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105-583: The Carajás Mountains or Serra dos Carajás are a mountain range to the west of the municipality of Marabá in the Pará state of Brazil . Monte Redenção, Marabá's highest point, is located there. The mountains are contained in the Carajás National Forest , a 411,949 hectares (1,017,950 acres) sustainable use conservation unit created in 1998 that includes mining operations in a huge deposit of high-grade iron ore. This Pará , Brazil location article

210-785: A cultivar of the Kazakh dandelion ( Taraxacum kok-saghyz ) that is suitable for commercial production of natural rubber. In collaboration with Continental Tires , IME began a pilot facility. Many other plants produce forms of latex rich in isoprene polymers, though not all produce usable forms of polymer as easily as the Pará. Some of them require more elaborate processing to produce anything like usable rubber, and most are more difficult to tap. Some produce other desirable materials, for example gutta-percha ( Palaquium gutta ) and chicle from Manilkara species. Others that have been commercially exploited, or at least showed promise as rubber sources, include

315-447: A fiber, sometimes called 'elastic', had significant value to the textile industry because of its excellent elongation and recovery properties. For these purposes, manufactured rubber fiber was made as either an extruded round fiber or rectangular fibers cut into strips from extruded film. Because of its low dye acceptance, feel and appearance, the rubber fiber was either covered by yarn of another fiber or directly woven with other yarns into

420-510: A form of assisted biological coagulation. Little care is taken to exclude twigs, leaves, and even bark from the lumps that are formed, which may also include tree lace. Earth scrap is material that gathers around the base of the tree. It arises from latex overflowing from the cut and running down the bark, from rain flooding a collection cup containing latex, and from spillage from tappers' buckets during collection. It contains soil and other contaminants, and has variable rubber content, depending on

525-752: A given strain, thereby increasing the elastic force constant and making the rubber harder and less extensible. Raw rubber storage depots and rubber processing can produce malodour that is serious enough to become a source of complaints and protest to those living in the vicinity. Microbial impurities originate during the processing of block rubber. These impurities break down during storage or thermal degradation and produce volatile organic compounds. Examination of these compounds using gas chromatography / mass spectrometry (GC/MS) and gas chromatography (GC) indicates that they contain sulfur, ammonia, alkenes , ketones , esters , hydrogen sulfide , nitrogen, and low-molecular-weight fatty acids (C2–C5). When latex concentrate

630-515: A large stretch ratio and high resilience and also is buoyant and water-proof. Industrial demand for rubber-like materials began to outstrip natural rubber supplies by the end of the 19th century, leading to the synthesis of synthetic rubber in 1909 by chemical means. The major commercial source of natural rubber latex is the Amazonian rubber tree ( Hevea brasiliensis ), a member of the spurge family , Euphorbiaceae . Once native to Brazil,

735-476: A new cycle . This time, the cycle of Brazil nuts, which for years led the municipal economy. There was also the cycle of diamonds between 1920 and 1940, which were mainly found on the river Tocantins. With the discovery of Serra Pelada Maraba went through cycles of mining mostly the extraction of gold. Since the early 1970s installation of the Grande Carajás project and steel industries diversified and boosted

840-432: A petroleum refinery or other natural incineration processes, is sometimes used as an additive to rubber to improve its strength, especially in vehicle tires. During vulcanization, rubber's polyisoprene molecules (long chains of isoprene) are heated and cross-linked with molecular bonds to sulfur, forming a 3-D matrix. The optimal percentage of sulfur is approximately 10%. In this form, the polyisoprene molecules orientation

945-435: A point where it shares properties of both; i.e., if it is heated and cooled, it is degraded but not destroyed. The final properties of a rubber item depend not just on the polymer, but also on modifiers and fillers, such as carbon black , factice , whiting and others. Rubber particles are formed in the cytoplasm of specialized latex-producing cells called laticifers within rubber plants. Rubber particles are surrounded by

1050-543: A power plant that operated the base from burning wood. In November 1935 the local airport is opened and the first plane lands in this. Maraba in this period consists of 450 houses and 1.500 inhabitants fixed. With the construction of Highway PA-70, in 1969, Maraba is connected to the Belém-Brasília Highway . The implementation of road infrastructure was part of the Brazilian military government 's strategy to integrate

1155-451: A significant amount of rubber. Gloves (medical, household, and industrial) and toy balloons were large consumers of rubber, although the type of rubber used is concentrated latex. Significant tonnage of rubber was used as adhesives in many manufacturing industries and products, although the two most noticeable were the paper and the carpet industries. Rubber was commonly used to make rubber bands and pencil erasers . Rubber produced as

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1260-453: A single phospholipid membrane with hydrophobic tails pointed inward. The membrane allows biosynthetic proteins to be sequestered at the surface of the growing rubber particle, which allows new monomeric units to be added from outside the biomembrane, but within the lacticifer. The rubber particle is an enzymatically active entity that contains three layers of material, the rubber particle, a biomembrane and free monomeric units. The biomembrane

