eChapters

Plans need not be made for nuts and bolts, but are essential to prevent future bottlenecks. If enough cushions are provided for the future, the economy will grow smoother and faster. The importance of plan is that when you design it before you implement it; you have a better chance of eliminating design flaws from the beginning. If you start out coding and later on figure out you have a design flaw, it is extremely painful to go back and re-implement everything. Certain software engineering experts have estimated that it can cost up to 10x more (time and money) to fix a design problem in the later stages of software development than in the early stages.

Fixation is the first and utmost important step to take good histology of eye ball. The eye is a composite organ made up of layers of different consistencies that tend to separate during fixation and sectioning (Drury and Wallington, 1980).
Fixation (Davidson’s fluid)
Davidson’s fluid is an excellent fixative for fixation of whole eye ball but conventional 10% formalin causes artificial cellular shrinkage and poor cellular and nuclear resolution of the retina. Formaldehyde penetrates tissue well but takes more time because sclera stands as physical barriers that protects the retina and inhibit the penetration of fixative. Davidson’s fixative is acetic acid, alcohol- formalin based fixative in which alcohol denatured the protein by breaking hydrogen bonds and disturbing their tertiary structure and acetic acid increase the penetration. It has been advocated and widely used for the preservation of eye ball, maintaining retinal attachment during fixation and processing and providing better preservation of the retinal nuclear layer and sensory specialization of the rods and cones.

CORPUS

Fixation of rubber slipper over the foot, after application of fracture, immobilising devices the foot is protected with rubber slipper to avoiding soiling and affection of foot (Fig. No-1).

The foot protection the protective rubber slipper is applied given to both their foot (Fig No.2).

Gum bandage, immobilised limb (Fig No.3).

As well as POP cost application (Fig No. 4).

The rubber could be given anterior to posterior derection to avoid entering of soiling towards the foot.

The slipper retain in position with due to splint.

Fixation can be done by either wet fixation or dry fixation. If staining is to be delayed for a few days, cell preservation enhanced by fixation. Fix the slide within 30-60 seconds.

Wet Fixation

Nutrient adsorption in soil is one of the important phenomena in terms of nutrient availability to plants. Due to the nutrient fixation of the added nutrients supplied through fertilizers or manures may result the increase in cost of production due to the non-availability of the added nutrients at the optimum level to the plants. Hence, management options are required to release the sorbed nutrients from soil for better availability to the plants. The ion-fixation is driven by physico-chemical and biological processes and varies under agro ecological situations. The chemistry of ion fixation in the form of specific or non-specific adsorption on soil colloids will help understanding the bonding and adsorption reactions of ions in the soil.

8.0 What is fixation?

Fixation of plant nutrients in soil may be defined as the process, where readily soluble plant nutrients are transformed into less soluble forms by physical or chemical reaction with organic or inorganic compounds and thus restricting the mobility of ions in soil that leads to the decrease in availability to the plants. There are two kinds of fixation in general, viz; cation (N, K, Fe, Mn, Cu, Zn, Ca,Mg etc.) and anion (P, B, Mo etc.) in soils. The fixation of ions in soil is governed by important physical and chemical parameters of soil based on which the available pools of nutrients for plants may be determined.

Principles of Working
(Lundegårdh, 1929-1934 : Mac Intyre, 1961)

Flame photometry is the measurement of the concentration of an ionic material in a solution introduced in  to a flame, where the intensity of light emitted by the flame under these conditions is measured. We should give credit to Kirchhoff and Bunsen (1860), who developed the idea of emission spectroscopy into quantitative inorganic analysis, later on Janssen (1970) made lot of developments in this direction. The main parts of flame photometer are: (1) burner, (2) atomizer which disperses the solution as a fine spray into the flame; a means of isolating from the spectrum (i.e., filtering system, diffraction gratting etc.) only that portion of the emitted light which is a specific characteristics of the substance being examined ; a photosensitive detector with or without amplifier; and a method of measuring the desired emission. In flame photometry the diluted biological fluid is atomized directly ino the flame without need of preliminary separation. The resulting emissions are those of all the inorganic ions present. For measurement the emitted light is passed through a monochromater where the wavelength most characteristics of the material analysis and which most closely follows Beer’s law is selected.

When an element burns in a flame it emits radiation characteristic of its identity. Flame photometry is the determination of an element in solution by measurement of emission of light by atoms of the element in flame. Initial tests for identification of a few elements by flame tests are well known. Na burns with yellow flame, K with lilac flame, Ca, with red flame, Cu, with green flame etc. Emission of characteristic radiation by an element and correlation of emission intensity with the concentration of that element form the basis for flame photometry.

