Answer:
A. Examples of laboratory hazards:
In general, there are three types of hazards personnel may encounter while working in laboratories at the NIH.
Possible hazards include:
• Biological Hazards – bloodborne pathogens
• Chemical Hazards – carcinogenic, flammable, or corrosive materials
• Physical Hazards – pyrophoric materials, lasers or radiation.
It is possible, even common, for a single laboratory to have types of hazards associated with more than one of
these categories at once. Engineering controls should be used as primary barriers, functioning to contain the
hazards. Personal protective equipment (PPE) should be used in combination with engineering controls to
reduce the risk of worker exposure to laboratory hazards. A risk assessment should be used to determine the
hazards associated with a particular laboratory or laboratory operation, and establishing which engineering
controls should be utilized and what PPE should be selected. Information on how to perform a risk assessment
is described in Biosafety in Microbiological and Biomedical Laboratories 5th Edition. For assistance with
performing a risk assessment and selecting proper PPE, please contact your Institute's Safety and Health
Specialist, or the Division of Occupational Health and Safety.
B. Appropriate laboratory attire, laboratory coats and applicable standards:
While in a laboratory at the NIH for any reason, all personnel must wear appropriate clothing attire that prevents
direct contact of materials with the skin. Examples of attire that is appropriate includes long pants or leg
coverings and closed toe shoes. In addition, a task appropriate laboratory coat, as determined by a risk
assessment, must be worn while performing laboratory operations. Following a thorough risk assessment,
guidance to the selection of laboratory coats can be obtained from Tables 1 and 2. Table 1 lists the three types
of laboratory hazards and the applicable laboratory coat material standards. Table 2 provides a more detailed
description on the application of these standards and examples of laboratory coats that meet these standards.
Table 1. Summary of laboratory hazards and applicable test standards
Type of Laboratory Hazard Applicable Test standard
Biological Hazards ASTM F1670 (penetration by synthetic blood) and
ASTM F1671 (bloodborne pathogen exposure)
Liquid or Chemical Hazards AATCC Method 42 (resistance to the penetration of
water by impact) and ASTM F903 (liquid chemical
barrier)
Physical Hazards NFPA 701 or 2112 (flame propagation tests)
The standards listed in Table 2 serve as standardized testing methods to determine protection levels of materials
against certain hazardous or hazard surrogates. These standards should be considered when selecting a
laboratory coat material when working with the hazards that correspond to the applicable hazard or hazard
surrogate tested. These testing methods only test the material and do not test the complete laboratory coat
making it important to consider characteristics of the laboratory coat such as seams, stitches and where the
openings, snaps or buttons are located when selecting a laboratory coat. A complete description of the
standards can be viewed by contacting your Institute's Safety and Health Specialist,
Explanation:
Which of these is NOT true about natural selection? A. Natural selection only applies to heritable traits. B. Natural selection usually occurs over a short period of time. C. Natural selection occurs to populations not individuals.
Answer:
I'm pretty sure it's B
Explanation:
I'm sorry if it's not but I'm almost positive.
hi this is for ss plz help me
What is the result of cell reproduction?
Answer:
answer should be A, hope this helps!
1. During photosynthesis, plants use energy from sunlight to make food out of
carbon dioxide and water. Plants respond to environmental stimuli such as
light, gravity, and changing seasons. Circle the right word
A. Photosynthesis takes place in chloroplasts/ mitochondria, which contain
chlorophyll.
B. Photosynthesis / cellular respiration releases the energy stored in food and
produces carbon dioxide and water.
C. Growth, wilting, and dormancy are examples of plant responses / stimuli.
Plants complete their life cycles by alternating between sporophytes and
gametophytes.
D. Flowering plants produce seeds / spores and fruit following fertilization.
E. Some plants use plantlets, tubers, or runners to reproduce sexually/ asexually
Whether you think it is a good solution or not? Explain why
Answer:
yes I think it is a good solution because
Explanation:
climate change can fossil fuels in the ground ,
Invest in renewable energy , Switch to sustainable transport , Help us keep our homes cosy ,
Improve farming and encourage vegan diets ,
Restore nature to absorb more carbon ,
Protect forests like the Amazon , and also
Protect the oceans.
let me know if this helped
Answer:
I think it's a good solution.
