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105-519: Amol County ( Persian : شهرستان آمل ) is in Mazandaran province, Iran . Its capital is the city of Amol . After the 2006 National Census, Dasht-e Sar-e Sofla Rural District was created in the Central District . Bala Khiyaban-e Litkuh and Chelav Rural Districts were separated from it in the formation of Emamzadeh Abdollah District . After the 2011 census, the village of Emamzadeh Abdollah

210-519: A reducing agent , as indicated by its ability to reduce sulfur dioxide in the Claus process . Hydrogen sulfide burns in oxygen with a blue flame to form sulfur dioxide ( SO 2 ) and water : If an excess of oxygen is present, sulfur trioxide ( SO 3 ) is formed, which quickly hydrates to sulfuric acid : It is slightly soluble in water and acts as a weak acid ( p K a  = 6.9 in 0.01–0.1 mol/litre solutions at 18 °C), giving

315-514: A signalling molecule . Hydrogen sulfide is often produced from the microbial breakdown of organic matter in the absence of oxygen, such as in swamps and sewers; this process is commonly known as anaerobic digestion , which is done by sulfate-reducing microorganisms . It also occurs in volcanic gases , natural gas deposits, and sometimes in well-drawn water. Hydrogen sulfide is slightly denser than air. A mixture of H 2 S and air can be explosive. In general, hydrogen sulfide acts as

420-638: A Dari dialect. In the 19th century, under the Qajar dynasty , the dialect that is spoken in Tehran rose to prominence. There was still substantial Arabic vocabulary, but many of these words have been integrated into Persian phonology and grammar. In addition, under the Qajar rule, numerous Russian , French , and English terms entered the Persian language, especially vocabulary related to technology. The first official attentions to

525-435: A city. At the time of the 2006 census, the county's population was 343,747 in 93,194 households. The following census in 2011 counted 370,774 people in 112,297 households. The 2016 census measured the population of the county as 401,639 in 133,034 households. Amol County's population history and administrative structure over three consecutive censuses are shown in the following table. Amol's neighbour counties are Babol in

630-418: A dictionary called Words of Scientific Association ( لغت انجمن علمی ), which was completed in the future and renamed Katouzian Dictionary ( فرهنگ کاتوزیان ). The first academy for the Persian language was founded on 20 May 1935, under the name Academy of Iran . It was established by the initiative of Reza Shah Pahlavi , and mainly by Hekmat e Shirazi and Mohammad Ali Foroughi , all prominent names in

735-472: A few weeks. Long-term, low-level exposure may result in fatigue , loss of appetite, headaches , irritability, poor memory, and dizziness . Chronic exposure to low level H 2 S (around 2 ppm ) has been implicated in increased miscarriage and reproductive health issues among Russian and Finnish wood pulp workers, but the reports have not (as of 1995) been replicated. Short-term, high-level exposure can induce immediate collapse, with loss of breathing and

840-857: A high probability of death. If death does not occur, high exposure to hydrogen sulfide can lead to cortical pseudolaminar necrosis , degeneration of the basal ganglia and cerebral edema . Although respiratory paralysis may be immediate, it can also be delayed up to 72 hours. Inhalation of H 2 S resulted in about 7 workplace deaths per year in the U.S. (2011–2017 data), second only to carbon monoxide (17 deaths per year) for workplace chemical inhalation deaths. Treatment involves immediate inhalation of amyl nitrite , injections of sodium nitrite , or administration of 4-dimethylaminophenol in combination with inhalation of pure oxygen, administration of bronchodilators to overcome eventual bronchospasm , and in some cases hyperbaric oxygen therapy (HBOT). HBOT has clinical and anecdotal support. Hydrogen sulfide

945-500: A language name is first attested in English in the mid-16th century. Farsi , which is the Persian word for the Persian language, has also been used widely in English in recent decades, more often to refer to Iran's standard Persian. However, the name Persian is still more widely used. The Academy of Persian Language and Literature has maintained that the endonym Farsi is to be avoided in foreign languages, and that Persian

1050-417: A literary language considerably different from the spoken Persian of the time. This became the basis of what is now known as "Contemporary Standard Persian". There are three standard varieties of modern Persian: All these three varieties are based on the classic Persian literature and its literary tradition. There are also several local dialects from Iran, Afghanistan and Tajikistan which slightly differ from

1155-466: A major part of the economy in and around Amol. Amol is the economic center of Mazandaran province, with Agriculture , Industrial factories and Tourism being the base of the Amol economy. Rice , grain , fruits , cotton , tea , sugarcane , and silk are produced in the lowland. Mineral water , meat , dairy , wood and ingots are the main manufacturing industry. Amol has extensive human relations in

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1260-529: A period of several centuries, Ottoman Turkish (which was highly Persianised itself) had developed toward a fully accepted language of literature, and which was even able to lexically satisfy the demands of a scientific presentation. However, the number of Persian and Arabic loanwords contained in those works increased at times up to 88%. In the Ottoman Empire, Persian was used at the royal court, for diplomacy, poetry, historiographical works, literary works, and

1365-447: A presence of a catalyst under atmospheric pressure around 1200 °C into hydrogen and sulfur. Hydrogen sulfide reacts with metal ions to form metal sulfides, which are insoluble, often dark colored solids. Lead(II) acetate paper is used to detect hydrogen sulfide because it readily converts to lead(II) sulfide , which is black. Treating metal sulfides with strong acid or electrolysis often liberates hydrogen sulfide. Hydrogen sulfide

