Though mouse spermatogenesis is acystic, we observed prominent ball - like structures containing degenerating cells in the mouse Boule mutant, resembling the degenerating cysts seen in the fly boule testis (Figure 5I and 5K,
arrowheads).
Venus expression is absent from giant flat cells (white
arrowheads).
Black
arrowheads show the presence of LacZ positive cells in the parietal endoderm.
Arrowheads below the diagram denote the positions of primers (Table 3) used in making the allelic exchange constructs for inactivation of ospC or complementation.
Arrowheads in C and D indicate accumulations of hGDAsBMP and hGDAsCNTF respectively at the pial surface of lateral funiculus white matter (see also Fig. 4 A, B).
GFP expression was not detected in the Repo - expressing BBB glial cells (
arrowheads in H and I).
Arrowheads indicate some examples of GFAP + / hMito + hGDA cell bodies at low and high magnification.
Arrowheads indicate nuclei.
Arrowheads indicate nuclei and circles indicate the base of a root hair.
Arrows point towards microspheres inside and
arrowheads outside of tumour vessels.
Host (YFP) cells appear red when stained for cell class specific markers, while double - labeled, donor - derived cells (arrows,
arrowheads, and carrots) appear yellowish - red.
(G) GFP fluorescence around lipid droplet - like structures in the intestine that are marked by arrows and
arrowheads.
(A) Rosettes (
arrowheads) and pseudo outer nuclear layers (arrow) are detected in explants triple stained for nuclei (blue; DAPI), cone (green; Calbindin), and rod photoreceptors (red; XAP2).
Yellow
arrowheads indicate Acks signals.
Native Americans dug systematically for Arkansas novaculite, a silica - rich mineral used for
arrowheads some 10,000 years ago.
Panel A, Model AP — solid line, right - facing
arrowheads: fertility; solid line, left - facing
arrowheads: survival.
Arrowheads delineate the dorsal - ventral expression domains.
Compared with wild - type embryos (A), uninjected alk8 — / — embryos are weakly (class 2; C2) dorsalized (B), with loss of the ventral fin fold (
arrowheads).
She helped with farm chores and rambled in the woods, collecting
arrowheads and catching fireflies, often in the company of her beloved Grandma Macon.
(a) Low - signal - intensity calcium (arrow) and lipid core (
arrowheads) can be seen.
Nucleoli (dark spots indicated by
arrowheads, top) disappear in the presence of egg - cell cytoplasm (bottom).
Some look like brains, some like
arrowheads, others like beads, propellers or puffs of cotton.
Wadley's colleague Lucinda Backwell immediately noticed a striking resemblance to
the arrowheads fashioned by Late Stone Age, Iron Age, and Bushman cultures, all of which flourished much later.
Bone is ideally suited to
arrowheads, she says, because it is lightweight and easy to manipulate.
In May researchers reported the discovery of the world's oldest
arrowheads, on the east coast of present - day South Africa.
Open
arrowheads, separated mOBs and mOCs; filled
arrowheads, direct mOB - mOC contact.
X-ray from one month prior to the steroid / anesthetic injection demonstrates moderate joint space narrowing (arrows) and bony proliferation (
arrowheads).
Arrowheads used in hunting, Shen explains, should have relatively large scars at their tips.
ARROWHEADS and spearheads unearthed from ancient North American sites have always been taken as solid evidence of hunting by early Americans.
«My guess is that once hunting became unimportant to subsistence, people continued to make
arrowheads to keep them as ornamental objects, to exchange for trade, or to pass on to their children,» says Shen.
Under a powerful light microscope, he looked for tiny chips and abrasions on the edges of
the arrowheads.
Fashioning
arrowheads may then have developed as an art form, rooted in the Indians» former hunting culture.
Immunohistochemical stainings of Ki67 and pancytokeratin (Ki67 is stained brown, pancytokeratin is stained pink) indicate proliferation of hepatocytes (
arrowheads) and biliary epithelial cells (arrows) in TAK1 / RIP3 - deficient mice.
Those used for cutting, however, have smaller wear marks along their edges, while
arrowheads used for scraping hides become polished on one or both surfaces.
Celebrated in art (such as the 19th - century engraving below), the tale persisted, unproven, until the 1980s, when archaeologists diving off the small island of Takashima found copper coins, metal helmets, and
arrowheads dating to the 13th century.
Compared to a control (left), epalrestat treatment (right) reduces the number of metastatic tumors (
arrowheads) in the lungs of mice injected with human basal - like breast cancer cells.
For prehistoric times, the main evidence is from forensic archaeology: the proportion of skeletons that had bashed - in skulls, or
arrowheads embedded in bones, together with archaeological evidence such as fortifications.
Along a 3 - kilometer stretch of the Tollense River, archaeologists from the Mecklenburg - Vorpommern Department of Historic Preservation (MVDHP) and the University of Greifswald (UG) have unearthed wooden clubs, bronze spearheads, and flint and bronze
arrowheads.
These included rudimentary points made of sharpened bone, antler or ivory; more intricate, flaked stone tips popularly familiar as «
arrowheads»; and a composite point made of bone or antler with razor blade - like stone microblades embedded around the edges.
Diamond - shaped holes in bones, for example, match the distinctive shape of bronze
arrowheads found on the battlefield.
In Bronze Age Europe, even the historical accounts of war were lacking, and all investigators had to go on were weapons in ceremonial burials and a handful of mass graves with unmistakable evidence of violence, such as decapitated bodies or
arrowheads embedded in bones.
It seems that simple stone blades make adequate
arrowheads, so they might have been used in lightweight projectile weapons as far back as 100,000 years ago, when the blades first appeared.
The distinctive pots, possibly used as drinking vessels, are nearly ubiquitous; flint
arrowheads, copper daggers and stone wrist guards are common, too.
The finding of pottery and of numerous flint blades,
arrowheads, and a decorated stamp seal made of carnelian, a semi-precious stone, also revealed that this cave was used in the Chalcolithic and the Neolithic periods.
Sure it works for gluing together
arrowheads, «but quartz sand is found all over South Africa and is a better adhesive; it forms a better bond.
A few of the victims were bound before death, and some have
arrowheads of stone and obsidian embedded in their bones.
Fingering the hands of the Presidency in the latest plot, with Oni and Fayemi as the local
arrowheads, the governor alleged that a concocted fresh suit was being rehashed and to be filed against him on the same «old allegation» that had been trashed up to the Supreme Court.
The convener of the Save Nigeria Group, Pastor Tunde Bakare, whose group, SNG, was among
the arrowheads of the Occupy Nigeria protest that shot down the...
The Osage Indian
arrowheads and the great old hay sickles and the pie crimpers once manufactured in Yates Center, even the huge old turkey platter owned by town founder Abner Yates himself, all seem in mint condition.
One book I recently read, claimed that every ice - age, and pre-ice-age door ever found, was either littered with
arrowheads, or bore evidence of being the subject of s sustained assault by arrows, and other implements of violence.