Multiple sclerosis | Biology homework help
Suppose someone argued that the reason twins often share multiple sclerosis is not because its hereditary, but because of some abnormality in the mothers pregnancy, such as maternal exposure to a toxin or virus. What argument could you give against this hypothesis?
Please discuss.
1. Your original post must have a clear understanding of the topic and should be a minimum of 1 paragraph with at least 5 sentences
Environmental Responsibility
Why should a business be concerned with being environmentally responsible when polluting might be substantially less expensive and helps in the pursuit of a low-cost producer strategy?Choose a publicly traded company and explore its website. Does the companys website include information on its values? Does it address the companys environmental impact and policies related to corporate citizenship? Please be sure to include references to the pages you visited.
Week 11 discussion board | WRK 110 – The Confidence Advantage | Strayer University
Youve made it to the final discussion! Lets look back!
How have the strategies youve learned throughout this course helped you begin mastering your career confidence?
Describe how you plan to use what youve learned to build, apply, maintain, and/or project your confidence in the workplace.
What advice would you give another student regarding their plan to harness the power of their confidence at work?
Respond to one or more of your classmates posts.
PCR Technique Questions
1- What is the main principle and purpose of PCR technique?2- What is Taq Polymerase enzyme? And why its important in PCR?3- What are the reagents needed in PCR?4-Why there are different temperatures with certain time required during the PCR stages? explain5- Draw a schematic of the PCR steps procedure.6- How the PCR products can be measured? 7- What are the types of PCRs?8- What are the clinical uses of PCR technology?
Measurements Chemistry Lab Worksheet
Measurement(adapted from Flinn ChemTopicLabs) Experiment PURPOSE OF THE EXPERIMENTMuch of what we know about the world has been obtained from experiments performed in the laboratory. Measurements are a large part of laboratory practice, and skill is required to design experiments so that careful measurements can be made. Skill and practice are also needed to minimize user error for equipment in the laboratory. At the same time, it is important to understand the limitations of scientific measurements.INTRODUCTIONExperimental observations often include measurements of mass, length, volume, temperature, and time. When obtaining measurements in the lab, there are three parts to any measurement:? its numerical value? the unit of measurement ? and the uncertainty in the measurementA laboratory measurement should always be recorded withitsnumerical value first and the unit of measure written last. Uncertainty in measurements can arise in two forms: improper calibration (this arises from imperfections in the device) or errors that arise from skill and technique of the user. Improper calibration of a device results in what is called systemic error. Systematic error results in measurements being offset in the same direction each time. Imagine getting on a scale at the doctor?s office that was accidently set to zero when the nurse?s 5 lb purse was placed on the scale. This improper calibration will offset all of the patient weights that day making them seem lighter by 5 lbs. Error that arises from technique and skill of the user or limitations of the measuring device that is sometimes in one direction or sometimes in another and called random error.Imagine shooting a bow and arrow at a target. Each time a shot is taken it comes close to the bullseye, but may be placed to the left, right, down, or below. The error is random and results from the technique and skill of the shooter. Systematic error affects the accuracy of a measurement or how close that measurement is to a true ?accepted? value. Random error often affects the precision of a measurements or how well multiple measurements agree with one another. In the lab we can minimize random error by taking multiple measurements of the same type and using the average and/or standard deviation to determine the value. If there is a widely accepted value for the measurements taken, accuracy can be determined through a comparison using percent error. If no ?accepted? value in known, it is typically difficult to determine accuracy. Careful calibration and upkeep of equipment is necessary to maximize accuracy of measurements.In lab we will be using many different electronic devices (balances, spectrometers, pH meters temperature probes) and glassware to make measurements. No matter how well these instruments are taken care of and calibrated, there will still be some degree of uncertainty in the measurements taken. It is important that no matter which device we use, we only record numbers in the measurement that are reliable and significant to our measurement. If I stand on a scale at home and the digital readout provides a weight of 134.5 lbs, I would not tell people that I weigh 134.5687923 lb nor would say I weigh 130 lb(neither of these numbers reflects the certainty with which the measurement was taken). Any digits that are considered reliable and important from the device are called significant figures. Significant figures include all certain