1365-551: A strategic business point for exchanging all kinds of products and services. The settlement of the river basin Itacaiunas played an important factor in shaping the city, because even though this region was later colonized by the Portuguese Empire in the sixteenth century, remained without a permanent settler occupation for almost 300 years. Only in 1894 is, in fact, the space was occupied by settlers. The first to participate in

1470-401: A wire that encircles the tree. This wire incorporates a spring so it can stretch as the tree grows. The latex is led into the cup by a galvanised "spout" knocked into the bark. Rubber tapping normally takes place early in the morning, when the internal pressure of the tree is highest. A good tapper can tap a tree every 20 seconds on a standard half-spiral system, and a common daily "task" size

1575-442: Is 25 cm (vertical) bark consumption per year. The latex-containing tubes in the bark ascend in a spiral to the right. For this reason, tapping cuts usually ascend to the left to cut more tubes. The trees drip latex for about four hours, stopping as latex coagulates naturally on the tapping cut, thus blocking the latex tubes in the bark. Tappers usually rest and have a meal after finishing their tapping work and then start collecting

1680-511: Is a stub . You can help Misplaced Pages by expanding it . Marab%C3%A1 Marabá is the fourth-most-populous municipality in the state of Pará, approximately 283,542 inhabitants according to the IBGE /2020, and the fourth largest GDP in the state of Pará, with US$ 1.543.254,34 according to the IDESP/2010. It's the main center of political, social, and economic development in southern of Pará and one of

1785-418: Is a natural polymer of isoprene (polyisoprene), and an elastomer (a stretchy polymer). Polymers are simply chains of molecules that can be linked together. Rubber is one of the few naturally occurring polymers and prized for its high stretch ratio, resilience, and water-proof properties. Other examples of natural polymers include tortoise shell , amber , and animal horn . When harvested, latex rubber takes

1890-532: Is a sticky, milky and white colloid drawn off by making incisions in the bark and collecting the fluid in vessels in a process called "tapping". The latex then is refined into the rubber that is ready for commercial processing. In major areas, latex is allowed to coagulate in the collection cup. The coagulated lumps are collected and processed into dry forms for sale. Natural rubber is used extensively in many applications and products, either alone or in combination with other materials. In most of its useful forms, it has

1995-460: Is a very powerful and comes with high rates of growth. This is because the strategy of state government, to decentralize services from the state capital, Belém . The city is increasingly gaining representation in hosting numerous public institutions. The trade of the city is highlighted, because the city is a major regional commercial hub of South and Southeast of Pará. Marabá is served by João Correa da Rocha Airport . Bordered by two major rivers,

2100-415: Is between 450 and 650 trees. Trees are usually tapped on alternate or third days, although many variations in timing, length and number of cuts are used. "Tappers would make a slash in the bark with a small hatchet. These slanting cuts allowed latex to flow from ducts located on the exterior or the inner layer of bark ( cambium ) of the tree. Since the cambium controls the growth of the tree, growth stops if it

2205-412: Is close to the municipal seat of Marabá, belonging to the municipality of Bom Jesus do Tocantins. Marabá is located in a low altitude area in the connexion of two rivers - Itacaiúnas and Tocantins - and suffers from annual floods due to the topography and direct influence of four rivers: Itacaiunas, Tocantins, Tauarizinho and Sororó . In addition to the basins related to these rivers, the municipality

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2310-491: Is cut. Thus, rubber tapping demanded accuracy, so that the incisions would not be too many given the size of the tree, or too deep, which could stunt its growth or kill it." It is usual to tap a panel at least twice, sometimes three times, during the tree's life. The economic life of the tree depends on how well the tapping is carried out, as the critical factor is bark consumption. A standard in Malaysia for alternate daily tapping

2415-438: Is held tightly to the rubber core by the high negative charge along the double bonds of the rubber polymer backbone. Free monomeric units and conjugated proteins make up the outer layer. The rubber precursor is isopentenyl pyrophosphate (an allylic compound), which elongates by Mg -dependent condensation by the action of rubber transferase. The monomer adds to the pyrophosphate end of the growing polymer. The process displaces

2520-513: Is inserted in the basins of the rivers Aquiri, Tapirape, Gray, Black, Parauapebas and Red. Of these, the basins of the Tapirapé, Cinzento and Preto rivers are included totally in the area of the municipality. The basin of Itacaiúnas stands out for bathing the whole municipality, in whose mouth is the municipal headquarters of Marabá and covers the largest area, that is, 5,383.4 km². The municipality of Maraba experienced various economic cycles. Until

2625-598: Is located in Piazza San Felix, in the central city Palace built in the 1930s, which served as the seat of legislative power and the judicial power of the municipality. Today it is a museum. The Municipal Museum is installed at the Foundation House of Culture of Maraba and includes the following sectors: Division of Anthropology , Department of Botany , Department of Geology , Department of Archaeology and Department of Zoology . In addition to host school of Music,

2730-556: Is low and strain results from small changes of bond lengths and angles: this caused the Challenger disaster , when the American Space Shuttle 's flattened o-rings failed to relax to fill a widening gap. The glass transition is fast and reversible: the force resumes on heating. The parallel chains of stretched rubber are susceptible to crystallization. This takes some time because turns of twisted chains have to move out of

2835-402: Is marketed in different Brazilian regions and abroad. The herd area is highlighted by its superior quality, being one of the most important cattle herds of the state, a result arising from the use of advanced technology in the selection and fertilization. It has also herds of pigs, horses, sheep and poultry The fishing sector also has a key role in local economic base by exporting its surplus for

2940-892: Is not cultivated widely in its native continent of South America because of the South American leaf blight , and other natural predators there. Rubber latex is extracted from rubber trees. The economic life of rubber trees in plantations is around 32 years, with up to 7 years being an immature phase and about 25 years of productive phase. The soil requirement is well-drained, weathered soil consisting of laterite , lateritic types, sedimentary types, nonlateritic red or alluvial soils. The climatic conditions for optimum growth of rubber trees are: Many high-yielding clones have been developed for commercial planting. These clones yield more than 2,000 kilograms per hectare (1,800 lb/acre) of dry rubber per year, under ideal conditions. Rubber production has been linked to deforestation. Rubber therefore

3045-582: Is one of seven commodities included in the 2023 EU Regulation on Deforestation-free products (EUDR), which aims to guarantee that the products European Union (EU) citizens consume do not contribute to deforestation or forest degradation worldwide. In places such as Kerala and Sri Lanka, where coconuts are in abundance, the half shell of coconut was used as the latex collection container. Glazed pottery or aluminium or plastic cups became more common in Kerala-India and other countries. The cups are supported by

3150-449: Is produced by smallholders, who collect rubber from trees far from the nearest factory. Many Indonesian smallholders, who farm paddies in remote areas, tap dispersed trees on their way to work in the paddy fields and collect the latex (or the coagulated latex) on their way home. As it is often impossible to preserve the latex sufficiently to get it to a factory that processes latex in time for it to be used to make high quality products, and as

3255-529: Is produced from rubber, sulfuric acid is used for coagulation. This produces malodourous hydrogen sulfide. The industry can mitigate these bad odours with scrubber systems . Rubber is the polymer cis-1,4-polyisoprene – with a molecular weight of 100,000 to 1,000,000 daltons . Typically, a small percentage (up to 5% of dry mass) of other materials, such as proteins , fatty acids , resins , and inorganic materials (salts) are found in natural rubber. Polyisoprene can also be created synthetically, producing what

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3360-553: Is sometimes applied to the tree-obtained version of natural rubber in order to distinguish it from the synthetic version. The first use of rubber was by the indigenous cultures of Mesoamerica . The earliest archeological evidence of the use of natural latex from the Hevea tree comes from the Olmec culture, in which rubber was first used for making balls for the Mesoamerican ballgame . Rubber

3465-402: Is sometimes referred to as "synthetic natural rubber", but the synthetic and natural routes are distinct. Some natural rubber sources, such as gutta-percha , are composed of trans-1,4-polyisoprene, a structural isomer that has similar properties. Natural rubber is an elastomer and a thermoplastic . Once the rubber is vulcanized, it is a thermoset . Most rubber in everyday use is vulcanized to

3570-472: Is still random but they become aligned when the rubber is stretched. This sulfur vulcanization makes the rubber stronger and more rigid, but still very elastic. And through the vulcanization process, the sulfur and latex are meant to be totally used up in individual form. Natural rubber latex is shipped from factories in Southeast Asia , South America , and West and Central Africa to destinations around

3675-573: The Amazon region to the rest of the country. All this was part of the integration strategy of the Amazon territory, especially the region of Marabá, where was undertaken mainly the official plan of agricultural colonization, the construction of the Tucuruí Hydroelectric Power , the implementation of "Projeto Grande Carajás" ( Greater Carajas Project ), and even the discovery of large gold deposits of

3780-511: The Carajás Railway , which has Marabá as center of operations; in 1988 and come into operation the first two steel mills for the production of pig iron . In 1987 there was a conflict that became known as the Massacre of St. Boniface. The battle took place between the miners of Serra Pelada and the battalion of the "Polícia Militar" (Military Police of the state of Pará ), with the support of

3885-496: The Mullins effect and the Payne effect and is often modeled as hyperelastic . Rubber strain crystallizes . Because there are weakened allylic C-H bonds in each repeat unit , natural rubber is susceptible to vulcanisation as well as being sensitive to ozone cracking . The two main solvents for rubber are turpentine and naphtha (petroleum). Because rubber does not dissolve easily,

3990-697: The Putumayo genocide . Between the 1880s–1913 Julio César Arana and his company that would become the Peruvian Amazon Company controlled the Putumayo river. W.E. Hardenburg, Benjamin Saldaña Rocca and Roger Casement were influential figures in exposing these atrocities. Roger Casement was also prominent in revealing the Congo atrocities to the world. Days before entering Iquitos by boat Casement wrote "'Caoutchouc

4095-585: The Serra Pelada . All these projects were centered in Marabá, and contributed to the economic and population boom that occurred in the city between 1970 and 1980. In 1970 the city was declared a National Security Area (legal position allowing direct intervention of the Brazilian central government), a condition that lasted until the end of the Brazilian military dictatorship in 1985. Besides having strategic importance to

4200-557: The cytosol . In plants, isoprene pyrophosphate can also be obtained from the 1-deox-D-xyulose-5-phosphate/2-C-methyl-D-erythritol-4-phosphate pathway within plasmids. The relative ratio of the farnesyl pyrophosphate initiator unit and isoprenyl pyrophosphate elongation monomer determines the rate of new particle synthesis versus elongation of existing particles. Though rubber is known to be produced by only one enzyme, extracts of latex host numerous small molecular weight proteins with unknown function. The proteins possibly serve as cofactors, as

4305-522: The 99,271 hectares (245,300 acres) Tapirapé Biological Reserve , a strictly protected conservation unit created in 1989. In 2008, the industrial park of Marabá reaches its peak with the onset of steel production, declining in the same year due to the Great Recession that has hit the European , American and Chinese markets , which were the targets of local production. The crisis greatly affected

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4410-452: The Académie (published in 1755) that described many of rubber's properties. This has been referred to as the first scientific paper on rubber. In England, Joseph Priestley , in 1770, observed that a piece of the material was extremely good for rubbing off pencil marks on paper, hence the name "rubber". It slowly made its way around England. In 1764, François Fresnau discovered that turpentine

4515-533: The Brazilian Army. The event that preceded the massacre was blocking access to the Mixed Bridge of Marabá , in demonstration of the reopening of Serra Pelada mine and the lowering of the mining pit. A Police battalion was sent to unlock the bridge, but on reaching the spot shot with firearms against protesters to force their withdrawal. Officially nine people died in the conflict. The municipality contains part of

4620-493: The Carajas iron ore, exploited by the mining company Vale. Metallurgical Industries and intense livestock activity, accounted for a large environmental devastation in the region. The activity of the steel industry requires large amounts of coal, leading to a devastation of native forests. As a result of public pressure the industries were forced to change its production model, investing in reforestation and charcoal production through

4725-600: The Congo Free State for more information on the rubber trade in the Congo Free State in the late 1800s and early 1900s.) The rubber boom in the Amazon also similarly affected indigenous populations to varying degrees. Correrias, or slave raids were frequent in Colombia, Peru and Bolivia where many were either captured or killed. The most well known case of atrocities generated from rubber extraction in South America came from

4830-606: The President of the Province of Grão-Pará. In subsequent years the migratory flow to the region of Marabá increased considerably. During the 1920s, immigrants moved to Maraba mainly to participate in the extraction and sale of Brazil nuts, andiroba , copaiba oils and rubber. And from the 1930s moved to Maraba, in order to work in the diamond mines that were on the banks of the Tocantins River. In 1929, Marabá becomes illuminated by

4935-447: The Tocantins River rose 17.42 meters. As a result, there was a redesign of the city's expansion, with the construction of urban areas planned of the "Cidade Nova" (New City) and "Nova Marabá" (New Marabá), to the detriment of traditional urban area of the "Velha Marabá" (Old Marabá). New urban areas have also emerged over the decade, highlighting the "São Félix" (St. Félix) and the "Morada Nova" (New Morada). In 1984, comes into operation

5040-409: The amount of contaminants. Earth scrap is collected by field workers two or three times a year and may be cleaned in a scrap-washer to recover the rubber, or sold to a contractor who cleans it and recovers the rubber. It is of low quality. Latex coagulates in the cups if kept for long and must be collected before this happens. The collected latex, "field latex", is transferred into coagulation tanks for

5145-682: The anthropic forests predominate. Because of its diverse nature, the municipality holds one of the largest natural heritage sites in Brazil, housing large forest reserves such as the Tapirapé Biological Reserve , with 103,000 ha (1,030 km²), and the Tapirapé-Aquiri National Forest with 190,000 hectares ha (1,900 km²), in addition to the Mãe Maria Indigenous Land, with 64,488,416 ha (644.88 km²), which

5250-566: The area offers tourism opportunities to residents and visitors, such as Tucunaré beach (Praia do Tucunaré), Municipal Museum, Orla do Rio, Povoado de Mumbuca, Carajas National Forest (Floresta Nacional De Carajas). The Beach Peacock Bass is the most visited tourist spot in town. Emerging from the ebb of the Tocantins River , just after the rainy season the beach occupies an area of approximately 5 km ², of which three quarters are of fine sand and one quarter of vegetation. Situated opposite

5355-412: The babassu coconut palm. Besides, to have more than 200 industries, and the steel (pig iron) most important, second is the timber industry and the manufacture of tiles and bricks. The city's economy also relies on the production of manganese and Agribusiness . In Maraba, Agribusiness works with pulp processing, cassava flour, rice processing, milk and palm . The installation of steel plant came boost

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5460-591: The bases for military operations troops of the Brazilian Armed Forces . In 1970 it launched the "Programa de Integração Nacional" (National Integration Program), which, among other things, provided for the construction of the Trans-Amazon Highway , whose first section opened in 1971, along with the creation of a post of the National Institute of Colonization and Agrarian Reform in Marabá. With

