How Poisonous Are Green Potatoes

Have you ever been told to avoid the green part of some potatoes because theyre poisonous? Potatoes, and especially any green part of the plant, contain a toxic chemical called solanine. This glycoalkaloid poison is found in all members of the nightshade family of plants, not just potatoes. The chemical is a natural pesticide, so it protects the plants from insects. How toxic is solanine from potatoes? Which other plants contain solanine, what are the symptoms of solanine poisoning, and how many potatoes would you have to eat to get sick or die? Plants That Contain Solanine Deadly nightshade is the most lethal member of the plant family. The berries are a well-known classic poison. Many edible plants are related to deadly nightshade but they are not nearly so dangerous. They include: PotatoesPeppers (both sweet and hot)EggplantTomatoes (some reports indicate that tomatoes contain the alkaloid tomatine rather than solanine) All parts of the plant contain the compound, so theres a risk from eating too much of the leaves, tubers, or fruits. However, glycoalkaloid production increases in the presence of photosynthesis, so the green parts of the plants tend to contain the highest levels of the toxin. Solanine Toxicity Solanine is toxic if its ingested (eaten or in a drink). Toxic symptoms appear at doses of 2-5 mg/kg body weight, with lethal doses at 3-6 mg/kg body weight. Symptoms of Solanine Poisoning Solanine and related glycoalkaloids interact with mitochondria membranes, disrupting cell membranes, and inhibiting cholinesterase, leading to cell death and possibly causing birth defects (congenital spina bifida). The onset, type, and severity of the symptoms of exposure depend on an individuals sensitivity to the chemical and the dose. Symptoms may appear as quickly as 30 minutes after eating solanine-rich foods but usually occur eight to 12 hours after ingestion. Gastrointestinal and neurological symptoms are most noticeable. At low levels, symptoms include stomach cramps, nausea, burning throat, headache, dizziness, and diarrhea. Cardiac dysrhythmia, hallucinations, vision changes, slowed breathing, fever, jaundice, hypothermia, loss of sensation, dilated pupils, and death have all been reported. How Many Potatoes Does It Take? Basically, an adult would need to eat a lot of potatoes to get sick...usually. Solanine isnt the only toxic chemical found in potatoes. A related compound, chaconine, is also present. Potato shoots (eyes), leaves, and stems are higher in glycoalkaloids than potatoes, but green potatoes contain significantly higher amounts of the toxic compounds than non-green portions. In general, the solanine is concentrated in the potato skin (30 to 80 percent), so eating just the skin of the potato or its eyes would be more likely to cause a problem than eating the whole spud. Also, solanine levels vary according to potato variety and whether or not the plant was diseased. Potato blight, in particular, elevates toxin levels. Since there are so many factors, its difficult to put a number of how many potatoes is too many. Estimates on how many potatoes youd have to eat on average to get sick or die are around four and a half to five pounds of normal potatoes or two pounds of green potatoes. A large potato weighs roughly half a pound, so its reasonable to expect you could get sick from eating four potatoes. Protecting Yourself Against Solanine Poisoning Potatoes are nutritious and delicious, so you shouldnt avoid eating them just because the plant contains a natural defensive chemical. However, its best to avoid green-colored skin or potatoes that taste bitter (both signs of high solanine content). The National Institutes of Health advises people to avoid eating potatoes with green skin. Peeling green potatoes will remove most of the risk, although eating a few potato chips with green edges wont hurt an adult. Its recommended that green potatoes not be served to children since they weigh less and are more susceptible to the toxin. Neither children nor adults should eat potato plant leaves and stems. If you do experience the symptoms of solanine poisoning, contact your doctor or a poison control center. If you experience solanine poisoning, you can expect to experience symptoms for one to three days. Hospitalization may be required, depending on the level of exposure and severity of symptoms. Treatment typically includes replacing fluids and electrolytes from vomiting and diarrhea. Atropine may be given if there is significant bradycardia (slow heartbeat). Death is rare. Sources Friedman, M. Postharvest changes in glycoalkaloid content of potatoes. U.S. National Library of Medicine National Institutes of Health, 1999, Bethesda MD. Gao, Shi-Yong. Effect of solanine on the membrane potential of mitochondria in HepG2 cells and [Ca2]i in the cells. World Journal of Gastroenterology, Qiu-Juan Wang, Yu-Bin Ji, National Center for Biotechnology Information, U.S. National Library of Medicine, June 7, 2006. Potato plant poisoning - green tubers and sprouts. MedlinePlus, U.S. Department of Health and Human Services, National Institutes of Health, June 3, 2019. Tice, Ph.D. Raymond. Review of Toxicological Literature. National Center for Biotechnology Information, Integrated Laboratory Systems, February 1998, Research Triangle Park, NC.