1470-400: A result of the action of sulfate-reducing bacteria . Hydrogen sulfide is produced by the human body in small quantities through bacterial breakdown in the intestinal tract of proteins containing sulfur; it therefore contributes to the characteristic odor of flatulence. It is also produced in the mouth ( halitosis ). A portion of global H 2 S emissions are due to human activity. By far

1575-580: A speaker of Persian. Persian is a member of the Western Iranian group of the Iranian languages , which make up a branch of the Indo-European languages in their Indo-Iranian subdivision . The Western Iranian languages themselves are divided into two subgroups: Southwestern Iranian languages, of which Persian is the most widely spoken, and Northwestern Iranian languages, of which Kurdish and Balochi are

1680-459: A variety of wild life, thermal springs, summer quarters, and rural settlements are some of the special factors which can prove attractive. The majestic valleys, rivers, springs, waterfalls, colorful vegetation, diversity of wildlife, thermal springs, summer quarters and rural settlements appeal to visitors. Mount Damavand , 5610 m, the highest point in the Middle East These mountains form

1785-510: A village by the name Larijan in the district of Larijan in Lar Valley . The water from this spring is useful in the treatment of chronic wounds and skin diseases. Near these springs there are public baths with small pools for public use Mineral water , meat , dairy , Wood and ingots the main production industrial are. Agriculture and Tourism are the basis economy Amol economic base is in its provincial products. Agriculture has always been

1890-464: A waste product. Water heaters can aid the conversion of sulfate in water to hydrogen sulfide gas. This is due to providing a warm environment sustainable for sulfur bacteria and maintaining the reaction which interacts between sulfate in the water and the water heater anode, which is usually made from magnesium metal. H 2 S in the body acts as a gaseous signaling molecule with implications for health and in diseases. Hydrogen sulfide

1995-485: Is stinkdamp . Hydrogen sulfide is a highly toxic and flammable gas ( flammable range : 4.3–46%). It can poison several systems in the body, although the nervous system is most affected. The toxicity of H 2 S is comparable with that of carbon monoxide . It binds with iron in the mitochondrial cytochrome enzymes , thus preventing cellular respiration . Its toxic properties were described in detail in 1843 by Justus von Liebig . Even before hydrogen sulfide

2100-644: Is a continuation of Middle Persian , an official language of the Sasanian Empire (224–651 CE), itself a continuation of Old Persian , which was used in the Achaemenid Empire (550–330 BCE). It originated in the region of Fars ( Persia ) in southwestern Iran. Its grammar is similar to that of many European languages. Throughout history, Persian was considered prestigious by various empires centered in West Asia , Central Asia , and South Asia . Old Persian

2205-610: Is a direct descendant of Middle and Old Persian. Gernot Windfuhr considers new Persian as an evolution of the Old Persian language and the Middle Persian language but also states that none of the known Middle Persian dialects is the direct predecessor of Modern Persian. Ludwig Paul states: "The language of the Shahnameh should be seen as one instance of continuous historical development from Middle to New Persian." The known history of

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2310-433: Is also known to increase the levels of glutathione, which acts to reduce or disrupt ROS levels in cells. The field of H 2 S biology has advanced from environmental toxicology to investigate the roles of endogenously produced H 2 S in physiological conditions and in various pathophysiological states. H 2 S has been implicated in cancer and Down syndrome and vascular disease. It inhibits Complex IV of

2415-399: Is also responsible for tarnishing on various metals including copper and silver ; the chemical responsible for black toning found on silver coins is silver sulfide ( Ag 2 S ), which is produced when the silver on the surface of the coin reacts with atmospheric hydrogen sulfide. Coins that have been subject to toning by hydrogen sulfide and other sulfur-containing compounds may have

2520-812: Is also spoken natively in the Tajik variety by a significant population within Uzbekistan , as well as within other regions with a Persianate history in the cultural sphere of Greater Iran . It is written officially within Iran and Afghanistan in the Persian alphabet , a derivative of the Arabic script , and within Tajikistan in the Tajik alphabet , a derivative of the Cyrillic script . Modern Persian

2625-654: Is attested in Old Persian cuneiform on inscriptions from between the 6th and 4th century BC. Middle Persian is attested in Aramaic -derived scripts ( Pahlavi and Manichaean ) on inscriptions and in Zoroastrian and Manichaean scriptures from between the third to the tenth centuries (see Middle Persian literature ). New Persian literature was first recorded in the ninth century, after the Muslim conquest of Persia , since then adopting

2730-475: Is bred in the region of the Middle East. This is one of the most mythic Iran named Arash . [REDACTED] Media related to Amol County at Wikimedia Commons Persian language Russia Persian ( / ˈ p ɜːr ʒ ən , - ʃ ən / PUR -zhən, -⁠shən ), also known by its endonym Farsi ( فارسی , Fārsī [fɒːɾˈsiː] ), is a Western Iranian language belonging to

2835-411: Is completely frozen throughout the year, except the trickle of water flowing from melting glacier above it for a short period in summer. The said waterfall is one of its own in the world. The other proposed Waterfall in county named, Ab Murad, Plas, Tara, Sang Darka, Qaleh Dokhtar, Peromed and Deryouk. In this village there are many hot baths. Of about 1,000 liters of water per minute Chshmە larijan SPA

