eChapters

Streptomyces are soil-borne bacteria known for production of several antibiotics, antifungals, antivirals, antitumoral, anti-hypertensives and immunosuppressives. Krainsky (1914) first described S. griseus and named the species Actinomyces griseus. Waksman and Henrici (1948) changed the name to Streptomyces griseus.

Dermatophilus congolensis was first described from clinical case of exudative dermatitis in cattle in Congo by Van Saceghem (1915). It is primarily known as an animal pathogen causing acute, sub acute or chronic skin disease. The first cases of human infection with D. congolensis were reported in 1961 in four people who developed skin infection after handling an infected deer in USA.

Family : Myrtaceae

Flowering: April-May

Fruiting: July-August

Botanical description: The plant is an evergreen tropical tree, 50 to 100 ft. tall, with oblong opposite leaves that are smooth, glossy and having a terpentine smell. It has fragrant white flowers in branched clusters at stem tips and purplish-black oval edible berries. The leaves are antibacterial, and are used for strengthning the teeth and gums. The fruit is ellipsoid or oblong, variable in size and shape, usually up to 2.5 cm long, black, shining and juicy when fully ripe. Seeds always one, with thick rounded fleshy cotyledons, closely appressed on their inner faces.

Common name    :    English- Marigold
        Hindi- Genda 
        Odia- Gendu

Family    :    Asteraceae

Habit & Distribution
It is a herb (Fig. 82 a) commonly cultivated in gardens. It is a very popular flowering plant commonly found in India and other countries.

General Characters
The plant is a very popular aromatic annual herb with 50-100 cm in height. The leaves are pinnately divided, in to oblong or lanceolate. Flowers are yellow, orange in colour, and large head with 3-5 inches across. The plant flowers mainly during cold season.

Family: Talinaceae

Flowering: September-October

Fruiting: November-December

Botanical description: The plan is an erect, stout, fleshy herb, growing up to 0.5-1 m in height. Leaves are elliptic to obovate, 5-15 cm long, 1.5-5 cm wide, tip pointed to tapering. The flowers are borne in 2-5-branched, raceme like clusters, 3-20 cm long with a stalk about 8-11 mm long. Petals are pink, obovate, up to 1 cm long. Capsules are pale yellow, ellipsoid, 6-7 mm long. Then plant flowers and bears fruits during September-December.

Common name    :    English- Tamarind
        Hindi- Imli 
        Odia- Tentuli

Family    :    Fabaceae

Habit & Distribution 
The plant is a large tree (Fig. 83 a), fairly common, planted or self sown. It is widely distributed throughout India, also cultivated and self-sown.

General Characters
It is a large tree which grows up to 30-50 m height with spreading crown up to 12 m in diameter. The leaves are up to 5 cm long and composed of numerous small leaflets. Leaflets are 10-20 pairs, small and close. The flowers are about 1 cm across, pale yellow with purple or red veins. Fruits are brown, short haired, sausage like, contain an acidic pulp that surrounds the seeds, extremely sour. The plant flowers during April-June and bears fruits during December-March.

1. Botanical Name : Tamilnadia uliginosa (Retz.) Tirveng. & Sastre

2. Family : Rubiaceae

3. Common Name : Divine Jasmine, Tamilnadia

4. Name in Indian languages

Kalaphendra (Marathi), Wagatta, Kalikarai (Tamil), Pindichakka (Malayalam), Kuka-elka (Telugu), Pidaar(Nepali).

5. Description

Divine jasmine is a very rigid, ramous, small tree, armed with numerous strong thorns. This found in bogs, swamps, banks of rivers and other moist places. It flowers in the beginning of the hot season. The flowers of this species, are known for beauty. It is good shrub for flower garden. It is an important medicinal plant because each and every part of it can be used for medicinal purposes. Sometimes leaves of the plant are used to make chutney.

6. Origin and distribution

It is native of India. It is distributed in India, Bangladesh, Srilanka, Thailand, Vietnam. In India, this species is found in moist deciduous forests.

Common name    :    English- Teak
        Hindi- Sagun
        Odia- Sagwan 

Family    :    Verbenaceae

Habit & Distribution 
The plant is a tree (Fig. 84 a), naturally confined to south-western part of Orissa, also widely planted all over the state. The plant commonly distributed in central India to Orissa, also widely planted.

General Characters
It is a large deciduous and very popular timber tree. Leaves of the tree are large, opposite with 30-60 cm long and 15-30 cm broad. The flowers appear in large numbers in lax clusters at the end of branches with white colour. The fruit is about 15 mm across, spongy and enclosed in persistent calyx. The plant flowers during July-August and bears fruit during December-April. 

5.1 Definitions

The erodibility of soil is its vulnerability or susceptibility to erosion, that is the reciprocal of its resistance to erosion. A soil with a high erodibility will suffer more erosion than a soil with low erodibility if both are exposed to the same rainfall. Whereas the erosivity of rainfall was shown in chapter 4 to be a fairly straightforward measure of the rain’s physical properties, the assessment of erodibility is more complicated because it depends upon many variables. There are alternative uses of the term erodibility. In the widest sense it can be used to include all the variables which effect erosion except the erosivity of rain, as in the first line of figure 2.2. It is also used in the narrower sense as a measure only of the effect of physical characteristics of the soil, as in the erodibility index K of the Universal Soil Loss Equation, where the effects of land management and crop management are assessed separately, as shown in the last line of figure 2.2.