The Things They Carried By Tim O Brien - 1039 Words

â€Å"My life is storytelling. I believe in stories, in their incredible power to keep people alive, to keep the living alive, and the dead.† Tim O’Brien’s novel, The Things They Carried, was filled with embellished stories and memories of war veterans. O’Brien’s reasoning for writing that particular book was because he believed that while a memory can die with a person, written words are forever set in stone. In his book, War was every one of the soldier’s enemy; It did not matter which side they fought on. War took men physically and mentally. O’Brien displayed how war stories were based on a certain soldier’s experiences, morals, and personality; Readers never truly knew fact from fiction. O’Brien’s intended audience were readers who were†¦show more content†¦He chose war and went home. â€Å"I feared war, yes, but I also feared exile†(O’Brien 42). O’Brien considered himself a cowar d because he chose war, but above all, he feared that his family would dishonor him. He was embarrassed not to go to war and ended up putting others’ morals before his own. In addition to the theme of morality found in â€Å"Rainy River†, it is also noticeable in the chapter â€Å"Church†. During the war, O’Brien’s unit had just come across a pagoda, a buddhist temple, and a pair of monks who lived there. The monks invited them to set up camp and helped the soldiers with water, cleaning guns, and more. Henry Dobbins chatted with Kiowa about joining the monks when the war was over, because he believed in the friendliness of religion by being amiable and helping others. Both exchanged words about what religion meant to them and Kiowa stated that he had always been religious and enjoyed the comfort and silence of being inside a church. â€Å"Setting up here,† he says, â€Å"It’s wrong. I don’t care what, it’s still a church†(O’Brien 116). Kiowa did not believe in setting up the unit’s base operations inside of a holy place. Growing up religious, Kiowa’s morals impacted his decisions and opinions made in war. Similar to the theme of morality, O’Brien discusses storytelling and memory in the chapter â€Å"Sweetheart of the Song Tra Bong.† Rat Kiley told the story of a man named Mark Foisse who flew his girl, Mary Anne, to visit him in Vietnam. The

Corporate Strategies to Hedge Commodity Price Risks Applying Free Essays

string(48) " time period in the future for a certain price\." Table of contents List of abbreviationsIII List of figuresIII List of tablesIII 1Introduction1 1. 1Problem and objective1 1. 2Structure of this paper1 2Background Information2 2. We will write a custom essay sample on Corporate Strategies to Hedge Commodity Price Risks Applying or any similar topic only for you Order Now 1Definitions of fundamental terms2 2. 2Commodity price risk in different firms2 3Explanation of derivatives3 3. 1Options3 3. 2Futures4 3. 3Forwards6 3. 4Swaps6 4Hedging strategies with derivatives7 4. 1Hedging with options7 4. 2Hedging with futures7 4. 3Hedging with forwards8 4. 4Hedging with swaps8 5Pros and cons of hedging strategies with derivatives8 5. 1Pros and cons of options9 5. Pros and cons of futures9 5. 3Pros and cons of forwards10 5. 4Pros and cons of swaps10 6Practical example of corporate commodity price risk hedging10 6. 1Introduction on firm’s practical hedging strategy10 6. 2Analysis on this strategy11 7Summary12 Appendix13 Appendix 1: Amounts outstanding of over-the-counter (OTC) derivatives by risk category and instrument——in billions of US dollar13 Appendix 2: Derivatives financial instruments traded on organized exchanges by instrument and location——in billions of US dollar14 Bibliography15 Internet Source16 List of abbreviatio ns CHClearing House IMInitial Margin MBMargin Balance MM NMaintenance Margin No OTCOver The Count VM YVariation Margin Yes List of figures Figure 1: Structure of this paper2 Figure 2: P of each option position4 Figure 3: Flow chart of marking-to-market process5 Figure 4: P of each future position6 Figure 5: Hedging model on fuel oil of Air China11 List of tables Table 1: Summary for 4 option positions4 Table 2: Summary for future positions6 Table 3: Summary for 4 derivatives9 1Introduction 1. 1Problem and objective The risk of commodity price is a ferocious topic in corporate operation. Corporate profit is equal to total revenue minus total cost. For firms, because of the high volatility on commodity price, their inputs and outputs relating to commodity are unpredictable. As a consequence corporate profit will be immensely volatile, which will possibly lead the firm to go bankruptcy if no any preventive actions are taken. For example, producers of commodities probably need to assume unexpected losses, when the price of outputs goes down or the price of necessary raw materials goes up. The situations are similar to wholesale buyers, retailers, exporters and even governments. Volatility of commodities price has great impacts on corporate daily operation. The objective of this term paper is to introduce derivative hedging strategies for corporate managers to reduce or even eliminate future unpredictability, mainly from the perspectives of the role commodity price risks play, what the typical derivative instruments are, where and how to apply these different derivatives in terms of hedging principles thereof, and both advantages and disadvantages when applying each derivative in real business transactions. 1. Structure of this paper Firstly, this term paper highlights problems existing in real world. Secondly, it introduces advanced derivatives theory that can be applied to solve these problems. Thirdly, specific details on the theory will be presented, including explanation, application, as well as pros and cons of each derivative instrument. Then, an example is analyzed to show how companies apply derivatives to hedge commodity risks practically. Last is a summary of this term paper. Following figure shows the body of this paper. 