2940-425: Is conventionally divided into three stages: Early New Persian remains largely intelligible to speakers of Contemporary Persian, as the morphology and, to a lesser extent, the lexicon of the language have remained relatively stable. New Persian texts written in the Arabic script first appear in the 9th-century. The language is a direct descendant of Middle Persian, the official, religious, and literary language of

3045-420: Is harmless. Hence, low levels of hydrogen sulfide may be tolerated indefinitely. Exposure to lower concentrations can result in eye irritation, a sore throat and cough , nausea, shortness of breath, and fluid in the lungs . These effects are believed to be due to hydrogen sulfide combining with alkali present in moist surface tissues to form sodium sulfide , a caustic . These symptoms usually subside in

3150-409: Is involved in vasodilation in animals, as well as in increasing seed germination and stress responses in plants. Hydrogen sulfide signaling is moderated by reactive oxygen species (ROS) and reactive nitrogen species (RNS). H 2 S has been shown to interact with NO resulting in several different cellular effects, as well as the formation of another signal called nitrosothiol. Hydrogen sulfide

3255-418: Is natural gas with a high content of H 2 S . It can also be produced by treating hydrogen with molten elemental sulfur at about 450 °C. Hydrocarbons can serve as a source of hydrogen in this process. The very favorable thermodynamics for the hydrogenation of sulfur implies that the dehydrogenation (or cracking ) of hydrogen sulfide would require very high temperatures. A standard lab preparation

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3360-455: Is not actually attested until 600 years later when it appears in the Sassanid era (224–651 AD) inscriptions, so any form of the language before this date cannot be described with any degree of certainty. Moreover, as a literary language, Middle Persian is not attested until much later, in the 6th or 7th century. From the 8th century onward, Middle Persian gradually began yielding to New Persian, with

3465-468: Is one of Afghanistan's two official languages, together with Pashto . The term Dari , meaning "of the court", originally referred to the variety of Persian used in the court of the Sasanian Empire in capital Ctesiphon , which was spread to the northeast of the empire and gradually replaced the former Iranian dialects of Parthia ( Parthian ). Tajik Persian ( форси́и тоҷикӣ́ , forsi-i tojikī ),

3570-570: Is one of the earliest attested Indo-European languages. According to certain historical assumptions about the early history and origin of ancient Persians in Southwestern Iran (where Achaemenids hailed from), Old Persian was originally spoken by a tribe called Parsuwash , who arrived in the Iranian Plateau early in the 1st millennium BCE and finally migrated down into the area of present-day Fārs province. Their language, Old Persian, became

3675-469: Is pressurized at higher temperatures, then cooled, the critical temperature reaches 203 K (−70 °C), the highest accepted superconducting critical temperature as of 2015. By substituting a small part of sulfur with phosphorus and using even higher pressures, it has been predicted that it may be possible to raise the critical temperature to above 0 °C (273 K) and achieve room-temperature superconductivity . Hydrogen sulfide decomposes without

3780-517: Is removed. Its temperature is between 65 and 70 degrees Celsius. The unpleasant taste and odor of hydrogen sulfide and water color is clear. This is the source of magnesium and bicarbonate salts for skin disease, old wounds, rheumatism, respiratory tract diseases and neurological disorders is beneficial. Bath's monuments in the village of Shah Abbas Safavid period is related to The most important of these hot springs are located in Abe Garm Larijan in

3885-486: Is the appropriate designation of the language in English, as it has the longer tradition in western languages and better expresses the role of the language as a mark of cultural and national continuity. Iranian historian and linguist Ehsan Yarshater , founder of the Encyclopædia Iranica and Columbia University 's Center for Iranian Studies, mentions the same concern in an academic journal on Iranology , rejecting

3990-845: Is to treat ferrous sulfide with a strong acid in a Kipp generator : For use in qualitative inorganic analysis , thioacetamide is used to generate H 2 S : Many metal and nonmetal sulfides, e.g. aluminium sulfide , phosphorus pentasulfide , silicon disulfide liberate hydrogen sulfide upon exposure to water: This gas is also produced by heating sulfur with solid organic compounds and by reducing sulfurated organic compounds with hydrogen. It can also be produced by mixing ammonium thiocyanate to concentrated sulphuric acid and adding water to it. Hydrogen sulfide can be generated in cells via enzymatic or non-enzymatic pathways. Three enzymes catalyze formation of H 2 S : cystathionine γ-lyase (CSE), cystathionine β-synthetase (CBS), and 3-mercaptopyruvate sulfurtransferase (3-MST). CBS and CSE are

4095-522: Is typically removed by amine gas treating technologies. In such processes, the hydrogen sulfide is first converted to an ammonium salt, whereas the natural gas is unaffected. The bisulfide anion is subsequently regenerated by heating of the amine sulfide solution. Hydrogen sulfide generated in this process is typically converted to elemental sulfur using the Claus Process . The underground mine gas term for foul-smelling hydrogen sulfide-rich gas mixtures

4200-514: Is visible. In the southeastern sector, after running along the plains of Lar, the peaks of Haft Saran are apparent, and to the south of these plains are the peaks of Mehr Chal, Atashkadeh, Siyah Chal and Maaz. In the south eastern direction it joins the Khansak and Shad Kooh Mountains. The Haraz River 's source is in the skirts of the Alborz Mountains in the region of Larijan. After flowing along