digits on a measuring device plus one uncertain figure. This means that measurements made with rulers and graduated glassware should always be estimated to one place beyond the smallest scale division that is marked. A 100-mL graduated cylinder has major scale divisions every 10 mL and minor scale divisions every 1 mL. It is therefore possible to “estimate” the volume of a liquid in a100-mL graduated cylinder to,the nearest 0.1mL.Example:The 50 mL cylinder to the right has major divisions at 10 mL and minor divisions at 1 mL. It is therefore possible to estimate to the nearest 0.1 mL.Three observers might estimate the volume of liquid in the 50-mL graduated cylinder shown at the right as 43.1, 42.9, or 43.0mL. These are all valid readings! It would NOT be correct to record this volume of liquid as simply 43mL. Likewise, a reading of 43.05 mL would be too precise.Some instruments, such as electronic balances, give a direct reading-there are no obvious or marked scale divisions. This does NOT mean that there is no uncertain digit in an electronic balance measurement; it means that the result is being reported digitally. On an electronic centigram balance, for example, the mass of a rubber stopper might be measured as 5.67 g. If three observers measured the mass of the same rubber stopper, they might obtain readings of 5.65, 5.67, and 5.68 g (all would be appropriate measurements). You should record all numbers given to you on the electronic balance (even if the last number is a zero).As measured values are added, subtracted, multiplied, and divided during calculations, it is important that calculated numbers are rounded so that they are only as reliable as the least precisely measured value used in the calculation (we learned these last week).Today we will be leaning to take volume measurements from three types of glassware (beaker, graduated cylinder, and volumetric pipette). We will also be learning to use the electronic balance to measure the mass of the water samples from the glassware. Make sure to use proper technique when taking these measurements. Recording the number of significant figures reflects the precision of these devices.At the end of the lab, the density of each sample measured with a beaker versus a graduated cylinder versus a volumetric pipettewill be calculated and compared to the accepted density of water. From our comparison of which piece of glassware was the closest to the actual density of water, we will also be able to determine which type of glassware in the most accurate. This will allow us to understand which types of glassware should be used under which situations in the lab.Safety:The single most important aspect of working in the laboratory is SAFETY. It is your responsibility to make sure that you follow all safety rules at all times, and to graciously help everybody else in the laboratory (including the instructor) to do the same. Remember to notify the instructor of any accident or spill, large or small. Do not pick up broken glass yourself. Label all containers before you put chemicals in them, even if the chemical is just water or the chemical will be in the container for only a few minutes. Hazardous Materials You should consider all chemicals to be hazardous with regard to tasting and touching. The substances in this lab (water) is generally non-hazardous, but you should always treat any chemical as being an irritant–if you spill it on your skin or in your eyes, use water to rinse it off. ALL WASTES MUST BE DISCARDED IN THE APPROPRIATE WASTE CONTAINERS, AS DIRECTED BY THE INSTRUCTOR.Technique1. Mass measurements (balance)Any weighing with an electronic balance should be recorded with all the digits shown on the screen (no more and no less-even zeroes). Because it is a delicate instrument that can be damaged easily, certain precautions should be taken.Never place a chemical directly on the balance pan. Use a dry container.1. Never pour liquids into a container while it is on the balance! 2. All measurements need to be within the capacity of the balance. Do not place heavy object on top of the balance.3. Should a spill occur, clean it up immediately.4. Never place any item that is hot onto the balance pan.5. Never move or known the balance from its spot on the bench.To weigh substances in containers or vials, two common procedures are used.a) Weighing by difference: With nothing on the balance, press zero. Place your container on the balance that will hold your sample and record its mass. Remove the container from the balance and add the sample. Place the container back on the balance and record the net mass. The mass of the sample is found by subtracting the mass of the container from the net mass taken. The same number or decimal places should be reported for your sample mass that was used to obtain it.b) Weighing by taring: With nothing on the balance, press zero. Place your container on the balance that will hold your sample. Next the TARE (zero on some balances)buttonis pressed so the screen on the balance reads zero. Remove the container from the balance and add the sample. Place the container back on the balance and record the mass as the mass of the sample. Make sure to copy all digits from the balance.2. Volume Measurements: Several tools can be used to measure volume.a) For solids: If the object is a rectangular solid, you can measure the 3 dimensions and calculate