Explanation:
Since the 2 main causes for climate change are burning fuel and methane released by animals it would be logical to cut down on them and use more nature friendly options.
Which level of organization encompasses the others?
A.
Cells
B.
Tissues
C.
Organs
D.
Organ Systems
Answer:d
Explanation: because it encompasses all other levels if you see
True/False: Animal viruses can only infect animal cells.
Answer: Hi there I think I have the answer to your problem let me help You!!!
Explanation:
False because it can not only infect just animale cells but can affect humans if spreded and can be spreded to fly's. Then the flys spread it to other animals.
Have a nice day! don't forget the rate and give branlist!
Which of the following provides the best example of the parts of a system working together to achieve a specific function?
A. Red blood cells are capable of transporting oxygen because of their chemical composition.
B. Glands in the mouth, the stomach, the pancreas, and the small intestine all secrete chemicals that break down nutrients.
C. Specialized cells in a plant's leaf open and close in response to changing conditions
Answer:
B
Explanation:
The separate glands are helping to break down nutrients
What is poison?
pls help
Answer:
Explanation:
In biology, poisons are substances that can cause death, injury or harm to organs, tissues, cells, and DNA usually by chemical reactions or other activity on the molecular scales, when an organism is exposed to a sufficient quantity.
QUESTION AND DIAGRAM IN THE PICTURE
CORRECT ANSWE GETS BRAINLIEST
REPORTING ANY LINKS
Answer:
Estrogen and Progestrone harmone help in the thickening of the inner wall of the uterus i.e. endometrium layer,for the reception of fertilized eggs and their development.
Progestrone prepares the uterus for a fertilizef egg to implant.
The uterus lining sheds if no fertilization occured because the sperm passes through the uterus so.the lining of the uterus again starts to break down and shed ,and new mestural period begins
Explanation:
Hope this helps u!!
Please help me with this!
Answer:
Homzygous
Explanation:
i need helps with this assignment im trying to get caught up because its been a weird school year
Can someone please help me asap
Where are fats, carbohydrates, and proteins broken down into particles small enough to be absorbed into the body?
Hint: These enzyme-rich juices break the fat molecules down into fatty acids
and glycerol for easier absorption into the body.
The enzymes also carry out the final deconstruction
of proteins into amino acids
and carbohydrates into glucose.
This happens in the small intestine's lower regions,
the jejunum and ileum,
which are coated in millions of tiny projections called villi.
Options:in the stomach
in the illium
in the duodenum
in the jejunum
Answer:
Duodenum (option 3)
Explanation:
Digestion of carbohydrates, proteins, and fats continues in the small intestine. Starch and glycogen are broken down into maltose by small intestine enzymes. Proteases are enzymes secreted by the pancreas that continue the breakdown of protein into small peptide fragments and amino acids.
The duodenum is the first section of the small intestine and is the shortest part of the small intestine. It is where most chemical digestion using enzymes takes place
Can someone please help me answer these questions? i'll give the brainlest.
What tissues do human cold viruses infect?
Answer/Explanation:
Colds are minor infections of the nose and throat caused by more than 200 diseases. (I will edit my answers once i find the correct answer sorry)
please help
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How can the amount of energy absorbed by Earth's surface change?
Pleaseee pleasee help :)
Answer: first one is a second d
Explanation:
name the two kinds of particles that make up a water particle
Answer:
Explanation:
2 atoms of hydrogen and 1 atom of oxygen. or H20
how many parts to a virus?
1
2
3
4
Answer:
2
Explanation:
The most simple viruses have only two parts: 1) a genome (DNA or RNA) that is a blueprint with instructions for making more viruses and 2) a capsid protein shell that protects the genome.
URGENT
Hypothesis: If I project light rays through water then they will refract, or bend, the most.
Procedure: Test variable (independent variable):
The outcome variable (dependent variable):
Answer:
The independent variable is the projection of yhe light rays, and the dependent variable is the refraction and bending
Komodo dragons (a lizard species) and red-tailed boas (a snake species) are both reptiles. They share a common ancestor population that lived about 250 million years ago, but they have been separated in different environments, with different food sources, for millions of years. Komodo dragons and red-tailed boas have some shared structures. They also have some differences in their structures.
1.Why do Komodo dragons and red-tailed boas have some shared structures and some different structures?
Komodo dragons and red-tailed boas have some shared structures because they both evolved from a common ancestor population that lived about 250 million years ago.