5565-505: The central region of Maraba, the sands of the island are sighted in mid-April, but their high season is in July, making it the main attraction of the city. The beach provides vacationers, practice water sports and sandy, camping, fishing, and various attractions promoted by the Municipality. Located opposite the district of São Félix, also appears in the summer with the decrease in the level of

5670-440: The collection of taxes and other local businesses, forcing layoffs and major disruptions of projects and investments. The effects in industrial park of Marabá were very large, forcing the closure of 10 of the 11 steel-metallurgical industries. The city's economy is slowly recovering, with the reopening of some steel mills since 2013. In 2011, Marabá actively participated in all of southeast Pará plebiscite on division that defined

5775-465: The colonization of the territory of Marabá, in 1894, were the political leaders who had escaped from political guerrillas in the northern Province of Goiás , specifically the city of Boa Vista . One of those leaders was Carlos Leitao, who traveled with his group to the southeast of the province of Grão-Pará and established its first camp in downstream Itacaiunas River, in December 1894. A definitive village

5880-537: The completion of construction of the Trans-Amazon Highway, the flow of immigrants towards Maraba became very large, and in less than a decade the city has been radically transformed, from a small urban center on the banks of the Tocantins River (in Maraba time had only 20,000 inhabitants), a main city in the region with over 100,000 inhabitants. In 1980 the city was devastated by the biggest flood in its history, when

5985-573: The death of Colonel Carlos Leitão in 1903, the village of Burgo's Itacayúna is disabled and Leitão family along with other residents move to the village of Pontal do Itacayúna. In 1904 the village of the Pontal shall be called "Marabá" and host the borough, with the installation of the police detachment. The economy of the village of Marabá grew considerably supported by the extractive base, anchored in exports of rubber and Brazil-nut to U.S. and European markets. The economic importance gained, influenced

6090-407: The dry rubber produced. Latex that drips onto the ground, "earth scrap", is also collected periodically for processing of low-grade product. Cup lump is the coagulated material found in the collection cup when the tapper next visits the tree to tap it again. It arises from latex clinging to the walls of the cup after the latex was last poured into the bucket, and from late-dripping latex exuded before

6195-654: The early 1900s, the Congo Free State in Africa was also a significant source of natural rubber latex, mostly gathered by forced labor . King Leopold II's colonial state brutally enforced production quotas due to the high price of natural rubber at the time. Tactics to enforce the rubber quotas included removing the hands of victims to prove they had been killed. Soldiers often came back from raids with baskets full of chopped-off hands. Villages that resisted were razed to encourage better compliance locally. (See Atrocities in

6300-459: The early 1980s economy was based on the extraction plant. At first revolved around the extraction of latex rubber , whose lucrative attracted large numbers of the Northeast . Since the late nineteenth century (1892) until the late 1940s, was marked by the extraction of the rubber boom that has contributed greatly to the economy of the city and the region, however, the rubber crisis led the council to

6405-472: The entire north and northeast. Agriculture is diversified, with production cereals, pulses and oilseeds such as corn, rice and beans, fruits such as bananas and acai , and logging Through the Industrial Development Company of Para - CDI, was installed at the end of the eighties, in an area of 1,300 hectares, the industrial district of Maraba - DIM, to create the base of a steel pole targeting

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6510-421: The export of seeds or plants. In 1876, Henry Wickham smuggled 70,000 Amazonian rubber tree seeds from Brazil and delivered them to Kew Gardens , England. Only 2,400 of these germinated. Seedlings were then sent to India , British Ceylon ( Sri Lanka ), Dutch East Indies ( Indonesia ), Singapore , and British Malaya . Malaya (now Peninsular Malaysia ) was later to become the biggest producer of rubber. In

6615-482: The extraction of rubber in small colony of Burgo's Itacayúna and its surroundings. Immediately there is the first population explosion of the locality where the rubber tappers, fishermen and hunters settle in the village of Burgo. The merchant Francisco Coelho da Silva would have been the first to settle in the area downstream of Rio Itacaiunas, crucial to the foundation of the village of "Pontal do Itacayúna" (Pontal of Itacayúna). The goal of Francisco Silva, while riding

6720-636: The fabric. Rubber yarns were used in foundation garments. While rubber is still used in textile manufacturing, its low tenacity limits its use in lightweight garments because latex lacks resistance to oxidizing agents and is damaged by aging, sunlight, oil and perspiration. The textile industry turned to neoprene (polymer of chloroprene ), a type of synthetic rubber, as well as another more commonly used elastomer fiber, spandex (also known as elastane), because of their superiority to rubber in both strength and durability. Rubber exhibits unique physical and chemical properties. Rubber's stress–strain behavior exhibits

6825-477: The first technique for tapping trees for latex without causing serious harm to the tree. Because of his fervent promotion of this crop, he is popularly remembered by the nickname "Mad Ridley". Before World War II significant uses included door and window profiles, hoses, belts, gaskets, matting , flooring, and dampeners (antivibration mounts) for the automotive industry. The use of rubber in car tires (initially solid rather than pneumatic) in particular consumed

