Spiders carefully move their legs

Why Spiders Do Not Stick to Their Own Sticky Web Sites

                                              Photo Courtesy:InfoVisual

Researchers at the Smithsonian Tropical Research Institute and University of Costa Rica asked 
why spiders do not stick to their own sticky webs. Repeating old, widely quoted but poorly 
documented studies with modern equipment and techniques, they discovered that spiders’ legs are 
protected by a covering of branching hairs and by a non-stick chemical coating. Their results are 
published online in the journal, Naturwissenschaften. 
They also observed that spiders carefully move their legs in ways that minimize adhesive 
forces as they push against their sticky silk lines hundreds to thousands of times during the 
construction of each orb.   
The web-weaving behavior of two tropical species, Nephila clavipes and Gasteracantha 
cancriformis, was recorded with a video camera equipped with close-up lenses. Another video camera coupled with a dissecting microscope helped to determine that individual droplets of sticky glue slide along the leg’s bristly hair, and to estimate the forces of adhesion to the web. By washing spider legs with hexane and water, they showed that spiders’ legs adhered more tenaciously when the non-stick coating was removed. 
The Smithsonian Tropical Research Institute, headquartered in Panama City, Panama, is a unit 
of the Smithsonian Institution. The Institute furthers the understanding of tropical nature and its 
importance to human welfare, trains students to conduct research in the tropics and promotes 
conservation by increasing public awareness of the beauty and importance of tropical ecosystems. 
Website: www.stri.si.edu.  

Spiders carefully move their legs
The web-weaving behavior 
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A CME on Thalassemia Awareness by the ICMR

 Migrants from West Pak the prevalence was 8.3%.

Ludhiana, 16th January, 2013 (Shalu Arora and Rector Kathuria):A CME on Thalassemia Awareness and Role of Molecular Genetics sponsored by the Indian Council for Medical Research (ICMR), New Delhi was conducted on the 16^th of January 2013 at the Christian Medical College and Hospital, Ludhiana. The CME was attended by over 250 delegates which included Gynaecologists and Paeditricians from the Ludhiana city, including CMC Faculty.

Honorable Civil surgeon Dr.Subash Batta, was the Chief Guest, and Dr.K.Ghosh, Director, NIIH, Mumbai was the Guest of Honor, Dr.R.Colah, Dy Director, NIIH, Mumbai, Professor Vijay Obed, Dy Director, Prof.S.M.Bhatti, Pricipal, Prof. K.Masih, Medical Superintendent were also present.

The program was on generating awareness on the various aspects of Thalassemia, advancements in management and preventive strategies which included molecular diagnostics and prenatal diagnosis. The welcome address was given by Prof. Sheila Das, Principal Investigator, ICMR Thalassemia Molecular Genetics Project, Dr.K.Ghosh spoke on Why awareness of Thalassemia is necessary, Dr.R.Colah gave introduction of Molecular Genetics in Thalassemia and CVS study, Dr.Ranjeet S.Mashon, Research Scientist, ICMR Thalassemia Molecular Genetics Project gave a brief report of CMC experience in molecular genetics in Hemoglobinopathies, Ms. Geetanjali spoke on Awareness and Family sstudy in Antenatal women, Dr. Atul Goel, Assoc. Prof, Paediatrics spoke on challenges on managing a child with Thalassemia and Dr. J.John spoke on Bone Marrow Transplant in Thalassemia Children CMC experience.The CME was concluded by a vote of Thanks by Dr.Sheila Das.

It has been found by Dr Sheila Das & her Team in a previous ICMR Research Project by CMC Ludhiana that 3.5 – 5 % were carriers of Beta Thal Major in the general population while in some casts like Aroras , Khatris , Ramgariah Sikhs , Jains the prevalence was 4.8% - 9.1% and in Migrants from West Pak the prevalence was 8.3%.

All pregnant ladies during their first 3 months of Pregnancy are requested to come forward to CMC to get their blood screened for Beta Thalassemia, as this is the only center in Punjab to provide this facility as the ICMR Thalassemia Lab CMC Ludhiana is fully equipped with machines costing  Rs 75-80 lakhs sponsored by ICMR New Delhi .                                                        (Wed, Jan 16, 2013 at 5:11 PM

Dr.Ranjeet S.Mashon may be contacted for more details at 8146560673

A CME on Thalassemia Awareness at CMC Ldh.

Dr Sheila Das and her Team found more facts