5.2 Factors influencing erodibility

In this chapter we will look at the three broad groups of factors which affect erodibility. First, there are the physical features of the soil, including the chemical and physical composition. Second, there are the topographic features, such as the slope of the land. Third, there is the management of the land, i.e. how it is used.

6.1 Quantities and rates of runoff

Before a start can be made on the design of the channels and ditches and other works which can deal with surface runoff we need to know the probable quantity of water. If the object is to impound or store the runoff then it may be sufficient to know the total volume of water to be expected, but the usual conservation problem is conveying water from one place to another, and in that case the rate of runoff is more important, and particularly the maximum rate at which runoff is likely to occur. That is the flow which a channel must be designed to accommodate.

In a hypothetical catchment area* with an impervious surface and no losses the maximum rate of runoff would be directly proportional to the rate of rainfall. In natural catchments there are other factors: some of the rain is intercepted by vegetation, some infiltrates into the soil, some starts moving over the surface but is trapped in depressions, and some is lost by evaporation. Estimates of rates of surface runoff therefore depend on two processes: estimating the rate of rainfall, and estimating how much of the rainfall becomes runoff.

There are several empirical methods for doing both and for combining the two factors, but because they are empirical two points must be stressed. Firstly, as with all empirical solutions, data, tables, and formulae developed in one situation should not be applied in different conditions without careful checks on whether the method is valid in the new situation. Secondly, each of the three main methods which will be

Common name    :    English- Indian Tinospora
        Hindi- Gulbel
        Odia- Gulochi

Family    :    Menispermaceae
 
Habit & Distribution
It is a shrub/climber (Fig. 85 a), frequently found in forests and widely distributed throught tropical India.

General Characters
The plant is a climber, with stems about 5 cm diameters with light grey and papery bark. The leaves are about 7.5-14 cm long, broadly ovate or orbicular, deeply heart shaped at the base. Flowers are racemes which are 7-14 cm in long, greenish yellow in colour and arranged in 3+3 sepals in 2 layers, the outer one are small, the inner one are large. Fruits are red, globose to subglobose with 6-8 mm across. The plant flowers during August-December and bears fruits during March-May.

Family: Apiaceae

Flowering: November-January

Fruiting: February-April

Botanical description: The plant is an erect, freely branching annual herb with finely dissected, lacy, blue-green leaves. The leaves are about 1 ft long and divided pinnately three or four times into thread like segments each about 1 in long. The dill plant grows about 3-5 ft tall.

Family : Lythraceae

Flowering: August-September

Fruiting: November-December

Botanical description: The water chestnut is an annual aquatic herb with a rosette of floating leaves and submerged, anchored into the mud by very fine roots. It has two types of leaves, finely divided, feather-like submerged leaves borne along the length of the stem, and undivided floating leaves borne in a rosette at the water’s surface. The floating leaves have saw-tooth edges and are ovoid or triangular in shape, 2-3 cm long, on inflated leaf-stalks 5-9 cm long, which provide added buoyancy for the leafy portion. Flowers are white in colour, with Four petals and are borne for a long period. The fruit is a nut with barbed spines. Seeds can remain viable up to 12 years, although most germinate within the first two years.

Common name    :    English- False white teak
        Hindi- Pindar
        Odia- Jandakhai

Family    :    Euphorbiaceae
 
Habit & Distribution 
The plant is a tree (Fig. 86 a), commonly found along riverbanks, evergreen and semi-evergreen forests. It is distributed throughout India.

General Characters
It is a large deciduous tree, growing up to 10-20 m tall, with a smooth grey bark. The leaves are oppositely arranged ovate, 7-17 cm long and are heart- shaped at the base and have tapering tips. Leaf-stalks are 3-7 cm long. Flowers are small and greenish. Male flowers are borne in 7-19 cm long racemes and are carried on slender stalks. Female flowers are borne singly on long stalks. Fruit is round, with 2-4 compartments, 2-4 cm in diameter, smooth or hairy, exocarp thick and fleshy. The plant flowers and bears fruits during December-March.

Family: Aizoaceae

Flowering: July-September

Fruiting: October-December

Botanical description: The plant is a succulent herb with prostrate forked branches, growing up to 20-45 cm long. Stems are prostrate or rising, somewhat succulent, up to 50 cm long or more, smooth or sparsely velvety. Leaves are flat, elliptic to obovate, 1-2 cm long, 0.4-2 cm wide, margins entire, tip blunt with rounded base. Leaf stalks are 0.5-2.5 cm long, expanded into a sheath joined with leaf base to form a cup. Flowers are pinkish or white in colour, borne solitary, stalkless, largely hidden in leaf axils. Capsule with a lower scarious or membranous portion and an upper brown. Seeds are black in colour with muricate concentric lines.