The sample to be analyzed is prepared in solution and sprayed under controlled conditions into a flame. The light from the flame enters a monochromator to isolate the desired region of the spectrum. A photocell and an amplifier measure the intensity of the isolated radiation. After proper calibration of the photometer with solutions of known composition and concentration, it is possible to correlate the intensity of a given spectral line with the unknown concentration of that element. A calibration curve prepared using known concentrations is useful. Internal standards and addition of known concentration of sample to be quantified are more useful.

1. INTRODUCTION

Sensory science is the fundamental physiological and psychological underpinnings of sensory evaluation and includes our basic understanding of the mechanisms of taste and odour, kinesthetic and the various techniques of scaling and statistical analysis, whereas, sensory evaluation could unfold the application of this knowledge and the development of specific methods for the evaluation of the discriminative, descriptive and affective nature of products, in a problem-solving situation. When the Quantitative Descriptive Analysis (QDA) methodology was first described, it represented a decade of experimentation and study of the issue that were perceived at the time to be the impediments in solving “the problem of flavour characterization” Further, new developments and knowledge about sensory evaluation were beginning to have a positive effect on its acceptance by the food industry, but much more needed in be done if it is to contribute in a meaningful way. Today, it is indisputable that flavour is an important attribute affecting consumer acceptance of food and it is taste plus odour. The perception of taste is merely the detection of non-volatile tastants by the tongue while in other words, the perception of odour is the detection of odoriferous volatile aroma compounds by the olfactory nerves ending in the nose. The combination of all the possible flavour stimuli that could be encountered is as vast as the galaxy.

Introduction

How one can differentiates between sensory science and sensory evaluation? Perhaps the simplest way would be to think of sensory science as the fundamental physiological and psychological underpinnings of sensory evaluation. It could include our basic understandings of the mechanisms of taste and odour, kinesthetic and the various techniques of scaling and statistical analysis, whereas, sensory evaluation could designate the application of this knowledge and the development of specific methods for the evaluation of the discriminative, descriptive and affective nature of products, in a problem-solving situation. When the quantitative descriptive analysis (QDA) methodology was f irst described, it represented a decade of experimentation and study of the issue that were perceived at the time to be impediments to solving “the problem of flavour characterization” (Stone et al., 1974). As noted by Pangborn (1964), new developments and knowledge about sensory evaluation were beginning to have a positive effect on its acceptance by industry, but much more needed to be done if it was to contribute in a meaningful way. Today, it is indisputable that flavour is an important attribute affecting consumer acceptance of food. “Flavour is taste plus odour”. The perception of taste is merely the detection of non-volative tastants by the tongue. On the other word, the perception of odour is the detection of odoriferous volatile aroma compounds by the olfactory nerves ending in the nose. The combination of all possible flavour stimuli we could encounter is as vast as the galaxy. However, most of the attempts to define these experiences have historically been over simplified.

1. Flavor is a sensory phenomenon depending upon
   1. Taste, texture or mouthfeel
   2. Odour or aroma, appearance
   3. Temperature - sensation of heat or cold
   4. All of these
2. Flavours are minor constituents of foods, usually
   1. Nutritive
   2. Non - nutritive
   3. Energetic
   4. None of them

Flavour, colour, inclusions, ripples, and variegates play important roles in creating distinctive ice cream products and enhancing consumer appeal. This chapter examines different flavouring materials and colouring systems used in ice cream, together with chocolate, cocoa, fruits, nuts, cookies, sauces, and other inclusions. It explains the formulation and processing considerations associated with ripples, ribbons, variegates, and complex flavour systems. Proper ingredient compatibility, dosage, distribution, and processing are essential for maintaining product quality. The chapter also addresses common flavour defects and their possible causes. Together, these topics provide practical guidance for developing attractive, innovative, stable, and commercially successful flavoured ice cream products.

A. Diseases

1. Anthracnose

Occurrence & severity status

Anthracnose has a serious impact on yield and fibre quality of flax (Linum usitatissimum) and is well-known in Europe, Asia and America. Flax anthracnose increased in Germany when flax production was expanding in the 1930s (Rost 1938). The anthracnose pathogen is seed- and soilborne, causes damping off of flax seedlings (Rost 1938), and is one of the causal organisms of so-called flax-sick soils (Bolley & Manns 1932). It has been recorded in nearly every country where the crop is grown either for fibre or oil. It is known to occur in Belgium, the British Isles, Canada, Formosa, France, Germany, Holland, Japan, Latvia, Lithuania, New Zealand, Poland, U.S.A. and the U.S.S.R. (including Siberia), in most of which countries its incidence has resulted in appreciable crop losses (Muskett and Colhoun, 1947). The disease is most common in cool and humid flax-growing areas (Nyvall, 1989). The disease is destructive to the crop, especially when the seed source is contaminated by the fungus. It can spread rapidly under favourable conditions causing severe local epidemics and heavy losses in yield and quality of both fiber and seed (Mercer, 1992c; Rashid, 2003b). The losses of 50% in fibre yield in an epidemic year were reported by Muskett and Colhoun (1947). Ondrej (1985) indicated a considerable loss in fibre strength on attack by anthracnose.

