Ireland’s most northerly point at Malin Head recorded the country’s highest temperature of the day on Tuesday.The Inishowen weather station recorded a high of 25.7C yesterday.Dublin the Phoenix Park hit 25.5C, while temperatures were a cool 18.1C further south in Cork. Weather for rest of the week is set to be warm and a mix of sunny spells and showers.Tonight will remain dry in most areas of the north west.Met Eireann forecasters said it will feel close tonight with temperatures ranging from 14-16C.Thursday will be dry in the morning with bright spells. Some rain is expected in the afternoon. The forecast says: “In the west it will be cloudy by the afternoon with rain and drizzle. The rain will spread eastwards later but it will become just light and patchy. It will brighten later in the evening with sunshine breaking through. Warm and humid, with maximum temperatures of 18 to 21 degrees.”Malin Head records Ireland’s hottest temperature on Tuesday was last modified: July 24th, 2019 by Rachel McLaughlinShare this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window)
Look into Dr Bergman’s many books, including his recent release, C.S. Lewis: Anti-Darwinist: A Careful Examination of the Development of His Views on Darwinism.(Visited 717 times, 1 visits today)FacebookTwitterPinterestSave分享0 by Dr Jerry BergmanIt has long been believed that the sperm tail is a very simple structure, mostly a tail that wags to propel the sperm forward to reach the egg. Textbooks pictured this structure as a simple string like filament much thinner than a human hair. It was observed that the sperm tail produced harmonic bending waves, thus they were said to cause the sperm to swim like a tadpole. The bigger question then was, what was in the sperm head?Ideas about how sperm cells work date from their discovery by Leeuwenhoek in the 17th century. It was once widely believed that there exists a little person inside of every sperm cell head that traveled to the mother’s womb. The womb’s only role was to feed the child as it grew into a baby. This view was called preformationism. Another preformationist idea held that it was the egg that contained a little person that would begin to grow into a baby once the sperm initiated conception.Preformationist view vs modern structural discoveriesWhen it was recognized that the formation of a child required both a sperm (the smallest cell in the body) and an egg (the largest cell in the body), it was realized that reproduction was far more complex than once thought. Next, the parts of the sperm were studied. Researchers observed that the head contained mostly 23 haploid chromosomes. The first part of the tail, they found, contained mitochondria, the powerhouses of the cell that produce ATP. The rest of the tail consisted of a long thread-like structure. That ‘simple’ thread, the tail, is at last now being revealed by more detailed observations, and it turns out to be amazingly complex!Research around 1968 proved that the sperm tail—properly called a flagellum—consists of a complex system of sliding filaments that are connected by elastic springs resembling cylinder-like structures. The cross-linked filament bundles, found both in cilia and flagella, are ubiquitous in life. Scientists also found evidence that this system contains a scaffold, the function of which is to enable the sperm to swim in the hostile environment necessary to reach the egg in the Fallopian tube. It was also discovered that the basic sperm tail design is very similar in most animal species. No evidence was found for it having evolved from a simple structure in primitive animals to a complex structure in higher animals.The Latest WiggleNew research published in 2017 has discovered that the tail system is far more complex than thought 50 years ago. The front design is vital to transmit information to distant parts of the tail to enable it to function as an effective unit for steering and propelling the sperm to its end goal.[i] The system works by complex elasto-hydrodynamics that we can only briefly outline here. Each tail is programmed to produce slightly different movements in order for the sperm to reach the egg. Scientists learned some of the details of this system partly by physically moving parts of dead sperm tails and designing mathematical models of the motion.Any one movement in this complex sequence appears to be able to trigger motion right through to the distant parts of the tail.One mechanism is counter-bending of a passive flagellum that instigates a compensatory counter-curvature in the section that it is connected to.[ii] The researchers found that movement, which begins near the sperm’s head, is transmitted along the interconnected system, creating controlled oscillatory movement along the tail’s full length.[iii] The tail “utilizes interconnected elastic spring structures to transmit mechanical information from the front to the distant parts of the tail, helping it to bend appropriately and ultimately swim toward an egg.”[iv]The sections within the tail communicate by sensing the front of the tail near the section that contains the mitochondria. Each section in turn responds to information in front of it to synchronize their motions. The sperm tail mechanism first creates a sliding motion between the filaments inside the cylindrically arranged structure, producing the tail bending. Movement in this complex sequence triggers motion down to the distant parts of the tail. Even with these revelations, researchers are only beginning to understand what goes on. Phys.org says,“The mechanism of a sperm tail first creates a sliding motion between filaments, inside this cylindrically arranged structure, finally resulting in a tail bending, a bit like the piston that converts back and forth motion in to [sic] rotation of the wheel on a train. Any one movement in this complex sequence appears to be able to trigger motion right through to the distant parts of the tail.“The big question now is, are particular springs in the tail coupled-up to transmit specific biomechanical information, and just [do] these ‘rowers’ self-organize?It turns out that the design of the sperm tail is just as complex as the design of the bacteria flagellum, which is well known to Darwin skeptics as an icon of intelligent design. Both are complex well-designed structures, one located on a so-called simple primitive organism, and the other on the sperm of the most complex organism known, namely humans.This example illustrates a trend in biology. When structures do not seem very difficult to evolve, further research shows them to be far more complex and, consequently, much more difficult to explain by unguided evolution. What appear to be simple structures, such as sperm tails, on further investigation are shown to be far more complex, requiring a good understanding of biomechanics, especially elasto-hydrodynamics.If Darwin were alive today, would he still try to explain such complex phenomena with his theory of gradual transmutation via natural selection? In 1859, when he suggested that all life was the result of slow, gradual variations (now thought to come from genetic mistakes), he could not have known the intricacies of sexual reproduction down to the tip of a sperm tail. Those who know today have no such excuse.[i] “The mechanical properties of sperm tails revealed,” https://phys.org/news/2017-05-mechanical-properties-sperm-tails-revealed.html[ii] Coy, Rachel and Hermes Gadêlha. 2017. The counterbend dynamics of cross-linked filament bundles and flagella, Journal of the Royal Society Interface. 14(130):1-10. May 31.rsif.royalsocietypublishing.org/lookup/doi/10.1098/rsif.2017.0065[iii] Phys.org, Ibid.[iv] Phys.org, Ibid.Dr Jerry Bergman, professor, author, and speaker, is a frequent contributor to Creation-Evolution Headlines. See all his posts on his Author Profile page.