4305-486: The Encyclopædia Iranica notes that the Iranian, Afghan, and Tajiki varieties comprise distinct branches of the Persian language, and within each branch a wide variety of local dialects exist. The following are some languages closely related to Persian, or in some cases are considered dialects: More distantly related branches of the Iranian language family include Kurdish and Balochi . The Glottolog database proposes

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4410-502: The Kalila wa Dimna . The language spread geographically from the 11th century on and was the medium through which, among others, Central Asian Turks became familiar with Islam and urban culture. New Persian was widely used as a trans-regional lingua franca , a task aided due to its relatively simple morphology, and this situation persisted until at least the 19th century. In the late Middle Ages, new Islamic literary languages were created on

4515-641: The Bakken formation crude, possibly due to oil field practices, and presented challenges such as "health and environmental risks, corrosion of wellbore, added expense with regard to materials handling and pipeline equipment, and additional refinement requirements". Besides living near gas and oil drilling operations, ordinary citizens can be exposed to hydrogen sulfide by being near waste water treatment facilities, landfills and farms with manure storage. Exposure occurs through breathing contaminated air or drinking contaminated water. In municipal waste landfill sites ,

4620-651: The British colonization , Persian was widely used as a second language in the Indian subcontinent . It took prominence as the language of culture and education in several Muslim courts on the subcontinent and became the sole "official language" under the Mughal emperors . The Bengal Sultanate witnessed an influx of Persian scholars, lawyers, teachers, and clerics. Thousands of Persian books and manuscripts were published in Bengal. The period of

4725-560: The Iranian branch of the Indo-Iranian subdivision of the Indo-European languages . Persian is a pluricentric language predominantly spoken and used officially within Iran , Afghanistan , and Tajikistan in three mutually intelligible standard varieties , respectively Iranian Persian (officially known as Persian ), Dari Persian (officially known as Dari since 1964), and Tajiki Persian (officially known as Tajik since 1999). It

4830-655: The Sultanate of Rum , Turkmen beyliks of Anatolia , Delhi Sultanate , the Shirvanshahs , Safavids , Afsharids , Zands , Qajars , Khanate of Bukhara , Khanate of Kokand , Emirate of Bukhara , Khanate of Khiva , Ottomans , and also many Mughal successors such as the Nizam of Hyderabad . Persian was the only non-European language known and used by Marco Polo at the Court of Kublai Khan and in his journeys through China. A branch of

4935-688: The Turkic , Armenian , Georgian , & Indo-Aryan languages . It also exerted some influence on Arabic, while borrowing a lot of vocabulary from it in the Middle Ages. Some of the world's most famous pieces of literature from the Middle Ages, such as the Shahnameh by Ferdowsi , the works of Rumi , the Rubáiyát of Omar Khayyám , the Panj Ganj of Nizami Ganjavi , The Divān of Hafez , The Conference of

5040-483: The ezāfe construction, expressed through ī (modern e/ye ), to indicate some of the relations between words that have been lost with the simplification of the earlier grammatical system. Although the "middle period" of the Iranian languages formally begins with the fall of the Achaemenid Empire, the transition from Old to Middle Persian had probably already begun before the 4th century BC. However, Middle Persian

5145-591: The hydrosulfide ion HS . Hydrogen sulfide and its solutions are colorless. When exposed to air, it slowly oxidizes to form elemental sulfur, which is not soluble in water. The sulfide anion S is not formed in aqueous solution. At pressures above 90 GPa ( gigapascal ), hydrogen sulfide becomes a metallic conductor of electricity. When cooled below a critical temperature this high-pressure phase exhibits superconductivity . The critical temperature increases with pressure, ranging from 23 K at 100 GPa to 150 K at 200 GPa. If hydrogen sulfide

5250-585: The " Persianized " Turko-Mongol dynasties during the 12th to 15th centuries, and under restored Persian rule during the 16th to 19th centuries. Persian during this time served as lingua franca of Greater Persia and of much of the Indian subcontinent . It was also the official and cultural language of many Islamic dynasties, including the Samanids, Buyids , Tahirids , Ziyarids , the Mughal Empire , Timurids , Ghaznavids , Karakhanids , Seljuqs , Khwarazmians ,

5355-672: The Birds by Attar of Nishapur , and the miscellanea of Gulistan and Bustan by Saadi Shirazi , are written in Persian. Some of the prominent modern Persian poets were Nima Yooshij , Ahmad Shamlou , Simin Behbahani , Sohrab Sepehri , Rahi Mo'ayyeri , Mehdi Akhavan-Sales , and Forugh Farrokhzad . There are approximately 130 million Persian speakers worldwide, including Persians , Lurs , Tajiks , Hazaras , Iranian Azeris , Iranian Kurds , Balochs , Tats , Afghan Pashtuns , and Aimaqs . The term Persophone might also be used to refer to

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5460-530: The Haraz Road and Valley for about 100 km. it meanders in the midst of the city of Amol, from where it reaches the Caspian Sea . The fringes of this river are utilized as recreational areas as well as for fishing. In order to reach this waterfall not much walking is needed, one could get to the waterfall by simply following the twentieth Shams Abad ally towards its end. This waterfall is spectacular in that it

