Lactic Acid and Salt Separation Using Membrane Technology

Acid whey is a by-product of cheese and yoghurt manufacture. The protein and lactose within acid whey can be recovered using nanofiltration and electrodialysis, but this leaves a waste stream that is a mixture of salts and lactic acid. To further add value to the acid whey treatment process, the possibility of recovering this lactic acid was investigated using either low energy reverse osmosis membranes or an electrodialysis process. Partial separation between lactic acid and potassium chloride was achieved at low applied pressures and feed pH in the reverse osmosis process, as a greater permeation of potassium chloride was observed under these conditions. Furthermore, lactic acid retention was enhanced by operating at lower temperature. Partial separation between lactic acid and potassium chloride was also achieved in the electrodialysis process. However, the observed losses in lactic acid increased with the addition of sodium chloride to the feed solution. This indicates that the separation becomes more challenging as the complexity of the feed solution increases. Neither process was able to achieve sufficient separation to avoid the use of further purification processes.

Deviation and Atrophy of Middle Phalanx of Hand Following Partial Separation in Syndactyly Patient: Their Fault or Ours?

Backgrounds: Syndactyly is failure of differentiation in which the fingers fail to separate into individual appendages. It is the most common congenital hand anomaly, with an incidence of 1 in 2,000 to 2,500 live births. Surgical separation of fingers as early as 6 month-old is indicated when syndactyly involves digits of unequal length (i.e., ring and little fingers). Early separation is also required in complex syndactyly and cases of acrosyndactyly. The timing of surgery of all other cases of syndactyly remains somewhat controversial; most suggest surgical correction before age of 18 months, whereas others prefer to wait until after this age.Case Presentation and Operation Technique: A 13-year old boy, presented with fusion of all fingers of the right hand at birth. Prior to his current visit, he underwent partial separation of the right fingers at the age of 6 y.o. at a local hospital. Following partial separation, the fingers did not grow normally. Current X-ray showed atrophy and deviation of middle phalanx. We performed separation of syndactyly between index and middle finger, and between fourth and small finger in our hospital. Interdigital webbings are released using local flap and the remaining raw surface is covered using full-thickness skin grafts. On follow up, the patient showed good functional and aesthetic outcome. He is able to write with his right hand with better coordination.Discussion: Complex syndactyly reconstruction is a challenging surgical problem. Common post surgical findings include rotational deformity, angular deformity, and nail deformity. We describe how we have altered our approach in these findings.Conclusion: Congenital syndactyly should be corrected early in life. Careful dissection, the use of a dorsal rectangular flap in combination with 2 volar triangular flaps, and use of full thickness skin grafts ensure a satisfactory outcome and minimize the number of operations per web

2. The institutions of government and the separation of powers

This chapter explores the key institutions—the legislature, the executive, and the judiciary—and considers the relevance of the principle of the separation of powers in respect of the UK Constitution. It begins with a discussion of the functions fulfilled by these institutions, including an examination of their structure and key roles, allowing fuller exploration of the separation of powers doctrine in the UK Constitution. In respect of this, the chapter identifies a common distinction drawn between what is known as the pure and partial separation of powers. One favours total separation, the latter allowing a degree of overlap to the point of ensuring a system of checks and balances. Application of this distinction enables broader exploration of the UK’s application of the separation of powers doctrine.

Enhanced Analytical and Physical Characterization of Mixtures of Random Bay-Position Brominated Boron Subnaphthalocyanines Enabled by Establishing a Partial Separation Method.

The synthesis of axially brominated boron subnaphthalocyanine (BsubNc) was investigated using BBr3 as the Lewis acid source. Random bay position bromination was found to occur as previously described by our...