volume (length x width x height). The unit of volume will be cm3. You can also use water displacement to measure the volume of an irregular solid.b) For liquids: Add the liquid sample to the piece of glassware. When recording the volume, water in a glass container forms a meniscus (a curved surface that is lower in the middle than at the edge). You should record your volume by sighing to the bottom of the meniscus and making sure to always read the value at eye level. You should read the glassware just like you read a ruler. The number of places you should report is one number(place value) after the smallest division. Each different type of glassware will have a unique scale division so pay attention to the glassware you are using. If the bottom of the meniscus sits directly of a graduation line, a zero should be placed in the uncertain spot to hold place value.Procedure1. Clean a 600 mL beaker and fill it about halfway with distilled water from the front of the class. Bring it to your station. This is the water you will use to prepare your samples for the duration of the lab. Place a thermometer from your drawer in the water to record the temperature later in the procedure.Measuring volume with a 50 ML BEAKER2. Using the electronic balance, measure and record (in Data Table 1) the mass of a dry 50 mL beaker.3. Add roughly 20 mL of distilled water to the dry beaker using the lines on the beaker to approximate. Your beaker should contain approximately 20 mL of water. Using the graduation marks on the beaker, record the exact volume of water for your sample into your data table for trial 1 using the correct number of significant figures.4. Place the beaker containing the sample of water on the balance and record the total mass in data table 1. To determine the mass of the water sample only, subtract the mass of the dry beaker from the total mass of the beaker + water. In your answer, round to the same number of decimal places on the balance you used. (This is called the weigh by difference technique). Dump your sample of water in the sink.5. Dry your beaker and repeat steps 2-4 under Trial 2using the same beaker. Do not copy the mass of the beaker from Trial 1 to Trial 2 (reweigh everything!).Measuring volume with a 50 ML GRADUATED CYLINDER6. Using the electronic balance, measure and record (in Data Table 2) the mass of a dry 50 mL graduated cylinder. 7. Add roughly 20 mL of distilled water to the dry cylinder using the lines on the cylinder to approximate. Your cylinder should contain approximately 20 mL of water. Using the graduation marks on the cylinder, record the exact volume of water for your sample into your data table for trial 1.8. Place the cylinder containing the sample of water on the balance and record the total mass in data table 2. To determine the mass of the water sample only, subtract the mass of the dry cylinder from the total mass of the cylinder + water. In your answer, round to the same number of decimal places on the balance you used. (This is called the weigh by difference technique). Dump your sample of water in the sink.9. Dry your glassware and repeat steps 6-8 under Trial 2 using the same cylinder. Do not copy the mass of the cylinder from Trial 1 to Trial 2 (reweigh everything!).Measuring volume with a 20 ML VOLUMETRIC PIPETTE10. Using the electronic balance, measure and record (in Data Table 3) the mass of a dry 50 mL beaker (the beaker will only act as a container to hold the water for mass measurements-do not use the beaker to measure the volume of the water in mL!!!). 11. Using the 20 mL volumetric pipette, measure a 20mL sampleof distilled water and add it to the dry 50 mL beaker. (Your instructor will show you how to measure volume with the pipette.) Under exact volume of water on table 3, record the value 20.00 mL. (Do not look at the beaker to measure volume!!!!)12. Place the beaker containing the sample of water on the balance and record the total mass in data table 3. To determine the mass of the water sample only, subtract the mass of the dry beaker from the total mass of the beaker + water. In your answer, round to the same number of decimal places on the balance you used. (This is called the weigh by difference technique). Dump your water sample in the sink.13. Dry your glassware and repeat steps 10-12 for Trial 2.Record temperature and Clean Up14. Using the thermometer from the beginning of lab, record the temperature of water in data table number 4. Refer to the Table of Densities provided by your instructor to obtain the accepted density of water at this temperature. Record the accepted density in data table 4. This is the ?known? or ?true? value of the density of water. (This will be our target value to examine accuracy of the glassware.)15. Clean up your lab station by dumping any water down the drain. Give your glassware a rinse with distilled water and hang it to dry on the drying racks near the window. If you used permanent marker on the glassware for labelling, remove the label by using ethanol and a paper towel. Wipe down your bench and wash your hands. Goggles must be kept on as long as other groups still have glassware and chemicals out on their benches.Data Analysis and CalculationsSee table below for equations for your calculations.For each trial, calculate an ?experimental? value for density using your data for each piece of glassware in tables 1-3.For