation. The DBS-CS was applied in a Pickering emulsion for showing a greater emulsifying stability and a lower gel strength than native NS-CS prepared emulsion. Importantly, the encapsulation ability of curcumin in the DBS-CS emulsion was significantly improved, followed by an increase of 15.45% for its corresponding bioavailability compared to the control. Therefore, this study might highlight a potential carrier for delivering the bioactive substances in a green pattern. - Bettersizer 2600
Heat-induced aggregation behavior of wheat gluten after adding citrus pectin with different esterification degree
DOI: 10.1016/j.foodhyd.2023.109420 Read ArticleGansu Agricultural University | 2024Wheat gluten aggregation during heat treatment is beneficial to the final quality of gluten-based products. Exogenous pectin can affect gluten aggregation. However, the effect of pectin with different degrees of esterification on the heat-induced aggregation behavior of gluten and its possible mechanism are still unclear. Thus, the heat-induced aggregation behavior of gluten after adding pectin with different esterification degree was studied in this study. When the temperature was raised from 25 °C to 95 °C, pectin affected gluten aggregation and was related to the degree of esterification. Specifically, the results of rheological properties and particle size indicated that low-ester pectin improved the viscoelasticity of gluten and promoted gluten aggregation. Thermal properties revealed that enthalpy of gluten added with low-ester pectin (37%) increased from 92.96 J/g to 95.40 J/g during heating process. Structurally, the fluorescence intensity and surface hydrophobicity of gluten added with low-ester pectin (37%) were lower than those added with high-ester pectin (73%). In addition, low-ester pectin (37%) significantly increased the disulfide bond content (from 15.31 μmol/g to 18.06 μmol/g) and maintained β-sheet content of gluten compared with gluten alone at 95 °C, indicating that low-ester pectin was more likely to induce gluten aggregation. However, scanning electron microscope showed that the gluten added with low-ester pectin (46%) exhibited a denser network structure at 95 °C than that added with low-ester pectin (37%). These results will provide a theoretical base for the regulation of gluten aggregation and the quality of gluten-based products by pectin with different esterification degree.
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