2Background Information 2. Definitions of fundamental terms In financial markets derivative is a contract or security whose value is derived from the value of other more basic underlying variables . One of its most important functions is hedging. In corporate operation, hedging is to secure the companies against potential loss caused by variable risks that arise in international market, such as the commodity price risks. In this paper, commodity means any tangible goods or raw materials that may be sold or traded in the markets, such as energy, gold, or agricultural products. 2. Commodity price risk in different firms Volatility of commodities price influences firms’ daily operation significantly. Producers of commodities, such as farms, oil producers, mining companies, face price risk on output. Wholesalers and retailers, face price risk during the time period from buying from suppliers and selling to customers. Exporters, face the same price risk as well as currency exchange risk. And governments face price and yield risks generating from tax revenues that depend on firms’ operational conditions. 3Explanation of derivatives Derivatives are traded in exchange-traded markets and over-the-counter markets. (See recent derivatives transaction status in appendix 1 and appendix 2. ) Notably, exchange-traded derivatives are default risk free and liquid. However over-the-counter traded derivatives are the opposite. 3. 1Options An option is the contract that gives the buyer the right but not obligation to buy (call option) or sell (put option) an underlying asset at a predetermined price (exercise price) for certain quantity during a fixed period of time (maturity). The buyer of the option pays a particular amount of money (option premium) to the seller to buy a right whereby he can decide whether or not to exercise this option, simultaneously the seller has the obligation to perform if the buyer exercises the option. European options only can be exercised on expiration day, and American options can be exercised at any time before maturity. The buyer of the call option is named long call, while the seller of the call option is named short call. Similarly, the buyer of the put option is named long put, while the seller of the put option is named short put. In commodity market, underlying of commodity option is a commodity, such as oil, wheat, or gold. Commodity options are both exchanges-traded and OTC traded. Following figure shows P of each option. Following table is the summary for these 4 option positions. Table 1: Summary for 4 option positions Market price expectationMaximum profitMaximum lossBreakeven point Long callupunlimitedoption premiumexercise price + option premium Short calldown or stableoption premiumunlimitedexercise price + option premium Long putdownexercise price – option premiumoption premiumexercise price – option premium Short putup or stableoption remiumexercise price – option premiumexercise price – option premium Source: author’s own. 3. 2Futures A future is a contract between two parties to buy or sell a specified amount of asset at a specified time period in the future for a certain price. You read "Corporate Strategies to Hedge Commodity Price Risks Applying" in category " Essay examples" Normally there are two types of futures, commodity futures whose underlying are commodities and financial futures whose underlying are financial assets. They are highly standardized, regulated, and traded in exchange markets with highly liquid and default risk free property. Because of the marking-to-market process, at maturity the settling price is the spot price at expiration date with profit gaining or loss paying from a margin account, which indirectly makes the effective bargain price equal to the predetermined price in the future contract. Notably, to ensure high liquidity of futures, marking-to-market process plays a significant role. The following figure shows the marking-to-market process. Generally there are two alternative ways at maturity to settle futures, either by cash or by actual delivery of underlying, which is clearly defined by futures exchange. Following figure and table show the details of a future. Table 2: Summary for future positions ?Maximum profitMaximum lossBreakeven point Long positionunlimitedexercise pricespot price + cost of carry Short positionexercise priceunlimitedspot price + cost of carry Source: author’s own. 3. 3Forwards A forward contract is a customized and over-the-counter agreement to buy or sell an asset at a specified time in the future for a specified price, where a long position has the obligation to buy and a short position has the obligation to sell. Compared with futures, no marking-to-market process are required. Counterparties can negotiate with each about the parameters of the contract. As a result, a firm who wants to make forward contract needs to find the counterparty by itself. 3. 4Swaps A swap is a customized and over-the-counter agreement to exchange a series of specified assets periodically in the future. Normally the counterparties of a swap contract are a large institution such as a bank and a company. Basically, we can view a swap as a complicated forward. Except currency swaps, counterparties just need to pay the differences between the cash flow they should exchange. Because swaps are bespoken as a result they are less liquid. There are commodity swaps, interest rate swaps and currency swaps. Interest rate swaps is an agreement of two counterparties to change fixed interest and floating interest on predefined nominal principal in the future periodically. Commodity swaps normally vary tremendously among different markets. In a currency swap, counterparties change same value of different currencies in inception and termination, where the exchange rate of the tow currencies depends on the negotiation of counterparties. 4Hedging strategies with derivatives This chapter will focus on the principles of hedging strategies on commodities. . 1Hedging with options If a trader wants to procure a commodity with high volatile price, he can buy a commodity call option to hedge the price risk of going up. Similarly, if a company wants to sell a commodity product, it can buy a long put to hedge the price risk of going down. In practice, because investors want to bet more precisely on the future price of the underlying, an d hedgers with long positions want to save option premiums, a few combinations of options come out, such as a long call and a short put with identical parameters except the different strike price. 4. 2Hedging with futures When the objective of a commodity trader wants to neutralize the price risk as far as possible, usually he will choose to take a position on a future on commodity. A hedger who already owns a commodity asset or doesn‘t own right now but will at some future time expecting to sell it in the future without assuming any price risk, he can apple future hedging strategy to enter into a short position to become a short. Likewise, a hedger who has to buy a certain commodity asset in the future and wants to lock in spot price immediately, he can apply a future to enter into a long position to become a long. . 3Hedging with forwards The principles of hedging strategy with forwards are similar with futures’. Whether to use futures or forwards depends on different requirements. Generally, financial assets investors who need high liquidity prefer to choose futures, while commodity investors such as producers who need high customization prefer to choose forwards. 4. 4Hedging with swap s When investors want to hedge risks of interest rates, currencies, or commodities, they can use swaps. In gold swaps, counterparties change fixed lease rate with variable lease rate. In swaps on base metals, counterparties change fixed metal price with average price of near dated metal future. In oil swaps, counterparties change fixed West Taxes Intermediate (WTI is a benchmark in oil price) price with average price of near dated WTI future. 5Pros and cons of hedging strategies with derivatives The following integrated summary of these derivatives depending on pervious analysis makes systematic comparisons. (The options here are exchanged-traded European options) Table 3: Summary for 4 derivatives SUMMERY OF DERIVATIVES FOR GENERAL TYPES OptionsFuturesForwardsSwaps Types of contractstandardizedstandardizedcustomizedcustomized Settlementscash and deliverymost cash and few deliverydeliverydepends on individuals Trading marketExchange tradedExchange tradedOTCOTC Liquidityhighhighlowlow Marketing-to-marginnorequirednono Time of settlementmaturitydailymaturityperiodically Initial investmentoption premiuminitial margin nodepends Default risk assumed byClearing houseclearinghouseBoth partiesBoth parties ProsDefault risk free liquiditycustomization no initial investment Consinitial investment inflexibledefault risk for both party illiquidity Source: author’s own. . 1Pros and cons of options The pros of options are obvious. Firstly, they have no risk to assume more loss than premium but have possibility to get unlimited potential profit. Secondly exchanged-traded options are highly liquid and OTC traded options are flexible. However, the cons of options are also explicit, such as the difficulty to decide when to enter into a long position. Because buying an option needs to pay option premium, if the spot price cannot go above (for a long call) or go below (for a long put) the breakeven point the hedger will suffer a loss, and depends on statistics the possibility of a long position to lose is about 66%. 5. 2Pros and cons of futures It definitely makes sense for most companies whose majors are in businesses but not professional in forecasting the price of commodities price volatility, which can make them pay more attention on their core competences instead of fearing about volatile price. Nonetheless, taking neutralized strategies make hedgers give up the possibility of both profit and loss. Moreover, instead of hedging risks by companies, shareholders can hedge themselves according to their preferences. Additionally, if other competitors of the same industry don’t apply hedging strategies, in fact, it is the hedging company itself that assumes risks, because competitive pressures are the same for other all competitors but different for the hedging company its own. 5. 3Pros and cons of forwards Basic pros and cons have been listed in the table in front of this chapter. Generally, compared to futures, the most explicit pro is that forwards are highly customized and therefore the con is that they are hardly liquid. 5. 4Pros and cons of swaps Basic pros and cons have been listed in the table in front of this chapter. Gernally, compared to futures and forwards the most precise pros is that both counterparties could reap benefits from a swap, such as in a currency swap where a firm with a low rate may get a cheaper loan as other firms with high rates, and the counterparty may get a payment as compensation. However the corresponding cons is that counterparty may need to pay commision to intermediary, because it is difficult to find an appropriate counterparty by itself. 6Practical example of corporate commodity price risk hedging 6. 1Introduction on firm’s practical hedging strategy Air China is an airline company, whose cost of fuel oil occupies 44. 75% of total revenue in 2008. To hedge the fuel oil price risk, Air China bought a call option with strike K1, meanwhile sold a put option with strike K2, where K1 How to cite Corporate Strategies to Hedge Commodity Price Risks Applying, Essay examples