The condition is one of the most common pruritic skin disease caused by hypersensitivity reaction to the flea salivary antigens. Type I immediate hypersensitivity, type II delayed hypersensitivity and cutaneous basophil hypersensitivity to the flea salivary antigens have been recorded. Late phase IgG mediated reaction also caused in this condition. It occurs in dogs mostly between 1 and 3 years of age.

Flood-control economics compares the financial, social, and environmental costs of flood damage with the costs and benefits of alternative mitigation measures. Because complete protection is generally impractical, planners must identify an economically justified level of risk reduction. Evaluation considers construction, operation, maintenance, rehabilitation, residual risk, avoided losses, project life, discount rates, and direct and indirect benefits. This chapter introduces economic assessment of flood-control projects and examines flood-damage estimation, depth-damage relationships, benefit-cost analysis, present value, and investment decision criteria. It also considers remote-sensing approaches for mapping inundation and assessing losses. The discussion supports the selection of measures that are technically feasible, socially acceptable, environmentally responsible, and economically efficient.

Flood-control measures aim to reduce the probability of inundation or limit its harmful consequences. Structural measures physically modify water flow or storage and include dams, reservoirs, levees, floodwalls, diversions, channel improvements, detention basins, and watershed-treatment structures. Non-structural measures reduce exposure and vulnerability through forecasting, warnings, zoning, insurance, preparedness, evacuation, public education, land-use control, and disaster-response planning. This chapter classifies and evaluates both groups of measures, explaining their purposes, benefits, limitations, and selection criteria. It emphasizes that no individual intervention provides complete protection. Effective flood-risk reduction normally requires an integrated combination of structures, sound watershed management, reliable information systems, institutional coordination, and community participation.

Flood diversion redirects part or all of an excessive flow away from a vulnerable river reach, settlement, or agricultural area. Water may be conveyed through diversion channels, floodways, canals, tunnels, spillways, or natural depressions and discharged into another river, reservoir, wetland, or safe storage area. A diversion scheme must have sufficient capacity and a dependable control structure while avoiding unacceptable flooding, erosion, sediment deposition, or environmental damage elsewhere. This chapter explains the purpose, principles, and methods of flood diversion. It covers site selection, diversion routes, hydraulic and structural components, design discharge, operational requirements, advantages, limitations, maintenance needs, and the role of diversions within integrated basin-level flood-control planning.

Flood estimation determines the probable magnitude and frequency of flood events for designing hydraulic structures and managing flood risk. Intense rainfall over a catchment generates excess water after interception, infiltration, evaporation, and depression storage have been satisfied. This runoff reaches the drainage system and may cause flooding when channel capacity is inadequate. Reliable estimates help engineers select suitable dimensions for dams, spillways, bridges, culverts, reservoirs, and other protective works. This chapter describes rainfall-based and streamflow-based estimation techniques, including the Rational and Cook’s methods, unit-hydrograph procedures, frequency distributions, Gumbel, log-normal and Log-Pearson Type III analyses, empirical formulae, flow-mass curves, and partial-duration series.

Hydrology examines the occurrence, circulation, distribution, and properties of water in the atmosphere and on Earth. Solar energy drives the hydrologic cycle through evaporation, condensation, precipitation, infiltration, runoff, and groundwater movement. Rainfall first satisfies interception, depression storage, evaporation, and infiltration before excess water begins flowing across the surface and into channels. When runoff entering a river exceeds its conveyance capacity, flooding may occur. This chapter explains clouds, precipitation measurement, rain-gauge networks, rainfall consistency, infiltration, runoff mechanisms, hydrographs, unit hydrographs, empirical runoff models, and stage-discharge relationships. These concepts provide the scientific foundation required for analysing floods and designing appropriate control measures.

Flood management is a continuing process of assessing flood risk and coordinating prevention, preparedness, response, recovery, and adaptation. Unlike flood control, which often emphasizes physical structures, integrated flood management accepts that floods cannot always be eliminated and seeks to balance their risks and beneficial functions. It protects life and property while considering river-basin development, environmental sustainability, social needs, and economic feasibility. This chapter explains flood-management concepts, objectives, purposes, and techniques. It discusses structural and non-structural actions, forecasting, watershed treatment, afforestation, rainwater harvesting, floodplain zoning, community preparedness, institutional responsibilities, interlinking proposals, and government programmes. Emphasis is placed on coordinated, basin-wide and risk-informed decision-making.