Physical properties of oleogels fabricated by the combination of diacylglycerols and monoacylglycerols

Oleogelation is an efficient way to structure oil and reduce saturated fatty acids of lipid products. Multi-component gels are of particularly interest attributed to the ability to tune gel properties by alteration of the component proportions. In this study, monoacylglycerol (MAG) and diacylglycerol (DAG) are used as gelator mixture and the influence of the ratio of these two crystalline particles on the characteristics of oleogels was investigated. The crystallization and melting behavior, solid fat content (SFC), crystal morphology, polymorphism and mechanical properties of the oleogels were characterized. The oleogels with higher gelator level displayed higher oil binding ability and shorter crystal formation time. The oleogels with higher MAG ratio exhibited more blade-like crystals, and the mixed oleogels with MAG: DAG of 3:7 and 5:5 showed altered crystal morphology with finer crystal size and reduced crystallization enthalpies possibly due to the increased nucleation seeds promoted by MAG. The oleogels with high MAG level showed lower equilibrium SFC during isothermal crystallization but faster crystallization rate, higher hardness and elasticity. Therefore, by changing the ratio of DAG with MAG, the crystallization profile and rheological properties of oleogels can be tailored and used as traditional solid fat substitutes in lipid-based products.

A Study of the Quantitative Relationship between Yield Strength and Crystal Size Distribution of Beeswax Oleogels

Beeswax and beeswax hydrocarbon-based oleogels were studied to evaluate the quantitative relationship between their yield strength and crystal size distribution. With this aim, oleogels were prepared using four different cooling regimes to obtain different crystal size distributions. The microstructure was evaluated by polarized light microscopy. The yield strength is measured by the cone penetration test. Oleogels were characterized by average grain size, microstructure entropy, grain boundary energy per unit volume, and microstructure temperature. We have provided the theoretical basis for interpreting the microstructure and evaluating the microstructure-based hardening of oleogels. It is shown that the microstructure entropy might be used to predict the yield strength of oleogels by the Hall-Petch relationship.

Акустооптическая многолучевая аксиальная дифракция в парателлурите

To form a multi-beam radiation pattern, it is proposed to use the axial geometry of acousto-optic interaction in paratellurite. In single frequency mode, the use of this geometry for angular scanning is characterized by a dip in the frequency response. Optimization of a multifrequency radio signal makes it possible to effectively divide laser radiation into several beams, while maintaining the fundamental advantages of axial geometry: minimum crystal size and power consumption

Use of modulators and light to control crystallisation of a hydrogen bonded framework

Modulators, light and solvent are used to control the crystal size of a hydrogen bonded framework.

Aplikasi Mesin Pemasak Minuman Rempah Jahe (Zingiber officinale) Dengan Pengaduk Otomatis di UKM Polanmadu

<p><em><strong>Cooking Machine Application of Ginger Drink (Zingiber officinale) with Automatic Stirrer at UKM Polanmadu</strong></em>. The trend of instant spice drinks that function to maintain the body’s immunity is growing rapidly in the era of the Covid-19 pandemic. Ginger, which is a spice with various benefits, has made many Small and Medium Enterprises (SMEs) industry players take advantage of this potential. One of them is the instant spice drink SME industry player "Polanmadu" which produces natural instant spice drinks. The processing of instant spice drinks is still done conventionally, making Polanmadu SMEs unable to reach consumer demands. The purpose of these activities was to the introduction of appropriate technology in the production of instant spice drinks to produce products with more guaranteed quality and able to generate additional income for partners. The application of the cooking machine is useful so that the stirring process which has been going on for 3 hours conventionally using human power is replaced with electric power so that it is more efficient and profitable. The implementation begins with identification, planning, assembling tools, testing tools, and introducing tools to the spice instant drink production unit. The result showed that the introduction of a spice instant drink cooking machine can produce 20% more crystal ginger extract, automatic stirring while at the same time speeding up the formation of crystals from 3 hours to 2.5 hours, and the product crystal size is more homogenous and an increase in profit of Rp906,000-/day. Overall, the introduction of this spice-cooking machine makes the productivity of SMEs for instant spice drinks increase in quality and quantity.</p>