Ask the Expert: Holiday Shopping
Dr. Deborah Fowler, Associate Professor of Retail Management at Texas Tech University answers your questions about holiday shopping in this edition of Ask the Experts.
Cymatics: Geometric Sound Patterns An interesting experiment which shows sand on a vibrating metal plate forming various geometric patterns as a result of changing frequencies. Warning: it is a good idea to lower your volume before watching this video.
Alfred University Holiday Greeting 2012
All of us at Alfred University wish you Happy Holidays, and invite you to view our 2012 video card.
It is titled "If Winter Comes," with original 1930s cinematography by W. Varick Nevins III, class of 1932, for whom Alfred University's Nevins theater is named.
Step back in time to get a brief but special glimpse into a bygone era when things were simpler, life moved at a slower pace, and maybe, just maybe, the snow was a little deeper.
"If Winter Comes" is our holiday greeting to you, and
1.3 Balanced energy intake There is a need for a certain daily energy intake to allow metabolism to occur in the body. Metabolism means all the chemical reactions occurring in the body and there are two types of process involved: catabolism breaks down larger molecules into smaller ones often with energy release and anabolism is the building up of larger molecules from smaller precursors, often requiring energy. The body requires energy to power anabolic, mechanical (for example, muscle contraction
5 Nuclear energy Einstein's famous equation E = mc2 shows that mass (m) and energy (E) are proportional to one another. The constant c2 linking the two is the square of the speed of light c (3 × 108 m s−1). Implicit in the equat
4.6 The fossil fuel ‘bank’ During the period of accumulation of most coal and petroleum, the past few hundred million years, the equivalent of around 1023 J of chemical energy have been ‘banked’ by Earth processes. As you have seen in Author(s):
4.2 The terrestrial carbon cycle Figure 1.10 shows the rates of natural carbon exchange between the terrestrial system and the atmosphere. Acknowledgements The content acknowledged below is Proprietary (see terms and conditions) and is used under licence. Grateful acknowledgement is made to the following sources for permission to use material: 3.9 Questions for Unit
Figure 19 is a graph showing how the viscosity (thickness and stickiness) of a woman's cervical mucus changes with time. Day 0 is the start of her menstrual period. 3.6 Summary of Section 3 Many people wish to limit the number of their offspring, and so resort to contraceptive measures. Chemical contraceptives interrupt the production of gametes, or prevent implantation. Mechanical or barrier contraceptives prevent egg and sperm from meeting and, in the case of IUDs, prevent implantation. Surgical methods of contraception involve physical alteration of the reproductive tract so as to prevent e 2 Infiltration Precipitation that reaches the ground either runs off at the surface, or sinks into it. Infiltration is the movement of water through the ground surface into the soil and on downwards. The rate at which infiltration can take place depends, among other things, on the permeability of the soil or rock. Permeability is a measure of the ease with which water can move through a substance: the greater the permeability, the easier the infiltration.We shall deal with permeability of rock 2.5 The endocytic pathways and lysosomes Endocytosis is the process by which cells internalise molecules from the outside, and it includes pinocytosis, the uptake of small soluble molecules in vesicles, and phagocytosis, the internalisation of large insoluble particles. These are two ends of a spectrum as seen microscopically, but the receptors, the subsequent intracellular trafficking pathways and the fate of the internalised molecules, vary depending on the cell type and its functions. The endocytic pathway co 2.1 Introduction This section reminds you of the numerous specialised intracellular compartments of the eukaryotic cell, with how molecules are moved rapidly and specifically between them in eukaryotic cells. What are the principal membrane-bound compartments of the cell and the trafficking pathways that connect them? Early and late end 1.5 Summary The cytoskeleton is formed of microtubules, microfilaments and intermediate filaments. Microtubules are formed by polymerisation of tubulin and microfilaments by polymerisation of actin. Assembly and disassembly are faster at the plus end of the filament. Both microtubules and microfilaments can display treadmilling and dynamic instability, in appropriate conditions. Actin is an ATPase, and actin-ATP is less readily dissociated from the ends o 3.4 Second messengers In the previous section, we have discussed the principles of second messengers (Section 1.5) and, in particular, those produced by PLC (IP3 and DAG) and PI3 kinase (PI(3,4)P2 and PI(3,4,5)P3). We shall now consider the roles and mechanisms of action of the other chief mediators, which are Ca2+ ions, cAMP and cGMP 3.3.2 Phospholipase C (PLC) Members of this family of enzymes contain two catalytic domains and several protein binding domains (Figure 13). The PH domain can temporarily tether phospholipase C to the membrane by attachment mainly to PI(3,4)P2. We shall discuss two main isoforms of PLC: PLC-β, which is activated by a subset of trimeric G proteins (Gαq an 3.3.1 Phosphatidylinositol 3-kinase (PI 3-kinase) Members of this family of lipid kinases usually have two subunits: one is a catalytic subunit with a lipid kinase domain and the other is a regulatory subunit, which contains two SH2 domains and a SH3 domain (p 85 PI 3-kinase in Figure 13). 2.6 Summary Receptors comprise a limited number of structural motifs, which determine binding affinity and specificity of receptor–ligand complexes. Some ligands bind to several receptors and some receptors bind to several ligands. Acetylcholine is a good example of a ligand with two structurally different kinds of receptor. Nicotinic receptors are ion channels, which are found predominantly in skeletal muscle, and are stimulated by nicotine. Nicotinic 7.5 Emission from spiralling electrons: synchrotron radiation In the very first reading (Activity 1) we encountered the term ‘non-thermal’ describing the spectrum of light emitted from AGN. In this subsection we will learn more about the most important type of non-thermal radiation: synchrotron emission. When a charged particle moves in the presence of a magnetic field it experiences a Lorentz force, which produces an acceleration whose direction is perpendicular to both the magnetic field line and the velocity of the particle, 1.3.1 Inheritance of colour in maize We can trace the inheritance of characters in animals and plants by following the phenotype from generation to generation, in breeding experiments. We will describe work with maize (Zea mays), alternatively called corn (sweetcorn, or corn on the cob), which occurs throughout the world as an extremely important commercial crop plant, and which is used extensively in genetic research. We can also study the inheritance of characters at the level of the genotype. In this section we will ju
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Question 1 (Objective 2)
