Judul: Pengawasan kesuburan pada sapi
Abstrak: Beberapa fenomena reproduksi diawasi sedemikian rupa, sehingga didapat tingkat kesuburan yang lebih tinggi pada suatu kelompok sapi. Pengawasan dilakukan terhadap waktu estrus dan kelahiran, jumlah sel telur yang diovulasikan, jumlah fetus per kebuntingan, embrio sapi pada awal masa pertumbuhannya, dan perkawinan sapi. Estrus sekelompok sapi betina diserentakkan dalam suatu waktu tertentu dengan pemberian preparat-preparat hormon progestogen atau prostaglandin. Penyerentakan berahi dapat meningkatkan angka kebuntingan dan memperpendek selang waktu melahirkan dengan kebuntingan berikutnya. Waktu kelahiran sekelompok sapi betina yang bunting tua diserentakkan dengan pemberian preparat kortikosteroid, glukokortikoid, atau prostaglandin. Penyerentakan kelahiran memperpendek selang waktu antar kelahiran, mempermudah mengawasi kelahiran, dan menghindarkan kemungkinan terjadinya distokia. ...
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Judul: Kesuburan Sapi Perah Mengikuti Penyuntikan Norgestoment Dan Estradiol Valerate (Syncro-Mate B) (Studi Kasus di Kabupaten Sukabumi -Jawa Barat)
Abstrak: Masalah usaha peternakan sapi (perah, potong) semakin banyak dibicarakan berbagai pihak terutama pemerintah dalam kaitannya dengan uoaya menunjang program perbaikan gizi masyarakat yang berasal dari susu maupun daging. salah satu aspek cukup penting yang turut menunjang pelipat gandaan jumlah maupun mutu genetik ternak adalah bidang reproduksi. Banyak hal ini yang terkait dan saling memberikan manfaat untuk dapat merealisasikan pengembangan usaha ternak sapi.
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Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell