NATIONAL CENTER FOR CASE STUDY TEACHING IN SCIENCEPart I – The IntruderTh e intruder entered the kitchen of the upscale restaurant at 2:43am. All was quiet. All was dark.Th e intruder moved quickly, but he was not in a rush. He knew that the baker would not arrive until 4:00am, as shedid most mornings. Most of the meal for the private lunch to be catered later that day had already been prepped.He peered over the stainless steel countertops and into bowls of chopped vegetables, rising dough, and homemademarinades until he found what he was looking for—the dessert prep. Pecan pie was the dessert of choice for the lunchparty. He smiled. He could not have chosen a better dessert to carry out his plan!Th e intruder reached into his pocket with a gloved hand and produced a small bag with what appeared to be choppedpecans. These were not pecans, however. The bag contained the chopped seeds of a Taxus baccata tree.Th e intruder swiftly dumped the contents of the bag into the bowl of chopped pecans. He stirred the mixture withhis hand. Satisfied that no one would notice his addition of the extra ingredient, the intruder made his way out of thekitchen and into the night.Questions1. What type of plan could be carried out by adding the seeds of Taxus baccata to a pecan pie?2. What are taxines?
Question
NATIONAL CENTER FOR CASE STUDY TEACHING IN SCIENCEPart I – The IntruderTh e intruder entered the kitchen of the upscale restaurant at 2:43am. All was quiet. All was dark.Th e intruder moved quickly, but he was not in a rush. He knew that the baker would not arrive until 4:00am, as shedid most mornings. Most of the meal for the private lunch to be catered later that day had already been prepped.He peered over the stainless steel countertops and into bowls of chopped vegetables, rising dough, and homemademarinades until he found what he was looking for—the dessert prep. Pecan pie was the dessert of choice for the lunchparty. He smiled. He could not have chosen a better dessert to carry out his plan!Th e intruder reached into his pocket with a gloved hand and produced a small bag with what appeared to be choppedpecans. These were not pecans, however. The bag contained the chopped seeds of a Taxus baccata tree.Th e intruder swiftly dumped the contents of the bag into the bowl of chopped pecans. He stirred the mixture withhis hand. Satisfied that no one would notice his addition of the extra ingredient, the intruder made his way out of thekitchen and into the night.Questions1. What type of plan could be carried out by adding the seeds of Taxus baccata to a pecan pie?2. What are taxines?
Solution
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The plan that could be carried out by adding the seeds of Taxus baccata to a pecan pie is likely a plan to poison someone. Taxus baccata, also known as the English yew, is a tree that produces seeds which are highly toxic if ingested. The seeds contain a compound called taxine, which can cause serious harm or even death if consumed in large enough quantities.
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Taxines are a group of toxic compounds found in the seeds, leaves, and bark of the yew tree (Taxus baccata). They are highly poisonous and can interfere with the electrical signals in the heart, causing changes in heart rhythm, potentially leading to death. Symptoms of taxine poisoning can include dizziness, dry mouth, nausea, vomiting, abdominal pain, irregular heart rate, and in severe cases, cardiac arrest.
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