Search

When you come home from school, how do you de-stress? Many teachers find that indoor gardening is an easy, satisfying, year-round hobby that helps them unwind. And there are side [...]

Fertilizers and pesticides that are non-toxic can be made from materials that can be purchased from local stores. Directions are given for making the garden and lawn sprays. Safety tips for using chemical preparations are included.

The value of microfilm has been impacted in several major areas by the development of more effective alternatives. Where rapid access to information stored at multiple locations is a vital [...]

In an auto crash case, the local department of motor vehicles can supply you with much of the information you need at little cost. You can usually obtain: The registration [...]

According to 'Osmium is Forever: Rare metal's strength humbles mighty diamond's' (SN: 4/6/02, p. 211), osmium is the least compressible of materials. When I looked at an encyclopedia article about [...]

The article offers information on the provisions of the Convention for the Unification of Certain Rules for International Carriage by Air (Montreal Convention), which deals with the punitive damages, liability of carriers and exoneration in the case of death and injury of passengers in international air travel. It discusses the significance of the Chicago Convention held by the International Civil Aviation Organization (ICAO) in establishing the aviation law for aircraft safety.

Although the the mortgage refinancing boom will subside as interest rates rise, there is still refinancing business available in a number of areas. For example, a slight rise in rates will trigger refinancing from people who were waiting for the lowest possible rate and from those who have procrastinated refinancing their mortgage loans. In addition, several companies are introducing refinancing programs to help people whose home values have deteriorated. Altogether there is still $1.5 trillion in home mortgages that have yet to be refinanced despite low rates., The refinance boom-bust theme has been sounded so often that it now ranks with death and taxes as one of the axioms of life. But the reports of the industry's [...]

Abstract. The apex of the larval antenna of the crane fly Nephrotoma suturalishas 6 cuticular sensilla that stained intensely black with silver nitrate, which indicates their porosity. The large sensory cone is innervated by 14 neurons and the 3 small, smooth surfaced, conical pegs have 4 neurons each. The small and large cylindrical sensilla with their smooth walls and pleated apices are innervated by 4 and 6 nerve cells, respectively. The 15 sensilla on the apex of the maxillary palp are all stained by silver nitrate. These sensilla are of five types: 7 type A sensilla with a smooth surface, a distinct apical pore, and 3 or 4 neurons; 2 type B sensilla with a smooth surface, many pores, and 5 neurons; 1 type C sensillum with a grooved surface, a large apical pore, smaller pores in the grooves, and 6 neurons; 3 type D sensilla with a smooth surface, a grooved apex that is elongated into a projection, and 4 neurons; 2 type E sensilla with many pores covering the surface, leaf‐like appearance, and 4 neurons. The number and types of sensilla are similar to those in other nematocerous larvae, but in the many different forms of sensilla and the structure of the sensory cone, these tipulid larvae differ greatly from other larvae of lower Diptera.

The eyes of Protzia constans consist of anterior and posterior biconvex lenses that are lamellate and have a thin cuticular layer with pore canals on the dorsal surface. There are four retinula cells beneath each lens and no vitreous cone or preretinal membrane is associated with either lens. The rhabdomeres are in direct contact with the lenses and are fused into a single rhabdom. The visual pigments are situated under each rhabdomere and along the sides. Secondary pigments are concentrated between the cuticule of the body and the retinula cells, and between the retinular regions under each lens. These pigments are a type of lipid(s) that provide a barrier to extraneous light. The cuticle of the eye capsule forms a long extension that reaches into the body cavity and a muscle is attached to the cuticular estension. This muscle is probably capable of changing the position of the lateral eye in respect to the light

Unlike other gyrinid species, the chorionic surface of Dineutes horni is covered with blunt conical projections. The micropylar region consists of a stalk-like structure in the center of a depression. Internally the chorion consists of an exo- and endo-chorion. The outer chorion has large spaces and is composed of a laminated and porous material, whereas the inner chorion is made-up of a thick granulated layer and a thin electron-dense layer. The vitelline membrane has an electron-dense upper surface and spherical, vesicular-like structures that are dispersed throughout the membrane.

The article presents suggestions from readers on model making. One of the reader advises to recycle, upcycle, and reuse things when modeling. Another reader recommends to use eye shadow for weathering and shading models and dioramas and as pigment powder or pastels to simulate rust, dirt or wear while model making.