Share Facebook Twitter Google + LinkedIn Pinterest Happy President’s Day! Light snow lingers across parts of Ohio this morning, and it may take a while to get out of all parts of the state. We expect 60% coverage of at least some on and off light snow today, but do not expect any noteworthy accumulations. The rest of the state will be just cloudy and chilly, as north winds continue to flow across the eastern corn belt. High pressure will try to move over the Great Lakes and the northern parts of the state overnight into tomorrow morning, so we do have a chance at seeing a little bit of sunshine early in the day tomorrow, but clouds quickly return and then increase through the balance of the day. We have a significant weather system on the way for midweek. Cold air will be sufficiently far enough south to allow for a large part of the state to see precipitation start as snow on Wednesday morning. In fact, we see the potential for some significant accumulations out of this event. From US 20 northward, we can see a coating to 3 inches Wednesday. From US 20 southward we have concern about 3”-8” snow totals piling up. Perhaps down in far southern Ohio, we can see a rain-snow mix, or even predominantly rain for the even, but that area will be relatively small. . This will be very wet snow in areas that see snow, with the heaviest accumulations running from SW Ohio to central parts of the state. The snow is likely done by early afternoon, but in ending, we expect a changeover to rain. We can see an additional few .25″-.75” of liquid before everything is done Wednesday night. There is big potential for this to be an absolute mess. The maps below show the potential liquid equivalent totals and system snow totals the way we see them this morning. Clouds do give way to some sun on Thursday, and we see partly sunny skies hold for most areas through Friday. The only exception may end up being in far southern and southeastern parts of the state Friday afternoon and evening, where we may end up with a few scattered light rain showers. Temps for Thursday and Friday will end up near normal…temps chilly, but not bitter cold. Another big batch of moisture remains on track for the weekend. We are putting rain in the forecast for both Saturday and Sunday, although we will grant that Saturday will have most of the rain focus south of I-70. Sunday will feature the heaviest rains and full state coverage. For the two days combined, we expect .5”-1.5” rain totals with coverage at 100%. Rivers and creeks will continue to run full, and localized flooding is likely. Sunday will also feature very gusty winds, averaging 20-40 mph statewide. We turn colder for the first couple of days next week, but we still are not that far below normal. Partly sunny skies are expected. We can’t rule out a chance of some light snow in northern Ohio next Wednesday, especially NW Ohio, but even that does not look to be nearly as impressive as our next two systems this week and weekend. The extended 11-16 day forecast suggests a significant move colder as we start off the month of March. Next Thursday through the following Monday we see much colder, well below normal temps across the entire state. That air mass, along with good strong north winds, will produce some lake effect snow chances for the first weekend in March, the 2nd and 3rd. A much broader coverage snow event is showing up for the 5th bringing a coating to 2 inches, with nearly full state coverage.
The Central Drugs Standard Control Organisation has sent a three-member team to Jaipur to inquire into an alleged unethical human clinical trial conducted by a pharma company at a private hospital in the Rajasthan capital, the Drugs Controller General of India (DCGI) said on Saturday.State panel Rajasthan Health Minister Kalicharan Saraf also constituted a three-member panel to probe into the alleged incident. According to State officials, nearly two dozen people hailing from Rajasthan’s Churu and Bharatpur districts were allegedly subjected to the unethical human clinical trial for an osteo-ortho drug at the hospital. DCGI Dr. S. Eswara Reddy, in Delhi, said, “We have sent a team of three officials to Jaipur to inquire into the matter along with the State drug controller.” Mr. Saraf said a three-member panel, headed by an additional director-level officer has been constituted to probe the matter. “Action will be taken, if lapses are found, the Health Minister said. Hospital visitedThe panel on Saturday visited the hospital located in Vishwakarma Industrial Area to initiate the probe. “Principal investigator and patients enrolled in the clinical trial were not available at the site. We have asked the hospital staff to provide necessary documents related to the trial,” Dr. Ravi Prakash Sharma, the head of the three-member probe panel constituted by the State government, said.