each piece of glassware, average the densities from trial 1 and 2 to obtain the average density of water for the glassware. Show all your work for these calculations and record the results in each data table.In data table 5, calculate the percent error associated with each piece of glassware. Your accepted value will be the density from your reference and your experimental value will be the average density you calculate for each piece of glassware.The concept behind using density to see how accurate your glassware is??Known Value? or ?Accepted Value?you get the ?known? value of density simply by looking it up on the given reference table (this is the target you are aiming for) ?Experimental Value Density? Density = mass = g volume mL *for mass, you use the mass of water you measure in each piece of glassware *for volume, you use the mL of water you on the side of the glassware * mass and volume are amounts you measure, the resulting density will be an ?experimental? value Percent Error The percent error formula will compare your experimental value to the known value and tell you how far away from the known (target) you are. A negative value means your experimental value is less than the known, and a positive value means your experimental value is greater than the known. A low percent error means you were able to make an accurate volume reading with that piece of glassware.% Error = (experimental ? accepted) x 100 acceptedName _____________________________________________Measurement(adapted from Flinn ChemTopicLabs) Experiment Data SheetShow your work!!Please take note that the measurements here are different from the video. Perform all calculations based on the measurements listed on this packet in red. The measurements were obtained as shown in the video.Table 1.50 mL BEAKERTrial 1Trial 2Exact volume of waterfrom beaker18 mL21 mLMass of dry beaker21.32 g24.69 gMass of beaker plus water sample36.28 g45.13 gMass of water sample *subtract*1. Using the data from Table 1, calculate the density of water as measured using the beaker from Trial 1 and Trial 2. (Since this is not you final answer, you can round to four decimal places.)(1pt)2. For the beaker, calculate the average density of water. Report your average with the correct significant figures from your measured values of mass and volume.(1pt)Table 2.50 mL cylinderTrial 1Trial 2Exact volume of waterfrom cylinder17.6 mL21.2 mLMass of dry cylinder75.32 g70.91 gMass of cylinder plus water sample92.59 g94.21 gMass of water sample *subtract*3. Using the data from Table 2, calculate the density of water as measured using the graduated cylinder from Trial 1 and Trial 2. (Since this is not you final answer, you can round to four decimal places.)(1pt)4. For the graduated cylinder, calculate the average density of water. Report your average with the correct significant figures from your measured values of mass and volume.(1pt)Table 3.20 mL pipetteTrial 1Trial 2Exact volume of water from pipette20.00 mL20.00 mLMass of dry beaker31.02 g28.01 gMass of beaker plus water sample50.85 g48.16 gMass of water sample *subtract*5. Using the data from Table 3, calculate the density of water as measured using the volumetric pipette from Trial 1 and Trial 2. (Since this is not you final answer, you can round to four decimal places.) (1pt)6. For the pipette, calculate the average density of water. Report your average with the correct significant figures from your measured values of mass and volume. (1pt)Table 4.Temperature of water:20.3 oCAccepted Density from reference:0.998141 g/mL7. Use the average density, along with the accepted density of water from table 4 to calculate the percent error for each piece of glassware. Round each percent with three significant figures. (2pts)Post Lab Q&A1. Which piece of glassware (the 50 mL beaker, 20 mL volumetric pipette or 50 mL graduated cylinder) did you found to be the most accurate? Justify why that piece ofglassware is the most accurate using your data from the experiment.(2 pts)2. Which piece of glassware (the 50 mL beaker, 20 mL volumetric pipette or 50 mL graduated cylinder) did you found to be the most precise?Justify why that piece ofglassware is the most precise using your data from the experiment.(2 pts)3. Would your measured density increase, decrease, or stay the same: You correctly measured the mass of your water sample, but before reading the volume you spilled some of the sample onto the bench? Why? (1 pts)4. Which piece of glassware would you choose to use if your procedure asked you prepare a sample of water that is 10 mL for a reaction? The measurement needs to be fairly accurate and also needs to be done quickly. Why? (1 pts)
MDC History Parables of Jesus in The Synoptic Gospels Essay
Reflect on one of the parables of Jesus in the synoptic gospels (not an opinion paper)Hint: List of parables can be found on Page 100 of Powell Text book. I suggest looking at one that has a longer length or is found in all three or two of the synoptic gospels. What I am looking for? -What is the metaphor symbolizing? What is the mundane/ordinary object(s) of the parable and to what spiritual truth does it point to?- What does it say or tell about the audience?- Is there a social or cultural change for the 1 century person? – Make a theological statement based off the parable. In other words what does it say about God/Jesus or the Kingdom of God?
Discussion 2 patient information | Nursing homework help
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It is very important for all mental health professionals to take very detailed and thorough historical information from their patients. This information should include an adequate social history, complete medical history, and a full mental status examination with a probable treatment plan.
Describe three reasons it is important to gather detailed and extensive information from any patient before you counsel him/her or make medication suggestions. ÿUse evidence-based research to support your position.
Define malingering. ÿDiscuss two ways to differentiate between malingering and a DSM5 diagnosis. ÿUse evidence-based research to support your position.
at least 500 words ( 2 complete pages of content) formatted and cited in current APA style 7 ed ÿwith support from at least 3 academic sources which need to be journal articles or books from 2019 up to now. PLEASE, DO NOT INCLUDE THE WHOLE QUESTION. ONLY SUB HEADINGS IF NEEDED. NO WEBSITES allowed for reference entry. Include doi, page numbers, etc. Plagiarism must be less than 10%.
making the practicum connection | Computer Science homework help
Welcome to Applied Learning Practicum!ÿ
Executive format programs have an applied learning component (internship/practicum) that is an integral (essential) part of the established curriculum. These programs require the student take part in an internship (that is offered by the sponsoring employer through a cooperative agreement with the school), job shadow experience, or job reflection experience.
The INTR course serves as one way to help students reflect and connect their coursework to their practical work experience. This course is one of several integrated components that connect the practical experience to the curriculum. In this course, students can choose to participate in an alternative work-study, internship, cooperative education, or Curricular Practical Training (CPT) in an area directly related to the student?s course of study.
Due to the embedded practical experience component in the curriculum, students must identify their work-study, internship, cooperative education experience by the start of the term.
Please answer the following questions to identify what you have done to prepare for success in your INTR course this semester.
Question 1 – Briefly explain any steps you are taking, or plan to take, to gain hands-on experience in your program of study. (50 ? 100 words)
Question 2 – State two goals you hope to achieve through applying your coursework this term to your workplace experience.ÿ(50 ? 100 words)
Tricare | Accounting homework help
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Introduction:
TRICARE is the healthcare provider for active or retired military personnel. It also covers the family of these persons. There are a variety of plans and qualifications that go along with this coverage. In order to understand TRICARE, it is important to understand the benefits available and to whom they are available.
Tasks:
Summarize the benefits of TRICARE for an active military person.
What if the active military person has family?
Describe the benefits if the active military person is overseas.
What if the active military person overseas brings family?
Organizational strategies of adopting health policies-apa-250 words-2
ÿÿIMPORTANT PLEASE READ FULL INSTRUCTIONS. NO PLAGIARISM! NO QUOTES, MUST PARAPHRASE. I WILL CHECK FOR RECYCLED WORK AND PLAGIARISM. THIS ASSIGNMENT IS DUE 04/13/23 AT 9PM PST. IF YOU CANT MEET THIS DEADLINE, DONT AGREE TO DO MY ASSIGNMENT. PRICE ISNT NEGOTIABLE. ÿPLEASE UNDERSTAND BY ACCEPTING TO DO MY WORK, I HAVE STRICT RULES. I DONT LIKE TO DISPUTE, BUT I WILL IF DIRECTIONS ARENT BEING FOLLOWED. IF I SEE SOMETHING WRONG AFTER PURCHASING, I WILL GIVE YOU A CHANCE TO FIX IT IMMEDIATELY. THIS DOESNT MEAN HOURS ÿLATER. IF YOU TURN SOMETHING INTO ME EARLY, I EXPECT YOU TO FIX MY ASSIGNMENT IMMEDIATELY. DONT LIE TO ME, IF THESE RULES ARENT FOLLOWED, I WILL DISPUTEÿÿ
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Policy adoption can be very challenging to healthcare leaders. Many organizations employ consultants to assist with the implementation of new policies. There have been significant changes to health policies over the past few years that have forced providers to institute implementation strategies, ensuring that they remain competitive and profitable. ÿDiscuss the following questions in a minimum of 250 words:
Does Blue Ridge PaperProducts? (BRPP) policy differ from a traditional employee stock ownership plan (ESOP)? What are the implications?
Are there any ethical concerns in the case? Why? Why not?
Did the case present a buyer-dominant or a seller-dominant approach?
What important lesson(s) are learned from this case study? How would you apply this to practice?