6930-544: The form of latex, an opaque, white, milky suspension of rubber particles in water. It is then transformed through industrial processes to the solid form widely seen in manufactured goods. Natural rubber is reactive and vulnerable to oxidization, but it can be stabilized through a heating process called vulcanization. Vulcanization is a process by which the rubber is heated and sulfur , peroxide , or bisphenol are added to improve resistance and elasticity and to prevent it from oxidizing. Carbon black , which can be derived from

7035-630: The framework of research, rescue, environmental and historical preservation. Águia de Marabá Futebol Clube , the city's principal football club won the state championship in 2010 and reached the Copa do Brasil semi-finals in 2009. In 2010, it placed 8th on the National Championship's Serie C. Maraba is subdivided into six urban centers: Rubber Rubber , also called India rubber , latex , Amazonian rubber , caucho , or caoutchouc , as initially produced, consists of polymers of

7140-459: The higher-grade, technically specified block rubbers such as SVR 3L or SVR CV or used to produce Ribbed Smoke Sheet grades. Naturally coagulated rubber (cup lump) is used in the manufacture of TSR10 and TSR20 grade rubbers. Processing for these grades is a size reduction and cleaning process to remove contamination and prepare the material for the final stage of drying. The dried material is then baled and palletized for storage and shipment. Rubber

7245-431: The international market spot price of a seemingly more profitable crop (for example palm oil ) surges in relation to rubber. For instance, during the 2020 and 2021 international COVID-19 pandemic , demand for rubber gloves surged, leading to a spike in rubber prices of about 30%. In addition to the pandemic, demand exceeded supply in part because long term plantations had been torn out and replaced with other crops over

7350-402: The latex would anyway have coagulated by the time it reached the factory, the smallholder will coagulate it by any means available, in any container available. Some smallholders use small containers, buckets etc., but often the latex is coagulated in holes in the ground, which are usually lined with plastic sheeting. Acidic materials and fermented fruit juices are used to coagulate the latex –

7455-434: The latex-carrying vessels of the tree become blocked. It is of higher purity and of greater value than the other three types. 'Cup lumps' can also be used to describe a completely different type of coagulate that has collected in smallholder plantations over a period of 1–2 weeks. After tapping all of the trees, the tapper will return to each tree and stir in some type of acid, which allows the newly harvested latex to mix with

7560-416: The latex. There is growing concern for the future supply of rubber due to various factors, including plant disease, climate change, and the volatile market price of rubber. Producers of natural rubber are mostly small family-held plantations, often serving large industrial aggregators. High volatility in the price of rubber affects rubber plantation investment, and farmers may remove their rubber trees if

7665-443: The liquid "field latex" at about midday. The four types of field coagula are "cuplump", "treelace", "smallholders' lump", and "earth scrap". Each has significantly different properties. Some trees continue to drip after the collection leading to a small amount of "cup lump" that is collected at the next tapping. The latex that coagulates on the cut is also collected as "tree lace". Tree lace and cup lump together account for 10%–20% of

7770-552: The local economy even more, forming a metal pole-mechanical, with a view to verticalize the local mineral production. There are still projects that seen during and after the installation of steel works, among them: The gas pipeline Açailândia-Maraba and construction of new port city. The trade and services sector also has its share of contribution. Maraba has approximately 5 000 outlets divided between trade formed by micro, small, medium and large businesses and services, Hospital, Financial, Education, Construction and Public Utilities. It

7875-413: The local economy. Today, Maraba is the economic center and a vast administrative region of the Amazon agricultural frontier ", the city has one of the most significant economic growth in the country. Livestock based on cattle ranching is an activity of great importance for the municipality, and ensure the livelihoods of the population, provides the regional and local development by creating large scale, and

7980-399: The material is finely divided by shredding prior to its immersion. An ammonia solution can be used to prevent the coagulation of raw latex. Rubber begins to melt at approximately 180 °C (356 °F). On a microscopic scale, relaxed rubber is a disorganized cluster of erratically changing wrinkled chains. In stretched rubber, the chains are almost linear. The restoring force is due to

8085-402: The meaning of the town's nickname: "Son of Miscegenation." The word "Marabá" derives from the indigenous vocable "Mayr-Abá", which simply means "son of the indigenous woman with a white man ." A poem written by poet Gonçalves Dias inspired by the merchant Francisco Silva to its commercial name of "Casa Marabá" (Maraba House). This was located the banks of the Tocantins River, and served as

8190-454: The morphostructural unit denominated Peripheral Depression of the South of Pará, where they dominate the amazonian plateaus. The vegetation cover of the municipality of Marabá is quite diverse. The fitofisionomy of the forests of the municipality of Marabá is characterized by three types: the open ombrophylous forest, the dense ombrophylous forest and the anthropic areas. In the urban area of Marabá,

8295-461: The most dynamic municipalities in Brazil. Marabá has a strategic position and is crossed by five highways. It also has a large logistics infrastructure, with a port, airport, and railway. The municipality has a growing industrial park. The steel industry is especially important to Marabá's vast agricultural frontier. Marabá also has a strong trade and services sector. Marabá is characterized by its broad mix of peoples and cultures that do justice to

8400-505: The municipal public archives, the Museum makes several studies on the region southeast of Pará, rescuing and preserving local history. The museum has the support and guidance of the Goeldi Museum , in relation to the training of technicians and identification of the material through an agreement with the institution. The Municipal Museum of Maraba is one of Brazil's most respected institutions in

8505-547: The one of greater size. However, it is in the Serra do Cinzento that the maximum altitude of the municipality of Marabá is found, with 792 meters. The Carajás, Cinzento and Buritirana mountains are located in conservation areas, under federal jurisdiction, called the Tapirapé-Aquiri National Forest ( 196,504 hectares (485,570 acres) sustainable use conservation unit created in 1989. ) and the Tapirapé Biological Reserve , where several caves are found. Its forms of relief are encompassed by

8610-410: The organic compound isoprene , with minor impurities of other organic compounds. Thailand , Malaysia , Indonesia , and Cambodia are four of the leading rubber producers. Types of polyisoprene that are used as natural rubbers are classified as elastomers . Currently, rubber is harvested mainly in the form of the latex from the Pará rubber tree ( Hevea brasiliensis ) or others. The latex

8715-561: The plantation expanded to Karnataka , Tamil Nadu and the Andaman and Nicobar Islands of India. Today, India is the world's 3rd largest producer and 4th largest consumer of rubber. In Singapore and Malaya, commercial production was heavily promoted by Sir Henry Nicholas Ridley , who served as the first Scientific Director of the Singapore Botanic Gardens from 1888 to 1911. He distributed rubber seeds to many planters and developed

8820-545: The policy of national integration, Marabá region was the only region of Brazil where there was fighting between the army and the guerrillas of the PCdoB party who want to topple the military regime and establish a communist regime in Brazil. Then performed an Araguaia guerrilla movement, which forced the Brazilian government to Marabá to send a large contingent of troops of the Brazilian Army . The city has become since then one of

8925-454: The political aspects, so that in the years 1908 to 1909 a major rebellion occurred in Maraba, called of "Revolta dos Galegos" (Revolt of the Galicians). The rebellion was demanding political autonomy from the county of Baião , and the low prices paid for rubber and the highest interest rate on loans for collecting nuts and rubber. Retaliating against the rebellion of Maraba the government of

9030-589: The preparation of dry rubber or transferred into air-tight containers with sieving for ammoniation. Ammoniation, invented by patent lawyer and vice-president of the United States Rubber Company Ernest Hopkinson around 1920, preserves the latex in a colloidal state for longer periods of time. Latex is generally processed into either latex concentrate for manufacture of dipped goods or coagulated under controlled, clean conditions using formic acid. The coagulated latex can then be processed into

9135-400: The preponderance of wrinkled conformations over more linear ones. For the quantitative treatment see ideal chain , for more examples see entropic force . Cooling below the glass transition temperature permits local conformational changes but a reordering is practically impossible because of the larger energy barrier for the concerted movement of longer chains. "Frozen" rubber's elasticity

9240-422: The previously coagulated material. The rubber/acid mixture is what gives rubber plantations, markets, and factories a strong odor. Tree lace is the coagulum strip that the tapper peels off the previous cut before making a new cut. It usually has higher copper and manganese contents than cup lump. Both copper and manganese are pro-oxidants and can damage the physical properties of the dry rubber. Smallholders' lump

9345-445: The province of Grão-Pará does not meet demands by emancipation. However the enormous pressure and influence of the local society has made the provincial government gave in and finally initiate negotiations for the creation of the municipality of Marabá. That culminated on February 27, 1913 Maraba achieved political autonomy and became a municipality. The first mayor of Maraba was the military Antonio Maia, who took office as appointed by

9450-404: The river Tocantins. The rail and road bridge over the river Tocantins has been used to transport the ore extracted from the Serra dos Carajás. It was the first chapel built in Maraba. The first building was destroyed by the flooding of rivers in 1926, then another church was erected on the same site. It is the first historical heritage of the city, officially recognized on April 5, 1993. The church

9555-420: The rubber fig ( Ficus elastica ), Panama rubber tree ( Castilla elastica ), various spurges ( Euphorbia spp.), lettuce ( Lactuca species), the related Scorzonera tau-saghyz , various Taraxacum species, including common dandelion ( Taraxacum officinale ) and Kazakh dandelion, and, perhaps most importantly for its hypoallergenic properties, guayule ( Parthenium argentatum ). The term gum rubber

9660-566: The same quality as the natural rubber from rubber trees . In the wild types of dandelion, latex content is low and varies greatly. In Nazi Germany , research projects tried to use dandelions as a base for rubber production, but failed. In 2013, by inhibiting one key enzyme and using modern cultivation methods and optimization techniques, scientists in the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Germany developed

9765-562: The south); Bom Jesus do Tocantins , São João do Araguaia and São Domingos do Araguaia (to the east); and São Félix do Xingu (to the west). The topography of the municipality of Marabá presents the highest altitudes in the Southeast region of Pará, through the Carajás , Sereno, Buritirama, Paredão, Encontro, Gray and Misteriosa mountains. Of this complex, stands out the Carajás mountain range, like

9870-454: The species is now pan-tropical. This species is preferred because it grows well under cultivation. A properly managed tree responds to wounding by producing more latex for several years. Congo rubber , formerly a major source of rubber, which motivated the atrocities in the Congo Free State , came from vines in the genus Landolphia ( L. kirkii , L. heudelotis , and L. owariensis ). Dandelion milk contains latex. The latex exhibits

9975-420: The state of Pará. Marabá established itself during the process as the center of discussions in the region about the project division, to be the leading candidate to be state capital of Carajás . The plebiscite took place on December 11, 2011. Municipality at 93.26% of the votes were in favor of establishing Carajás. Occupying an area of 15,092,268 km², Marabá counts, in 2017, with 271,594 inhabitants, being

10080-564: The synthetic rate decreases with complete removal. More than 28 million tons of rubber were produced in 2017, of which approximately 47% was natural. Since the bulk is synthetic, which is derived from petroleum, the price of natural rubber is determined, to a large extent, by the prevailing global price of crude oil. Asia was the main source of natural rubber, accounting for about 90% of output in 2021. The three largest producers, Thailand , Indonesia, and Malaysia, together account for around 72% of all natural rubber production. Natural rubber

10185-510: The tenth most populous municipality of the North region of Brazil. The municipal seat has the following geographical coordinates: 05º 21 '54 "South latitude and 049º 07' 24" longitude WGr. Located in southeastern Pará, in the Marabá microregion, it is bordered by the municipalities of: Novo Repartimento , Itupiranga , Nova Ipixuna and Rondon do Pará (to the north); São Geraldo do Araguaia , Eldorado dos Carajás , Curionópolis and Parauapebas (to

10290-435: The terminal high-energy pyrophosphate. The reaction produces a cis polymer. The initiation step is catalyzed by prenyltransferase , which converts three monomers of isopentenyl pyrophosphate into farnesyl pyrophosphate . The farnesyl pyrophosphate can bind to rubber transferase to elongate a new rubber polymer. The required isopentenyl pyrophosphate is obtained from the mevalonate pathway, which derives from acetyl-CoA in

10395-437: The village of Pontal of Itacayúna, was to negotiate with the rubber tappers who sought to sell the rubber collected in the region. The official historiography Francisco Silva assigns the authorship of the current name of the city. He had installed in the village of Pontal of Itacayúna a commercial point called "Casa Marabá" (House Marabá), which years later would be used to name the until then village Pontal of Itacayúna. With

10500-453: The way of the growing crystallites . Crystallization has occurred, for example, when, after days, an inflated toy balloon is found withered at a relatively large remaining volume. Where it is touched, it shrinks because the temperature of the hand is enough to melt the crystals. Vulcanization of rubber creates di- and polysulfide bonds between chains, which limits the degrees of freedom and results in chains that tighten more quickly for

10605-442: The world. As the cost of natural rubber has risen significantly and rubber products are dense, the shipping methods offering the lowest cost per unit weight are preferred. Depending on destination, warehouse availability, and transportation conditions, some methods are preferred by certain buyers. In international trade, latex rubber is mostly shipped in 20-foot ocean containers. Inside the container, smaller containers are used to store

10710-468: Was a rubber solvent . Giovanni Fabbroni is credited with the discovery of naphtha as a rubber solvent in 1779. Charles Goodyear redeveloped vulcanization in 1839, although Mesoamericans had used stabilized rubber for balls and other objects as early as 1600 BC. South America remained the main source of latex rubber used during much of the 19th century. The rubber trade was heavily controlled by business interests but no laws expressly prohibited

10815-631: Was established on the left bank of the Tocantins River, about 10 km downstream from the other camp, the place that Carlos Leitao called "Burgo do Itacayúna" (Burgo's Itacayúna). After a few months, the extraction of rubber latex began in the "Burgo's Itacayúna" region. In 1895 Carlos Gomes Leitão asks the President of the Province of Grão-Pará , José Paes de Carvalho, funding for the extraction and commercialization of rubber in addition to getting drugs to be used specifically to combat tropical diseases . To get funding, Carlos Leitão disseminating information on

10920-736: Was first called 'india rubber,' because it came from the Indies, and the earliest European use of it was to rub out or erase. It is now called India rubber because it rubs out or erases the Indians." In India , commercial cultivation was introduced by British planters, although the experimental efforts to grow rubber on a commercial scale were initiated as early as 1873 at the Calcutta Botanical Garden . The first commercial Hevea plantations were established at Thattekadu in Kerala in 1902. In later years

11025-518: Was later used by the Maya and Aztec cultures: in addition to making balls, Aztecs used rubber for other purposes, such as making containers and to make textiles waterproof by impregnating them with the latex sap. Charles Marie de La Condamine is credited with introducing samples of rubber to the Académie Royale des Sciences of France in 1736. In 1751, he presented a paper by François Fresneau to

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