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Related Concept Videos

The Nucleus01:32

The Nucleus

The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
Aneurysm IV: Nursing Management01:22

Aneurysm IV: Nursing Management

Vigilant monitoring for aneurysm rupture is essential for patients undergoing aortic surgery.Preoperative Nursing ManagementContinuously monitor the patient for manifestations of aneurysm rupture, such as pallor, weakness, tachycardia, hypotension, abdominal, back, groin, or periumbilical pain, changes in consciousness, and a pulsating abdominal mass. Regularly assess the patient's peripheral pulses.Instruct the patient to consume a clear liquid diet the day before surgery and administer...
Cardiac Catheterization IV: Nursing Management01:26

Cardiac Catheterization IV: Nursing Management

Nursing responsibilities before cardiac catheterization include:Assess for allergies and establish baseline health status.Before cardiac catheterization, assess the patient for allergies to contrast dye. Perform a comprehensive baseline assessment, including vital signs, heart and breath sounds, and a neurovascular assessment of the extremities, noting distal pulses, skin color, and temperature. Instruct the patient to fast for 8-12 hours before the procedure. Evaluate baseline laboratory...
Urinary Tract Infection IV: Nursing Management01:17

Urinary Tract Infection IV: Nursing Management

In managing urinary tract infections (UTIs) in nursing, a comprehensive assessment is essential. Begin by gathering subjective data, such as the patient’s complaints of dysuria (painful urination), urinary frequency, urgency, suprapubic pain, and any lower abdominal discomfort. This information can be complemented by questions regarding previous UTIs, sexual activity, and personal hygiene practices, which can provide insight into risk factors. Objective assessment should focus on signs like...
Design Example: Design of an Irrigation Channel01:27

Design Example: Design of an Irrigation Channel

Trapezoidal channels are widely used in irrigation systems due to their cost-effectiveness and efficiency in conveying water. Trapezoidal channels feature a flat bottom and sloping sides, making them stable and easier to construct compared to other shapes. The bottom width and side slope ratio are determined based on the required flow capacity and site conditions. The side slope is kept gentle for unlined channels to prevent soil erosion.Hydraulic parameters in channel design include the flow...
Bioreactor Controls-II01:18

Bioreactor Controls-II

In aerobic fermentations, oxygen is vital for microbial growth and metabolite production. Since air comprises only about 20% oxygen and the gas is poorly soluble in water—just 9 ppm at 20°C—supplying sufficient oxygen becomes a critical challenge, especially in high-demand processes like yeast growth or citric acid production. Even a fully saturated broth may offer only a few seconds of oxygen availability.To address this, sterile or scrubbed air is introduced into the fermentor via a sparger...

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Related Experiment Video

Updated: Jun 27, 2026

Intranuclear Microinjection of DNA into Dissociated Adult Mammalian Neurons
13:39

Intranuclear Microinjection of DNA into Dissociated Adult Mammalian Neurons

Published on: December 10, 2009

Nucleus management with irrigating vectis.

Aravind Srinivasan1

  • 1Aravind Eye Hospital and Postgraduate Institute of Ophthalmology, 1, Anna Nagar, Madurai - 625 020, India. s.aravind@aravind.org

Indian Journal of Ophthalmology
|December 17, 2008
PubMed
Summary
This summary is machine-generated.

Manual small incision cataract surgery (MSICS) uses a nucleus extraction technique with an irrigating vectis. This method offers excellent visual outcomes and rapid recovery, making it a safe and cost-effective option.

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Gentle Isolation of Nuclei from the Brain Tissue of Adult African Turquoise Killifish, a Naturally Short-Lived Model for Aging Research
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Last Updated: Jun 27, 2026

Intranuclear Microinjection of DNA into Dissociated Adult Mammalian Neurons
13:39

Intranuclear Microinjection of DNA into Dissociated Adult Mammalian Neurons

Published on: December 10, 2009

Gentle Isolation of Nuclei from the Brain Tissue of Adult African Turquoise Killifish, a Naturally Short-Lived Model for Aging Research
09:28

Gentle Isolation of Nuclei from the Brain Tissue of Adult African Turquoise Killifish, a Naturally Short-Lived Model for Aging Research

Published on: August 9, 2022

Area of Science:

  • Ophthalmology
  • Surgical Techniques

Background:

  • Modern cataract surgery aims for improved unaided visual acuity and rapid recovery.
  • Reducing incision size is key to early visual rehabilitation and better outcomes.
  • Manual small incision cataract surgery (MSICS) utilizes incisions between 5.5 to 7 mm.

Purpose of the Study:

  • To describe a simple and effective nucleus extraction technique in MSICS.
  • To highlight the benefits of nucleus extraction with an irrigating vectis.

Main Methods:

  • Extraction of the cataract nucleus through the MSICS tunnel after prolapse into the anterior chamber.
  • Utilizing an irrigating vectis to combine mechanical and hydrostatic forces for nucleus expression.

Main Results:

  • The irrigating vectis technique is a time-tested method with over 95% success rate for nucleus extraction in MSICS.
  • This technique achieves results comparable to phacoemulsification.

Conclusions:

  • Nucleus extraction with an irrigating vectis is a highly effective technique in MSICS.
  • It offers advantages such as wider applicability, enhanced safety, a shorter learning curve, and lower cost.