Common name    :    English- Coat buttons
        Hindi- Khal-Muriya
        Odia- Bisalya karani

Family    :    Asteraceae
 
Habit & Distribution
The plant is a herb (Fig. 87 a), usually found in dry locations, especially sandy and rocky sites like roadsides, railways, dunes and waste places. It is widely distributed throughout India.
 
General Characters
The plant is a perennial herb that stands about 30-60 cm in height and has slightly hairy stem. The leaves are ovate or lanceolate with toothed edges. Flowers are small, creamy or white in colour having 5 petals that are notched in the outer edges. The centre of the flower is yellow. The plant flowers and bears fruits all the year round.

Family: Fabaceae

Flowering: September-October

Fruiting: November-January

Botanical description: Thye plant is a small diffused herb, with erect to creeping habit. Leaflets are 1-4 cm long, 8-35 mm broad, obovate to oblong-wedge-shaped, tip rounded to notched. The flowers of the plant yellow in colour, bloom in 8-20-flowered clusters, with a stalks 3 mm long and sepals nearly equal, shorter than or as long as the tube. The fruit is 1-2 cm long, 2-3 mm broad, linear, sharp tipped, curved and 4-8-seeded.

Family: Fabaceae

Flowering: December-January

Fruiting: February-March

Botanical description: The plant is an erect, annual and strongly smelling herb growing up to 10-50 cm in height. The Leaves are trifoliate with leaflets 1-3 cm long, 5-15 mm broad, obovate to inverted-lanceo shaped. Flowers are cream or yellowish-white, in colour, 1-2 together in leaf axils and 1.2-1.8 cm long. Pods are oblong, straight or falcate with age, 7.5-10 cm long with a long beak and 20 seeded.

Common name    :    English- Burr Bush
        Hindi- Chikti
        Odia- Badya chana pata/tatatatia

Family    :    Tiliaceae

Habit & Distribution
The plant is a herb (Fig. 88 a), fairly common weed, distributed throughout tropical and subtropical India.

General Characters
It is an erect woody herb, grows up to 30-90 cm. leaves are simple, alternate, broadly ovate to sub orbicular. Flowers are yellow, small and clustered on leaf axils. Fruit is a subglobose and about 3-4 mm in diameter, covered with 75-100 hooked spines of 1.0 to 1.5 mm long. The plant flowers and bears fruits during July-January.

Abstract

Ladakh, comprising of Leh and Kargil district is truly described as a high altitude cold-arid desert region of J&K state, India, where local people grow barley (Hordeum vulgare) and prepare various food products out of it. The roasted barley flour, locally known as tsampa is one of them, which goes as ingredients in a variety of local dishes and beverages. It is eaten either in raw or in cooked form and the traditional method of tsampa preparation is through the Ran-tak (traditional water mill), for which efforts have been made to describe it in detail. Like other parts of the world, this remote area in the trans-Himalaya has also witnessed exchange with the outside industrial world which has brought with it many changes (both desirable and undesirable) and the traditional foods were also not left behind. One major cause for decline in the traditional tsampa preparation has been the availability of cheap subsidized produce from the lowland India, on the other hand the increase in information exchange with the outside world has also helped local people to realize the need and importance to conserve their own locally grown crops and integrate into the mainstream fooding system. However, tsampa prepared using the traditional method is still being preferred by the local inhabitants

Since the periods of Hippocrates and Lord Buddha cholera like symptoms was described in human. The first outbreak of cholera was described in India in 1817. Filippo Pacini (1854), an Italian anatomist, observed a gram-negative bacterium associated with human cholera. Robert Koch (1884) first isolated and confirmed the association of ‘comma-shaped bacteria’, later designated as Vibrio cholerae with the disease in Calcutta (India). In 1959, Sambhu Nath De, Professor of Pathology at Nilratan Sircar Medical College in Calcutta discovered the exotoxin produced by V. cholerae and a simple method (rabbit ligated ileal loop assay) to study the in vitro effect of exotoxins. The Ganges delta of India and Bangladesh is considered as the worst affected place with cholera although the infection is widespread throughout the world. The spread of cholera in different continents occurred through six ‘waves’ (‘pandemics’) since 1817. The current seventh pandemic (7P) was originated in Indonesia (Sulawesi) in 1961 and spread throughout Asia, Africa and Latin America. In 1963, the seventh pandemic reached South Asia and circulated for more than 50 years with intermittent transmission to other continents. The recent major 7^th pandemic outbreak was detected in Haiti causing more than 9400 deaths in 2010 which was originated through patients from endemic countries.

In 1886, Escherich observed Campylobacter like organisms in stool samples of children with diarrhoea. In 1913, McFaydean and Stockman first confirmed the bacteria as Campylobacter in foetal tissues of aborted sheep. Confirmatory tests were also carried out by Smith in 1918 when similar bacteria were isolated from aborted bovine foetuses. The bacteria were then known as Vibrio foetus. In 1963, due to certain differentiating characteristics, the organisms were separated from Vibrionaceae family and the new genus Campylobacter (means ‘curved rod’) under Campylobacteraceae family was proposed.