Mangandung dalam Perkabungan Masyarakat Batak Toba

Menurut kepercayaan masyarakat Batak Toba kematian bukan sebuah totalitas tetapi sebuah perpisahan parsial. Ada kepercayaan bahwa kematian tidak pernah memisahkan manusia secara total, hal ini terungkap lewat ritual yang dilakukan saat anggota keluarga meninggal, konteks kematian dalam masyarakat Batak Toba adalah adat istiadat mereka. Salah satu ritual adat kematian adalah kebiasaan mangandungi jenazah.Mangandung adalah salah satu ritual kematian yang berasal dari kata andung yang artinya ratap. Kebiasaan mangandungi pada masyarakat Batak Toba berkembang menjadi kesenian yang dikenal dengan tradisi nyanyian andung. Tradisi mangandung dianggap sebagai bagian dari adat dan tergolong penting sebagai bentuk ekspresi kesedihan dengan kata kata dan irama tertentu. Penelitian ini menggunakan metode etnografi.The Cosmology of Tetabuhan in Ngaben Ritual Ceremony. According to the Batak Toba community belief death is not a totality but a partial separation. There is a belief that death never separates humanity totally, it is revealed through the ritual performed when family members died, the context of death in Batak Toba society is their custom. One of the customary rituals of death is the habit of mangandungi bodies. Mangandung is one of the rituals of death that comes from the word that means grandmother wailed.The habit of mangandungi in Toba Batak society developed into an art known as the singing andung tradition. Tradition mangandung is considered as part of custom and is important as a form of expression of sadness with certain words and rhythms. This research used ethnography method.

2. The institutions of government and the separation of powers

This chapter explores the key institutions — the legislature, the executive, and the judiciary — and considers the relevance of the principle of the separation of powers in respect of the UK Constitution. It begins with a discussion of the functions fulfilled by these institutions, including an examination of their structure and key roles, allowing fuller exploration of the separation of powers doctrine in the UK Constitution. In respect of this, the chapter identifies a common distinction drawn between what is known as the pure and partial separation of powers. One favours total separation, the latter allowing a degree of overlap to the point of ensuring a system of checks and balances. Application of this distinction enables broader exploration of the UK's application of the separation of powers doctrine.

Rapid Enrichment of Dehalococcoides-Like Bacteria by Partial Hydrophobic Separation

ABSTRACT Organohalide-respiring bacteria can be difficult to enrich and isolate, which can limit research on these important organisms. The goal of this research was to develop a method to rapidly (minutes to days) enrich these organisms from a mixed community. The method presented is based on the hypothesis that organohalide-respiring bacteria would be more hydrophobic than other bacteria as they dehalogenate hydrophobic compounds. The method developed tests this hypothesis by separating a portion of putative organohalide-respiring bacteria, those phylogenetically related to Dehalococcoides mccartyi, at the interface between a hydrophobic organic solvent and an aqueous medium. This novel partial separation technique was tested with a polychlorinated biphenyl-enriched sediment-free culture, a tetrachloroethene-enriched digester sludge culture, and uncontaminated lake sediment. Significantly higher fractions, up to 20.4 times higher, of putative organohalide-respiring bacteria were enriched at the interface between the medium and either hexadecane or trichloroethene. The selective partial separation of these putative organohalide-respiring bacteria occurred after 20 min, strongly suggesting that the separation was a result of physical-chemical interactions between the cell surface and hydrophobic solvent. Dechlorination activity postseparation was verified by the production of cis-dichloroethene when amended with tetrachloroethene. A longer incubation time of 6 days prior to separation with trichloroethene increased the total number of putative organohalide-respiring bacteria. This method provides a way to quickly separate some of the putative organohalide-respiring bacteria from other bacteria, thereby improving our ability to study multiple and different bacteria of potential interest and improving knowledge of these bacteria. IMPORTANCE Organohalide-respiring bacteria, bacteria capable of respiring chlorinated contaminants, can be difficult to enrich, which can limit their predictable use for the bioremediation of contaminated sites. This paper describes a method to quickly separate Dehalococcoides-like bacteria, a group of organisms containing organohalide-respiring bacteria, from other bacteria in a mixed community. From this work, Dehalococcoides-like bacteria appear to have a hydrophobic cell surface, facilitating a rapid (20 min) partial separation from a mixed culture at the surface of a hydrophobic liquid. This method was verified in a polychlorinated biphenyl-enriched sediment-free culture, an anaerobic digester sludge, and uncontaminated sediment. The method described can drastically reduce the amount of time required to partially separate Dehalococcoides-like bacteria from a complex mixed culture, improving researchers' ability to study these important bacteria.