5565-510: The Kraft process), tanneries and sewerage . H 2 S arises from virtually anywhere where elemental sulfur comes in contact with organic material, especially at high temperatures. Depending on environmental conditions, it is responsible for deterioration of material through the action of some sulfur oxidizing microorganisms. It is called biogenic sulfide corrosion . In 2011 it was reported that increased concentrations of H 2 S were observed in

5670-558: The Middle Ages, and is because of the lack of the phoneme /p/ in Standard Arabic. The standard Persian of Iran has been called, apart from Persian and Farsi , by names such as Iranian Persian and Western Persian , exclusively. Officially, the official language of Iran is designated simply as Persian ( فارسی , fārsi ). The standard Persian of Afghanistan has been officially named Dari ( دری , dari ) since 1958. Also referred to as Afghan Persian in English, it

5775-532: The Ottoman Empire all spoke Persian, such as Sultan Selim I , despite being Safavid Iran's archrival and a staunch opposer of Shia Islam . It was a major literary language in the empire. Some of the noted earlier Persian works during the Ottoman rule are Idris Bidlisi 's Hasht Bihisht , which began in 1502 and covered the reign of the first eight Ottoman rulers, and the Salim-Namah , a glorification of Selim I. After

5880-521: The Persian language can be divided into the following three distinct periods: As a written language , Old Persian is attested in royal Achaemenid inscriptions. The oldest known text written in Old Persian is from the Behistun Inscription , dating to the time of King Darius I (reigned 522–486 BC). Examples of Old Persian have been found in what is now Iran , Romania ( Gherla ), Armenia , Bahrain , Iraq , Turkey, and Egypt . Old Persian

5985-425: The Persian language, a language historically called Dari, emerged in present-day Afghanistan. The first significant Persian poet was Rudaki . He flourished in the 10th century, when the Samanids were at the height of their power. His reputation as a court poet and as an accomplished musician and singer has survived, although little of his poetry has been preserved. Among his lost works are versified fables collected in

6090-401: The Persian model: Ottoman Turkish , Chagatai Turkic , Dobhashi Bengali , and Urdu, which are regarded as "structural daughter languages" of Persian. "Classical Persian" loosely refers to the standardized language of medieval Persia used in literature and poetry . This is the language of the 10th to 12th centuries, which continued to be used as literary language and lingua franca under

6195-848: The Perso-Arabic script. Persian was the first language to break through the monopoly of Arabic on writing in the Muslim world , with Persian poetry becoming a tradition in many eastern courts. It was used officially as a language of bureaucracy even by non-native speakers, such as the Ottomans in Anatolia , the Mughals in South Asia, and the Pashtuns in Afghanistan. It influenced languages spoken in neighboring regions and beyond, including other Iranian languages,

6300-479: The Sasanian Empire (224–651). However, it is not descended from the literary form of Middle Persian (known as pārsīk , commonly called Pahlavi), which was spoken by the people of Fars and used in Zoroastrian religious writings. Instead, it is descended from the dialect spoken by the court of the Sasanian capital Ctesiphon and the northeastern Iranian region of Khorasan , known as Dari. The region, which comprised

6405-575: The Sassanids (who were Persians, i.e. from the southwest) from the preceding Arsacids (who were Parthians, i.e. from the northeast). While Ibn al-Muqaffa' (eighth century) still distinguished between Pahlavi (i.e. Parthian) and Persian (in Arabic text: al-Farisiyah) (i.e. Middle Persian), this distinction is not evident in Arab commentaries written after that date. "New Persian" (also referred to as Modern Persian)

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6510-457: The Seljuks, the Sultanate of Rum , took Persian language, art, and letters to Anatolia. They adopted the Persian language as the official language of the empire. The Ottomans , who can roughly be seen as their eventual successors, inherited this tradition. Persian was the official court language of the empire, and for some time, the official language of the empire. The educated and noble class of

6615-493: The area of Lake Urmia in the records of Shalmaneser III . The exact identity of the Parsuwash is not known for certain, but from a linguistic viewpoint the word matches Old Persian pārsa itself coming directly from the older word * pārćwa . Also, as Old Persian contains many words from another extinct Iranian language, Median , according to P. O. Skjærvø it is probable that Old Persian had already been spoken before

6720-540: The burial of organic material rapidly leads to the production of anaerobic digestion within the waste mass and, with the humid atmosphere and relatively high temperature that accompanies biodegradation , biogas is produced as soon as the air within the waste mass has been reduced. If there is a source of sulfate bearing material, such as plasterboard or natural gypsum (calcium sulfate dihydrate), under anaerobic conditions sulfate reducing bacteria converts this to hydrogen sulfide. These bacteria cannot survive in air but

6825-457: The code fas for the dialects spoken across Iran and Afghanistan. This consists of the individual languages Dari ( prs ) and Iranian Persian ( pes ). It uses tgk for Tajik, separately. In general, the Iranian languages are known from three periods: namely Old, Middle, and New (Modern). These correspond to three historical eras of Iranian history ; Old era being sometime around the Achaemenid Empire (i.e., 400–300 BC), Middle era being

6930-512: The collapse of the Sassanid state, Parsik came to be applied exclusively to (either Middle or New) Persian that was written in the Arabic script . From about the 9th century onward, as Middle Persian was on the threshold of becoming New Persian, the older form of the language came to be erroneously called Pahlavi , which was actually but one of the writing systems used to render both Middle Persian as well as various other Middle Iranian languages. That writing system had previously been adopted by

7035-590: The corresponding metal sulfides. Oxidic ores are sometimes treated with hydrogen sulfide to give the corresponding metal sulfides which are more readily purified by flotation . Metal parts are sometimes passivated with hydrogen sulfide. Catalysts used in hydrodesulfurization are routinely activated with hydrogen sulfide. Hydrogen sulfide was a reagent in the qualitative inorganic analysis of metal ions. In these analyses, heavy metal (and nonmetal ) ions (e.g., Pb(II), Cu(II), Hg(II), As(III)) are precipitated from solution upon exposure to H 2 S . The components of

7140-527: The country due to its extensive economic activities, about 70 thousand workers are working in 5 industrial towns of Amol. Amol is Mazandaran's export pole 79% of Mazandaran exports belong to county. Amol owns 47% of the province's industry . In city and county: Many historical and natural attractions in its place. This region has mountain villages, plains and meadows immense. Now due to the Damavand Haraz River originates best and highest-quality trout

7245-519: The cysteine catabolic pathway. Dietary amino acids, such as methionine and cysteine serve as the primary substrates for the transulfuration pathways and in the production of hydrogen sulfide. Hydrogen sulfide can also be derived from proteins such as ferredoxins and Rieske proteins . Sulfate-reducing (resp. sulfur-reducing ) bacteria generate usable energy under low-oxygen conditions by using sulfates (resp. elemental sulfur) to oxidize organic compounds or hydrogen; this produces hydrogen sulfide as

7350-481: The east, Mahmudabad in the north, Babolsar in the northeast, Nur in the west in Mazandaran province , and Tehran province in the south. This area with its elevated landscape and valleys has dense forests. Its tall hills overlook the plains and stretch out till the high slopes of the Damavand Mountains. The majestic and deep rocky valleys, rivers, numerous springs, elevated waterfalls, colorful vegetation,

7455-632: The extent of its influence on certain languages of the Indian subcontinent. Words borrowed from Persian are still quite commonly used in certain Indo-Aryan languages, especially Hindi - Urdu (also historically known as Hindustani ), Punjabi , Kashmiri , and Sindhi . There is also a small population of Zoroastrian Iranis in India, who migrated in the 19th century to escape religious execution in Qajar Iran and speak

7560-489: The following phylogenetic classification: Hydrogen sulfide Hydrogen sulfide is toxic to humans and most other animals by inhibiting cellular respiration in a manner similar to hydrogen cyanide . When it is inhaled or its salts are ingested in high amounts, damage to organs occurs rapidly with symptoms ranging from breathing difficulties to convulsions and death. Despite this, the human body produces small amounts of this sulfide and its mineral salts, and uses it as

7665-562: The formation of many modern languages in West Asia, Europe, Central Asia , and South Asia . Following the Turko-Persian Ghaznavid conquest of South Asia , Persian was firstly introduced in the region by Turkic Central Asians. The basis in general for the introduction of Persian language into the subcontinent was set, from its earliest days, by various Persianized Central Asian Turkic and Afghan dynasties. For five centuries prior to

7770-471: The formation of the Achaemenid Empire and was spoken during most of the first half of the first millennium BCE. Xenophon , a Greek general serving in some of the Persian expeditions, describes many aspects of Armenian village life and hospitality in around 401 BCE, which is when Old Persian was still spoken and extensively used. He relates that the Armenian people spoke a language that to his ear sounded like

7875-461: The language of the Persians. Related to Old Persian, but from a different branch of the Iranian language family, was Avestan , the language of the Zoroastrian liturgical texts. The complex grammatical conjugation and declension of Old Persian yielded to the structure of Middle Persian in which the dual number disappeared, leaving only singular and plural, as did gender. Middle Persian developed

7980-409: The largest industrial source of H 2 S is petroleum refineries : The hydrodesulfurization process liberates sulfur from petroleum by the action of hydrogen. The resulting H 2 S is converted to elemental sulfur by partial combustion via the Claus process , which is a major source of elemental sulfur. Other anthropogenic sources of hydrogen sulfide include coke ovens, paper mills (using

8085-420: The main proponents of H 2 S biogenesis, which follows the trans-sulfuration pathway. These enzymes have been identified in a breadth of biological cells and tissues, and their activity is induced by a number of disease states. These enzymes are characterized by the transfer of a sulfur atom from methionine to serine to form a cysteine molecule. 3-MST also contributes to hydrogen sulfide production by way of

8190-432: The middle-period form only continuing in the texts of Zoroastrianism . Middle Persian is considered to be a later form of the same dialect as Old Persian. The native name of Middle Persian was Parsig or Parsik , after the name of the ethnic group of the southwest, that is, "of Pars ", Old Persian Parsa , New Persian Fars . This is the origin of the name Farsi as it is today used to signify New Persian. Following

8295-579: The mitochondrial electron transport chain, which effectively reduces ATP generation and biochemical activity within cells. Hydrogen sulfide is mainly consumed as a precursor to elemental sulfur. This conversion, called the Claus process , involves partial oxidation to sulfur dioxide. The latter reacts with hydrogen sulfide to give elemental sulfur. The conversion is catalyzed by alumina. Many fundamental organosulfur compounds are produced using hydrogen sulfide. These include methanethiol , ethanethiol , and thioglycolic acid . Hydrosulfides can be used in

8400-474: The moist, warm, anaerobic conditions of buried waste that contains a high source of carbon – in inert landfills, paper and glue used in the fabrication of products such as plasterboard can provide a rich source of carbon – is an excellent environment for the formation of hydrogen sulfide. In industrial anaerobic digestion processes, such as waste water treatment or the digestion of organic waste from agriculture , hydrogen sulfide can be formed from

8505-525: The most widely spoken. The term Persian is an English derivation of Latin Persiānus , the adjectival form of Persia , itself deriving from Greek Persís ( Περσίς ), a Hellenized form of Old Persian Pārsa ( 𐎱𐎠𐎼𐎿 ), which means " Persia " (a region in southwestern Iran, corresponding to modern-day Fars ). According to the Oxford English Dictionary , the term Persian as

8610-461: The nationalist movement of the time. The academy was a key institution in the struggle to re-build Iran as a nation-state after the collapse of the Qajar dynasty. During the 1930s and 1940s, the academy led massive campaigns to replace the many Arabic , Russian , French , and Greek loanwords whose widespread use in Persian during the centuries preceding the foundation of the Pahlavi dynasty had created

8715-495: The necessity of protecting the Persian language against foreign words, and to the standardization of Persian orthography , were under the reign of Naser ed Din Shah of the Qajar dynasty in 1871. After Naser ed Din Shah, Mozaffar ed Din Shah ordered the establishment of the first Persian association in 1903. This association officially declared that it used Persian and Arabic as acceptable sources for coining words. The ultimate goal

8820-414: The next period most officially around the Sasanian Empire , and New era being the period afterward down to present day. According to available documents, the Persian language is "the only Iranian language" for which close philological relationships between all of its three stages are established and so that Old, Middle, and New Persian represent one and the same language of Persian; that is, New Persian

8925-713: The northern part of Greece). Vardar Yenicesi differed from other localities in the Balkans insofar as that it was a town where Persian was also widely spoken. However, the Persian of Vardar Yenicesi and throughout the rest of the Ottoman-held Balkans was different from formal Persian both in accent and vocabulary. The difference was apparent to such a degree that the Ottomans referred to it as "Rumelian Persian" ( Rumili Farsisi ). As learned people such as students, scholars and literati often frequented Vardar Yenicesi, it soon became

9030-529: The official language of the Achaemenid kings. Assyrian records, which in fact appear to provide the earliest evidence for ancient Iranian (Persian and Median) presence on the Iranian Plateau, give a good chronology but only an approximate geographical indication of what seem to be ancient Persians. In these records of the 9th century BCE, Parsuwash (along with Matai , presumably Medians) are first mentioned in

9135-628: The present territories of northwestern Afghanistan as well as parts of Central Asia, played a leading role in the rise of New Persian. Khorasan, which was the homeland of the Parthians, was Persianized under the Sasanians. Dari Persian thus supplanted Parthian language , which by the end of the Sasanian era had fallen out of use. New Persian has incorporated many foreign words, including from eastern northern and northern Iranian languages such as Sogdian and especially Parthian. The transition to New Persian

9240-476: The production of thiophenol . Upon combining with alkali metal bases, hydrogen sulfide converts to alkali hydrosulfides such as sodium hydrosulfide and sodium sulfide : Sodium sulfides are used in the paper making industry. Specifically, salts of SH break bonds between lignin and cellulose components of pulp in the Kraft process . As indicated above, many metal ions react with hydrogen sulfide to give

9345-435: The reduction of sulfate and the degradation of amino acids and proteins within organic compounds. Sulfates are relatively non-inhibitory to methane forming bacteria but can be reduced to H 2 S by sulfate reducing bacteria , of which there are several genera. A number of processes have been designed to remove hydrogen sulfide from drinking water . Hydrogen sulfide is commonly found in raw natural gas and biogas. It

9450-578: The region during the following centuries. Persian continued to act as a courtly language for various empires in Punjab through the early 19th century serving finally as the official state language of the Sikh Empire , preceding British conquest and the decline of Persian in South Asia. Beginning in 1843, though, English and Hindustani gradually replaced Persian in importance on the subcontinent. Evidence of Persian's historical influence there can be seen in

9555-589: The reign of Sultan Ghiyathuddin Azam Shah is described as the "golden age of Persian literature in Bengal". Its stature was illustrated by the Sultan's own correspondence and collaboration with the Persian poet Hafez ; a poem which can be found in the Divan of Hafez today. A Bengali dialect emerged among the common Bengali Muslim folk, based on a Persian model and known as Dobhashi ; meaning mixed language . Dobhashi Bengali

9660-724: The resulting solid are then identified by their reactivity. Hydrogen sulfide is used to separate deuterium oxide, or heavy water , from normal water via the Girdler sulfide process . A suspended animation-like state has been induced in rodents with the use of hydrogen sulfide, resulting in hypothermia with a concomitant reduction in metabolic rate. Oxygen demand was also reduced, thereby protecting against hypoxia . In addition, hydrogen sulfide has been shown to reduce inflammation in various situations. Volcanoes and some hot springs (as well as cold springs ) emit some H 2 S . Hydrogen sulfide can be present naturally in well water, often as

9765-638: The sense of smell, creating temporary anosmia , so victims may be unaware of its presence until it is too late. Safe handling procedures are provided by its safety data sheet (SDS) . Since hydrogen sulfide occurs naturally in the body, the environment, and the gut, enzymes exist to metabolize it. At some threshold level, believed to average around 300–350 ppm, the oxidative enzymes become overwhelmed. Many personal safety gas detectors, such as those used by utility, sewage and petrochemical workers, are set to alarm at as low as 5 to 10 ppm and to go into high alarm at 15 ppm. Metabolism causes oxidation to sulfate, which

9870-607: The site of a flourishing Persianate linguistic and literary culture. The 16th-century Ottoman Aşık Çelebi (died 1572), who hailed from Prizren in modern-day Kosovo , was galvanized by the abundant Persian-speaking and Persian-writing communities of Vardar Yenicesi, and he referred to the city as a "hotbed of Persian". Many Ottoman Persianists who established a career in the Ottoman capital of Constantinople (modern-day Istanbul ) pursued early Persian training in Saraybosna, amongst them Ahmed Sudi . The Persian language influenced

9975-561: The standard Persian of Tajikistan, has been officially designated as Tajik ( тоҷикӣ , tojikī ) since the time of the Soviet Union . It is the name given to the varieties of Persian spoken in Central Asia in general. The international language-encoding standard ISO 639-1 uses the code fa for the Persian language, as its coding system is mostly based on the native-language designations. The more detailed standard ISO 639-3 uses

10080-687: The standard Persian. The Hazaragi dialect (in Central Afghanistan and Pakistan), Herati (in Western Afghanistan), Darwazi (in Afghanistan and Tajikistan), Basseri (in Southern Iran), and the Tehrani accent (in Iran, the basis of standard Iranian Persian) are examples of these dialects. Persian-speaking peoples of Iran, Afghanistan, and Tajikistan can understand one another with a relatively high degree of mutual intelligibility . Nevertheless,

10185-460: The toning add to the numismatic value of a coin based on aesthetics, as the toning may produce thin-film interference , resulting in the coin taking on an attractive coloration. Coins can also be intentionally treated with hydrogen sulfide to induce toning, though artificial toning can be distinguished from natural toning, and is generally criticised among collectors. Hydrogen sulfide is most commonly obtained by its separation from sour gas , which

10290-463: The two branch ranges of the central Alborz Mountains , and are the highest sections of this range. To the north, after the Kahu ( Sefid Ab ) Pass, in the village of Garmabdar ( district of Roodbar-e-Qasran ), it sub-divides into two, the north western and south eastern ranges. In the south western sector are the peaks of Takht-e-khers and Se sang, extending towards the west, where the gigantic Damavand Peak

10395-478: The use of Farsi in foreign languages. Etymologically, the Persian term Farsi derives from its earlier form Pārsi ( Pārsik in Middle Persian ), which in turn comes from the same root as the English term Persian . In the same process, the Middle Persian toponym Pārs ("Persia") evolved into the modern name Fars. The phonemic shift from /p/ to /f/ is due to the influence of Arabic in

10500-578: Was already complete by the era of the three princely dynasties of Iranian origin, the Tahirid dynasty (820–872), Saffarid dynasty (860–903), and Samanid Empire (874–999). Abbas of Merv is mentioned as being the earliest minstrel to chant verse in the New Persian tongue and after him the poems of Hanzala Badghisi were among the most famous between the Persian-speakers of the time. The first poems of

10605-462: Was discovered, Italian physician Bernardino Ramazzini hypothesized in his 1713 book De Morbis Artificum Diatriba that occupational diseases of sewer-workers and blackening of coins in their clothes may be caused by an unknown invisible volatile acid (moreover, in late 18th century toxic gas emanation from Paris sewers became a problem for the citizens and authorities). Although very pungent at first (it smells like rotten eggs ), it quickly deadens

10710-467: Was elevated to the status of a city. Additionally, Dabuy-ye Miyani Rural District was formed in Dabudasht District , and Dasht-e Sar Rural District was separated from it in the establishment of Dasht-e Sar District , which was divided into two rural districts, including the new Dasht-e Sar-e Gharbi Rural District . After the 2016 census, the village of Ejbar Kola was elevated to the status of

10815-586: Was patronised and given official status under the Sultans of Bengal , and was a popular literary form used by Bengalis during the pre-colonial period, irrespective of their religion. Following the defeat of the Hindu Shahi dynasty, classical Persian was established as a courtly language in the region during the late 10th century under Ghaznavid rule over the northwestern frontier of the subcontinent . Employed by Punjabis in literature, Persian achieved prominence in

10920-600: Was taught in state schools, and was also offered as an elective course or recommended for study in some madrasas . Persian learning was also widespread in the Ottoman-held Balkans ( Rumelia ), with a range of cities being famed for their long-standing traditions in the study of Persian and its classics, amongst them Saraybosna (modern Sarajevo , Bosnia and Herzegovina), Mostar (also in Bosnia and Herzegovina), and Vardar Yenicesi (or Yenice-i Vardar, now Giannitsa , in

11025-484: Was to prevent books from being printed with wrong use of words. According to the executive guarantee of this association, the government was responsible for wrongfully printed books. Words coined by this association, such as rāh-āhan ( راه‌آهن ) for "railway", were printed in Soltani Newspaper ; but the association was eventually closed due to inattention. A scientific association was founded in 1911, resulting in

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