What is the difference has come over the time in these species?Over time, as these two species separated into different environments with different food sources, they underwent separate evolutionary trajectories that led to differences in their structures. However, many of the underlying genetic and developmental mechanisms that produced their ancestral structures are still present in both species.
For example, both Komodo dragons and red-tailed boas have scales, which are a common feature of reptiles. Scales serve to protect the skin from abrasion and injury, as well as to reduce water loss. They also both have a vertebral column, which provides support for the body and protects the spinal cord.
At the same time, Komodo dragons and red-tailed boas have differences in their structures because they evolved in different environments and have different feeding strategies. Komodo dragons are large, carnivorous lizards that use their sharp teeth and powerful jaws to hunt and kill prey, while red-tailed boas are constrictor snakes that use their muscular bodies to suffocate and swallow their prey whole.
As a result, the structures of their jaws, teeth, and digestive systems are adapted to their respective diets and hunting strategies, and differ in significant ways.
Overall, the shared and different structures between Komodo dragons and red-tailed boas reflect both their common evolutionary heritage and their divergent evolutionary trajectories.
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According to the cell theory, which describes cells?
All organisms are composed of multiple cells.
All cells have the same structure and function.
Cells are found in everything on Earth.
All living cells come from other living cells.
Answer:
3. All living cells come from other living cells
As elevation _________, the average annual temperature __________.
A - increases, decreases
B - decreases, decreases
C -increases, increases
Explanation:
option A, i really dont have an explanation for that
HELP PLEASE READ THE ANSWER FROM NUMBER 1 AND MAKE IT AS A SENTENCE
Answer:
The solution is gonna work by carbon dioxide being removed from atmosphere by this solution.
Explanation:
Hope it helps you:)
What could you make or do to make sure your bean plants stay upright and don’t fall down?
Answer:
I got this off of g o o g l e
Explanation:
I put pairs of small fence posts (one on each side) down the row. I then tied twine to the fence post and ran it on either side of the plants. This keeps them from falling over to the side. If you plant thick enough they won't fall to the front or back.
SOMEONE HELP ASAPPPP PLEASEEE,PLEASE EXPLAIN HOW U GOT YOUR ANSWER, I NEED AN EXPLANATION IN ORDER TO COMPLETE THIS! NO LINKS OR YOU WILL BE REPORTED, I WILL GIVE BRAINLIEST!!!!!
Answer:
Dire wolves- these wolves had long ulna and radius bones to support the wolve's need to run for extended periods of time to hunt animals. The distal bones allowed the wolves to keep the wolf balanced and helped ensure the body could handle running on land
the fruit bat- the small yet long and thin ulna, radius, and distal bones of the fruit bat ensure the bat is light enough to fly quickly and avoid weighing down the bats wings. the light bones allow the bat to fly quickly as the bats do not require strong bones to run like the dire wolf
whether you think it is a good solution or not? Explain why
Answer:
So it's easy to think that this section, on defining and analyzing the problem, ... Then, we'll talk about whether or not you really want to solve the problem, or whether ... But this is the legwork, the foundation on which you'll lay effective solutions.
Explanation:
katelyn is working on a project about classifying cells as either prokaryotic or eukaryotic. she is observing a cell under an electron microscope that does not have a cell wall but does have a nucleus. how should katelyn classify this cell? A. as a prokaryotic cell B. as a eukaryotic cell C. there is not enough info to classify this cell D. the cell had components of both types
Katelyn should classify this cell as a eukaryotic cell. The presence of a nucleus is a defining characteristic of eukaryotic cells, while prokaryotic cells do not have a nucleus. The absence of a cell wall is not enough to classify a cell as prokaryotic, as some eukaryotic cells also lack cell walls.
What are eukaryotic cells?Eukaryotic cells are cells that have a distinct membrane-bound nucleus and other membrane-bound organelles that carry out specific functions. These cells are typically larger and more complex than prokaryotic cells, which lack a nucleus and organelles.
Eukaryotic cells are found in plants, animals, fungi, and protists. They are characterized by their compartmentalization, meaning that various parts of the cell are separated by membranes, allowing for specialized functions to be carried out within specific areas of the cell.
Examples of eukaryotic organelles include the mitochondria, endoplasmic reticulum, Golgi apparatus, and lysosomes.
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